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<strong>130</strong><br />

CHAPTER<br />

Acute Pain Service<br />

Rita Agarwal and David M. Polaner<br />

Most hospitals with significant numbers of pediatric surgical<br />

inpatients have found that it is important to organize and maintain<br />

an acute pain service (APS). Such a service permits a consistency<br />

of approach and availability of coverage that is not possible with ad<br />

hoc care by individual clinicians. An organized service also allows<br />

the introduction of multidisciplinary personnel that may be<br />

helpful in expanding the nature of services offered. Clinical<br />

specialties, such as oncology, neonatology, and pediatric medicine,<br />

can consult and contribute to the APS as well, thereby expanding<br />

its reach and scope. It is possible for general hospitals to care for<br />

pediatric patients with an adult APS, as long as expert consultation<br />

and input is sought and clear protocols and guidelines are established.<br />

To do otherwise risks inviting medication and equipment<br />

errors with a high potential for adverse events.<br />

SCOPE OF PRACTICE<br />

Although the primary role of most acute pain services is to order,<br />

perform, and monitor regional blocks, patient-controlled analgesia<br />

(PCA), and other analgesics, the management of a variety of painful<br />

conditions occurring in the hospital setting is becoming<br />

increasingly important (Table <strong>130</strong>–1).<br />

Acute Postoperative Pain<br />

The high level of understanding that the anesthesiologist brings<br />

to bear on opioid and nonopioid analgesics, regional blockade,<br />

and other modalities of analgesic therapy has produced documented<br />

improvements in care when an APS model is instituted.<br />

While routine administration of oral analgesics may be still<br />

ordered by the operating surgeon, regional blockade, patientcontrolled,<br />

nurse-controlled, and parent-controlled analgesia<br />

(PCA and its variants), and continuous opioid infusions can be<br />

most effectively managed by the APS. 2 Because the APS staff can<br />

be out of the operating room to see children as needed, inadequate<br />

analgesia, complications, side effects, and other problems can be<br />

dealt with in a timely manner.<br />

Acute Nonoperative Pain<br />

Outside the perioperative period, oncology and hematology<br />

patients have the greatest need for analgesics. Both cancer-related<br />

pain and sickle cell pain are common problems in these children.<br />

Their pain is often complex, and may involve a combination<br />

of acute exacerbations superimposed on chronic pain. Their<br />

spectrum of problems may include neuropathic and complex<br />

pain problems, opioid tolerance, anxiety, and psychological issues.<br />

The APS often has greater familiarity with escalating opioid doses,<br />

converting to different opioids, use of multimodal and polypharmaceutical<br />

techniques, and psychological and behavioral treatments.<br />

Other frequent APS referrals are patients with recurrent<br />

abdominal pain, pulmonary patients with chest pain, patients with<br />

chronic pancreatitis hospitalized with an acute exacerbation, and<br />

patients with musculoskeletal pain with or without underlying<br />

coexisting medical conditions.<br />

Management of Continuous<br />

Regional Blockade<br />

The use of regional analgesic techniques for management of<br />

postoperative pain, medical (sickle cell crisis, neuropathic, vasoocclusive<br />

crisis), and traumatic pain has increased dramatically.<br />

Children often have a fear of needles and/or an inability to cooperate<br />

but pediatric anesthesiologists have become increasingly<br />

comfortable placing the majority of these blocks in children who<br />

are sedated or anesthetized. Both single-shot peripheral nerve<br />

blocks and continuous catheter techniques have become more<br />

feasible and popular with the increased use of ultrasound. 3–5 Use<br />

of standardized (but flexible) sets of postoperative orders for<br />

medications, monitoring, procedures, and contingencies help<br />

minimize side effects and problems and improve compliance and<br />

communication.<br />

Consultation<br />

It is not uncommon for an APS to be consulted for a variety of<br />

patients who are admitted to other services for pain management.<br />

Examples include the child admitted with idiopathic acute<br />

abdominal pain who has had an array of inconclusive diagnostic<br />

tests. Other common examples include patients with extremity<br />

pain out of proportion to their apparent physical condition,<br />

patients with acute pancreatitis, headaches, post–dural puncture<br />

headaches, and children being weaned from large doses of opioids<br />

or sedatives but who are otherwise ready to be discharged. 6<br />

ORGANIZATION<br />

Although the primary goal of most APSs is to manage post -<br />

operative pain, there are several other functions that must be<br />

provided by this service (Table <strong>130</strong>–2). Therefore, it is logical that<br />

an anesthesiologist functions as director or codirector of such a<br />

service. Very little information is available on the organization and<br />

make up of pediatric pain services. In a survey by McClain and<br />

colleagues in 2002, more than half of institutions surveyed had


TABLE <strong>130</strong>-1. Responsibilities of an APS<br />

CHAPTER <strong>130</strong> ■ Acute Pain Service 2133<br />

Regional Analgesia Techniques Opioid Based Analgesia Techniques Consultations for Inpatients<br />

Continuous epidural infusions<br />

Follow-up after intrathecal<br />

opioids<br />

Continuous peripheral nerve<br />

block infusions<br />

Follow-up after single-shot<br />

peripheral nerve block<br />

Patient-controlled analgesia (PCA)<br />

PCA by proxy (nurse- or parent-controlled PCA)<br />

Continuous opioid infusions<br />

Weaning schedules for patients on opioids and<br />

other sedatives<br />

Intensive care unit patients<br />

Trauma patients with multiple injuries<br />

Burn patients<br />

Hematology/oncology/rheumatology,<br />

abdominal pain, miscellaneous<br />

physician-directed pain services. 7 Nurse-directed services had a<br />

physician advisor. Physician certification in pain management was<br />

not commonly found among the pediatric APSs.<br />

Anesthesiologists have a specialized and specific knowledge of<br />

neurophysiology, pharmacology, anatomy, and pathophysiology,<br />

and perform many of the techniques used for postoperative care<br />

in the operating room; they plan intraoperative analgesia regimens<br />

with an eye towards optimizing postoperative analgesia. Anesthe -<br />

siolo gists are also excellent liaisons between surgery, nursing,<br />

pharmacy, and families. However, in many institutions, physicians<br />

from other specialties (e.g., rheumatology, pediatrics) that have a<br />

particular interest in pain management function as the APS<br />

director.<br />

PERSONNEL<br />

Each institutions will need to determine an approach that is most<br />

practical and beneficial given its resources. Certain elements<br />

should always be present.<br />

Physicians<br />

There should be at least one physician with an interest in acute<br />

pain management involved in the APS. This person may be an<br />

anesthesiologist, pediatrician, or other pediatric subspecialist<br />

with an interest in pain management. Additional physicians<br />

are usually needed to assist with communication, development,<br />

and institution of policies and procedures, education of nurses,<br />

physicians, and other health care providers, and day-to-day patient<br />

management.<br />

Nurses<br />

TABLE <strong>130</strong>-2. Goals of the APS<br />

Optimize pain management<br />

Choose the most appropriate pain assessment tools<br />

Maximize multimodal approach to pain management<br />

Minimize and treat side effects of medications<br />

Develop safe and effective protocols and guidelines<br />

Educate health care providers, patients, and families<br />

Monitor outcomes and develop quality improvement programs<br />

Communicate with surgeons, pediatricians, and other members<br />

of health care team<br />

Nurses may serve as the backbone of the service, helping to ensure<br />

appropriate and timely follow-up of procedures, policies, and<br />

physician orders. They are often the primary resource for educating<br />

floor nurses and other health care providers and communicating<br />

with team members.<br />

Physician’s Assistants and<br />

Advanced Practice Nurses<br />

Physician’s assistants or advance practice nurses can assist with<br />

more efficient functioning of an APS. As the demand on physicians<br />

increases, the physician’s assistant or advanced practice nurse<br />

can help with much of the daily management of these patients with<br />

input from the APS physicians.<br />

PAIN ASSESSMENT<br />

Pain is a subjective experience, and neonates, infants, and young<br />

children do not have the ability or vocabulary to describe their<br />

pain. Older children with developmental delays have similar<br />

limitations. In the past this has lead to under treatment and<br />

confusion. There are now many measurement instruments available<br />

that have extensively studied and validated in children of<br />

different ages, developmental abilities, and cultures. However, the<br />

sheer number of scales can add to the confusion of comparing the<br />

efficacy of treatment modalities. The APS’s first task is to determine<br />

which scales or evaluation tools work best within their<br />

institution and to work with nursing to ensure timely and accurate<br />

use of these scales. Appendix 1 provides some examples of commonly<br />

used assessment tools.<br />

MODALITIES<br />

Pharmacodynamics and pharmacokinetics of medication vary<br />

with age and development. Hepatic enzyme systems and renal<br />

clearance are not mature in neonates, and may lead to the<br />

accumulation of drugs or their metabolites. Children from 2 to<br />

6 years of age have more-rapid drug clearance that can require<br />

more frequent dosing. There are differences in body composition<br />

that change with age. 8 Neonates have greater total body water<br />

content than older children and adults, a higher percentage of<br />

highly perfused tissue (e.g., brain, heart), and decreased plasma<br />

binding proteins such as albumin and alpha-1 acid glycoprotein.<br />

These variations can make neonates more susceptible to toxicity<br />

and adverse side effects. (See <strong>Chapter</strong>s 17 and 18)<br />

Nonopioid Analgesics<br />

The nonopioid analgesics are a heterogeneous group of drugs<br />

that exert their effect by inhibiting peripheral prostaglandin<br />

production. The majority of these medications are administered


2134 PART 6 ■ Specific Considerations<br />

orally, although rectal and parenteral preparation of some are<br />

available. 8<br />

Acetaminophen (paracetamol) is the most commonly used<br />

mild analgesic in children. It has a well-established safety profile<br />

and can be used by itself for mild pain 9 or as an adjuvant for<br />

moderate to severe pain. It has few contraindications and few drug<br />

interactions. It is not an anti-inflammatory drug and so lacks the<br />

adverse events associated the nonsteroidal anti-inflammatory<br />

drugs (NSAIDs). The primary mechanism of action is on centrally<br />

mediated cyclooxygenases and has weak peripheral effects. 10 An<br />

overdose of acetaminophen can result in hepatic injury or failure.<br />

Acetaminophen is available as both an oral and rectal preparation.<br />

An intravenous form of the pro-drug propacetamol has been<br />

available in Europe for many years. It has the advantages of a more<br />

rapid onset, opioid sparing, and minimal side effects; however,<br />

it causes burning at the site of injection in a large number of<br />

patients. Recently, an intravenous form of acetaminophen has<br />

been developed that has decreased side effects and appears to be<br />

as effective as propacetamol. 11,12 In a multi-institutional study,<br />

intravenous infusions of acetaminophen reduced the morphine<br />

requirements after major orthopedic surgery by one third. 13<br />

NSAIDs are cyclooxygenase (COX) inhibitors. There are<br />

several isoforms of the COX enzymes. COX-1 is constitutive and<br />

is present and protective in the gastrointestinal (GI) mucosa, the<br />

brain, the kidneys, and on platelets. Inhibition of COX-1 subtypes<br />

by NSAIDs can therefore result in gastric irritation, decreased<br />

renal blood flow, and inhibition of platelet adhesion. COX-2<br />

enzymes are inducible and primarily expressed after an inflammatory<br />

insult. They are found in great concentration in the brain<br />

and spinal cord. Arachidonic acid, which is metabolized by COX<br />

enzymes to prostaglandin-G2, is the primary precursor to the<br />

various prostanoids, which are responsible for pain and inflammation<br />

and also appear to play a role in central sensitization.<br />

Although most available NSAIDs for use in children are COX-1<br />

inhibitors, COX-2 (coxib) drugs, which are more selective and act<br />

peripherally and centrally to modulate inflammation and pain, are<br />

also available in oral dosage forms suitable for larger children and<br />

in intravenous form (ketorolac). They exhibit a lower incidence<br />

of GI bleeding and renal insufficiency. Doses for commonly used<br />

nonopioid medications are listed in Table <strong>130</strong>–3.<br />

Ketorolac is the only currently available intravenous NSAID in<br />

the United States (intravenous diclofenac is available in the United<br />

TABLE <strong>130</strong>-3. Dosage Guidelines for Commonly<br />

Used Nonopioid Drugs<br />

Drug Dose and Route Maximum Dose<br />

Acetaminophen<br />

Aspirin*<br />

Ibuprofen<br />

Naproxen<br />

Ketorolac<br />

Celecoxib<br />

Indomethacin<br />

10–15 mg/kg q3–4h p.o<br />

40 mg/kg loading rectal<br />

dose followed by<br />

20 mg/kg q6h<br />

15 mg/kg I.V. up to<br />

1 gm/dose q6h<br />

10–15 mg/kg q3–4h p.o<br />

10 mg/kg q6–8h p.o<br />

5 mg/kg b.i.d p.o<br />

0.5 mg /kg q6h mg<br />

2–4 mg/kg b.i.d.<br />

0.3–1 mg/kg q6h<br />

p.o. = per os; q = every; b.i.d = twice a day.<br />

*rarely used in pediatrics<br />

100 mg/kg/day<br />

4000 mg in adults<br />

4000 mg<br />

2400 mg<br />

1500 mg<br />

30 mg<br />

150 mg<br />

TABLE <strong>130</strong>-4. Common Side Effects of Nonopioid<br />

Analgesics<br />

Drug<br />

Acetaminophen<br />

Aspirin*<br />

COX-1 inhibitors<br />

Ibuprofen<br />

Naproxen<br />

Ketorolac**<br />

Indomethacin<br />

COX-2 inhibitor<br />

Celecoxib<br />

Kingdom and Europe). It is reported to have potency similar to<br />

that of 0.1 mg/kg of morphine. Ketorolac has been shown to<br />

decrease renal blood flow and inhibit renal prostaglandins. It has<br />

caused acute, although usually reversible, renal failure in both<br />

pediatric and adult patients. 14,15 As a result of these and other case<br />

reports and of animal data, it is probably prudent to limit the use<br />

of ketorolac to 48 to 72 hours. If needed for longer courses of<br />

therapy, renal function should be monitored. Ketorolac seems<br />

to have a greater impact on intraoperative and postoperative<br />

bleeding compared to other NSAIDs, particularly in tonsillectomy<br />

patients. 16 Ketorolac has been shown to be a superior treatment<br />

for bladder spasms as compared to opioids. 17 Common side effects<br />

for the nonopioid analgesics are listed in Table <strong>130</strong>–4.<br />

Opioids<br />

Side Effects<br />

No anti-inflammatory effect<br />

Overdose results in hepatic toxicity<br />

Antiplatelet effects<br />

Associated with Reye syndrome in children<br />

Gastrointestinal irritability<br />

CNS—confusion, dizziness, headache<br />

Cardiac—premature closure of patent<br />

ductus arteriosus, increased risk of<br />

myocardial infarction in adults<br />

Pulmonary—bronchospasm, RAD<br />

Gasrotintestinal—nausea and vomiting,<br />

dyspepsia, diarrhea, gastric ulcers,<br />

bleeding, irritable bowel syndrome<br />

Renal—salt and water retention, interstitial<br />

nephritis, ATN, nephritic syndrome,<br />

HTN, decreased renal filtration, renal<br />

failure, hypokalmia<br />

Increased myocardial infarction in adults<br />

All of the above can occur<br />

COX = cyclooxygenase; RAD = reactive airway disease; ATN = acute tubular<br />

necrosis; HTN = hypertension. Adapted from Anderson CTM, Polaner DM.<br />

Pediatric pain management. In: Holtzman RS, Mancuso TJ, Polaner DM, editors.<br />

A Practical Approach to Pediatric Anesthesia. Philadelphia, PA: Wolters<br />

Kluwer/Lippincott William & Wilkins; 2010, p. 152–169.<br />

*Rarely used in children.<br />

**Limit use to 72 hours.<br />

Opioids provide stronger pain relief than nonopioid analgesics,<br />

but also may have more significant side effects. There are several<br />

opioid receptors and subtypes, primarily the mu (µ) (named<br />

because it is morphine-like), kappa (κ) and delta (δ) receptors.<br />

These receptors are found primarily in the brain and spinal cord,<br />

although some exist in the peripheral nerve cells and other sites.<br />

Commonly used medications may be agonists or partial agonists<br />

at the opioid receptors. Antagonist of these receptors will reverse<br />

all or some of the effects in a dose dependant manner. Morphine<br />

is the “gold standard” for opioids, and potency of the other opioids<br />

is commonly expressed in morphine equivalents in order to enable


CHAPTER <strong>130</strong> ■ Acute Pain Service 2135<br />

TABLE <strong>130</strong>-5. Common Side Effects of Opioids<br />

Respiratory depression<br />

Nausea and vomiting<br />

Pruritus<br />

Sedation, dysphoria, hallucinations<br />

Constipation<br />

Urinary retention<br />

Hyperalgesia<br />

Chest wall rigidity, myoclonus, bronchoconstriction<br />

comparisons between drugs. Opioids all have common side<br />

effects, although the severity and incidence may differ with the<br />

different types of drugs and from person to person. Common side<br />

effects are listed in Table <strong>130</strong>–5.<br />

All opioids have to reach their target site by either direct action<br />

(epidural or intrathecal) or via the blood stream. In order for drugs<br />

to reach the CNS, they need to cross the blood–brain barrier. The<br />

blood–brain barrier may be more immature in neonates and young<br />

infants. The cytochrome P450 systems in the liver are required to<br />

metabolize many of the commonly used opioids prior to excretion.<br />

The liver and P450 system do not reach mature levels until 3 to<br />

6 months of age. The clearance of morphine is 3 to 5 times slower<br />

in infants younger than 6 months of age. This difference can lead<br />

to accumulation and increase in side effects. Children younger<br />

than 6 months of age should be closely monitored when they are<br />

started on opioids. Opioids can be administered by a variety of<br />

routes, including orally, intravenously, transdermally, subcutaneously,<br />

intramuscularly, transbuccally, and intranasally. The most<br />

commonly used routes in the APS patient are oral, intravenous,<br />

and occasionally transdermal. The intramuscular and subcutaneous<br />

routes are rarely used in children.<br />

Oral Opioids<br />

Oral opioids have traditionally been considered “weaker” analgesics,<br />

but the development of new more potent agents challenges<br />

that concept. Since many drugs are available in multiple formulations<br />

(with/without acetaminophen, immediate action/sustained<br />

release) and have limited data in children, careful consideration<br />

of the risks and benefits of each must be taken. Commonly used<br />

oral opioids in children include hydrocodone and oxycodone.<br />

Other opioids that are available in an oral form include morphine,<br />

hydromorphone, methadone, tramadol, and transbuccal fentanyl.<br />

Morphine is available in several oral forms. The immediate<br />

onset form, available in both tablet and elixir preparations, has an<br />

effective duration of action of 3 to 4 hours and due to bioavailability<br />

issues is usually dosed at about three times the intravenous<br />

dose. Sustained release preparations are also available, with a<br />

duration of action of about 8 to 12 hours. Available dosage preparations<br />

limit the use of this form to children over about 20 kg.<br />

The sustained release preparation has less utility in the management<br />

of acute postoperative pain, but can be utilized for children<br />

whose operations, such as Nuss bar insertions for pectus excavatum,<br />

produce pain of longer duration. Like sustained release<br />

oxycodone (discussed below) this drug requires less time and<br />

difficulty to titrate to steady state than methadone.<br />

Codeine is a traditionally prescribed oral opioid, but is actually<br />

a pro-drug that has to be metabolized to morphine in the liver.<br />

Ten percent to 15% of people are unable to effectively demethylate<br />

codeine to its active form and will therefore experience limited or<br />

no analgesia. 18 A small percentage of patients are extensive<br />

demethylators and convert a much higher amount to the active<br />

form, thereby risking toxicity. Because of these problems, codeine’s<br />

use is discouraged.<br />

Unlike codeine, hydrocodone and oxycodone seem to have a<br />

lower incidence of nausea and vomiting and do not require<br />

metabolism to have their effect. They are available in both an elixir<br />

or tablet form, often in a fixed combination with acetaminophen.<br />

It is always prudent with fixed combinations to calculate the<br />

amount of acetaminophen being administered, particularly when<br />

doses need to be escalated, to avoid acetaminophen toxicity.<br />

Oxycodone is also available as a sustained release formulation that<br />

is especially useful for pain of prolonged duration. 19,20 It has a<br />

relatively rapid onset, little peak effect, and duration of action of<br />

about 12 hours. Because it is not made in a pediatric-specific<br />

preparation, its use is generally limited to children weighing more<br />

than 30 to 40 kg and may be given in combination with its short<br />

acting form to provide both basal analgesia and rescue doses for<br />

episodes of acute increased pain.<br />

Meperidine (pethidine) should not be used for repeated dosing<br />

in children because the risk of neurologic side effects from its<br />

metabolite normeperidine. Other useful oral opioids are described<br />

in Table <strong>130</strong>–6.<br />

Parenteral Opioids<br />

Parenteral opioids are used when the patient is unable to take oral<br />

medications. Although the oral route can be equally effective even<br />

after major surgeries, the rapidity of analgesic onset via the<br />

parenteral route may make it preferable in some circumstances, and<br />

patient-controlled analgesia techniques (PCA) may permit improved<br />

titration of drug to need. The APS may spend a significant<br />

portion of their time assessing, caring for, and managing these<br />

patients. Several modes of administration are common in pediatric<br />

patients. These include intermittent I.V. doses, continuous infusions,<br />

and patient controlled analgesia. The advantages and<br />

disadvantages of each technique are listed in Table <strong>130</strong>–7. Although<br />

continuous infusions are commonly used in the intensive care unit<br />

and intermittent dosing may be used to treat intermittent pain, PCA<br />

is most commonly employed by the APS for a variety of patients.<br />

PCA has become a routine and popular technique for providing<br />

analgesia with a minimum of side effects. 21 Most developmentally<br />

normal children older than 5 years of age who do not<br />

have any physical limitations that prevent them from operating<br />

the device can successfully operate PCA. A microprocessorcontrolled<br />

pump allows the physician to set dose and frequency at<br />

which a dose of the drug is delivered. A background infusion can<br />

be used with the demand dose to maintain an even blood level.<br />

A larger bolus dose is usually provided for the nurse to administer<br />

prior to potentially more painful procedures (getting up to walk<br />

for the first time, physical therapy) or for rescue from inadequate<br />

analgesia. Although studies in adults indicate the use of background<br />

infusions to be unnecessary and to increase side effects,<br />

the data in children are conflicting. Early studies by Doyle and<br />

colleagues indicate that a background infusion is associated with<br />

better sleep in the first 24 hours after lower abdominal surgery,<br />

while this could not be confirmed by Kelly et al. 22,23<br />

PCA by proxy is designed to allow younger, sicker, and developmentally<br />

or physically impaired patients to benefit from PCA<br />

technology. A family member or nurse is designated as the proxy


2136 PART 6 ■ Specific Considerations<br />

TABLE <strong>130</strong>-6. Commonly Used Oral Opioids in Children<br />

Approximate Potency<br />

Drug Dose Relative to I.V. Morphine* Comments<br />

Morphine<br />

Codeine<br />

Hydrocodone<br />

Oxycodone<br />

Hydromorphone<br />

Methadone<br />

Fentanyl (oral<br />

transmucosal dose)<br />

Tramadol<br />

Oxymorphone<br />

0.3 mg/kg q3–4h<br />

0.5–1 mg/kg q4–6h<br />

0.1 mg/kg q3–4h<br />

0.1–0.15 mg/kg<br />

0.04–0.08 mg/kg q4–6h<br />

0.2 mg/kg q6–12h<br />

10–15 µg/kg q4h<br />

1–2 mg/kg q4–6h<br />

0.03 mg/kg q4–6h<br />

2–3:1<br />

12:1<br />

1–3:1<br />

1–3:1<br />

0.8:1<br />

2:1 (acute)<br />

100:1<br />

4:1<br />

30:1<br />

Hepatic metabolism, renal excretion<br />

Pro-drug, must be converted to morphine<br />

for effect<br />

Usually founding combination with<br />

acetaminophen<br />

With or without acetaminophen<br />

Sustained release tab is dosed q12h<br />

Minimal renal excretion, safe for patients<br />

with renal insufficiency. Long-acting oral<br />

formulation available for adult chronic<br />

pain patients<br />

Long half-life causes accumulation after<br />

2–3 days requiring longer dosing intervals<br />

Short half-life, effective for short painful<br />

procedure or breakthrough pain<br />

Partial agonist<br />

Both immediate release and extended<br />

release available 47<br />

No studies in children<br />

q = every.<br />

and activate the button for additional demand doses of pain<br />

medication. There have been several fatalities associated with both<br />

PCA and PCA by proxy in adults, although none have been<br />

reported in children. The Joint Commission on Accreditation of<br />

Healthcare Organizations (JCAHO) issued a “Sentinel Alert”<br />

alerting the medical community to potential dangers of PCA by<br />

proxy. 24 Two retrospective studies in children, however, 25,26 have<br />

confirmed that although the PCA by proxy is often used in<br />

younger patients or patients with greater comorbidities, the<br />

incidence of adverse events is similar to that of PCA. Krane, in an<br />

excellent editorial, emphasizes that the key points to making PCA<br />

by proxy safe in children are: careful patient selection, careful<br />

monitoring including electronic monitoring, and setting specific<br />

triggers (pain scores) for activating the button. 27 At the Children’s<br />

Hospital of Denver, we have added detailed education programs<br />

for both nurses and family members, stressing the importance of<br />

never activating the PCA demand dose when the patient is<br />

sleeping or sedated.<br />

TABLE <strong>130</strong>-7. Advantages and Disadvantages of Parenteral Modes of Opioid Administration<br />

Advantage<br />

Disadvantage<br />

Intermittent administration<br />

Continuous infusions<br />

Patient-controlled analgesia<br />

(PCA)<br />

PCA by proxy<br />

Cheap<br />

Easy to administer<br />

Works well when pain is intermittent<br />

Effective in ventilated patients, infants, and small<br />

children<br />

Drugs can be titrated and boluses for<br />

breakthrough can be prescribed<br />

On-demand, individualized small doses at<br />

intervals determined by patient<br />

Lockout prevents dosing before peak effect of<br />

previous dose<br />

Oversedation minimizes patients ability to<br />

demand too many doses<br />

With appropriate training, patient selection and<br />

protocols, parent or nurse can provide superior<br />

analgesia to scheduled intermittent dosing 25<br />

Safe and effective when done correctly<br />

Peak and valley blood levels<br />

Increased incidence of side effects<br />

Inadequate periods of analgesia when<br />

pain is continuous<br />

Requires a nurse to administer, leading<br />

to delays in analgesia<br />

Requires careful monitoring for side<br />

effects<br />

Under- or overtreatment may be difficult<br />

to avoid<br />

Costly equipment required<br />

Pump malfunction rare but possible<br />

Easier to divert or overuse medications<br />

since nursing intervention not required<br />

with each dose<br />

Requires education and follow-up<br />

May still have higher incidence of<br />

respiratory events 26


TABLE <strong>130</strong>-8. Commonly Used Doses of Parenteral Opioids<br />

CHAPTER <strong>130</strong> ■ Acute Pain Service 2137<br />

Intermittent Bolus Continuous Patient-Controlled<br />

Drug or Loading Dose Infusion Analgesia Dosing<br />

Morphine<br />

Fentanyl<br />

Hydromorphone<br />

Methadone<br />

50–100 µg/kg q2–4h<br />

0.5–2 µg/kg q1–2h<br />

15 ug/kg<br />

0.1 mg/kg q6–12h<br />

10–40 µg/kg/h<br />

0.5–2 µg/kg/h<br />

2–6 ug/kg/h<br />

N/A<br />

Demand dose: 10–20 µg/kg<br />

Infusion: 0–20 µg/kg<br />

Bolus: 50–100 µg/kg q2–4 hrs<br />

Lockout: 6–10 mins<br />

Demand dose: 0.1–0.2 µg/kg<br />

Infusion: 0.1–0.2 µg/kg/h<br />

Bolus: 0.5–1 µg/kg q1–2h<br />

Lockout: 6–8 min<br />

Demand dose: 1.5–3 µg/kg<br />

Infusion: 1.5–3µg/kg/h<br />

Bolus: µg/kg q1–2h<br />

Lockout: 6–8 min<br />

N/A<br />

Regional Analgesia<br />

Regional analgesia in children has become increasingly popular. It<br />

is safe, adaptable and effective. For many APSs, the majority of<br />

their time will be spent assessing, monitoring, and troubleshooting<br />

patients with regional anesthesia.<br />

The majority of regional blocks are placed under deep sedation<br />

or general anesthesia, so it is of utmost importance for the APS to<br />

determine the efficacy of the block as soon as possible. The need<br />

for additional medication and potential complications should be<br />

considered. The APS will usually check dermatomes (in the case<br />

of an epidural) or sensation in the affected region, check for motor<br />

function, and assess the child for pain. The availability of multiple<br />

combinations of local anesthetics, opioids, and adjuvant agents<br />

for epidural use can allow the establishment of different physiologic<br />

effects. One must counterbalance the benefit of less<br />

motor blockade with higher-concentration local anesthetics<br />

against the potential disadvantage of breakthrough pain with low<br />

TABLE <strong>130</strong>-9. Advantages and Disadvantages of<br />

Regional Analgesia<br />

Advantages<br />

Decreased stress response<br />

Improved analgesia<br />

Improved gastrointestinal<br />

function<br />

Earlier return to oral<br />

intake<br />

Less sedation<br />

Attenuation of phantom<br />

limb sensations and pain<br />

May decrease blood loss<br />

in vascular surgery cases<br />

Can decrease the incidence<br />

of thromboembolic<br />

phenomenon in high<br />

risk patients<br />

Disadvantages<br />

Takes time and skill to place<br />

Infection or bleeding at site<br />

Partial or patchy analgesia<br />

Leaking or bleeding catheters<br />

Motor block<br />

Nausea and vomiting, pruritus,<br />

urinary retention and respiratory<br />

depression may still occur<br />

with the use of epidural opioids<br />

Rare nerve injury<br />

concentration agents. Similarly, a multimodal approach adding<br />

central neuraxial opioids may enhance analgesia but at the<br />

potential risk of increasing nausea, pruritus, and respiratory<br />

depression, and alpha agonists may prolong analgesia but also may<br />

produce more sedation. 28<br />

Ambulatory Nerve Blocks<br />

Continuous peripheral nerve blocks (CPNBs) have been shown<br />

to treat pain more effectively than systemic analgesics and may<br />

cause fewer side effects than epidural analgesic techniques. 29<br />

Single-shot peripheral nerve blocks have been commonly used in<br />

both pediatric and adult practices; however, the advent of<br />

ultrasound has made placing these blocks easier, safer, and more<br />

effective. 30,31 Dadure et al. found CPNBs using elastomeric pumps<br />

to be safe and easy to place in a small sample of children. 32 Two<br />

hundred twenty-six CPNB catheters were placed in children aged<br />

4 to 18 years, 112 of whom were discharged home. 33 They received<br />

2 to 12 mL of dilute solutions of either bupivacaine or ropivacaine;<br />

side effects occurred in 2.8% of patients and were minor. The<br />

authors credit their success to strict protocols that were developed,<br />

frequent follow-up with patients by the APS, and education of all<br />

the families and nurses in the postanesthesia care unit and on the<br />

surgical floors. The education focused on the infusion pumps,<br />

monitoring, and clinical recognition of potential complications<br />

TABLE <strong>130</strong>-10. Epidural Dosing—Continuous Infusions—<br />

Guidelines<br />

Agents Concentration Infusion<br />

Bupivacaine 0.075%–0.125% 0.15–0.4 mL/kg/h<br />

Ropivacaine 0.075 % 0.2% 0.15–0.4 mL/kg/h<br />

Fentanyl 2–5 µg /mL 0.5–1 µg/kg/h<br />

Morphine (PF) 10 µg /mL 2–10 µg/kg/h<br />

Hydromorphone 3–5 µg/mL 0.3–2 µg/kg/h<br />

Clonidine 0.5–1 µg/mL 1–4 µg/kg/h<br />

The maximum infusion rates should not exceed 0.5 mg/kg/h of bupivacaine or<br />

ropivacaine in children and 0.25 mg/kg/h in neonates. When different concentrations<br />

of local anesthetic solutions are used, the mg/kg/h and mL/kg/h<br />

maximum dose should be recalculated.


2138 PART 6 ■ Specific Considerations<br />

related to both the perineural catheters and the local anesthetic.<br />

Follow-up included frequent phone calls assessing pain, need for<br />

opioids, sedation, and potential complications.<br />

EDUCATION OF FLOOR<br />

NURSES AND PARENTS<br />

Survey and studies reveal that pain is still sometimes inconsistently<br />

and inadequately treated. 34,35 Staff in-services and informational<br />

hand-outs can improve assessment and treatment. Interestingly,<br />

a recent survey showed that pediatric nurses’ attitudes and knowledge<br />

about pain were related not only to their degree of experience<br />

but also their involvement in professional nursing societies<br />

and nursing committees. 36 Ellis et al. showed that comprehensive<br />

programs could improve pain management in children, and of<br />

particular importance was the presence and support of the APS<br />

nurse(s) and team. 37<br />

Educating parents is as important as educating nurses. Parents<br />

frequently receive fragmented and unclear information regarding<br />

their children’s postoperative pain management techniques. 38 In a<br />

survey by Tait and Voepel-Lewis, one third of parents had no idea<br />

of the risks of their child’s postoperative pain management.<br />

SURGEONS AND PLANNING FOR<br />

POSTOPERATIVE ANALGESIA<br />

It is important to communicate with the surgeon when deciding<br />

on the modality for postoperative analgesia. One must know the<br />

nature of the operation, the planned duration of the hospital stay,<br />

and any special requirements that the surgeon may have in mind<br />

for postoperative care and management. Since many operations<br />

will have a somewhat regimented postoperative care plan, it is<br />

TABLE <strong>130</strong>-11. Troubleshooting Common Epidural<br />

Problems<br />

Problem<br />

Inadequate pain<br />

relief<br />

Persistent motor<br />

block<br />

Pruritus and/or<br />

vomiting<br />

Diagnosis and Treatment<br />

Confirm position and patency of catheter<br />

Assess dermatomes if possible<br />

Consider bolus (calculate toxic dose)<br />

Change concentration or composition of<br />

epidural solution<br />

Small additional doses of opioids or other<br />

analgesics are commonly required in<br />

young children to improve overall<br />

“comfort”<br />

Epidurogram can help diagnose catheter<br />

problems<br />

Stop infusion for 1 hour and resume at<br />

lower concentration<br />

If no improvement after several hours<br />

consider magnetic resonance imaging<br />

to rule out epidural hematoma<br />

Nalbuphine 0.05 mg/kg q4h<br />

Naloxone infusion 0.25–0.5 ug/kg/h 48<br />

Decrease infusion if patient has good pain<br />

control<br />

Ondansetron<br />

both efficient and practical to develop analgesic care plans to<br />

complement the operation and the surgeon’s preferences. By<br />

working with the surgeon, a cooperative plan for postoperative<br />

analgesia that incorporates the expertise of the anesthesiologist<br />

can be decided upon in advance and implemented as a routine for<br />

a given procedure. Standardization of these care plans (with the<br />

obvious ability to make alterations based on the clinical circumstance)<br />

will help ensure consistency of care and avoid errors.<br />

Criteria that are particularly important to consider include:<br />

●<br />

●<br />

●<br />

●<br />

What is the duration of the patient’s stay after surgery? Will the<br />

patient be admitted overnight, for several days, or be discharged<br />

home from the PACU? If a same day procedure is planned, for<br />

example, the use of central neuraxial opioids is contraindicated.<br />

Neural blockade with a long acting local anesthetic may work<br />

well in that situation, and ambulatory continuous regional<br />

blockade is becoming more commonly used for procedures of<br />

the extremities.<br />

What is the expected duration of pain? For procedures that are<br />

expected to have prolonged analgesic needs during recover, the<br />

use of long acting oral opioids such as sustained release preparations<br />

may be considered and instituted early.<br />

Are there specific needs for postoperative assessment? The surgeon<br />

operating near a neural plexus may have concerns about<br />

motor and sensory function that might preclude the use of regional<br />

analgesia, or may wish for the patient to ambulate early,<br />

mandating very low concentrations of local anesthetics to avoid<br />

motor blockade.<br />

Will the patient be able to take oral medications immediately, or<br />

will regional or parental drugs be required?<br />

EXPECTANT/EMERGENT<br />

MANAGEMENT OF COMPLICATIONS<br />

There are certain untoward side effects that can be anticipated for<br />

the various analgesic modalities. Understanding the nature and<br />

incidence of these effects can help the physician chose the most<br />

appropriate analgesic technique for a given patient and situation.<br />

Furthermore, anticipating some of these problems can permit the<br />

APS to develop protocols to mitigate their manifestations and<br />

increase the efficiency of how they are managed. 39 Two recent large<br />

prospective audits from the United Kingdom, one on epidural<br />

anesthesia and a second on opioids, have demonstrated the great<br />

degree of safety that these modalities enjoy in children, but also<br />

point out the nature of risk and complications. 40<br />

Regional Analgesia and Local Anesthetics<br />

Excessive motor block is the most common untoward effect of<br />

regional analgesia. The primary risk is weakness of an extremity<br />

and injury to an unprotected limb. Lack of movement can produce<br />

a pressure injury. Skin necrosis or pressure sores can develop, or<br />

pressure on a peripheral nerve, especially if located adjacent to a<br />

boney prominence, can result in sensory or motor neuropathy.<br />

Careful monitoring of motor function and padding and positioning<br />

of an affected limb can prevent such potentially serious<br />

complications should motor weakness be detected. The local<br />

anesthetic concentration must be reduced or the infusion stopped<br />

until the motor block resolves. Assessment with the Bromage<br />

Score (Table 12) should be performed at regular intervals when<br />

the nurse measures the vital signs. New onset of dense motor block


CHAPTER <strong>130</strong> ■ Acute Pain Service 2139<br />

TABLE <strong>130</strong>-12. Modified Bromage Score for Assessing<br />

Motor Blockade<br />

Score: 0 1 2<br />

Motor<br />

response<br />

in a patient with an epidural infusion may be a sign that the<br />

catheter has eroded through the dura into the subarachnoid space.<br />

Local anesthetic toxicity can be prevented by careful attention<br />

to drug dosing. Maximal infusion rates for bupivacaine should not<br />

exceed 0.5 mg/kg/h. Although there is an increased margin of<br />

safety with levoenantiamer amides such as ropivacaine or<br />

levobupivacaine, the authors recommend using similar limits for<br />

those drugs. Infants younger than 6 months of age are especially<br />

at risk of local anesthetic accumulation and toxicity due to their<br />

decreased levels of alpha-1 acid glycoprotein; their maximal<br />

infusion rate should be reduced by about 25% and a levoenantiamer<br />

should be used instead of racemic bupivacaine. Alternatively,<br />

2,3 chloroprocaine, an ester local anesthetic with little risk<br />

of accumulation, may be used instead of an amide. 41,42<br />

Early signs of local anesthetic toxicity include restlessness and<br />

somnolence. CNS irritability may herald the onset of seizures,<br />

which can rapidly be followed by cardiovascular collapse. Treatment,<br />

in addition to stopping the infusion and the institution of<br />

supportive measures, is immediate infusion of 1 mL/kg of 20%<br />

intravenous lipid emulsion, with additional 1 mL/kg doses (up to<br />

3 mL/kg) until the child is stabilized. 43–45<br />

Inadequate analgesia demands investigation. This is especially<br />

so if the block appeared to be working previously. Possible<br />

explanations include dislodgement of the catheter, misplacement<br />

of the catheter, inadequate infusion volume, inappropriate catheter<br />

placement for the analgesic need, and inappropriate choice of<br />

drug. Anatomic variations may also produce inadequate analgesia,<br />

for example, unilateral epidural blockade due to septation of the<br />

epidural space. It is never appropriate to simply increase the<br />

infusion rate unless it can be clearly demonstrated that the catheter<br />

is in the correct location. Injection of a small volume of nonionic<br />

contrast into the catheter can visually confirm its location.<br />

Catheter dislodgement should be suspected when a previously<br />

effective regional block suddenly is ineffective. These small<br />

catheters are often difficult to secure. The authors suggest the use<br />

of a clear adhesive dressing in conjunction with an adhesive agent<br />

such as Mastisol or tincture of benzoin. The catheter should be<br />

looped under the dressing to provide a strain relief so that if it is<br />

pulled on it will tend to shorten the loop rather than directly pull<br />

on and dislodge the catheter from its insertion site. We also<br />

recommend that the site of entry always be visible. This permits<br />

inspection of the position of the catheter (they commonly have<br />

centimeter markings) and of the skin for signs of infection. The<br />

vast majority of infections probably originate at the insertion site,<br />

and signs of local infection are grounds for catheter removal. 46<br />

Opioids<br />

No evidence of<br />

motor block,<br />

able to lift<br />

extremity to<br />

gravity<br />

Able to move<br />

extremity, but<br />

cannot sustain<br />

lift against<br />

gravity<br />

Unable to<br />

move<br />

extremity<br />

These drugs can produce several undesirable effects that can be<br />

troubling even when mild. Either small doses of nalbuphine, a<br />

mixed agonist–antagonist (0.05 mg/kg/dose q4h), or low-rate<br />

infusions of naloxone (0.25–1 µg/kg/h) have been shown to be<br />

effective in combating the various side effects of both central<br />

neuraxis and systemic opioids. Except for the histamine-induced<br />

pruritus caused by systemically-administered morphine, we<br />

usually prefer to use an opioid antagonist as our initial therapy for<br />

opioid side effects.<br />

Respiratory depression occurs to some degree with all opioids.<br />

Close monitoring of mental status, respiratory rate, and respiratory<br />

depth is mandatory when parenteral or central neuraxial<br />

opioids are administered. Pulse oximetry, while useful and<br />

encouraged, is not a panacea because desaturation is a relatively<br />

late sign. Impedence respirometry, the technology employed by<br />

most cardiorespiratory monitoring devices, measures chest wall<br />

excursion, not actual aeration, and may register an adequate<br />

respiratory rate when a child’s airway is partially obstructed and<br />

alveolar ventilation is impaired. Thus, close and frequent nursing<br />

observation is mandatory for these patients and cannot be<br />

supplanted by electronic devices.<br />

With central neuraxial administration, respiratory depression<br />

is more common with the hydrophilic compared with lipophilic<br />

opioids. Since the lipophilic drugs cross cell membranes more<br />

readily and bind to receptors in the substantia gelatinosa of the<br />

spinal cord, rostral spread is less likely with fentanyl than with<br />

morphine or hydromorphone, but still may occur, especially with<br />

higher doses or in susceptible patients. Delayed respiratory<br />

depression is especially a risk with intrathecal (and even epidural)<br />

morphine, and may not present until 10 to 16 hours after the initial<br />

administration of the drug.<br />

Nausea and vomiting can be produced by any opioid via any<br />

route. It can be treated with the usual antiemetic therapies such as<br />

5-HT3 antagonists (ondansetron), or by more directed approaches<br />

using opioid antagonists described above.<br />

Pruritus is a common and unpleasant side effect, and except<br />

in the case of systemically administered morphine, is generally not<br />

caused by histamine release but rather is thought to be centrally<br />

mediated via the µ receptor. We generally prefer to treat with an<br />

opioid antagonist or a mixed agonist–antagonist. Antihistamines<br />

such as diphenhydramine (0.5 mg/kg) can be used for patients<br />

on systemic morphine, but their potential for sedation must be<br />

born in mind in these patients who are already receiving CNS<br />

depressants.<br />

QUALITY ASSURANCE<br />

AND IMPROVEMENT<br />

In order to improve the performance of APS practices, it is<br />

important to track both efficacy and complications. These data<br />

should be reviewed at regular intervals in order to detect trends.<br />

It is similarly important for the APS to place daily progress notes<br />

in the patient’s chart in order to communicate management<br />

decisions and clinical findings to the entire patient care team.<br />

REFERENCES<br />

1. Miaskowski C, Crews J, Ready LB, et al. Anesthesia-based pain services<br />

improve the quality of postoperative pain management. Pain. 1999;80:<br />

23–29.<br />

2. Lonnqvist PA, Morton NS. Postoperative analgesia in infants and<br />

children. Br J Anaesth. 2005;95:59–68.<br />

3. Marhofer P, Frickey N. Ultrasonographic guidance in pediatric regional<br />

anesthesia. Part 1: theoretical background. Paediatr Anaesth. 2006;16:<br />

1008–1018.


2140 PART 6 ■ Specific Considerations<br />

4. Mariano ER, Ilfeld BM, Cheng GS, et al. Feasibility of ultrasound-guided<br />

peripheral nerve block catheters for pain control on pediatric medical<br />

missions in developing countries. Paediatr Anaesth. 2008;18:598–601.<br />

5. Marhofer P. Vertical infraclavicular brachial plexus block in children: a<br />

preliminary study. Paediatr Anaesth. 2005;15:530–531; author reply 531.<br />

6. Yaster M, Kost-Byerly S, Berde C, Billet C. The management of opioid<br />

and benzodiazepine dependence in infants, children, and adolescents.<br />

Pediatrics. 1996;98:135–140.<br />

7. Finley GA, McGrath PJ, Chambers CT. Bringing Pain Relief to Children:<br />

Treatment Approaches. Totowa, NJ: Humana Press, 2006.<br />

8. Berde CB, Sethna NF. Analgesics for the treatment of pain in children.<br />

N Engl J Med. 2002;347:1094–1103.<br />

9. Bhatt-Mehta V, Rosen DA. Management of acute pain in children. Clin<br />

Pharm. 1991;10:667–685.<br />

10. Remy C, Marret E, Bonnet F. State of the art of paracetamol in acute pain<br />

therapy. Curr Opin Anaesthesiol. 2006;19:562–565.<br />

11. Moller PL, Juhl GI, Payen-Champenois C, Skoglund LA. Intravenous<br />

acetaminophen (paracetamol). comparable analgesic efficacy, but better<br />

local safety than its prodrug, propacetamol, for postoperative pain after<br />

third molar surgery. Anesth Analg. 2005;101:90–96.<br />

12. Hernandez-Palazon J, Tortosa JA, Martinez-Lage JF, Perez-Flores D.<br />

Intravenous administration of propacetamol reduces morphine consumption<br />

after spinal fusion surgery. Anesth Analg. 2001;92:1473–1476.<br />

13. Sinatra RS, Jahr JS, Reynolds LW, et al. Efficacy and safety of single and<br />

repeated administration of 1 gram intravenous acetaminophen injection<br />

(paracetamol) for pain management after major orthopedic surgery.<br />

Anesthesiology. 2005;102:822–831.<br />

14. Buck ML, Norwood VF. Ketorolac-induced acute renal failure in a<br />

previously healthy adolescent. Pediatrics. 1996;98:294–296.<br />

15. Witting MD. Renal papillary necrosis following emergency department<br />

treatment of migraine. J Emerg Med. 1996;14:373–376.<br />

16. Gunter JB, Varughese AM, Harrington JF, et al. Recovery and complications<br />

after tonsillectomy in children: a comparison of ketorolac and<br />

morphine. Anesth Analg. 1995;81:1136–1141.<br />

17. Park JM, Houck CS, Sethna NF, et al. Ketorolac suppresses postoperative<br />

bladder spasms after pediatric ureteral reimplantation. Anesth Analg.<br />

2000;91:11–15.<br />

18. Fagerlund TH, Braaten O. No pain relief from codeine...? An introduction<br />

to pharmacogenomics. Acta Anaesthesiol Scand. 2001;45:140–149.<br />

19. Czarnecki ML, Jandrisevits MD, Theiler SC, et al. Controlled-release<br />

oxycodone for the management of pediatric postoperative pain. J Pain<br />

Symptom Manage. 2004;27:379–386.<br />

20. Blumenthal S, Min K, Marquardt M, Borgeat A. Postoperative intravenous<br />

morphine consumption, pain scores, and side effects with perioperative<br />

oral controlled-release oxycodone after lumbar discectomy. Anesth Analg.<br />

2007;105:233–237.<br />

21. McDonald AJ, Cooper MG. Patient-controlled analgesia. an appropriate<br />

method of pain control in children. Paediatr Drugs. 2001;3:273–284.<br />

22. Kelly JJ, Donath S, Jamsen K, Chalkiadis GA. Postoperative sleep disturbance<br />

in pediatric patients using patient-controlled devices (PCA).<br />

Paediatr Anaesth. 2006;16:1051–1056.<br />

23. Doyle E, Harper I, Morton NS. Patient-controlled analgesia with low dose<br />

background infusions after lower abdominal surgery in children. Br J<br />

Anaesth. 1993;71:818–822.<br />

24. The Joint Commission. Patient controlled analgesia by proxy. Sentinel<br />

Event Alert. 2004;33:1–2.<br />

25. Anghelescu DL, Burgoyne LL, Oakes LL, Wallace DA. The safety of<br />

patient-controlled analgesia by proxy in pediatric oncology patients.<br />

Anesth Analg. 2005;101:1623–1627.<br />

26. Voepel-Lewis T, Marinkovic A, Kostrzewa A, et al. The prevalence of and<br />

risk factors for adverse events in children receiving patient-controlled<br />

analgesia by proxy or patient-controlled analgesia after surgery. Anesth<br />

Analg. 2008;107:70–75.<br />

27. Krane EJ. Patient-controlled analgesia. proxy-controlled analgesia? Anesth<br />

Analg. 2008;107:15–17.<br />

28. Ansermino M, Basu R, Vandebeek C, Montgomery C. Nonopioid additives<br />

to local anaesthetics for caudal blockade in children: a systematic<br />

review. Paediatr Anaesth. 2003;13:561–573.<br />

29. Capdevila X, Ponrouch M, Choquet O. Continuous peripheral nerve<br />

blocks in clinical practice. Curr Opin Anaesthesiol. 2008;21:619–623.<br />

30. Ganesh A, Kim A, Casale P, Cucchiaro G. Low-dose intrathecal morphine<br />

for postoperative analgesia in children. Anesth Analg. 2007;104:<br />

271–276.<br />

31. Marhofer P, Sitzwohl C, Greher M, Kapral S. Ultrasound guidance for<br />

infraclavicular brachial plexus anaesthesia in children. Anaesthesia.<br />

2004;59:642–646.<br />

32. Dadure C, Pirat P, Raux O, et al. Perioperative continuous peripheral<br />

nerve blocks with disposable infusion pumps in children. a prospective<br />

descriptive study. Anesth Analg. 2003;97:687–690.<br />

33. Ganesh A, Rose JB, Wells L, et al. Continuous peripheral nerve blockade<br />

for inpatient and outpatient postoperative analgesia in children. Anesth<br />

Analg. 2007;105:1234–1242, table of contents.<br />

34. Barnason S, Merboth M, Pozehl B, Tietjen MJ. Utilizing an outcomes<br />

approach to improve pain management by nurses: a pilot study. Clin Nurse<br />

Spec. 1998;12:28–36.<br />

35. Gimbler-Berglund I, Ljusegren G, Enskar K. Factors influencing pain<br />

management in children. Paediatr Nurs. 2008;20:21–24.<br />

36. Rieman MT, Gordon M. Pain management competency evidenced by a<br />

survey of pediatric nurses’ knowledge and attitudes. Pediatr Nurs. 2007;<br />

33:307–312.<br />

37. Ellis JA, McCleary L, Blouin R, et al. Implementing best practice<br />

pain management in a pediatric hospital. J Spec Pediatr Nurs. 2007;12:<br />

264–277.<br />

38. Tait AR, Voepel-Lewis T, Snyder RM, Malviya S. Parents’ understanding<br />

of information regarding their child’s postoperative pain management.<br />

Clin J Pain. 2008;24:572–577.<br />

39. Ellis JA, Martelli B, LaMontagne C, Splinter W. Evaluation of a continuous<br />

epidural analgesia program for postoperative pain in children. Pain<br />

Manage Nurs. 2007;8:146–155.<br />

40. Llewellyn N, Moriarty A. The national pediatric epidural audit. Paediatr<br />

Anaesth. 2007;17:520–533.<br />

41. Berde C. Local anesthetics in infants and children: an update. Paediatr<br />

Anaesth. 2004;14:387–393.<br />

42. Gunter JB. Benefit and risks of local anesthetics in infants and children.<br />

Paediatr Drugs. 2002;4:649–672.<br />

43. Ludot H, Tharin JY, Belouadah M, et al. Successful resuscitation after<br />

ropivacaine and lidocaine-induced ventricular arrhythmia following<br />

posterior lumbar plexus block in a child. Anesth Analg. 2008;106:1572–<br />

1574, table of contents.<br />

44. Rosenblatt M, Able M, Fischer G, et al. Successful use of a 20% lipid<br />

emulsion to resuscitate a patient after a presumed bupivacaine-induced<br />

cardiac arrest. Anesthesiology. 2006;105:217–218.<br />

45. Weinberg G, Ripper R, Feinstein DL, Hoffman W. Lipid emulsion<br />

infusion rescues dogs from bupivacaine-induced cardiac toxicity. Reg<br />

Anesth Pain Med. 2003;28:198–202.<br />

46. Strafford MA, Wilder RT, Berde CB. The risk of infection from epidural<br />

analgesia in children: a review of 1620 cases. Anesth Analg. 1995;80:<br />

234–238.<br />

47. Gimbel JS. Oxymorphone. a mature molecule with new life. Drugs Today<br />

(Barc). 2008;44:767–782.<br />

48. Maxwell LG, Kaufmann SC, Bitzer S, et al. The effects of a small-dose<br />

naloxone infusion on opioid-induced side effects and analgesia in<br />

children and adolescents treated with intravenous patient-controlled<br />

analgesia: a double-blind, prospective, randomized, controlled study.<br />

Anesth Analg. 2005;100:953–958.<br />

49. Beyer JE, Denyes MJ, Villarruel AM. The creation, validation, and<br />

continuing development of the Oucher: a measure of pain intensity in<br />

children. J Pediatr Nurs. 1992;7:335–346.<br />

50. Wong DL, Baker CM. Pain in children: comparison of assessment scales.<br />

Pediatr Nurs. 1988;14:9–17.<br />

51. Merkel S, Voepel-Lewis T, Malviya S. Pain assessment in infants and<br />

young children: the FLACC scale. Am J Nurs. 2002;102:55–58.<br />

52. Bieri D, Reeve RA, Champion GD, et al. The Faces Pain Scale for the selfassessment<br />

of the severity of pain experienced by children: development,<br />

initial validation, and preliminary investigation for ratio scale properties.<br />

Pain. 1990;41:139–150.


Pain Assessment Tools<br />

1<br />

APPENDIX<br />

Poker Chip Tool. Poker Chips represent “pieces of hurt”, the child determines the amount of “hurt” he/she by indicating the number<br />

of poker chips.<br />

Word Graphic Rating Scale.<br />

________________________________________________________________________________________________________<br />

No Pain Little Pain Medium Pain Large Pain Worst Possible Pain<br />

Eland Color Scale. The child uses colors to indicate the areas that<br />

hurt on a schematic of a child’s body (gender-specific). The child<br />

is allowed to choose which colors represent mild, moderate, and<br />

severe pain (or hurt).<br />

0–10 Scale. As in adults, the child states on a scale of 0–10 what<br />

level their pain is: 0 = no pain and 10 = worst possible pain.<br />

Wong Baker Faces Pain Scale. 50<br />

Oucher Scale. The child is shown photographs of a child with<br />

different facial expressions ranging from calm and relaxed to<br />

screaming. The faces are arranged beside a scale and the child<br />

points to the photograph that represents his degree of pain.<br />

There are White, African American, and Hispanic Ouchers<br />

available. 49


2142 PART 6 ■ Specific Considerations<br />

Bieri Faces Pain Scale. 52<br />

FLACC (Facial expression, Legs, Activity, Cry, Consolability) observational pain scale for nonverbal children. This has been validated in<br />

older children with developmental delays as well as infants. 51<br />

SCORE<br />

FACE<br />

LEGS<br />

ACTIVITY<br />

CRY<br />

CONSOLABILITY<br />

0=No particular expression or smile<br />

1=Occasional grimace/frown, withdrawn or disinterested<br />

2=Frequent/constant quivering chin, clenched jaw<br />

0=Normal position or relaxed<br />

1=Uneasy, restless, tense<br />

2=Kicking, or legs drawn up<br />

0=Lying quietly, normal position, moves easily<br />

1=Squirming, shifting back and forth, tense<br />

2=Arched, rigid or jerking<br />

0=No cry<br />

1=Moans or whimpers; occasional complaint<br />

2=Crying steadily, screams or sobs, frequent complaints<br />

0=Content and relaxed<br />

1=Reassured by occasional touching, hugging or being talked to. Distractible<br />

2=Difficult to console or comfort<br />

0<br />

1<br />

2<br />

0<br />

1<br />

2<br />

0<br />

1<br />

2<br />

0<br />

1<br />

2<br />

0<br />

1<br />

2

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