Chapter 130
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<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