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HOME <strong>CME</strong>/CE INFORMATION PROGRAM DIRECTORS NEWSLETTER ARCHIVE EDIT PROFILE RECOMMEND TO A COLLEAGUE<br />

voLUME 9 — iSSUE 14: TRANScRipT<br />

Featured Cases: Optimizing Nutritional Support with Protein and<br />

Energy for Very Low Birth Weight Infants<br />

Our guest author is David H. Adamkin, Professor of<br />

Pediatrics, Director of the Division of Neonatal<br />

Medicine, and Rounsavall Endowed Chair of<br />

Neonatology at the University of Louisville.<br />

After participating in this activity, the participant will<br />

demonstrate the ability to:<br />

n Describe the importance of starting parenteral<br />

nutrition in the first hours of life, even in the face<br />

of critical illness in VLBW infants,<br />

n Evaluate the role of parenteral amino acids in<br />

glycemic control, as well as lipids in relation to lung<br />

dysfunction, in VLBW infants, and<br />

n Discuss the role of donor-fortified milk in VLBW<br />

infants.<br />

This discussion, offered as a downloadable audio file<br />

and companion transcript, covers the important issues<br />

related to enhancing nutrition in very low birth weight<br />

infants in the format of case-study scenarios for the<br />

clinical practice. This program is a follow up to the<br />

Volume 9, Issue 13 eNeonatal Review newsletter—<br />

Optimizing Nutritional Support with Protein and Energy<br />

for Very Low Birth Weight Infants.<br />

MEET ThE AUThoR<br />

David H. Adamkin, MD<br />

Professor of Pediatrics<br />

Director, Division of Neonatal<br />

Medicine<br />

Rounsavall Endowed Chair of<br />

Neonatology<br />

University of Louisville<br />

Louisville, Kentucky<br />

Guest Faculty Disclosure<br />

The author has indicated that he has no financial<br />

interests or relationships with a commercial entity<br />

whose products or services are relevant to the<br />

content of his presentation.<br />

Unlabeled/Unapproved Uses<br />

The author has indicated that there will be no<br />

references to unlabeled/unapproved uses of drugs<br />

or products.<br />

Release Date<br />

October 31, 2013<br />

Expiration Date<br />

October 30, 2015<br />

pRoGRAM DiREcToRS<br />

Edward E. Lawson, MD<br />

Professor of Pediatrics<br />

Johns <strong>Hopkins</strong> University<br />

School of Medicine<br />

Chief, Division of<br />

Neonatology<br />

Vice Chair, Department of<br />

Pediatrics Johns <strong>Hopkins</strong><br />

Children’s Center<br />

Baltimore, Maryland<br />

Maureen M. Gilmore, MD<br />

Assistant Professor of<br />

Pediatrics<br />

Director of Neonatology<br />

Johns <strong>Hopkins</strong> Bayview<br />

Medical Center<br />

Baltimore, Maryland<br />

Lawrence M. Nogee, MD<br />

Professor<br />

Department of Pediatrics<br />

Division of Neonatology<br />

The Johns <strong>Hopkins</strong><br />

University School of<br />

Medicine<br />

Baltimore, Maryland<br />

Mary Terhaar, DNSc, RN<br />

Assistant Professor<br />

Undergraduate Instruction<br />

The Johns <strong>Hopkins</strong><br />

University School of<br />

Nursing<br />

Baltimore, Maryland<br />

Anthony Bilenki, MA, RRT<br />

Technical Director<br />

Respiratory Care Services<br />

Division of Anesthesiology<br />

and Critical Care Medicine<br />

The Johns <strong>Hopkins</strong><br />

Hospital<br />

Baltimore, Maryland


cME/cE iNFoRMATioN<br />

_<br />

pRoGRAM BEGiNS BELow<br />

AccREDiTATioN STATEMENTS<br />

physicians<br />

This activity has been planned and implemented in accordance with the Essential Areas and<br />

Policies of the Accreditation Council for Continuing Medical Education through the joint<br />

sponsorship of the Johns <strong>Hopkins</strong> University School of Medicine and The Institute for Johns<br />

<strong>Hopkins</strong> Nursing. The Johns <strong>Hopkins</strong> University School of Medicine is accredited by the<br />

AC<strong>CME</strong> to provide continuing medical education for physicians.<br />

Nurses<br />

The Institute for Johns <strong>Hopkins</strong> Nursing is accredited as a provider of continuing nursing<br />

education by the American Nurses Credentialing Center's Commission on Accreditation.<br />

The Institute for Johns <strong>Hopkins</strong> Nursing and the American Nurses Credentialing Center do not<br />

endorse the use of any commercial products discussed or displayed in conjunction with this<br />

educational activity<br />

Respiratory Therapists<br />

Respiratory therapists should visit this page to confirm that AMA PRA Category 1 Credit(s)<br />

are accepted toward fulfillment of RT requirements.<br />

cREDiT DESiGNATioNS<br />

physicians<br />

eNewsletter: The Johns <strong>Hopkins</strong> University School of Medicine designates this enduring<br />

material for a maximum of 1.0 AMA PRA Category 1 Credit. Physicians should claim only the<br />

credit commensurate with the extent of their participation in the activity.<br />

Podcast: The Johns <strong>Hopkins</strong> University School of Medicine designates this enduring material<br />

for a maximum of 0.5 AMA PRA Category 1 Credits(s). Physicians should claim only the<br />

credit commensurate with the extent of their participation in the activity.<br />

Nurses<br />

eNewsletter: The 1 contact hour educational activity is provided by The Institute for Johns<br />

<strong>Hopkins</strong> Nursing. Each newsletter carries a maximum of 1 contact hour or a total of 8 contact<br />

hours for the eight newsletters in this program.<br />

Podcast: This 0.5 contact hour educational activity is provided by The Institute for Johns<br />

<strong>Hopkins</strong> Nursing. Each podcast carries a maximum of 0.5 contact hours or a total of 4 contact<br />

hours for the eight podcasts in this program.<br />

To obtain contact hours, you must complete this Educational Activity and post-test by<br />

October 30, 2015.<br />

Respiratory Therapy<br />

For United States: Visit this page to confirm that your state will accept the CE Credits gained<br />

through this program.<br />

For Canada: Visit this page to confirm that your province will accept the CE Credits gained<br />

through this program.<br />

SUccESSFUL coMpLETioN<br />

To successfully complete this activity, participants must read the content, and then link to the<br />

Johns <strong>Hopkins</strong> University School of Medicine's <strong>CME</strong> website, or the Institute for Johns <strong>Hopkins</strong><br />

Nursing to complete the post–test and evaluation. Once you receive a passing grade, you can<br />

access and print your certificate of credit.<br />

NOTE: If you have already registered for other <strong>Hopkins</strong> <strong>CME</strong> programs on their prospective<br />

websites simply enter the requested information when prompted.<br />

There are no fees or prerequisites for this activity.<br />

This activity is supported by educational grants from Abbott Nutrition, Cornerstone<br />

Pharmaceuticals, Ikaria, and Mead Johnson Nutrition.<br />

LAUNch DATE<br />

June 21, 2012; activities expire two years from the date of each publication.<br />

iNTERNET cME poLicy<br />

The Office of Continuing Medical Education (O<strong>CME</strong>) at the Johns <strong>Hopkins</strong> University School of<br />

Medicine is committed to protecting the privacy of its members and customers. Johns <strong>Hopkins</strong><br />

University SOM <strong>CME</strong> maintains its Internet site as an information resource and service for<br />

physicians, other health professionals and the public.<br />

Continuing Medical Education at the Johns <strong>Hopkins</strong> University School of Medicine will keep<br />

your personal and credit information confidential when you participate in a <strong>CME</strong> Internet–<br />

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University School of Medicine's <strong>CME</strong> program. <strong>CME</strong> collects only the information necessary to<br />

provide you with the services that you request.<br />

DiScLAiMER STATEMENT<br />

The opinions and recommendations expressed by faculty and other experts whose input is<br />

included in this program are their own. This enduring material is produced for educational<br />

purposes only. Use of the Johns <strong>Hopkins</strong> University School of Medicine name implies a review<br />

of educational format, design, and approach. Please review the complete prescribing<br />

information of specific drugs or combination of drugs, including indications, contraindications,<br />

warnings, and adverse effects, before administering pharmacologic therapy to patients.<br />

STATEMENT oF RESpoNSiBiLiTy<br />

The Johns <strong>Hopkins</strong> University School of Medicine takes responsibility for the content, quality,<br />

and scientific integrity of this <strong>CME</strong> activity.<br />

STATEMENT oF NEED<br />

Through discussions with expert physician/educators, a survey of practicing neonatologists,<br />

and a review of the current literature, including national and regional guidelines and quality-ofcare<br />

measures, the following core learning gaps have been identified:<br />

n In addition to cognitive, educational, and behavioral impairments later in life, former<br />

premature infants with BPD also suffer higher rates of long-term airway obstruction and<br />

mild exercise intolerance, potentially preventable with better NICU and post-discharge care.<br />

n Protocols for noninvasive methods of pulmonary support are underused or misused in<br />

many neonatal care settings, resulting in higher rates of lung injury in preterm infants from<br />

mechanical ventilation.<br />

n Neonatologists need a consistent and precise approach to the diagnosis and treatment of<br />

ventilator-acquired pneumonia (VAP) to minimize ineffective empiric antibiotic treatment.<br />

n Although major reductions in the burden of CLABSI in NICUs have been achieved, variable<br />

rates of sepsis in different NICUs indicate that adherence to best practices and vigilant<br />

preventive interventions are not as uniform as they could and should be.<br />

n Too few of the ≈90% of premature infants discharged with nutritional deficiencies receive<br />

calorie- and protein-enriched formulas that prevent near-term developmental deficits and<br />

long-term damaging health effects, such as metabolic syndrome.<br />

n Neonatologists are not fully aware of the comparative merits of IV soybean oil-based lipid<br />

emulsions and parenteral omega-3 lipid emulsions in the PNALD setting.<br />

iNTENDED AUDiENcE<br />

This activity has been developed for neonatologists, respiratory therapists, neonatal nurses<br />

and nurse practitioners, and others involved in the care of patients in the NICU.<br />

DiScLoSURES<br />

As a provider accredited by the Accreditation Council for Continuing Medical Education<br />

(AC<strong>CME</strong>), it is the policy of the Johns <strong>Hopkins</strong> University School of Medicine Office of<br />

Continuing Medical Education (O<strong>CME</strong>) to require signed disclosure of the existence of<br />

financial relationships with industry from any individual in a position to control content of a<br />

<strong>CME</strong> activity sponsored by O<strong>CME</strong>. Members of the Planning Committee are required to<br />

disclose all relationships, regardless of their relevance to the activity content. Faculty are<br />

required to disclose only those relationships that are relevant to their specific presentations.<br />

No planners have indicated that they have any financial interests or relationships with a<br />

commercial entity.<br />

Guest Author Disclosures<br />

coNFiDENTiALTy DiScLAiMER FoR coNFERENcE ATTENDEES<br />

I certify that I am attending a Johns <strong>Hopkins</strong> University School of Medicine <strong>CME</strong> activity for<br />

accredited training and/or educational purposes.<br />

I understand that while I am attending in this capacity, I may be exposed to "protected health<br />

information," as that term is defined and used I <strong>Hopkins</strong> policies and in the federal HIPAA<br />

privacy regulations (the Privacy Regulations). Protected health information is information about<br />

a person’s health or treatment that identifies the person.<br />

I pledge and agree to use and disclose any of this protected health information only for the<br />

training and/or educational purposes of my visit and to keep the information confidential.<br />

I understand that I may direct to the Johns <strong>Hopkins</strong> Privacy Officer any questions I have about<br />

my obligations under this Confidentiality Pledge or under any of the <strong>Hopkins</strong> policies and<br />

procedures and applicable laws and regulations related to confidentiality. The contact<br />

information is Johns <strong>Hopkins</strong> Privacy Officer, telephone: 410–735–6509. Email:<br />

HIPAA@jhmi.edu.<br />

“The Office of Continuing Medical Education at The Johns <strong>Hopkins</strong> University School of<br />

Medicine, as provider or this activity, has relayed information with the <strong>CME</strong><br />

attendees/participants and certifies that the visitor is attending for training, education and/or<br />

observation purposes only.”<br />

For <strong>CME</strong> questions, please contact the <strong>CME</strong> Office at (410) 955-2959 or email<br />

cmenet@jhmi.edu.<br />

For <strong>CME</strong> certificates, please call (410) 502–9634.<br />

Johns <strong>Hopkins</strong> University School of Medicine<br />

Office of Continuing Medical Education<br />

Turner 20/720 Rutland Avenue<br />

Baltimore, Maryland 21205–2195<br />

Reviewed and Approved by<br />

General Counsel, Johns <strong>Hopkins</strong> Medicine (4/1/03)<br />

Updated 4/09<br />

hARDwARE & SoFTwARE REqUiREMENTS<br />

Pentium 800 processor or greater, Windows 98/NT/2000/XP/7 or Mac OS 9/X, Microsoft<br />

Internet Explorer 5.5 or later, 56K or better modem, Windows Media Player 9.0 or later, 128<br />

MB of RAM, sound card and speakers, Adobe Acrobat Reader, storage, Internet connectivity,<br />

and minimum connection speed. Monitor settings: High color at 800 x 600 pixels.<br />

eNeonatal Review Podcast <strong>Transcript</strong>, Volume 9: Issue 14


eNEoNATAL REviEw poDcAST TRANScRipT<br />

MR. BoB BUSKER: Welcome to this eNeonatal<br />

Review Podcast.<br />

eNeonatal Review is presented by the Johns <strong>Hopkins</strong><br />

University School of Medicine, and the Institute for<br />

Johns <strong>Hopkins</strong> Nursing. This program is supported by<br />

educational grants from Abbott Nutrition, Cornerstone<br />

Pharmaceuticals, Ikaria, and Mead Johnson Nutrition.<br />

Today’s program is a companion piece to our<br />

eNeonatal Review newsletter issue: Optimizing<br />

Nutritional Support with Protein and Energy for<br />

Very Low Birth Weight Infants.<br />

Our guest today is one of that issue’s authors, Dr.<br />

David Adamkin, from the University of Louisville.<br />

This activity has been developed for neonatologists,<br />

respiratory therapists, nurse practitioners, neonatal<br />

nurses, and others who work in the NICU. There are<br />

no fees or prerequisites for this activity.<br />

The Accreditation and Credit Designation Statements<br />

can be found at the end of this podcast. For additional<br />

information about accreditation, <strong>Hopkins</strong> policies, and<br />

expiration dates and to take the posttest to receive<br />

credit online, please go to our website newsletter<br />

archive, www.eneonatalreview.org, and click the<br />

Volume 9, Issue 14 podcast link.<br />

Learning objectives for this audio program are, that<br />

after completing this activity, the participant will<br />

demonstrate the ability to:<br />

n Describe the importance of starting parenteral<br />

nutrition in the first hours of life, even in the face<br />

of critical illness in VLBW infants;<br />

n Evaluate the role of parenteral amino acids in<br />

glycemic control, as well as lipids in relation to lung<br />

dysfunction, in VLBW infants; and,<br />

n Discuss the role of donor-fortified milk in VLBW<br />

infants.<br />

I’m Bob Busker, managing editor of eNeonatal<br />

Review. On the line we have with us Dr. David H.<br />

Adamkin, Professor of Pediatrics, Director of the<br />

Division of Neonatal Medicine, and Rounsavall<br />

Endowed Chair of Neonatology, at the University<br />

of Louisville.<br />

Dr. Adamkin has indicated that he has no financial<br />

interests or relationships with any commercial entity<br />

whose products or services are relevant to the content<br />

of this presentation, and his discussion today will not<br />

reference the unlabeled or unapproved uses of any<br />

drugs or products.<br />

Dr. Adamkin, welcome to this eNeonatal Review<br />

podcast.<br />

DR. DAviD ADAMKiN: Thank you very much, Bob.<br />

MR. BUSKER: In your newsletter issue, Doctor, you<br />

reviewed studies describing the importance of<br />

enhancing nutrition in very low birth weight infants —<br />

that would be babies weighing less than 1500gm— to<br />

decrease morbidities and promote improved<br />

neurodevelopmental outcomes. What I’d like to do<br />

today is expand on that information, and discuss how<br />

it can actually be applied in the NICU. So if you<br />

would, doctor — start us out with patient scenario.<br />

DR. ADAMKiN: The case that we’re discussing is<br />

a 610 gm, small for gestational age, 26-week infant,<br />

delivered by emergency C-section because of placental<br />

abruption and fetal distress. Baby’s Apgar scores were<br />

2, 4, 6, and 8, at 1, 5, 10, and 15 minutes, respectively.<br />

Infant received positive pressure ventilation in the<br />

delivery room and was intubated and given surfactant.<br />

The cord blood pH is 7 with a base excess of -10. The<br />

infant is started on intravenous fluids of D10W<br />

through a UVC and D5W in the UAC for total fluids of<br />

80 cc/kg/daycc/kg/day.<br />

So this is a tiny baby that’s growth-restricted with a<br />

difficult initial course, including fetal acidosis, and is<br />

started on D10 and D5 through the UVC and the UAC.<br />

At 12 hours of age the morning labs include a plasma<br />

glucose of 180mg/dLmg/dL after two ACCU-CHEKs<br />

revealed 140 and 160, and the potassium is 7.3<br />

mEq/L. The infant’s urine output has been 1.5<br />

cc/kg/hr, the BUN is 15, and the creatinine is 0.7.<br />

MR. BUSKER: Why wasn’t this baby started on<br />

early TPN?<br />

DR. ADAMKiN: It’s possible, because of the baby’s<br />

condition at birth, the fetal hypoxia acidosis, that the<br />

clinicians were concerned about the baby’s ability to<br />

metabolize TPN and that may have been why the<br />

clinicians chose not to start TPN. Let’s delve into<br />

eNeonatal Review Podcast <strong>Transcript</strong>, Volume 9: Issue 14<br />

1


that a little bit further and examine exactly what the<br />

baby is getting with the fluids that were started and<br />

why it may be problematic that the baby was not<br />

initiated on early TPN.<br />

The fluids that were provided this baby, D10 in the<br />

UVC and D5W in the UAC, would provide about<br />

22 cal/kg/day for this baby. That’s a very modest<br />

amount of energy and represents a glucose infusion<br />

rate of about 4 mg/kg/min. That means this baby<br />

would be catabolic because of the inadequacy of the<br />

energy provided. And in the absence of protein, as<br />

we see in both the Senterre article and the Radmacher<br />

articles that energy without protein will not place the<br />

baby in positive nitrogen balance. 1,2<br />

So it is very important additionally to appreciate the<br />

relationship between early nutrition and severity of<br />

illness. In other words, because this baby was<br />

perceived as being so ill, the clinicians decided not to<br />

initiate the amino acids. This was a perception of<br />

illness, but as shown in the final paper that we<br />

reviewed, the paper from Ehrenkranz on how early<br />

nutrition mediates the influence of severity of illness<br />

on these babies, we learned that early nutrition,<br />

despite the baby being more ill, actually improves<br />

outcome, including prevention of morbidities and<br />

prevention of mortality. 3<br />

MR. BUSKER: Doctor, let me ask you to speculate for<br />

us: is it possible that early TPN might have prevented<br />

both the nonoliguric hyperkalemia and the<br />

hyperglycemia in this infant?<br />

DR. ADAMKiN: It’s quite likely the answer to that<br />

is yes. We know that early amino acids have<br />

dramatically reduced the incidence of hyperglycemia<br />

and nonoliguric hyperkalemia in these extremely low<br />

birth weight infants. Early amino acids stimulate<br />

insulin activity and secretion of insulin to promote<br />

glucose tolerance. The insulin is necessary for<br />

transport of glucose into the cell and to prevent<br />

intracellular energy failure, which allows potassium<br />

to leak out of the cell. That is mediated through an<br />

enzyme called sodium potassium ATPase.<br />

This enzyme regulates the maintenance of potassium<br />

in the cell. When there is intracellular energy failure<br />

because insulin activity is decreased related to the<br />

absence of amino acids provided parenterally, then<br />

potassium will leak out of the cell as this enzyme<br />

activity decreases.<br />

MR. BUSKER: Thank you for that clarification,<br />

Dr. Adamkin. What happened next with this infant?<br />

DR. ADAMKiN: The next day, at 36 hours of age,<br />

this baby weighs 595 gm and that represents a<br />

2.4% postnatal weight loss. The baby is now started<br />

on TPN, including 3 gm/kg/day of amino acids and<br />

2 gm/kg/day of lipids. The infant, despite receiving<br />

two doses of surfactant, remains on 80 % oxygen, a<br />

rate of 60 on the ventilator, pressures of 20/4, and<br />

the x-ray demonstrates severe RDS.<br />

Labs done after being on this TPN for 16 hours<br />

include a BUN of 40mg/dL, a creatinine of .7mg/dL,<br />

and a triglyceride level of 220mg/dL. The urine<br />

output at 52 hours of age has been 4 ml/kg/hr for the<br />

last 24 hours<br />

MR. BUSKER: This elevation in the BUN — from 15<br />

mg/dL to 40 mg/dL— what’s the significance of that?<br />

DR. ADAMKiN: This is a typical dilemma or<br />

conundrum for the clinician managing early TPN<br />

in babies receiving early amino acids. This was also<br />

addressed in the Radmacher paper reviewed in this<br />

issue of eNeonatal Review relating to early amino acid<br />

and the metabolic response of extremely low birth<br />

weight babies. 2<br />

An elevated BUN of up to 40 mg/dL has been<br />

observed in neonates early in life with or without<br />

TPN. The concern is whether this represents excessive<br />

amino acid delivery with decreased utilization and<br />

subsequent oxidation, or more likely it means that the<br />

BUN is simply reflective of adequate utilization by the<br />

baby doing what the baby does metabolically in utero<br />

with amino acids and really is the principle of early<br />

amino acids asking the immature, extremely<br />

premature baby to use amino acids not only to make<br />

lean mass, but to burn as energy.<br />

In that same paper, the Radmacher paper, it was<br />

shown that there was no direct relationship between<br />

BUN and protein dose 2 The reason for that is BUN is<br />

also dependent on acuity of illness, on renal function<br />

and on fluid balance. Therefore, we shouldn’t make<br />

decisions about decreasing the protein in TPN simply<br />

with just one piece of information, a BUN that may be<br />

40. Other factors need to be taken into account which<br />

include the creatinine for renal function, the urine<br />

output that the baby is having, and the clinical<br />

condition of the baby.<br />

eNeonatal Review Podcast <strong>Transcript</strong>, Volume 9: Issue 14<br />

2


So in this particular case, a BUN of 40 with a normal<br />

creatinine, normal urine output, normal postnatal<br />

weight loss, would not appear to represent any<br />

problem with the early initiation of amino acids.<br />

The second issue that needs to be addressed is that<br />

when amino acids are used for energy, per our<br />

discussion just a moment ago, the amino acids are<br />

converted to carbon dioxide and ammonia. The<br />

ammonia is converted to urea. That’s why there is an<br />

elevated BUN and it does not represent toxicity, it<br />

simply represents adequate utilization of the amino<br />

acid solution.<br />

MR. BUSKER: As you described, this baby’s<br />

triglyceride level is 220mg/dL. What’s the reason for<br />

that elevated level?<br />

DR. ADAMKiN: The elevated triglyceride levels in<br />

this patient probably represent low enzyme activity<br />

for lipoprotein lipase, which is the enzyme that breaks<br />

down or hydrolyzes the intravenous fat solution. We<br />

know that the extremely low birth weight infant and,<br />

in particular, small for gestational age infants, have<br />

the lowest levels of this particular enzyme and are at<br />

the greatest risk to develop hypertriglyceridemia. This<br />

baby is both an ELBW baby and is also an SGA infant.<br />

The triglyceride levels probably should be kept below<br />

200 or perhaps even less than 150 mg/dL in these<br />

patients. We know that when babies have significant<br />

elevations of triglyceride, then some of the fat can end<br />

up in cells lining the intestine and also theoretically<br />

in the lung.<br />

There is a simple way to prevent hypertriglyceridemia<br />

in the majority of babies. It has to do with what I call<br />

the lipid infusion rate. We know that if we don’t<br />

exceed a rate of 0.12 gm/kg/hr of lipids, then the<br />

majority of babies that we treat with intravenous<br />

lipids will not develop hypertriglyceridemia. However,<br />

in this particular case, the baby was receiving 2 grams<br />

per kilogram per day of lipid infused over 24 hours,<br />

and that comes out to .08 grams per kilogram per<br />

hour, which is certainly below the .12 grams per<br />

kilogram per hour that we recommended. However,<br />

again, what’s unique about this baby is the fact that<br />

the baby was born growth restricted or SGA. For the<br />

majority of babies, again, if we don’t exceed the .12<br />

grams per kilogram per hour, these babies will not<br />

develop hypertriglyceridemia. Therefore, the<br />

maximum dose of lipid recommended by the<br />

Committee of Nutrition of the Academy of Pediatrics<br />

is 3 gm/kg/day of lipids. When we infuse that dose<br />

over 24 hours, it comes out to 0.12 gm/kg/hr which<br />

is the rate of infusion that we recommend. Therefore,<br />

the simplest strategy is to infuse babies over 24 hours<br />

with whatever their lipid dose is so that we know at<br />

the maximum dose we won’t exceed the .12 gm/kg/hr.<br />

MR. BUSKER: You also noted that this baby has<br />

severe RDS and requires a high concentration of<br />

oxygen. Is it safe to administer lipids to an infant<br />

with these problems? And overall, what can you tell<br />

us about the implications of hypertriglyceridemia<br />

on lung disease?<br />

DR. ADAMKiN: This is also a controversial area in<br />

the management of the extremely low birth weight<br />

baby. A potential hazard of hyperlipidemia resulting<br />

from the failure to clear the infused lipid in the system<br />

is an adverse effect on gas exchange in the lungs. In<br />

particular, significant concerns have been raised<br />

about the high polyunsaturated fatty acid content of<br />

the lipid emulsions that we use in the United States<br />

that have a very high content of an omega-6 fatty acid<br />

called linoleic acid.<br />

The solutions in the United States contain over 50%<br />

of the fatty acids come from linoleic acid. Why is that<br />

important? Linoleic acid is an 18-carbon-2-doublebond<br />

omega-6 fatty acid and it is the essential fatty<br />

acid. It is converted to a 20-carbon-4-double-bond<br />

omega-6 compound, which is called arachidonic acid.<br />

Here’s where things become important. Arachidonic<br />

acid is converted into vasoactive mediators that may<br />

cause pulmonary vasoconstriction or decrease the<br />

ability of the baby to oxygenate. These compounds<br />

include eicosanoids, prostaglandins, thromboxanes,<br />

and leukotrienes, and all of these increase vasomotor<br />

tone. Therefore, we recommend that for late preterm<br />

babies or term babies who have persistent pulmonary<br />

hypertension, the clinician be very judicious with the<br />

use of lipids in those babies, restricting them to even<br />

no lipids during the height of their illness or a very<br />

modest dose, and the extension to the babies that<br />

we’re talking about today, the extremely low birth<br />

weight baby like this one with surfactant deficiency<br />

that one may want to be conservative with dosing<br />

lipids 1 gm/kg/day to 2 gm/kg/day in babies who<br />

have severe lung disease, and once they’re recovering<br />

we can increase the dose to the maximum of<br />

3 gm/kg/day.<br />

eNeonatal Review Podcast <strong>Transcript</strong>, Volume 9: Issue 14<br />

3


MR. BUSKER: And we’ll continue with Dr. Adamkin<br />

from the University of Louisville in just a moment.<br />

DR. MAUREEN GiLMoRE: Hello. I’m Maureen<br />

Gilmore, assistant professor of pediatrics and director<br />

of neonatology at Johns <strong>Hopkins</strong> Bayview Medical<br />

Center. I’m one of the program directors of<br />

eNeonatal Review.<br />

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www.eneonatalreview.org. Thank you.<br />

MR. BUSKER: Welcome back to this eNeonatal<br />

Review podcast. I’m Bob Busker, managing editor of<br />

the program. Our guest is Dr. David Adamkin,<br />

Director of the Division of Neonatal Medicine at the<br />

University of Louisville. And our topic is Optimizing<br />

Nutritional Support with Protein and Energy for Very<br />

Low Birth Weight Infants.<br />

We’ve been following Dr. Adamkin’s presentation of<br />

a 26 week SGA infant who did not receive TPN until<br />

36 hours of life. As we’ve discussed, the baby shows<br />

severe RDS, hypertriglyceridemia, and elevated BUN.<br />

Let me ask you to continue the case for us now, if you<br />

would, doctor, with the infant at 30 days old.<br />

DR. ADAMKiN: This infant remains oxygen and flow<br />

dependent and has significant chronic changes on<br />

chest x-ray consistent with evolving BPD. Since the<br />

mother did not provide her milk to feed this baby, the<br />

baby was started on donor milk feedings. At this time,<br />

the infant has finally come off of TPN and remains on<br />

the donor human milk at 120 cc/kg/day, and the PICC<br />

line has been removed.<br />

The infant is on caffeine and diuretics for chronic lung<br />

disease, but still has recurring episodes of apnea,<br />

bradycardia and desaturations. Feeding progress has<br />

been slowed by a couple of episodes of feeding<br />

intolerance with residuals and abdominal distention.<br />

This is a very typical course for such an extremely low<br />

birth weight baby and particularly one that is growth<br />

restricted at birth. The infant’s weight at 30 days is<br />

800 grams and the postmenstrual age now at a month<br />

of age is 30 weeks. So this baby remains well below<br />

the third percentile and this baby has postnatal<br />

growth failure.<br />

MR. BUSKER: Now there’s an extremely strong<br />

evidence base that shows that human milk is the<br />

preferred diet for extremely low birth weight infants<br />

to prevent infection and NEC, and it’s also been<br />

shown to lead to better neurocognitive development.<br />

The donor milk that’s being given to this infant: how<br />

much nutrition is that providing at this time, and<br />

what considerations should be made for fortification?<br />

DR. ADAMKiN: The donor milk or even the mother’s<br />

own milk does not provide all of the nutrients that the<br />

very low birth weight babies, and in particular, the<br />

extremely low birth weight babies require. That’s the<br />

reason why many of the tinier babies do not grow very<br />

well on donor human milk and must be fortified,<br />

receive human milk fortification.<br />

The human milk fortification will supplement the<br />

baby with nutrients, most importantly protein,<br />

energy, calcium and phosphorus, will allow the baby<br />

to grow better with the protein and more energy, and<br />

mineralize the bones for length growth with calcium<br />

and phosphorus.<br />

Let’s spend a moment on donor human milk. Donor<br />

human milk is typically provided by mothers who<br />

have had term infants who are contributing their milk<br />

at around two to three months of lactation to a milk<br />

bank. It turns out that donor human milk has less<br />

eNeonatal Review Podcast <strong>Transcript</strong>, Volume 9: Issue 14<br />

4


protein than the milk from the baby’s own mother,<br />

so it has the lowest protein, around 1 gm/dL of<br />

protein or even a little bit less, whereas the mother’s<br />

own milk, at least early on in lactation, has about<br />

1.5 grams per deciliter.<br />

We do know, however, that even the mother’s own<br />

milk, which starts out with more protein than donor<br />

milk has, actually decreases as lactation continues.<br />

So that the mother’s own milk delivering a premature<br />

baby, the protein in that milk declines, and over time<br />

may look more similar to donor or term milk.<br />

Therefore, human milk provided to extremely low<br />

birth weight infants, babies less than a kilogram,<br />

is likely to have inadequate protein content.<br />

In eNeonatal Review, the article reviewed from Sauer<br />

and Kim talks about analyzing human milk with a<br />

spectrophotometer. 4 We also do that here at the<br />

University of Louisville. It allows us to examine in real<br />

time the content of the mother’s milk each day before<br />

it’s provided to the baby. This technology takes about<br />

20 seconds after a human milk sample is provided to<br />

the device and prints out the macronutrient content<br />

of that milk that’s being fed to the baby that day<br />

including the amount of energy. That allows us to<br />

individualize and customize the human milk that that<br />

baby is receiving.<br />

For this particular baby, the 120 ml/kg/day of donor<br />

milk could be providing as little as 1 gm/kg/day to<br />

1.2 gm/kg/day in an infant whose protein<br />

requirement is 4 gm/kg/day. So it is not hard to<br />

understand that this baby is not going to grow very<br />

well. And I believe that we’ll talk more about<br />

fortification in a moment.<br />

MR. BUSKER: Actually, Doctor, let’s take that<br />

moment right now. Tell us more about adjustable<br />

fortification and human milk macronutrient analysis.<br />

DR. ADAMKiN: Sure, thank you. There are two ways to<br />

go about fortifying human milk with a fortifier. One is<br />

an adjustable method. The adjustable method tries to<br />

make up for the changing protein that is decreasing by<br />

analyzing the baby’s BUN as a surrogate for protein<br />

adequacy. So if the BUN is below a certain level — 9<br />

was used in the study that analyzed this strategy —<br />

if the BUN is less than 9, they added more fortifier;<br />

if the BUN was greater than 14, they took away some<br />

fortifier or protein powder.<br />

The method that I alluded to would be called targeted,<br />

or individualized, fortification, where we measure<br />

the protein in the milk, the energy in the milk, and<br />

then we can adjust the nutrient intake based on the<br />

results of the analysis. And again, the paper from<br />

Sauer and Kim in eNeonatal Review showed how to<br />

go about using the point of care spectrophotometry<br />

in the nursery. 4<br />

MR. BUSKER: Thank you for that explanation,<br />

Doctor, and for presenting today’s case discussion.<br />

I want to switch gears now and ask you to look into<br />

the future for us. What upcoming advances do you<br />

see regarding nutritional support for these very low<br />

birth weight infants?<br />

DR. ADAMKiN: I think there is going to be a lot of<br />

excitement about the relationship between nutrition<br />

provided to these very low birth weight babies and<br />

their cognitive outcomes and their risk of adult<br />

diseases later on in life. The so-called programming<br />

of disease that may occur early in life and express<br />

itself later.<br />

The things that I’m referring to for our tiny babies is<br />

methodologies to look at body composition of these<br />

babies. To look at whether or not our feedings are<br />

making them fat or lean. We know that body<br />

composition of these babies may be associated with<br />

the risk later on in life of cardiometabolic diseases.<br />

Another technology that may become available to<br />

use at the bedside in a standard fashion would be<br />

measuring energy expenditure: how are the babies<br />

using the nutrients that we’re giving them, how many<br />

calories are they burning, can we tailor their nutrition<br />

more for the individual baby than simply feeding all of<br />

these babies the same amount of fuel and seeing how<br />

they do. I think measuring body composition and<br />

learning more about their energy expenditure will be<br />

part of the future in optimizing management and<br />

outcomes of these babies.<br />

MR. BUSKER: Thank you for sharing those thoughts,<br />

doctor. To wrap things up, let’s review the key points<br />

of today’s discussion in light of our learning<br />

objectives. So to begin: the importance of starting<br />

parenteral nutrition in the first hours of life in very<br />

low birth weight infants, even in the face of critical<br />

illness.<br />

eNeonatal Review Podcast <strong>Transcript</strong>, Volume 9: Issue 14<br />

5


DR. ADAMKiN: The early initiation of amino acids is<br />

very important in preventing specific metabolic<br />

abnormalities. We have learned from a number of<br />

papers, including in this issue’s eNeonatal Review<br />

from Richard Ehrenkranz, the importance of energy<br />

the first week of life.3 That study showed less<br />

morbidity and mortality related to more energy the<br />

first week of life in these babies. Another study<br />

correlated energy in the first week of life in babies<br />

of this size having higher cognitive scores out to<br />

30 months of life. So the first week of life is a critical<br />

window for optimizing early nutritional support based<br />

on recent recommendations in very low birth weight<br />

babies from Senterre and Rigo. 1<br />

MR. BUSKER: And second: the role of parenteral<br />

amino acids in glycemic control and of lipids with<br />

lung disease in very low birth weight infants.<br />

DR. ADAMKiN: We know that the amino acids turn<br />

on insulin. Insulin will allow the baby to be more<br />

glucose tolerant, and the baby who is more glucose<br />

tolerant will be able to receive more energy and more<br />

energy in the first week of life equals better outcome.<br />

The insulin also keeps potassium in the cell and<br />

prevents nonoliguric hyperkalemia, which can be<br />

life threatening.<br />

So early amino acids have very important roles. The<br />

use of lipids is somewhat more controversial with lung<br />

disease, but we ought to at least be aware that the<br />

possibility exists that the lipid dosage may have to be<br />

modified in babies with lung disease because of the<br />

possibility of lipid adminstration being associated<br />

with pulmonary vasoconstriction and decreasing<br />

oxygenation.<br />

MR. BUSKER: And finally: the use of donor human<br />

milk and the need for fortification in very low birth<br />

weight infants.<br />

DR. ADAMKiN: It’s clear that these extremely low<br />

birth weight babies need human milk — own mother’s<br />

milk first choice, donor human milk second choice —<br />

because it improves outcomes, decreases morbidities,<br />

and prevents necrotizing enterocolitis and infection.<br />

However, from a growth standpoint, the levels of<br />

protein, calcium, and phosphorus are inadequate in<br />

human milk and therefore the human milk must be<br />

fortified to provide the benefits of growth along with<br />

all the other important things that human milk does<br />

to improve the outcome for these babies.<br />

MR. BUSKER: Dr. David Adamkin from the<br />

University of Louisville, thank you for participating in<br />

this eNeonatal Review podcast.<br />

DR. ADAMKiN: Thank you very much, and I hope our<br />

audience can benefit from the information provided.<br />

Thank you.<br />

MR. BUSKER: This podcast is presented in<br />

conjunction with the eNeonatal Review Newsletter,<br />

a peer-reviewed literature review certified for<br />

<strong>CME</strong>/CE credit, emailed monthly to clinicians<br />

treating patients in the NICU.<br />

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eNeonatal Review Podcast <strong>Transcript</strong>, Volume 9: Issue 14<br />

6


The opinions and recommendations expressed by<br />

faculty and other experts whose input is included in<br />

this program are their own. This enduring material is<br />

produced for educational purposes only.<br />

Use of names of the Johns <strong>Hopkins</strong> University School<br />

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eNeonatal Review Podcast <strong>Transcript</strong>, Volume 9: Issue 14<br />

7


REFERENcES<br />

1. Senterre T, Rigo J. Optimizing Early Nutritional Support Based on Recent Recommendations in VLBW<br />

Infants and Postnatal Growth Restriction. J Pediatr Gastroenterol Nutr. 2011 Nov;53(5):536-542.<br />

2. Radmacher PG, Lewis SL, Adamkin DH. Early amino acids and the metabolic response of ELBW infants<br />

(≤ 1000 g) in three time periods. J Perinatol. 2009 Jun;29(6):433-437.<br />

3. Ehrenkranz RA, Das A, Wrage LA, et al. Early nutrition mediates the influence of severity of illness on<br />

extremely LBW infants. Pediatr Res. June;69(6):522-529.<br />

4. Sauer CW, Kim JH. Human milk macronutrient analysis using point-of-care near-infrared spectrophotometry.<br />

J Perinatol. 2011 May;31(5):339-343.<br />

eNeonatal Review Podcast <strong>Transcript</strong>, Volume 9: Issue 14<br />

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