N2U -Part 4: Obesity and Micronutrients

2015 N2U Syllabus & Presentations

Critically-ill Obese Patient (Syllabus 51-61) Ann Scheimann

Case: 14 year old with obesity –admitted to PICU with respiratory distress, BM1 51, recent hx/o 30 lb weight loss and declining school performance.

  • Nutritional assessment (syllabus pg 55) References: Port et al. Curr Opin Clin Nutr Metab Care. 2010;13:184-191.McClave et al. JPEN J Parenter Enteral Nutr . 2011: 35: 88s.
  • Components of nutritional support (syllabus pg 56) References: Hurt et al. JPEN J Parenter Enteral Nutr . 2011;35: 60S.
  • Presentation provides good summary of vitamin deficiencies and toxicities (syllabus 57-61), which are more common after bariatric procedures.


IMG_1681 Nutrient Location


B12 Slide From Syllabus

B12 Slide From Syllabus

Key points:

  • For obese/overweight, for calorie calculation, can use adjusted weight to estimate energy expenditure (but don’t give more than 2000 calories per day). For teens/adults, usually need at least 1200 calories per day.
  • Harris-Benedict Equation (HBE) is often used but often overestimates needs (compared with indirect calorimetry) by about 600 cal/day. Common Equations (see below)
  • Protein –provide about 2 gm/kg for weight-for-length at 75-90% for age
  • Formulas with relatively higher protein content (eg. Jevity or Promote) can be helpful to provide adequate protein/nutrients/fluid without excessive calories
  • BUN can help with monitoring adequate nitrogen balance (in the abscess of diuretics). Goal: BUN 7-12 range
  • Goal initially (first 2 weeks) is weight stability or no more than 2-3 lbs of weight loss per week

Bottomline:  N2U served as a good review on a broad range of nutrition topics.  While this talk discussed obesity in critically-ill patients, given the prevalence of obesity and impact on long-term outcomes, I would suggest more attention to this topic at future meetings.


Energy Calculations

Energy Calculations


Disclaimer: This blog entry has abbreviated/summarized this presentation. Though not intentional, some important material is likely to have been omitted; in addition, transcription errors are possible as well.

These blog posts are for educational purposes only. Specific dosing of medications/diets (along with potential adverse effects) should be confirmed by prescribing physician/nutritionist.  This content is not a substitute for medical advice, diagnosis or treatment provided by a qualified healthcare provider. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a condition.


Downtown Chicago

Downtown Chicago


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