NSG 4407 Lecture Notes - Lecture 9: Resting Metabolic Rate, Indirect Calorimetry, Medical Ventilator
Document Summary
Malnutrition can lead to dependency on medical ventilator. Males = [66. 6 +(13. 8 x adjbw) +(5 x ht_ - (6. 8 x age)] x 1. 5. Cons = 100"s of equations, no guidelines, only accurate < 40% of the time. Indirect calorimetry = uses inspired oxygen consumption and expired carbon monoxide production measurements to accurately calculate energy expenditure. Objective and accurate because its tailored to each patient. Sccm & aspen > indirect calorimetry should be used to determine energy requirements when available. Equipment = metabolic cars, handheld or tabletop devices, or indirect calorimetry built into ventilator. Calculation of what heat production by measuring inspired oxygen consumption and expired co2. Ree = ree (kcal/day) = [(vo2 x 3. 94) + (vco 2 x 1. 11)] x 1,400 mind/day. Rq = vco2 (carbon dioxide production / vo2 (oxygen consumption) Patient should be in steady state > 10 minutes of measures. 1 measurement before any new nutrition prescription and follow up.
