Nutritional intake and gastro-intestinal symptoms in critically ill COVID-19 patients.

BACKGROUND & AIMS: Critically ill COVID-19 patients seem hypermetabolic and difficult to feed enterally, due to gastro-intestinal (GI) symptoms such as high gastric residual volumes (GRV) and diarrhea. Our aim was to describe the association of nutritional intake and GI symptoms during first 14 days of ICU admission. METHODS: Observational study including critically ill adult COVID-19 patients. Data on nutritional intake [enteral nutrition (EN) or parenteral nutrition] and GI symptoms were collected during 14 days after ICU admission. Target energy and protein feeding goals were calculated conform ESPEN guidelines. GI symptoms included GRV (ml/d), vomiting, abdominal distension, and faeces (ml/d). High GRV's were classified as ≥2 times ≥150 ml/d and diarrhea as Bristol stool chart ≥6. GI symptoms were defined as mild if at least one symptom occurred and as moderate when ≥2 symptoms occurred. Acute gastrointestinal injury (AGI) grades of III were classified as GI dysfunction and grades of IV were considered as GI failure with severe impact on distant organs. Linear mixed model analysis was performed to explore the development of nutritional intake and GI symptoms over time at day (D) 0, 4, 10, and 14. RESULTS: One hundred and fifty patients were included [75% male; median age 64 years (IQR 54-70)]. BMI upon admission was 28 kg/m2 (IQR 25-33), of which 43% obese (BMI > 30 kg/m2). Most patients received EN during admission (98% D4; 96% D10-14). Mean energy goals increased from 87% at D4 to 93% D10-14 and protein goals (g/kg) were increasingly achieved during admission (84% D4; 93% D10-14). Presence of moderate GI symptoms decreased (10% D0; 6% D4-10; 5% D14), reversely mild GI symptoms increased. Occurrence of GI dysfunction fluctuated (1% D0; 18% D4; 12% D10; 8% D14) and none of patients developed grade IV GI failure. Development of high GRV fluctuated (5% D0; 23% D4; 14% D10; 8% D14) and occurrence of diarrhea slightly increased during admission (5% D0; 22% D4; 25% D10; 27% D14). Linear mixed models showed only an association between AGI grades III and lower protein intake at day 10 (p = 0.020). CONCLUSION: Occurrence of GI symptoms was limited and seems no major barrier for EN in our group of critically COVID-19 patients. Nutritional intake was just below requirements during the first 14 days of ICU admission. The effect on nutritional status remains to be studied.

Energy expenditure and feeding practices and tolerance during the acute and late phase of critically ill COVID-19 patients.

BACKGROUND & AIMS: Different metabolic phases can be distinguished in critical illness, which influences nutritional treatment. Achieving optimal nutritional treatment during these phases in critically ill patients is challenging. COVID-19 patients seem particularly difficult to feed due to gastrointestinal problems. Our aim was to describe measured resting energy expenditure (mREE) and feeding practices and tolerance during the acute and late phases of critical illness in COVID-19 patients. METHODS: Observational study including critically ill mechanically ventilated adult COVID-19 patients. Indirect calorimetry (Q-NRG+, Cosmed) was used to determine mREE during the acute (day 0-7) and late phase (>day 7) of critical illness. Data on nutritional intake, feeding tolerance and urinary nitrogen loss were collected simultaneously. A paired sample t-test was performed for mREE in both phases. RESULTS: We enrolled 21 patients with a median age of 59 years [44-66], 67% male and median BMI of 31.5 kg/m2 [25.7-37.8]. Patients were predominantly fed with EN in both phases. No significant difference in mREE was observed between phases (p = 0.529). Sixty-five percent of the patients were hypermetabolic in both phases. Median delivery of energy as percentage of mREE was higher in the late phase (94%) compared to the acute phase (70%) (p = 0.001). Urinary nitrogen losses were significant higher in the late phase (p = 0.003). CONCLUSION: In both the acute and late phase, the majority of the patients were hypermetabolic and fed enterally. In the acute phase patients were fed hypocaloric whereas in the late phase this was almost normocaloric, conform ESPEN guidelines. No significant difference in mREE was observed between phases. Hypermetabolism in both phases in conjunction with an increasing loss of urinary nitrogen may indicate that COVID-19 patients remain in a prolonged acute, catabolic phase.

Feeding practises and REE in critically ill COVID-19 patients

Rationale: The optimal feeding strategy in critically ill COVID-19 patients is challenging. They seem particularly difficult to feed enterally, presenting with high gastric residual volumes (GRV) and diarrhoea. Our aim was to describe feeding practises and measured resting energy expenditure (mREE) during the acute and late phases of critical illness. Methods: Observational study including critically ill mechanically ventilated adult COVID-19 patients. Indirect calorimetry (IC;Q-NRG+) was used to determine mREE during the acute (day 1-7) and late phase (> day 7) of critical illness. Data on enteral nutrition (EN) and parenteral nutrition (PN) were collected on the same day. Comparison of mREE and predicted REE (pREE) (mREE/pREE *100%) was performed to explore hypometabolism (<90%) and hypermetabolism (>110%). In both phases parameters for intolerance to EN were collected on consequent days such as GRV (mL/d), vomiting, abdominal distention and diarrhoea. Results: We enrolled 35 patients in whom 42 IC measurements were performed (20 acute phase;22 late phase). Median age 63 year [IQR 47-69], 80% male. BMI upon admission was 27.8 kg/m2 [IQR 24.2-34.0], 43% obese (BMI>30 kg/m2). During the acute phase mREE was 1956 kcal [IQR 1846-2441] and respiratory quotient (RQ) 0,72 [IQR 0,67-0,81];10% was hypometabolic, 60% hypermetabolic. The median delivery of energy was 64% of mREE. All patients received EN;70% via nasogastric tube (NGT) and 30% via nasoduodenal tube (NDT). Median GRV was 195 mL/d [IQR 41-450], 5% vomited, 5% abdominal distention and 20% diarrhoea. In the late phase mREE was 2374 kcal [IQR 1828-2711] and RQ 0,81 [IQR 0,74-0,86];9% was hypometabolic and 68% hypermetabolic. The median delivery of energy was 92% of mREE. All patients except one received EN;50% NGT and 50% NDT, with a median GRV of 48 mL/d [IQR 15-180]. A total of 5% vomited, 9% abdominal distention and 15% diarrhoea. Conclusion: In both the acute and late phase the majority of the patients were hypermetabolic. Almost all patients were fed enterally, with a slightly higher presence of EN intolerance parameters during the acute phase. In the acute phase patients were fed hypocaloric whereas in the late phase this was almost normocaloric (64% vs 92% of mREE) conform our ESPEN based nutrition protocol. Elaborate data analysis are planned and will be presented at the conference. Disclosure of Interest: None declared