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Enteral Feeding in the Critically Ill: Comparison Between the Supine and Prone Positions. A Prospective Crossover Study in Mechanically Ventilated PatientsDepartment of Intensive Care, Medical Centre Leeuwarden-Zuid, Leeuwarden, The Netherlands
Introduction: Prone position is effective in mechanically
ventilated patients to improve oxygenation. It is unknown if prone position
affects gastric emptying and the ability of continued enteral feeding.
Aim: To determine tolerance of enteral feeding by measuring gastric
residual volumes in enterally fed patients during supine and prone positions.
Methods: Consecutive mechanically ventilated intensive care patients
who were turned to prone position were included. All patients were studied for
6 hours in supine position, immediately followed by 6 hours in prone position,
or vice versa. The rate of feeding was unchanged during the study
period. Gastric residual volume was measured by suctioning the nasogastric
tube after 3 and 6 hours in the same position. Wilcoxon test and regression
analysis were used for analysis. Results: The median volume of
administered enteral feeds was 95 mL after 6 hours in supine position and 110
mL after 6 hours in prone position (p = .85). In 10 patients, a
greater gastric residual volume was found in prone position. In eight others a
greater volume was found in supine position. In 18 of 19 patients, gastric
residual volumes in both positions were
Nutrition in Clinical Practice, Vol. 17, No. 5,
323 (2002) |
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150 mL in 6 hours or
150 mL in
6 hours. Significantly more sedatives were used in prone position. Regression
analysis excluded dopamine dose and the starting position as confounders.
Conclusion: Our results suggest that enteral feeding can be continued
when a patient is turned from supine to prone position or vice versa.
The results indicate that patients with a clinically significant gastric
residual volume in one position are likely to have a clinically significant
gastric residual volume in the other position. 