Gastric residual volume during enteral nutrition in ICU patients: the REGANE study.
OBJECTIVE
To compare the effects of increasing the limit for gastric residual volume (GRV) in the adequacy of enteral nutrition. Frequency of gastrointestinal complications and outcome variables were secondary goals.


METHODS
An open, prospective, randomized study.


METHODS
Twenty-eight intensive care units in Spain.


METHODS
Three hundred twenty-nine intubated and mechanically ventilated adult patients with enteral nutrition (EN).


METHODS
EN was administered by nasogastric tube. A protocol for management of EN-related gastrointestinal complications was used. Patients were randomized to be included in a control (GRV = 200 ml) or in study group (GRV = 500 ml).


RESULTS
Diet volume ratio (diet received/diet prescribed), incidence of gastrointestinal complications, ICU-acquired pneumonia, days on mechanical ventilation and ICU length of stay were the study variables. Gastrointestinal complications were higher in the control group (63.6 vs. 47.8%, P = 0.004), but the only difference was in the frequency of high GRV (42.4 vs. 26.8%, P = 0.003). The diet volume ratio was higher for the study group only during the 1st week (84.48 vs. 88.20%) (P = 0.0002). Volume ratio was similar for both groups in weeks 3 and 4. Duration of mechanical ventilation, ICU length of stay or frequency of pneumonia were similar.


CONCLUSIONS
Diet volume ratio of mechanically ventilated patients treated with enteral nutrition is not affected by increasing the limit in GRV. A limit of 500 ml is not associated with adverse effects in gastrointestinal complications or in outcome variables. A value of 500 ml can be equally recommended as a normal limit for GRV.
Montejo
J C
JC
Medicina Intensiva, Unidad Polivalente, ICU, Hospital Universitario 12 de Octubre, 28041 Madrid, Spain. jmontejo.hdoc@salud.madrid.org
Miñambres
E
E
Bordejé
L
L
Mesejo
A
A
Acosta
J
J
Heras
A
A
Ferré
M
M
Fernandez-Ortega
F
F
Vaquerizo
C I
CI
Manzanedo
R
R
D000368:Aged; D000369:Aged, 80 and over; D004750:Enteral Nutrition / Q000009:adverse effects*; D005260:Female; D005766:Gastrointestinal Contents; D006801:Humans; D007362:Intensive Care Units; D007902:Length of Stay; D008297:Male; D053717:Pneumonia, Ventilator-Associated; D011446:Prospective Studies; D012121:Respiration, Artificial; D013030:Spain