[Changes in gastric intramucosal pH and hepato-splanchnic oxygen extraction ratio after heart surgery].
The Do2/VO2 balance of splanchnic organs after heart surgery was evaluated using two different methods; the measurement of hepato-splanchnic oxygen extraction ratio (OERspl) and gastric intramucosal pH (pHi) employing a hepatic venous catheter and a gastric tonometric catheter. Systemic oxygen extraction ratio was within normal ranges during the 24 hours of the experiment, but pHi decreased and OERspl increased significantly at 6 hours after admission to the ICU. Both pHi and OERspl returned gradually to normal levels after 24 hours. We conclude that a period of 24 hours is required to restore sufficient blood flow in the visceral organs to meet oxygen demand and that the pHi reflects the splanchnic DO2/VO2 balance as well as OERspl.
Kunimoto
F
F
Intensive Care Unit, Gunma University School of Medicine, Maebashi.
Arai
K
K
Isa
Y
Y
Hasegawa
Y
Y
Fujita
T
T
D000328:Adult; D000368:Aged; D006348:Cardiac Surgical Procedures; D005260:Female; D005753:Gastric Mucosa / Q000378:metabolism*; D006339:Heart Rate; D006349:Heart Valve Diseases / Q000601:surgery; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008099:Liver / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D010101:Oxygen Consumption; D011184:Postoperative Period; D013154:Spleen / Q000378:metabolism*