Significance of Change of Gastric Mucosal Partial Pressure of Carbon Dioxide in Rabbit Model with Septic Shock / 实用儿科临床杂志

ABSTRACT

Objective To observe the change of gastric mucosal-arterial partial pressure of carbon dioxide gap [p(g-a)(CO2)] in septic shock rabbit.Methods Sixteen anesthetized and mechanically ventilated rabbit were randomly assigned to 2 groupsshock group(n=8) and control group(n=8).The rabbit in shock group were challenged with intravenous injection of 2 mg/kg Lipopolysaccharides from Escherichia coli.The rabbit in control group were intravenous injection of normal saline solution.Mean arterial pressure(MAP) and heart rate were continuously recorded by multichannel physiologic recorder.Cardiac index(CI) and superior mesenteric blood flow index(SMBFI) were continuously monitored by doppler flowmeter.Gastric mucosal partial pressure of carbon dioxide [pg(CO2)] was evaluated by gas tonometry every 10 min.Arterial and venous blood gas analysis,hemoglobin,and lactate levels were measured every 1 hour.Results The parameters remained stable in control group,but the parameters changed significantly in shock group.Compared with baseline levels,2 hours after Lipopolysaccharides infusion in shock group,MAP decreased from(78?5) mmHg to(50?2) mmHg(1 mmHg=0.133 kPa)(F=145.3 P