Utilize The Noninvasive Heart Function Monitor To Evaluate The Effects Of End-expiratory Positive Pressure On Hemodynamics In Acute Left Heart Failure

Objective Utilize the Noninvasive Heart Function Monitor to evaluate the effects of end-expiratory positive pressure on hemodynamics in patients with acute left heart failure to choose the PEEP.Methods 45 patients with acute left heart failure use life-support machine;when the ventilation pattern use PEEP(0,3,7,10,13 cm H2O)auxiliary treatment, Utilize the Noninvasive Heart Function Monitor to monitor the hemodynamics parameters including cardiac output(co),cardiac index(CI),surround vascular resistance(SVR),heart rate (HR),mean artery pressure(MAP),central venous pressure (CVP).Results 45 patients with acute left heart failure use life-support machine after PEEP (0,3,7,10,13 cm H2O)auxiliary treatment. HR decrease(P<0.05),MAP decrease (P<0.05). CO,CI showed curvilinear changes with an increase in PEEP。and CO,C1 have no significant change when PEEP was set between 0—7 cm H2O, but dropped when PEEP was changed from 10 to 13 cm H2O,while the changes of SVR was the reverse of CO and CI.the increase of PEEP led to an increase of CVP. Conclusion the use of end-expiratory positive pressure in patients with acute left heartfailure in mechanic ventilation should be appropriate , the PEEP should be adjusted according to the hemodynamics results,while utilize the Noninvasive Heart Function Monitor to evaluate . PEEP should be individualized,and 3—7 cm H2O (normally below 10 cm H2O)is suitable.