Effect Of Changing The Preset Value Of Monitor Alarm On The Incidence,Degree And Duration Of Intraoperative Hypotension In Patients

Objective: To determine the effect of changing the preset of monitor alarm on the incidence,degree and duration of intraoperative hypotension in patients.Methods: This study included all adult patients who underwent non-cardiac surgery in the First Anesthesia Department of the Fourth Hospital of Hebei Medical University from February 21,2019 to August 30,2019.The exclusion criteria included patients less than 18 years old,whose systolic blood pressure was higher than or lower than 180 mm Hg or lower than 100 mm Hg,with acute massive hemorrhage during operation,with anaphylactic shock and who needed to undergo controlled hypotension.Every day,the experimental staff randomly set the alarm to the monitor.In the experimental group(group A),the blood pressure alarm value of the monitor was set to be higher than or lower than the 160 mm Hg monitor,and the alarm volume was 5.The blood pressure alarm value of the control group(group C)was set at the factory,that is,the systolic blood pressure was higher than 180 mm Hg or lower than the 70 mm Hg monitor,and the alarm volume was 3.The data were collected for the number of times,duration and the lowest blood pressure of each patient whose systolic blood pressure was lower than 90 mm Hg.At the same time,record the change of alarm parameters during operation,including whether to change the alarm value,whether to change the alarm volume,whether to turn off the alarm.Results: A total of 2404 cases were included in this study.There were 1201 cases in the control group and 1203 cases in the experimental group.There was no difference in patients,anesthesiologists and types of operation between the control group and the experimental group.Compared with the control group,the incidence of hypotension in the test group decreased significantly by 31.2%(375/1201)VS 11.5%(138/1203)(n,P<0.001).The duration of hypotension was shortened from 3(2,6)minutes to 2(2,3)minutes [median(interquartile range)](P<0.001).In patients with hypotension,the lowest mean arterial pressure increased from 62.33(59,65.67)mm Hg in the control group to 63.67(61.67,66.67)mm Hg in the experimental group [median(interquartile range)](P<0.001).In patients with hypotension,the risk score of terminal organ injury decreased from 1(0,1)to 0(0,1)[median(interquartile range)](P<0.001).Conclusions: Changing the alarm setting of the monitor can reduce the risk of hypotension and the risk of terminal organ injury.