Analysis of the factors influencing the preoperative blood pressure fluctuation in patients undergoing elective surgery

Abstract

Background and Aims: To analyze the factors affecting preoperative blood pressure fluctuations in patients undergoing elective surgical surgery. Methods and Results: In 776 elective surgical patients from January to October 2021, the changes of BP and base BP (1 day before the operation) were analyzed by more than 20%, divided into elevated BP group (n=328) and non-fluctuating group (n=448), and analyzed by multivariate logistic regression. Results 776 patients were included, including 335 men and 441 women; SBP increased 12.98±19.33mmHg 1 day before surgery and DBP increased 6.67±13.20mmHg 1 day before surgery. There were 328 patients with more than 20% fluctuation range, and the incidence of preoperative blood pressure increase reached 42.27%. After a multivariate logistic regression analysis, age, preoperative association with hypertension, and sleep duration at 1 day before surgery were independent risk factors for preoperative BP fluctuations. Older blood pressure is more likely to fluctuate (OR=1.021,95%CI: 1.007-1.035, P =0.0030); 1.785 times more frequently (OR=1.785,95%CI: 1.142 ~ 1.807, P =0.0114) before 1 day (OR=0.835,95%CI: 0.747~0.932, P =0.0014) by stepwise regression. Conclusion: The blood pressure in the operating room increased significantly from 1 day before surgery. Age, preoperative association with hypertension, and sleep duration of 1 day before surgery were independent risk factors affecting preoperative blood pressure fluctuations. And the older the age, the greater the fluctuation of blood pressure; the shorter the sleep time, the greater the difference of blood pressure.