Background: It is reported that hypotension during general anesthesia is associated with adverse outcomes in patients having both noncardiac and cardiac surgery. The present retrospective study was undertaken to evaluate the incidence and the predictors of hypotension after induction of general anesthesia (GA) until the start of operation.
Methods: After the IRB approval, 157 patients with hypertension who had undergone surgery under general anesthesia were enrolled. Data were collected using medical chart and anesthesia record. We divided the period into two intervals, from entering the operating room to tracheal intubation (first interval) and from tracheal intubation to start of operation (second period). Hypotension was defined when blood pressure decreased more than or equal to 25 percent compared to blood pressure measured at first in operating room.
Results: Hypotension occurred in 73.2% during the first interval and 96.8% during the second interval. The age was a significant predictor for hypotension during the second interval (P = 0.0087).
Conclusions: The result in this study indicated that the age was a significant predictor for hypotension from tracheal intubation to start of operation.
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