Abstract
Background: Hypotensive anaesthesia is a method of reducing the blood pressure of a patient at some point of surgical treatment to reduce the quantity of blood loss. This is the most frequently used approach in microvascular surgery however it can be used in a wide range of surgeries. The efficacy of hypotensive anaesthesia is decreasing intraoperative blood loss, lowering operation time and enhancing the quality of surgery. Objectives: The aim of the study is to assess the effects of hypotensive anaesthesia on reducing intraoperative blood loss, duration of operation and quality of surgical field during orthognathic surgery in a tertiary care hospital. Methods: The study was carried out in the Anaesthesiology Department of Dhaka Dental College and Hospital, Dhaka, Bangladesh from July 2021 to December 2022. A prospective, randomized clinical research with 72 individuals was conducted. They were assigned at randomization to either a normotensive or a hypotensive anaesthesia group. Results: The mean blood loss for surgeries carried out under normotensive anaesthesia was 276.66±57.50 ml, whereas the mean blood loss for surgeries carried out under hypotensive anaesthesia was 162.50±37.25 ml. In the normotensive and hypotensive groups, the mean duration of operation was 195.83±60.44 minutes and 195±58.05 minutes respectively. Conclusions: Reducing intraoperative blood loss is really a benefit of hypotensive anaesthesia. As a standard method for orthognathic surgery, hypotensive anaesthesia can be justified for less blood loss and enhancing the quality of surgical field.
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