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Hypotensive anaesthesia and blood loss in orthognathic surgery: a clinical study
K Praveen1, V Narayanan, M R Muthusekhar
1Department of Oral and Maxillofacial Surgery, Saveetha Dental College and Hospitals, Madras, India.
Objectives:
To find out whether hypotensive anaesthesia minimized blood loss during orthognathic surgery.
Design:
A prospective randomized clinical study.
Subjects And Methods:
53 consecutive patients, 15-33 years old, who were to have orthognathic operations were admitted to the study. They were randomly allocated to either normotensive or hypotensive anaesthesia.
Results:
Median (range) blood loss/operation (ml) under hypotensive anaesthesia was 200 (90-400)ml and under normotensive anaesthesia was 350 (130-1575)ml (P= 0.01), and those for maxillary segmental osteotomy under hypotensive anaesthesia were 85 (40-240)ml and, under normotensive anaesthesia, 175 (100-190)ml (P= 0.05).
Conclusion:
There was pronounced reduction in blood loss during orthognathic operations done under hypotensive anaesthesia compared with those done under normotensive anaesthesia.