PMID: 9444707Jan 28, 1998Paper

Induced hypotension may influence blood loss in orthognathic surgery, but it is not crucial

Scandinavian Journal of Plastic and Reconstructive Surgery and Hand Surgery
M EnlundL I Krekmanov

Abstract

The need for induced hypotension in orthognathic surgery was evaluated. Blood loss, duration of operation, quality of the surgical field, and surgical result were measured in 36 patients, assigned to either hypotension (mean arterial pressure, MAP, 50-64 mmHg) or normotension (MAP > or = 65 mmHg). Hypotension was achieved by increasing the amount of isoflurane given. The hypotensive group had significantly less bleeding over time (mean 0.9 ml/minute, 95% confidence interval (CI) of mean 0.6 to 1.2, compared with 1.8, 95% CI 1.3 to 2.4, p = 0.005). The corresponding difference in total blood loss did not differ significantly between the groups (mean 186 ml, 95% CI 98 to 275, compared with 304, 95% CI 210 to 399). No patient required transfusion of red cells. Neither the duration of surgery, nor the quality of the surgical field, nor the final result were significantly influenced by hypotension. The clinical relevance of induced hypotension in orthognathic surgery must be considered to be doubtful. A mean reduction of less than 150 ml will be of limited value at the low levels of blood loss reported.

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Citations

Oct 16, 2007·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·James Edward PaulLehana Thabane
May 2, 2012·Journal of Neurosurgery. Pediatrics·Mitchel SeruyaRobert F Keating
Mar 14, 2012·Saudi Journal of Anaesthesia·Abbas KarimiMahboobeh Hasheminasab
Dec 18, 2013·International Journal of Oral and Maxillofacial Surgery·E CarlosN C Guimarães
Jan 5, 2011·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Alejandra Piñeiro-AguilarAbel García-García
Jun 16, 2015·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Jesper J OlsenElse M Pinholt
Oct 23, 2008·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Gustavo Jacobucci FarahLuciano Coelho
May 31, 2008·International Journal of Oral and Maxillofacial Surgery·W S Choi, N Samman
Jun 1, 2004·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Göran ZellinK-E Kahnberg
Nov 17, 2009·Journal of Cranio-maxillo-facial Surgery : Official Publication of the European Association for Cranio-Maxillo-Facial Surgery·Altan VarolSalih Ozturk
May 20, 2016·Journal of Cranio-maxillo-facial Surgery : Official Publication of the European Association for Cranio-Maxillo-Facial Surgery·James JeongPatrick Hardigan
Jan 31, 2002·Plastic and Reconstructive Surgery·Lun-Jou LoYu-Ray Chen

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