THE EFFECT OF ANESTHESIA ON THE VENTILATORY FUNCTIONS OF PATIENTS WITH MAXILLO-MANDIBULAR FIXATION
*AKHIWU BI, AKHIWU HO, SAHEEB BD, HABEEB MM
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ABSTRACT
Background: Maxillo-mandibular fixation (MMF) is a procedure still routinely practiced in developing countries.
Aim: To determine the variations in pulmonary functions readings between cases treated under general anesthesia (GA) and those treated under local anesthesia (LA).
Methodology: A descriptive hospital-based study of 106 patients was carried out from January 2011- December 2012. Information was obtained using a questionnaire and all study subjects had their baseline lung functions and their post-operative daily lung function parameters measured for the first week and then weekly for the next five weeks. The data obtained were analyzed using SPSS version 16 and a P-value of =0.05 was considered significant.
Results: A total of 85 males and 21 females participated in the study. The means for age was 30.62±8.06, weight 63.92± 9.96 and BMI 23.21± 3.14 while the means for the pre-operative FVC, FEV and PEF were 3.71 ± 0.70, 1, R 3.14± 0.51 and 8.18± 1.61 respectively. There was a statistically significant drop (p< 0.05) in the FVC, FEV and 1 PEF in the first post operative week. The drop in the lung function parameters were similar between the GA R group and the LA group.
Conclusion: Maxillo-mandibular fixation causes a significant fall in pulmonary function parameters especially in the first 48 hours post-operatively irrespective of whether general or local anaesthesia was used at surgery. The pulmonary functions should be further monitored for more than 48 hours after surgery.
Key Words: Maxillo-mandibular fixation, Reduced pulmonary function, Local and general anesthesia, Nigeria.
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