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Harsukh Educational Charitable Society International Journal of Community Health and Medical Research

Volume 6 Issue 1 Jan-March 2020

Original Articles

Assessment of effect of anaesthetic technique in pulmonary function
Garima Charak, Shruti Sharma

Background: Respiratory complications in the postanesthesia period are an important area of concern because they are a major cause of morbidity and mortality. A critical respiratory event in the postanesthesia care unit (PACU) is the complex of major unanticipated ventilation problems, including hypoxemia. GA causes relaxation of jaw and pharyngeal muscles and leads to posterior displacement of tongue. Loss of cough reflex along with increased secretions results in airway obstruction, laryngospasm and bronchospasm. GA abolishes the sigh reflex with rapid onset of atelectasis in the majority of the patients. Irrespective of mode of ventilation (spontaneous or mechanical), there is loss of muscle tone and dose-dependent decrease in minute ventilation (MV) as a result of decrease in respiratory rate or tidal volume (VT) or both. Aim of the study: To assess effect of anaesthetic technique in pulmonary function. Materials and methods: The present study was conducted in the Department of Anesthesiology of the Medical institutions. A total of 50 patients who were scheduled for ambulatory surgery were included in the study. The patients were divided into four groups according to BMI as healthy (18.5-24.9 kg/m2), overweight (25-29.9 kg/m2), obese (30-39.9 kg/m2), morbidly obese (over 40 kg/m2). Respiratory function tests of the patients in standing postures were performed 24 hours before the operation and on the 1st and 6th day after the operation. Blood gas values and anaesthesia periods were recorded. Forced expiratory volume in 1st second (FEV1), forced vital capacity (FVC) and FEV1/FVC values were included in this study. The same person tested every patient with a mobile hand spirometer (one flow spirometre; Clent Clarke 2002, made in UK) for respiratory function test. Results: We observed that 28 participants were males and 22 were females. Mean age of the patients was 54.65 years, mean weight was 72.33 and mean height was 1.69 m. We observed that FEV1, FVC and FEV1/FVC values in all cases were statistically low compared to preoperative values on 1st day after the operation. Percentage changes of respiratory function test were calculated preoperatively and postoperative 1st day. The changes were compared and there was a significant decrease in FEV1, FVC and FEVI/FVC in subjects. Conclusion: Within the limitations of the present study, it can be concluded that anesthesia does not have significant effect on the pulmonary functions of the patient after the surgery. Keywords: Pulmonary functions, surgery, postoperatively, PFT

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