Spirometric Function Improves in the Morbidly Obese After 1-Year Post-surgery
Source: Obesity Surgery, Volume 20, Number 9, September 2010 , pp. 1273-1277(5)
Abstract:Obesity can negatively affect pulmonary function tests, with or without clinical symptoms, but the impact of bariatric weight loss is still debated. Aiming to document such profile in a consecutive homogeneous population, a prospective cohort study was undertaken.
Sixty-one patients (100% females, age 40 ± 8 years, BMI 49 ± 5 kg/m2 and without respiratory disease) were enrolled. Spirometric analysis was carried out to compare preoperative respiratory pattern with outcome after 6 and 12 months. Variables included vital capacity (VC), expiratory reserve volume (ERV), forced expiratory volume (1 s) (FEV1), FEV1/FVC ratio and maximum voluntary ventilation (MVV). Correlation of results with weight loss was examined.
The following initial variables exhibited significant difference when compared to the 12-month postoperative control: FVC (P = 0.0308), FEV1/FVC (P = 0.1998), MVV (P = 0.0004) and ERV (P = 0.2124). Recovery of FVC and FEV1/FVC occurred earlier by 6 months. The most seriously depressed preoperative finding was ERV, which even after 1 year still remained inadequate.
(1) Pulmonary limitations were diagnosed in approximately one third of the population. (2) Changes were demonstrated for FVC, FEV1/FVC, ERV and MVV. (3) FEV1 and FEV1/FVC were acceptable due to the absence of an obstructive pattern. (4) Two variables increased by 6 months (FEV1/FVC and ERV), whereas recovery for others was confirmed after 1 year. (5) The only exception was ERV which continued below the acceptable range.
Document Type: Research Article
Affiliations: 1: Department of Physical Therapy, Londrina State University, Londrina, Paraná, Brazil, Email: email@example.com 2: Department of Gastroenterology, Hospital das Clínicas, São Paulo University, São Paulo, Brazil
Publication date: 2010-09-01