Related Experiment Video
Updated: Apr 4, 2026

Multidisciplinary Approach to Obesity Management: A Case Report
Published on: May 30, 2025
[EFFECTS OF WEIGHT LOSS AFTER BARIATRIC SURGERY ON PULMONARY FUNCTION TESTS AND OBSTRUCTIVE SLEEP APNEA IN MORBIDLY
Ana Santiago1, Carlos Carpio1, Paloma Caballero2
1Servicio de Neumología. Hospital Universitario La Paz. IdiPAZ. Departamento de Medicina y Cirugía. Universidad Autónoma de Madrid.. carlinjavier@hotmail.com.
Introduction:
obesity impacts on respiratory function and also it acts as a risk factor for obstructive sleep apnea (OSA).
Aims:
to study the effects of bariatric surgery on pulmonary function tests and on OSA in morbidly obese women over 4 years.
Methods:
fifteen morbidly obese women (mean body mass index [BMI] 50.52 ± 12.71 kg.m-2, mean age 40.13 ± 10.06 years) underwent pulmonary function tests (PFT) in two opportunities (before and after weight loss surgery). PFT included spirometry, body plethysmography and measure of maximal inspiratory mouth pressure (PImax) and of tension-time index for inspiratory muscles. Also, in both opportunities, resting arterial blood gas tensions were evaluated and a full night sleep register was performed.
Results:
BMI significantly decreased after bariatric surgery (-44.07 kg.m-2 [CI 95% -38.32 - -49.81]). Also, there was a significantly increase in forced expiratory volume in 1 second (FEV1) (p < 0.01), forced vital capacity (FVC) (p < 0.01), expiratory reserve volume (ERV) (p = 0.040), functional residual capacity (FRC) (p = 0.009) and a decline in airways resistance (Raw) (p = 0.018). Concerning sleep registers, apnea hypopnea index (p = 0.001) and desaturation index (p = 0.001) were also reduced after weight loss. Improve in ERV had a significant correlation with weight loss (r = 0.774, p = 0.024). Conclussions: pulmonary function tests and apnea hypopnea index improve after bariatric surgery in mor bidly obese women. Improvement of ERV is well correlated with weight loss.
More Related Videos
08:30Intraperitoneal Glucose Tolerance Test, Measurement of Lung Function, and Fixation of the Lung to Study the Impact of Obesity and Impaired Metabolism on Pulmonary Outcomes
Published on: March 15, 2018
10:05Techniques of Sleeve Gastrectomy and Modified Roux-en-Y Gastric Bypass in Mice
Published on: March 20, 2017
Related Concept Videos
Sleep Apnea
The condition is more prevalent among...
Pharmacokinetics in Obese Patients: Drug Absorption and Distribution
Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion
Drug Dosing: Obese Patients
Heart Failure VI: Adjunct Therapies
COPD: Management Using Bronchodilators and Corticosteroids