A pilot study on the biomechanical assessment of obstructive sleep apnea pre and post bariatric surgery

2018 ◽  
Vol 250 ◽  
pp. 1-6
Author(s):  
Ahmed M. Al-Jumaily ◽  
Sherif Ashaat ◽  
Bryn Martin ◽  
Rachael Pohle-Krauza ◽  
Matthew Krauza ◽  
...  
Keyword(s):  
Bariatric Surgery ◽  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Pilot Study ◽  
Biomechanical Assessment ◽  
Obstructive Sleep ◽  
Post Bariatric Surgery

Fluid Dynamic Analysis of Upper Airway of an Obstructive Sleep Apnea Patient Pre and Post Surgery

2012 ◽  
Author(s):  
Dipankar Biswas ◽  
Francis Loth ◽  
Matthew L. Krauza ◽  
Rachael J. Pohle-Krauza ◽  
Adrian G. Dan ◽  
...  
Keyword(s):  
Bariatric Surgery ◽  
Obstructive Sleep Apnea ◽  
Shear Stress ◽  
Sleep Apnea ◽  
Pressure Drop ◽  
Fluid Dynamic ◽  
Upper Airway ◽  
Post Surgery ◽  
Obstructive Sleep ◽  
Post Bariatric Surgery

The present study compares flow parameters (pressure drop, velocity, and shear stress) in the upper airway between pre- and post-bariatric surgery obstructive sleep apnea (OSA) patients. CT images of the upper airway were obtained prior to and six months post bariatric surgery in patients with a comorbid OSA. In-house software was used to reconstruct 3D geometric models of the upper airway, and fluid flow simulations were conducted using commercial computational fluid dynamics (CFD) software. Results show that pressure drop in the upper airway and velocity at the throat decrease post-surgery. Shear stress on the airway walls also decreased markedly. These trends were expected, however more patients must be analyzed and correlations must be drawn between these fluid dynamic parameters and the pathophysiology of the upper airway in OSA.

Improvement in Obstructive Sleep Apnea (OSA) in Super Morbidly Obese Patients After Bariatric Surgery

2020 ◽  
Vol 103 (8) ◽  
pp. 725-728
Keyword(s):  
Bariatric Surgery ◽  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Lifestyle Modification ◽  
Apnea Hypopnea Index ◽  
Morbidly Obese ◽  
Obese Patients ◽  
Obstructive Sleep ◽  
Objective Evidence

Background: Lifestyle modification is the mainstay therapy for obese patients with obstructive sleep apnea (OSA). However, most of these patients are unable to lose the necessary weight, and bariatric surgery (BS) has been proven to be an effective modality in selected cases. Objective: To provide objective evidence that BS can improve OSA severity. Materials and Methods: A prospective study was conducted in super morbidly obese patients (body mass index [BMI] greater than 40 kg/m² or BMI greater than 35 kg/m² with uncontrolled comorbidities) scheduled for BS. Polysomnography (PSG) was performed for preoperative assessment and OSA was treated accordingly. After successful surgery, patients were invited to perform follow-up PSG at 3, 6, and 12 months. Results: Twenty-four patients with a mean age of 35.0±14.0 years were enrolled. After a mean follow-up period of 7.8±3.4 months, the mean BMI, Epworth sleepiness scale (ESS), and apnea-hypopnea index (AHI) significantly decreased from 51.6±8.7 to 38.2±6.8 kg/m² (p<0.001), from 8.7±5.9 to 4.7±3.5 (p=0.003), and from 87.6±38.9 to 28.5±21.5 events/hour (p<0.001), respectively. Conclusion: BS was shown to dramatically improve clinical and sleep parameters in super morbidly obese patients. Keywords: Morbid obesity, Bariatric surgery, Obstructive sleep apnea (OSA)

Three-year effects of bariatric surgery on obstructive sleep apnea in patients with obesity grade 1 and 2: a sub-analysis of the GATEWAY trial

2021 ◽  
Vol 45 (4) ◽  
pp. 914-917
Author(s):  
Sofia F. Furlan ◽  
Luciano F. Drager ◽  
Renato Nakagawa Santos ◽  
Lucas P. Damiani ◽  
Angela Cristine Bersch-Ferreira ◽  
...  
Keyword(s):  
Bariatric Surgery ◽  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Obstructive Sleep
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