Obstructive Sleep Apnea, Predictors and Bariatric Surgery

Overview

Obstructive sleep apnea is defined as a repetitive collapse of the pharynx during sleep (Malhotra, et al. 2012) which cases intermittent hypoxia. Snoring, witnessed apnea, fatigue and morning headache are symptoms of the disease which has severe health effect (Malhotra. et al. 2012) including increased mortality risk (Ensrud. et al. 2012) and effects on quality of life (Kuhn. et al. 2017). Obesity, male sex and age are all risk factors for obstructive sleep apnea (Schwartz. et al. 2010, Edwards. et al. 2010) . Bariatric surgery is known to be a good treatment to achieve a sustained weight loss but the long term effects of bariatric treatment of obstructive sleep apnea is not well studied. The aim of this study is therefore to study the long effects of bariatric surgery as a treatment for obstructive sleep apnea and to find predictors that can be used to predict the severity of the disease.

Full Title of Study: “Effect of Bariatric Surgery on Obstructive Sleep Apnea and Predictors for the Severity of Obstructive Sleep Apnea”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Non-Randomized
    • Intervention Model: Parallel Assignment
    • Primary Purpose: Treatment
    • Masking: None (Open Label)
  • Study Primary Completion Date: December 30, 2017

Detailed Description

Obstructive sleep apnea is defined as a repetitive collapse of the pharynx during sleep (Malhotra, et al. 2012) which cases intermittent hypoxia. Snoring, witnessed apnea, fatigue and morning headache are symptoms of the disease which has severe health effect (Malhotra. et al. 2012) including increased mortality (Ensrud. et al. 2012) and effects on quality of life (Kuhn. et al. 2017). Hence, identifying and treat obstructive sleep apnea are important. Obesity, male sex and age are all risk factors for obstructive sleep apnea (Schwartz et. al. 2010, Edwards. et. al. 2010) . Bariatric surgery is known to be a good treatment to achieve a sustained weight loss but the long term effects of bariatric treatment of obstructive sleep apnea is not well studied. The aim of this study is therefore to study the long effects of bariatric surgery as a treatment for obstructive sleep apnea and to find predictors that can be used to predict the severity of the disease. Eighty-six patients with obesity have been recruited at the Catholic University hospital in Rome, Italy during 2012 when patients were enrolled during their evaluation for bariatric surgery. At baseline, the patient underwent fasting blood chemistry, anthropometric measurements and overnight polysomnography. The patients also underwent a 3 hour oral glucose tolerance test in order to determinate glucose tolerance (normal glucose tolerance, impaired glucose tolerance and type 2 diabetes mellitus). Patient then received treatment with bariatric surgery (gastric sleeve, biliopancreatic diversion or gastric bypass) during 2012-2013 or decided not to undergo bariatric surgery. Patient will undergo follow-up during 2016-2017 where fasting blood chemistry, anthropometric measurements and overnight polysomnography will be assessed. The patient will also undergo a 3 hour oral glucose tolerance test. The effects of bariatric surgery on obstructive sleep apnea will then be evaluated. Differences in the treatment effect between the different bariatric surgical procedures will be studied. Patients characteristics at baseline, such as weight, height, BMI and components of the metabolic syndrome and their association to the severity of obstructive sleep apnea will be studied in order to find predictors for the severity of the disease.

Interventions

  • Procedure: Bariatric surgery
    • Bariatric surgery includes several different types of surgical procedures used to achieve weight loss.

Arms, Groups and Cohorts

  • Active Comparator: Biliopancreatic diversion
    • Study participants will undergo biliopancreatic diversion which is a type of bariatric surgery where a part of the stomach are removed and the remaining stomach is attached to a distal segment of the small intestine.
  • Active Comparator: Gastric sleeve
    • Study participants will undergo sleeve gastrectomy which is a restrictive form av bariatric surgery where the size of the stomach is reduced.
  • Active Comparator: Gastric bypass
    • Study participants will undergo gastric bypass which is a type of bariatric surgery where a small pouch of the stomach is created and attached to a segment of the small intestine.
  • No Intervention: No intervention
    • Study participants that do not want to undergo surgical treatment.

Clinical Trial Outcome Measures

Primary Measures

  • Change in severity of obstructive sleep apnea measured by a overnight cardio-respiratory monitoring before and 5 years after bariatric surgery.
    • Time Frame: 5 years
    • The effect of bariatric surgery as a treatment of obstructive sleep apnea in patients with obesity will be evaluated as the change in obstructive sleep apnea severity. To address this aim a overnight cardio-respiratory monitoring with a Vital Night 8 device (Vital Aire, Milan, Italy) will be performed before and 5 years after bariatric surgery.

Participating in This Clinical Trial

Inclusion Criteria

  • BMI above 30 kg/m2 – Age between 20 and 70 years – Willingness to understand the protocol and willingness to participate in the study Exclusion Criteria:

Exclusion criteria is severe co-morbidities that would prevent the patients to undergo bariatric surgery. Such as severe anemia, severe heart failure, active or previous malignancies the last 5 years. Myocardial infarction or unstable angina pectoris the last 6 months. Pregnancy. Suspected poor compliance. Drug or alcohol abuse. Major gastrointestinal disease.

  • Inability to undergo polysomnography.

Gender Eligibility: All

Minimum Age: 20 Years

Maximum Age: 70 Years

Are Healthy Volunteers Accepted: No

Investigator Details

  • Lead Sponsor
    • Catholic University of the Sacred Heart
  • Provider of Information About this Clinical Study
    • Principal Investigator: Geltrude Mingrone, Professor – Catholic University of the Sacred Heart
  • Overall Official(s)
    • Geltrude Mingrone, MD. PhD., Principal Investigator, The Catholic University of the Sacred Heart

References

Malhotra A, White DP. Obstructive sleep apnoea. Lancet. 2002 Jul 20;360(9328):237-45. doi: 10.1016/S0140-6736(02)09464-3.

Ensrud KE, Blackwell TL, Ancoli-Israel S, Redline S, Cawthon PM, Paudel ML, Dam TT, Stone KL. Sleep disturbances and risk of frailty and mortality in older men. Sleep Med. 2012 Dec;13(10):1217-25. doi: 10.1016/j.sleep.2012.04.010. Epub 2012 Jun 15.

Kuhn E, Schwarz EI, Bratton DJ, Rossi VA, Kohler M. Effects of CPAP and Mandibular Advancement Devices on Health-Related Quality of Life in OSA: A Systematic Review and Meta-analysis. Chest. 2017 Apr;151(4):786-794. doi: 10.1016/j.chest.2017.01.020. Epub 2017 Jan 24.

Schwartz AR, Patil SP, Squier S, Schneider H, Kirkness JP, Smith PL. Obesity and upper airway control during sleep. J Appl Physiol (1985). 2010 Feb;108(2):430-5. doi: 10.1152/japplphysiol.00919.2009. Epub 2009 Oct 29.

Edwards BA, O'Driscoll DM, Ali A, Jordan AS, Trinder J, Malhotra A. Aging and sleep: physiology and pathophysiology. Semin Respir Crit Care Med. 2010 Oct;31(5):618-33. doi: 10.1055/s-0030-1265902. Epub 2010 Oct 12.

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