Potentially life-threatening sleep apnea is unrecognized without aggressive evaluation

Area of Science:

• Bariatric Surgery
• Sleep Medicine
• Pulmonology

Background:

• Morbidly obese patients undergoing bariatric surgery often present with severe comorbidities.
• Obstructive sleep apnea (OSA) is a common comorbidity in this population.
• There is a suspicion of underdiagnosis of OSA in patients seeking bariatric surgery.

Purpose of the Study:

• To compare the diagnostic rates of obstructive sleep apnea (OSA) before bariatric surgery.
• To evaluate the effectiveness of clinical parameters versus mandatory testing for OSA diagnosis.

Main Methods:

• A retrospective chart review of a bariatric surgery database was performed.
• Two eras were compared: Era 1 (OSA evaluation based on clinical parameters) and Era 2 (mandatory OSA evaluation for all patients).

Main Results:

• Approximately 19% of patients had a pre-existing OSA diagnosis in both eras.
• Clinical evaluation in Era 1 increased OSA diagnosis to 56%.
• Mandatory polysomnography testing in Era 2 increased OSA diagnosis to 91%.

Conclusions:

• Obstructive sleep apnea (OSA) is substantially underdiagnosed in patients with morbid obesity undergoing bariatric surgery.
• Clinical evaluation alone misses a significant number of OSA cases.
• Mandatory polysomnography for OSA screening prior to bariatric surgery is recommended.