Screening for sleep-disordered breathing in a bariatric population

Area of Science:

• Medical Research
• Sleep Medicine
• Surgical Pre-assessment

Background:

• Obstructive sleep apnea (OSA) is a common sleep-disordered breathing condition linked to obesity.
• Obese patients undergoing general anesthesia for surgery are at risk if OSA is undiagnosed.
• Pre-operative assessment is crucial for identifying OSA in bariatric patients needing respiratory management.

Purpose of the Study:

• To determine the prevalence of undiagnosed OSA in patients seeking bariatric surgery.
• To identify bariatric patients who would benefit from peri-procedural respiratory management.
• To evaluate the utility of the STOP-BANG questionnaire and pulse oximetry in screening.

Main Methods:

• Screening bariatric surgery candidates using the STOP-BANG questionnaire.
• Performing home-based nocturnal pulse oximetry for patients scoring >4.
• Defining OSA severity by the 4% oxygen desaturation index (ODI) and physician review.

Main Results:

• 73% of patients exhibited some degree of sleep-disordered breathing.
• Severe OSA (9%), moderate OSA (13%), and mild OSA (24%) were diagnosed.
• 54% of patients required no treatment, while others received CPAP or mandibular advancement devices.

Conclusions:

• OSA is highly prevalent in bariatric surgery patients.
• Nearly three-quarters of this cohort have sleep-disordered breathing.
• Approximately half of the patients require a perioperative respiratory management plan.