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Von Thesling GH, Coffman CB, Hundemer GL, Stuart RP. In-flight urine collection device: efficacy, maintenance, and complications in U-2 pilots. Aviat Space Environ Med 2011; 82:116–22. Introduction: Urine collection systems for in-flight use have gradually improved over the past 50 yr; however, current management of urine evacuation remains suboptimal. This is a cross-sectional survey-based study on the current urine collection device employed in the U.S. Air Force's U-2S airframe, examining efficacy, problems with wear, device maintenance, and complaint reporting. Methods: An anonymous survey consisting of 18 questions was generated inquiring about problems with wear of the urine collection system, care of the device, and education. The survey was offered at Beale AFB and overseas U-2 locations to pilots with at least 180 h of flying experience with the airframe. Results: There were 57 subjects who completed the survey with 62.5% reporting complications, including mechanical dysfunction, pain and poor fit, skin irritation, allergic reaction, embarrassment, and urethral issues. Variation was seen in the degree of problem reporting and care of the device. Discussion and literature review is provided on in-flight and space urine collection and evacuation systems, sheath catheters, urine and contact dermatitis, urethritis, external catheter sizing methods, and psychological aspects of catheter use. Conclusions: The majority of surveyed pilots experienced various problems associated with wear of their urine collection device. Also, variation in reporting and care of the device exists. Potential improvements include standardization of fitting procedures and device maintenance, increased catheter draining capacity, use of skin barriers to urine, enhanced privacy measures, and incorporation of less injurious structural materials such as silicone.

Keywords: in-flight urination; sheath catheter; pressure suit; life support; incontinence; high-altitude; reconnaissance
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