DAN Medical Research
Completed Studies

DAN Research has been involved in the completion of many important research projects, which have collected significant data. Completed research has been useful to many different groups, including researchers, the dive industry and recreational divers.

Non-Laboratory Studies

  • Aging Diver Study
    The objective of the Aging Diver Study was to evaluate the effects of age and associated medical conditions on dive style and dive outcome using PDE methodology.

  • Flying After Recompression Treatment Study
    In 2003, DAN conducted an online survey of divers who were recompressed for decompression illness (DCI) within the past five years and then flew. The survey was also sent to recompression chambers for completion. Flying after diving is a recognized DCI risk factor but what are the risk factors to flying after recompression therapy?

  • Diabetes & Diving
    Diabetes affects 16 million people in the United States, and approximately 700,000 of these are insulin-requiring. Although diabetes has been traditionally considered a contraindication to diving, Divers Alert Network discovered that persons with diabetes are diving and are assertive about their ability to do so.

  • U.S. Navy Survey
    The U.S. Navy asked DAN for assistance in conducting a survey of recreational divers to obtain information about diver demographics, dive experience, and diving habits. In early 1998, a randomly selected group of DAN Members received a four page survey form.

  • Liveaboard Doppler
    The use of Doppler-monitoring devices on divers in the field during the liveaboard Doppler study, DAN researchers assessed the effects of age, gender, and dive profiles on participants.

Laboratory Studies

  • Ascent Rate
    Most experts agree that ascent rates may significantly affect dive safety, but there is no available human data to suggest the correct rate. In February 1999, DAN began a series of human trials to provide that data. The Ascent Rate Study is evaluated ascent rates of 60 and 10 feet per minute after dives to 100 feet.

  • Breath-Hold
    The breath-hold project studied the effects of hyperventilation, work, breathing mixture and dive depth on immersed breath-hold duration. The primary objective of this study was to increase breathhold time to a maximal safe level without danger of loss of consciousness or functional incapacity due to hypocapnia, hypoxia, or hypercapnia.

  • DAN Flying After Diving
    Recreational divers frequently return home by air after diving holidays. However, past guidelines for how long to wait after diving before flying were unclear and often contradictory. DAN conducted a series of human trials from February 1993 to 1999 to provide such data.

  • 0xygen Rebreather
    Oxygen is usually provided by an open-circuit regulator or non-rebreathing mask to treat diving and other medical emergencies, but typical oxygen supplies can be exhausted in less than one hour - too soon for remote operations. This study tested and modified closed-circuit oxygen rebreathing circuits to develop the most suitable for remote duty first aid.

  • High Altitude Flying After Diving
    Military divers may be required to perform free-fall parachute operations after diving. Free-fall jumps may be made from higher than 25,000 ft. Decompression sickness (DCS) may occur, particularly after diving, with exposure to high altitude.

  • USN Flying After Diving Study
    Research into Flying After Diving (FAD) has been conducted at Duke University for many years. The USN FAD study is designed to test dive-flight profiles that are of interest to the U.S. Navy. This project was the second phase of the DAN Flying After Diving Study.