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DAN Medical Research What is the study about? The Flying After Diving Study is designed to evaluate the effect of altitude exposure following diving on the production of circulating bubble production and / or the development of decompression sickness. Where do we go diving? This study involves a chamber dive, followed by a surface interval and then a chamber flight at a pressure equivalent to that a commercial aircraft cabin. All trials are conducted at the Center for Hyperbaric Medicine and Environmental Physiology (Hyperbaric Center) in Duke University Medical Center, Durham, NC. Do I bring any gear? What should I wear? Subjects are randomly assigned to dry or wet exercise during the dive. Dry exercise requires comfortable shorts, shirt and shoes for cycling. Wet exercise requires bathing suits and the option of personal mask and wet boots. We ask that females wear a two-piece bathing suit, shorts and halter top or aerobic-type top and bottoms. The abdomen, front and back and the chest and legs need to be exposed for the physical examination. The abdomen and as much of the rib cage as possible need to be accessible to facilitate the ultrasound monitoring. How do we receive our compensation? Participants are paid by check sent to the address supplied on the Compensation Form (DUMC Research Subject Registration Form). Checks usually arrive within four to five weeks. What is a typical study like? Participants arrive at the Hyperbaric Center and receive a detailed briefing on the study before providing written consent to participate. Then follows physical examination, body composition estimation and ultrasound assessments. The dive follows, usually two hours from arrival. The flight follows after the scheduled surface interval. There is a four-hour medical watch after the flight, largely filled by a leisurely meal. Post-flight interviews are completed on each of the two mornings following the flight. What can I bring inside the chamber? Nothing for the dive and a book to read during the flight. What if I develop symptoms? The Hyperbaric Center regularly conducts both clinical and research exposures. Any research subject developing symptoms associated with the study will receive immediate medical care at no cost to them. Protocols are in place to ensure the timely response and management of cases. What is a typical trial schedule? Experiments can take one or two days plus follow-up. The dive and flight activities are combined into a single day when short surface intervals are being tested. Example Study Schedule (based on a long [24-hour] surface interval). Please be advised that this is a sample schedule. The study schedule that you will be participating in will be sent to you by DAN Research at least one week prior to the study date. Day 1 |
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