What is the meaning of decompression illness?
Decompression sickness is a disorder in which nitrogen dissolved in the blood and tissues by high pressure forms bubbles as pressure decreases. Symptoms can include fatigue and pain in muscles and joints.
How is decompression measured?
However for those recreational divers wanting to manually calculate when to take one, simply divide your max depth by two and do a 30 second to a minute stop there.
How does decompression illness happen?
When a diver swims to the surface too quickly (a rapid ascent), the nitrogen can form tiny bubbles in the blood and/or body tissues, causing decompression sickness (DCS). DCS may occur even if a person dives within the limits of their dive computer or decompression tables and even if they complete a safety stop.
What is Type 1 decompression sickness?
Type I decompression sickness (less severe) The less severe type (or musculoskeletal form) of decompression sickness, often called the bends, typically causes pain. The pain usually occurs in the joints of the arms or legs, back, or muscles. Sometimes the location is hard to pinpoint.
How many types of decompression illness are there?
Decompression illness, or DCI, is associated with a reduction in the ambient pressure surrounding the body. DCI encompasses two diseases, decompression sickness (DCS) and arterial gas embolism (AGE).
What are the symptoms of DCS?
Common symptoms of DCS may include:
- fatigue.
- weakness.
- pain in muscles and joints.
- headache.
- lightheadedness or dizziness.
- confusion.
- vision problems, such as double vision.
- stomach pain.
When is decompression required?
Decompression diving is appropriate when there’s no other way to reasonably accomplish the dive. This is most commonly due to depth because no stop time limits become very short below 100 feet. Shallow dives can require a decompression when they are long, however.
How do you calculate decompression time?
Accordingly, once the diver knows their planned depth and time, they can look up the most proximate ratio, calculate the difference in depths, and add or subtract the appropriate number of minutes from their total bottom time to give a total decompression time.
What are the risks of decompression sickness?
Lack of physical fitness, increased age, obesity, dehydration, physical injury, alcohol use during diving, repetitive dives, and traveling to altitude to dive are some of the risk factors that may lead to higher incidences of DCS.
What body system is affected by decompression sickness?
Type I decompression sickness tends to be mild and affects primarily the joints, skin, and lymphatic vessels. Type II decompression sickness, which may be life-threatening, often affects vital organ systems, including the brain and spinal cord, the respiratory system, and the circulatory system.
Why is decompression sickness called the bends?
Decompression sickness (DCS), known as ‘the bends’ because of the associated joint pain, is a potentially deadly condition caused by bubbles of nitrogen gas forming in the blood and tissues.