Decompression sickness practices in lobster diving among the indigenous Miskito people, who face great economic pressures. At that time it was estimated that in the country over 2000 divers had been injured and 300 others had died since the 1970s. In the United States, it is common for medical insurance not to cover treatment for the bends that is the result of recreational diving. This is because scuba diving is considered an elective and "high-risk" activity and treatment for decompression sickness is expensive. A typical stay in a recompression chamber will easily cost several thousand dollars, even before emergency transportation is included.
Physiology of decompression the sampling used in decompression studies to identify highly reflective gas bubbles. Detection of venous gas bubbles by ultrasound imaging is a sensitive, but not specific, predictor of adverse effects of decompression, similar to the published relationship between Doppler detected bubbles and decompression sickness. The correlation between Doppler-detected intravascular bubbles and decompression sickness is that almost all divers who developed DCS after a dive produced large numbers of bubbles, but even grade 3 or 4 bubbles could manifest without signs or symptoms of DCS, and grades 0, 1 and 2 bubbles are associated with very low risk. In a series