Dysbaric osteonecrosis (DON) is the destruction of bone tissue in the long bones, hips and shoulders associated with diving and compressed-air work. Dysbaric osteonecrosis is a term used to describe aseptic or avascular bone necrosis due to ischemia caused by gas bubbles, although the exact mechanism is. Dysbaric osteonecrosis (DON) was first identified in the s and was found to be relatively common in the s and early s in some.

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Divers such as fishermen who decompress empirically instead of following standard decompression procedures are at high risk.

The risk increased with greater deviations from safe decompression procedures. A questionnaire was used to obtain clinical and diving information, including diving experience and maximum diving depth. Bone lesions in compressed air workers, dysbaaric special reference to men who worked on the Clyde Tunnels to More on this topic Cardiovascular risk profile of patients with psoriatic arthritis compared to controls—the role of inflammation.

The most important thing is to avoid repetitive diving and long bottom times. Dysbaric osteonecrosis DON is a complication of ineffective decompression following exposure to high-pressure environments.

Dysbaric osteonecrosis – Wikipedia

Ohta Y, Matsunaga H. Author Information Authors Tyler C. Technical divers may be at greater risk of DON than recreational divers, but limited sample sizes make it difficult to say with certainty. There are very few reported cases, and some of these may have dysnaric from causes other than diving.


Dysbaric osteonecrosis

Diving should be restricted to shallow depths. White ; Jeffrey S. Diving chamber Diving medicine Hyperbaric osteonecrosiss Hyperbaric treatment schedules In-water recompression Oxygen therapy Therapeutic recompression. This is also consistent with the fact that the incidence of avascular necrosis from all causes is more common in men as well. Obese divers should be careful, too.

It has been generally accepted that gas bubbles probably by initiating intramedullary venous stasis are the prime cause of dysbaric osteonecrosis, as well as being responsible for Type 1 Decompression Sickness or ‘the bends’. Affilations osteonecrozis Louisiana State University.

Gallery of photos Examples of the clinical practice. J Bone Joint Surg.

Alert Diver | Dysbaric Osteonecrosis in Recreational Diving

After being first identified, osteonecrotic lesions are typically observed radiologically to monitor for any changes or potentially self-resolution. Ostoenecrosis contract partner of the Croatian Institute for Health Insurance. The patient may report pain that radiates from the joint down the limb as well as restriction of the range of motion. The DON lesions characteristically occur in long bones that contain fatty marrow, such as the humerus, femur and tibia [ 4 ].

Dysbaric osteonecrosis: a reassessment and hypothesis.

Receiver operating characteristic curves were used to find the optimal cut-off level for clinical and haematological information, i. Necrosis of the proximal femur in Ficat stage 0-II can potentially benefit from oral bisphosphonate treatment to prevent femoral head collapse. Related articles in Web of Science Google Scholar.


The most commonly involved region is the hip joint, specifically the proximal femur, with bilateral dysbaruc not being uncommon.

Fondi C, Franchi A. If the diver has not been exposed to excessive depth and decompression and presents as DON, there may be a predisposition for the condition. Normal x-ray, normal MRI, no symptoms.

One recent work suggested anticoagulation therapy might reduce the risk of DON, but many side effects, particularly bleeding, outweigh the potential benefit, and thus it is not recommended. However, some recreational divers exceed these limits by engaging in harvesting or other commercial activities or by practicing extreme exposures as in technical diving.

This page was last edited on 12 Decemberat Cholesterol and triglyceride levels were measured by enzymatic methods [ 1011 ]. Dyzbaric observation of a significant association between maximum diving depth and development of DON corroborates this finding.