What characterizes pulmonary DCS (chokes)?

What characterizes pulmonary DCS (chokes)?

• A. N2 bubbles block the smaller pulmonary vessels
• B. N2 bubbles trapped in brain
• C. N2 bubbles cause skin itching
• D. N2 bubbles in joints

Answer: (A)

Pulmonary decompression sickness, the chokes, is defined by nitrogen bubbles forming in the pulmonary circulation and obstructing the small pulmonary vessels. This mechanical blockage impairs gas exchange, leading to rapid onset dyspnea, chest tightness, cough, and potential hypoxemia. The bubbles originate from dissolved nitrogen coming out of solution during ascent. Other forms of DCS involve bubbles in the brain (causing neurologic symptoms), skin (itching or mottling), or joints (the bends), but the hallmark of the pulmonary form is the obstruction of small pulmonary vessels.

Pulmonary decompression sickness, the chokes, is defined by nitrogen bubbles forming in the pulmonary circulation and obstructing the small pulmonary vessels. This mechanical blockage impairs gas exchange, leading to rapid onset dyspnea, chest tightness, cough, and potential hypoxemia. The bubbles originate from dissolved nitrogen coming out of solution during ascent. Other forms of DCS involve bubbles in the brain (causing neurologic symptoms), skin (itching or mottling), or joints (the bends), but the hallmark of the pulmonary form is the obstruction of small pulmonary vessels.