What is the primary difference between DCS Type I and DCS Type II?

Diving-related decompression sickness (DCS) is categorized into two types that differ significantly in their symptoms and the areas of the body they affect. Type I is primarily characterized by joint pain, often described as the "bends," which typically occurs in the larger joints of the body, such as the elbows, knees, and shoulders. The onset of Type I symptoms usually occurs shortly after a diver ascends too quickly or does not follow proper decompression protocols.

In contrast, Type II symptoms involve more severe complications, including neurological effects and cardiopulmonary issues. This can manifest as altered mental status, weakness, or even paralysis, indicating that the central nervous system has been impacted. Additionally, Type II can also affect the lungs, leading to respiratory problems.

Recognizing the distinction between these two types of DCS is crucial for divers and medical personnel since the management and treatment may vary considerably based on the type of symptoms present. Therefore, understanding that Type I primarily presents with joint pain while Type II is associated with serious neurological and cardiopulmonary symptoms is essential for effective diagnosis and treatment of decompression sickness.