This means things like postural hypotension, blood pressure changes and ability to react to cold water immersion. All of your neurological deficits should be carefully documented so that a diving physician will have this information available in case of an accident. If you have good circulation, a shunt should not be a problem since there is no air involved and there should be no pressure differentials from the changes in pressures of diving. If you have an open wound you must be aware of the increased risk of infection from pathogens in the seawater. Dr. Chris Edge feels that these people can dive with a disabled diving group and that none of their problems are insurmountable.
Shunts generally pose no problem as they are mostly closed off by adulthood.
Physical capacity to dive. Safety in water for diver and buddy. Risk of diving with symptoms and signs that could mimic DCI needing treatment. Possible loss of functional reserve should Neurological DCI supervene. Detailed assessment ant tailored diving care and instruction.