DHCA
Also written as: DHCA — Deep Hypothermic Circulatory Arrest
Deep hypothermic circulatory arrest used in complex cardiac surgeries requiring temporary cessation of circulation.
Full Definition
Deep hypothermic circulatory arrest is a surgical technique where the patient's body temperature is lowered to 15-20°C and circulation is temporarily stopped. This allows surgeons to operate on complex cardiac structures in a bloodless field while protecting vital organs. The technique is commonly used in aortic arch repairs, complex congenital heart surgery, and procedures requiring extensive surgical exposure. Safe arrest times are typically limited to 30-45 minutes depending on the degree of hypothermia achieved.
Usage
Usage note: Always capitalize as DHCA; avoid confusion with HCA (hypothermic circulatory arrest) which may not specify depth of cooling.
In Context
- "The surgeon planned DHCA for the complex aortic arch reconstruction." — operative report
- "Neurological monitoring during DHCA showed satisfactory cerebral protection." — anesthesia record