Category: C

  • Charle’s law

    At constant pressure, a given amount of gas expands its volume in direct proportion to the absolute temperature.  

  • Customary and reasonable charge

    The usual cost of a specific service to a patient. The term is used in the medical insurance industry to determine the amount the provider will be reimbursed for the service or procedure. Under Medicare, this is the lowest customary charge by a physician for a service or the prevailing charge of other area physicians…

  • Covered charge

    A medical service that is reimbursable by a third-party payer.  

  • Charcot-leyden crystal

    A type of colorless, hexagonal, double-pointed, often needle-like crystal found in the sputum in asthma and bronchial bronchitis or in the feces in ulceration of the intestine, especially amebiasis.  

  • Charcot-bouchard aneurysm

    A micro aneurysm in a small artery of the brain thought, in the past, to be a cause of intracranial hemorrhage.  

  • Chaotropic agent

    An ion that disrupts membranes, nucleic acids, and proteins.  

  • Channelopathy

    A disease that results from a mutation in an ion channel in a cell membrane (e.g., from a mutation that alters the uptake of an electrolyte such as sodium, potassium, or calcium by a cell).  

  • Change-of-shift

    That time during the working day when one group of health care professionals arrive for work and another group prepares to leave. At this juncture reports about patients are relayed from one group to another and tasks that need to be accomplished are assigned.  

  • Champissage

    An ancient Hindu technique of scalp massage. It is promoted as a means of combating hair loss. The shoulders and neck are sometimes included in the treatment.  

  • Chamberlain procedure

    Incision into the mediastinum through an incision made next to the sternum. The procedure is used to obtain specimens for biopsy or laboratory analysis, as an alternative to mediastinoscopy.