Category: I

A catheter inserted into a vein to administer fluids or medications or to measure pressure.  

A catheter coated with a medication designed to prevent complications of prolonged insertion in the body. Commonly used coatings include antibiotics and antiseptics.  

An early cataract, too poorly developed to require therapy.  

One who harbors an infectious organism (e.g., methicillin-resistant Staphylococcus aureus in the nasal passages) from time to time, but not continuously.  

One who harbors and spreads an infectious organism during the incubation period of a disease before it becomes clinically evident.  

One of the two distinct stages in the development of a carious dental lesion. The first stage is the incipient lesion, marked by the appearance of a white spot. Microscopic pores course through the enamel to the subsurface demineralization, where the main body of the lesion is located.  

Heart muscle weakness of occult or uncertain cause, possibly due to viral infections, unrecognized toxic exposures, or a genetic predisposition, but not to ischemia, hypothyroidism, hypertension, valvular disease, or alcohol abuse.  

A non-invasive means of determining cardiac output in which the stroke volume of ceach cardiac contraction is determined by measuring beat-to-beat changes in the electrical impedance of the chest and neck.  

An electrode having a carbon shell with a core of various metals or salts of metals for use in a carbon arc lamp.  

The alimentary canal from the stomach to the anus.