Residual Volume

Anatomical folds especially of the viscera.

An elastic substance obtained from the latex of many tropical plants, especially Hevea braziliensis (rubber tree). It is present in over 40,000 products in the medical and consumer industry. The processing of hard rubber products from crumb or sheet rubber for drug vials caps, table leg cover, etc. is much lower in allergen content than those made by dipping a former into liquid natural rubber latex. SEE latex.

Respiratory Syncytial Virus

Respiratory Quotient

Radiofrequency Annuloplasty

The portion of the respiratory system consisting of gas-exchange units called alveoli. Organized into respiratory bronchioles, alveolar ducts, and alveolar sacs. Such structures make up an acinus, or functional unit of the lung, collectively forming the parenchyma of the organ. SEE acinus, parenchyma.

Recurrence of stenosis after corrective surgery (heart valve, narrowed artery, etc.).

Amount of energy expended 2 hours post-absorption of a meal under conditions of rest and thermal neutrality; approximately 10% higher than basal metabolic rate (BMR).

Of the operating room suite – an area where masks as well as scrub attire must be worn. This area includes the actual operating room and other areas where sterile procedures are performed or sterile devices and fields are exposed.