Category: R

Raised red streaks seen on esophageal or gastric varices during endoscopy. They suggest that the varices have a high likelihood of rupture and bleeding.  

A species that normally feeds on other insects but sometimes preys on humans. In some cases the bite may transmit Trypanosoma cruzi, a protozoan responsible for Chagas’ disease.  

A family of the order Hemiptera, including the assassin bugs.  

A rare psychiatric disorder in which the patient is convinced that the environment in which he is living has been duplicated brick by brick and leaf by leaf in another location. It is usually diagnosed in people who have suffered a focal brain injury (e.g., to the right hemisphere of the brain).  

The atom that is oxidized in an oxidation-reduction reaction.  

A substance that loses electrons easily and therefore causes other substances to be reduced (e.g., hydrogen sulfide, sulfur dioxide). A substance that adds hydrogen to a chemical compound or subtracts oxygen from the compound.  

Policies or procedures that must be adhered to without compromise to prevent avoidable error or harm.  

Combined form indicating oxidation-reduction system or reaction.  

A term used in aerospace medicine to describe what happens to the vision and central nervous system (i.e., seeing red and perhaps experiencing unconsciousness) when the aircraft is doing part or all of an outside loop at high speed, or any other maneuver that causes the pilot to experience a negative force of gravity. The…

An adverse anaphylactoid reaction to vancomycin therapy, causing pruritus, flushing, and erythema of the head and upper body. The condition is caused by release of histamine. It can be prevented by slowing the infusion rate.