Dictionary

vesicle 1 In dermatology, a tiny skin blister. 2 In anatomy, a small pouch.

vesicle, seminal See seminal vesicle.

vesicoureteral reflux The abnormal back flow of urine from the bladder into the ureters toward the kidneys. Abbreviated VUR. VUR is most commonly diagnosed during infancy and childhood and can be due to a congenital dysfunction in the valve where the ureter enters the bladder or to an acquired blockage in the urinary tract. VUR…

venereal warts See genital warts.

venlafaxine A unique antidepressant drug (brand name: Effexor) that is prescribed to treat depression. Venlafaxine is believed to affect the neurotransmitters serotonin, norepinephrine, and dopamine, but not monoamine oxidase (MAO). Venlafaxine is not usually indicated for use by people with kidney or liver disease, or by those with high blood pressure. Common side effects include…

venom A poison, particularly one secreted by an animal. Examples are bee venom, snake venom, scorpion venom, and spider venom. Snake venom is also called venin.

venous aneurysm A localized widening and bulging of a vein. At the area of a venous aneurysm, the vein wall is weakened and may rupture.

venous catheterization The insertion of a tiny tube (catheter) into a peripheral or central vein to deliver fluids or medication. Venous catheterization is the most frequently used method for administration of IV fluids. The most common complication of venous catheterization is infection at the site of the catheter (catheter sepsis).

vent To air one’s feelings by putting problems into words.

ventilation 1 The exchange of air between the lungs and the atmosphere so that oxygen is exchanged for carbon dioxide in the alveoli (the tiny air sacs in the lungs). 2 When a person (or persons) airs out their feelings by putting their problems into words.

ventilator A machine that mechanically assists a patient in the exchange of oxygen and carbon dioxide, a process sometimes referred to as artificial respiration.

ventricle A chamber of an organ. For example, the four connected cavities in the central portion of the brain are called ventricles.