Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «V»:
Venereal disease: A disease that is
contracted and transmitted by sexual contact, caused by
microorganisms that survive on the skin or mucus membranes,
or that are transmitted via semen, vaginal secretions, or
blood during intercourse. Because the genital areas provide
a moist, warm environment...
Venereal Disease Research Laboratory test
Venereal Disease Research Laboratory test: A blood test for syphilis. Venereal Disease Research Laboratory is commonly abbreviated VDRL.
A negative ("nonreactive") VDRL is compatible with a person not having syphilis. However, a person may a negative VDRL and still have syphilis since, in the early ...
Venereal wart: A wart that is confined primarily to
skin of the genitals. These warts are due to viruses belonging to the
family of human papilloma viruses
(HPVs) which are transmitted through sexual contact. The virus can
transmitted from mother to baby during childbirth. Most ...
Venin: Snake venom (poison)....
Venipuncture: The puncture of a vein with a needle to withdraw blood. Also called phlebotomy or, more often, a blood draw....
Venom: A poison, particularly one secreted by an animal. For examples, bee venom, snake venom, scorpion venom, and spider venom. Snake venom is also called venin....
Venom, scorpion: The potent poison of the scorpion. A sting can be fatal to a person who is allergic to it.
A scorpion is an insect that has an elongated body and a segmented, curved tail tipped with a venomous stinger. Grasping, fingerlike first appendages are other typical features.
The toxicity o...
Venomous: 1. Full of venom.
2. Having venom, like some snakes and insects.
3. By extension, noxious, as a venomous tongue....
Venous aneurysm: A local widening
and bulging (an aneurysm) of a vein. As opposed to an
arterial aneurysm or a cardiac aneurysm. An aneurysm is a
localized widening (dilatation) of an artery, vein, or the
heart. At the area of an aneurysm, there is typically a
bulge and the wall is weakened a...
Venous catheter, central
Venous catheter, central: See: Catheter, central venous....
Venous catheterization: See: Catherization, venous....
Venous claudication: Limping and/or pain due to inadequate venous drainage, poor return of blood by the veins, from the legs....
Venous line, central
Venous line, central: A catheter (tube) that is passed through a vein to end up in the thoracic (chest) portion of the vena cava (the large vein returning blood to
the heart) or in the right atrium of the heart.
Central venous lines have a number of different uses. A central venous line allows co...
Ventilation: The exchange of air between the lungs and the atmosphere so that oxygen can be exchanged for carbon dioxide in the alveoli (the tiny air sacs in the lungs).
In pulmonary medicine, a distinction is made between pulmonary and alveolar ventilation. Pulmonary ventilation refers to the tota...
Ventilation, mechanical: Use of a machine called a ventilator or respirator to improve the exchange of air between the lungs and the atmosphere....