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Versant
Versant A test for the determination of HIV and hepatitis virus.
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Hepatitis
Inflammation of the liver. Hepatitis can be caused by viruses, bacteria, alcohol, toxic chemicals, and certain drugs. Symptoms include jaundice (yellowish skin caused by the buildup of bile pigments in the body), fever, appetite loss and gastrointestinal upset.
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Versapen
Versapen is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): hetacillin.
Versapen-k
Versapen-k is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): hetacillin potassium.
Versed
Versed is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): midazolam hydrochloride.
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Vertical dimension
Arbitrary space between upper and lower jaws upon closure; may decrease over time due to wear, shifting or damage to the teeth.
Valgus
Lateral deviation of the segment of the limb distal to a joint (e.g. 'knock knee').
Varus
Medial deviation of the segment of the limb distal to a joint (e.g. 'bow-legged').
Viscosupplementation
Injection therapy for osteoarthritis (mainly of the knee). Contains hyaluronic acid - a very viscous substance normally found in joint fluid but that is reduced in this condition.
Viadur
Viadur (leuprolide acetate implant) is a unique once-yearly implant for the palliative treatment of advanced prostate cancer.
Versant
Visual Evoked Potential (VEP)
See Visual Evoked Response.
Visual Evoked Response (VER)
The VER is a test of the function of the visual pathways from the retina, along the optic nerve and optic tract to the early parts of the visual centers of the brain. Usually, EEG electrodes are placed on the head and the patient is required to view a flashing light and an alternating pattern (e.g., stripes or checks) on a TV. The VER is a diagnostic test for such things as Multiple Sclerosis, optic neuritis, optic neuropathies, cortical visual impairment and certain types of brain tumors. The pattern VER can also provide an objective estimate of a patient's visual acuity, even if the patient is nonverbal (e.g., too young, comatose or mentally impaired).
Visual suppression
This occurs when the brain ignores the visual image being transmitted from one eye. It is not voluntary. In the younger child it is associated with strabismus and amblyopia. An eye that is misaligned or is out of focus is likely to be suppressed by the child.
Vision therapy
Vision Therapy is a term that refers to a mixture of so-called "therapies" that employ eye movement tasks, eye-hand coordination tasks, 3D tasks, etc., which purportedly improve everything from golf games to dyslexia to reading problems in children and adults. The vast majority of these claims are unsubstantiated. Vision therapy is usually not covered by insurance. Warning: before signing-up for Vision therapy, ask the provided to support his or her claims with scientific evidence that has been published in a peer reviewed scientific journal. Be skeptical of therapies that seem to good to be true - Caveat emptor.
Vitreous
The transparent, solid, gelatinous material which fills the interior of the eye behind the lens. It allows the eye to maintain its shape.
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