Category: V
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Viscous resistance
Non-elastic opposition of tissue to ventilation due to the energy required to displace the thorax and airways.
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Valvular regurgitation
A backflow of blood through a valve, especially a heart valve, that is not completely closed as it would normally be.
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Viscerosensory reflex
Pain or tenderness elicited in somatic structures (skin and muscle) caused by visceral disorder.
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Visceromotor reflex
Contraction or tenseness of the skeletal muscles resulting from painful stimuli originating in visceral organs.
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Visceral reflex
Any reflex induced by stimulation of the visceral nerves.
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Vestibulocollic reflex
A reaction that stabilizes the position of the head according to sensory information from the labyrinth of the ear and the nerves in the neck.
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Vasomotor reflex
The constriction or dilatation of a blood vessel in response to a stimulus, as in becoming pale from fright.
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Vital red
A stain used in preparing tissues for microscopic examination.
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Ventricular puncture
Puncture of a ventricle of the brain for purpose of withdrawing fluid or introducing air for ventriculography.
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Venous plexus foot pump
A device that alternates between applying pressure and no pressure on the sole of the foot. The change in pressure allows venous blood vessels to alternately fill and then empty, thus imitating the effects of walking on the veins of the lower extremities. The pump is used to prevent deep vein thromboses (DVTs) in patients…