Category: S
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Synchronized intermittent mandatory ventilation
Periodic assisted ventilation with positive pressure initiated by the patient and coordinated with spontaneous patient breaths.
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Snake venom
The poisonous secretion of the labial glands of certain snakes. Venoms contain proteins, chiefly toxins and enzymes, which are responsible for their toxicity. They are classified as neurocytolysins, hemolysins, hemocoagulins, proteolysins, and cytolysins on the basis of the effects produced.
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Stellate splenic vein
Starlike venous plexuses on the surface of the kidney below its capsule.
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Small saphenous vein
A vein that drains blood from the lateral border of the superficial leg and foot and joins the popliteal vein.
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Spatial vectorcardiogram
Depiction of the vectorcardiogram in three planes frontal, sagittal, and horizontal.
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Septate vagina
A congenital condition in which the vagina is divided longitudinally into two parts. This division may be partial or complete.
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Smallpox vaccine
A vaccine used to provide immunity against smallpox, one of the deadliest infections in the history of humanity. The vaccine is made from live vaccinia virus (not from the smallpox virus ). Similarities between the two viruses make the vaccine about 95% effective in preventing smallpox in those people exposed to the virus. Smallpox vaccine…
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Sensitized vaccine
A vaccine prepared from bacteria treated with their specific immune serum. A vaccine formulated with inactivated pathogens, enhanced with the addition of the patient’s own antibody substances.
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Sympathetic uveitis
Severe, bilateral uveitis that starts as inflammation of the uveal tract of one eye resulting from a puncture wound. The injured eye is termed the “exciting eye.”
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Subinvolution of uterus
The lack of involution of the uterus following childbirth, manifested by a large uterus (greater than 100 g) and a continuation of lochia rubra beyond the usual time. It is caused usually by puerperal infection, overdistention of the uterus by multiple pregnancy or polyhydramnios, lack of lactation, malposition of the uterus, and retained secundines. Involution…