| saddle embolism | A straddling embolism at any vascular bifurcation, e.g., of the aorta which occludes both common iliac arteries. Synonym: pantaloon embolism. (05 Mar 2000) |
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| saddle | 1. A seat for a rider, usually made of leather, padded to span comfortably a horse's back, furnished with stirrups for the rider's feet to rest in, and fastened in place with a girth; also, a seat for the rider on a bicycle or tricycle. 2. A padded part of a harness which is worn on a horse's back, being fastened in place with a girth. It serves various purposes, as to keep the breeching in place, carry guides for the reins, etc. 3. A piece of meat containing a part of the backbone of an animal with the ribs on each side; as, a saddle of mutton, of venison, etc. 4. A block of wood, usually fastened to some spar, and shaped to receive the end of another spar. 5. <machinery> A part, as a flange, which is hollowed out to fit upon a convex surface and serve as a means of attachment or support. 6. <zoology> The clitellus of an earthworm. 7. The threshold of a door, when a separate piece from the floor or landing; so called because it spans and covers the joint between two floors. <medicine> Saddle bar, any thin plicated bivalve shaell of the genera Placuna and Anomia; so called from its shape. Synonym: saddle oyster. Origin: OE. Sadel, AS. Sadol; akin to D. Zadel, G. Sattel, OHG. Satal, satul, Icel. Sothull, Dan. & Sw. Sadel; cf. Russ. Siedlo; all perh. Ultimately from the root of E. Sit. Source: Websters Dictionary (01 Mar 1998) |
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| saddle anaesthesia | A form of spinal anaesthesia limited in area to the buttocks, perineum, and inner surfaces of the thighs. Synonym: saddle anaesthesia. (05 Mar 2000) |
| saddle-backed | 1. Having the outline of the upper part concave like the seat of a saddle. 2. Having a low back and high neck, as a horse. Source: Websters Dictionary (01 Mar 1998) |
| saddle block anaesthesia | A form of spinal anaesthesia limited in area to the buttocks, perineum, and inner surfaces of the thighs. Synonym: saddle anaesthesia. (05 Mar 2000) |
| saddle head | Craniosynostosis in which the upper surface of the skull is concave, presenting a saddle-shaped appearance in profile. Synonym: saddle head. Origin: clino-+ G. Kephale, head (05 Mar 2000) |
| saddle joint | A biaxial synovial joint in which the double motion is effected by the opposition of two surfaces, each of which is concave in one direction and convex in the other; as in the carpometacarpal joint of the thumb. Synonym: articulatio sellaris, articulatio ovoidalis. (05 Mar 2000) |
| saddle nose | A nose with markedly depressed bridge, seen in congenital syphilis or after injury from trauma or operation. (05 Mar 2000) |
| saddle-shaped | Shaped like a saddle. <botany> Specifically: Bent down at the sides so as to give the upper part a rounded form. <geology> Bent on each side of a mountain or ridge, without being broken at top; said of strata. Source: Websters Dictionary (01 Mar 1998) |
| tubercle of saddle | The slight elevation in front of the pituitary fossa (sella turcica) on the body of the sphenoid bone. Synonym: tubercle of saddle. (05 Mar 2000) |
| Turkish saddle | <anatomy> A transverse depression crossing the midline on the superior surface of the body of the sphenoid bone and containing the pituitary gland. It is named "turkish saddle" from its resemblance to the saddle used by turks. (12 Dec 1998) |
| air embolism | <physiology> A serious condition that results when air (in the form of bubbles) invades the blood vessels causing disruption of normal blood flow. (06 Aug 1998) |
| amniotic fluid embolism | Obstruction and constriction of pulmonary blood vessels by amniotic fluid entering the maternal circulation, causing obstetric shock. See: amniotic fluid syndrome. (05 Mar 2000) |
| arterial embolism | <cardiology, physiology> A sudden interruption in arterial blood flow to an organ or body part (extremity). The blockage is caused by a blot clot or atherosclerotic plaque that has moved through the arterial circulation from one position to another. The resulting mechanism is the same regardless of cause or location. Oxygen deprivation to the tissues distal to the occlusion become ischaemic and die (necrosis). Atrial fibrillation is a risk factor for arterial embolism due to the release of blood clots from the fibrillating heart. Blood vessel injury and increased levels of platelets can also be a risk for arterial embolism. Symptoms vary with location, but pain, coolness to an extremity and a absent or diminished pulse are common in the case of an extremity embolism. Treatment is often surgical or involves the use of blood clot dissolving medications (for example streptokinase) delivered selectively to the site of the blockage. (17 Oct 1997) |
| atheroma embolism | Embolism of lipid debris from an ulcerated atheromatous deposit, generally from a large artery to small arterial branches; it is usually small and rarely causes infarction. Synonym: atheroma embolism. (05 Mar 2000) |
| bland embolism | Embolism by simple nonseptic material. (05 Mar 2000) |