| PASVR | pulmonary anomalous superior venous return |
|---|---|
| Pv | Proteus vulgaris; venous pressure |
| PVA | Paralyzed Veterans of America; peripheral venous alimentation; polyvinyl acetate; polyvinyl alcohol;... |
| PVCO2 | partial pressure of carbon dioxide in mixed venous blood |
| PVF | peripheral visual field; portal venous flow; primary ventricular fibrillation |
| posterior auricular plexus | An autonomic plexus on the artery of this name, derived from the external carotid plexus. Synonym: plexus auricularis posterior. (05 Mar 2000) |
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| posterior cord of brachial plexus | In the brachial plexus, the bundle of nerve fibres formed by the posterior divisions of the upper, middle and lower trunks which lies posterior to the axillary artery; it gives rise to the upper and lower subscapular and thoracodorsal nerves, terminates by dividing into the axillary, and radial nerves. Synonym: fasciculus posterior plexus brachialis. (05 Mar 2000) |
| posterior coronary plexus | The portion of the cardiac plexus that accompanies branches of the coronary arteries on the posteroinferior surface of the heart. (05 Mar 2000) |
| Cruveilhier's plexus | A nerve plexus formed by communications between the dorsal primary rami of the first three cervical nerves; it lies deep to the semispinalis capitis muscle. (05 Mar 2000) |
| haemorrhoidal plexus | A venous plexus resting upon the posterior and lateral walls of the rectum; it drains into the superior rectal vein to the portal, the middle rectal to the internal iliac and the inferior rectal to the internal pudendal. Synonym: plexus venosus rectalis, haemorrhoidal plexus. (05 Mar 2000) |
| Haller's plexus | A nervous plexus of sympathetic filaments and branches of the external laryngeal nerve on the surface of the inferior constrictor muscle of the pharynx. (05 Mar 2000) |
| sacral plexus | Formed by the fourth and fifth lumbar (lumbosacral trunk) and first, second, and third sacral nerves; it lies on the inner surface of the posterior wall of the pelvis usually embedded in the piriformis muscle; its nerves supply the lower limbs, its major product being the sciatic nerve. Synonym: plexus sacralis, ischiadic plexus, sciatic plexus. (05 Mar 2000) |
| Heller's plexus | Plexus of small arteries in the wall of the intestine. (05 Mar 2000) |
| Santorini's plexus | Venous plexus on ventral and lateral prostatic surfaces. (05 Mar 2000) |
| Sappey's plexus | A network of lymphatics in the areola of the nipple. (05 Mar 2000) |
| hepatic plexus | An unpaired autonomic plexus lying on the hepatc artery and its branches in the liver. Synonym: plexus hepaticus. (05 Mar 2000) |
| prostaticovesical plexus | A venous plexus which includes the prostatic venous plexus around the prostate gland and that of the neck of the bladder; it communicates with the vesical and pudendal plexus's, receives the deep dorsal vein of the penis, and empties. By one or more efferent vessels into the internal iliac (hypogastric) vein; it corresponds to the inferior vesical plexus in the female. Synonym: plexus prostaticovesicalis. (05 Mar 2000) |
| sciatic plexus | Formed by the fourth and fifth lumbar (lumbosacral trunk) and first, second, and third sacral nerves; it lies on the inner surface of the posterior wall of the pelvis usually embedded in the piriformis muscle; its nerves supply the lower limbs, its major product being the sciatic nerve. Synonym: plexus sacralis, ischiadic plexus, sciatic plexus. (05 Mar 2000) |
| pterygoid plexus | A venous plexus occupying the infratemporal fossa receiving veins accompanying the branches of the maxillary artery, and terminating posteriorly in the maxillary vein; anteriorly the pterygoid plexus drains via the deep facial vein into the facial vein. Synonym: plexus pterygoideus. (05 Mar 2000) |
| pulmonary plexus | One of two autonomic plexus's, anterior and posterior, at the hilus of each lung, formed by cardiopulmonary splanchnic nerves of the sympathetic trunk and bronchial branches of the vagus nerve; from them various branches accompany the bronchi and arteries into the lung. Synonym: plexus pulmonalis. (05 Mar 2000) |