anastomosis , pl. anastomoses (a-nas´to-mo´sis, -sez)

1. A natural communication, direct or indirect, between two blood vessels or other tubular structures. Also incorrectly applied to nerves. See communication. 2. An operative union of two hollow or tubular structures. 3. An opening created by surgery, trauma, or disease between two or more normally separate spaces or organs. [G. anastomosis, from anastomoo, to furnish with a mouth]
arteriolovenular a. arteriovenous a
a. arterioveno´sa [NA] arteriovenous a
arteriovenous a. (A-V a.) vessels through which blood is shunted from arterioles to venules without passing through the capillaries.a. arteriovenosa [NA] , arteriolovenular a;
A-V a. abbreviation for arteriovenous a.
Béclard's a. an a. between the right and the left end-branch of the deep lingual artery.arcus raninus;
bevelled a. a. performed after cutting each of the structures to be joined in an oblique fashion.
Billroth I a. Billroth's operation I
Billroth II a. Billroth's operation II
Braun's a. after gastroenterostomy, a. between afferent and efferent loops of jejunum.
cavopulmonary a. a means of palliating cyanotic heart disease by anastomosing the right pulmonary artery to the superior vena cava.cavopulmonary shunt, Glenn shunt;
circular a. a. performed after cutting each structure to be joined in a plane vertical to the ultimate flow through the structures.
Clado's a. a. in the right suspensory ligament of the ovary between the appendicular and ovarian arteries.
conjoined a. the joining together of two small blood vessels by side-to-side elliptical a. to create a single larger stoma for subsequent end-to-end a.
cruciate a. , crucial a. a four-way a. between branches of the first perforating branch of the deep femoral, inferior gluteal and medial and lateral circumflex femoral arteries, located posterior to the upper part of the femur. Formerly described as commonly occurring; investigations show it rarely occurs in the four-way "cross" pattern.
Damus-Stancel-Kaye a. Damus-Kaye-Stancel procedure
elliptical a. a modification of direct a. whereby one or both tubular structures are spatulated beforehand, thus creating an ellipse of greater cross-sectional as well as circumferential dimension than would be possible with a bevelled or circular a.
Galen's a. communicating branch of superior laryngeal nerve with recurrent laryngeal nerve
Hofmeister-Pólya a. See Hofmeister's operation, Pólya's operation.
Hoyer's anastomoses Sucquet-Hoyer canals, under canal
Hyrtl's a. Hyrtl's loop
intermesenteric arterial a. intestinal arterial arcades, under arcade
intestinal a. enteroenterostomy
isoperistaltic a. an a. allowing flow of contents in the same and normal direction.
Jacobson's a. a portion of the tympanic plexus.
Martin-Gruber a. a nerve anomaly in the forearm, consisting of a median to ulnar nerve communication; Also referred to a median-to-ulnar crossover.
microvascular a. a. of very small blood vessels performed under a surgical microscope.
portacaval anastomoses portal-systemic anastomoses
portal-systemic anastomoses 1. naturally-occurring venous communications between tributaries of the portal venous system and tributaries of the systemic venous system. The major portal-systemic anastomoses include: 1) esophageal branches of left gastric vein with esophageal veins, 2) superior rectal vein with middle and inferior rectal veins, 3) paraumbilical veins with subcutaneous veins of anterior abdominal wall, 4) retroperitoneal veins with venous branches of veins of the colon and bare area of the liver, and 5) a patent ductus venosus connecting left branch of portal vein to inferior vena cava (rare). These anastomoses are important clinically, providing collateral circulation during portal obstruction or hypertension, at which time they may become varicose; See caput medusae, esophageal varices, under varix, hemorrhoids. 2. surgically-created communications between the portal vein and the inferior vena cava or their tributaries, to relieve portal hypertension.portacaval anastomoses;
postcostal a. longitudinal a. of intersegmental arteries giving rise to the vertebral artery.
Potts' a. Potts' operation
precapillary a. an a. between arterioles just before they become capillaries.
precostal a. (pre-kos-tal) longitudinal a. of intersegmental arteries in the embryo that gives rise to the thyrocervical and costocervical trunk.
Riolan's a. the specific portion of the marginal artery of the colon connecting the middle and left colic arteries.Riolan's arc (3);
Roux-en-Y a. a. of the distal end of the divided jejunum to the stomach, bile duct, or another structure, with implantation of the proximal end into the side of the jejunum at a suitable distance below the first a., the bowel then forming a Y-shaped pattern.
Schmidel's anastomoses abnormal channels of communication between the caval and portal venous systems.
Sucquet-Hoyer anastomoses Sucquet-Hoyer canals, under canal
Sucquet's anastomoses Sucquet-Hoyer canals, under canal
termino-terminal a. an operation by which the central end of an artery is connected with the peripheral end of the corresponding vein, and the peripheral end of the artery with the central end of the vein.
transureteroureteral a. transureteroureterostomy
uretero-ileal a. a. between the ureter and an isolated segment of ileum. See also Bricker operation.
ureterosigmoid a. a. between the ureter and a segment of the sigmoid colon.
ureterotubal a. procedure for a. between the ureter and the fallopian tube.
ureteroureteral a. a. from one part of a ureter to another part of the same ureter.


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