/va sek"teuh mee/, n., pl. vasectomies. Surg.excision of the vas deferens, or of a portion of it: performed to effect sterility in men.[1895-1900; VAS (DEFERENS) + -ECTOMY]
* * *Severing of the vas deferens, which carries sperm from the testes to the prostate gland, to cause sterility or prevent infection.This relatively simple procedure, which can be performed in a doctor's office with local anesthetics, removes the ability to father children without affecting ability to achieve erection or orgasm. The vas is cut near its beginning, in the scrotum. The cut ends may be sealed off or left open. Reversal is more likely to succeed in the latter case; microsurgery has improved the success rate.
* * *▪ surgerysevering of the vas deferens (ductus deferens) in the male reproductive tract to bring about sterility or to prevent infection. The testes (testis) in the male produce the sperm cells that fertilize the ovum, or egg, in the process of producing a new organism. Connected to each testis is the epididymis, a structure that serves as a storage sac for sperm. The duct that passes sperm from the testes to the prostate and other reproductive organs is the vas deferens (see ductus deferens). The testes, the epididymis, and the beginning of the vas deferens are enclosed in the scrotal sac.Vasectomy is a relatively simple procedure that can be performed in the physician's office. The scrotum is locally anesthetized, and the vas deferens is isolated by external examination. A small incision is made over the cord, it is clamped in two spots, and severed between the clamps. The two free ends of the vas deferens are then usually cauterized to coagulate the blood and seal off the tubes. The clamps are removed and the small incision is closed with a single stitch.Vasectomies are usually performed for the purpose of contraception. However, vasectomy may be performed as a prophylactic to prevent further infections from occurring in the epididymes or testes; it is considered much less injurious to the body to produce sterility than to take the risk of losing the functioning testes altogether. After the vas deferens has been severed, the testes still produce hormones that allow the male to perform in a normal sexual manner and the hormones that support the secondary sex characteristics such as pubic hair, facial hair, and deep voice. The male still emits small quantities of sperm for up to six weeks after the operation. Once the residual supply in the remaining reproductive tract has been depleted or washed out, he is sterile.Some men who have had a vasectomy later decide they would like to have children and therefore choose to undergo vasectomy reversal. This may be achieved using standard surgical techniques or using microsurgical techniques, in which a microscope and special surgical instruments are used to aid the reconnection of the vas deferens. Surgical attempts to reconnect the cords have a success rate of at least 40 percent, with microsurgery offering the highest chance for success. If surgical reconstruction cannot be performed or is unsuccessful, sperm can be harvested and used for in vitro fertilization.
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Vasectomy — Diagram showing the usual location of a vasectomy. Background Birth control type Sterilization First use 1899 (experiments fro … Wikipedia
Vasectomy — Vas*ec to*my (v[a^]s*[e^]k t[ o]*m[y^]), n. [Vas + ecmoty.] (Surg.) Resection or excision of the vas deferens. [Webster 1913 Suppl.] … The Collaborative International Dictionary of English
vasectomy — 1897, from Mod.L. vas (deferens) + ECTOMY (Cf. ectomy) a cutting … Etymology dictionary
vasectomy — ► NOUN (pl. vasectomies) ▪ the surgical cutting and sealing of part of each vas deferens, especially as a means of sterilization … English terms dictionary
vasectomy — [va sek′tə mē] n. pl. vasectomies [ VAS(O) + ECTOMY] the surgical removal or tying of the vas deferens to prevent the passing of sperm: used as a form of birth control vasectomize vt. vasectomized, vasectomizing … English World dictionary
vasectomy — Excision of a segment of the vas deferens, performed in association with prostatectomy, or to produce sterility. [vas + G. ektome, excision] * * * va·sec·to·my tə mē n, pl mies surgical division or resection of all or part of … Medical dictionary
vasectomy — n. the surgical operation of severing the duct (vas deferens) connecting the testis to the seminal vesicle and urethra. Vasectomy of both ducts causes sterility and is an increasingly popular means of birth control. Vasectomy does not affect… … The new mediacal dictionary
vasectomy — UK [vəˈsektəmɪ] / US noun [countable] Word forms vasectomy : singular vasectomy plural vasectomies medical a medical operation that makes a man unable to have children. Doctors cut the tube that the man s sperm passes through … English dictionary
vasectomy — [[t]vəse̱ktəmi[/t]] vasectomies N VAR A vasectomy is a surgical operation in which the tube that carries sperm to a man s penis is cut, usually as a means of contraception … English dictionary
vasectomy — noun (plural mies) Etymology: International Scientific Vocabulary Date: 1899 surgical division or resection of all or part of the vas deferens usually to induce sterility … New Collegiate Dictionary