释义 |
vasectomy
va·sec·to·my V0035000 (və-sĕk′tə-mē, vā-zĕk′-)n. pl. va·sec·to·mies Surgical removal of all or part of the vas deferens, usually as a means of sterilization.vasectomy (vəˈsɛktəmɪ) n, pl -mies (Surgery) surgical removal of all or part of the vas deferens, esp as a method of contraceptionva•sec•to•my (væˈsɛk tə mi, veɪˈzɛk-) n., pl. -mies. surgical excision of part or all of the vas deferens to effect sterility in men. [1895–1900; vas (deferens) + -ectomy] va•sec′to•mize`, v.t. -mized, -miz•ing. vasectomysurgical excision of part of the vas deferens, the duct which carries sperm from the testes, performed as a form of male contraception.See also: Surgery surgical excision of part of the vas deferens, the duet which carries sperm from the testes, performed as a form of male contraception.See also: BirthvasectomySurgery to sever the vas deferens in order to cause sterility.ThesaurusNoun | 1. | vasectomy - surgical procedure that removes all or part of the vas deferens (usually as a means of sterilization); is sometimes reversibleablation, cutting out, extirpation, excision - surgical removal of a body part or tissuesurgical contraception - contraception by surgical sterilization | Translationsvasectomy
vasectomy, male sterilization by surgical excision of the vas deferens, the thin duct that carries sperm cells from the testicles to the prostate and the penis. Vasectomy is a popular method of birth controlbirth control, practice of contraception for the purpose of limiting reproduction. Methods of Birth Control
Male birth control methods include withdrawal of the male before ejaculation (the oldest contraceptive technique) and use of the condom, a rubber sheath ..... Click the link for more information. : in 1983, figures showed that approximately 10 million men had been sterilized in the U.S. since 1969. Excision of the vas deferens is a minor surgical procedure that can be performed in a physician's office in less than half an hour. A small incision is made on one side of the scrotum (the external sac housing the testes) and the vas deferens is located, cut, and the ends tied off. The incision is closed and the procedure is repeated on the other side. After surgery, it is necessary to wait until a negative sperm count is obtained before discarding other means of contraception, because viable sperm cells are retained in the seminal vesicles (the pair of storage pouches where sperm is mixed with other components of semen) and along the various sperm ducts. In addition it is usually advised that the patient be reexamined after a year, because the severed ends of the vas deferens occasionally reknit. Sterility resulting from vasectomy is considered to be permanent, and attempts at surgically reversing vasectomy, called vasovasotomy, have had limited success. In India, where the government is trying to stem the tide of overpopulation, money is paid to men who submit to voluntary vasectomy. Efforts to overcome the irreversibility of vasectomy have also led to experimentation with the implantation of faucetlike devices that can be made to open or close the sperm duct in a simple operation. Such devices have functioned successfully in animals but are still considered experimental in humans because of their unproved reversibility, high cost, and the degree of surgical skill needed to implant them. Another option suggested to those undergoing vasectomy is to preserve their fertility by depositing semen in sperm banks. Such semen samples are frozen in liquid nitrogen below −300°F; (−185°F;) and are considered to be viable for an indefinite period. However, there is considerable debate over the scientific and ethical aspects of sperm freezing, and the practice is still considered experimental. Researchers have examined the possible negative physiological effects of vasectomy, but there is no conclusive evidence that any link exists between the procedure and disease. Bibliography See S. D. Mumford, Vasectomy: The Decision-Making Process (1978); G. Denniston, Understanding Vasectomy (1978). vasectomy[va′sek·tə·mē] (medicine) Cutting, or removing a section from, the ductus deferens. vasectomy surgical removal of all or part of the vas deferens, esp as a method of contraception vasectomy
Vasectomy DefinitionA vasectomy is a surgical procedure performed on males in which the vas deferens (tubes that carry sperm from the testicles to the seminal vesicles) are cut, tied, cauterized (burned or seared) or otherwise interrupted. The semen no longer contains sperm after the tubes are cut, so conception cannot occur. The testicles continue to produce sperm, but they die and are absorbed by the body.PurposeThe purpose of this operation is to provide reliable contraception. Research indicates that the level of effectiveness is 99.6%. Vasectomy is the most reliable method of contraception.DescriptionVasectomies are often performed in the doctor's office using a local anesthesia. The patient's scrotum area will be shaved and cleaned with an antiseptic solution to reduce the chance of infection. A small incision is made into the scrotum (the sac containing the testicles that produce the sperm). Each of the vas deferens (one from each testicle) is tied in two places with nonabsorbable (permanent) sutures and the tube is severed between the ties. The ends may be cauterized (burned or seared) to decrease the chance that they will leak or grow back together.Sterility does not occur immediately after the procedure is finished. Men must use other methods of contraception until two consecutive semen analyses confirm that there are no sperm present in the semen. This will take four to six weeks or 15-20 ejaculations to clear all of the sperm from the tubes."No scalpel" vasectomies are gaining popularity. Instead of an incision, a small puncture is made into the scrotum. The vas deferens are cut and sealed in a manner similar to that described above. No stitches are necessary and the patient has less pain. Other advantages include less damage to the tissues, less bleeding, less risk of infection, and less discomfort after the procedure.In some, cases vasectomies may be reversed. However, this procedure should be considered permanent as there is no guarantee of successful reversal.PreparationNo special physical preparation is required. The physician will first assess the patient's general health in order to identify any potential problems that could occur. The doctor will then explain possible risks and side effects. The patient is asked to sign a consent form which indicates that he understands the information he has received, and gives the doctor permission to perform the operation.AftercareFollowing the surgery, ice packs are often applied to scrotum to decrease pain and swelling. A dressing (or athletic supporter) which supports the scrotum can also reduce pain. Mild over-the-counter pain medication such as aspirin or acetaminophen (Tylenol) should be able to control any discomfort. Activities may be Vasectomy is a surgical procedure performed on males in which the vas deferens (tubes that conduct sperm from the testicles to the penis) are cut, tied, cauterized, or otherwise interrupted. Although the testicles still produce sperm, the sperm die and are absorbed by the body. Men who have had vasectomies may continue to ejaculate the same amount of semen as before the procedure. (Illustration by Electronic Illustrators Group.)restricted for one or two days, and sexual intercourse for three to four days.RisksThere are very few risks associated with vasectomy other than infection, bruising, epididymitis (inflammation of the tube that carries the sperm from the testicle to the penis), and sperm granulomas (collection of fluid that leaks from a poorly sealed or tied vas deferens). These are easily treated if they do occur. Patients do not experience difficulty achieving an erection, maintaining an erection, or ejaculating. There is no decrease in the production of the male hormone (testosterone), and sex drive and ability are not altered. Vasectomy is safer and less expensive than tubal ligation (sterilization of a female by cutting the fallopian tube to prevent conception).Normal resultsNormally, vasectomies are 99% successful in preventing conception. As such, it is one of the most effective methods available to consumers.ResourcesOrganizationsPlanned Parenthood Federation of America, Inc.. 810 Seventh Ave., New York, NY 10019. (800) 669-0156. http://www.plannedparenthood.org.Key termsEjaculation — The act of expelling the sperm through the penis during orgasm.Epididymitis — Inflammation of the small tube that rests on top of the testicle and is part of the system that carries sperm from the testicle to the penis. The condition can be successfully treated with antibiotics if necessary.Scrotum — The sac which contains the testicles.Sperm granuloma — A collection of fluid that leaks from an improperly sealed or tied vas deferens. They usually disappear on their own, but can be drained if necessary.Testicles — The two egg-shaped organs found in the scrotum that produce sperm.Tubal ligation — A surgical procedure in which the fallopian tubes are tied in two places and cut between. This prevents eggs from moving from the ovary to the uterus.vasectomy [vah-sek´tah-me] excision of the vas (ductus) deferens, or a portion of it; bilateral vasectomy results in sterility.Vasectomy surgery. A, Incision exposes sheath, which is then opened. Vas is exposed (B) and occluded with two clips (C). D, Segment of about half an inch is excised. E, Vas is replaced in sheath and skin is sutured.va·sec·to·my (va-sek'tŏ-mē), Excision of a segment of the vas deferens, performed in association with prostatectomy or to produce sterility. Synonym(s): deferentectomy [vas- + G. ektomē, excision] vasectomy (və-sĕk′tə-mē, vā-zĕk′-)n. pl. vasecto·mies Surgical removal of all or part of the vas deferens, usually as a means of sterilization.vasectomy Male sterilisation in which a segment of the vas deferens arising from each testis is excised.vasectomy Urology The surgical induction of infertility, denying sperm egress from the testes, by ligating or disrupting both vasa deferentia, a form of permanent contraception chosen by up to 500,000 US ♂/yr; 10-20 ejaculates are required post-procedure before the vasectomized are 'shooting blanks' and have no sperm; the vasectomized may experience long-term scrotal pain, possibly related to sperm granuloma formation;2⁄3 develop circulating antisperm antibodies. See In vitro fertilization, Post-vasectomy sperm count, Vasectomy reversal. va·sec·to·my (vas-ek'tŏ-mē) Excision of a segment of the vas deferens, performed in association with prostatectomy, or to produce sterility. Synonym(s): deferentectomy, gonangiectomy. [vas- + G. ektomē, excision]vasectomy (văs-ĕk′tō-mē) [L. vas, vessel, + Gr. ektome, excision] VASECTOMY AND ITS REVERSALVASECTOMY AND ITS REVERSALVASECTOMY AND ITS REVERSALVASECTOMY AND ITS REVERSALRemoval of all or a segment of the vas deferens. Bilateral vasectomy is the most successful method of male contraception. The procedure prevents sperm (which are manufactured in the testicles) from being expelled in the male ejaculate. It is usually carried out as an outpatient or same day procedure under local or light intravenous anesthesia. See: illustrationNotePersons who have had this surgical procedure ejaculate in a normal manner but the ejaculate contains semen, produced independently in the seminal vesicles, without sperm. Patient carePostoperatively, the patient applies cold packs to the surgical site, to limit swelling, pain, and inflammation. Activities are limited, and sexual interest is avoided for the first week, approximately. An athletic supporter or tightly fitting underwear are worn to support the scrotum and limit pain. The procedure is considered successful when two consecutive sperm samples are shown to be free of sperm, typically 8 to 12 weeks postoperatively. Men choose vasectomy only when they want to become permanently sterile. Nonetheless, the procedure can be reversed, although vasectomy reversal is a more complicated operation than the initial severing of the tubes. CAUTION!Patients should be advised that vasectomy does not prevent sexually transmitted diseases.vasectomy The common operation for male sterilization. The VAS DEFERENS is exposed on each side through a short incision, just below the root of the penis, and is cut through and the ends tied off and secured well apart. Following this no newly produced spermatozoa can reach the exterior. The operation can be reversed but fertility is not always restored.vasectomy a minor surgical operation, involving the cutting and separation of the cut ends of the VAS DEFERENS so that they cannot rejoin. Effectively, the operation prevents the sperm from mingling with the secretions of the accessory glands and thus acts as a means of BIRTH CONTROL. The resulting semen, therefore, lacks sperm, and although a normal ejaculation can be produced, there is no risk of fertilization. Sperm is reabsorbed in the vas deferens and there is usually no effect on sexual behaviour.vasectomy Related to vasectomy: vasectomy reversalWords related to vasectomynoun surgical procedure that removes all or part of the vas deferens (usually as a means of sterilization)Related Words- ablation
- cutting out
- extirpation
- excision
- surgical contraception
|