[The natural history of sperm cleareance after vasectomy]. / La historia natural del aclaramiento de espermatozoides en el semen tras la vasectomía.
Actas Urol Esp
; 28(4): 286-9, 2004 Apr.
Article
em Es
| MEDLINE
| ID: mdl-15248399
ABSTRACT
OBJECTIVE:
To study the time required to obtain a negative sperm analysis after vasectomy. MATERIAL ANDMETHODS:
We reviewed 239 consecutive vasectomies performed between september 1998 and september 1999. All of them were done in an ambulatory basis. Follow up interval was 41-853 days (mean 144, median 104). The first semen analysis was requested between 1 and 6 months after the surgical procedure. If the sample still showed spermatozoa, then a new one was requested every two months. Probability of becoming azoospermic was studied with Kaplan-Meier curves.RESULTS:
Persistent spermatozoa could be found in 31 patients (13%) at the end of follow-up. Despite having a positive semen analysis, 10 patients (4.2%) discontinued medical visits. Time required to obtain a negative sperm count ranged from 58 to 362 days (mean 133, median 99). The probability of being azoospermic 200 and 260 days after vasectomy was 80-90% respectively. A total of 328 semen analysis were requested (range 1-4, mean 1.37, median 1)CONCLUSIONS:
A minimum of 200 days (6.6 months) are needed to clear all the spermatozoa in semen after vasectomy in 80% of our patients. Requesting the first semen sample 7 months after vasectomy is cost-effective, reducing unnecesary medical visits and increasing the rentability of this test.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Espermatozoides
/
Vasectomia
Tipo de estudo:
Observational_studies
Limite:
Humans
/
Male
Idioma:
Es
Ano de publicação:
2004
Tipo de documento:
Article