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Vasography
Vasography is an X-ray study of the vas deferens to see if there is blockage, oftentimes in the context of male infertility. An incision is made in the scrotum, contrast is injected in the vas deferens, and X-rays are taken from different angles.〔 Thus, it is an invasive procedure and carries risk of iatrogenic scarring and obstruction of the vas. Vasography has traditionally been considered the gold standard imaging modality for evaluating the seminal tract patency.
To avoid performing an extra operation, vasography is encouraged to be done at the time of correction of the obstruction, and thus should not be done as an isolated outpatient procedure.〔
==History==
Vasography was first described by Belfield in 1913 where a vasotomy initially done and the vas deferens was subsequently intubated. After almost 40 years of being overlooked, Boreau revived the procedure in the 1950s.〔 Then, vasography was somewhat overused for various fertility disorders and other diseases such as tuberculosis, prostate cancer, hemospermia, and compressive fibrolipomatosis, without considering the possible risks and complications from the procedure.〔 Today, vasography is used to determine the location of obstruction in azoospermic patients who have demonstrated spermatogenesis by testis biopsy.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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