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  • Title: The influence of obstructive interval on patency rates following microsurgical epididymovasostomy.
    Author: Schoor RA, Elhanbly SM, Ross LS, Niederberger CS.
    Journal: World J Urol; 2002 Apr; 19(6):453-6. PubMed ID: 12022714.
    Abstract:
    To determine whether or not obstructive interval (OI) negatively affects patency rates in epididymovasostomy (EV) as a sole procedure alone, we reviewed medical records from obstructive azoospermia (OA) patients who underwent unilateral or bilateral epididymovasostomy. For the purpose of analysis, patients were placed into short OI (15 years or less) or long OI (more than 15 years) categories. Patency rate for the short OI group was 58%, compared to 15% for the long OI group (P<0.01). In conclusion, we observed that patency rates worsened with obstructive interval greater than 15 years. Epididymovasostomy is a challenging procedure that may not be successful, and, thus, patients should be counseled that obstructive interval might affect surgical outcomes. We routinely perform testicular sperm extraction (TESE) with sperm cryopreservation in this patient population due to the high likelihood that it will ultimately be required for assisted reproductive technology (ART).
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