MICRODISSECTION TESTICULAR SPERM EXTRACTION (MICRO-TESE) AS A SPERM ACQUISITION METHOD FOR MEN WITH NONOBSTRUCTIVE AZOOSPERMIA SEEKING FERTILITY: OPERATIVE AND LABORATORY ASPECTS

Introduction Rare foci of sperm production may be found in up to 60% of men with nonobstructive azoospermia (NOA).Sperm production, if present, is minimal for sperm appearance in the ejaculate.Given that Belts there are no treatment options to restore fertility, sperm retrieval is the only alternative to find testicular sperm than then can be used

Aiming at the problems of untimely manual flow path switching under abnormal working conditions and long time required for pressure regulation through the PID control of the regulating valves of A-Du-Wu-Shan system, risk analysis was carried out for the two operation modes after transformation, appropriate risk prevention measures were developed, a