Microscopic epididymal sperm aspiration (MESA) is a technique for the procurement of sperm from the epididymis of men. It is used for men in whom the sperm drainage system is absent or not amenable to reconstruction. This problem is seen often in men with vasal agenesis, a congenital condition in which the vas deferens or drainage system does not form. It may also be acquired in men who have had a vasectomy or with a secondary blockage that occurs following inflammation or infection.
A MESA procedure is performed through an operating microscope. Sperm are identified within the epididymis from an isolated tubule and directly aspirated until a sufficient number of sperm are collected. Once the sperm have been processed, they may be used for in vitro fertilization (IVF) with ICSI (intracytoplasmic sperm injection) or cryopreserved for future use.
Microscopic Epididymal Sperm Aspiration Resources
- MESA Procedural Steps with Video:
- Sperm Retrieval and Diagnosis Techniques from the Urology Care Foundation