TESA – testicular sperm aspiration
- The technique called Testicular Sperm Extraction, or TESE, is used in cases of non-obstructive azoospermia.
- This technique involves the collection of sperm directly from the testis.
- The patient may require an additional injection to achieve a mild degree of sedation.
- A special needle, which allows the recovery of several samples of testicular tissue from different locations, is used.
- A sample from the testicular biopsy will be sent for examination in order to obtain a tissue diagnosis and also to rule out the risk of Testicular Cancer.
After the Procedure?
Patients are generally informed on the same day whether sperm has been found. However, in the most difficult cases, a two to three day period of tissue incubation is necessary. Recovered sperm will be frozen for later use. There are generally enough sperm to perform several IVF / ICSI cycles. The chance of recovering sperm is almost 100% in case of simple blockage. With abnormalities of the testes, the average recovery rate can drop to 50% - 60%. It is crucial to understand that there is no guarantee of finding sperm even when the pre-operative tests seem positive.