Related Experiment Videos
Safety and efficacy of percutaneous injection of polyurethane elastomer (MPU) plugs for vas occlusion in man
Abstract:
This report describes the safety and efficacy of the procedure for percutaneous injection of medical-grade polyurethane elastomer (MPU) to form plugs in the vas deferens. The injection of 0.16-0.22 ml MPU in 53 men resulted in occlusion and azoospermia in 85% of the men after 12 months; 96% achieved azoospermia by 2 years. The success rate of the method and the rate of sperm suppression to azoospermia depended on the shapes of the plugs; this was determined by palpation after insertion. There were few complications and the results are discussed in terms of the reversibility potential of this method.
Insights
This study shows that injecting medical-grade polyurethane elastomer (MPU) into the vas deferens effectively creates plugs, leading to azoospermia in most men within two years. The procedure demonstrated high success rates and minimal complications.
Area of Science:
- Urology
- Reproductive Medicine
- Biomaterials Science
Background:
- Vasectomy is a common sterilization procedure.
- Percutaneous vas deferens occlusion offers a potential alternative.
- Medical-grade polyurethane elastomer (MPU) is a novel biomaterial for plug formation.
Purpose of the Study:
- To evaluate the safety and efficacy of percutaneous MPU injection for vas deferens occlusion.
- To assess the rate of sperm suppression to azoospermia.
- To investigate factors influencing success, including plug shape.
Main Methods:
- Percutaneous injection of 0.16-0.22 ml MPU into the vas deferens in 53 men.
- Assessment of vas deferens occlusion and sperm counts (azoospermia) at 12 and 24 months.
- Evaluation of plug shape via palpation post-insertion.
Main Results:
- 85% of men achieved azoospermia by 12 months post-injection.
- 96% achieved azoospermia by 24 months.
- Success rates and sperm suppression were influenced by plug shape determined by palpation.
Conclusions:
- Percutaneous MPU injection is a safe and effective method for vas deferens occlusion.
- The procedure achieves high rates of azoospermia.
- Plug shape is a critical factor, and reversibility potential warrants further discussion.