The vas deferens is isolated by three-finger technique on both sides. The ideal entry point for the needle is midway between the top of the testes and the base of the penis. Usually, 100 mg lidocaine (without epinephrine) is injected to create a wheal. The no scalpel vasectomy uses two specific instruments designed by Dr. Li Shunqiang. One is a ringed clamp and the other is a dissecting forcep. The ringed clamp is used to isolate and encircle the vas. The dissecting forcep is used to puncture the scrotal skin, spread tissues, and pierce the vas deferens to deliver it outside the scrotum. The vas deferens is then occluded. The most commonly used methods to occlude the vas deferens include:   The American Urological Association recommends occlusion by one of the following methods to achieve highest efficacy:   No scalpel vasectomy has less pain, bleeding and infection than conventional vasectomy. No scalpel vasectomy can also be done in less time and the individual is able to return to sexual activity sooner than traditional vasectomy surgery. Complications are rare and can include: