Retrospective studies usually less and demand less time as compared to controlled studies. This retrospective study has shown that regional anesthesia techniques are related to a low mortality rate in the first postoperative month and to a low incidence of complications.

Posterior brachial plexus block with the aid of nerve stimulator provides effective anesthesia, is very comfortable for patients and easy to perform.

RESUMO

Hypobaric 0.15% bupivacaine (7.5 mg) associated to fentanyl provided a predominantly unilateral block after twenty minutes in the lateral position. Major advantages of unilateral spinal anesthesia were hemodynamic stability, patient satisfaction and the absence of post-dural puncture headache.

Bilateral pudendal nerves block oriented by nerve stimulator provides excellent analgesia with low need for opioids, without local or systemic complications and without urinary retention. Controlled studies might be able to show whether this should be the first analgesic option for hemorrhoidectomies. Perineal anesthesia lasting 20.21 hours shall induce further studies with stimulator-oriented pudendal block.