Anatomical basis of transgluteal pudendal nerve block (original) (raw)
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A Novel Technique for Pudendal Nerve Block
July 2004, 2004
Pudendal nerve block is performed to confirm the diagnosis of pudendal neuralgia. Many physicians and patients are hesitant to pursue diagnostic nerve blocks to confirm the diagnosis of pudendal neuralgia secondary to significant patient discomfort, the need for special equipment, and the risk in the traditionally described approach. Objective: To describe a novel technique for pudendal nerve block with minimal risk and decreased patient discomfort. Description of the Technique: With the patient in the prone position, the C-arm is projected in the anteroposterior position until the pelvic inlet is visualized. Subsequently, the ischial spine is highlighted by 5 to 15 degree ipsilateral oblique angulation of the fluoroscope. A 25-gauge 3.5 cm needle is advanced to the tip of the ischial spine where the pudendal nerve transiently leaves the pelvis. The pudendal nerve block is performed at this level. Conclusion: We described a new and novel technique to block pudendal nerve under fluoroscopic visualization safely with increased patient comfort.
New, simple, ultrasound-guided infiltration of the pudendal nerve
Diseases of The Colon & Rectum, 2001
PURPOSE: We report the topographic relationship of the pudendal nerve to the accompanying pudendal vessels and the ischial spine and provide the basics for an ultrasonographic depiction of these structures. METHODS: Twenty-nine female and 29 male adult human cadavers were positioned prone to expose the deep gluteal region. In 58 left and 58 right pelves the course of the pudendal nerve and vessels at the ischial spine were evaluated and analyzed statistically (n=116). RESULTS: Multitrunked pudendal nerves were found in 40.5 percent with a left-vs.-right ratio of 1:1.5. The diameters of the single-trunked nerves ranged from 1.3 to 6.8 (mean 3.6±1.1) mm. In 75.9 percent the pudendal nerve was found medial to the accompanying internal pudendal artery. The distance to the artery ranged from 17.2 mm medial to 8 mm lateral (mean, 3.4 mm medial±4.1 mm). The distance to the tip of the ischial spine mm from 13.4 mm medial to 7.4 mm lateral (mean, 2.1 mm medial±3.7 mm). CONCLUSIONS: The knowledge of the close spatial relationship between the pudendal nerve and the internal pudendal artery is important for any infiltration technique and even surgical release. It demands real-time, visually controlled infiltration techniques, such as with ultrasound.
Regional anesthesia and pain medicine, 2016
Ultrasound-guided techniques for pudendal nerve block have been described at the level of the ischial spine and transperineally. Theoretically, however, blockade of the pudendal nerve inside Alcock canal with a small local anesthetic volume would minimize the risk of sacral plexus blockade and would anesthetize all 3 branches of the pudendal nerve before they ramify in the ischioanal fossa. This technical report describes a new ultrasound-guided technique to block the pudendal nerve. The technique indicates an easy and effective roadmap to target the pudendal nerve inside the Alcock canal by following the margin of the hip bone sonographically along the greater sciatic notch, the ischial spine, and the lesser sciatic notch. The technique was applied bilaterally in 3 patients with chronic perineal pain. The technique described was also used to locate the pudendal nerve within Alcock canal and inject dye bilaterally in 2 cadavers. Complete pinprick anesthesia was obtained in the puden...
Magnetic resonance imaging of pudendal nerve: technique and results
Pelviperineology, 2021
INTRODUCTION Since its first description in 1992 and subsequent years, magnetic resonance imaging (MRI) of pudendal nerve has rapidly gained wide acceptance by the medical community as a valuable tool for decision-making and therapy planning in patients with chronic pelvic pain syndromes. The term “MRneurography” has come into practical use to describe the direct depiction of nerves in the body using special modifications of the standard MR imaging technique which allow detection of the signal arising from inside the nerve itself rather than from the surrounding tissues. More specifically, given the intraneural source of the signal, the images obtained during the examination were thought to provide important information about the internal state of the nerve such as the presence of irritation, nerve swelling, compression, pinch or injury. From the technical point of view, the basic principle for a successful examination includes suppression of the signal coming from the bright fat, s...
La Radiologia medica, 2009
The authors sought to evaluate indications, technical feasibility and clinical efficacy of computed tomography (CT)-guided pudendal nerve infiltration in patients with chronic anoperineal pain by reviewing the role of the CT technique in their personal experience and in the recent interventional literature. Twenty-eight women, mean age 50 years, and with a diagnosis of pudendal neuralgia on the basis of clinical and electromyographic criteria were enrolled in the study. CT-guided pudendal nerve injections were performed during three consecutive sessions held 2 weeks apart. In each session, patients received two percutaneous injections: one in the ischial spine, and the other in the pudendal (Alcock's) canal. One patient dropped out of the study after the first session. At clinical assessment, 24h h after treatment, 21/27 patients reported significant pain relief. At follow-up at 3, 6, 9 and 12 months, 24/27 patients reported a>or=20% improvement in the Quality of Life (QOL) i...