[Somatic nerve block in the management of chronic pelvic and perineal pain]

A Comprehensive Review of Cluneal Neuralgia as a Cause of Lower Back Pain

Lower back pain (LBP) is one of the most common presenting complaints in clinical adult medical patients. While most often diagnosed as "nonspecific mechanical" in etiology, several lesser known, rarer causes of LBP exist, some of which can even cause neuropathic pain. One of these infrequent causes, cluneal neuralgia (CN), is associated most often with damage or entrapment of the cluneal nerves, particularly the superior cluneal nerve (SCN) and/or the middle cluneal nerve (MCN). These nerves supply sensation to the posterior lumbar and buttock area. However, the LBP caused by CN is often difficult to recognize because it can mimic radiculopathy or sacroiliac joint (SIJ) pain or lead to symptoms in the legs. This makes CN significantly important for clinicians and surgeons to include in their differential. A thorough history proves beneficial in the diagnostic workup, as many risk factors for CN have been reported in the literature. If a CN diagnosis is made, several effective conservative measures can alleviate patients' pain, such as nerve blocks, peripheral nerve stimulation, or high frequency thermal coagulation. Additionally, surgical treatments, such as CN release or endoscopic decompression, have resulted in fantastic patient outcomes. The purpose of the present investigation is to investigate the existing literature about CN as a cause for LBP, consider its epidemiology, discuss its pathophysiology and risk factors, elucidate its clinical presentation and diagnosis, and examine the various treatment modalities that have been reported across the world.

Therapy With Local Anesthetics to Treat Vulvodynia. A Pilot Study

Introduction

Vulvodynia (chronic vulvar pain) is a sexually debilitating disorder with a prevalence of ∼10%.

Aim

To investigate the effectiveness of therapy with local anesthetics (TLA) in women with severe vulvodynia, we conducted a prospective, non-controlled observational study.

Methods

45 patients with severe chronic vulvodynia (primary and secondary vulvodynia, 0–10 numeric analogue scale (NAS) ≥6, median 7.9, duration ≥6 months, median 65.2 months) in an outpatient practice in Germany were treated with TLA in 3–12 sessions using procaine 1% as local anesthetic. Effectiveness was analyzed with Wilcoxon signed rank tests and Wilcoxon rank sum tests.

Outcomes

Therapeutic success as a reduction of pain to ≤4 NAS lasting for ≥6 months after end of therapy.

Results

TLA successfully reduced vulvodynia in 36 of 45 patients (80 %, responders). The NAS reduction was from 7.9 to 2.4 (P < .001). Even patients denominated as non-responders experienced a significant reduction in NAS (P = .03). In responders, long-term success was observed for 6.8–125 months (median 24.1 months). No adverse events occurred.

Clinical Translation

A promising new treatment for a hard-to-treat chronic female pain disorder.

Strengths and Limitations

Limitation: Monocentric, non-controlled observational design; Strength: the high number of patients treated.

Conclusion

The high success rate of TLA in this investigation offers new perspectives on the etiology of vulvodynia as a complex pain syndrome affecting several nerves of the pelvic floor, and also provides early insight into the effectiveness of TLA in women with vulvodynia.

Weinschenk S, Benrath J, Kessler E, et al. Therapy With Local Anesthetics to Treat Vulvodynia. A Pilot Study. Sex Med 2022;10:100482.

[Pelvic and perineal pain after genital prolapse: A literature review]

INTRODUCTION

Pelvic and perineal pain after genital prolapse surgery is a serious and frequent post-operative complication which diagnosis and therapeutic management can be complex.

MATERIALS ET METHODS

A literature review was carried out on the Pubmed database using the following words and MeSH : genital prolapse, pain, dyspareunia, genital prolapse and pain, genital prolapse and dyspareunia, genital prolapse and surgery, pain and surgery.

RESULTS

Among the 133 articles found, 74 were selected. Post-operative chronic pelvic pain persisting more than 3 months after surgery according to the International Association for the Study of Pain. It can be nociceptive, neuropathic or dysfunctional. Its diagnosis is mainly clinical. Its incidence is estimated between 1% and 50% and the risk factors are young age, the presence of comorbidities, history of prolapse surgery, severe prolapse, preoperative pain, invasive surgical approach, simultaneous placement of several meshes, less operator experience, increased operative time and early post-operative pain. The vaginal approach can cause a change in compliance and vaginal length as well as injury to the pudendal, sciatic and obturator nerves and in some cases lead to myofascial pelvic pain syndrome, whereas the laparoscopic approach can lead to parietal nerve damage. Therapeutic management is multidisciplinary and complex.

CONCLUSION

Pelvic pain after genital prolapse surgery is still obscure to this day.

A directional preference approach for chronic pelvic pain, bladder dysfunction and concurrent musculoskeletal symptoms: a case series

BACKGROUND

Chronic pelvic pain (CPP) with concurrent musculoskeletal and bladder symptoms is a complex and challenging problem. However, clinically the co-existence of these symptoms is not routinely questioned, and their musculoskeletal source is not investigated thoroughly. The purpose of this case series is to present the use of Mechanical Diagnosis and Therapy (MDT) principles in seven patients with concurrent chronic pelvic pain, bladder dysfunction and musculoskeletal symptoms.

CASE DESCRIPTIONS

Seven patients with coexisting pelvic health and musculoskeletal signs and symptoms were retrospectively reviewed. Most common symptoms were urinary frequency, incontinence, pelvic pain, nocturia, dyspareunia, bladder dyssynergia, and lumbar, pelvic or hip pain. All patients failed to recognize the possible interconnectedness of the two sets of symptoms. Each exhibited a directional preference (DP) and subsequent MDT provisional classification of derangement was established; the use of DP forces abolished or dramatically improved both symptoms and mobility impairments. In all cases DP was for sustained sagittal forces initially, but ultimately lateral forces and mobilization were indicated.

OUTCOMES

Changes in Pelvic Floor Impact Questionnaire, Care Connections Pelvic Floor and Lumbar spine were all clinically significant and exceeded minimally Clinical Important Differences several times. Average of 5.8 sessions per patient was noted. Follow-up at an average of 3.3 years revealed ongoing satisfaction and confidence in independent self-management.

DISCUSSION

These case studies highlight the importance of ensuring expansion of intake questions for possible co-existence of symptoms in both pelvic and musculoskeletal patients, possibly suggesting a mechanical intervention is indicated. Provisional subclassification into 'Mechanical Pelvic Syndrome' is proposed. Level of Evidence: 4.

New perineal injection technique for pudendal nerve infiltration in diagnostic and therapeutic procedures

PURPOSE

Pudendal nerve injection is used as a diagnostic procedure in the vulvar region and for therapeutic purposes, such as in vulvodynia. Here, we provide a new, easy-to-perform perineal injection technique.

PATIENTS AND METHODS

We analyzed 105 perineal injections into the pudendal nerve with a local anesthetic (LA), procaine in 20 patients. A 0.4 × 40 mm needle was handled using a stop-and-go technique while monitoring the patient's discomfort. The needle was placed 1-2 cm laterally to the dorsal introitus. After aspiration, a small amount of LA was applied. After subcutaneous anesthesia, the needle was further advanced step-by-step. Thus, 5 ml could be applied with little discomfort to the patient. Anesthesia in the pudendal target region was the primary endpoint of our analysis.

RESULTS

In 93 of 105 injections (88.6 %), complete perineal anesthesia was achieved with a single injection. 12 injections were repeated. These injections were excluded from the analysis. Severity of injection pain, on visual analog scale (VAS) from 0 to 100, was 26.8 (95 % CI 7.2-46.4). Age (β = 0.33, p < 0.01) and the number of previous injections (β = 0.35, p < 0.01) inversely correlated with injection pain. Injection pain and anesthesia were not affected by BMI, the number and the side of previous injections, or order of injection. A reversible vasovagal reaction was common, but no serious adverse effects occurred.

CONCLUSION

Perineal pudendal injection is an effective and safe technique for anesthesia in diagnostic (vulva biopsy) and therapeutic indications (pudendal neuralgia), and regional anesthesia in perinatal settings.

Pelvic floor therapies in chronic pelvic pain syndrome

Chronic pelvic pain syndrome is a poorly understood clinical entity associated with urinary symptoms, pelvic floor dysfunction, and multisystem disorders. Treatment of pelvic floor dysfunction is difficult and often frustrating for the patient as well as for the involved physician. The purpose of this review is to update clinicians on the latest research for the treatment of pelvic floor dysfunction in relation to chronic pelvic pain syndrome.

[Treatment algorithms for the management of chronic pelvic and perineal pain: from syndrome to treatment]

INTRODUCTION

The treatment of patients with chronic pelvic and perineal pain is often complex and involves a number of different parameters. The purpose of this article is to propose a series of treatment algorithms to facilitate the therapeutic management of patients with chronic pelvic and perineal pain.

MATERIAL AND METHODS

A review of the literature was performed by searching Pubmed for articles on treatment of chronic pelvic and perineal pain. Treatment algorithms were established for each type of pain syndrome.

RESULTS

Treatment algorithms were defined for the various types of chronic pain syndrome: pudendal nerve entrapment syndrome, chronic pelvic pain syndrome, painful bladder syndrome, vulvar pain syndrome, epididymotesticular pain syndrome, complex pelvic pain syndrome. Therapeutic management is proposed for each algorithm.

CONCLUSION

The proposed algorithms are designed to be a clinical aid and do not constitute a comprehensive approach to the management of patients with chronic pelvic and perineal pain.