Carpal Tunnel Release Surgery- A Systematic Review of Open and Endoscopic Approaches

Directly Visualized Carpal Tunnel Release via a Proximal Mini-Transverse Incision: Surgical Technique and Clinical Outcomes

Background/Objectives: Several complications and drawbacks have been described for the endoscopic release of carpal tunnel syndrome as well as for other traditional open and mini-open release techniques. The purpose of this study was to introduce our newly developed minimally invasive technique and report our surgical outcomes. Methods: Seventy-five eligible patients with carpal tunnel syndrome who underwent directly visualized carpal tunnel release via proximal mini-transverse incisions were enrolled. Turkish versions of the Quick-DASH, BCTSQ, and VAS were used to quantify the functional quality and pain intensity before surgery, at the third month, and at the final follow-up. In addition, the maximum preoperative and postoperative grip strength were evaluated. Results: At the three-month follow-up, there was a significant improvement in the mean VAS score and Quick-DASH score from 5.2 ± 1.4 and 27.46 ± 7 to 1.4 ± 1.1 and 10.2 ± 3.8, respectively. Additionally, significant improvements were observed in both BCTSQ components, the SSS and FSS, with mean preoperative scores of 3.6 ± 1.2 and 3.8 ± 0.9 and postoperative scores of 1.75 ± 0.6 and 2 ± 1, respectively. The Quick-DASH, BCTSQ scores, and VAS scores were further improved at the final follow-up. The mean grip strength gradually increased from 24.2 ± 8.9 kg to 28.2 ± 2.6 kg at the final follow-up. No complications occurred during or after the operation. Conclusions: Directly visualized carpal tunnel release via a proximal mini-transverse incision is a viable option for patients with moderate to severe CTS, as it has shown high levels of satisfaction, improved grip strength, and minimal complications.

The Role of Palmar Cutaneous Branch Release in Enhancing Surgical Outcomes for Severe Carpal Tunnel Syndrome

Background/Objectives: Carpal tunnel syndrome (CTS) is the most common entrapment neuropathy and various surgical techniques are used for its treatment. Extended open carpal tunnel release (EOCTR) has been proposed for improved nerve decompression. This study compares the clinical and functional outcomes of open carpal tunnel release (OCTR) and EOCTR in severe CTS, hypothesizing superior functional outcomes and lower pain levels with EOCTR. Methods: This retrospective study included 53 patients (45 females, 8 males) with severe CTS confirmed by electromyography. Patients underwent either OCTR (n = 28) or EOCTR (n = 25) between January 2020 and February 2023. The EOCTR techinque involved additional neurolysis of the recurrent motor branch and palmar cutaneous branch of the median nerve. Functional outcomes were assessed using the Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire, the Boston Carpal Tunnel Syndrome Questionnaire (BCTQ), the Visual Analog Scale (VAS) for pain, and hand strength measurements. Complications and recovery parameters were also analyzed. Results: EOCTR resulted in significantly lower postoperative VAS scores (3.31 vs. 3.78, p < 0.001), DASH scores (16.54 vs. 20.68, p < 0.001), and BCTQ symptom scores (1.87 vs. 2.01, p < 0.001). No significant differences were found in grip strength (p = 0.52) or pinch strength (tip-to-tip: p = 0.54, lateral: p = 0.061, 3-point: p = 0.17). No major complications occurred, and pillar pain was similar in both groups (p = 0.82), resolving with conservative treatment. Conclusions: EOCTR with additional palmar cutaneous branch of the median nerve neurolysis may provide better short-term functional outcomes and lower pain levels compared to OCTR in severe CTS. Further prospective studies are needed to validate the long-term benefits and safety of this surgical approach.

Surgical Technique for Performing Endoscopic Carpal Tunnel Release without Converting to an Open Technique, and Analysis of the Reasons for Conversion

OBJECTIVE

Endoscopic carpal tunnel release (ECTR) has advantages over open carpal tunnel release (OCTR); however, complications with ECTR are more likely to occur if the surgeon continues the procedure despite encountering difficulties. Techniques to minimize the need for conversion to OCTR have been infrequently discussed in the literature. This study aims to present a technique for performing ECTR without conversion to the open approach and to analyze the reasons for such conversions.

METHODS

A total of 1160 hands in 771 patients who underwent single-portal ECTR between January 2001 and December 2020 were analyzed. We evaluated the rate and reasons for conversion and compared clinical severity and electrodiagnostic grades between the ECTR and OCTR conversion groups to identify patient characteristics associated with conversion.

RESULTS

A total of 18 hands in 17 patients required conversion to OCTR (1.56%). In the first 5 years, 9 out of 251 ECTRs (3.59%) were converted, but since then, the conversion rate significantly decreased with increasing surgical experience. The most common reasons for conversion were poor visualization of the transverse carpal ligament due to the transbursal approach with a hypertrophic synovial membrane. As the preoperative clinical grade worsened, the conversion rate significantly increased. The OCTR conversion rate also tended to rise with more severe electrodiagnostic grades. Outcomes for all 18 wrists were successful at the 6-month follow-up.

CONCLUSIONS

A thorough subligamentous extrabursal approach is essential for achieving a clear endoscopic view of the transverse carpal ligament and performing ECTR without the need for conversion to open surgery.

Open surgery for carpal tunnel syndrome: is it necessary to release the antebrachial fascia? A randomized clinical trial study

Background

Open surgery for carpal tunnel syndrome (CTS) has historically involved release of the antebrachial fascia. The benefit of antebrachial fascia release in CTS surgery is still controversial. So, this study was designed to evaluate this hypothesis.

Methods

The study was designed as a two-arm randomized clinical trial study. Patients diagnosed with bilateral carpal tunnel syndrome were enrolled in the study, while those under 18 years of age and those with a history of carpal tunnel release, trauma to the spine, shoulder, or elbow, rheumatologic disease, inflammatory arthropathy, and CTS onset during pregnancy were excluded. The hands of the eligible patients were randomly assigned to two surgical groups. In the first group, the antebrachial fascia was opened to the proximal part, while in the second group, the fascia was opened from the central part of the deep layer to the distal volar part of the wrist. Pain severity, grip and pinch strength, symptom severity, and functional status were evaluated by the visual analog scale, the SAEHAN® hydraulic handgrip and pinch dynamometer, and the Boston Carpal Tunnel Questionnaire (BCTQ), respectively, at the baseline and 1, 3, and 6 months after surgery.

Results

Finally, 230 patients (220 women and 10 men, 460 hands) completed the study. The mean age of the patients was 50.4 ± 8.4 years. In both open surgery groups with and without antebrachial fascia release, the grip and pinch strength, BCTQ scores, and pain severity significantly improved at the end of the study (P < 0.01), but there was no statistically significant difference between the two groups (P > 0.05). Patient satisfaction improved in both groups; again, no significant difference was observed between the two groups (P > 0.05).

Conclusion

Both open CTS surgery with and without antebrachial fascia release show the same clinical and functional outcomes. Therefore, avoiding the release of the antebrachial fascia preserves proprioception and prevents iatrogenic injury to the median nerve and its branches. Conversely, a blunt release of the antebrachial fascia does not adversely affect the outcome.

Clinical Trial Registration

https://irct.behdasht.gov.ir/search/result?query=@irct_id:IRCT2012103111341N1, Identifier: IRCTID: IRCT2012103111341N1.

When Numbness and Tingling Play a Role-Sexual Function in Compressive Neuropathy

Purpose

Compressive neuropathies such as carpal tunnel and cubital tunnel syndrome can lead to sensation loss, muscle weakness, joint contractures, and disrupted sleep. The interplay between these conditions and the effect on patients' intimacy is unknown. The purpose of this study was to examine sexual function before and after surgery in patients undergoing carpal tunnel release or cubital tunnel release.

Methods

All patients 18 years or older who underwent unilateral or bilateral carpal tunnel release and/or cubital tunnel release, performed either open or endoscopically, between January 2021 and August 2022, were retrospectively identified. An anonymous 21-question survey assessing pre- and post-operative sexual function was sent electronically to patients who were between 3 months and 2 years postprocedure.

Results

A total of 47% of respondents reported that their upper extremity symptoms disrupted their sexual activity. Before surgery, various challenges were reported: paresthesia (84%), pain (61%), reduced strength (53%), and reduced motion (40%). A total of 65% of patients changed positions before surgery, most frequently by avoiding weight-bearing (79%) and using the affected arm (55%). After surgery, 61% reported an easier time engaging in sexual activity, which was most frequently attributed to diminished paresthesia (69%) and pain (67%). A total of 73% of patients resumed sexual activities within 3 weeks of surgery. Ultimately, 32% of patients were more satisfied with their sexual function after surgery.

Conclusions

Sexual function is intimately tied to the physical and mental health of individuals. Surgical release improves sexual function and satisfaction.

Type of study/level of evidence

Retrospective Case-Control Cohort, Therapeutic III.

Direct Variable Cost Comparison of Endoscopic Versus Open Carpal Tunnel Release: A Time-Driven Activity-Based Costing Analysis

INTRODUCTION

To improve the delivery of value-based health care, a deeper understanding of the cost drivers in hand surgery is warranted. Time-driven activity-based costing (TDABC) offers a more accurate estimation of resource utilization compared with top-down accounting methods. This study used TDABC to compare the facility costs of open carpal tunnel release (OCTR) and endoscopic carpal tunnel release (ECTR).

METHODS

We identified 845 consecutive, unilateral carpal tunnel release (516 open, 329 endoscopic) surgeries performed at an orthopaedic specialty hospital between 2015 and 2021. Itemized facility costs were calculated using a TDABC algorithm. Patient demographics, comorbidities, surgical characteristics, and itemized costs were compared between OCTR and ECTR. Multivariate regression was used to determine the independent effect of endoscopic surgery on true facility costs.

RESULTS

Total facility costs were $352 higher in ECTR compared with OCTR ($882 versus $530). ECTR cases had higher personnel costs ($499 versus $420), likely because of longer surgical time (15 versus 11 minutes) and total operating room time (35 versus 27 minutes). ECTR cases also had higher supply costs ($383 versus $110). Controlling for demographics and comorbidities, ECTR was associated with an increase in personnel costs of $35.74 (95% CI, $26.32 to $45.15), supply costs of $230.28 (95% CI, $205.17 to $255.39), and total facility costs of $265.99 (95% CI, $237.01 to $294.97) per case.

DISCUSSION

Using TDABC, ECTR was 66% more costly to the facility compared with OCTR. To reduce the costs related to endoscopic surgery, efforts to decrease surgical time and negotiate lower ECTR-specific supply costs are warranted.

LEVEL OF EVIDENCE

Economic and Decision Analysis Level II.

Carpal tunnel syndrome

Carpal tunnel syndrome (CTS) is the most common nerve entrapment disorder worldwide. The epidemiology and risk factors, including family burden, for developing CTS are multi-factorial. Despite much research, its intricate pathophysiological mechanism(s) are not fully understood. An underlying subclinical neuropathy may indicate an increased susceptibility to developing CTS. Although surgery is often performed for CTS, clear international guidelines to indicate when to perform non-surgical or surgical treatment, based on stage and severity of CTS, remain to be elucidated. Neurophysiological examination, using electrophysiology or ultrasonography, performed in certain circumstances, should correlate with the history and findings in clinical examination of the person with CTS. History and clinical examination are particularly relevant globally owing to lack of other equipment. Various instruments are used to assess CTS and treatment outcomes as well as the effect of the disorder on quality of life. The surgical treatment options of CTS - open or endoscopic - offer an effective solution to mitigate functional impairments and pain. However, there are risks of post-operative persistent or recurrent symptoms, requiring meticulous diagnostic re-evaluation before any additional surgery. Health-care professionals should have increased awareness about CTS and all its implications. Future considerations of CTS include use of linked national registries to understand risk factors, explore possible screening methods, and evaluate diagnosis and treatment with a broader perspective beyond surgery, including psychological well-being.

Optimizing Recovery After Carpal Tunnel Syndrome Release Surgery: The Role of Counseling in Pain Management and Perioperative Functional Enhancement

Background

Preoperative patient education is pivotal in improving patient outcomes during the perioperative phase, involving a thorough explanation of what patients can expect. This enhances adherence and reduces perioperative anxiety. In orthopedics, carpal tunnel syndrome, a common and painful hand condition, is effectively managed through surgical release under local anesthesia. Inadequate counseling before such procedures may intensify intraoperative anxiety and increase pain responses. Thus, this research aims to investigate the effects of comprehensive preoperative counseling on various parameters in carpal tunnel release surgery.

Methods

A case-control study design was adopted for this study. A retrospective analysis of patients who underwent carpal tunnel release surgery was performed. These patients were categorized into two distinct groups: one group received comprehensive counseling during their clinic visits, while the other group reported receiving less effective counseling. Evaluation encompassed patient-related factors, disease-related aspects, and perioperative variables for both groups.

Results

The study comprised 681 participants, with 526 (77.2%) being females, 421 (61.8%) undergoing surgery on the right side, and 519 (76.2%) employed in non-manual occupations. Moreover, 559 (82.1%) were non-smokers, while approximately two-thirds of the cohort had both diabetes and hypertension. The average age of participants was 52 years, and they reported a mean functional disability score of 7.2 out of 10. The comprehensive preoperative counseling group consisted of 333 patients, while the other group included 348 patients. The analysis revealed statistically significant differences between the two groups, including reduced intra-procedural anxiety (p = 0.043), decreased intraoperative pain (p = 0.005), lower rates of wound complications (p = 0.022), and improved self-reported pain relief (p = 0.3).

Conclusion

Our study emphasizes the crucial role of preoperative counseling in improving patient experiences during perioperative care, leading to reduced anxiety, milder pain responses, fewer complications, decreased reliance on postoperative pain medication, and increased self-reported pain relief.

Level of Evidence

Level III, Case-control retrospective study.

Surgical Interventions for the Management of Carpal Tunnel Syndrome: A Narrative Review

Carpal tunnel syndrome (CTS) is a severe condition that affects the hand, causing pain, numbness, paresthesia, and autonomic dysfunction caused by increased pressure, damage, and demyelination of the median nerve in the carpal tunnel. The most effective treatment for CTS is carpal tunnel release (CTR) via transverse carpal ligament (TCL) transect. We can apply decompression through endoscopic procedures; standard open techniques and minimally invasive wrist incisions can all be used to accomplish decompression. Superior outcomes have been reported in many studies, including patient satisfaction, symptom relief, improvements in multiple assessment modality results, and fewer complications. Soreness at the incision site, tenderness around the site of ligament release, transitory loss of motor or sensory function, and the need for a repeat operation are all postoperative consequences. There is minimal and low-quality evidence to support the effectiveness of postoperative rehabilitation, such as wrist orthoses, dressings, exercise, and ice therapy, which have benefited patients anecdotally.

Factors Associated with the Return to Work after Carpal Tunnel Release Surgery: A Cross-Sectional Study of the Worker Population

Background: There is controversy regarding the factors influencing the duration of sickness absence and return to work (RTW) after surgical treatment of carpal tunnel syndrome (CTS). This study aimed to determine factors related to RTW in these patients. Methods: This descriptive-analytical study was performed on all patients with CTS who underwent surgery in a main orthopaedic centre from December 2020 to April 2021. Patients were followed for 90 days after surgery for the RTW. The patients were classified into two groups based on the time of RTW, early (<21 days) and late (>21 days). These two groups were compared in terms of occupational, individual and disease-related factors and the type of surgery. Results: The mean time to RTW in patients was 23.2 ± 7.1 days, with a range of 7-60 days. There was a statistically significant relationship between early RTW and gender (female) (p = 0.005 OR = 6.5), non-manual work (p = 0.002 OR = 1.2), the total score of the Boston carpal tunnel questionnaire before surgery and job satisfaction (p = 0.04). The mean time to RTW in patients who underwent open surgery was less than in endoscopic surgery (22.89 ± 6.29 vs. 24.58 ± 4.7), but this difference was not statistically significant (p > 0.05). Conclusions: Based on the findings of our study, the type of surgery does not affect the RTW of patients with CTS. Considering the effect of job type and job satisfaction on RTW, it is recommended to pay attention to the type of occupation in addition to the type of surgery so that this workforce can RTW with good performance. Level of Evidence: Level IV (Therapeutic).

Efficiency of Direct Transcutaneous Electroneurostimulation of the Median Nerve in the Regression of Residual Neurological Symptoms after Carpal Tunnel Decompression Surgery

Carpal tunnel syndrome (CTS) is the most frequent entrapment neuropathy. CTS therapy includes wrist immobilization, kinesiotherapy, non-steroidal anti-inflammatory drugs, carpal tunnel steroid injection, acupuncture, and physical therapy. Carpal tunnel decompression surgery (CTDS) is recommended after failure of conservative therapy. In many cases, neurological disorders continue despite CTDS. The aim of this study was to investigate the efficiency of direct transcutaneous electroneurostimulation (TENS) of the median nerve in the regression of residual neurological symptoms after CTDS. Material and Methods: 60 patients aged 28-62 years with persisting sensory and motor disorders after CTDS were studied; 15 patients received sham stimulation with a duration 30 min.; 15 patients received high-frequency low-amplitude TENS (HF TENS) with a duration 30 min; 15 patients received low-frequency high-amplitude TENS (LF TENS) with a duration 30 min; and 15 patients received a co-administration of HF TENS (with a duration of15 min) and LF TENS (with a duration of 15 min). Results: Our research showed that TENS significantly decreased the pain syndrome, sensory disorders, and motor deficits in the patients after CTDS. Predominantly, negative and positive sensory symptoms and the pain syndrome improved after the HF TENS course. Motor deficits, reduction of fine motor skill performance, electromyography changes, and affective responses to chronic pain syndrome regressed significantly after the LF TENS course. Co-administration of HF TENS and LF TENS was significantly more effective than use of sham stimulation, HF TENS, or LF TENS in patients with residual neurological symptoms after CTDS.

Endoscopic carpal surgery in carpal tunnel syndrome: A systematic review

Objective

Endoscopic carpal tunnel release has become increasingly popular and has shown the advantage of early recovery of hand function with minimal morbidity. In this systematic review, we aimed to summarize the currently available data and describe the reported advantages and disadvantages of endoscopic carpal tunnel surgery for treating carpal tunnel syndrome.

Methods

In this study, we followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses, which is a set of reporting requirements for systematic reviews and meta-analyses. The search strategy with MeSH terms was "MeSH (carpal tunnel syndrome) AND (endoscopic)" Filters: in the last 5 years, English-on February 27th, 2022. A total of 131 articles fulfilled the first screening criteria. A detailed analysis of those articles identified 39 that matched the criteria, of which 14 were considered appropriate for this analysis after applying the complete inclusion and exclusion criteria.

Results

A total of 14 studies met the eligibility criteria. Analysis of those studies found that all types of portals in endoscopic carpal tunnel release reduced postoperative pain at a short-term follow-up. There was no evidence to suggest the superiority of the single- or two-portal techniques in terms of outcomes. In terms of pain relief, symptom resolution, patient satisfaction, duration to return to work, and adverse events, this early use of endoscopic carpal tunnel release produced satisfactory outcomes. Further studies comparing the number of portals are needed.

Conclusion

Endoscopic carpal tunnel surgery for treating carpal tunnel syndrome is effective and both single- and dual-portal techniques provide advantages in terms of early recovery and minimal morbidity.

Outcomes Following Endoscopic versus Open Carpal Tunnel Release-A Matched Study

OBJECTIVE

Carpal tunnel syndrome (CTS) is the most common entrapment neuropathy in the world. Surgical treatment can be performed in an open or endoscopic fashion. To date, similar rates of complications for both approaches have been described. We sought to compare the results of endoscopic carpal tunnel release (ECTR) with open carpal tunnel release (OCTR) in patients with CTS.

METHODS

Patients with a diagnosis of CTS undergoing open or endoscopic surgical management were identified between January 2010 and October 2020. The primary outcome of the study was nerve injury within 30 days of the procedure. Secondary outcomes included readmission, wound-related complications, hematoma, seroma formation, and cost.

RESULTS

A total of 735,631 patients were identified as undergoing CTR. Following a 1:1 match procedure, 292,626 patient records were analyzed. Patients undergoing OCTR versus ECTR had an increased odds of readmission at 30 days (odds ratio [OR] 1.89, 95% confidence interval [CI] 1.73-2.06), developing an infection (OR 1.59, 95% CI 1.41-1.80), and experiencing wound complications (OR 1.97, 95% CI 1.74-2.23). No significant difference in odds of developing a seroma (OR 1.17, 95% CI 0.83-1.65), hematoma (OR 1.15, 95% CI 0.95-1.39), or nerve injury (OR 1.18, 95% CI 0.98-1.43) was noted. The reimbursement cost of ECTR was significantly greater than OCTR ($310.60 ± $1639.57 vs. $237.69 ± $1488.93, P < 0.001).

CONCLUSIONS

In the largest study to date on the surgical management of CTR, OCTR was seen to be associated with an increased odds of readmission, infection, and wound complications, but reduced costs for the procedure alone.

Update on surgical procedures for carpal tunnel syndrome: What is the current evidence and practice? What are the future research directions?

Carpal tunnel syndrome (CTS) is a multifactorial compression neuropathy. It is reported to be very common and rising globally. CTS's treatment varies from conservative measures to surgical treatments. Surgery has shown to be an effective method for more severe cases. However few unclear aspects and room for further research and improvements still remains. We performed a narrative literature review on the most up to date progress and innovation in terms of surgical treatments for CTS. The simple algorithm of leaving the choice of the surgical method to surgeons' preference and experience (together with consideration of patients' related factors) seem to be the best available option, which is supported by the most recent metanalysis and systematic reviews. We suggest that surgeons (unless in presence of precise indications towards endoscopic release) should tend to perform a minimally invasive open approach release, favoring the advantage of a better neurovascular structures visualization (and a consequent higher chance to perform a complete release with long term relief of symptoms) instead of favoring an early reduction (in the first postoperative days) of immobilization and pain. Research towards a universally accepted standardization should be aimed for by the researchers, who have failed to date to sufficiently limit bias and limitations.

Research advances and trends in the surgical treatment of carpal tunnel syndrome from 2003 to 2022: A CiteSpace-based bibliometric analysis

Background

Carpal Tunnel Syndrome (CTS) is one of the most common peripheral neuropathies. The typical symptoms are tingling and numbness in the median nerve distribution of the hand. Current treatment for CTS includes general conservative treatment and surgical treatment. Surgical treatment plays a crucial role in the management of CTS, but little bibliometric analysis has been conducted on it. Therefore, this study aimed to map the literature co-citation network using CiteSpace (6.1 R4) software. Research frontiers and trends were identified by retrieving subject headings with significant changing word frequency trends, which can be used to predict future research advances in the surgical treatment of CTS.

Methods

Publications on the surgical treatment of CTS in the Web of Science database were collected between 2003 and 2022. CiteSpace software was applied to visualize and analyze publications, countries, institutions, journals, authors, references, and keywords.

Results

A total of 336 articles were collected, with the USA being the major publishing power in all countries/regions. JOURNAL OF HAND SURGERY AMERICAN VOLUME was the journal with the most published and co-cited articles. Based on keyword and reference co-citation analysis, keywords such as CTS, surgery, release, median nerve, and diagnosis were the focus of the study.

Conclusion

The results of this bibliometric study provide clinical research advances and trends in the surgical treatment of patients with CTS over the past 20 years, which may help researchers to identify hot topics and explore new directions for future research in the field.

[Post-traumatic pain mononeuropathies]

Neuropathic pain syndrome (NPS) caused by peripheral nerve (PN) injury is a serious clinical problem due to its prevalence, complexity of pathogenesis, significant impact on the quality of life of patients. The issues of epidemiology, pathogenesis and treatment of patients with NBS with PN injury are considered. Modern possibilities of invasive treatment of such patients are discussed.

An Experience With an Exoscope System (ORBEYE) for Surgery for Tarsal Tunnel Syndrome: A Case Report

Surgery for peripheral entrapment neuropathy aims to decompress the affected nerve and optimize the visualization of anatomical details during surgery. This paper describes our experience using the ORBEYE exoscope (Olympus) during surgery for tarsal tunnel syndrome (TTS).

The patient was a 70-year-old male with complaints of bilateral pain and numbness on the plantar surface of the bilateral soles and medial halves of both lower limbs. He was diagnosed with idiopathic TTS with the American Orthopedic Foot and Ankle Score (AOFAS) of 20/100. Surgery for the right foot was performed under local anesthesia with the patient’s body in the lateral position. All procedures were performed using the ORBEYE exoscope view. The posterior tibial artery (PTA) was transposed, and the flexor retinaculum was reconstructed between the PTA and posterior tibial nerve. Indocyanine green (ICG) video angiography confirmed the absence of PTA flow disturbance. One month after the first operation, left foot surgery was performed. Three months later, the AOFAS had improved from 20/100 to 50/100.

The ORBEYE exoscope is useful in TTS treatment and represents a feasible and comfortable technique for entrapment neuropathy surgery. In addition, ICG capability is an effective tool for confirming blood flow in PTA after transposition.

The Relevance of Collision Tests and Quantitative Sensory Testing in Diagnostics and Postoperative Outcome Prediction in Carpal Tunnel Syndrome

Background

The gold standards for the diagnosis and treatment of carpal tunnel syndrome (CTS) and its outcome are undecided. Using clinical and electrophysiological methods, we tried to establish which fibers achieved full postoperative recovery, and the possibility of using non-standard electrophysiological tests as outcome predictors.

Methods

The study group consisted of 35 patients and controls. The Historical–Objective Scale, standard neurography, conduction velocity distribution tests (CVD), and quantitative sensory testing (QST) were performed before and after CTS surgery.

Results

Clinical improvement was observed on average in 54.3% of the patients, higher in less advanced CTS. All parameters improved significantly after surgery, except for CVD; most remained worse than in the controls. Only QST parameters fully returned to normal limits. Patient age and CTS severity were important in the estimation of the risk of no improvement.

Conclusions

The efficiency of minimally invasive CTS surgery is higher in younger patients with less advanced CTS. Complete recovery was present only in small fibers; larger fibers could most likely be responsible for residual signs. We did not notice any benefits in CTS diagnosis using methods of small fiber assessment. QST seemed to be useful in the diagnosis of residual signs, and in deciding upon possible reoperation.

Minimally Invasive Carpal Tunnel Release: A Technical Note and a 20-Year Retrospective Series

Introduction

The surgical treatment of carpal tunnel syndrome (CTS) has been enriched, during the last years, by different minimally invasive techniques to decompress the median nerve at the wrist as the endoscopic approaches or modified open technique. However, controversy remains about their safety and complication rate. We present the results of our minimally-invasive technique to median nerve release at the wrist. We will discuss the instrumental preoperative assessment, surgical steps, post-operative management, and complications.

Methods

We retrospectively reviewed clinical and neurophysiological data of all patients admitted at our institution between January 2001 and December 2020 for CTS surgery. The technique, performed under local anesthesia, is based on a single, small, linear transverse incision proximal to the wrist fold. After unsharpened dissection of subcutaneous tissues, a grooved guide is inserted in a slightly medial direction towards the fourth finger; this strategy prevents possible damages of nerve branches that could originate at this level. A second small incision over the guide’s tip allows a wide corridor in the context of the ligament. The carpalotome is then inserted into the guide; the two minor wounds are closed with 5-0 prolene sutures. The final result is a wide release of the nerve.

Results

A total of 1568 operations on 1371 patients were performed using the described technique at our institution. The patients’ cohort showed a higher prevalence of women (68%), with a mean age of 56.4 years (range 24-88 years). Paresthesia and numbness of the first three fingers were the most frequent signs and symptoms. All patients were submitted to a preoperative electrophysiological evaluation, which revealed the typical signs of CTS in most patients. The US evaluation of the median nerve at the wrist was a more recent introduction, dating from 2018. In 47 patients, despite an electromyography (EMG) not showing marked neurophysiological signs of severe CTS, the ultrasonographic evaluation was strongly consistent with the clinical diagnosis. In such patients, carpal tunnel release determined the resolution of symptoms. In 99.8% of total cases, we obtained a complete symptoms remission, with the disappearance of acroparesthesia and numbness.

Conclusion

The use of this technique has become widespread at our institution due to fewer local complications, a very low rate of recurrence, faster functional recovery, and reduced surgical time if compared to traditional open surgery and to endoscopic release too.

Supraclavicular vs. Infraclavicular Brachial Plexus Nerve Blocks: Clinical, Pharmacological, and Anatomical Considerations

Peripheral nerve blocks (PNB) have become standard of care for enhanced recovery pathways after surgery. For brachial plexus delivery of anesthesia, both supraclavicular (SC) and infraclavicular (IC) approaches have been shown to require less supplemental anesthesia, are performed more rapidly, have quicker onset time, and have lower rates of complications than other approaches (axillary, interscalene, etc.). Ultrasound-guidance is commonly utilized to improve outcomes, limit the need for deep sedation or general anesthesia, and reduce procedural complications. Given the SC and IC approaches are the most common approaches for brachial plexus blocks, the differences between the two have been critically evaluated in the present manuscript. Various studies have demonstrated slight favorability towards the IC approach from the standpoint of complications and safety. Two prospective RCTs found a higher incidence of complications in the SC approach - particularly Horner syndrome. The IC method appears to support a greater block distribution as well. Overall, both SC and IC brachial plexus nerve block approaches are the most effective and safe approaches, particularly under ultrasound-guidance. Given the success of the supraclavicular and infraclavicular blocks, these techniques are an important skill set for the anesthesiologist for intraoperative anesthesia and postoperative analgesia.

Novel Regional Nerve Blocks in Clinical Practice: Evolving Techniques for Pain Management

This review examines the use of novel US-guided nerve blocks in clinical practice. Erector spinae block is a regional anesthesia technique doing by injecting a local anesthetic among the erector spinae muscle group and transverse processes. The phrenic nerve is a branch of the cervical plexus, arising from the anterior rami of cervical nerves C3, C4, and C5. The quadratus lumborum muscle is located along the posterior abdominal wall. It originates from the transverse process of the L5 vertebral body, the iliolumbar ligament, and the iliac crest. US-guided peripheral nerve procedures have a considerable scope of use, including treating headaches and hiccups to abdominal surgical pain, cesarean sections, musculoskeletal pathologies. These nerve blocks have been an effective addition to clinical anesthesia practice. The use of peripheral nerve blocks has improved postoperative pain, lessened the use of opioids and their potential side effects, and decreased the incidence of sleep disturbance in patients. More research should be done to further delineate the potential benefits of these blocks.

Surgical and Non-surgical Treatment Options for Piriformis Syndrome: A Literature Review

CONTEXT

Piriformis syndrome is a solely clinical diagnosis that often eludes the practitioner and goes underdiagnosed. PS is a pain syndrome and for those it affects, causes persistent pain and limits daily activity and work capacity. It is a form of deep gluteal syndrome that needs to be considered on the differential of low back pain as it comprises between 0.3% - 6% of all low back pain cases and is frequently underdiagnosed. Piriformis syndrome may be primary due anatomic anomalies or secondary, though the majority of cases are secondary to some insult. The objective of this manuscript is to provide a description of the epidemiology and presentation of piriformis as well as both non-operative and operative treatment options. We review all of the recent clinical evidence regarding the aforementioned therapies.

EVIDENCE ACQUISITION

Literature searches were performed using the below MeSH Terms using Mendeley version 1.19.4. Search fields were varied until further searches revealed no new articles. All articles were screened by title and abstract. Decision was made to include an article based on its relevance and the list of final articles was approved three of the authors. This included reading the entirety of the article. Any question regarding the inclusion of an article was discussed by all authors until an agreement was reached.

RESULTS

Medical management and physical therapy show some promise; however, when conservative treatment fails minimally invasive methods such as steroid injections, botulinum toxin injections, dry needling are all efficacious and there is substantial clinical evidence regarding these therapies. In those patients in which minimally invasive techniques do not result in an adequate relief of pain and return of function, endoscopic release can be considered. Endoscopic release is far superior to open release of the piriformis syndrome given the higher success and lower rate of complications.

CONCLUSIONS

Piriformis syndrome is an important differential diagnosis in the work up of lower back pain and should not be ruled out with proper examination and testing. Clinicians should consider medical management and conservative management in the initial treatment plan for piriformis syndrome. There are many options within the conservative management and the literature shows much promise regarding these. Physical therapy, steroid injections, botulinum toxin injections, and dry needling are all potentially effective therapies with few adverse effects. Surgical options remain as gold standard, but only when conservative management has failed and the symptoms are significant to affect daily living activities. Endoscopic decompression of the sciatic nerve with or without release of the piriformis muscle has a reported high likelihood of success and a low complication rate. Current literature supports the preference of the endoscopic approach over the open approach due to improved outcomes and decreased complications. Further research is to well define the metrics for the diagnosis of piriformis syndrome and may include a need to develop diagnostic criteria.

Etiology Diagnosis and Management of Radial Nerve Entrapment

CONTEXT

The anatomy of the radial nerve is prone to entrapment, each with different symptomology. Compression of entrapment of the radial nerve can occur near the radiocapitellar joint, the spiral groove, the arcade of Frohse, the tendon of the extensor carpi radialis brevis (ECRB), and at the radial tunnel. Those who require repetitive motions are at increased risk of peripheral neuropathy syndromes, including repetitive pronation and supination, trauma, or systemic disease; however, t the influence of all risk factors is not well understood. Depending on the location of entrapment, radial nerve entrapment syndrome presents different symptoms. It may include both a motor component and a sensory component. The motor component includes a dropped arm, and the sensory component can include pain and paresthesia in the distribution of the radial nerve that resolves with rest and exacerbates by repetitive pronation and supination.

EVIDENCE ACQUISITION

Diagnostic evaluation for radial nerve entrapment, apart from clinical symptoms and physical exam, includes electromyography, nerve conduction studies, ultrasonography, and magnetic resonance imaging. Conservative management for radial nerve entrapment includes oral anti-inflammatory medications, activity modification, and splinting. Some recently performed studies mentioned promising minimally invasive techniques, including corticosteroid injections, peripheral nerve stimulation, and pulsed radiofrequency.

RESULTS

When minimally invasive techniques fail, open or endoscopic surgery can be performed to release the nerve.

CONCLUSIONS

Endoscopic surgery has the benefit of decreasing incision size and reducing time to functional recovery.

An Update on Treatment Modalities for Ulnar Nerve Entrapment: A Literature Review

CONTEXT

Ulnar nerve entrapment is a relatively common entrapment syndrome second only in prevalence to carpal tunnel syndrome. The potential anatomic locations for entrapment include the brachial plexus, cubital tunnel, and Guyon's canal. Ulnar nerve entrapment is more so prevalent in pregnancy, diabetes, rheumatoid arthritis, and patients with occupations involving periods of prolonged elbow flexion and/or wrist dorsiflexion. Cyclists are particularly at risk of Guyon's canal neuropathy. Patients typically present with sensory deficits of the palmar aspect of the fourth and fifth digits, followed by motor symptoms, including decreased pinch strength and difficulty fastening shirt buttons or opening bottles.

EVIDENCE ACQUISITION

Literature searches were performed using the below MeSH Terms using Mendeley version 1.19.4. Search fields were varied until further searches revealed no new articles. All articles were screened by title and abstract. Decision was made to include an article based on its relevance and the list of final articles was approved three of the authors. This included reading the entirety of the artice. Any question regarding the inclusion of an article was discussed by all authors until an agreement was reached.

RESULTS

X-ray and CT play a role in diagnosis when a bony injury is thought to be related to the pathogenesis (i.e., fracture of the hook of the hamate.) MRI plays a role where soft tissue is thought to be related to the pathogenesis (i.e., tumor or swelling.) Electromyography and nerve conduction also play a role in diagnosis. Medical management, in conjunction with physical therapy, shows limited promise. However, minimally invasive techniques, including peripheral percutaneous electrode placement and ultrasound-guided electrode placement, have all been recently studied and show great promise. When these techniques fail, clinicians should resort to decompression, which can be done endoscopically or through an open incision. Endoscopic ulnar decompression shows great promise as a surgical option with minimal incisions.

CONCLUSIONS

Clinical diagnosis of ulnar nerve entrapment can often be delayed and requires the suspicion as well as a thorough neurological exam. Early recognition and diagnois are important for early institution of treatment. A wide array of diagnostic imaging can be useful in ruling out bony, soft tissue, or vascular etiologies, respectively. However, clinicians should resort to electrodiagnostic testing when a definitive diagnois is needed. Many new minimally invasive techniques are in the literature and show great promise; however, further large scale trials are needed to validate these techniques. Surgical options remains as a gold standard when adequate symptom relief is not achieved through minimally invasive means.