Does the Duration and Severity of Symptoms Have an Impact on Relief of Symptoms after Carpal Tunnel Release?

Exploring patient perception of decision-making in carpal tunnel release surgery: A systematic review and thematic synthesis of qualitative studies

Background

Carpal tunnel syndrome is a common condition, but some controversies remain regarding diagnostics and the most effective treatments. As a result, patients often experience decisional conflicts, especially when considering carpal tunnel release surgery. Understanding factors that influence decision-making in surgery can help clinicians better grasp patient treatment preferences and priorities, reducing decisional conflicts, and enabling patients to make informed, value-aligned choices through shared decision-making. This qualitative evidence synthesis aims to explore patient perceptions of carpal tunnel release, examine the decision-making factors, and critically appraise and synthesise the existing evidence.

Methods

A systematic search was conducted across four electronic databases (MEDLINE, EMBASE, CINAHL Ultimate, PsycINFO) from inception to August 2023, supplemented by referencing and citation searching to identify eligible qualitative studies. Thematic synthesis was adopted as synthesis methodology, involving a line-by-line coding of the primary study findings, and the development of descriptive and analytical themes. Quality appraisal was conducted using the modified Critical Appraisal Skills Programme checklist, supplemented with the COnsolidated criteria for REporting Qualitative research checklist.

Results

Synthesis of six qualitative studies encompassing 66 participants generated five analytical themes: (1) Journey to normalcy, (2) Patient-centred care, (3) Work and life considerations, (4) Weighing up alternatives, and (5) Shaping the expectations, highlighting the complexity of patient decision-making in carpal tunnel release.

Discussion

In the management of carpal tunnel syndrome, therapists should consider various decision-making factors, prioritising communication and shared decision-making. This, along with personalised interactions, achieves patient-centred care and enhances patient care quality and therapeutic alliance.

Adherence to Non-operative Clinical Quality Measures in Carpal Tunnel Syndrome

Background: Clinical quality measures exist for non-operative management of carpal tunnel syndrome (CTS). Factors predicting adherence are unclear. Methods: A retrospective cohort study of patients with chronic CTS using MarketScan Research Database (2015-2020) was conducted. Six logistic regression models were designed to study adherence to quality measures within 1 year after diagnosis. Results: Of 782,717 patients identified, 514,073 (65.7%) were female with an average (SD) age of 51.4 (13.4) years. Only 88 patients (0.01%) met all quality measures. Greatest compliance observed with receipt of nerve conduction study (NCS; 283,959 [36.3%]), no prescription of medications (336,297 [43.0%]) and no laser therapy (772,979 [98.8%]); 294,305 patients (37.6%) received hand surgeon referral. Hand surgeon referral predicted higher likelihood of NCS and splinting (OR, 1.83; 95% CI: 1.81-1.84; OR, 2.53; 95% CI: 2.50-2.56) and medication over-prescription (OR, 1.05; 95% CI: 1.00-1.10). Females were more likely to be referred to a hand surgeon and be referred for splinting (OR 1.02; 95% CI: 1.01-1.03; OR 1.19; 95% CI: 1.18-1.21) but less likely to have no prescriptions or avoid laser therapy (OR 0.85, 95% CI: 0.84-0.85; OR 0.82, 95% CI: 0.79-0.86). Medicare recipients adhered less to quality measures compared to patients with fee-for-service insurance. As comorbidities increased, patients were less likely to receive hand surgeon referral and carpal tunnel release. Conclusions: Findings suggest that hand surgery referrals increased adherence to quality measures. Females, Medicare recipients and multimorbid patients should be targeted for improved care. Future quality care efforts should incentivise adherence for Medicare beneficiaries and improve guideline recognition amongst physicians. Level of Evidence: Level III (Therapeutic).

Surgical treatment delay in patients with headache disorders and neuralgia correlates with poor postoperative outcome

INTRODUCTION

Although nerve decompression surgery has proven to be effective in reducing symptoms in patients with head and neck neuralgia and headache disorders, it is currently not part of the treatment algorithms for headache disorders. Therefore, patients wait an average of 20 years from the onset of symptoms to surgery, resulting in high conservative treatment costs ($989,275.65 per patient) and patient morbidity. This study evaluated the clinical impact of treatment delays on surgical outcomes.

METHODS

Overall, 282 patients who underwent nerve decompression surgery at Weill Cornell Medicine and Massachusetts General Hospital between September 2012 and January 2024 were enrolled. Information regarding demographics, onset of symptoms, and headache characteristics was collected using patient surveys. The treatment outcome was evaluated by the percentage of symptom reduction in terms of frequency, duration, and pain intensity. An area under the receiver operating characteristic analysis was performed to determine the optimal timepoint to undergo surgery.

RESULTS

Postoperative symptom reduction and time between the onset of symptoms and surgery were negatively correlated (r = -0.22; p < 0.001). The most significant difference in outcome was found at 2.9 years from symptom onset; patients who underwent surgery before this timepoint reported an average improvement of 79 ± 23% versus 67 ± 35% in those who were treated after the timepoint (p = 0.021).

CONCLUSION

Our results indicate that delays in undergoing nerve decompression surgery beyond 2.9 years from symptom onset leads to less favorable postoperative outcomes, underscoring the need for timely referral to peripheral nerve surgeons when conservative management fails. Nonetheless, even with delays in surgical intervention, patients continued to experience significant symptom reduction.

Median Nerve Measurement and Steroid Injection for Carpal Tunnel Syndrome: A Case Report

Introduction

Carpal tunnel syndrome is an entrapment neuropathy that affects 3% of adults in the United States. The current techniques used for diagnosis have limited specificity/sensitivity, and the techniques used for treatment have limited efficacy.

Case Report

A 34-year-old female presented to the emergency department with two months of worsening painful paresthesias in her right thenar eminence. Ultrasound was performed showing a median nerve area of 20.4 square millimeters within the carpal tunnel. Median nerve block was performed within the carpal tunnel causing complete resolution of her pain.

Conclusion

Emergency physicians skilled in point-of-care ultrasound and needle-guided procedures can diagnose and treat carpel tunnel syndrome.

How Does Nerve Mechanical Interface Treatment Impact Pre-Surgical Carpal Tunnel Syndrome Patients? A Randomized Controlled Trial

BACKGROUND

Carpal tunnel syndrome (CTS) presents a high burden on the healthcare system. However, no alternative treatments are provided during the waiting period. In addition, the incidence of severe patients with comorbidities is underestimated. The aim of this study was to determine whether nerve mechanical interface treatment improves the symptoms, function, and quality of life in pre-surgical CTS patients.

METHODS

A randomized controlled trial and intention-to-treat analysis were carried out. Forty-two patients with an electrodiagnosis of carpal tunnel syndrome, included on the surgery waiting list of a public healthcare system, were analyzed. The intervention group (n = 20) received a 45 min session/per week of instrument-assisted manual therapy (diacutaneous fibrolysis) for 3 weeks. The Boston Carpal Tunnel Questionnaire (BCTQ) was the primary outcome. The symptoms, mechanical threshold, grip strength, mechanosensitivity of the median nerve, quality of life, and patient satisfaction were included as secondary outcomes. The control group (n = 22) remained on the waiting list.

RESULTS

The intervention seems to be beneficial for the BCTQ score (function and symptoms scale), pain, and mechanosensitivity after treatment, at the 3 and 6 months follow-up (p < 0.05). Kinesiophobia was improved at 6 months (p = 0.043; η2 = 0.10) and the mechanical threshold at the 3-month follow-up (p = 0.048; η2 = 0.10). No differences were identified for grip strength. At 6 months, the intervention group patients were satisfied (100%), as opposed to the controls, who felt that they had experienced a worsening of their condition (50.1%).

CONCLUSIONS

Nerve mechanical interface treatment improved the symptoms, function, and quality of life in pre-surgical CTS patients. One hundred percent of the treated patients, characterized as moderate and severe CTS with associated comorbidities, were satisfied.

Implications of Patient-Provider Concordance on Treatment Recommendations for Carpal Tunnel Syndrome

Purpose

Differences in the utilization of carpal tunnel release (CTR) by Blacks and women are well documented, but less is known regarding the impact of patient-provider concordance on treatment recommendations. To investigate this, we surveyed hand surgeons using hypothetical scenarios to evaluate variations in treatment recommendations for carpal tunnel syndrome based on patient-related factors and patient-provider concordance.

Methods

Three pairs (six total) of hypothetical scenarios with clinical symptoms of carpal tunnel syndrome were created varying sex, race, and occupation. We used names as a proxy for sex and race. Occupation included manual laborers, secretaries, athletes, and retirees. American Society for Surgery of the Hand members were emailed an anonymous web-based link to participate. We used descriptive statistics to analyze the scenario-based treatment recommendations.

Results

We identified 3,067 eligible members for participation; 770 surgeons responded (25%) and provided recommendations for 3,742 scenarios. For scenarios involving symptomatic patients without electrodiagnostic studies (EDS), with normal EDS, and with abnormal EDS, no difference was noted in surgeon treatment recommendations based on patients' race, sex, and occupation. Surgeons recommended EDS for 31% and 32.8% of the scenarios with Black female and White male patients, respectively, who did not have EDS at presentation and CTR for 32.3% and 33% of White females and Black males with normal EDS, respectively. Among retired Black female and White male patients older than 80 years of age with abnormal EDS, surgeons recommended CTR in 89.9% and 89.3% of them, respectively. For patient-provider racially concordant pairs, White surgeons recommended CTR to a similar proportion of Black and White hypothetical patients; however, Black surgeons recommended CTR to a greater proportion of patients with Black-sounding names.

Conclusions

We found that surgeon treatment recommendation was not associated with patient race, sex, or occupation; however, differences did emerge based on patient-provider racial concordance, suggesting that alignment of patient and provider identities may influence treatment recommendations.

Type of study/level of evidence

Prognostic III.

An Analysis of Treatment Choices among White and African American Medicaid Patients with Carpal Tunnel Syndrome

BACKGROUND

Carpal tunnel syndrome (CTS) is the most common compressive neuropathy and has severe long-term effects on hand function if surgery is delayed significantly following diagnosis. The authors investigated the timespan between diagnosis and surgical intervention for carpal tunnel syndrome among African American and White patients on Medicaid.

METHODS

Using the MarketScan Truven Database Medicaid Supplement 2009 to 2020, the authors identified patients with CTS. Demographic data and time intervals between diagnosis and treatment were collected and analyzed using chi-square test and regression models.

RESULTS

A total of 361,942 African American and White Medicaid patients with a diagnosis of CTS were included in the study. Overall, 21.4% of White patients compared with 13.6% of African American patients chose surgery as their first and only option ( P < 0.001). A greater proportion of White patients underwent surgery less than 6 months after diagnosis compared with African Americans (75.5% and 67.7%, respectively; P < 0.001). African American women underwent surgery at a significantly lower rate compared with White women (13.8% and 21.8%, respectively); P < 0.001). Despite the increase in rates of surgery among both groups, the gap in use of surgery widened from a 6.6% difference in 2009 to a difference of 9.5% in 2020 between racial groups.

CONCLUSIONS

African American race and female sex are significantly correlated with choice of treatment and time to surgery among Medicaid patients with CTS. Identification of the relationship between health care disparities and the decision to undergo surgery is the first step in the development of strategies to mitigate underuse of this quality-of-life-improving procedure.

Neurostimulation in severe carpal tunnel release: A more precise technique for opponensplasty decision-making

OBJECTIVES

In this study, we aimed to investigate the relationship between intraoperative thenar muscle neurostimulation responses and postoperative thumb function recovery in patients with severe carpal tunnel syndrome (CTS).

PATIENTS AND METHODS

Between January 2019 and December 2021, a total of 21 severe CTS cases in 20 patients (7 males, 13 females; mean age: 56.3±19.3 years; range, 52 to 76 years) based on clinical and electrophysiological findings were retrospectively analyzed. The median nerve motor branch (MNMB) was stimulated intraoperatively with a nerve stimulator. The patients were divided into two groups according to contraction response on abductor pollicis brevis (APB) muscle: Group C (contractile, n=13) and Group NR (non-responsive, n=7) with and without muscular contraction. The Levine Functional Severity Scale (LFSS) was used to measure the functional status of CTS patients. The Manual Muscle Testing (MMT) was used to assess muscle strength. Clinical outcomes were compared between the groups at one year of follow-up.

RESULTS

The mean total preoperative LFSS score was significantly higher in Group NR than in Group C (p=0.010). The mean postoperative MMT score was significantly higher in Group C than in Group NR (p<0.001). There was no positive result in pick-up, button fastening, and needle pinch tests in Group NR (p<0.001). However, there were significant improvements in postoperative LFSS scores in Group C (p<0.05), while the scores remained unchanged in Group NR (p>0.05).

CONCLUSION

Direct stimulation of the median nerve motor branch and observation of contraction response on APB muscle can be used to predict clinical recovery and facilitates making the decision for opponensplasty in severe CTS.

Mechanomyography as a Surgical Adjunct for Treatment of Chronic Entrapment Neuropathy: A Case Series

BACKGROUND

Chronic entrapment neuropathy results in a clinical syndrome ranging from mild pain to debilitating atrophy. There remains a lack of objective metrics that quantify nerve dysfunction and guide surgical decision-making. Mechanomyography (MMG) reflects mechanical motor activity after stimulation of neuromuscular tissue and may indicate underlying nerve dysfunction.

OBJECTIVE

To evaluate the role of MMG as a surgical adjunct in treating chronic entrapment neuropathies.

METHODS

Patients 18 years or older with cubital tunnel syndrome (n = 8) and common peroneal neuropathy (n = 15) were enrolled. Surgical decompression of entrapped nerves was performed with intraoperative MMG of the hypothenar and tibialis anterior muscles. MMG stimulus thresholds (MMG-st) were correlated with compound muscle action potential (CMAP), motor nerve conduction velocity, baseline functional status, and clinical outcomes.

RESULTS

After nerve decompression, MMG-st significantly reduced, the mean reduction of 0.5 mA (95% CI: 0.3-0.7, P < .001). On bivariate analysis, MMG-st exhibited significant negative correlation with common peroneal nerve CMAP ( P < .05), but no association with ulnar nerve CMAP and motor nerve conduction velocity. On preoperative electrodiagnosis, 60% of nerves had axonal loss and 40% had conduction block. The MMG-st was higher in the nerves with axonal loss as compared with the nerves with conduction block. MMG-st was negatively correlated with preoperative hand strength (grip/pinch) and foot-dorsiflexion/toe-extension strength ( P < .05). At the final visit, MMG-st significantly correlated with pain, PROMIS-10 physical function, and Oswestry Disability Index ( P < .05).

CONCLUSION

MMG-st may serve as a surgical adjunct indicating axonal integrity in chronic entrapment neuropathies which may aid in clinical decision-making and prognostication of functional outcomes.

Characteristics of Carpal Tunnel Syndrome in Wild-Type Transthyretin Amyloidosis

BACKGROUND

Carpal tunnel syndrome (CTS) is one of the most common extra-cardiac manifestations of wild-type transthyretin amyloidosis (wtATTR); however, the characteristics of CTS in this population remain poorly understood.

METHODS

This retrospective cohort study reports findings from a single-centre experience of comprehensive neurological screening at the time of wtATTR diagnosis by nerve conduction studies (NCS) and neurologist assessment.

RESULTS

Seventy-nine patients underwent neurological screening, 73 (92%) males, mean age 79.2 ± 7.5 years. Seventy-four (94%) had electrodiagnostic findings of median neuropathy at the wrist (MNW), 37 (50%) of which had a prior diagnosis of CTS and 37 (50%) had a new diagnosis of MNW. Over half of wtATTR patients (42, 53%) had bilateral MNW on screening. Most with pre-existing CTS had bilateral disease (28, 76%) and underwent bilateral carpal tunnel release (CTR) (23, 62%) prior to screening. Twenty-one (19%) wrists had mild MNW, 43 (38%) moderate and 49 (43%) severe. Twenty-one (28%) wtATTR patients with MNW were asymptomatic, 10 of which (48%) had moderate disease. Nineteen (36%) wtATTR patients with symptomatic MNW had recurrent disease despite previous CTR. As a result of screening, 36 (68%) patients with symptomatic MNW were referred for CTR.

CONCLUSIONS

MNW is exceptionally common at the time of wtATTR diagnosis, affecting 94% of our patients. Most had severe, bilateral MNW on NCS. Some were asymptomatic, despite having moderate disease. The rate of recurrence following CTR was observed to be higher in wtATTR patients than the general population.

Persistent Pain as an Early Indicator for Operative Carpal Tunnel Revision after Primary Release: A Retrospective Analysis of Recurrent and Persistent Carpal Tunnel Syndrome

BACKGROUND

Prolonged symptoms of carpal tunnel syndrome (CTS) after primary carpal tunnel release (CTR) can reduce the quality of life and lead to multiple referrals across specialties. The following study aimed to identify differences in symptoms, signs, and intraoperative findings between recurrent and persistent CTS cases to avoid undesired outcomes after primary CTR.

METHODS

A retrospective analysis was conducted on revision CTRs performed between 2005 and 2015 using literature-based definitions for recurrent (a relapse of symptoms occurs following a symptom-free period of ≥3 months) and persistent (symptoms persisting longer than three months after surgical release) CTS. The parameters assessed were symptoms, clinical signs, and intraoperative findings.

RESULTS

Out of 53 cases, 85% (n = 45) were external referrals, whereby our own revision rate was 0.67% (n = 8/1199). Paresthesia and numbness were frequent in both groups; however, abnormal postoperative pain was reported more often in persistent cases (86%; n = 30/35) in comparison to recurrent cases (50%; n = 9/18; p = 0.009). Scarring around the median nerve was observed in almost all recurrent cases (94%; n = 17/18) and in 40% (n = 14/35) of persistent cases (p < 0.001). Incomplete division of the palmar ligament was the primary cause for revision in the persistent cohort (49%; n = 17/35).

CONCLUSIONS

For patients experiencing symptoms for more than three months after CTR, primarily presenting as pain, it is advisable to consider referring the patient to a certified hand clinic for additional evaluation.

Magnetic resonance imaging as a first-choice imaging modality in carpal tunnel syndrome: new evidence

BACKGROUND

Carpal tunnel syndrome (CTS) is the most common type of peripheral nerve compression. Magnetic resonance imaging (MRI) is becoming more popular in practice in the evaluation of CTS.

PURPOSE

To evaluate the diagnostic value of MRI in CTS.

MATERIAL AND METHODS

A cross-sectional study of 39 wrists was conducted. Clinical and nerve conduction study findings were evaluated and graded according to the Boston Carpal Tunnel Questionnaire (BCTQ) and the American Association of Neuromuscular and Electrodiagnostic Medicine. MRI was performed using a 1.5-T scanner. MRI parameters included cross-sectional area (CSA) of the median nerve and the ratio change in CSA at four levels: distal radioulnar joint (DRUJ-CSA); pisiform (p-CSA); middle of the carpal tunnel (i-CSA); and hook of hamate. The ratio change in CSA was expressed as p-CSA/DRUJ-CSA and ΔCSA (difference between iCSA and DRUJ-CSA), the flattening ratio of the median nerve, the thickness of the flexor retinaculum, flexor retinaculum bowing ratio, signal intensity ratio of the median, nerve and hypothenar muscle signal intensity.

RESULTS

With a cutoff point of 10.9 mm² of the p-CSA, MRI had a sensitivity and specificity of 97.4% and 80% for diagnosis of CTS, respectively. There was a significant association between the clinical and electrophysiological stage with MRI findings (P < 0.001). There was a positive correlation between the BCTQ score and MRI parameters (0.5 < r < 0.7, P < 0.01).

CONCLUSION

MRI has good diagnostic value in evaluating CTS. We recommend using p-CSA ≥10.9 mm² and ΔCSA ≥2.3 mm² as MRI diagnostic criteria of CTS.

Amyloidosis and Carpal Tunnel Syndrome: Surgical Technique for Extended Carpal Tunnel Release with Tenosynovium and Transverse Carpal Ligament Biopsies

Carpal tunnel syndrome (CTS) is common in patients with transthyretin amyloidosis (ATTR), and many experience residual symptoms and/or develop recurrent disease following routine carpal tunnel release (CTR). An extended CTR with median nerve neurolysis is recommended for thorough nerve decompression. Tissue confirmation of amyloidosis can be performed at the time of CTR with biopsies of the transverse carpal ligament and/or tenosynovium.

METHODS

We describe a retrospective, single-center experience performing an extended CTR technique including unilateral and bilateral cases for 13 consecutive patients (18 wrists) with ATTR and symptomatic median neuropathy at the wrist.

RESULTS

The mean patient age was 83 (range 67-90) years and 11 (85%) were men. Notable intraoperative findings in all cases included thickened tenosynovium and median nerve epineurium, and adherence of the median nerve to the deep surface of transverse carpal ligament. Pathology findings were positive for amyloidosis from both the transverse carpal ligament and the tenosynovium biopsies in all patients.

CONCLUSIONS

Extended CTR with simultaneous wrist tissue biopsy can be safely performed for ATTR patients with CTS. Characteristic intraoperative findings should increase clinical suspicion for undiagnosed ATTR and prompt performance of biopsy for diagnostic confirmation. Volar wrist tenosynovial biopsy is our preferred tissue for confirmation of ATTR, for patients with and without CTS, given its safety profile and 100% pathological yield in our series.

The Impact of Perceived Upper Extremity Severity and Prior Surgery on Patient-Reported Outcomes

Background: The recently validated Hand Questionnaire (HAND-Q) is a multifaceted patient-reported outcome measure (PROM) for hand/upper extremity (UE) pathology and treatment. Here, we conduct a pilot study utilising data collected as a participating site for the Phase II HAND-Q Pilot Multicenter International Validation Study. We hypothesised that self-reported hand functionality, symptom/disease severity, hand appearance, emotional dissatisfaction and treatment satisfaction would be worse in patients who perceived their disease severity to be more severe but would not differ between patients based on prior surgical history. Methods: Patients were prospectively enrolled for HAND-Q participation from September 2018 to August 2019. Patients were included in this analysis if they responded to the following scales of HAND-Q: Hand Functionality Satisfaction, Symptom Severity, Hand Appearance Satisfaction, Emotional Dissatisfaction and Treatment Satisfaction. Composite scores (CS) were created for each section. Surgical versus non-surgical CS and mild versus moderate/severe CS were compared with t-tests. Bi-variate comparisons of responses were performed between surgical and non-surgical groups, and between mild and moderate/severe groups. Results: HAND-Q individual question analysis revealed significant differences in functionality and symptom severity for patients with prior surgery (p < 0.047). CS analysis confirmed greater overall impairment in surgical patients, but no overall impact on symptom severity. Regarding disease severity HAND-Q individual question analysis, moderate/severe patients reported worse outcomes for specific aesthetic qualities and symptoms for almost all items (p < 0.05). CS analysis revealed significantly worse overall hand appearance satisfaction, hand functionality, emotional satisfaction and symptom severity for patients with moderate/severe hand conditions. Conclusions: HAND-Q revealed worsened outcomes for UE patients with self-reported moderate/severe conditions or previous surgical history. Understanding how previous surgery and disease severity may impact clinical outcomes is important for crafting appropriate treatment. Level of Evidence: Level II (Prognostic Study).

Patient-Centred Outcomes Following Open Carpal Tunnel Release: A Systematic Review of the Current Literature

Background: Patients’ individual interpretations of their own health outcomes are becoming increasingly important metrics in defining clinical success across all specialties, especially in hand surgery. However, there is a relative paucity of data using validated health-related quality of life (HR-QoL) assessments for carpal tunnel release (CTR). The purpose of this study was to review published outcomes on traditional open CTR to formally assess the current need for more accurate, validated assessment tools to evaluate CTR-specific HR-QoL.

Methods: PubMed, MEDLINE and Cochrane Library databases were queried according to PRISMA guidelines for all studies investigating patient-reported outcomes following traditional open CTR. Analysis focused on HR-QoL, symptomatic relief, functional status, overall satisfaction and return to work or activities of daily living (ADLs).

Results: In total, 588 unique articles were screened, and 30 studies met selection criteria. HR-QoL was formally assessed in only 3 studies using the validated 36-Item Short Form Survey. Symptomatic relief was measured in 29 (97%) studies, making it the most frequently reported item, whereas functional ability was reported by 19 (63%) studies. The Boston Carpal Tunnel Questionnaire was the most frequently utilised tool to assess symptomatic relief (13/30) and functional improvement (11/30). Using unvalidated custom surveys, 14 studies (47%) reported patient satisfaction and 12 studies (40%) documented time to return to work/ADLs.

Conclusion: There is a dearth of studies utilising HR-QoL assessment tools to evaluate outcomes following traditional open CTR. The creation and validation of new CTR-specific HR-QoL tools accounting for both physical and psychological health is warranted.

Level of Evidence: Level II (Therapeutic)

Quantitative parameters of diffusion tensor imaging in the evaluation of carpal tunnel syndrome

BACKGROUND

To explore the value of diffusion tensor imaging (DTI)-derived metrics in quantitative evaluation of carpal tunnel syndrome (CTS).

METHODS

This prospective cross-sectional study included 39 wrists from 24 symptomatic CTS patients, who underwent clinical, electrophysiological, and magnetic resonance imaging (MRI) evaluations. In addition, 10 wrists of 6 healthy participants were included as controls. Clinical and nerve conduction study (NCS) findings were evaluated and graded according to the Boston Carpal Tunnel Questionnaire (BCTQ) and the American Association of Neuromuscular and Electrodiagnostic Medicine (AANEM), respectively. We performed MRI using a 1.5 Tesla scanner. Mean diffusivity (MD), fractional anisotropy (FA), axial diffusivity (AD), and radial diffusivity (RD) of the median nerve at the distal radioulnar joint (DRUJ) (d), the inlet of the carpal tunnel (CT) at the pisiform level (i), the middle of the CT (m) and the outlet of the CT at the level of the hook of hamate (o), cross-sectional area at the inlet of the CT (iCSA), and the difference between MD and FA of the DRUJ and the outlet of CT (Delta MD and Delta FA) were measured.

RESULTS

The CTS patients had significantly lower FA [for example, oFA: mean difference 0.09, 95% confidence interval (CI): 0.05 to 0.12] and significantly higher MD than healthy participants (for example, iMD: mean difference 0.3, 95% CI: 0.03 to 0.57). There was a negative correlation between iCSA with iFA and between mFA and oFA (-0.5

CONCLUSIONS

The DTI-derived quantitative metrics add potential value to the evaluation of CTS. Alterations in the FA of the median nerve along the CT are the most significant features of CTS and reflect the degree of median nerve compression and clinical deficit. With a cutoff value of 0.45, FA at the carpal outlet has a sensitivity and specificity of 87.5% and 85.7% in the diagnosis of CTS, respectively.

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Key Words

• Boston Carpal Tunnel Questionnaire
• Carpal tunnel syndrome (CTS)
• apparent diffusion coefficient (ADC)
• diffusion tensor imaging (DTI)
• fraction anisotropy
• magnetic resonance imaging (MRI)
• nerve conduction study (NCS)

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Affiliation(s)

Nhu Quynh Vo Department of Radiology, University of Medicine and Pharmacy, Hue University, Hue, Vietnam
Ngoc Thanh Hoang Department of Radiology, University of Medicine and Pharmacy, Hue University, Hue, Vietnam
Duy Duan Nguyen Department of Internal Medicine, University of Medicine and Pharmacy, Hue University, Hue, Vietnam
Thi Hieu Dung Nguyen Department of Physiology, University of Medicine and Pharmacy, Hue University, Hue, Vietnam
Trong Binh Le Department of Radiology, University of Medicine and Pharmacy, Hue University, Hue, Vietnam
Nghi Thanh Nhan Le Department of Surgery, University of Medicine and Pharmacy, Hue University, Hue, Vietnam
Thanh Thao Nguyen Department of Radiology, University of Medicine and Pharmacy, Hue University, Hue, Vietnam

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Evaluation of Patient Expectations before Carpal Tunnel Release

Background:

Carpal tunnel release (CTR) is common, yet patient treatment expectations remain unclear. The primary purpose was to describe patient expectations before CTR. Secondarily, we aimed to identify factors influencing expectations.

Methods:

Included patients underwent unilateral or bilateral CTR between 2015 and 2017 at a single academic center. Expectations regarding the level of relief/improvement were queried. Area deprivation index (ADI) was used to measure social deprivation. Univariate and multivariable logistic regression identified factors associated with expecting great relief/improvement.

Results:

Of 307 included patients, mean age was 54 ± 16 years and 63% were women. Patients most commonly expected great (58%) or some (23%) relief/improvement. Few patients expected little (3%) or no (4%) relief/improvement, and 13% had no expectations. In the multivariable analysis, male sex, lower social deprivation, and lower BMI were associated with expecting great relief/improvement. Age, surgical technique (open versus endoscopic), use of the operating room versus procedure room, and preoperative factors (constant numbness, weakness/atrophy, duration of symptoms, and QuickDASH) were not associated with expectations.

Conclusions:

Most patients expect some to great improvement after CTR. This was independent of several factors with a known association with worse outcomes (advanced age, atrophy/weakness, and constant numbness). Male sex was associated with the expectation of great improvement, in which superior outcomes relative to females have not been borne out in the literature. These findings highlight patient counseling opportunities. The observed association between social deprivation and expectations warrants further investigation, as the socioeconomically disadvantaged experience worse healthcare outcomes in general.

Influential factors of surgical decompression for ulnar nerve neuropathy in Guyon's canal

BACKGROUND

Guyon's canal syndrome is nerve compressive pathology which can lead to sensory and/or motor function deficits. This problem is usually difficult to distinguish from cubital tunnel syndrome and relatively less common than cubital tunnel syndrome. This study evaluated the functional results and patient-reported outcomes following decompression of the ulnar nerve in Guyon's canal.

METHODS

Patients who were diagnosed with Guyon's canal syndrome confirmed by electrodiagnostic studies and underwent nerve decompression surgery were included in this study. The functional improvement by examining the Froment's sign, Wartenberg's sign, static two-point discrimination, and Semmes Weinstein monofilament examination as physical examination scores was evaluated. The visual analogue scale of satisfaction and the disabilities of the arm, shoulder, and hand questionnaire were used for the postoperative patient-reported outcome evaluation.

RESULTS

From 2003 to 2019, 38 cases had been enrolled with a mean age of 53 years, ranging from 19 to 85 years. There were seven patients with comorbidity of diabetes mellitus and 28 patients who received additional neurolysis combined with the Guyon's release procedure. There were 19 patients with a good response to surgery and 10 patients with a poor surgical outcome due to persistent paresthesia or weakness. After statistical analysis, it was revealed that several influential factors could have been related to a compromised functional outcome, including a symptom duration of more than 3 months, combination with additional neurolysis of ipsilateral extremity, and/or comorbidity with diabetes mellitus.

CONCLUSION

It was concluded that promising functional outcomes after surgical release of ulnar neuropathy in Guyon's canal could be achieved if the patients did not need additional neurolysis or the symptom duration was within 3 months.

Evidence-Based Approach to Timing of Nerve Surgery: A Review

ABSTRACT

Events causing acute stress to the health care system, such as the COVID-19 pandemic, place clinical decisions under increased scrutiny. The priority and timing of surgical procedures are critically evaluated under these conditions, yet the optimal timing of procedures is a key consideration in any clinical setting. There is currently no single article consolidating a large body of current evidence on timing of nerve surgery. MEDLINE and EMBASE databases were systematically reviewed for clinical data on nerve repair and reconstruction to define the current understanding of timing and other factors affecting outcomes. Special attention was given to sensory, mixed/motor, nerve compression syndromes, and nerve pain. The data presented in this review may assist surgeons in making sound, evidence-based clinical decisions regarding timing of nerve surgery.

Surgical Timing for Carpal Tunnel Syndrome: A Comparison of Health Care Delivery in the Veterans Administration and Private Sector

PURPOSE

The U.S. Department of Veterans Affairs (VA) health care system monitors time from referral to specialist visit. We compared wait times for carpal tunnel release (CTR) at a VA hospital and its academic affiliate.

METHODS

We selected patients who underwent CTR at a VA hospital and its academic affiliate (AA) (2010-2015). We analyzed time from primary care physician (PCP) referral to CTR, which was subdivided into PCP referral to surgical consultation and surgical consultation to CTR. Electrodiagnostic testing (EDS) was categorized in relation to surgical consultation (prereferral vs postreferral). Multivariable Cox proportional hazard models were used to examine associations between clinical variables and surgical location.

RESULTS

Between 2010 and 2015, VA patients had a shorter median time from PCP referral to CTR (VA: 168 days; AA: 410 days), shorter time from PCP referral to surgical consultation (VA: 43 days; AA: 191 days), but longer time from surgical consultation to CTR (VA: 98 days; AA: 55 days). Using multivariable models, the VA was associated with a 35% shorter time to CTR (AA hazard ratio [HR], 0.65; 95% confidence interval [CI], 0.52-0.82) and 75% shorter time to surgical consultation (AA HR, 0.25; 95% CI, 0.20-0.03). Receiving both prereferral and postreferral EDS was associated with almost a 2-fold prolonged time to CTR (AA HR, 0.49; 95% CI, 0.36-0.67).

CONCLUSIONS

The VA was associated with shorter overall time to CTR compared with its AA. However, the VA policy of prioritizing time from referral to surgical consultation may not optimally incentivize time to surgery. Repeat EDS was associated with longer wait times in both systems.

CLINICAL RELEVANCE

Given differences in where delays occur in each health care system, initiatives to improve efficiency will require targeting the appropriate sources of preoperative delay. Judicious use of EDS may be one avenue to decrease wait times in both systems.

Carpal Tunnel Syndrome in Transthyretin Cardiac Amyloidosis: Implications and Protocol for Diagnosis and Treatment

Amyloidosis is a group of disorders that occurs due to the aggregation of insoluble and misfolded proteins in the extracellular space, eventually resulting in organ dysfunction. Type II amyloidosis is caused by the deposition of transthyretin (TTR), which will be the main focus of this article. Deposition of TTR in the myocardium results in a restrictive form of cardiomyopathy. TTR can also deposit in the flexor tenosynovium resulting in carpal tunnel syndrome (CTS). CTS develops five to ten years prior to cardiac amyloidosis (CA), and therefore, the temporal relationship allows CTS to be a diagnostic indicator for CA. This report discusses a 65-year-old female and a 76-year-old male, both presenting with pain and paresthesia in the distribution of the median nerve in the left and right wrist. In each case, the diagnosis of bilateral CTS was supported by a positive Phalen’s maneuver and Tinel’s sign. Subsequent tenosynovial and transverse carpal ligament biopsies were performed with Congo red stain revealing amyloid deposits of TTR monomers. This prompted the investigation into possible cardiac involvement. Following cardiac evaluation, the diagnosis of CA was established for the deposition of TTR amyloid monomers. CA has gained much attention in the medical community due to the improvements in cardiac imaging, therapeutic interventions, and diagnostic indicators. Medical professionals should be urged to have a high level of clinical suspicion and refer patients with CTS and select risk factors for cardiac evaluation.

Utility of Neuropathy Screening for Wild-Type Transthyretin Amyloidosis Patients

BACKGROUND

Wild-type transthyretin amyloidosis (wtATTR) is an important cause of heart failure (HF); however, the prevalence and clinical significance of neurologic complications remains uncertain.

METHODS

This analysis reports findings from a single-centre experience of routine neuropathy screening at the time of wtATTR diagnosis by nerve conduction studies and neurologist assessment, compared with age-matched controls.

RESULTS

Forty-one wtATTR patients were included, 39 (95%) males, mean age 78.4 ± 7.7 years, 22 (54%) New York Heart Association (NYHA) class III-IV HF, along with 15 age-matched controls (mean age 77.1 ± 4.2 years, 80% male). Twenty-one (51%) wtATTR patients were diagnosed with polyneuropathy, 15 (37%) with spinal stenosis, 36 (88%) with carpal tunnel syndrome (CTS) and 14 (34%) with ulnar neuropathy. Comparison diagnoses among controls were 1 (7%), 0, 1 (7%) and 3 (20%), respectively. Among patients with NYHA class III-IV HF, 16 (73%) had polyneuropathy compared with 5 (26%) with class I-II (p < 0.01), odds ratio of 7.5 (95% confidence interval 1.9-29.9). After neuropathy screening, 19 (46%) patients were offered neurologic therapy and/or additional diagnostic evaluation. This included CTS release surgery (16, 39%), neuropathic pain medication (3, 7%), nerve block (1, 2%), wrist splinting (2, 5%) and foot care (1, 2%). Spine imaging was performed for 3 (7%) patients, and deltoid muscle and sural nerve biopsy for 1 (2%) patient.

CONCLUSIONS

Screening of wtATTR patients for neurologic complications resulted in a management change for nearly half. CTS, polyneuropathy and ulnar neuropathy were common. This approach warrants consideration as part of routine assessment for newly diagnosed wtATTR patients.