Ultrasonographic median nerve changes under tendon gliding exercise in patients with carpal tunnel syndrome and healthy controls

Current and future utility of ultrasound imaging in upper extremity musculoskeletal rehabilitation: A scoping review

STUDY DESIGN

This study was a scoping review.

BACKGROUND

Continued advances in musculoskeletal sonography technology and access have increased the feasibility of point-of-care use to support day-to-day clinical care and decision-making. Sonography can help improve therapeutic outcomes in upper extremity (UE) rehabilitation by enabling clinicians to visualize underlying structures during treatment.

PURPOSE OF THE STUDY

This study aimed to (1) evaluate the growth, range, extent, and composition of sonography literature supporting UE rehabilitation; (2) identify trends, gaps, and opportunities with regard to anatomic areas and diagnoses examined and ultrasound techniques used; and (3) evaluate potential research and practice utility.

METHODS

Searches were completed in PubMed, CINAHL, SPORTDiscus, PsycINFO, and BIOSIS. We included data-driven articles using ultrasound imaging for upper extremity structures in rehabilitation-related conditions. Articles directly applicable to UE rehabilitation were labeled direct articles, while those requiring translation were labeled indirect articles. Articles were further categorized by ultrasound imaging purpose. Article content between the two groups was descriptively compared, and direct articles underwent an evaluation of evidence levels and narrative synthesis to explore potential clinical utility.

RESULTS

Average publication rates for the final included articles (n = 337) steadily increased. Indirect articles (n = 288) used sonography to explore condition etiology, assess measurement properties, inform medical procedure choice, and grade condition severity. Direct articles (n = 49) used sonography to assess outcomes, inform clinical reasoning, and aid intervention delivery. Acute UE conditions and emerging sonography technology were rarely examined, while tendon, muscle, and soft tissue conditions and grayscale imaging were common. Rheumatic and peripheral nerve conditions and Doppler imaging were more prevalent in indirect than direct articles. Among reported sonography service providers, there was a high proportion of nonradiologist clinicians.

CONCLUSION

Sonography literature for UE rehabilitation demonstrates potential utility in evaluating outcomes, informing clinical reasoning, and assisting intervention delivery. A large peripheral knowledge base provides opportunities for clinical applications; however, further research is needed to determine clinical efficacy and impact for specific applications.

The effects of virtual reality-mediated tendon and nerve gliding exercises in the conservative management of carpal tunnel syndrome: a double-blind randomized placebo controlled trial

BACKGROUND

Carpal tunnel syndrome (CTS) is a common condition resulting from compression of the median nerve at the wrist. First-line treatment typically involves conservative management, which commonly includes splinting and gliding exercises. Emerging evidence suggests the potential benefits of using virtual reality (VR) in rehabilitation.

AIM

This study aimed to assess the effects of VR-mediated tendon and nerve gliding exercises on the conservative treatment of CTS, compared to video-assisted (sham virtual) and home-based gliding exercises.

DESIGN

This study was a prospective, double-blind, randomized, placebo controlled interventional trial.

SETTING

The study was conducted in the Department of Physical Medicine and Rehabilitation at a university hospital.

POPULATION

The study included patients with mild to moderate CTS.

METHODS

The study included a total of 54 hands from 33 patients. The participants were randomly allocated into three groups: the VR-mediated group (VG), the sham VR-mediated group (SG), and the control (home-based) group (CG). Both intervention groups engaged in gliding exercises utilizing a Leap Motion Controller-based VR system and instructional videos, under the supervision of a physical therapist. The VR system was activated for the VG and deactivated for the SG. Exercises were performed twice weekly for eight weeks. The CG received a brochure describing the gliding exercises. Primary outcomes were symptom severity measured by the Numerical Rating Scale (NRS) and the Boston Carpal Tunnel Questionnaire (BCTQ), along with nerve conduction studies. Secondary outcomes included muscle strength (hand grip, key pinch), sensory measures (static two-point discrimination, vibration), and quality of life.

RESULTS

Both the VG and SG showed significant improvements in NRS and BCTQ scores compared to the CG in within-group comparisons. Nighttime symptoms improved significantly in the VG compared to the CG in between-group analyses. Electrophysiological findings showed no significant changes.

CONCLUSIONS

An eight-week VR-mediated exercise program may enhance tendon and nerve gliding exercise effectiveness, particularly for nighttime symptoms in CTS patients.

CLINICAL REHABILITATION IMPACT

In the future, challenging exercises requiring time and supervision could be effectively performed through VR, offering an alternative to traditional methods.

Effects of high-intensity laser therapy on pain, functional status, hand grip strength, and median nerve cross-sectional area by ultrasonography in patients with carpal tunnel syndrome

The aim of this study was to evaluate the effects of high intensity laser therapy (HILT) on pain, functional status, hand grip strength, and median nerve cross-sectional area by ultrasonography in patients with carpal tunnel syndrome. Sixty patients who were diagnosed with carpal tunnel syndrome were included in the study. The patients observed during the research were randomly divided into two groups with 30 patients in each group. Splint+ exercise and HILT (pulsed mode with a power of 8.0 W and energy density of 8 J/cm2 for 1.40 minutes for every 25 cm2, continuous mode with a power of 3.0 W and energy density of 80 J/cm2 for 11 minutes for each 25 cm2; total 10 sessions 5 days a week) were applied for 2 weeks for the first group, and splint+exercise and sham laser treatment were applied for 2 weeks for the second group. Randomization was undertaken with the assistance of a computer-generated random number table before beginning the treatment processes. The patients were evaluated with the determined scales before the treatment, at the end of the treatment, and at the 3rd month. Hydraulic hand dynamometer was used to measure hand grip strength, visual analog scale (VAS) for pain, Boston CTS Questionnaire to assess function, and ultrasonography to measure median nerve cross-sectional area. The impact of time on the change in VAS levels was found to be of statistical significance within each group of patients (p<0.001), but between-group comparisons did not yield significant results (p<0.454). The effects of time on variations in Boston CTS Questionnaire scores were found to have been of statistical significance for both groups (p<0.001), but significance was not subsequently observed when the results of the two groups were compared on a between-group basis (p=0.226 and p=0.973 for the FSS and SSS, respectively). While time had a statistically significant effect on the change in hand grip strength for both groups (p=0.000), between-group comparisons statistical significance finding in favor of HILT was found in the early period (p=0.012). The time-group association patterns of the groups showed significant difference (p=0.025). While time had a statistically significant effect on the changes in the median cross-sectional areas of the nerve for the patients of both treatment groups (p<0.001), between-group comparisons yielded no findings of statistical significance (p=0.438). The time-group relationship patterns of the groups were found to reflect statistical significance (p=0.001). In conclusion, the results of the research presented here have confirmed that hand grip strength may increase and the median nerve's cross-sectional area may decrease upon the application of high-intensity laser for individuals experiencing CTS. However, this effect was demonstrated here only in the short-term and the evidence was not maintained through the course of follow-up of a longer duration.

Sonographic reference values for median nerve cross-sectional area: A meta-analysis of data from healthy individuals

Objective

Establish median nerve CSA reference values and identify patient-level factors impacting diagnostic thresholds.

Methods

Studies were identified through a robust search of multiple databases, and quality assessment was conducted using a modified version of the National Institute of Health Study Quality Assessment Tool for Observational Cohort and Cross-Sectional Studies. A meta-analysis was performed to identify normative values stratified by anatomic location. A meta-regression was conducted to examine heterogeneity effects of age, sex, and laterality.

Results

The meta-analysis included 73 studies; 41 (56.2%) were high quality. The median nerve CSA [95% CI] was 6.46mm2 [6.09-6.84], 8.68mm2 [8.22-9.13], and 8.60mm2 [8.23-8.97] at the proximal forearm, the carpal tunnel inlet, and the proximal carpal tunnel, respectively. Age was positively associated with CSA at the level of proximal carpal tunnel (β=0.03mm2, p=0.047). Men (9.42mm2, [8.06-10.78]) had statistically larger proximal tunnel CSA (p = 0.03) as compared to women (7.71mm2, [7.01-8.42]). No difference was noted in laterality.

Conclusion

A reference value for median nerve CSA in the carpal tunnel is 8.60mm2. Adjustments may be required in pediatrics or older adults. The diagnostic threshold of 10.0mm2 for male patients should be cautiously applied as the upper limit of normative averages surpasses this threshold.

The cross-sectional morphology of median nerve in carpal tunnel of healthy, adult population: A systematic review and meta-analysis

The cross-section area is a crucial parameter to assess peripheral neuropathy. The ultrasonographic evaluation of cross-section area of median nerve is a low-cost and readily available tool for diagnosis and assessment. However, the intra-nerve dimensional variability and its normative reference value in a healthy subject are missing. The current meta-analysis aims to capture the median nerve cross-section area for healthy subjects and generate a comprehensive ultrasonographic reference data set for each population.

METHODS

The full text of manuscripts were collected after short-listing the abstracts collected from search strategy. A quality assurance tool was used to capture the risk of bias of each study after reviewing the included manuscripts. The pooled estimate of cross-section area was stratified according to anatomical landmarks, sex, and ancestry.

RESULTS

A total of 97 observational studies dealt with 6679 wrists of healthy subjects were included. The pooled estimate of the cross-section area of median nerve at carpal tunnel inlet was 8.54mm² [95% CI: 8.34-8.74mm²]. The same pooled estimate at carpal tunnel outlet was 8.03mm² [95% CI: 7.46-8.60mm²]. Both these pooled estimates have significant correlation with mean age of population. Age and sex were two primary predictors of the cross-section of median nerve. The flattening ratio, circularity, and wrist-forearm ratio of median nerve were also computed.

CONCLUSION

These normative data could serve as a reference for assessing median nerve pathologies, including carpal tunnel syndrome. The ethnic variation of pooled estimate and heterogeneity will guide clinician set up the reference value for diagnostic criteria.

A systematic review: normative reference values of the median nerve cross-sectional area using ultrasonography in healthy individuals

Median nerve cross-sectional area (CSA) was used for screening and diagnosis of neuropathy, but few studies have suggested reference range. Hence, this systematic review was performed to evaluate a normative values of median nerve CSA at various landmarks of upper limb based on ultrasonography. PubMed and Web of science were used to search relevant articles from 2000 to 2020. Forty-one eligible articles (2504 nerves) were included to access median nerve CSA at different landmarks (mid-arm, elbow, mid-forearm, carpal tunnel (CT) inlet and CT outlet). Data was also stratified based on age, sex, ethnicity, geographical location, and method of measurement. Random effects model was used to calculate pooled weighted mean (95% confidence interval (CI), [upper bound, lower bound]) at mid-arm, elbow, mid-forearm, CT inlet and outlet which found to be 8.81 mm², CI [8.10, 9.52]; 8.57 mm² [8.00, 9.14]; 7.07 mm² [6.41, 7.73]; 8.74 mm² [8.45, 9.03] and 9.02 mm² [8.08, 9.95] respectively. Median nerve CSA varies with age, geographical location, and sex at all landmarks. A low (I² < 25%) to considerable heterogeneity (I² > 75%) was observed, indicating the variation among the included studies. These findings show that median nerve CSA is varying not only along its course but also in other sub-variables.

Influence of temperature on sonographic images of the median nerve for the diagnosis of carpal tunnel syndrome: a case control study

Background

In addition to nerve conduction studies (NCSs), ultrasonography has been widely used as an alternative tool for diagnosing carpal tunnel syndrome (CTS). Although the results of NCSs are influenced by local skin temperature, few studies have explored the effects of skin temperature on ultrasonography of the median nerve. Since swelling and intraneural blood flow of the median nerve might be influenced by local temperature changes, the aim of this study was to evaluate the cross-sectional area (CSA) and intraneural blood flow of the median nerve under three skin temperatures (30 °C, 32 °C, 34 °C).

Methods

Fifty patients with CTS and 50 healthy volunteers were consecutively recruited from a community hospital. Each participant received physical examinations and NCSs and underwent ultrasonography, including power Doppler, to evaluate intraneural vascularity.

Results

The CSA of the median nerve in the CTS patients was significantly larger than that in the healthy controls at all three temperatures. However, significant differences in the power Doppler signals of the median nerve between the two studied groups were observed only at 30 and 32 °C, not at 34 °C.

Conclusion

The significant difference in the intraneural vascularity of the median nerve between the patients with CTS and the healthy subjects was lost at higher temperatures (34 °C). Therefore, the results of power Doppler ultrasonography in diagnosing CTS should be cautiously interpreted in patients with a high skin temperature or those who reside in warm environments.

Practice patterns in the conservative treatment of carpal tunnel syndrome: Survey results from members of the American Society of Hand Therapy

STUDY DESIGN

A cross-sectional descriptive design was used.

INTRODUCTION

Carpal tunnel syndrome (CTS) is a complex combination of symptoms resulting from compression of the median nerve within the carpal tunnel. A study that compares the conservative interventions identified in the literature with the actual conservative interventions being implemented by therapists for the treatment of CTS is not presently available.

PURPOSE OF THE STUDY

The purpose of this study was to examine conservative interventions for CTS as reported by certified hand therapists (CHTs) within various clinical settings. The study also aimed to identify the decision-making process for the selection of CTS interventions.

METHOD

CHT members of the American Society of Hand Therapists were surveyed electronically to obtain quantitative data.

RESULTS

Patient education, nocturnal orthosis, and ergonomic modifications ranked among the top conservative interventions utilized for CTS, whereas treatments such as magnet therapy, C-TRAC, and heating lamps ranked among the least utilized interventions. When selecting interventions, clinical expertise, research evidence, and patient preferences were all highly valued considerations for CHT.

DISCUSSION

Our study offers a unique summary of CHT practice patterns for CTS interventions and the associated decision-making processes. It compares findings with existing literature on this topic, offering researchers and clinicians a glimpse of the CTS practice trends.

CONCLUSION

This study may serve to prioritize future research studies based on the prevalence of intervention usage among the experts. It also serves as a guide to those seeking to understand the most common interventions utilized for conservative CTS treatment.

Is there a relationship between impaired median nerve excursion and carpal tunnel syndrome? A systematic review

STUDY DESIGN

Systematic review.

INTRODUCTION

It is accepted that the etiology of carpal tunnel syndrome (CTS) is multifactorial. One of the most commonly accepted etiologic factors for CTS is compromise of the kinematic behavior and excursion of the median nerve.

PURPOSE OF THE STUDY

The objective of this systematic review was to establish if there is a relationship between impaired median nerve excursion and CTS.

METHODS

A systematic review, following the Preferred Reporting Items for Systematic Reviews and Meta-analyses guidelines, was conducted. Studies were sought where in vivo median nerve excursion was compared between people with CTS to an appropriate control group. Quality appraisal for each study was conducted using the Newcastle-Ottawa Scale by 2 independent evaluators.

RESULTS

Ten case-control studies using ultrasound imaging to quantify median nerve excursion were included. All studies were rated as of "moderate" methodologic quality having scored 6 or 7 (of 9 stars) for the Newcastle-Ottawa Scale. Seven of the 10 studies concluded that median nerve excursion was reduced in a CTS population when compared with controls.

CONCLUSION

The literature suggests that median nerve excursion is reduced in people with CTS when compared with healthy controls.

LEVEL OF EVIDENCE

3a.

Efficacy of paraffin wax bath for carpal tunnel syndrome: a randomized comparative study

Carpal tunnel syndrome (CTS) is the most frequently diagnosed neuropathy of upper extremity entrapment neuropathies. We aimed to investigate the effectiveness of paraffin therapy in patients with CTS. Seventy patients diagnosed with mild or moderate CTS were randomly divided into two groups as splint treatment (during the night and day time as much as possible for 3 weeks) alone and splint (during the night and day time as much as possible for 3 weeks) + paraffin treatment (five consecutive days a week for 3 weeks). Clinical and electrophysiological assessments were performed before and 3 weeks after treatment. The patients were assessed by using visual analog scale (VAS) for pain, electroneuromyography (ENMG), and Boston Carpal Tunnel Syndrome Questionnaire (BCTSQ). The significant improvement was found in VAS scores in both groups when compared with pretreatment values (p < 0.05). There was no significant improvement in functional capacity score (p > 0.05), whereas a significant improvement was noted in the BCTQ symptom severity scale score in the splint group (p < 0.05). Significant improvements were demonstrated in both scorers in the combined treatment group. Similarly, significant improvements were found in the combined treatment group in terms of motor and sensory distal latency, sensory amplitude, and median sensory nerve velocity (p < 0.05). There was no significant change in electrophysiologic parameters in the splint group (p > 0.05), and the difference in these parameters between the groups was statistically significant (p < 0.05). In conclusion, using splinting alone in patients with CTS is an effective treatment for reducing symptoms in the early stages. Paraffin treatment with splint increases the recovery in functional and electrophysiological parameters.

Conservative therapeutic management of carpal tunnel syndrome

ABSTRACT Carpal tunnel syndrome is the most prevalent nerve compression and can be clinically or surgically treated. In most cases, the first therapeutic alternative is conservative treatment but there is still much controversy regarding the most effective modality of this treatment. In this study, we critically evaluated the options of conservative treatment for carpal tunnel syndrome, aiming to guide the reader through the conventional options used in this therapy.

Education, night splinting and exercise versus usual care on recovery and conversion to surgery for people awaiting carpal tunnel surgery: a protocol for a randomised controlled trial

INTRODUCTION

Carpal tunnel syndrome (CTS) is a prevalent upper limb condition that results in significant individual and socioeconomic costs. Large patient numbers, long outpatient waiting times and traditional referral pathways in public health systems create delays in accessing treatment for this condition. Alternative care pathways aimed at streamlining access to treatment and reducing the need for surgical intervention warrant further investigation.

METHODS

A randomised, single-blind controlled clinical trial will be conducted. 128 participants aged 18-75 years with CTS will be recruited from the carpal tunnel surgery waitlists of participating public hospitals. Suitable participants will be stratified for severity and randomly allocated to either receive therapy (education, provision of splints and a home exercise programme) or standard care (continuing on the waitlist without hand therapy intervention for the duration of the study). Outcomes will be measured at baseline and after 6 weeks and 6 months. Primary outcomes are conversion to surgery ratio and perceived effect via the Global Rating of Change Scale.Secondary measures include patient satisfaction, and monitoring of symptoms and function using outcome measures including the Boston CTS Questionnaire, Disability of Arm, Shoulder and Hand Questionnaire, Patient-Specific Functional Scale, patient completed diagram of symptoms and Self-reported Leeds Assessment of Neuropathic Symptoms and Signs pain scale.

DISCUSSION

This paper outlines the design and rationale for a randomised controlled trial that aims to assess the efficacy of an alternative care pathway for the management of patients with CTS while on the surgery waitlist. It is anticipated that the outcomes of this study will contribute to improved and expedited management of this common condition in a public hospital setting.

ETHICS AND DISSEMINATION

Ethics approval was granted by the Princess Alexandra Hospital Centres for Health Research (HREC/13/QPAH/434-SSA/13/QPAH/447) and the Medical Research Ethics Committee at the University of Queensland. Results will be disseminated via conferences and peer-reviewed publications.

TRIAL REGISTRATION NUMBER

ACTRN12613001095752.

Efficacy of tendon and nerve gliding exercises for carpal tunnel syndrome: a systematic review of randomized controlled trials

[Purpose] The purpose of this study was to assess the quality of evidence for the efficacy of tendon and nerve gliding exercises in the management of carpal tunnel syndrome. [Subjects and Methods] Four electronic databases were searched to identify randomized controlled trials on the efficacy of tendon and nerve gliding exercises for carpal tunnel syndrome. Quality assessment was conducted using the Cochrane risk of bias tool. [Results] Four trials were identified and included in the review. The results of critical appraisal of quality ranged between low and moderate risk of bias. The available data could only be included as a narrative description. Symptom severity decreased and functional status improved with combined treatment, involving a tendon or nerve gliding exercise group plus conventional treatments, compared with the use of conventional treatments alone. [Conclusion] Evidence from 4 randomized controlled trials suggests that tendon and nerve gliding exercises, when combined with conventional treatments, may have a favorable effect in patients with carpal tunnel syndrome. However, further randomized controlled trials designed to assess the effect of tendon and nerve gliding exercises alone are required to investigate the hypothesis that such exercises alleviate carpal tunnel syndrome, and to confirm and further elucidate the efficacy of standardized physical exercise programs in patients with carpal tunnel syndrome.