Relationship Between Morphological Change of Median Nerve and Clinical Outcome Before and After Open Carpal Tunnel Release: Ultrasonographic 1-Year Follow-up After Operation

Hand ◽  
2020 ◽  
pp. 155894472093736
Author(s):  
Tsuyoshi Tajika ◽  
Takuro Kuboi ◽  
Fumitaka Endo ◽  
Hirotaka Chikuda
Keyword(s):  
Median Nerve ◽  
Morphological Change ◽  
Carpal Tunnel ◽  
Repeated Measures ◽  
Carpal Tunnel Release ◽  
Surgical Decompression ◽  
Rank Test ◽  
Cross Sectional ◽  
Postoperative Changes ◽  
Open Carpal Tunnel Release

Background: The aims of this study were 2-fold: (1) to assess the morphological change of the median nerve in patients with carpal tunnel syndrome (CTS) preoperatively and at 6 and 12 months postoperatively; and (2) to analyze correlation between the changes in ultrasonographic findings and the changes in clinical findings after surgical decompression. Methods: Of the 28 patients with CTS, 34 wrists were treated with open carpal tunnel release. We evaluated them using the Boston questionnaire, Japanese Society for Surgery of the Hand Version of the Quick Disability of the Arm, Shoulder, and Hand questionnaire, nerve conduction study (NCS), and ultrasound preoperatively and at 6 and 12 months postoperatively. We measured the cross-sectional area (CSA) of the median nerve at the level of the proximal inlet of the carpal tunnel (CSAc) and more proximally at the level of the distal radioulnar joint (CSAd). Paired t tests and repeated measures analysis of variance of ranks were used to identify changes over time. The Spearman correlation coefficient by rank test was used for the analysis of the relation between the amount of change of CSA and the patient-rated questionnaire score and NCS findings. Results: Findings for CSAc, CSAd, and NCS and patient-rated outcomes at 6 and 12 months postoperatively were significantly lower than their preoperative values. However, no significant correlation was found between the postoperative changes in CSAc, CSAd, and clinical variables obtained preoperatively and postoperatively. Conclusions: Evaluation of sonographic imaging might not be helpful for assessing clinical conditions in patients with CTS after surgical decompression.

scholarly journals Postoperative diagnostic potentials of median nerve strain and applied pressure measurement after carpal tunnel release

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Yuichi Yoshii ◽  
Wen-lin Tung ◽  
Hiroshi Yuine ◽  
Tomoo Ishii
Keyword(s):  
Median Nerve ◽  
Carpal Tunnel ◽  
Operating Characteristic ◽  
Carpal Tunnel Release ◽  
Applied Pressure ◽  
Strain Ratio ◽  
Cross Sectional ◽  
Receiver Operating Characteristic Curves ◽  
Clinical Recovery ◽  
Open Carpal Tunnel Release

Abstract Bakground The objective of this study is to investigate the prognostic values of median nerve strain and applied pressure measurement for the assessment of clinical recovery after carpal tunnel release. Methods Forty-five wrists, from 45 idiopathic carpal tunnel syndrome patients who treated with open carpal tunnel release, were evaluated by ultrasound. Median nerve strain, pressure applied to the skin, and ratio of pressure-strain were measured at the proximal part of the carpal tunnel. In addition, distal latencies in the motor and sensory nerve conductions studies and cross-sectional area of median nerve were measured. The parameters were compared before and after the open carpal tunnel release. According to patient recovery, the receiver operating characteristic curves were generated to evaluate the prognostic values of the parameters. The areas under the receiver operating characteristic curves were compared among parameters. Results There was a significant increase in the median nerve strain, and significant decreases in the pressure applied to the skin and ratio of pressure-strain after carpal tunnel release (P < 0.01). There were significant decreases in the distal latencies and the cross-sectional area after carpal tunnel release (P < 0.01). The areas under the curves were 0.689, 0.773, 0.811, 0.668, 0.637, and 0.562 for the pressure, strain, pressure-strain ratio, motor latency, sensory latency, and area, respectively. Conclusions The results suggest that elasticity of the median nerve and pressure around the nerve recover quickly after carpal tunnel release. Pressure-strain ratio was the most reliable parameter to reflect clinical recovery. The measurement of strain and applied pressure can be useful indicators to evaluate effectiveness of the carpal tunnel release. Trial registration Registered as NCT04027998 at ClinicalTrials.gov. Retrospectively registered on July 22, 2019.

scholarly journals A Comparison of Changes in Median Nerve Cross-sectional Area Between Endoscopic and Mini-Open Carpal Tunnel Release

2020 ◽  
Vol 2 (2) ◽  
pp. 80-83
Author(s):  
William R. Smith ◽  
David C. Hirsch ◽  
David O. Osei-Hwedieh ◽  
Robert J. Goitz ◽  
John Fowler
Keyword(s):  
Median Nerve ◽  
Carpal Tunnel ◽  
Carpal Tunnel Release ◽  
Cross Sectional Area ◽  
Sectional Area ◽  
Cross Sectional ◽  
Open Carpal Tunnel Release ◽  
Mini Open

scholarly journals Ultrasonography Findings in Severe Carpal Tunnel Syndrome

Hand ◽  
2018 ◽  
Vol 15 (1) ◽  
pp. 64-68
Author(s):  
Gideon Nkrumah ◽  
Alan R. Blackburn ◽  
Robert J. Goitz ◽  
John R. Fowler
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Carpal Tunnel Release ◽  
Nerve Conduction Studies ◽  
Cross Sectional ◽  
Younger Patients ◽  
Tunnel Syndrome ◽  
Sensory Latency ◽  
Pisiform Bone

Background: Increasing severity of carpal tunnel syndrome (CTS), as graded by nerve conduction studies (NCS), has been demonstrated to predict the speed and completeness of recovery after carpal tunnel release (CTR). The purpose of this study is to compare the cross-sectional area (CSA) of the median nerve in patients with severe and nonsevere CTS as defined by NCS. Methods: Ultrasound CSA measurements were taken at the carpal tunnel inlet at the level of the pisiform bone by a hand fellowship–trained orthopedic surgeon. Severe CTS on NCS was defined as no response for the distal motor latency (DML) and/or distal sensory latency (DSL). Results: A total of 274 wrists were enrolled in the study. The median age was 51 years (range: 18-90 years), and 72.6% of wrists were from female patients. CSA of median nerve and age were comparatively the best predictors of severity using a linear regression model and receiver operator curves. Using cutoff of 12 mm2 for severe CTS, the sensitivity and specificity are 37.5% and 81.9%, respectively. Conclusions: Ultrasound can be used to grade severity in younger patients (<65 years) with a CTS-6 score of >12.

The Anatomical Site of Constriction of the Median Nerve in Patients with Severe Idiopathic Carpal Tunnel Syndrome

2006 ◽  
Vol 31 (6) ◽  
pp. 608-610 ◽  
Author(s):  
M. M AL-QATTAN
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Carpal Tunnel Release ◽  
Anatomical Site ◽  
Idiopathic Carpal Tunnel Syndrome ◽  
Tunnel Syndrome ◽  
A Prospective Study ◽  
Open Carpal Tunnel Release ◽  
Radiological Studies

During open carpal tunnel release in patients with severe idiopathic carpal tunnel syndrome, an area of constriction in the substance of the median nerve is frequently noted. In a prospective study of 30 patients, the central point of the constricted part of the nerve was determined intraoperatively and found to be, on average, 2.5 (range 2.2–2.8) cm from the distal wrist crease. This point always corresponded to the location of the hook of the hamate bone. These intraoperative findings were compared with the “narrowest” point of the carpal canal as determined by anatomical and radiological studies in the literature.

ENDOSCOPIC CARPAL TUNNEL RELEASE FOR RECURRENT CARPAL TUNNEL SYNDROME AFTER PREVIOUS OPEN RELEASE

Hand Surgery ◽  
2004 ◽  
Vol 09 (02) ◽  
pp. 235-239 ◽  
Author(s):  
Lam Chuan Teoh ◽  
Puay Ling Tan
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Carpal Tunnel Release ◽  
Open Release ◽  
Endoscopic Carpal Tunnel Release ◽  
Endoscopic Release ◽  
Tunnel Syndrome ◽  
Open Carpal Tunnel Release ◽  
Surgical Release

Recurrent carpal tunnel syndrome from various causes has been shown to occur in up to 19% of patients. Endoscopic carpal tunnel release has been used to decompress the median nerve in carpal tunnel syndrome for many years. However, endoscopic release for recurrent carpal tunnel syndrome after previous surgical release has not been reported. Nine hands in six patients had recurrent carpal tunnel syndrome five to 20 years after previous open carpal tunnel release. All the cases were successfully treated with endoscopic release.

scholarly journals Accuracy of Carpal Tunnel Injection: A Prospective Evaluation of 756 Patients

Hand ◽  
2018 ◽  
Vol 15 (1) ◽  
pp. 54-58 ◽  
Author(s):  
David P. Green ◽  
Brendan J. MacKay ◽  
Steven J. Seiler ◽  
Michael T. Fry
Keyword(s):  
Median Nerve ◽  
Carpal Tunnel ◽  
Corticosteroid Injection ◽  
Carpal Tunnel Release ◽  
Therapeutic Modality ◽  
Injection Technique ◽  
Anatomic Landmarks ◽  
Injection Techniques ◽  
Open Carpal Tunnel Release ◽  
Tunnel Injection

Background: Corticosteroid injection into the carpal tunnel is both a diagnostic test and a therapeutic modality in the treatment of carpal tunnel syndrome. Many injection techniques are described in the literature. Improper placement of injection may result in damage to neurovascular structures in the carpal canal or decrease efficacy of the test and/or therapy. The purpose of this study is to determine if carpal tunnel injection using anatomic landmarks is reproducible and safe. A review of the senior author’s injection technique is presented. Methods: Over 8 years, there were 756 attempted placements of a 25-gauge needle into the carpal tunnel in a simulated carpal tunnel injection prior to open carpal tunnel release. The needle was inserted at the wrist crease, just ulnar to palmaris longus. Open carpal tunnel release was subsequently performed, and position of the needle was recorded. Results: In 572 patients (75.7%), the needle was found to be in the carpal tunnel without penetration of contents. The needle was in the carpal tunnel but piercing the median nerve in 66 attempts (8.7%). The carpal tunnel was missed in 118 attempts (15.6%). Conclusions: This is the largest study looking at accuracy of carpal tunnel injection using anatomic landmarks. Our injection accuracy (75.7%) is less than reported in previous studies, which note 82% to 100% accuracy using the same injection technique. This may indicate that carpal tunnel injection is less reliable than previously thought. Safety of carpal tunnel injection remains an important concern. The median nerve was penetrated in 8.7% of attempts.

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