T2 mapping of the median nerve in patients with carpal tunnel syndrome and healthy volunteers

2021 ◽  
Vol 63 (5) ◽  
pp. 774-777
Author(s):  
Atsushi Maeda ◽  
Taku Suzuki ◽  
Katsuhiko Hayakawa ◽  
Takuya Funahashi ◽  
Takashi Kuroiwa ◽  
...  
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Healthy Volunteers ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
T2 Mapping ◽  
Tunnel Syndrome

scholarly journals Transverse Plane Tendon and Median Nerve Motion in the Carpal Tunnel: Ultrasound Comparison of Carpal Tunnel Syndrome Patients and Healthy Volunteers

PLoS ONE ◽  
2012 ◽  
Vol 7 (5) ◽  
pp. e37081 ◽  
Author(s):  
Margriet H. M. van Doesburg ◽  
Jacqueline Henderson ◽  
Aebele B. Mink van der Molen ◽  
Kai-Nan An ◽  
Peter C. Amadio
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Healthy Volunteers ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Transverse Plane ◽  
Tunnel Syndrome

scholarly journals Carpal Tunnel Syndrome Assessment with Ultrasonography: Value of Inlet-to-Outlet Median Nerve Area Ratio in Patients versus Healthy Volunteers

PLoS ONE ◽  
2015 ◽  
Vol 10 (1) ◽  
pp. e0116777 ◽  
Author(s):  
Tengfei Fu ◽  
Manlin Cao ◽  
Fang Liu ◽  
Jiaan Zhu ◽  
Dongmei Ye ◽  
...  
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Healthy Volunteers ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Area Ratio ◽  
Tunnel Syndrome

Carpal Tunnel Syndrome Assessment with US: Value of Additional Cross-sectional Area Measurements of the Median Nerve in Patients versus Healthy Volunteers

Radiology ◽  
2009 ◽  
Vol 250 (1) ◽  
pp. 171-177 ◽  
Author(s):  
Andrea S. Klauser ◽  
Ethan J. Halpern ◽  
Tobias De Zordo ◽  
Gudrun M. Feuchtner ◽  
Rohit Arora ◽  
...  
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Healthy Volunteers ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Cross Sectional Area ◽  
Sectional Area ◽  
Cross Sectional ◽  
Tunnel Syndrome

scholarly journals Feasibility of sagittal T2 mapping of the median nerve in patients with carpal tunnel syndrome

2018 ◽  
pp. 1-6
Author(s):  
Takashi Nishii ◽  
Hideki Yoshikawa ◽  
Hiroyuki Tanaka ◽  
Hisashi Tanaka ◽  
Takashi Nishii ◽  
...  
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
T2 Mapping ◽  
Resonance Imaging ◽  
Normal Volunteers ◽  
Tunnel Syndrome ◽  
Magnetic Resonance Imaging Mri ◽  
Flattening Ratio ◽  
Medial Nerve

Purpose: To evaluate patients with carpal tunnel syndrome (CTS) by using 3-Tesla magnetic resonance imaging (MRI) sagittal T2 mapping of the median nerve for localization of abnormal regions. Material and Methods: Nine hands of seven patients with CTS and five hands of five healthy volunteers were evaluated using sagittal T2 mapping and axial spoiled gradient-echo (SPGR) images. Three regions of interest (ROIs) at the carpal tunnel (ROI-1 to ROI-3) and one control ROI distal to the carpal tunnel (ROIC) were defined on the median nerve and T2-ratios at ROI-1 to ROI-3 relative to ROI-C were calculated. The flattening ratio (F-ratio; width/height of the median nerve) was also calculated from the axial SPGR images. Results: On sagittal T2 mapping, the medial nerve of normal volunteers showed constant T2 values at all ROIs. In the patients with CTS, there was large variation in T2 among the ROIs and the region of highest T2 value varied among the patients. T2-ratios at ROI-2 and -3 and the F-ratios along all carpal tunnel levels were significantly higher in the patients with CTS than in the normal volunteers. A significant correlation was found between terminal latency and T2-ratio at ROI-2 but not between terminal latency and F-ratio. Conclusion: Sagittal T2 mapping was feasible for the localization of abnormal T2 regions of the median nerve in patients with CTS.

scholarly journals Effects of wrist extension on median nerve and flexor tendon excursions in patients with carpal tunnel syndrome: a case control study

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Chien-Ting Liu ◽  
Dung-Huan Liu ◽  
Chii-Jen Chen ◽  
You-Wei Wang ◽  
Pao-Sheng Wu ◽  
...  
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Healthy Volunteers ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Flexor Tendon ◽  
Wrist Extension ◽  
Finger Flexion ◽  
Tunnel Syndrome ◽  
Healthy Participants ◽  
Tendon Excursion

Abstract Background Reduced gliding ability of the median nerve in the carpal tunnel has been observed in patients with carpal tunnel syndrome (CTS). The purpose of this study was to evaluate the gliding abilities of the median nerve and flexor tendon in patients with CTS and healthy participants in the neutral and 30° extended positions of the wrist and to compare the gliding between the finger flexion and extension phases. Methods Patients with CTS and healthy participants were consecutively recruited in a community hospital. All the subjects received the Boston CTS questionnaire, physical examinations, nerve conduction study (NCS), and ultrasonography of the upper extremities. Duplex Doppler ultrasonography was performed to evaluate the gliding abilities of the median nerve and flexor tendon when the subjects continuously moved their index finger in the neutral and 30° extension positions of the wrist. Results Forty-nine patients with CTS and 48 healthy volunteers were consecutively recruited. Significant differences in the Boston CTS questionnaire, physical examination and NCS results and the cross-sectional area of the median nerve were found between the patients and the healthy controls. The degree of median nerve gliding and the ratio of median nerve excursion to flexor tendon excursion in the CTS group were significantly lower than those in the healthy control group in both the neutral and 30° wrist extension positions. Significantly increased excursion of both the median nerve and flexor tendon from the neutral to the extended positions were found in the CTS group. The ratio of median nerve excursion to flexor tendon excursion was significantly higher in the finger flexion phase than in the extended phase in both groups, and this ratio had mild to moderate correlations with answers on the Boston CTS Questionnaire and with the NCS results. Conclusions Reduced excursion of the median nerve was found in the patients with CTS. The ratio of median nerve excursion to flexor tendon excursion was significantly lower in the patients with CTS than in the healthy volunteers. The median nerve excursion was increased while the wrist joint was extended to 30° in the patients with CTS. Wrist extension may be applied as part of the gliding exercise regimen for patients with CTS to improve median nerve mobilization.

scholarly journals POS0584 ULTRASONOGRAPHY OF THE MEDIAN NERVE IN PATIENTS WITH RHEUMATOID ARTHRITIS UNDER SUSPICION OF CARPAL TUNNEL SYNDROME

2021 ◽  
Vol 80 (Suppl 1) ◽  
pp. 525.1-525
Author(s):  
S. Tsiami ◽  
E. Ntasiou ◽  
C. Krogias ◽  
R. Gold ◽  
J. Braun ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Carpal Tunnel Syndrome ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Nerve Conduction Velocity ◽  
Sectional Area ◽  
Cross Sectional ◽  
Spearman's Rho ◽  
Spearman’S Rho ◽  
Tunnel Syndrome

Background:Carpal tunnel syndrome (CTS) is the most common nerve compression syndrome and a common extra-articular manifestation of rheumatoid arthritis (RA). Different causes of CTS are known, among them inflammatory and non-inflammatory pathologies. Electroneurography (ENG) of the median nerve, the method of choice to diagnose CTS, measures impairment of nerve conduction velocity without explaining its underlying cause. However, because the electrical stimulation is often not well tolerated, ENG results may come out inconclusive. Using greyscale ultrasonography (GS-US) provides anatomic information including a structural representation of the carpal tunnel.Objectives:To investigate the performance of nerve GS-US in the diagnosis of CTS in patients with RA.Methods:Consecutive patients with active RA under suspicion of CTS presenting to a large rheumatologic center were included. Both hands were examined by an experienced neurologist including ENG and a GS-US (ML linear probe with 6-15 Hz) of the median nerve. An established grading system for ENG (1), and an established system for GS-US based on cut-offs for the nerve cross sectional area (CSA) [mild: 0,11-0,13cm2, moderate: 0,14-0,15 cm2, severe: > 0,15 cm2 CTS (2)] were used. In addition, the Boston Carpal Tunnel Syndrome Questionnaire (BCTSQ) was used to assess CTS symptoms (3).Results:Both hands of 58 patients with active RA (n=116) and clinical suspicion of CTS (in 38 cases bilaterally) were included. After clinical examination, CTS was suspicious in 96 hands (82.8%), and 59 of all hands had a final diagnosis of CTS (50.9%). Of the latter, 43 hands (72.9%) had a positive ENG and 16 (27.1%) a positive GS-US finding only, while 30 hands (50.8%) were positive in both examinations.There was a good correlation of the cross-sectional area (CSA) as well as the CSA-ratio to the ENG findings: the larger the CSA, the more severe was the CTS as assessed by ENG (Spearman’s rho=0.554; p<0.001). The more severe the GS-US findings of CTS were, the more definite were the distal motor latency (Spearman’s rho=0.554; p<0.001) and sensible nerve conduction velocity of the median nerve (Spearman’s rho=-0.5411; p<0.001).In the 46 hands positive in GS-US, tenosynovial hypertrophy of the flexor tendons was detected in 19 hands (41.3%), 7 of which (36.8%) also showed an additional cystic mass. In these 19 patients, clinical complains were more severely present than in patients with non-inflammatory CTS, as assessed by the BCTSQ with a total score of 68.8±13.4 vs. 59.3±13.7, respectively (p=0.007).Conclusion:In patients with active RA and clinical complains of CTS, ultrasound examinations provide additional information about inflammation which is helpful for a diagnosis of CTS. Thus, ENG and nerve GS-US should be used complementary for a diagnostic workup of CTS in RA patients with a suspicion of CTS. Power-Doppler may further improve the diagnostic performance of GS-US.References:[1]Padua L et al. Acta Neurol Scand 1997; 96:211–217[2]El Miedany et al., Rheumatology (Oxford). 2004 Jul; 43(7):887-895[3]Levine DW et al. J Bone Joint Surg Am 1993; 75: 1585-1592Figure 1.BCTSQ scores in patients with diagnosis of CTS and absence or presence of RA-related tenosynovial hypertrophyDisclosure of Interests:None declared

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