scholarly journals Cross‐sectional area in median and ulnar nerve ultrasound correlates with hand volume

2020 ◽  
Vol 62 (1) ◽  
pp. 83-88
Author(s):  
Melis Tahmaz ◽  
Min‐Suk Yoon ◽  
Peter D. Schellinger ◽  
Jörg Philipps
Keyword(s):  
Ulnar Nerve ◽  
Cross Sectional Area ◽  
Sectional Area ◽  
Nerve Ultrasound ◽  
Cross Sectional ◽  
Hand Volume

4. Median/ulnar nerve ultrasound cross-sectional area ratio in ALS

2018 ◽  
Vol 129 (4) ◽  
pp. e2
Author(s):  
Jun Tsugawa ◽  
Yu-ichi Noto ◽  
Thanuja Dharmadasa ◽  
Nidhi Garg ◽  
Matthew C. Kiernan
Keyword(s):  
Ulnar Nerve ◽  
Area Ratio ◽  
Cross Sectional Area ◽  
Sectional Area ◽  
Nerve Ultrasound ◽  
Cross Sectional

Role of diffusion tensor imaging in the evaluation of ulnar nerve involvement in leprosy

2021 ◽  
pp. 20210290
Author(s):  
Ankita Aggarwal ◽  
Chandan Jyoti Das ◽  
Neena Khanna ◽  
Raju Sharma ◽  
Deep Narayan Srivastava ◽  
...  
Keyword(s):  
Diffusion Tensor Imaging ◽  
Peripheral Neuropathy ◽  
Ulnar Nerve ◽  
Diffusion Tensor ◽  
Cross Sectional Area ◽  
Ulnar Neuropathy ◽  
Control Group ◽  
Sectional Area ◽  
Cross Sectional

Objective: Early detection of peripheral neuropathy is extremely important as leprosy is one of the treatable causes of peripheral neuropathy. The study was undertaken to assess the role of diffusion tensor imaging (DTI) in ulnar neuropathy in leprosy patients. Methods: This was a case–control study including 38 patients (72 nerves) and 5 controls (10 nerves) done between January 2017 and June 2019. Skin biopsy proven cases of leprosy, having symptoms of ulnar neuropathy (proven on nerve conduction study) were included. MRI was performed on a 3 T MR system. Mean cross-sectional area, fractional anisotropy (FA) and apparent diffusion coefficient (ADC) values of ulnar nerve at cubital tunnel were calculated. Additional ancillary findings and appearance of base sequences were evaluated. Results: Ulnar nerve showed thickening with altered T2W signal in all the affected nerves, having an average cross-sectional area of 0.26 cm2. Low FA with mean of 0.397 ± 0.19 and high ADC with mean of 1.28 ± 0.427 x 10 −3 mm2/s of ulnar nerve in retrocondylar groove was obtained. In the control group, mean cross-sectional area was 0.71cm2 with mean FA and ADC of 0.53 ± 0.088 and 1.03 ± 0.24 x 10 −3 mm2/s respectively. Statistically no significant difference was seen in diseased and control group. Cut-off to detect neuropathy for FA and ADC is 0.4835 and 1.1020 × 10 −3 mm2/s respectively. Conclusion: DTI though is challenging in peripheral nerves, however, is proving to be a powerful complementary tool for assessment of peripheral neuropathy. Our study validates its utility in infective neuropathies. Advances in knowledge: 1. DTI is a potential complementary tool for detection of peripheral neuropathies and can be incorporated in standard MR neurography protocol. 2. In leprosy-related ulnar neuropathy, altered signal intensity with thickening or abscess of the nerve is appreciated along with locoregional nodes and secondary denervation changes along with reduction of FA and rise in ADC value. 3. Best cut-offs obtained in our study for FA and ADC are 0.4835 and 1.1020 × 10 −3 mm2/s respectively.

scholarly journals High‐Resolution Nerve Ultrasound to Assess Nerve Echogenicity, Fascicular Count, and Cross‐Sectional Area Using Semiautomated Analysis

2020 ◽  
Vol 30 (4) ◽  
pp. 493-502
Author(s):  
Donata Gamber ◽  
Jeremias Motte ◽  
Antonios Kerasnoudis ◽  
Min‐Suk Yoon ◽  
Ralf Gold ◽  
...  
Keyword(s):  
High Resolution ◽  
Cross Sectional Area ◽  
Sectional Area ◽  
Nerve Ultrasound ◽  
Cross Sectional

scholarly journals Nerve ultrasound in the assessment of cross-sectional area in healthy children

2020 ◽  
Vol 10 (2) ◽  
pp. 46-52
Author(s):  
M. A. Bedova ◽  
A. V. Klimkin ◽  
V. B. Voitenkov ◽  
N. V. Skripchenko
Keyword(s):  
Cross Sectional Area ◽  
Normative Values ◽  
Technical Equipment ◽  
Healthy Children ◽  
Sectional Area ◽  
Nerve Ultrasound ◽  
Cross Sectional ◽  
Group 13 ◽  
The Cross ◽  
Crosssectional Area

Introduction. Nerve ultrasound continues to progress due to improved technical equipment and knowledge, but so far not enough research has been done to determine the normative values of the cross-sectional area in children, and the obtained results differ between laboratories and researchers.Aim of the study. To determine the normative values of peripheral nerves» cross-sectional area in children 5–18 years old.Materials and methods. High resolution nerve ultrasound of brachial plexus, median, ulnar, radial, femoral, sciatic, tibial and peroneal nerves was performed in 30 children in real time. Nerve trunks were visualized throughout the limb from both sides. The cross-sectional area of the nerves was measured by a manual tracing method with the rounding of the hypoechogenic contours of the nerve trunk. Nerves’ crosssectional area was measured at distal and proximal sites. The obtained data were statistically processed using Excel and Statistica 10.Results. No bilateral cross-sectional area’s differences were found in children. Boys had significantly thicker nerves compared to girls, older age group (13–17 years old) compared to younger ones. There was a significant correlation between cross-sectional area of the median nerve at the level of the wrist, sciatic nerve and children’ height and weight.Conclusions. The normal values of cross-sectional area in children can be used in the practical work of a neurologists, neurophysiologists and ultrasound technicians.

Cross-sectional area of the ulnar nerve after decompression at the cubital tunnel

2016 ◽  
Vol 41 (8) ◽  
pp. 838-842 ◽  
Author(s):  
S. Duetzmann ◽  
K. G. Krishnan ◽  
F. Staub ◽  
J.-S. Kang ◽  
V. Seifert ◽  
...  
Keyword(s):  
Ulnar Nerve ◽  
Cross Sectional Area ◽  
Cubital Tunnel ◽  
Slight Reduction ◽  
Sectional Area ◽  
Level Of Evidence ◽  
Cross Sectional ◽  
The Mean ◽  
The Cross

A total of 48 patients undergoing surgical decompression of the ulnar nerve at the cubital tunnel between February 2010 and May 2013 were retrospectively studied to determine changes in the cross-sectional area of the nerve by the technique of neurosonography. The mean follow-up was 46 months. Post-operative follow-up examination of the cross-sectional area of the ulnar nerve showed a slight reduction in the mean value from 13.8 mm2 (pre-operative) to 12.9 mm2 (post-operative). Of the 48 patients, 36 showed a reduction in the cross-sectional area. No correlation was detected between the clinical and sonographic outcomes. Ultrasound seems to be of limited value in the post-operative assessment of patients with entrapment neuropathy of the ulnar nerve. Level of Evidence: IV

scholarly journals Ultrasound diagnosis of ulnar nerve entrapment by confirming baseline cross-sectional area measurement for normal and abnormal nerves

2015 ◽  
Vol 19 (1) ◽  
Author(s):  
Tania Roodt ◽  
Barbara Van Dyk ◽  
Sylvia Jacobs
Keyword(s):  
Ulnar Nerve ◽  
Imaging Modality ◽  
Cross Sectional Area ◽  
Nerve Entrapment ◽  
Area Measurement ◽  
Healthy Controls ◽  
Sectional Area ◽  
High Frequency Ultrasound ◽  
Cross Sectional ◽  
Ulnar Nerve Entrapment

Background: Magnetic resonance imaging is most commonly employed, alongside electrodiagnostic studies, in the diagnosis of ulnar nerve entrapment. It is expensive, time consuming, not readily available to the general public, and limits imaging to a segment of the nerve at any given time. In contrast, high-frequency ultrasound is an inexpensive imaging modality with a flexible field of view through which the nerve can be traced. An ultrasound cross-sectional area (CSA) >0.075 cm² has previously been suggested as indicative of nerve entrapment. Objectives: To confirm the suggested CSA measurement of 0.075 cm² and discuss the difference in CSA measurement between abnormal nerves, nerves in the contra-lateral elbow of the same participant, and those of asymptomatic participants. Methods: Ultrasonography was performed on both elbows of 25 patients with confirmed unilateral ulnar nerve entrapment and on 25 healthy controls for comparison. Three CSA measurements were taken of the ulnar nerve along its course, and the mean measurement was recorded.Results: CSA measurements were significantly different between patients with ulnar nerve entrapment and healthy controls (p < 0.05). In our study, a CSA >0.070 cm² defined ulnar nerve entrapment at the elbow. Conclusion: Ultrasound CSA measurement of the ulnar nerve is accurate in the diagnosis of ulnar nerve entrapment. The range of values and varied criteria previously reported call for standardisation of the procedure and CSA measurement. We suggest that a measurement of 0.070 cm² be considered as a new baseline for the optimal diagnosis of ulnar nerve entrapment.[PDF to follow]

079 Nerve ultrasound cross sectional area does not correlate with electrodiagnostic carpal tunnel severity in the very elderly

2018 ◽  
Vol 89 (6) ◽  
pp. A32.2-A32
Author(s):  
Eoin Mulroy ◽  
Luciana Pelosi
Keyword(s):  
Elderly Patients ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Cross Sectional Area ◽  
Age Group ◽  
Sectional Area ◽  
Very Elderly ◽  
Nerve Ultrasound ◽  
Cross Sectional ◽  
Nerve Enlargement

IntroductionUltrasound measurement of median nerve cross-sectional area (CSA) at the wrist has emerged as an accurate and useful complement to electrophysiology in the diagnosis of carpal tunnel syndrome (CTS).AANEM, 2012 A number of studies have also shown a positive correlation between median nerve CSA and electrodiagnostic severity. After noting absence of the expected nerve enlargement on ultrasound in some very elderly patients, we sought to correlate nerve ultrasound and electrodiagnostic findings in a very elderly population and to compare this with a population of younger patients.MethodsWe undertook a retrospective review of electrophysiology and ultrasound data collected during routine clinical practice at our institution over a 13 month period. The correlation between electrodiagnostic severity and median nerve CSA at the wrist in patients aged 40–65 years (59 patients, 70 hands) was compared with a population of very elderly patients aged ≥80 years (33 patients, 40 hands). The sensitivity of nerve ultrasound for the detection of CTS was calculated for both groups.ResultsIn the 40–65 years age group, there was a strong positive correlation between electrodiagnostic severity and median nerve CSA (r=0.79, p<0.01). In patients aged over 80 years, there was no significant correlation between the two techniques (r=0.09, p=0.57). Compared to ‘gold standard’ electrophysiologic tests, nerve ultrasound sensitivity for the detection of CTS was 98% in the 40–65 years age group and 62% in the very elderly group.ConclusionThe absence of expected median nerve enlargement in very elderly patients with electrodiagnostic evidence of CTS may reflect a different pathophysiologic response to distal median nerve entrapment in advanced age. Our data also suggests that nerve CSA measurement alone may not be a reliable tool for the detection of CTS in the very elderly. Further studies of its diagnostic accuracy in very elderly patients are warranted.

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