Peripheral Nerve Lesions: Role of High-Resolution US

Radiographics ◽  
2003 ◽  
Vol 23 (6) ◽  
pp. e15-e15 ◽  
Author(s):  
Hong-Jen Chiou ◽  
Yi-Hong Chou ◽  
See-Ying Chiou ◽  
Ji-Bin Liu ◽  
Cheng-Yen Chang
Keyword(s):  
High Resolution ◽  
Peripheral Nerve ◽  
Nerve Lesions ◽  
Peripheral Nerve Lesions

Fascicular Ratio Pilot Study: High-Resolution Neurosonography—A Possible Tool for Quantitative Assessment of Traumatic Peripheral Nerve Lesions Before and After Nerve Surgery

Neurosurgery ◽  
2018 ◽  
Vol 85 (3) ◽  
pp. 415-422 ◽  
Author(s):  
Christian Heinen ◽  
Patrick Dömer ◽  
Thomas Schmidt ◽  
Bettina Kewitz ◽  
Ulrike Janssen-Bienhold ◽  
...  
Keyword(s):  
High Resolution ◽  
Peripheral Nerve ◽  
Quantitative Assessment ◽  
Control Group ◽  
Structural Reorganization ◽  
Magnetic Resonance Neurography ◽  
Nerve Lesions ◽  
Peripheral Nerve Lesions ◽  
Significant Difference ◽  
Nerve Surgery

Abstract BACKGROUND Clinical and electrophysiological assessments prevail in evaluation of traumatic nerve lesions and their regeneration following nerve surgery in humans. Recently, high-resolution neurosonography (HRNS) and magnetic resonance neurography have gained significant importance in peripheral nerve imaging. The use of the grey-scale-based “fascicular ratio” (FR) was established using both modalities allowing for quantitative assessment. OBJECTIVE To find out whether FR using HRNS can assess nerve trauma and structural reorganization in correlation to postoperative clinical development. METHODS Retrospectively, 16 patients with operated traumatic peripheral nerve lesions were included. The control group consisted of 6 healthy volunteers. All imaging was performed with a 15 to 6 MHz ultrasound probe (SonoSite X-Porte; Fujifilm, Tokyo, Japan). FR was calculated using Fiji (兠) on 8-bit-images (“MaxEntropy” using “Auto-Threshold” plug-in). RESULTS Thirteen of 16 patients required autologous nerve grafting and 3 of 16 extra-intraneural neurolysis. There was no statistical difference between the FR of nonaffected patients’ nerve portion with 43.48% and controls with FR 48.12%. The neuromatous nerve portion in grafted patients differed significantly with 85.05%. Postoperatively, FR values returned to normal with a mean of 39.33%. In the neurolyzed patients, FR in the affected portion was 78.54%. After neurolysis, FR returned to healthy values (50.79%). Ten of 16 patients showed clinical reinnervation. CONCLUSION To our best knowledge, this is the first description of FR using HRNS for quantitative assessment of nerve damage and postoperative structural reorganization. Our results show a significant difference in healthy vs lesioned nerves and a change in recovering nerve portions towards a more “physiological” ratio. Further evaluation in larger patient groups is required.

scholarly journals High-resolution ultrasonography in evaluating peripheral nerve entrapment and trauma

2009 ◽  
Vol 26 (2) ◽  
pp. E13 ◽  
Author(s):  
Ralph W. Koenig ◽  
Maria T. Pedro ◽  
Christian P. G. Heinen ◽  
Thomas Schmidt ◽  
Hans-Peter Richter ◽  
...  
Keyword(s):  
High Resolution ◽  
Peripheral Nerve ◽  
Peripheral Nerves ◽  
Imaging Modality ◽  
Nerve Entrapment ◽  
Nerve Lesions ◽  
Peripheral Nerve Lesions ◽  
Continuous Progress ◽  
Number Of Publications ◽  
High Resolution Ultrasonography

High-resolution ultrasonography is a noninvasive, readily applicable imaging modality, capable of depicting real-time static and dynamic morphological information concerning the peripheral nerves and their surrounding tissues. Continuous progress in ultrasonographic technology results in highly improved spatial and contrast resolution. Therefore, nerve imaging is possible to a fascicular level, and most peripheral nerves can now be depicted along their entire anatomical course. An increasing number of publications have evaluated the role of high-resolution ultrasonography in peripheral nerve diseases, especially in peripheral nerve entrapment. Ultrasonography has been shown to be a precious complementary tool for assessing peripheral nerve lesions with respect to their exact location, course, continuity, and extent in traumatic nerve lesions, and for assessing nerve entrapment and tumors. In this article, the authors discuss the basic technical considerations for using ultrasoniography in peripheral nerve assessment, and some of the clinical applications are illustrated.

Examination of Postoperative Peripheral Nerve Lesions with High-Resolution Sonography

2001 ◽  
Vol 177 (2) ◽  
pp. 415-419 ◽  
Author(s):  
Siegfried Peer ◽  
Gerd Bodner ◽  
Romed Meirer ◽  
Johann Willeit ◽  
Hildegunde Piza-Katzer
Keyword(s):  
High Resolution ◽  
Peripheral Nerve ◽  
Nerve Lesions ◽  
Peripheral Nerve Lesions

Examination of Postoperative Peripheral Nerve Lesions Using High-Resolution Sonography

2002 ◽  
Vol 178 (2) ◽  
pp. 510-511 ◽  
Author(s):  
Roy Beekman ◽  
Leo H. Visser ◽  
M. Cees Schoemaker
Keyword(s):  
High Resolution ◽  
Peripheral Nerve ◽  
Nerve Lesions ◽  
Peripheral Nerve Lesions

Evaluation of peripheral nerve lesions with high-resolution ultrasonography and color Doppler

2016 ◽  
Vol 64 (5) ◽  
pp. 1002 ◽  
Author(s):  
Muhammed Afsal ◽  
Veena Chowdhury ◽  
Anjali Prakash ◽  
Sapna Singh ◽  
Neera Chowdhury
Keyword(s):  
High Resolution ◽  
Peripheral Nerve ◽  
Color Doppler ◽  
Nerve Lesions ◽  
Peripheral Nerve Lesions ◽  
High Resolution Ultrasonography

scholarly journals High-Resolution MR Neurography of Diffuse Peripheral Nerve Lesions

2010 ◽  
Vol 32 (8) ◽  
pp. 1365-1372 ◽  
Author(s):  
S.K. Thawait ◽  
V. Chaudhry ◽  
G.K. Thawait ◽  
K.C. Wang ◽  
A. Belzberg ◽  
...  
Keyword(s):  
High Resolution ◽  
Peripheral Nerve ◽  
Mr Neurography ◽  
Nerve Lesions ◽  
Peripheral Nerve Lesions

High-resolution ultrasonography in the diagnosis and intraoperative management of peripheral nerve lesions

2011 ◽  
Vol 114 (1) ◽  
pp. 206-211 ◽  
Author(s):  
Franklin C. Lee ◽  
Harminder Singh ◽  
Levon N. Nazarian ◽  
John K. Ratliff
Keyword(s):  
High Resolution ◽  
Peripheral Nerve ◽  
Imaging Modality ◽  
Correct Diagnosis ◽  
Clinical History ◽  
Magnetic Resonance Neurography ◽  
Nerve Lesions ◽  
Peripheral Nerve Lesions ◽  
Intraoperative Management ◽  
High Resolution Ultrasonography

Object The diagnosis of peripheral nerve lesions relies on clinical history, physical examination, electrodiagnostic studies, and radiography. Magnetic resonance neurography offers high-resolution visualization of structural peripheral nerve lesions. The availability of MR neurography may be limited, and the costs can be significant. By comparison, ultrasonography is a portable, dynamic, and economic technology. The authors explored the clinical applicability of high-resolution ultrasonography in the preoperative and intraoperative management of peripheral nerve lesions. Methods The authors completed a retrospective analysis of 13 patients undergoing ultrasonographic evaluation and surgical treatment of nerve lesions at their institution (nerve entrapment [5], trauma [6], and tumor [2]). Ultrasonography was used for diagnostic (12 of 13 cases) and intraoperative management (6 of 13 cases). The authors examine the initial impact of ultrasonography on clinical management. Results Ultrasonography was an effective imaging modality that augmented electrophysiological and other neuroimaging studies. The modality provided immediate visualization of a sutured peroneal nerve after a basal cell excision, prompting urgent surgical exploration. Ultrasonography was used intraoperatively in 2 cases to identify postoperative neuromas after mastectomy, facilitating focused excision. Ultrasonography correctly diagnosed an inflamed lymph node in a patient in whom MR imaging studies had detected a schwannoma, and the modality correctly diagnosed a tendinopathy in another patient referred for ulnar neuropathy. Ultrasonography was used in 6 patients to guide the surgical approach and to aid in intraoperative localization; it was invaluable in localizing the proximal segment of a radial nerve sectioned by a humerus fracture. In all cases, ultrasonography demonstrated the correct lesion diagnosis and location (100%); in 7 (58%) of 12 cases, ultrasonography provided the correct diagnosis when other imaging and electrophysiological studies were inconclusive or inadequate. Conclusions High-resolution ultrasonography may provide an economical and accurate imaging modality with utility in diagnosis and management of peripheral nerve lesions. Further research is required to assess the role of ultrasonography in evaluation of peripheral nerve pathology.

scholarly journals Peripheral Nerve Lesions in a Case of Equine Motor Neuron Disease.

1999 ◽  
Vol 61 (5) ◽  
pp. 557-560 ◽  
Author(s):  
Hidefumi Furuoka ◽  
Mituru Hasegawa ◽  
Yoshiyasu Kobayashi ◽  
Takane Matsui
Keyword(s):  
Peripheral Nerve ◽  
Motor Neuron ◽  
Motor Neuron Disease ◽  
Nerve Lesions ◽  
Peripheral Nerve Lesions ◽  
Equine Motor Neuron Disease
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