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Yuntae Kim - One of the best experts on this subject based on the ideXlab platform.
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sonography guided recording for superficial peroneal sensory Nerve Conduction Study
Muscle & Nerve, 2018Co-Authors: Ki Hoon Kim, Byung Kyu Park, Dong Hwee Kim, Yuntae KimAbstract:INTRODUCTION We sought to establish the optimal recording position for antidromic Conduction of the superficial peroneal Nerve (SPN) by using ultrasonography (USG). METHODS The sensory Nerve action potentials (SNAPs) of the intermediate dorsal cutaneous Nerve (IDCN) and medial dorsal cutaneous Nerve (MDCN) in 64 limbs of 32 healthy participants were recorded (Nerve Conduction Study [NCS]-1). Both Nerves were identified by using USG, and the SNAPs were obtained from the USG-guided repositioned electrodes (NCS-2). RESULTS The IDCN and MDCN were located at 29.3% ± 5.1% and 43.9% ± 4.9% of the intermalleolar distance from the lateral malleolus, respectively. Significantly greater amplitude was shown for SNAPs of both Nerves in NCS-2 versus NCS-1. DISCUSSION The optimal recording position is likely to be lateral, one-third from the lateral malleolus for the IDCN, and just lateral to the midpoint of the intermalleolar line for the MDCN. When the SPN response is unexpectedly attenuated, USG-guided repositioning of the electrodes should be considered. Muscle Nerve 57: 628-633, 2018.
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Optimal Radial Motor Nerve Conduction Study Using Ultrasound in Healthy Adults.
Annals of Rehabilitation Medicine, 2017Co-Authors: Jungho Yeo, Yuntae Kim, Soo-a Kim, Hyungdong KangAbstract:OBJECTIVE To obtain reference values, to suggest optimal recording and stimulation site for radial motor Nerve Conduction Study (RmNCS), and to analyze the correlation among RmNCS parameters, demographics and ultrasonography (US) findings. METHODS A total of 55 volunteers participated in this Study. We hypothesized that 'lateral edge of spiral groove (A)' was the optimal stimulation site, and the 'largest cross-sectional area (CSA) of extensor indicis proprius (EIP) muscle (B)' was the optimal recording site. The surface distance between 'A' and the lateral epicondyle of the humerus divided by upper arm length, was named the spiral groove ratio. The surface distance between 'B' and the ulnar styloid process divided by forearm length, was named the EIP ratio. Using US, we identified these sites, and further conducted RmNCS. RESULTS Data was collected from 100 arms of the 55 volunteers. Mean amplitude and latency were 5.7±1.1 mV and 5.7±0.5 ms, respectively, at the spiral groove, and velocity between elbow and spiral groove was 73.7±7.0 m/s. RmNCS parameters correlated significantly with height, weight, arm length, and CSA of the EIP muscle. Spiral groove ratio and EIP ratio were 0.338±0.03 and 0.201±0.03, respectively; both values were almost the same, regardless of age, sex and handedness. CONCLUSION We established a reference value and standardized method of RmNCS using US. Optimal RmNCS can be conducted by placing the recording electrode 20% (about one-fifth) of forearm length from the ulnar styloid process, and stimulating at 34% (about one-third) of the humeral length from the lateral epicondyle.
Banu Kuran - One of the best experts on this subject based on the ideXlab platform.
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comparison of ultrasonography and short segment Nerve Conduction Study in ulnar neuropathy at the elbow
Archives of Physical Medicine and Rehabilitation, 2018Co-Authors: Rana Terlemez, Figen Yilmaz, Beril Dogu, Banu KuranAbstract:Abstract Objective To assess the correlation between ultrasonographic and electrodiagnostic findings to determine the localization of the ulnar trapping at the elbow. Design Cross-sectional and noninterventional trial. Setting Physical medicine and rehabilitation department of a teaching hospital. Participants Patients (N=14) diagnosed with ulnar Nerve entrapment using short-segment Nerve Conduction Study. Interventions The elbow area was divided into 4 segments with 2-cm intervals. All patients underwent ultrasonographic and electrodiagnostic examinations. Main Outcome Measures The Nerve Conduction velocity (NCV) of each segment was measured. The cross-sectional area (CSA) of the ulnar Nerve was measured at 5 levels. The proximal CSA/distal CSA ratio (PDR) was calculated by proportioning the CSA values for each segment. The highest PDR was accepted as a trapping segment, whereas the segment with the lowest NCV was accepted electrophysiologically (provided it was Results A total of 80 PDR and NCV measurements were taken from 20 elbows. A statistically significant negative correlation (r=−.554; P Conclusions Ultrasonography seems to be advantageous because it is more comfortable for the patient and requires shorter time than does electroneuromyography. To our knowledge, this is the first Study to detect ulnar Nerve entrapment by using not only CSA but also PDR as a ratio method with ultrasound.
Ki Hoon Kim - One of the best experts on this subject based on the ideXlab platform.
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sonography guided recording for superficial peroneal sensory Nerve Conduction Study
Muscle & Nerve, 2018Co-Authors: Ki Hoon Kim, Byung Kyu Park, Dong Hwee Kim, Yuntae KimAbstract:INTRODUCTION We sought to establish the optimal recording position for antidromic Conduction of the superficial peroneal Nerve (SPN) by using ultrasonography (USG). METHODS The sensory Nerve action potentials (SNAPs) of the intermediate dorsal cutaneous Nerve (IDCN) and medial dorsal cutaneous Nerve (MDCN) in 64 limbs of 32 healthy participants were recorded (Nerve Conduction Study [NCS]-1). Both Nerves were identified by using USG, and the SNAPs were obtained from the USG-guided repositioned electrodes (NCS-2). RESULTS The IDCN and MDCN were located at 29.3% ± 5.1% and 43.9% ± 4.9% of the intermalleolar distance from the lateral malleolus, respectively. Significantly greater amplitude was shown for SNAPs of both Nerves in NCS-2 versus NCS-1. DISCUSSION The optimal recording position is likely to be lateral, one-third from the lateral malleolus for the IDCN, and just lateral to the midpoint of the intermalleolar line for the MDCN. When the SPN response is unexpectedly attenuated, USG-guided repositioning of the electrodes should be considered. Muscle Nerve 57: 628-633, 2018.
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Ultrasonographic Evaluation of Sural Nerve for Nerve Conduction Study
Annals of rehabilitation medicine, 2014Co-Authors: Ki Hoon Kim, Ji-yoon Yoo, Byung-chun YouAbstract:Objective To understand various morphologic types and locations of the sural Nerve (SN) that are important for Nerve Conduction studies or Nerve grafting procedures. The aim of this Study was to describe the course and variations of the SN based on ultrasonographic findings for an adequate Nerve Conduction Study. Methods A total of 112 SNs in 56 volunteers with no history of trauma or surgery were examined by ultrasonography. The location and formation of the SNs in relation to the medial and lateral sural cutaneous Nerve were investigated. We measured the horizontal distance between the SNs and the midline of the calf at the level of 14 cm from the lateral malleolus, and the distance between the SNs and the most prominent part of the lateral malleolus. Results SN variants was classified into four types according to the medial and lateral sural cutaneous Nerve; type 1 (73.2%), type 2 (17.9%), type 3 (8.0%), and type 4 (0.9%). The mean distance between the SN and the midline of the calf was 1.02±0.63 cm, the SN and the most prominent part of the lateral malleolus was 2.14±0.15 cm. Conclusion Variations in the location and formation of the SN was examined by ultrasonography, and the results of this Study would increase the accuracy of the SN Conduction Study.
Wei Liang - One of the best experts on this subject based on the ideXlab platform.
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effect of elbow position on short segment Nerve Conduction Study in cubital tunnel syndrome
Chinese Medical Journal, 2016Co-Authors: Zhu Liu, Zhirong Jia, Tingting Wang, Xin Shi, Wei LiangAbstract:Background: The appropriate elbow position of short-segment Nerve Conduction Study (SSNCS) to diagnose cubital tunnel syndrome (CubTS) is still controversial. The goal of this Study was to determine the effect of different elbow positions at full extension and 70° flexion on SSNCS in CubTS. Methods: In this cross-sectional Study, the clinical data of seventy elbows from 59 CubTS patients between September, 2011 and December, 2014 in the Peking University First Hospital were included as CubTS group. Moreover, thirty healthy volunteers were included as the healthy group. SSNCS were conducted in all subjects at elbow full extension and 70° elbow flexion. Paired nonparametric test, bivariate correlation, Bland–Altman, and Chi-squared test analysis were used to compare the effectiveness of elbow full extension and 70° flexion elbow positions on SSNCS in CubTS patients. Results: Data of upper limit was calculated from healthy group, and abnormal latency was judged accordingly. CubTS group's latency and compound muscle action potential (CMAP) of each segment at 70° elbow flexion by SSNCS was compared with full extension position, no statistically significant difference were found (all P > 0.05). Latency and CMAP of each segment at elbow full extension and 70° flexion were correlated (all P P = 0.43), and the latency ( P = 0.15) and the CMAP ( P = 0.06) of segment of 2 cm to 4 cm below elbow. Bivariate correlation and Bland–Altman analysis proved the correlation between elbow full extension and 70° flexion. Especially in segments across the elbow (2 cm above the elbow and 2 cm below it), latency at elbow full extension and 70° flexion were strong direct associated ( r = 0.83, P r = 0.55, P r = 0.49, P r = 0.72, P P > 0.05, respectively). Conclusions: There was no statistically significant difference in the diagnosis of CubTS with the elbow at full extension compared with that at 70° flexion during SSNCS. We suggest that elbow positon at full extension can also be used during SSNCS.
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id 48 effects of elbow position on short segment Nerve Conduction Study of the ulnar Nerve
Clinical Neurophysiology, 2016Co-Authors: Zheng Liu, Zhirong Jia, Tingting Wang, Xin Shi, Wei LiangAbstract:Background elbow position in evaluation of the Cubital tunnel syndrome (CubTS) by short-segment Nerve Conduction Study (SSCSs) was still under discussion. This Study is to determine the effect of full extension and 70° of elbow flexion on SSCSs of the ulnar neuropathy. Method SSCSs were studied in 70 elbows from 59 CubTS patients at full extension and 70° of flexion. 30 healthy gender- and age-matched volunteers was included, and upper limit latency of each segment for abnormal standard was calculated. Result Latency and CMAP change was highly correlated between full extension and 70° of flexion by SSCSs, but can not be replaced by each other. There was no statistic significance of abnormality between full extension and 70° of flexion by SSCSs. Conclusion in our Study, full extension and 70° of flexion is no better than each other in diagnosis of CubTS, both can be performed just according to the situation of the investigators. For the subjects who are highly suspected CubTS but found negative results, and whose latency or CMAP change is around upper limit by SSCSs, should perform SSCSs in the other elbow position. And results 2 cm distal to medial epicondyle should be taken carefully to diagnose CubTS.
Dong Hwee Kim - One of the best experts on this subject based on the ideXlab platform.
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sonography guided recording for superficial peroneal sensory Nerve Conduction Study
Muscle & Nerve, 2018Co-Authors: Ki Hoon Kim, Byung Kyu Park, Dong Hwee Kim, Yuntae KimAbstract:INTRODUCTION We sought to establish the optimal recording position for antidromic Conduction of the superficial peroneal Nerve (SPN) by using ultrasonography (USG). METHODS The sensory Nerve action potentials (SNAPs) of the intermediate dorsal cutaneous Nerve (IDCN) and medial dorsal cutaneous Nerve (MDCN) in 64 limbs of 32 healthy participants were recorded (Nerve Conduction Study [NCS]-1). Both Nerves were identified by using USG, and the SNAPs were obtained from the USG-guided repositioned electrodes (NCS-2). RESULTS The IDCN and MDCN were located at 29.3% ± 5.1% and 43.9% ± 4.9% of the intermalleolar distance from the lateral malleolus, respectively. Significantly greater amplitude was shown for SNAPs of both Nerves in NCS-2 versus NCS-1. DISCUSSION The optimal recording position is likely to be lateral, one-third from the lateral malleolus for the IDCN, and just lateral to the midpoint of the intermalleolar line for the MDCN. When the SPN response is unexpectedly attenuated, USG-guided repositioning of the electrodes should be considered. Muscle Nerve 57: 628-633, 2018.
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ulnar Nerve Conduction Study of the first dorsal interosseous muscle in korean subjects
Annals of Rehabilitation Medicine, 2011Co-Authors: Dong Hwee KimAbstract:Objective To derive normative values for ulnar Nerve Conduction Study of the active recording electrode on the first dorsal interosseous muscle (FDI) and the reference electrode on the proximal phalanx of the thumb. Method Ulnar Nerve motor Conduction Study with FDI and abductor digiti minimi muscle (ADM) recording was performed in 214 hands of 107 healthy subjects. Ulnar NCS was performed with 2 different recording electrode montages (ADM-base of 5(th) finger; FDI-thumb) and differences in latency and amplitude were compared. Using this technique, the initial positivity of ulnar compound muscle action potential (CMAP) was not observed in any response with FDI recording. Results The maximal values for distal motor latency to the ADM and FDI muscle were 3.8 ms and 4.4 ms, respectively. The maximal difference of distal motor latency between the bilateral FDI recordings was 0.6 ms. The maximal ipsilateral latency difference between ADM and FDI was 1.4 ms. Conclusion Placement of the reference electrode on the thumb results in a CMAP without an initial positivity and the normative values obtained may be useful in the diagnosis of ulnar neuropathy at the wrist.