Significance of Amplitude and Area Ratio of Compound Muscle Action Potential in Diagnosis of Diabetic Neuropathy.
- Author:
Dong Won PARK
1
;
Ki Seok NAM
;
Sang Cheol KIM
;
Sang Il PARK
;
Eun CHOI
;
Yang Gyun LEE
Author Information
1. Department of Rehabilitation Medicine, Soonchunhyang University College of Medicine.
- Publication Type:Original Article
- Keywords:
Diabetic neuropathy;
Conduction velocity;
Amplitude ratio;
Area ratio
- MeSH:
Action Potentials*;
Diabetes Mellitus;
Diabetic Neuropathies*;
Diagnosis*;
Humans;
Median Nerve;
Neural Conduction;
Peroneal Nerve
- From:Journal of the Korean Academy of Rehabilitation Medicine
2001;25(4):615-620
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
OBJECTIVE: The purpose of this study is to find out whether amplitude ratio and area ratio have correlation with nerve conduction velocity in the diabetes mellitus patients. METHOD: Median and deep peroneal motor nerve conduction study was performed in thirty-five normal control group and sixty diabetes mellitus patients group. The motor conduction velocity, amplitude ratio, and area ratio of the compound muscle action potential (CMAP) were measured. The experimental subjects were divided into 6 subgroups (in median nerve: M1, M2, M3, in peroneal nerve: P1, P2, P3) according to the median value of conduction velocity of each nerve; group M1 (n=35) and P1 (n=30): normal control group, group M2 (n=25) and P2 (n=30): below the median value of motor nerve conduction velocity in diabetes mellitus patients, group M3 (n=23) and P3 (n=29): above the median value of motor nerve conduction velocity in diabetes mellitus patients. RESULTS: There was no significant difference of area ratio between the each subgroups in both median and peroneal nerves. There was a significant difference of amplitude ratio between the M1 and M2 subgroups. There was a significant difference of amplitude ratio between the P1 and P2, P3 subgroups. CONCLUSION: According to above results, the decrease of amplitude of compound muscle action potential along with the decrease of conduction velocity seems to be helpful in the electrophysiologic diagnosis of diabetic neuropathy.
