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Diabetes Res Clin Pract. 2010 May;88(2):157-63. doi: 10.1016/j.diabres.2010.02.011. Epub 2010 Mar 11.

Comparative electrophysiological techniques in the diagnosis of carpal tunnel syndrome in patients with diabetic polyneuropathy.

Author information

1
Marmara University School of Medicine, Department of Physical Medicine and Rehabilitation, Turkey. drilkery@yahoo.com

Abstract

OBJECTIVE:

To determine utility of comparative electrophysiological techniques in differentiating carpal tunnel syndrome (CTS) in the background of diabetic polyneuropathy (DPN).

DESIGN:

Ninety diabetic patients were classified into three groups: normal, CTS, and DPN according to nerve conduction studies (NCSs). The patients in the DPN group were divided into two subgroups of DPN and DPN-CTS according to clinical criteria. The comparative electrophysiological parameters including median-radial sensory distal latency difference (M-RSLD), median-ulnar sensory distal latency difference (M-USLD) and lumbrical-interosseous median-ulnar distal latency difference (LIMULD) were compared in subgroups of DPN, DPN-CTS and CTS.

RESULTS:

Thirty-five (38.8%), 47 (52.3%), and 8 (8.9%) patients were diagnosed as CTS, DPN, and normal, respectively, according to NCS. After clinical stratification, 25 patients were diagnosed as DPN and 22 patients were diagnosed as DPN-CTS. The mean M-USLD and LIMULD values were similar in CTS and DPN-CTS groups, but larger than DPN statistically (p<0.05 for all). LIMULD, M-RSLD and M-USLD were positive in 88.4, 73 and 54% in the DPN-CTS group, respectively.

CONCLUSIONS:

Electrophysiological abnormalities were common in diabetic patients and LIMULD can identify CTS in diabetic DPN patients better than M-RSLD and M-USLD.

PMID:
20223548
DOI:
10.1016/j.diabres.2010.02.011
[Indexed for MEDLINE]

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