Biomedical subjects

D L Mondell

Publications and source records attributed to D L Mondell.

3 recordsLinked to original sources

PubMed1986

Carpal tunnel syndrome in the nonparetic hands of hemiplegics. Stress-induced by ambulatory assistive devices.

Three patients who had earlier sustained an acute stroke were admitted to a rehabilitation bed service. Clinically, they developed symptoms suggestive of carpal tunnel syndrome (CTS) in their nonparetic hands during a progressive ambulation training program which included ambulatory assistive devices. In each patient, the diagnosis was confirmed by electrodiagnostic evaluation. Two of the three patients were subsequently provided with forearm platform attachments for their assistive devices, and cock-up wrist splints, in an attempt to decrease compression of the median nerve. Despite these measures, both remained symptomatic and had electrodiagnostic evidence of progressive CTS. They were referred for surgical decompression of the median nerve. The third patient had resolution of symptoms when she became able to ambulate without need of an assistive device. These cases are examples of CTS secondary to excessive pressure in the nonparetic hands of hemiparetic patients, believed to occur more frequently than is clinically recognized.

Aged↗

PubMed1986

Proximal forearm ulnar nerve conduction techniques.

Compression of the ulnar nerve across the elbow is a common clinical diagnosis frequently referred for electrodiagnostic evaluation. Motor conduction studies with recording over the abductor digiti minimi and stimulating proximal and distal to the ulnar notch have been the standard technique employed in these evaluations--mean, 60.0 m/s; SD 5.0 m/s. Two other techniques are described, with data from normal subjects, recording from proximal forearm muscles. One technique is a refinement of a previously described method recording from the flexor carpi ulnaris--mean, 63.0 m/s; SD, 4.7 m/s. The second is a newly developed technique recording from the flexor digitorum profundus--mean, 63.0 m/s; SD, 5.5m/s. All three methods were found to have a small range of comparable normal values, and appear to be easily and quickly performed with reliable and reproducible information. The techniques described enhance specific localization of ulnar nerve lesions, and may prove useful when more distal recording sites are unavailable.

Action Potentials↗

PubMed1986

Evoked sensory nerve action potentials: effect of different recording electrodes on distal latencies and amplitudes.

The evoked sensory nerve action potentials (ESAP) of the median nerve were studied in 20 subjects using an antidromic technique, recording the distal latency to onset and to peak, and peak to peak amplitude, using three different recording electrodes. The electrodes used were the TECA digital ring electrodes, AERO MED wire loop stretch and squeeze-type electrodes, and Neurodiagnostic finger clip electrodes. Because the Neurodiagnostic finger clip electrodes are wider than the others, they were placed at different points over the proximal and distal interphalangeal joints to evaluate any changes in the ESAP caused by different interelectrode distance. The values obtained for the distal latencies and amplitudes for each electrode were compared using the unpaired Student's t-test. There were no statistically significant differences found in the ESAP distal latencies to onset or peak using any of the electrodes or various placements. When comparing the amplitude responses, the only statistically significant difference was noted when the TECA digital ring electrodes were compared to a particular arrangement of the Neurodiagnostic finger clip electrodes (p less than 0.05). It was therefore concluded that any of these electrodes can be used to obtain reliable reproducible data for nerve conduction studies.

Adult↗