TetraSens delivers electrical stimulation to the peripheral nerve and directly measures the evoked electromyographic (EMG) response of the muscle (compound muscle action potential, CMAP). This provides a precise and automatic measurement of muscle response to a stimulus.
Quick and easy application to either hand or foot
Single-patient use to avoid cross contamination
No hand or thumb access needed during surgery
Designed to be used with the TetraCord cable and TetraGraph monitor
Ulnar nerve monitoring options
The abductor digiti minimi muscle (ADM)
The adductor pollicis mucle (AP)
The first dorsal interosseous muscle (FDI)
Flexibility and simplicity when time is limited
When recording EMG from the hand, the stimulation electrodes are placed over the ulnar nerve at the wrist and the evoked EMG response is recorded from the hand muscles; typically, either the muscle at the base of the little finger (abductor digiti minimi muscle) or from the muscle at the base of the thumb, adductor pollicis muscle. TetraSens can also be placed on the FDI muscle (first dorsal interosseous).
When the hand is inaccessible, the posterial tibial nerve can be used with EMG responses recorded from the flexor hallucis brevis muscle on the foot.