STIMPOD NMS450 Peripheral Nerve Stimulator
(NMBA Monitoring / Nerve Location)
The STIMPOD NMS450 Peripheral Nerve Stimulator is designed to provide dual functionality with both precision nerve location and Neuromuscular Blocking Agent monitoring. The NMS450 has a unique three-dimensional accelerometer to accurately and continuously provide TOF, DB and PTC ratio's during the entire procedure.
The STIMPOD NMS450 Nerve Stimulator includes a Tri-axial accelerometer which provides real time feedback of the strength of contraction of the affected limb (Train Of Four, Double Burst and Post Tetanic Count modes only). The strength of each measured contraction is displayed graphically and the relevant ratios are calculated and also displayed.
The fine movement diffences that can be detected by utilizing accelerometry offers major advantages over gauging contraction strength visually or tactilely.
Tri-axial accelerometry calculates the movement vector of the contraction in three dimensions. This negates the need for calibration as is the case with one-dimensional accelerometers, and reduces the setup time of the procedure.
Combined Nerve Mapping and Nerve Location:
Auto sensing technology provides a solution for simultaneous nerve mapping and nerve location. The Stimpod monitors whether the mapping probe or needle touches the patient and adjusts the current range accordingly, ensuring quick and precise nerve location.
This technology provides a cost effective alternative to ultrasound techniques for determining anatomical deviations prior to needle insertion. The technique reduces the time of the procedure and provides favourable patient comfort and safety.
Nerve Mapping Probe:
The Stimpod Nerve Mapping Probe was designed to enable transcutaneous nerve mapping at higher currents (to a maximum of 20mA), whilst the tip offers a contact surface small enough to ensure effective discrimination.
Deeper peripheral nerves require higher current to be recruited by transcutaneous stimulation. The Stimpod sensing technology and Nerve Mapping Probe designs facilitate larger currents, thus increasing the percentage of peripheral nerves that can be targeted.*
Charge Transfer Waveform:
The STIMPOD displays real time graphical representation of the actual waveform delivered.
The displayed waveform serves as a quick reference for excessive impedance (> 20kOhm) in the circuit. The waveform will indicate if the pulse is delivered according to the settings. If the waveform is not square, this will immediately indicate excessive impedance in the circuit and all elements in the circuit i.e. ecg electrodes and/or skin condition, needs to be re-assessed before nerve location can be successfully completed.*
Visual and audible feedback is given when the target current- and pulse width ranges are reached indicating probable nerve proximity.
The Proximity Indicator provides a safety mechanism which prevents the user from getting confused with the current settings at different pulse widths. Prior to performing your peripheral nerve block, this unique indicator will provide indication of nerve proximity.
Non-Linear Current Adjustment:
In this current adjustment mode the user can pre-program 20 different current and pulse width settings.
When adjusting the adjustment wheel the STIMPOD Nerve Stimulator will only scroll through the pre-programmed Current and pulse width settings. (The default settings are calculated to facilitate the non-linear nature of the current intensity versus the distance from the nerve.)*
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