Suitable as a general purpose electrical nerve or muscle stimulator for peripheral stimulation in human research studies, the DS7R provides up to 999mA constant current high voltage pulses of brief duration for trans-cutaneous stimulation during investigation of the electrical activity of nerve and muscle tissue. The DS7R is specifically recommended for human research applications where its high voltage, high current and flexible pulse duration capabilities permit stimulation of large muscle groups or deep nerves/nerve roots.
As the DS7R is a new product there are only three publications at this time, but this list will be extended as more work is published.
Brownstein, C. G., Espeit, L., Royer, N., & … (2021). Reductions in motoneuron excitability during sustained isometric contractions are dependent on stimulus and contraction intensity. Journal of Neurophysiology. Retrieved from https://doi.org/10.1152/jn.00070.2021
Varesco, G., Royer, N., Singh, B., Parent, A., Féasson, L., Lapole, T., … Rozand, V. (2021). Reliability and agreement of a dynamic quadriceps incremental test for the assessment of neuromuscular function. Journal of Electromyography and Kinesiology, 56. https://doi.org/10.1016/j.jelekin.2020.102503
Neige, C., Grosprêtre, S., Martin, A., & Lebon, F. (2020). Influence of voluntary contraction level, test stimulus intensity and normalization procedures on the evaluation of short-interval intracortical inhibition. Brain Sciences, 10(7), 1–16. https://doi.org/10.3390/brainsci10070433
Last updated 6th April 2021
- Mains (Power) lead
- Operator’s Manual
- D185-HB4 Output Extension Cable
- D185-OC1 Output Connection Plugs
- DG2A Train/Delay Generator
- DS7A-HS1 Hand-switch for remote triggering
- Electrodes & Accessories
The DS7R has the same maximum current output as the DS7AH, but the more flexible pulse duration settings of the DS7A (50µs to 2ms), making it more versatile than the DS7AH. However, because the maximum energy that the stimulator can deliver is in excess of 50mJ, which exceeds the EN60601-2-40 standard for evoked potential stimulators, we are not able to give the DS7R a medical CE mark against that standard. Instead, the DS7R is offered for human research applications, where more flexible pulse parameter settings may be required.
2. I need to use a medically approved stimulator, so is it possible to supply a DS7AH with the pulse restriction removed?
No, in order for the DS7AH to be granted medical device status, it is necessary for us to restrict the pulse energy to a maximum of 50mJ. If you require stimulation pulses in excess of 100mA with durations of >200µs, the DS7R is the only device we can offer, but while safe for human research use, it is not a medical device.
No, the DS7R does not have this capability, but our new DS8R stimulator does offer external control via Windows PC software, an embedded API or an analogue voltage input (to define pulse amplitude).