OUR PRODUCTS

AFU is power supplied from the stimulator battery via audio cable, but it can also be supplied externally with coin batteries. It can be used with any other stimulator if the following limits are met:

• pulse amplitude: 0-170mA,
• pulse width (PW): 50-1000us,
• frequency (F): 1-500Hz,
• where PW * F ≤ 0.025.

AFU mimics the natural activation of a muscle to reduce FES-induced muscle fatigue. The asynchronous stimulation of different branches of a nerve innervating the same muscle or synergistic muscles via several electrodes at a lower frequency (≈10-15Hz) results with the fused contraction with the comparable force to the one generated with single large electrode activated at higher frequency (≈40–50 Hz); yet, postpones the muscle fatigue for several times. This phenomenon was confirmed in several clinical studies (see publications).

Publications:

• Popović-Maneski L, Malešević N, Savić A, Keller T, Popović DB. Surface distributed low-frequency asynchronous stimulation (sDLFAS) delays fatigue of stimulated muscles. Muscle & Nerve, 2013, Vol 48(6), pp.930-937, DOI: 10.1002/mus.23840.
• Malešević, L. Popović, L. Schwirtlich and D.B. Popović, Distributed low-frequency functional electrical stimulation delays muscle fatigue compared to conventional stimulation, Muscle and Nerve, 2010, pp. 42(4): 556-562, DOI 10.1002/mus.21736.
• Popović, L.Z., and Malešević, N.M. "Muscle fatigue of quadriceps in paraplegics: comparison between single vs. multi-pad electrode surface stimulation." In 2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2009, pp. 6785-6788.

Control is implemented via the RS485 communication protocol (Baud rate 115200). In this case, MOTIMOVE acts as a slave device with Bluetooth disabled.

The stimulator will respond to a set of commands sent in 40 bytes, as shown below:

• 5 bytes 0xFF,0x00,0x25,0x00,0x00 (message start - 1 byte, message length - 2 bytes, 2 dummy bytes- 0x0A0B is for no delay between pulses on adjacent channels). All values after first 5 bytes are to be sent in a lower nibble
• 3 bytes for the period in ms (defined by the master controller). Pulses on consecutive channels are delayed for T/8, where T is the period of stimulation.
• 4 bytes for power modulation (max value 10 = 100%)
• 4 bytes for pulse width (max value 1000µs)
• 8 x 2 bytes - stimulation value per channel (max value 170mA)
• 2 bytes for demultiplexer channel selection (0x0F,0x0F if demultiplexer is not used)
• 4 bytes not used
• 1 byte for turning on high voltage (0x01 - on, 0x00 - off, 0x02 – do not change)
• 1 byte for checksum

The module has 32-pin interface for external control with:

• digital inputs for pulse duration (50-1000us),
• SPI for pulse intensity 0-170mA in steps of 1mA,
• Digital inputs for control of SSD relays for instantaneous, complete discharge of outputs, and
• digital outputs for electrode detection.

Pulses can be generated at the same time on all channels (max 25µs delay between channels).

An array with conductive pads can be customized in size and shape (you just need a pair of scissors).

No leads. Pads are activated by the snap contact extension for the stimulation cable.

Thin rubber based to take form of the any part of the body. Flexible and stretchable.

The perforated hypoallergic hydrogel is contact with the skin. Perforation increases selectivity.

Compatible with any stimulator.

Publications:

• Popovic-Maneski L., Surface array electrodes for interfacing motor systems: A review and new solutions, Proc. IcETRAN, June 12-16 2016, Zlatibor, Serbia, MEI1.4
• Popović Maneski L., Topalović I., Jovičić N., Dedijer S., Konstantinović Lj., Popović D.B., "Stimulation map for control of functional grasp based on multi-channel EMG recordings", Medical Engineering & Physics, 2016, Vol. 38(11), pp. 1251-1259, http://dx.doi.org/10.1016/j.medengphy.2016.06.004
• Popović-Maneski L, Kostić M, Bijelić G, Keller T, Mitrović S, Konstantinović Lj, Popović DB. Multi-pad electrode for effective grasping: design. IEEE Trans Neur Syst & Rehab Eng, 2013, Vol 21(4), pp. 648-654, DOI: 10.1109/TNSRE.2013.2239662.

Supports stimulation of Gluteus, Quadriceps, Hamstring, Tibialis anterior and Gastrocnemius muscles.

Easy donning with soft Velcro tape fastening and medical push-pull connectors. Convenient to don the bed or a wheelchair.

Multiuse hypoallergic hydrogel pads or dry electrodes.

Washable at up to 60 degrees.

Toilet friendly, with an open area on the back side.

Sizes: S, M, L

Wireless recording of motion in the sagittal plane and 2-channel EMG recordings.

Play online games with threshold control from 1 or 2 channels of EMG or joint angle.

Automatic assessment the type and strength of spasticity based on pendulum test.

Publications:

• Popović Maneski, L., Topalović, I., Jovičić, N., Dedijer, S., Konstantinović, L., Popović, D.B. "Stimulation map for control of functional grasp based on multi-channel EMG recordings", Medical Engineering & Physics. 38 (2016), pp. 1251-1259. doi:10.1016/j.medengphy.2016.06.004
• Popović Maneski, L., Aleksić, A., Čobeljić, R., Bajd, T., Popović, DB. A new method and instrumentation for analyzing spasticity, IETI Trans on Ergonomics and Safety, 2017, 1(1): 12-27, ISBN 978-1-4503-5287-1
• Popović-Maneski, L., Aleksić, A., Metani, A., Bergeron, V., Čobeljić, R., Popović, D.B. „Assessment of spasticity by a pendulum test in SCI patients who exercise FES cycling or receive only conventional therapy.“ IEEE Trans on Neural Systems and Rehab Eng,.2017, in press (http://ieeexplore.ieee.org/document/8101553/)