BTS FREEEMG represents a generation leap in diagnostic device technology for surface EMG analysis during the motion.

Employing entirely on wireless technologies, BTS FREEEMG is the first electromyography unit in the world using 16 miniaturized probes with active electrodes weighing just 8 grams for signal acquisition and transmission. The probes amplify the EMG signals, digitise them and communicate with a receiving unit, that is compact and light (240 grams), which can be worn by the patient, left on the table or held by the doctor. The complete absence of wiring allows not only for quick preparation of the patient but inconvenience is also minimised because the patient can move around freely and comfortably. The substantially reduced size and weight of the variable geometry probes allows them to be used on any body segment for all types of movement (walking, running, jumping, etc) on a variety of subjects without affecting in any way the motor pattern of the subject. Several hours of data can be recorded thanks to the use of environmentally friendly rechargeable batteries.BTS FREEEMG is supplied with either BTS Myolab or BTS EMGenius, the powerful software packages for EMG signal monitoring, processing and reporting.

Main features

Main features:
The Most Advanced Surface EMG Unit in the World
BTS FREEEMG uses the best technology which is available today.
Totally wireless, it uses probes with active and variable geometry electrodes, weighing just 8 grams.

Quicker and More Accurate Analysis
The total absence of cables makes for a quick patient setup. The probes are attached directly to the pre-gelled electrodes and being lightweight they do not require any additional fixing such as adhesive tape. The patient can move around freely.

Powerful and Comprehensive
16 electromyography channels, 2 foot switch channels covering up to 8 contact areas, and electrogoniometers or accelerometer probe.

Easy to Use
The system is set up either from the by the workstation or from the mobile receiving unit, which is equipped with a high-resolution touch-screen display and an intuitive graphical interface.

Reliable
The technology used, the sampling rate of up to 1 KHz frequency for the surface-mounted electrodes and up to 4 KHz for finewire elecrodes (Options) and the 16 bit resolution for each channel, ensure that the acquired signal has low noise and is free from movement artefacts. Data is stored in an onboard solid-state memory.

Prolonged Battery Life
More than 3 h of non-stop acquisition, by placing the probes in Stand By mode, between acquisitions, it is possible to perform a whole day’s recording. Easy and quick recharging by clipping onto a proprietary battery charger.

Signal Range
Up to 30 meters for the transmission between the probes and the receiving mobile unit in free space; up to 350 meters for the data transfer between the mobile unit and the workstation.

Interoperability
Can interoperate with movement analysis, posturometry and stabilometry systems.
Can be integrated with Isokinetic machines (BIODEX, CYBEX and CON-TREX) to evaluate the real muscle activity during training and planned testing activities.

Specifications

Specifications:
Wireless Probes
Surface electrodes: variable geometry electrodes with mounting clip
16-bit resolution - acquisition frequency up to 1KHz
Data transmission wireless IEEE802.15.4 (probes - receiving unit)
Battery rechargeable with proprietary charger (clip connector)
Autonomy: 3h battery life with non-stop recording.
Energy Saving with Stand-by mode
Range probes - receiving unit: up to 30 meters in free space
(it can decrease to 15/20m in the presence of obstacles)
Memory: on board solid state memory system
Status LED: acquisition/stand-by mode and low battery
Weight and size: 8 grams including battery
23.8 x 37 x 10mm main electrode Ø 16.5 x 10mm satellite electrode

Mobile Receiving Unit
EMG channels: up to 16 wireless probes
Data transmission: wireless WiFi standard 802.11b (receiving unit – workstation)
Display 4” VGA touch-screen
Recording duration: up to 9 hours with a single battery
Range receiving unit-workstation: up to 30 meters indoor – up to 350 meters outdoors

Software BTS Myolab/BTS EMGenius
Data acquisition, display and analysis
Oscilloscope for the real-time viewing of the signals
Database for data storage
Synchronised display of electromyographic signals and video signals from up to four BTS VIXTA cameras
Analysis of localized myolelectric muscular fatigue phenomena (BTS Myolab)
Protocol for the functional evaluation of cycle movements (BTS EMGenius)

Software

BTS Myolab with its several analysis tools is the most flexible solution providing advanced analysis, including the measurement of localized muscle fatigue.
With BTS Myolab BTS FREEEMG can be used in numerous fields of application such as research, sports, occupational medicine, gnatology, neurology and orthopaedics.

BTS EMGenius includes a protocol for the functional evaluation of cycling movements (such as gait) and, in combination with switches, can automatically identify events and generate normalized cycle data.
With BTS EMGenius, BTS FREEEMG becomes the most advanced diagnostic tool available today for clinical laboratories that need to evaluate neurological and orthopaedic pathologies, pharmacological therapies, motor deficit progression and to carry out rehabilitative follow-ups.

Options

Options:
BTS Workstation
Desktop or laptop PC dedicated to the processing of the electromyography signal and to wireless communications with the receiving unit.

Wireless Foot Switch Probes
Independent FSR sensors for the automatic identification of the gait phases
Up to 4 individual on-off sensors for each Foot Switch probe (8 in all).

BTS FREEEMG & ISOKINETIC configuration
for integration with isokinetic machines: