ASISTA™ FAQ | BionicM

ASISTA™

FAQs

Find answers to common questions about ASISTA™ flexion and extension assistance, clinical setup, everyday mobility, device care, and product support.

ASISTA™

FAQs

Find answers to common questions about ASISTA™ flexion and extension assistance, clinical setup, everyday mobility, device care, and product support.

ASISTA™ is designed to stand apart as the only MPK on the market with both flexion and extension assistance. Unlike passive MPKs that primarily provide resistance and stability control, ASISTA™ adds targeted assistance to support smoother knee movement during daily mobility while maintaining the stability and control clinicians expect from an MPK. ASISTA™ may be a strong option for users who would benefit from added assistance but do not need the full powered-knee functions of Bio Leg®. Final device selection should be based on clinical evaluation, activity level, goals, and component compatibility.
Passive MPKs are designed to improve stability by controlling knee resistance. ASISTA™ adds targeted flexion and extension assistance to support smoother movement and more balanced prosthetic use. For appropriate users, this may help reduce compensatory patterns, improve confidence during daily mobility, and make transitions feel more natural. Individual outcomes vary, and a prosthetist should evaluate fit, alignment, training, and function over time.
No. ASISTA™ is designed to assist movement, not replace the user’s effort. The user must still actively control the prosthesis through weight shift, balance, socket control, and residual limb muscle engagement. The goal is to support smoother, more balanced movement while reducing unnecessary compensation on the sound limb and lower back. Individual results vary, and a prosthetist should evaluate fit, training, and function over time.
The perceived weight of any MPK depends on more than the number listed in the specifications. Socket fit, alignment, user strength, activity level, component selection, and training all affect how the prosthesis feels during daily use. ASISTA™ is designed to provide targeted flexion and extension assistance during functional movement, which may help the device feel more responsive for appropriate users. Final comfort and tolerance should be confirmed through clinical evaluation and trial use.
The internal lithium-ion battery charges in approximately 3 to 4 hours and provides up to 22 hours of operation, or about 6,000 steps, under typical use. Battery life varies based on activity level, settings, terrain, and use of powered functions. We recommend charging the device nightly. When the battery is low, the LED indicator and vibration alerts notify the user. Once those alerts occur, the user should move to a safe location and recharge the device.
ASISTA™ has an IP24 rating. The “2” means protection against solid objects larger than 12.5 mm, and the “4” means protection against splashing water from any direction. It can tolerate limited everyday splashes, but it is not waterproof. Do not submerge it, shower with it, or expose it to pools, oceans, saltwater, or chlorinated water. ASISTA™ is also not intended for running, jumping, high-impact sports, or heavy lifting beyond the device’s weight limit. It is intended for daily walking and functional mobility.
ASISTA™ may be appropriate for some bilateral transfemoral users, but suitability must be determined through a full clinical evaluation. Flexion and extension assistance may support smoother knee movement and confidence during daily mobility, but factors such as strength, balance, socket fit, fall risk, training environment, and user goals are especially important. ASISTA™ is not intended for high-impact sports, and stair performance should be assessed conservatively by the prosthetist.
Patient selection should be based on a clinical evaluation, user goals, activity level, build height, component compatibility, and the product’s current indications for use.

General technical boundaries to confirm include:

Amputation level: transfemoral and knee disarticulation. Consult BionicM for hip disarticulation cases.

Activity level: Intended for K2 and K3 users, depending on individual clinical goals.

Weight limit: up to 125 kg (275 lb), including the prosthesis, clothing, and carried loads.

Build height: approximately 10 in. (253.5 mm), if applicable to the selected model.

Contraindications: complete waterproofing needs, high-impact sports, use beyond the published weight limit, and osseointegrated implant systems unless explicitly cleared by BionicM.

Final indications, contraindications, and product-specific differences should be confirmed with the current IFU and BionicM technical team before prescription.
ASISTA™ has PDAC-verified coding. The verified coding package includes L5827 (electromechanical swing and stance phase control) and L5856 (microprocessor control). Because ASISTA™ does not use the powered-assist code L5859, its coding pathway may be more familiar to clinics that already bill passive MPKs. Coverage is not guaranteed and depends on the payer, plan requirements, prior authorization, and medical-necessity documentation. Clinicians should verify current coding and payer requirements before submitting a claim.
Yes. Proper bench alignment guidance is important for device performance, user comfort, and safety. BionicM technical support can provide on-site or remote alignment guidance during initial fitting, guided trials, and early patient training.
ASISTA™ is designed to integrate with standard modular prosthetic components and a wide range of commercially available prosthetic feet. Foot selection should be based on the patient’s activity level, terrain demands, alignment needs, and clinical goals. Because foot properties can affect overall performance and stability, BionicM can help clinicians confirm component compatibility during setup.
MoPro allows clinicians to complete Bluetooth setup, enter patient profile information, calibrate sensors, and adjust supported functional parameters. Depending on the device model and software version, adjustable settings may include swing assistance, sitting resistance, standing or Rest Mode support, and other setup values. Clinicians can also save adjustment records to help transfer settings from a trial unit to a permanent device. Current manuals and training materials are available through BionicM Academy.
Yes. With the prosthetic foot and shoe assembled, the CPO can perform sensor calibration in MoPro while holding the prosthesis vertically in a fully unweighted, load-free position. Follow the current setup instructions in the IFU or training materials.