BEAR-A Series Lower Limb Rehabilitation Robot

The BEAR-A Series is MileBot’s passive-mode lower limb rehabilitation exoskeleton designed for adult patients with significant locomotor dysfunction. Unlike the hybrid H-series, the A-series focuses exclusively on robot-guided movement for patients in early recovery stages who cannot yet contribute voluntary effort.

Product Overview

Positioned as an entry-level rehabilitation exoskeleton, the BEAR-A Series addresses patients who require full robotic guidance during gait training. The system provides predetermined movement patterns that guide the patient’s legs through walking motions without requiring voluntary muscle activation.

The A-series shares the same compliant actuator foundation as the H-series, meaning movement remains smooth and force-controlled even in passive mode. This differs from rigid motor systems where passive movement can feel mechanical or jerky to patients.

The standing frame design provides full weight support, allowing patients who cannot bear weight through their legs to still experience upright positioning and repetitive stepping patterns—interventions that research suggests can maintain joint mobility and potentially support motor recovery even in severely impaired patients.

Key Features

Passive Training Focus: Optimized for patients who cannot initiate voluntary movement, the A-series guides legs through preset gait patterns without requiring patient effort.

Compliant Actuator Technology: Despite operating in passive mode, the compliant actuator system provides smooth, force-limited movement that reduces risk of joint strain.

Integrated Standing Frame: Fall-protection frame with harness enables safe upright training even for non-ambulatory patients.

Multiple Gait Programs: Continuous walking mode, single-step mode, and leg swing mode offer variety in training protocols.

Height Adjustability: Exoskeleton sizing adjusts for patients 155-190 cm in height.

Technical Specifications

MileBot’s BEAR-A Series is an NMPA Class II passive-mode lower limb exoskeleton for patients 155–190 cm, offering continuous walking, single-step, and leg swing programs within a standing frame harness system.

Clinical Applications

The BEAR-A Series targets patients in early-stage rehabilitation or those with severe motor impairment:

• Acute Stroke: Early mobilization within days of stroke onset
• Complete Spinal Cord Injury: Maintaining joint range of motion and providing sensory input
• Severe Hemiparesis: Patients scoring 0-2 on manual muscle testing who cannot initiate movement

The passive nature of the A-series makes it appropriate for patients who might be contraindicated for active training due to fatigue, cognitive impairment, or lack of voluntary motor control. As patients recover function, they may transition to the H-series for active-assist training.

Regulatory Status

Frequently Asked Questions

When should a patient use BEAR-A versus BEAR-H?

BEAR-A is appropriate for early-stage patients who cannot contribute voluntary movement or who have contraindications to active training. Once patients demonstrate some voluntary motor control, they typically progress to BEAR-H for active-assist protocols.

Can BEAR-A help patients who cannot stand at all?

Yes. The standing frame provides full weight support through the harness system. Patients do not need independent standing ability to use the BEAR-A Series.

What is the benefit of passive training if the patient isn’t actively participating?

Passive movement maintains joint range of motion, provides proprioceptive input to the nervous system, enables early upright positioning which has cardiovascular and psychological benefits, and may prime neural pathways for later active recovery.