Long-Term Stability of the Glide Control Strategy

DEVICE

Glide Control System

Glide is a commercially developed directional myoelectric control strategy from Infinite Biomedical Technologies (IBT) that sits between classic Direct Control (DC) and modern Pattern Recognition (PR). Instead of requiring an isolated on/off muscle signal for each function (e.g., DC) or training a complex classifier on many gestures (e.g., PR), Glide uses the relative activity across 2-8 EMG electrodes to move a virtual cursor on a 2-D "Glide map." The map is divided into adjustable sectors ("slices"), and each slice is assigned a prosthetic movement (e.g., hand open/close, wrist rotation, elbow flexion). Moving the cursor into a slice actuates that movement.

DEVICE

Pattern Recognition System

Pattern recognition (PR)-based myoelectric control is a data-driven approach that allows a user to control multiple prosthetic functions using natural muscle activation patterns rather than discrete, isolated signals. Instead of mapping one muscle to one motion (as in conventional Direct Control), PR systems record the spatial and temporal pattern of EMG activity from multiple sites on the residual limb and use machine learning algorithms to classify which intended movement the user is trying to make.

Daily Mean Number of Control Adjustment Sessions (DMNCAS)

Time frame: Weekly, From Prosthesis Delivery (Day 0) to the End of Treatment (Day 168)

DMNCAS quantifies the number of times a prosthesis user needs to adjust their control strategy to maintain performance. For a PR system, a control adjustment refers to a calibration (or recalibration) of one or more prosthesis movements, while for the Glide control strategy, a control adjustment refers to a change in the Glide map configuration (e.g., electrode gains, slice geometries, assigned movements, etc.). A control adjustment session is then a period of time devoted to performing one or more control adjustments. The number and duration of control adjustment sessions will be recorded in a study diary.

Number of Follow-Up Clinical Interventions (NFCI)

Time frame: Weekly, From Prosthesis Delivery (Day 0) to End of Treatment (Day 168)

NFCI reports the number of times the prosthesis user requests the aid of a clinician to resolve an issue with their prescribed control strategy. NFCI refers to clinical interventions (both remote and in-person) that occur post-prosthesis delivery, the number and duration of which will be recorded in a study diary. Diary entries will be verified through a retrospective chart review in collaboration with Medical Center Orthotics \& Prosthetics.

What is a clinical trial?

A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.

Is it safe to participate?

Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.

Will I be compensated?

Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.

Will I receive a placebo instead of treatment?

When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.

Can I leave a trial if I change my mind?

Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.

How long does a clinical trial last?

Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.