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Orthopaedic, Trauma & Prosthetics
Wonderful W-OYM-02

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Wonderful Orthopaedic, Trauma & Prosthetics

Wonderful W-OYM-02

Product Code: OTAP-PLAC-2932

Grip patterns driven by muscle signals from the residual limb.

Surface electrodes sit against the skin inside the socket and read the electrical activity of muscles in the residual limb. The hand's controller interprets those signals and drives the fingers into a selected grip. Listed on Medigear.uk for UK business buyers.

Sections

Upper Limb Prostheses & Myoelectric Limbs

Categories

Orthopaedic, Trauma & Prosthetics

Condition

New

Origin

China

Seller Type

Certified Professional Seller

CE & ISO Certified

Global Shipping

Supplier: Medigear

When a muscle contracts it generates a small electrical potential, and that potential can be detected at the skin above it. Myoelectric control uses that signal. Electrodes held against the residual limb inside the socket pick up activity from selected muscle groups, typically a flexor and an extensor, and the hand's controller translates the pattern and strength of those signals into commands.

In practice this means a user opens and closes the hand by contracting muscles they still have, often the same ones that would have moved the missing hand. Signal strength can be used to vary speed or grip force, and a defined sequence, such as a co-contraction of both muscle groups, is commonly used to switch between grip patterns.

The manufacturer's catalogue entry for this reference specifies two sensors and two EMG sensor connectors, which describes a conventional two-site myoelectric arrangement. That is the control method a prosthetist would set up and train a user on, and it is what determines the fitting process: identifying viable muscle sites on the residual limb, positioning electrodes so they maintain skin contact through movement, and training the user to produce separable, repeatable signals.

Beyond control, the hand is described as having ten joints with articulated fingers and a range of selectable grip patterns. Multiple grips matter because different tasks need different hand shapes, and a hand offering a tripod, a key grip, a pinch and a power grasp covers a considerably wider set of daily tasks than one that only opens and closes. The published grip count differs between sources, so the actual number and which patterns are included should be established.

Construction is aluminium, with published weights of 500 g and 530 g in different sources. Weight matters more on an upper limb prosthesis than almost anywhere else, because the whole mass hangs from the residual limb and the socket, and a difference of tens of grams is felt across a day.

Water resistance is described but not specified. For a powered device that is a question worth pressing, since a user's expectations about hand washing, rain and household tasks depend on it.

This is a component supplied for fitting within a prosthesis. Socket design, electrode siting, control set-up, grip programming and training are the work of a qualified prosthetist and, usually, an occupational therapist, and suitability for a given patient is a clinical decision. The manufacturer, control method, grip count, weight, battery arrangement, wrist connection and certification status are provided by the seller at quotation, with UKCA or CE marking documentation, the declaration of conformity, instructions for use and warranty terms issued by the manufacturer or held by the seller.

Transradial fitting is the primary application, with the hand supplied as a component for a prosthetist to fit within a socket built to the individual.

Users with viable muscle sites on the residual limb are candidates for myoelectric control, with site assessment forming part of the fitting process.

Tasks needing different hand shapes are served by selectable grip patterns, since a tripod, a pinch and a power grasp each suit different objects.

Daily activities including grasping, holding and manipulating objects are the intended use case for a powered multi-grip hand.

Users progressing from body-powered or cosmetic prostheses require control training, usually delivered with an occupational therapist.

Services fitting powered devices need battery arrangement, charging and runtime established, since these govern daily use.

Clinics need the configuration software identified and its availability in this market confirmed before committing to the platform.

Control From Muscles the User Still Has

Electrodes read activity from selected muscle groups in the residual limb, so the hand is driven by intention expressed the way it always was.

Two-Site Control Set to the Individual

Two EMG sensor connectors support a conventional flexor and extensor arrangement, positioned by the prosthetist to the sites that work best.

Speed and Force From Signal Strength

Myoelectric systems commonly use the strength of a contraction to vary how fast or how firmly the hand closes.

Several Grips for Several Tasks

Selectable grip patterns cover a wider set of daily tasks than a hand that only opens and closes.

Articulated Fingers Across Ten Joints

Finger articulation allows the hand to conform to objects of different shapes.

Aluminium Construction

Keeping mass down on a device whose weight is carried entirely by the residual limb and socket.

Fitting Support Established Early

Electrode siting, socket requirements and control training needs are established before the device is committed to.

Battery Arrangement Documented

Charging method, runtime and battery condition are provided by the seller, since they govern daily use.

Certification Evidenced for This Device

A declaration of conformity specific to the product is requested rather than a claim about the wider range.

Published Figures Reconciled

Weight, grip count and control method are settled in writing before the product is described to a buyer.

Supply and Documentation Arranged

Medigear.uk can arrange supply, documentation and the provision of spares and consumables.

Externally Powered Myoelectric Prosthetic Hand

For upper limb fitting, controlled by muscle activity read at the skin.

Item Reference: W-OYM-02

To be confirmed against the manufacturer's marking.

Manufacturer

Shijiazhuang Wonderfu, to be confirmed at quotation.

Control Method

Surface myoelectric control through two EMG sensor connectors, per the manufacturer's catalogue entry.

Sensors

Two, per the manufacturer's catalogue entry.

Grip Patterns

Published as 18 grips and as 23 gestures in different sources, to be confirmed.

Joint Count

Published as 10 joints with articulated fingers.

Weight

Published as 500 g and as 530 g in different sources, to be confirmed.

Material

Aluminium.

Water Resistance

Described as water-resistant, with the rating and permitted exposure to be confirmed.

Donning

Described by the manufacturer as an easy-don structure.

Battery, Charging and Runtime

Confirmed at quotation.

Wrist Connection

Type and compatibility confirmed at quotation.

Handing and Sizes

Left and right handing and available sizes confirmed at quotation.

Electrode Type and Socket Requirements

Confirmed at quotation for socket design and fitting.

Configuration Software and Training Support

Confirmed at quotation, including availability in this market.

Amputation Levels Indicated

Confirmed at quotation against the instructions for use.

UKCA or CE Marking and Declaration of Conformity

Requested from the seller at quotation, specific to this product.

Instructions for Use

Provided by the seller at quotation, and required before fitting.

Warranty Terms

Set by the seller at quotation.

The W-OYM-02 is an externally powered multi-grip myoelectric prosthetic hand. When a muscle contracts it produces a small electrical potential detectable at the skin, and myoelectric control uses exactly that: electrodes held against the residual limb inside the socket pick up activity from selected muscle groups, and the controller translates the pattern and strength of those signals into movement. The manufacturer's catalogue entry specifies two sensors and two EMG sensor connectors, describing a conventional two-site arrangement, which is what a prosthetist sets up and trains a user on. Around the control sit articulated fingers across ten joints, a range of selectable grip patterns covering different task shapes, and aluminium construction that keeps mass down on a device carried entirely by the residual limb. Socket design, electrode siting, control set-up and training are the work of a qualified prosthetist and occupational therapist, and suitability is a clinical decision. Weight, grip count, control method and certification status all differ or are hedged across published sources, and each should be settled in writing before this device is described to a buyer. Those, along with the battery arrangement and wrist connection, are provided by the seller at quotation with UKCA or CE documentation and instructions for use. Medigear.uk lists the hand for UK business buyers and can arrange supply, documentation and the provision of spares and consumables. Enquire for a written quotation.

FAQ

Frequently Asked Questions

Everything buyers need to know about sourcing medical equipment through MediGear.

It is an externally powered multi-grip myoelectric prosthetic hand, supplied as a component for fitting within an upper limb prosthesis by a qualified clinician.

The manufacturer's catalogue entry specifies two sensors and two EMG sensor connectors, which describes surface myoelectric control: electrodes read muscle activity at the skin and the controller acts on it.

One published source describes it that way, but the manufacturer's own specification lists EMG sensor connectors, which is surface muscle signal control rather than any form of neural interface. The control method should be confirmed in writing before any claim is made to a user.

On two-site myoelectric systems a defined signal, commonly a co-contraction of both muscle groups, is used to change grip pattern. The method for this hand is confirmed at quotation.

Published sources give 18 grips and 23 gestures. The actual number and which patterns are included should be established from the manufacturer.

Published as 500 g in one source and 530 g in another. Weight matters on an upper limb device because the mass is carried by the residual limb.

Aluminium, as published by the manufacturer.

It is described as water-resistant, but no rating is published. The permitted exposure should be confirmed before a user is advised.

Identifying viable muscle sites, designing a socket that holds electrodes in skin contact through movement, setting up the control and training the user to produce separable, repeatable signals.

The published claim refers to consistency with the company's other products rather than to this device, so a declaration of conformity specific to this product should be requested.

A qualified prosthetist, usually working with an occupational therapist for control training.