Weare_ Vulcan

When a patient lifts or repositions a prosthetic arm, their muscles naturally contract slightly to stabilize the limb. These postural contractions generate EMG signals and to a conventional myoelectric system, they can look identical to an intentional command. In the upperlimb prosthetic industry, this is known as unintended activation. Why unintended activation happens As the patient lifts or positions the prosthetic arm, the muscles naturally contract slightly to stabilize the limb. This postural muscle activity generates EMG signals that may resemble intentional commands. Conventional myoelectric systems typically respond to signal amplitude alone if the amplitude of one channel is simply higher than the other, the hand will automatically open or close. Consequently, they cannot reliably distinguish between: Research has shown that changes in limb position can alter EMG signal characteristics, increasing the risk of false triggers in traditional control systems. The result: sudden, accidental release of objects during everyday activities such as reaching or adjusting posture. In the upper-limb prosthetic industry, sudden accidental release of a held object due to postural muscle signals is called unintended activation – one of the most reported frustrations among prosthetic users in daily life. Vulcan Motion Tracking The Vulcan Motion Tracking system, integrated into the Myoband sensor band, combines EMG sensing with inertial motion data (IMU) to create a context-aware control model. By continuously monitoring arm angle, movement state, and muscle activation thresholds, the system can interpret the patient’s intent more accurately. For example: Scenario System Response Arm is raised + EMG increases slightly Recognized as postural stabilization → no command triggered Arm is stable + EMG rises above threshold Recognized as intentional command → prosthetic hand activates All sensor inputs are time-synchronized and processed through a signal-fusion engine. This allows the control logic to respond differently depending on motion context, velocity, or inferred muscle fatigue without introducing noticeable delay. This level of integration remains challenging for many conventional systems, as it requires advanced algorithms, real-time processing capability, and a wearable sensing architecture. Benefits for patients and clinicians By combining motion tracking with EMG analysis, the Vulcan system provides several practical advantages for both patients and clinicians. 1. Lower risk of unintended object release One of the most common frustrations reported by prosthetic users is accidentally dropping or releasing objects during everyday tasks, particularly when reaching overhead, adjusting posture, or shifting arm position. Because the Vulcan system continuously monitors both muscle activity and arm movement, it can distinguish between a postural contraction and a deliberate command. This significantly reduces the likelihood of false triggers, helping patients handle cups, tools, or fragile items with greater confidence throughout the day. 2. More natural interaction Conventional systems react to muscle signals in isolation, without considering what the arm is actually doing at that moment. The Vulcan Motion Tracking system adds spatial context to every signal — meaning the prosthetic hand responds based on what the patient is likely trying to do, not just what their muscles are momentarily producing. The result is a control experience that feels more intuitive and less mentally demanding, especially during complex or multi-step activities. 3. Objective rehabilitation data The Vulcan app records motion and EMG signal metrics during use, giving clinicians access to real, quantifiable data between appointments. Instead of relying solely on patient recall or in-clinic observation, therapists can review how the prosthesis is being used in daily life — identifying patterns, tracking progress over time, and making more informed adjustments to training plans or device settings. This supports a more data-driven approach to rehabilitation and outcome measurement. 4. Improved long-term usability Residual limb volume and muscle condition naturally change over time due to weight fluctuation, activity level, socket fit, or the progression of rehabilitation. Static threshold systems can become less reliable as these changes occur. The Vulcan system uses adaptive thresholds and continuous movement awareness to maintain consistent performance as the patient’s limb evolves, reducing the need for frequent recalibration and supporting more stable, long-term prosthetic use. Faster setup. Better outcomes. Vulcan’s motion aware control architecture represents a new generation of AI and data-driven upper-limb solutions — designed for real clinical workflows and real patient lives. Learn more about Vulcan →

A primary consideration in upper-limb rehabilitation is determining a patient’s suitability for a myoelectric prosthesis. Traditionally, successful myoelectric control requires a residual limb with specific characteristics, particularly strong and isolated electromyographic (EMG) signals. The Vulcan Myoband provides an alternative approach to myoelectric control. By utilizing a flexible, wireless Vulcan Myoband instead of standard rigid socket electrodes, the system is designed to accommodate a broader range of anatomical conditions and signal presentations. The Vulcan system is applicable for multiple upper-limb amputation levels. It is currently indicated for patients undergoing rehabilitation for: Clinical Note: The Vulcan Myoband and prosthetic hand system are not currently indicated for partial hand or individual finger amputations. Residual Limb and EMG Signal Considerations  In patients with complex residual limb conditions, identifying stable signal locations can be difficult and may require repeated calibration. Myoband addresses this challenge through high-sensitivity EMG sensors distributed around the forearm, as well as a smart algorithm developed by Vulcan, allowing the system to capture muscle activity from several channels simultaneously and reliably. This approach can improve signal detection reliability in patients with less predictable signal patterns, allowing it to adapt to various anatomical presentations where traditional single-site electrodes often fail. 1. Scar Tissue and Skin Grafts Scar tissue typically exhibits high electrical resistance, which can attenuate EMG signals and impede detection by standard single-point sensors. The Vulcan Control Solution: If localized scar tissue causes signal attenuation at one site, the algorithm relies on data acquired from adjacent sensors to capture the overall muscle activation pattern. 2. Bone Overgrowth and Irregular Contours Rigid electrodes require flat, continuous contact with the skin. Irregular stump shapes or bony protrusions can cause pressure points, discomfort, and inconsistent sensor contact (motion artifacts). The Vulcan Control Solution: Vulcan Myoband uses a flexible, modular elastic structure. This design allows the sensors to conform to the limb’s natural contours, maintaining contact without applying localized pressure on prominent bones. 3. Bilateral Amputations Clinical Case 3 – Bilateral Amputations [ Watch the video here] Extreme difficulty for the patient to don/doff devices and perform daily calibrations independently. The Vulcan Solution: The band design allows patients to slide the device on using their other stump. Software profiles are saved per limb, making synchronized bilateral control intuitive. 4. Osseointegration  Requires a system that doesn’t interfere with the percutaneous implant site while maintaining high-fidelity control. The Vulcan Solution: Since the bone is fixed, muscle movement is more predictable. Myoband captures these stable muscle contractions non-invasively, providing a high-speed interface that matches the direct-to-bone stability. For clinicians and orthotists, utilizing Vulcan Myoband approach simplifies the socket fabrication process by removing embedded wiring. Functionally, it provides a viable control option for patients whose signal patterns or anatomical features previously excluded them from using standard myoelectric systems. For more information regarding system specifications, user manuals, or to view additional case studies demonstrating the Vulcan Myoband in various clinical scenarios, please visit our resource center. Click here

The Vulcan Myoband is a wearable biosignal sensor designed to detect electromyographic (EMG) signals generated when muscles contract. These signals are then used to control a myoelectric or bionic prosthetic hand through Bluetooth Low Energy (BLE). In simple terms, the Myoband acts as the control interface between the patient’s muscles and the prosthetic hand, translating muscle activity into movement. Unlike traditional prosthetic systems that place electrodes inside the socket, the Myoband is worn as a sensor band around the upper arm, typically over the biceps. This design allows the system to capture muscle signals without relying on precise electrode placement within the prosthetic socket. How Does It Work for Patients? 1. Detecting Muscle Signals When a patient attempts to move their missing hand, the remaining muscles in the arm still generate EMG signals. The Myoband contains EMG sensors + IMU sensor positioned around the arm to detect muscle activity from different areas. This multi-point sensing approach helps the system capture weak or complex signals that may be difficult to detect with conventional electrode setups. Watch Video: See How the Vulcan Hand Calibrates in Under 1 Minute! 2. Processing the Biosignals The Vulcan system uses a threshold-based signal detection method. During calibration which typically takes less than one minute, the system analyzes the patient’s EMG signals and automatically determines two key levels: the muscle contraction threshold and the muscle relaxation threshold.  The Myoband’s built-in system automatically measures and analyzes patient EMG signals, calculating and establishing activation thresholds that adapt to each individual’s muscle strength, even in patients with weak or variable EMG signals. 3. Translating Signals Into Movement After calibration, the Vulcan prosthetic hand responds directly to the patient’s muscle activity through BLE communication. In the Vulcan system, the Myoband functions as the signal acquisition and processing unit, while the prosthetic hand acts as the execution device. After muscle activity is detected and translated into control commands, the Myoband sends these commands wirelessly to the prosthetic hand in real time. For example: Depending on the configuration, the control logic can also be reversed. This wireless control solution removes the need for complex internal wiring inside the prosthetic socket. As a result, clinicians have greater flexibility during socket fabrication, while patients benefit from a lighter system, easier maintenance, and more stable signal transmission during daily movement. Contact our clinical team today to see if the Vulcan system is right for you. Click Here How to Wear the Myoband Proper Placement Place the Myoband around the upper arm or forearm, positioning the sensors over the muscles used for control. Adjusting the Strap Wrap the adjustable strap around the arm and secure it comfortably. The band should fit snugly but not too tight. Skin Preparation For optimal signal detection, make sure the skin is clean and dry before wearing the Myoband. Avoid lotions or oils that may affect signal quality. Electrode Preparation Before use, ensure the electrode surfaces are clean. Wipe them with a dry, lint-free cloth to remove dust or residue that could interfere with signal detection. [Watch the User Video Here]

After an upper-limb amputation, receiving a myoelectric prosthetic hand can take one to six months, even after insurance approval or out-of-pocket agreement. The fitting process alone typically requires three to four clinic visits, depending on the complexity of the limb condition and the fabrication workflow. Yet despite this time and effort, myoelectric fittings still fail in many clinics. So why does fitting still take so long? Several factors commonly slow down the process: The EMG Signal Challenge Myoelectric prosthetic control relies on electromyographic (EMG) signals, which are generated when residual muscles contract. After an upperlimb amputation, the remaining muscles in the forearm or upper arm can still produce these signals when a patient attempts to move the missing limb. However, the characteristics of these signals vary widely from patient to patient. The biology of the residual limb and the original surgical procedure play a major role in determining how usable these signals are for prosthetic control. Several factors influence EMG signal quality, including: In addition, surgical reconstruction can alter the natural structure of the muscle system. Depending on the procedure, residual muscles may be reattached to bone or tendon, which can change how neuromuscular signals are generated and transmitted. As a result, EMG signals in an amputated limb often differ from those in an intact limb. They typically show: Surface EMG sensors must detect these signals through several biological layers, including muscle tissue, connective tissue, subcutaneous fat, and skin, which further attenuate and filter the electrical activity. Because of these physiological factors, sensor placement becomes critical. Clinicians must identify the most active muscle regions and optimize electrode placement based on signal amplitude, soft tissue thickness, and stability within the prosthetic socket. Why Electrode Placement Is So Difficult Most traditional myoelectric systems requiring electrodes to be placed on two opposing muscle groups. For reliable detection, electrodes must be positioned precisely on the muscle belly and aligned with the direction of the muscle fibers. During fitting, prosthetists often ask patients to perform repeated muscle contractions while adjusting electrode locations to find signals that are both strong and distinguishable. In practice, this process can involve extensive repositioning and testing, sometimes referred to clinically as “myosite hunting.” Even when optimal placement is achieved in the clinic, maintaining stable signals in daily life remains challenging. Factors such as electrode displacement, socket pressure changes, sweat, and natural biological changes in the residual limb can all affect signal quality. Socket Limitations In conventional prosthetic systems, electrodes are typically embedded inside the socket, which creates additional constraints. Socket design must balance structural strength, comfort, and space for electronic components. At the same time, electrode locations become fixed once the socket is fabricated. However, residual limb volume can fluctuate throughout the day, and small shifts in socket position during daily movement can alter electrode alignment. When signal quality changes, patients may require re-adjustments or even a new socket, extending the fitting timeline and sometimes leading to frustration or abandonment of the prosthesis. The Result: A Trial-and-Error Process Because EMG signals vary between individuals and depend heavily on precise electrode placement, the fitting process often becomes iterative and time-consuming. Multiple adjustments, test fittings, and recalibrations may be needed before achieving stable control. For patients eager to regain independence, these delays can be discouraging. For clinicians, they represent one of the most persistent challenges in modern myoelectric prosthetic care. How the Vulcan Myoband Addresses Common EMG Signal Detection Challenges Reliable EMG signal detection remains one of the most common challenges in myoelectric prosthetic control. In clinical practice, obtaining stable signals can be difficult, especially for patients with complex residual limb conditions. Supporting Patients With Weak or Complex EMG Signals The challenge: Many patients struggle to produce strong, clearly separated EMG signals due to factors such as: The Vulcan Solution: Instead of requiring strong or highly isolated contractions, the Myoband detects subtle increases in muscle activation above the resting state to establish basic open-close control of the prosthetic hand, based on a threshold recognition technology. As a result, patients may experience: Scar tissue, thick subcutaneous fat, or skin grafts, common in burn or trauma patients, can weaken EMG signals, making it difficult to identify two reliable muscle sites for traditional dual-electrode control on the residual limb. The Myoband overcomes this by being worn around the upper arm and using multiple sensors to capture overall muscle activation across a wider area. Even if one region produces weaker muscle signals due to scarring or reduced sensitivity, the system can still detect activity from surrounding healthy muscle tissue. Reduced Dependence on Precise Electrode Placement The Challenge: Traditional myoelectric systems often require precise electrode placement over specific muscle sites. Small positional changes can significantly affect signal quality. The Vulcan Solution: The Myoband reduces this dependency through multi-channel EMG sensing distributed around the upper arm, capturing signals from several muscle regions simultaneously. This design offers several practical advantages: Stability During Daily Movement The Challenge: During everyday activities, prosthetic sockets may shift slightly on the residual limb, a phenomenon known as pistoning. When electrodes are embedded inside the socket, this movement can disrupt signal detection. The Vulcan Solution: Because the Myoband is worn directly on the arm, the sensors maintain more stable contact with the skin.  The Myoband also integrates an IMU (Inertial Measurement Unit) that detects arm position and orientation. This helps distinguish between intentional muscle activation and postural contractions. For example: The system is also designed to handle environmental factors such as sweat and changes in skin impedance, using adaptive algorithms that maintain stable activation thresholds and reduce unintended hand movements.

For many amputee parents in the Vulcan user community, the Vulcan Multi – grip Myoelectric prosthetic hand is more than just a modern assistive device. It’s a powerful tool that helps them not only manage daily tasks more easily, but also stay connected – physically and emotionally – with their children. In this article, we’re excited to share the stories of two Vulcan users, Mr. Nam and Ms. Quynh, and how their prosthetic hands help them fully engage in parenthood. Adapting to a New Normal After losing his arm in a workplace accident, Nam faced an overwhelming concern: how would he care for his young son alone while his wife lives nearly 4000 kilometers away in Japan? That question led him to Vulcan. On the day of his fitting, Nam was able to perform the basic functions of his prosthetic hand in just 20 minutes – one of the fastest adaptation cases we’ve seen. He successfully completed all of his initial training exercises, including picking up and pouring water, and even playing with LEGO bricks. By the end of his first week, Nam was already handling essential daily parenting tasks: Creating Everyday Joy For Quynh, one of the most heartwarming moments of her day is being able to hug her children when they get home from school – now, with both arms. She initially worried that her kids might feel embarrassed by her prosthetic hand, but instead, they are so proud of the new look of their mom. On her daughter’s graduation day, Quynh wore her Vulcan hand to the farewell party at school. She opened candy wrappers, cut the cake, and even shook hands with her daughter’s friends – all while surrounded by laughter and excitement. Instead of fear or hesitation, the children were fascinated with the fact that she had a “robot hand.” Live. Love. Laugh – with Vulcan The Vulcan prosthetic hand is more than a medical device. For parents like Nam and Quynh, it’s a bridge back to the small, meaningful moments to their family life – from everyday routines to unforgettable celebrations. Because nothing is more powerful than being able to live, love, and laugh with your children – without limits. We’re Here to Support You We hope the stories of Nam and Quynh brought a little inspiration to your day. If you’d like to learn more about how the Vulcan prosthetic hand can help you thrive as a parent, reach out to us for a personalized consultation.

Thinking about getting a new prosthetic hand but worried the process might be painful?  We understand your concern, that’s why, at Vulcan Augmetics, we’ve designed the entire experience to be fast, supportive, and most importantly, comfortable. Here’s what you can expect when you’re fitted for your new Vulcan Multi-grip Myoelectric Hand: A Quick and Comfortable Process – in Just 3 Simple Steps 1. MeasurementIt all begins with precise measurements of your residual limb. Our trained team uses this information to create a custom socket that fits your body securely and comfortably. 2. Test and AdjustOnce your socket is ready, you’ll try it on. Our team will carefully adjust it to ensure it feels snug but not tight, and that it doesn’t cause pressure or discomfort.  We know that comfort plays a major role in your long-term experience, particularly for users who rely on their prosthetic for more than four hours a day for work and daily routines. 3. Quick Installation and Automatic Calibration Unlike traditional prosthetic systems that require long setup times and manual signal mapping, Vulcan’s unique app-driven calibration system speeds everything up.  Using the Vulcan app, the Vulcan Myoband sensor ring can automatically detect and align to your muscle signals in minutes – no guesswork, no trial-and-error, and NO SURGERY.  This allows for a smoother, faster transition without the discomfort sometimes associated with older calibration methods. Personalized Training That Works for You To help you get comfortable with your new hand, you’ll have full access to short, personalized training sessions – usually starting at just 20 minutes each – via the Vulcan app’s built-in rehab program, which includes 10 easy-to-follow lessons to guide you through controlling your new hand at your own pace. The app also lets you track your progress, explore training exercises, and get helpful support with Chatbox to improve your confidence and comfort. It’s like having a personal trainer for your prosthetic, right in your pocket. So, Is The Process Painful? Not at all. Every part of the Vulcan fitting process is designed to minimize discomfort. From the custom-fit socket to quick calibration and manageable training sessions, we’ve taken every step to make sure the experience is as easy on your residual limb as possible. Have questions or ready to begin your journey with Vulcan? Fill out the contact form