Randy’s Mission

“The HiFi prosthetic system is so far removed from current prosthetic sockets it is in a category unto itself. Other sockets, be they solid or strut type designs, hand crafted or 3D printed, traditional or high-tech in appearance, so completely and stunningly ignore the need to stabilize the underlying bone of the limb it defies logic!

If wearing such a socket left you wondering if there was a certain level of clinical naivete involved or simply a blatant disregard for your well being, give us a try first before you even consider the thought of something as radical as surgery. I am confident if you are a candidate for a removable interface, our HiFi will outperform all other options.”

Randall Alley, HiFi Inventor, CEO biodesigns
Wearer Praise

“With my HiFi I get greater stability along the entire length of my arm allowing my prosthesis to be stable at all different ranges of motion. My HiFi socket is easy to get into, there are no pitch points, no pain at my distal end, and I have way more degrees of freedom, all with lower trim lines. I have a better connection to all the sensors in my arm making everything much more responsive, and it is way more comfortable than my other socket. There is definitely a perceived notion that body powered prostheses are lighter, but with this HiFi socket, my myoelectric arm feels just as light as my body powered system.”

Jason M.Humeral Wearer

“It is the best socket on the planet. This socket allowed me to qualify for active duty military. I was unable to qualify in a traditional socket due to all its limitations, including a lack of stability, decreased control and poor performance.”

Carey D.Radial Wearer, Active Military

“The fit is really, really good. I am able to wear my HiFi’s all day, every day. I am back in school and am hoping to be running soon.”

Jerry D.Bilateral Femoral Wearer

“My HiFi socket is fantastic. It is very comfortable, no complaints. When it is on...it’s on. Since getting it I have been able to get back to the things I used to do before my accident. I got a new job, have been kayaking, and am back at the gym. I wear my HiFi socket from 6:30am to 9:30pm, every day. When I walk, I feel normal, it’s natural, and I don’t need to think about it.”

David T.Tibial Wearer

“I was in traditional sockets previous to the HiFi and they felt bulky, loose and heavy. In my new HiFi Interfaces my prostheses feel connected to me – they feel lighter, more comfortable, secure and I forget they are there. I am able to wear them more comfortably, even in hot Georgia weather, and they have better range of motion for doing my hair. I never have to worry about them falling off or sliding around in them. They look great and feel more natural than ever before. The windows allow my arms to breathe and provides a fleshy pad for doing transfers (in my wheelchair).”

Aimee C.Bilateral Radial Wearer

“The HiFi definitely gives me more stability.”

Scott L.Femoral Wearer

“"I put on the HiFi and I don't want to take it off. Get out of my way when I’m on this leg. I’m not going back to that old socket. This right here is what you need. I feel bad for everyone out there who is on a traditional socket because that sucks."”

Jessica T.Femoral Wearer

“"I feel like I can skip with the HiFi. It feels much lighter and more comfortable and I feel like I have more control of my prosthesis."”

Linda L.Femoral Wearer

“"With the HiFi, I can last twice as long if not more…I’ve become much more active and involved in tasks that I could not do before the HiFi."”

Ron G.Femoral Wearer

“My short sports prosthesis with its HiFi socket technology, built by Randy Alley and biodesigns, is the only prosthesis that I’ve ever been able to perform with in an immersed water environment, without utilizing the aid of a roll on locking liner. The HiFi fit is truly unique, comfortably hugging the contours of my forearm while stabilizing the prosthesis against undue rotation and providing superior suspension. I recommend the HiFi design for any active person wanting a better, higher performance prosthesis.”

Bob RadocyRadial Wearer & CEO, TRS Prosthetics

“The HiFi System allows me to do everything from basketball, to racquetball, to spin class, to running…to much, much more. With this design I can rely on my prosthetic side more than I could before. The technology behind the HiFi makes me feel more complete. I forget I am wearing a prosthesis. It fits better than any other socket I’ve used. I feel confident with everything I do.”

Richard W.Tibial Wearer

“The HiFi feels more like a part of my body.”

Michael H.Radial Wearer

“The HiFi surpassed all my expectations. It locks me in and without using a liner. I previously tried a socket without a liner but it kept pulling on my skin. With the HiFi the pressure is in all the right spots and all along my limb. It also gives me greater control because my femur is not floating in my socket. There is more of a connection.”

Travis R.Femoral Tester, Para-Athlete, Coach & Mentor

“It’s the greatest invention in prosthetics in the last 100 years.”

Chuck H.Bilateral UL Wearer

“The HiFi makes me feel more secure and makes mobility more comfortable and easier. It is less and lighter - but I can get more out of it. It feels better all the way around. It feels more like a part of me. It moves with me. I’m not fighting it. There is not as much effort to get the movement I’m looking for. This is the feeling I’ve been looking for. It’s the anatomical extension of my limb.”

Jeff F.Femoral & Radial Wearer, 2012 Paralympic Gold Medalist, Archery

“I would like to thank the developer Randall Alley for this new prosthetic system for A/K amputees. I have worn a prosthesis for 47 years. This new system is a God send. I no longer sit crooked and the socket isn't as high on my body. I would love to shout from the mountains how great this prosthesis is. The prosthesis is so much lighter than the old sockets and the comfort level tops the charts. My husband says he has not seen me walk so well in a long time. I just love the HiFi System. It truly is a remarkable system and if it works for me after 47 years in an old quad socket - it will work for just about anyone. There was no adjustment time. It just works!”

Debbie M.Femoral Wearer

“I was happy with my ischial containment socket but I knew I wanted more. With the HiFi Socket, it feels more like a part of me and I have improved range of motion and mobility. There was a noticeable difference in the first couple of days. With the HiFi I have more drive, more strength, more power, especially when doing squats. I was able to also notice the improvement just walking around the kitchen. It's just easier to move around. All the small steps are more accurate and easier to make. The HiFi is awesome. ”

Derek S. Femoral Wearer
Orthotist & Prosthetist Praise

“This interface makes fitting the transfemoral sockets actually work. It improved the suspension, circulation, and most importantly actually comes as close as possible to having the maximum connection of femur motion and resultant socket motion. I could not see fitting a transfemoral patient without this technique, if I was truly interested in the patient's outcome.”

Keith VinnecourCPO

“The improved range of motion, the superb control and the increased comfort with lower trim lines are all very impressive. Utilizing biodesigns’ HiFi Imager has allowed me to consistently achieve the same excellent results with all of my patients.”

Lee MantelmacherMaryland O&P, KISS Technologies

“I arrived as a cynic to see the HiFi Interface System. I left amazed…utterly amazed. The HiFi system has blown my mind and continues to do so.”

Tom CutlerSequoia Prosthetics & Orthotics

“I have done sub-ischial socket designs, but nothing has allowed me to have this much control of the actual femur. It is similar to what you would accomplish with osseointegration, but without the invasiveness or setbacks. It is the next step in the evolution of prosthetics, especially for transfemoral socket design.”

Marcus BakerAdvanced P&O

“With the HiFi, my patients are walking faster and further and have greater stability, reducing their chances of falling. We have published the results. HiFi Interface is far superior to traditional ischial containment sockets.”

Bill SampsonSampson P&O

“This is a big change in socket/interface design and a big improvement to what we have been fitting. You can capture the bone which makes the wearer feel that their limb is attached to them. They haven’t had that before. Traditional AK sockets don’t provide the same level of support or security.”

Eric KimseySuperior O&P

“The benefits we have seen from the HiFi greatly exceed those of any socket design we have done. It finally allows us to gain control of unwanted rotation.”

Joe JohnsonQuorum Orthopedics

“What Randy has developed is one of the most innovative socket/interface designs I have seen… it’s going to revolutionize the field.”

Jay MartinMartin Bionics Innovations

“The HiFi takes socket designs out of the dark ages.”

Matt AlbuquerqueNext Step O&P

“Traditional sockets encapsulate the limb, but the HiFi System actually controls the underlying bone in both swing and stance phases. Wearers appreciate the lower trim line while concurrently enjoying the benefits of greater control and increased comfort.”

John LamorteOrthoPros

“We are fitting our second HiFi today. Things are going great. Just getting the technique down. Right away, notice instead of spending the first couple of weeks getting the proximal trim line tolerable, we are fitting these and immediately focusing on gait training as the sub-ischial socket level eliminates that fitting issue of the socket. That is a huge improvement and making our physical therapists happy too. The sockets fit great.”

Paul HendricksonAscent P&O

“It is really a breakthrough in this field with great benefits for our patients.”

Luis ChotoNevada O&P

“It has been a long time since I have seen a technique that can produce such a significant improvement in function for amputees.”

Jim LowProsthetics Orthotics Barrie, Canada

“Before the HiFi, transfemoral sockets were a nightmare for me and my
patients as we would struggle with comfort and performance issues. Now
with the HiFi, I love telling my patients I can lower their trim lines
while getting increased control and function.”

Paul BolandBoland Prosthetic & Orthotic Center
Physician & Therapist Praise

“The HiFi technology is truly revolutionary. To get amputees to bear weight through the limb allows more natural and efficient gait. I see more ‘normal’ gait pattern movements with the HiFi design and less compensation which means less chance for other injuries. As a therapist, it just makes sense to promote natural movement.”

Pilar Hanes, PTGenesis Physical Therapy

“It is always a pleasure to work with biodesigns’ HiFi sockets during OT training sessions because of the benefit of the user’s excellent control due to solid electrode contact and suspension during functional tasks.”

Kristy Powell, OTOssur

“The HiFi Interface enables amputees to function and move with comfort well beyond their previous boundaries.”

Dave Altobello, MDClinical Principal Investigator, DEKA "LUKE" Arm Project

“When an interface enables the user to be ‘one with their arm,’ it adds tremendous value, and ease of use, for the individual with upper limb loss. The HiFi Interface System does this unlike any design of the past.”

Diane Atkins, OTR, FISPOAssistant Clinical Professor, Department Physical Medicine & Rehabilitation, Baylor College of Medicine, Houston TX
Scientist, Product Developer & Military Praise

“Alley’s HiFi design reduces lost motion better than earlier designs and also reduces pistoning.”

T. Wally Williams, EngineerFormer Director of Product Development, Liberating Technologies, Inc.

“As the Clinical Research Coordinator on the DARPA/DEKA "LUKE" Arm project, we recognized and credited the HiFi Interface for taking the arm system from a bench top proof of concept demonstrator to an everyday wearable arm system. With the HiFi Interface the weight of the Luke Arm, and associated user discomfort caused by regional loading, socket translation and rotation, were minimized if not eliminated due to the distributed loading and compression along the axis of the underlying bone. The HiFi was viewed as an integral part of the arm system to enable extended use throughout the user's operational envelope, and we did not see the restrictions or discomfort-based limitations in range of motion and time of use like we did with the traditional sockets. Due to the stability and function it afforded, the HiFi Interface was the preferred and recommended socket for all 3 generations of the LUKE Arm R&D trials at DEKA as well as our Veterans' Affairs research partner sites.”

Wayne Penn, B.S. BME, M.S. MECEO, Charged Concepts, Inc.

“We have had the pleasure of working with biodesigns and specifically Randall Alley for several years and have seen firsthand the success of his innovative socket designs in terms of improved fit and function. As a manufacturer of prosthetics, we know the importance of a comfortable and stable interface/socket platform to attach our components, and how this connection specifically relates to patient acceptance and usability of their device. I highly recommend Randy's interface technology, especially when coupled with an ilimb hand or Rheo knee.”

Hugh Gill, BSc Mech Eng (Hons), Honorary Fellow of IESIS. HonFIESVice President of R&D Upper Limb Prosthetics, Ossur

“I have had several opportunities to work closely with biodesigns' technology and assess the HiFi from a scientific/structural viewpoint. I believe this is perhaps the most intuitive yet practical solution to a mechanically stable interface I have seen to date. The Compression-Release-Stabilized (CRS) approach provides natural connectivity to the human skeletal system, making it a highly energy efficient, structurally unified design that can accommodate long term wear of prosthetics for both upper and lower limbs. Conceptually, I also believe the CRS approach will ultimately have far reaching benefits for numerous human-device attachment systems, with potential applications ranging from exoskeletons for e.g., orthotics and rehabilitation, to performance enhancing recreational devices.”

Hanna J. Hoffman, Ph.D, PhysicsTechnology Research & Development Adviser (special expertise in Sensors, Lasers, Robotics and Medical Devices).

“I just completed Spec Ops training as an amputee. I couldn't have done it without my HiFi.”

John Doe, Military Badass (needs to remain anonymous for security reasons)

“I started collaborating with Randy Alley when we both won research contracts with DARPA to improve prosthetic interfaces as part of the DARPA HAPTIX program. Randy takes a very effective, systematic approach to interface design, with the goal of making the prosthesis a more natural extension of the patient’s body by means of improving bone control. This unique methodology improves stability for the patient, resulting in greater functionality and usability of the prosthesis. As an engineer, this approach makes a lot of sense, in that much more than pressure distributions need to be considered for a proper fit. If motion between the limb and prosthesis are not properly regulated, pressure distributions mean little, and the overall functionality of the prosthesis may potentially be very limited. I hope to see further acceptance of this type of interface as research and development continues.”

Andrew Kennedy LaPre, Ph.D, Principal Engineer (Robotic Prosthesis Design)Principal Engineer at FTL Labs Corporation

“Through my work at DARPA, I was originally made aware of Alley's Compression Release Stabilized (CRS) socket used on the Luke Arm project, as part of the Revolutionizing Prosthetics Project 2007. The CRS upper limb design was utilized in the Luke Arm clinical trials and proved to be a stable socket platform that could handle the weight and functional demands of DARPA’s advanced dexterous arm.”

Douglas Weber, PhDAssociate Professor Department of Bioengineering University of Pittsburgh

Okay, I see the biodesigns difference.

Ready to see what you can do for me.