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John Michael's Corner Welcome to the intersection of orthotics and prosthetics in cyberspace!
This month will have highlights from the "Biomechanical and Engineering Concepts" and concluding "Business Concepts" segments of the International Conference of Advanced Prosthetics as well as continuing the report from the Orthopadie + Reha-Technik World Congress in Leipzig, Germany. It will conclude with some images of historic upper and lower limb prostheses from Germany.

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International Conference of Advanced Prosthetics (ICAP)

The final part of the report from the ICAP meeting follows, covering the ""Biomechanical and Engineering Concepts" and concluding "Business Concepts" segments. If you are interested in more information, the entire proceedings will be available on NTSC videotape for purchase from the Flex-Foot site at www.flexfoot.com.

There were three outstanding speakers from the Massachusetts Institute of Technology's "Leg Lab". This segment of the world-renowned MIT facility works continuously on the development of mobile robots and the technologies to power and control their movements.

  • Advances in Robotics - Gil Pratt, PhD noted that the robotics industry is now 50 years old, so the era of the massive and stationary industrial robots is waning.
  • Polymer Actuators - Stephen Leeb, PhD introduced the capabilities of polymer actuators, which are synthetic materials that increase or decrease in volume in response to various inputs.
  • Muscle Tissue Engineering - Hugh Herr, PhD spoke on the future technology of muscle tissue engineering.

Business Trends Segment

The final afternoon was devoted primarily to business-related topics that were specific to the current US market conditions and will not be reported here. One presentation of note is reviewed below, and you can also download the outline from the presentation that I gave in this segment.

  • E-Care: Revolution or Evolution - Mike Alderette from the healthcare consulting division of IBM talked about the changes in today's paramedical environment.
  • I presented a historic overview of the globalization of P&O business in the USA in this segment. For those who are interested, the handout outlining the content of these slides can be downloaded here in PDF format. If you don't already have the PDF reader, you can download it free from the Adobe web site.

Orthopaedie + Reha-Technik World Congress 2000

This triennial meeting is the largest exhibition of prosthetic, orthotic, and rehabilitation technology in the world. Consequently, much of the value of this congress is found in the new products and prototypes found on the exhibit floors. Of course, many of the displays were familiar technology and most major US suppliers were represented, either in person or by Euro distributors. But, there were some novel developments here and there.

  • New Scoliosis Orthosis - The TriaC is custom-fitted from a kit of prefabricated bars and straps, and is intended to treat only milder, more flexible curves.
  • Carbon Fiber Pre-Preg Orthoses - Otto Bock Germany was showing some very interesting custom orthoses from their Cfab made from pre-preg carbon fiber material rather than the more familiar vacuum-bag laminations.
  • Prosthetic Knees - New offerings from Otto Bock, Bidermann and Blatchford.
  • Two new variations using contemporary prosthetic knee technology: a polycentric knee with pneumatic swing phase control from Otto Bock, and a microprocessor-controlled hydraulic knee offering both stance and swing phase control from Biedemann-Motech.
  • Historic Devices - The meeting had several display cases full of wonderful examples of German craftsmanship using wood, leather, and similar historic materials.

Reader Comments:

Read all user comments

hydraulic knee joint
In the past I have worn KAFO's because of instability of my joints due to having a rare connective tissue disorder. These were custom made, and of the 'cosmetic' plastic style. This year I had major spinal surgery that led to damage to ... read more

- Fiona   6/15/2005


Re: hydraulic knee joint
Without knowing a great deal more about the details of your physical condition, it will not be possible to make any detailed recommendations, although there are a number of developments in KAFO design in the past decade or so, including the... read more

- John Michael   10/22/2005


Re: hydraulic knee joint
hi i am mohanagandhi,Prosthetist Orthotist ,doing my practice in india (Hyderabad,my Mobile Numbers 9885349838,9885454003,9440054332) i got what u r aiming for ,that is u need some external assistance device which can help you to push... read more

- G.Mohanagandhi   10/22/2005

polycentric knee joints
Hi, I'm trying to find information about reverse engineering of a polycentric knee joint for above knee amputees. I'm trying to take the centrode first and then build the bar system around it. Does anyone know if this has been tried before ... read more

- R. Vegter   5/27/2005


Re: polycentric knee joints
Although I'm not an engineer, I believe this is an interative process. Some years ago, Professor Radcliffe demonstrated a simple program he had written that allowed him to specify different link geometries which produced animations of the ... read more

- John Michael   5/31/2005

virtual prototyping of human limbs using reverse engineering
I am mechanical engineer and am a Lecturer at BIRLA INSTITUTE OF TECHNOLOGY RANCHI .I am doing my phd in the area of reverse engineering for the development and protyping human limbs which would be an aid for the surgeons as well as the doc... read more

- Richa pandey   9/2/2003

Basics of CAD in regards to socket design for trans-femoral amputees
Hi! I'm a college senior(Mechanical Engineering) in India, and am planning to do my Master's in Biomechanics. Could you suggest me a few good web-sites and other related material to understand the basics of mechanics for lower-extremity pro... read more

- Manish Virmani   1/9/2003


Re: Basics of CAD in regards to socket design for trans-femoral amputees
This is a complex area that is not discussed in any depth on the web, to the best of my knowledge. There are a number of texts that provide entry-level information on both biomechanics and socket design concepts. You're probably best advi... read more

- John Michael   1/9/2003

trans-tibial amputee orthoses
Hi, I am a physiotherapist working in Australia. I have a patient case study to perform on a 67 year old female with sero-positive RA for 50 years who had a trans-tibial amputation due to gangrene. A) What prosthesis would be BEST su... read more

- Melissa McSwan   4/30/2001


Re: trans-tibial amputee orthoses
orthosis u approch donjoy company based at US for prosthesis u prefer to go with the folowing components ,1.fixed ankle joint ,2.sach foot,2.silicone suspension sleeve 3.graplite pylon

- G.Mohanagandhi   10/22/2005

amputee cyclists
Hi - I am looking for information on the different types of prosthetic limbs (trans-tibial and trans-femoral) being used by amputee cyclists. The various knee and other components involved interest me, as do the alterations being made to th... read more

- Jennie Jackson   3/18/2001

mountain climber amputee
Hello, I hope you can help me; my son is looking for the name of a man who, he believes, climbed Mount McKinley and is a double amputee. He has an assignment to write about someone who has overcome adversity and he had seen a documentar... read more

- P. Mayes   3/2/2001


Re: mountain climber amputee
You may have already gotten your answer (it is probably too late anyway), but I think the person you are asking about is Ed Hommer. He wrote a book about his life called "The Hill". He also has a web page at www.everestquest.com, which ha... read more

- Tim Griffith   6/14/2002

Can you help me?
hi sir, I'm from Türkey (Adapazar ) and I'm a student in univercity as you know Adapazar saw an earthquake last year and we can not find books as well as before it my teacher gave me a duty about "electro- and magneto- rheologic fluid... read more

- Tolga Ozturk   2/14/2001

Procedure code language
John, Give me more time to send you the document as I am taking the L-code course next week. thanks , rick

- Rick Lehneis   8/30/2000

Procedure codes & Network or Organization Registration
John, May Lehneis O & P also be listed as an organization or network as Actra Has? I have sent a HCFA Orthotic language proposal to David Schultz which is now near complete. Would you care to view it's content and advise me? Thanks, Rick Le... read more

- lehneis   8/7/2000

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