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Published: Tuesday, June 26, 2007 - 22:00 The researchers have built a lightweight device called “phantom” that resembles the artificial socket, ball, and femur substitutes that surgeons use to replace the joint and bone in hip operations, based on a calibrated X-Y coordinate frame. They drilled tiny holes at precisely measured intervals into the phantom and made cuts at precisely measured angles, favored by surgeons for CAOS operations. Because the precise coordinates of the mechanical (magnetic) ball and socket joint center of rotation have been measured, manufacturers of CAOS tracking sensors can use the phantom to test the accuracy of their measuring instruments. Surgeons also should be able to test the accuracy of their CAOS devices to measure ball and socket joint center of rotation coordinates, angles for cuts into the bone and places for the insertion of screws. Currently, no standardized approach to the evaluation of CAOS technology exists, but an ASTM International committee is working on the establishment of such standards. In the coming months, NIST will submit its hip CAOS phantom to orthopaedic surgeons for review. Clinical trials could follow. If the device wins Federal Drug Administration approval, it’s expected to find its way into operating rooms across the country and world. Researchers look forward to extending the application of the technology to surgical procedures on the knee and shoulder. For more information, visit www.nist.gov/public_affairs/techbeat/tb2007_0426.htm#hip Quality Digest does not charge readers for its content. We believe that industry news is important for you to do your job, and Quality Digest supports businesses of all types. However, someone has to pay for this content. And that’s where advertising comes in. Most people consider ads a nuisance, but they do serve a useful function besides allowing media companies to stay afloat. They keep you aware of new products and services relevant to your industry. All ads in Quality Digest apply directly to products and services that most of our readers need. You won’t see automobile or health supplement ads. So please consider turning off your ad blocker for our site. Thanks, For 40 years Quality Digest has been the go-to source for all things quality. Our newsletter, Quality Digest, shares expert commentary and relevant industry resources to assist our readers in their quest for continuous improvement. Our website includes every column and article from the newsletter since May 2009 as well as back issues of Quality Digest magazine to August 1995. We are committed to promoting a view wherein quality is not a niche, but an integral part of every phase of manufacturing and services.NIST Measuring Device Aims to Up Hip Operation Success
(NIST:Gaithersburg, Maryland) -- Researchers at the National Institute of Standards and Technology are developing state-of-the-art measuring techniques, similar to those used in making aerospace components fit together precisely, that soon could improve success rates for hip replacement surgery. At the request of a group of prominent orthopaedic surgeons and the American Academy of Orthopaedic Surgeons, the NIST researchers are working to improve calibrations and operating room testing of the computer-assisted orthopaedic surgery (CAOS) tracking instruments surgeons use to plan the delicate, highly complex operation. To be completely successful, CAOS hip replacement surgery must take into account tiny human skeletal differences. Imprecise measurements, which could result from conditions seemingly unrelated to the surgery, such as operation room noise or temperature, can lead to poor positioning of implants, leaving some patients with discomfort during walking and, in rarer cases, a need to redo the operation.
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