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F-Scan® | Normal Feet | Bunion feet
In normal walking
Often patients seek surgical correction for their bunion feet is because they have unbearable symptoms of pain of their affected feet and even legs, hips and low back. Painful bunion symptoms are direct result of compromised mechanical function of foot caused by metatarsus primus varus and its secondary deformities.
In normal walking, about 80% of the push-off forces to propel our bodies forward come from the big toe while only 20% from the other four smaller toes. However, hallux valgus deformity renders the big toe less effective in contributing its share of work. Consequently, the walking mechanics of entire foot and leg needs to be altered and eventually causes various symptoms. The abnormal change in walking pattern is difficult to assess visually but it can be readily captured by means of computerized force plate devices.
Documentation of foot function can help not only evaluate the severity of hallux valgus deformities for surgical decisions but also evaluate surgical results in the restoration of normal foot function. Just the same as x-ray examination before and after surgery for cosmetic assessment, mechanical examination is important for function evaluation. After all function is more important for the foot than its look.
Objective evaluation
The measuring device that we use to study the mechanical function of the foot is F-Scan®. It is a computerized system that can transform the pressures and forces under the foot in real time into colored pictures, graphic and numerical data for mechanical analysis. A paper-thin sensor plate is worn inside a shoe to help capture the more realistic walking pattern of the foot.
F-Scan® - http://www.tekscan.com/medical/system_fscan1.html
¡E The F-Scan® system from Tekscan, Inc. provides bipedal plantar pressures using an ultra thin, disposable sensor, which is placed inside the patient's shoes. The system is a simple, a non-invasive means to immediately determine orthotic efficacy, identify areas of potential ulceration, screen diabetic and other neuropathic patients, and observe gait abnormalities. The F-Scan enhances your ability to evaluate, substantiate and document your diagnosis. Used by top footwear companies, universities, and hospitals, the F-Scan system is an incredibly valuable tool for providing quantitative information in both clinical and research-oriented settings. Each F-Scan sensor includes 960 sensing elements, the result of a 60 x 21 sensing array design. The sensors' unique and patented construction enables them to be trimmed to fit any size shoe. These reusable sensors have a spatial resolution of 4 sensels/cm2. The sensors are ultra-thin (0.15mm) thus they are minimally intrusive and are useful both with and without orthotics. We are the only sensor manufacturer that can make that claim and support it. The standard operating pressure range of the sensors is approximately 160 PSI (11kg/cm2) maximum. With an 8 bit digital output of the electronics the user can read pressure differentials of ~ 50g/cm2 resolution. The F-Scan sensors detect, displays and records plantar forces while they take place, without interfering with the normal gait pattern. With innovative Windows-based software, information is presented frame-by-frame, played like a "movie" and shown in either 2-D or 3-D display. Easy to interpret pressure analysis graphs are an additional benefit to your evaluation. Tekscan's F-Scan 5.0 for Windows TM enhancements include multi-peak display, which allows the user to break down the movie into multiple phases. Some new optional features and add-ons to the F-Scan system, include TAM (Timing Analysis Module), video synchronization, and more!
F-Scan® | Normal Feet | Bunion feet
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