novelusa.com: Systems/Software: pliance



pliance Applications

Medical

  • intraarticular: designed to measure the intraarticular contact pressure and force. The sensors can be used both in-vitro and in-vivo. They can be made to be biocompatible and sterilizable. Results have shown that early application of the sensors in total knee arthoplasties may help lessen compartment imbalance and, therefore, help optimize implant kinematics, function, and longevity.
    References:
    • Potthast, W, Bruggemann, GP, et al. Intraarticular pressure distribution in the talocrural joint is related to lower leg muscle forces.  Clinical Biomechanics. 2007.
    • Rikli, DA, et al.  Intra-Articular Pressure Measurement in the Radioulnocarpal Joint Using a Novel Sensor: In Vitro and In Vivo Results. The Journal of Hand Surgery. 32A: 1. 2007.
    • Martinelli, L, et al.  Comparison of Capacitive versus Resistive Joint Stress Sensors. Clinical Orthopaedics and Related Research. 447. pp 214-220. 2006.
    • Richter, M, et al.  Intraoperative Pedography: A Validated Method for Intraoperative Biomechanical Assessment.  Foot and Ankle International. 27:10. 2006.
    • Wasielewski, RC. An Intraoperative Pressure-Measuring Device Used in Total Knee Arthoplasties and Its Kinematics Correlations. Clinical Orthopaedics and Related Research. 427. pp171-178. 2004.


    Wrist Sensor Example (AVI video 2.1 MB)

Biomechanics

  • prosthesis: designed to measure the pressures at the limb-socket interface. The sensors can be placed on anatomical landmarks and points of interest throughout the socket. Research has shown that increased pressures can lead to ulcerations and further issues. Peak pressures and pressure time integrals have proven to be important factor when looking at socket mechanics.
    References:
    • McPoil, TG, et al. The Effect of Four Prosthetic Feet on Reducing Plantar Pressures in Diabetic Amputees. Journal of Prosthetics and Orthotics. 12:3. 2000.
    • Burnfield, JM, et al. Effect of prosthetic Malalignment on EMG and intra-socket pressures in an individual with trans-tibial amputation.
    • Polliack, A, et al. Socket measurement systems perform under pressure. Biomechanics. June 1999.


Socket Sensors Example (AVI video 13.5 MB)

  • seating/wheelchair: designed to measure the static or dynamic pressures at the chair-buttocks interface. The system can aid in the design and analysis of both the chair and the cushion. Since the system can run wirelessly, its applications can include real-life studies.
    References:
    • Kernozek, TW, et al. The effects of body mass index on peak seat-interface pressure of institutionalized elderly. Archives of Physical Medicine & Rehabilitation. 83:6. pp868-71, 2002.
    • Kernozek, TW and Lewin, JE. Seat interface pressures of individuals with paraplegia: influence of dynamic wheelchair locomotion compared with static seated measurements. Archives of Physical Medicine & Rehabilitation. 79:3. pp313-6. 1998

Wheelchair Rugby Example (AVI video 4.9 MB)

Industrial

  • tire: designed to measure pressure distribution at the contact area of a tire.

Tire Testing Example (AVI video 1.1 MB)

  • seating: designed to measure the pressure between two soft and curved surfaces. This application can be used in many different environments from automotive design, to wheelchair design, to workplace design.
    References:
    • Kernozek, TW, et al. The effects of body mass index on peak seat-interface pressure of institutionalized elderly. Archives of Physical Medicine & Rehabilitation. 83:6. pp868-71, 2002.
    • Kernozek, TW and Lewin, JE. Seat interface pressures of individuals with paraplegia: influence of dynamic wheelchair locomotion compared with static seated measurements. Archives of Physical Medicine & Rehabilitation. 79:3. pp313-6. 1998

Seat Belt Example (AVI video 3.9 MB)


Car seat Example (AVI video 3.9 MB)

  • hand: designed for both the surface of the hand and the surface of the object, the hand sensors are ideal for tool design. Contact forces and grip pressure can be investigated in a variety of conditions.
    References:
    • Lemerle et al. Application of pressure mapping techniques to measure push and gripping forces with precision. Erognomics. 51:2. pp 168-191. 2008 .
    • Welcome, D, et al. An investigation on the relationship between grip, push, and contact forces applied to a tool handle. International Journal of Industrial Ergonomics. 34. 507-18. 2004.
    • Mühldorfer-Fodor, M, et al. Grip force monitoring on the hand: Manugraphy system versus Jamar dynamometer. Archives of Orthopaedic and Trauma Surgery. 134. 1179-88. 2014.

Dynamic hand grip Example (AVI video 3.3 MB)

Equine

  • equine: the pliance equine system was designed specifically to look at both the interaction of the rider with the saddle and the interaction of the saddle with the horse. Mats are designed for both English and Western style saddles. Peak pressures, pressure and force distribution, and contact area of both the rider and the saddle can be determined.
    References:

NEW pliance horse saddle (WMV video 3.7 MB)


pliance horse saddle Example (AVI video 2.7 MB)

Sports

  • bicycle: since the pliance sensors are elastic they can conform to almost any surface, including bicycle seats. With a growing interest in competitive cycling, and an increased number police using bicycles as their mode of transportation, there is an increased interest in seat biomechanics. Peak pressure and contact area can be measured and optimized for factors like seat design, angle, height, etc. The pliance sensors can also be combined with the pedar insoles to simultaneously measure the pedal pressures with saddle pressures.
    References:
    • Potter, J. et al.  Gender Differences in Bicycle Saddle Pressure Distribution during Seated Cycling. Medicine and Science in Sport and Exercise.  2008.
    • Lowe, BD et al. Effect of Bicycle Saddle Designs on the Pressure to the Perineum of the Bicyclist. Medicine Science in Sports and Exercise. pp 1055-62. 2004.

pliance Bicycle Sadlle and pedar insoles Testing Example (WMV video 1.2 MB)


pliance Bicycle Testing Example (AVI video 3.9 MB)

For a complete listing of references relating to pressure, please click References.

 

Download Brochures

 
pliance sensors (2.11 mb)
pliance manugraphy (3.66 mb)
pliance prothesis (3.5 mb)
pliance saddle (4 mb)
pliance wheelchair (2 mb)
pliance tire (800 KB)
pliance FTM (692 KB)


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