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This article and any supplementary material should be cited as follows: Smit G, Bongers RM, Van der Sluis CK, Plettenburg DH. Efficiency of voluntary opening.

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Presentation on theme: "This article and any supplementary material should be cited as follows: Smit G, Bongers RM, Van der Sluis CK, Plettenburg DH. Efficiency of voluntary opening."— Presentation transcript:

1 This article and any supplementary material should be cited as follows: Smit G, Bongers RM, Van der Sluis CK, Plettenburg DH. Efficiency of voluntary opening hand and hook prosthetic devices: 24 years of development? J Rehabil Res Dev. 2012;49(4):523–34. http://dx.doi.org/10.1682/JRRD.2011.07.0125 Slideshow Project DOI:10.1682/JRRD.2011.07.0125JSP Efficiency of voluntary opening hand and hook prosthetic devices: 24 years of development? Gerwin Smit, MSc; Raoul M. Bongers, MSc, PhD; Corry K. Van der Sluis, MD, PhD; Dick H. Plettenburg, MSc, PhD

2 This article and any supplementary material should be cited as follows: Smit G, Bongers RM, Van der Sluis CK, Plettenburg DH. Efficiency of voluntary opening hand and hook prosthetic devices: 24 years of development? J Rehabil Res Dev. 2012;49(4):523–34. http://dx.doi.org/10.1682/JRRD.2011.07.0125 Slideshow Project DOI:10.1682/JRRD.2011.07.0125JSP Aim – Objectively evaluate mechanical performance of adult-size voluntary opening (VO) prosthetic terminal devices and select best tested device. – Consider whether VO devices have improved in last 2 decades. Relevance – Help patients select appropriate devices. – Help manufacturers improve their designs.

3 This article and any supplementary material should be cited as follows: Smit G, Bongers RM, Van der Sluis CK, Plettenburg DH. Efficiency of voluntary opening hand and hook prosthetic devices: 24 years of development? J Rehabil Res Dev. 2012;49(4):523–34. http://dx.doi.org/10.1682/JRRD.2011.07.0125 Slideshow Project DOI:10.1682/JRRD.2011.07.0125JSP Methods Quantitatively tested 9 devices: – 4 hooks: Hosmer model 5XA. Hosmer Sierra 2 Load VO. RSL Steeper Carbon Gripper. Otto Bock model 10A60. – 5 hands: Becker Imperial. Hosmer Sierra VO. Hosmer Soft VO. RSL Steeper VO. Otto Bock VO. Measured: – Pinch forces. – Activation forces. – Cable displacements. – Mass. – Opening span. Calculated work and hysteresis. Compared results with 1987 data.

4 This article and any supplementary material should be cited as follows: Smit G, Bongers RM, Van der Sluis CK, Plettenburg DH. Efficiency of voluntary opening hand and hook prosthetic devices: 24 years of development? J Rehabil Res Dev. 2012;49(4):523–34. http://dx.doi.org/10.1682/JRRD.2011.07.0125 Slideshow Project DOI:10.1682/JRRD.2011.07.0125JSP Test set up. Cable activation force and displacement are measured. F act = force activation cable, LVDT = linear variable differential transformer, mV act = voltage force sensor (unamplified), USB = universal serial bus, V act = voltage force sensor (amplified), V LVDT = voltage displacement sensor, X act = displacement activation cable.

5 This article and any supplementary material should be cited as follows: Smit G, Bongers RM, Van der Sluis CK, Plettenburg DH. Efficiency of voluntary opening hand and hook prosthetic devices: 24 years of development? J Rehabil Res Dev. 2012;49(4):523–34. http://dx.doi.org/10.1682/JRRD.2011.07.0125 Slideshow Project DOI:10.1682/JRRD.2011.07.0125JSP Results Hooks vs hands: – Hooks required lower activation forces and delivered higher pinch forces than hands. Activation forces: – Very high for several devices. Pinch forces: – Too low for all tested hands. Best hook: – Hosmer model 5XA hook with three bands. Best hand: – Hosmer Sierra VO hand.

6 This article and any supplementary material should be cited as follows: Smit G, Bongers RM, Van der Sluis CK, Plettenburg DH. Efficiency of voluntary opening hand and hook prosthetic devices: 24 years of development? J Rehabil Res Dev. 2012;49(4):523–34. http://dx.doi.org/10.1682/JRRD.2011.07.0125 Slideshow Project DOI:10.1682/JRRD.2011.07.0125JSP Conclusions We found no improvements in VO devices compared with data from 1987.

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