Biorid Spine QA Stiffness Test Initial Trial - UNECE
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▻Simple test setup. ▻Using adapters to existing equipment ... ▻Read initial
position of C4, T1, T8, and L1 using inclinometer from stand or tilt sensors ...
Page 8 ...
Biorid Spine QA Stiffness Test Initial Trial
Paul Depinet Mar. 20, 2012
Goals ►Measure quasi-static spine stiffnesses – With and without torsion pins – Flexion and Extension directions
►Do not damage spine ►Simple test setup ►Using adapters to existing equipment
Extension with Pins ►Setup pull pulley as far back as possible
Extension with Pins ►Mount spine to stand as shown ►Adjust manual EOT limit to 100 N through menus – A max pull force of 100 N gives max lumbar loads of ~60 Nm for extension
►Put the torso stand into Manual Mode
Extension with Pins ►Shake spine to center it ►Read initial position of C4, T1, T8, and L1 using inclinometer from stand or tilt sensors ►See photos for bracket screw positions
T8 & L1 locations
C4 location T1 location
Extension with Pins ►Pull to 100 N and hold while measuring all locations
Flexion with Pins ►Mount spine to stand as shown ►Adjust manual EOT limit to 100 N through menus – A max pull force of 100 N gives max lumbar loads of ~50 Nm for flexion
►Put the torso stand into Manual Mode NOTE: picture is setup without screws which removes pins from system
Flexion with Pins ►Shake spine to center it ►Read initial position of C4, T1, T8, and L1 using inclinometer from stand or tilt sensors ►See photos for bracket screw positions
T8 & L1 locations
C4 location T1 location
Flexion with Pins ►Pull to 100 N and hold while measuring all locations
Tests WITHOUT Pins ►To remove the effect of pins, remove all screws from the washer plates so that all vertabrae move freely – see “flexion with pins” setup photo on page 7
►Repeat measurement process for – Flexion – Extension
Results Dummies 0007 and 0077 ►Flexion Test with adjusted spines 20
0 C4
T1
T8
L1
Pelvis
-20 Initial #77
Initial angles
@ 100N #77 Initial #77NB
-40
@ 100N #77NB Initial # 7 @ 100N # 7
-60
@ 100N -80
-100
Possible Test Improvements ►Use 4 sensors to simultaneously measure all locations ►Do continuous data collection ►Measure rebound ►Measure lumbar My loads ►Try decreasing pull angle
