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OR-PR 164

OR-PR 164. Task 1 Competency 3 Lay Out the KAFO for Fabrication. Objective. Supplied with a full leg tracing and a completed orthometry form you will create a “blueprint” to be used when fabricating the metal AFO. Correct Ankle Dimensions.

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OR-PR 164

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  1. OR-PR 164 Task 1 Competency 3 Lay Out the KAFO for Fabrication

  2. Objective • Supplied with a full leg tracing and a completed orthometry form you will create a “blueprint” to be used when fabricating the metal AFO

  3. Correct Ankle Dimensions • Identify and mark the apices of the medial and lateral malleoli • Lay out a line passing through the marks • Measure the width of the tracing between marks and mark midpoint

  4. ½ measured M-L ½ measured M-L Correct Ankle Dimensions • Measure out ½ the measured M-L from the orthometry form from the center and mark

  5. Correct Ankle Dimensions • Redraw ankle region, blending in with original tracing

  6. 1 ¼” Correct Ankle Dimensions • Measure medially from medial malleolus 1 1/4” and mark

  7. Correct Knee Dimensions • Find approximate knee joint center and draw horizontal line

  8. Correct Knee Dimensions • Determine midpoint of tracing • Measure out ½ the measured M-L from the orthometry form from the center and mark

  9. Correct Knee Dimensions • Redraw knee region, blending in with original tracing

  10. 5/8” Correct Knee Dimensions • Measure medially from medial knee 5/8” and mark

  11. Determine Mid-Saggital Line • Draw a line beginning at the perineum and passing through the knee and ankle marks

  12. Determine Mid-Saggital Line • Genu Valgum is indicated if the line passes through the knee mark but outside the ankle mark

  13. Determine Mid-Saggital Line • Genu Varum is indicated if the line passes outside the knee mark and through the ankle mark

  14. Lower Section Heights and Locations • Heel base • Shoe thickness • Ankle joint axis • Fibular head • 1 ½”below fib. head (prox. edge of calf band) • 1 ½” below mark #5 (distal edge of calf band) • Medial tibial plateau • Adductor tubercle • Knee joint axis 8 9 7 4 5 6 3 1 2

  15. Upper Section Heights and Locations • Distal edge of distal thigh band (same distance from KC as prox. calf band) • 1 ½” above mark #10 • Perineum • Transfer mark #12 to lateral side of tracing • 1 ½” below perineum • Transfer mark #14 to lateral side of tracing • 1 ½” below mark #14 13 12 14 15 16 11 10 9 Knee Center

  16. Calf Band and Joint Axes • Project lines perpendicular to the mid-saggital line across the tracing for the : • Shoe thickness at heel • Ankle joint axis • Proximal calf band • Distal calf band • Knee joint axis (halfway between the medial tibial plateau and the adductor tubercle) 8 9 7 4 5 6 3 1 2

  17. Proximal and Distal Thigh Bands • Distal edge of distal thigh band • Proximal edge of distal thigh band • Proximal edge of proximal thigh band • Distal edge of distal thigh band 13 12 14 15 16 11 10 9 Knee Center

  18. Ankle Joints and Stirrup • Project a line perpendicular to ankle axis from center of tracing down to heel thickness line • Measure out ½ the measured M-L from the orthometry form on either side of the center and mark ½ measured M-L Ankle Axis ½ measured M-L

  19. 1/8” 3/16” 1/4” 1/8” Ankle Joints and Stirrup • Measure out 1/4” medially and 3/16” laterally from previous marks to create minimum clearance • Measure out another 1/8” on each side to compensate for ankle joint thickness • Project lines perpendicular to ankle axis extending from 2” superior to axis down to heel thickness line. The stirrup will be shaped along these lines Ankle Axis

  20. 1/4” 1/8” Knee Joints • Measure out 1/4” medially and 1/8” laterally for minimum knee joint clearance

  21. Calf Band Widths • Measure the width of the tracing along calf band lines and mark midpoints • Measure out ½ the measured M-L s from the orthometry form from the centers and mark Knee Center

  22. Calf Band Widths • Measure out and mark 1/8” from established M-L to accommodate padding • Measure out and mark an additional 1/8” to accommodate band thickness • Connect the outer marks proximally to distally. The band will be contoured to the inside of these lines Knee Center

  23. Proximal and Distal Thigh Band Widths • Measure the width of the tracing along the distal edge of the distal thigh band and the proximal edge of the proximal thigh band. Mark the midpoints • Measure out ½ the measured M-L from the orthometry form from the centers and mark Knee Center

  24. Proximal and Distal Thigh Band Widths • Measure out and mark 1/8” from established M-L to accommodate padding • Measure out and mark an additional 1/8” to accommodate band thickness • Connect the outer marks proximally to distally. The bands will be contoured to the inside of these lines Knee Center

  25. Completed Tracing • Your completed tracing is now ready to be used in your fabrication of the KAFO END

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