Task 1 Competency 3 Lay Out the KAFO for Fabrication 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 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

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

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

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

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

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

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

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

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

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

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

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

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 12 13 14 15 16 11 10 9 Knee Center

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

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

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

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 1/8” 3/16” Ankle Axis 1/4” 1/8”

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

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

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

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

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

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