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CHT exam prep - Tendons - Qs & As
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CHT exam prep - Tendons - Qs & As
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CHT exam prep - Tendons - Qs & AsWhat is zone 2 extensor tendon zone? Correct Ans-P2/ middle phalanx
- includes triangular ligament (located over dorsum of middle phalanx and supports lateral
bands - prevents volar displacement)
What is zone 3 extensor tendon zone? Correct Ans-PIP joint
- includes central slip
- includes transverse retinaculuar ligament (prevents dorsal displacement of lateral bands)
What is zone 4 extensor tendon zone? Correct Ans-P1/ proximal phalanx
What is zone 5 extensor tendon zone? Correct Ans-MP joint
What is zone 6 extensor tendon zone? Correct Ans-- dorsal of hand, distal to extensor
retinaculum
What is zone 7 extensor tendon zone? Correct Ans-- within the compartments of extensor
retinaculum
What is zone 8 extensor tendon zone? Correct Ans-- proximal to retinaculum
Lateral bands are in what extensor tendon zone? Correct Ans-Zone 4
, CHT exam prep - Tendons - Qs & As
The dorsal hood is in what extensor tendon zone? Correct Ans-Zone 5
- extends MP
- scar adherence an issue here - can prevent lateral band movement and lead to extensor lag
or limited flexion
Sagittal bands are in what extensor tendon zone? Correct Ans-Zone 5
Typical protocol for zone 3-4 extensor tendon open repair Correct Ans-- Immobilization at
0 degrees PIP ext (DIP free if lateral bands okay) for 4 weeks
- active motion to start with 30 degrees PIP flexion and progress 5-10 degrees weekly
What is the short arc motion (SAM) for zone 3-4 extensor tendon repair? Correct Ans--
Splint in full ext, template splint to allow 30 degrees PIP flexion (20-30 DIP flex)
- week 2 template splint 40 degrees
- week 3 template splint 50 degrees
- week 4 progress to 70-80 degrees (don't necessarily need exercise splint)
- week 5 composite flexion
- week 6 discontinue static ext orthosis
*watch for lag! If lag back to 30 degrees of flexion or back to full time splinting 1-2 weeks
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