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upper limb · Tangential (Inferosuperior)
Carpal Tunnel (Gaynor-Hart)
Seated, hand and wrist hyperextended.
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AI Patient · KV Sir
How to perform this view
- 01
Hyperextend wrist; patient pulls fingers back.
- 02
Palm long axis as vertical as possible.
- 03
CR 25-30 deg to long axis of hand.
- 04
Centre 2-3 cm distal to base of 3rd metacarpal.
Anatomical & patient position
Patient: Seated, hand and wrist hyperextended.
Part: Wrist dorsiflexed with fingers pulled back by other hand or strap.
Central ray & centring point
25-30 deg to long axis of hand, at palm.
Exposure factors
kVp
60-65 kVp
mAs
4-6 mAs
SID
100 cm
IR size
18 x 24 cm
Grid
No
Respiration
N/A
Clinical indications
- Hook of hamate fracture
- Pisiform/trapezium fracture
- Carpal tunnel calcification
Contraindications & precautions
- Painful wrist unable to hyperextend
Structures shown & evaluation criteria
- Carpal canal, hook of hamate, pisiform