PMC6104578_01
The puncture wound and the area of sensory abnormality.
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PMC6104578_01_gr1.jpg
fig0005
He presented to us late that night because he started feeling numbness along the distribution of the ulnar nerve (volar aspect of the ring finger and the ulnar aspect of the little finger) (Fig. 1).
The blue back-ground in the mid-forearm is showing the high trifurcation of the ulnar nerve. Note that the most radial branch is gradually diverging away from the main trunk of the ulnar nerve to enter the hand subcutaneously, superficial and radial to the Guyon's canal. This branch is seen distally under a blue back-ground.
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PMC6104578_01_gr2.jpg
fig0010
During the fasciotomy, a high trifurcation of the ulnar nerve in the mid-forearm (14 cm proximal to the wrist crease) was noted (Fig. 2, Fig. 3, Fig. 4).
Close-up of the volar sensory branch just proximal to the wrist.
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PMC6104578_01_gr4.jpg
fig0020
During the fasciotomy, a high trifurcation of the ulnar nerve in the mid-forearm (14 cm proximal to the wrist crease) was noted (Fig. 2, Fig. 3, Fig. 4).
partial closure of the fasciotomy wound two days later.
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PMC6104578_01_gr5.jpg
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The fasciotomy wound was left open and then partially closed two days later (Fig. 5).
Coverage of the remaining distal area with a skin graft.
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PMC6104578_01_gr6.jpg
fig0030
The remaining distal open area was covered with a meshed split- thickness skin graft (Fig. 6).