A

B

Figure 2.18. The same horse as in Figure 2.17, illustrating the value of ultrasonography in identifying a piece of wood that was not
seen using contrast radiography. (A) Longitudinal ultrasound image, in the mid-metacarpal region, identifying a hyperechoic density
(cursor) located at the distal extent of the carpal canal between the carpal check ligament and the deep digital fl exor tendon.
(B) Transverse ultrasound image of the same; note the hyperechoic density (cursor). Reprinted from Proceedings of the American
Association of Equine Practitioners, 52, Stashak TS, Wound infection: Contributing factors and selected techniques for prevention,
pp. 270–280, Copyright (2006), with permission from American Association of Equine Practitioners.

Figure 2.19. Arthroscopic view of the distal interphalangeal (coffi n) joint
that had sustained a penetrating wound 24 hours earlier. Note the pieces
of hair and debris in the joint. These foreign bodies would not have been
identifi ed, and it is unlikely they would have been removed by fl ushing
alone without arthroscopic visualization. Reprinted from Clinical Tech-
niques in Equine Practice, 3, Baxter GM, Management of Wounds Involv-
ing Synormal Structures In Horses, pp. 204–214, Copyright (2004), with
permission from Elsevier, Inc.

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