Morphological and Imaging Evaluation of the Metacarpophalangeal and Metatarsophalangeal Joints in Healthy and Lame Donkeys.

This study examined the physical characteristics of both healthy and abnormal foot-and-hand joints in donkeys, using techniques such as dissection, casting, X-ray and computed tomography. The aim was to better understand these joints and evaluate different imaging methods, with improvements potentially having applications in veterinary medicine.

Objective and Methods

• The research aimed at understanding the anatomical features of both healthy and abnormal joints in donkeys’ limbs, particularly the metacarpophalangeal and metatarsophalangeal joints. These are basically the joints found in hands and feet of the donkeys.
• A total of 13 donkey limbs were studied using various techniques including anatomical dissection, casting, X-ray, and computed tomography (CT).

Findings

• The joint capsule in these limbs included two sets of recesses— palmar/plantar and dorsal. Among these, the proximal-palmar or plantar recess was larger than the distodorsal recess.
• The researchers identified potential sites for approaching these recesses which could be useful in medical procedures.
• CT scanning done at 300 mA was found to be superior for distinguishing soft tissue structures compared to 120 mA. The 300 mA CT provided better visualization of various internal elements such as the synovial tendon sheath, joint recesses, and multiple types of ligaments.
• CT scanning also offered precise discrimination between the cortex and medulla of certain bones and provided excellent details of the bony structures.

X-ray imaging showed that the joints were free from exostosis (abnormal bony outgrowth), but CT scanning at 300 mA revealed the presence and extent of exostosis in pathologically affected donkeys; this was a new revelation.

Significance and Impact

• This research provides a detailed anatomical record of the metacarpophalangeal and metatarsophalangeal joints in donkeys, using the latest technology.
• The findings can potentially influence clinical veterinary practices, such as determination of anesthesia injection sites.
• Improved imaging techniques could lead to better diagnosis and treatment of conditions affecting the joints in donkeys, enhancing their health and economic value.