تاثير بيحسي مفصل بين بندانگشتي پاييني بر درد ايجاد شده به صورت تجربي در ناحيه پاشنه در كف سم اسب

Effect of analgesia of the Distal Interphalangeal Joint on experimental lameness induced by heel pain in sole in horses

Objective: To determine if pain of the heel of the sole in horses can be attenuated by anesthesia of the distal interphlangeal joint (DIP). Design: Experimental study. Animals: Six adult and apparently healthy horses. Procedure: Lameness was induced by creating pressure on the heel of the sole by screwing Set-Screws into a nut welded to the inside of each branch of a shoe. Gaits in trot and walk were evaluated before and after application of Set-Screws and after a local anesthetic or saline solution was administered into the DIP joint. Gaits recorded on videotape were evaluated, and lameness scores were assigned to each gait. Statistical analysis: Using Non-parametric paired sign test with P<0.05. Results: Lameness scores were high after application of Set-Screws and remain high after saline solution was administered into the DIP joint. Score decreased significantly (P<0.05) after a local anesthetic was administered into the DIP joint. Clinical implications: Analgesia of the DIP joint desensitizes at least a portion of the sole, so pain arising from the sole in heel region should not be excluded as a cause of lameness when lameness is attenuated by analgesia of the DIP joint. J. Fan. Vet. Med. Univ. Tehran. 58, /: 33-36, 2003.