INNOVATIVE DIAGNOSTIC TECHNOLOGIES


Fig. 1. Right forelimb with combined right hindlimb impact and pushoff CFHL.


in a straight line is associated with location of the cause of lameness. This information is helpful to vet- erinarians planning their lameness work ups.


1. A horse with CFHL where the forelimb and hindlimb lameness is ipsilateral and the hind- limb lameness is both lack of impact and lack of pushoff. This pattern had a high (86.6%) positive diagnostic rate. The primary problem is most likely in the hindlimb; 86.4% had the primary problemin the hindlimb (Fig 1).


2. AhorsewithCFHLwhere the forelimband hind- limb lameness is ipsilateral and the hindlimb lameness is only lack of pushoff. This pattern had a moderate (62.0%) positive diagnostic rate. Theprimary problem is morelikely tobein the hindlimb; 86.3% had the primary problemin the hindlimb (Fig 2).


It is preferable to see the prior 2 patterns (1 and 2). They have a high to moderately high positive


diagnostic rate, and the good bet is that the primary problemis in the hindlimb.


3. A horse with CFHL where the forelimb and hindlimb lameness is ipsilateral but the hind- limb lameness is only lack of impact. This pattern had a high (77.9%) positive diagnostic rate, but the primary problem is almost as likely to be in the forelimb (45.2%) as in the hindlimb (33.9%) as in both (11.3%). This is considered a difficult pattern as more informa- tion is needed to decide which limb to look at or block first (Fig 3).


4. A horse with CFHL where the hindlimb lame- ness is ipsilateral lack of pushoff and contra- lateral lack of impact. This pattern did not (thankfully) occur very frequently (only 4% of all CFHL cases). Horses with this pattern were just as likely to have the primary cause of lameness in the forelimb (20%), in the hindlimb (35%), in both the forelimb and the


Fig. 2. Right forelimb with only right hindlimb pushoff CFHL. 350 2022 / Vol. 68 / AAEP PROCEEDINGS


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