Objective—To document peak vertical force (PVF)
and vertical impulse (VI) in the pads of Greyhounds
and Labrador Retrievers.
Animals—8 Greyhounds and 8 Labrador Retrievers.
Procedure—Velocity and acceleration were restricted
to ranges of 0.9 to 1.1 m/s and –0.1 to 0.1 m/s2,
respectively. The PVF and VI measurements were collected
from digital pad (DP)-2, -3, -4, and -5 and the
metacarpal pad (McP) or metatarsal pad (MtP) of each
limb in each dog.
Results—We found no significant differences
between the left and right forelimbs or hind limbs for
any pad in either breed. Vertical forces in the forelimb
were always greater than those in the hind limb. The
PVF in the forelimbs of Greyhounds was greatest in
DP-3, -4, and -5 and DP-3, DP-4, and the MtP in the
hind limbs. The VI in Greyhound forelimbs was greatest
in DP-3, -4, and -5 but greatest in DP-4 in the hind
limbs. The PVF in the forelimbs of Labrador Retrievers
was greatest in the McP, whereas in the hind limbs it
was greatest in DP-4. The VI in Labrador Retriever
forelimbs was greatest in DP-3, DP-4, and the McP
but greatest in DP-3 and -4 in the hind limbs.
Significant differences were detected in load distribution
between the breeds.
Conclusions and Clinical Relevance—This study
confirms that DP-3 and DP-4 are major weight-bearing
pads in dogs. However, loads were fairly evenly distributed,
and DP-5 and the McP or MtP bear a substantial
amount of load in both breeds. (Am J Vet Res 2004;65:1497–1501)
Objective—To determine the outcome and effect of
surgical technique on limb function after surgery for
rupture of the cranial cruciate ligament (RCCL) and
injury to the medial meniscus in Labrador Retrievers.
Study Design—Prospective clinical study.
Animals—131 Labrador Retrievers with unilateral
RCCL and injury to the medial meniscus and 17 clinically
normal Labrador Retrievers.
Procedure—Affected dogs had partial or complete
medial meniscectomy and lateral suture stabilization
(LSS), intracapsular stabilization (ICS), or tibial
plateau leveling osteotomy (TPLO). Limb function
was measured before surgery and 2 and 6 months
after surgery. Treated dogs were evaluated to
determine the probability that they could be differentiated
from clinically normal dogs and tested to
determine the likelihood that they achieved
Results—No difference was found between LSS or
TPLO groups, but dogs treated with ICS had significantly
lower ground reaction forces at 2 and 6
months. Compared with clinically normal dogs only,
14.9% of LSS-, 15% of ICS-, and 10.9% of TPLO-treated
dogs had normal limb function. Improvement was
seen in only 15% of dogs treated via ICS, 34% treated
via TPLO, and 40% treated via LSS.
Conclusions and Clinical Relevance—Surgical technique
can influence limb function after surgery.
Labrador Retrievers treated via LSS, ICS, or TPLO for
repair for of RCCL and medial meniscal injury managed
with partial or complete meniscectomy infrequently
achieve normal function. Results of LSS and TPLO are
similar and superior to ICS. (J Am Vet Med Assoc 2005;226:232–236)