Luxating Patella

Luxating patella is a condition where the kneecap (patella) moves out of its normal position.  Luxating patella is one of the most common knee joint abnormalities of dogs, but it is only occasionally seen in cats.  It may affect one or both of the knees.   In some cases it moves (luxates) towards the inside of the knee, and in other cases it luxates towards the outside of the knee.  Luxation to the inside of the knee is the most common form seen; it is most commonly seen in the small or miniature breeds of dogs such as Poodles, Maltese, Yorkies, and Chihuahuas.  Luxations towards the outside of the knee are seen less frequently.  It can be present in many breeds, but is seen especially in Newfoundlands. 

There are four grades of patellar luxation:

  • Grade I- the kneecap can be manually luxated but the kneecap returns to its normal position when the pressure is released.
  • Grade II- the kneecap can spontaneously luxate out of position with just normal  movement of the knee.
  • Grade III- the kneecap remains luxated most of the time but can be manually reduced into the normal position.
  • Grade IV- the patella is permanently luxated and can not be manually repositioned

Dogs frequently start with a Grade I or Grade II and worsen over time to a Grade III or IV. Many people are not aware their pet is affected, but a luxating patella can cause pain.  Owners may see the pet limp on a rear leg, or they may see them shake a rear leg to try to snap the kneecap back into place.

A serious consequence of patellar luxation is that it predisposes the dog to a rupture of a ligament inside the knee called the anterior cruciate ligament (ACL).  ACL ruptures are very painful, at least initially, and usually the dog doesn't bear weight on the affected leg. Surgery is indicated for any case that is causing lameness or pain.  Owners may also elect corrective surgery as a way to prevent an ACL.  
   Locations

 

Animal Hospital - Bowling Green

Dr. Amanda Alexander
Dr. Michael Doyle 

1777 Campbell Lane 

270-781-5606
Emergencies
270-781-5606
animalhospital@heartlandveterinary.com

 


 

Heartland Veterinary Hospital of Danville   
Dr. Aaron Rowland
1324 Lebanon Road

Danville, KY 

40422     
859-238-7500
Emergencies 
859-238-7500
danville@heartlandveterinary.com

 


 

Heartland Veterinary Hospital of Elizabethtown  
Dr. Will Flanagan  
Dr. Kristen Jones 
108 Blue Heron 

WayElizabethtown, KY 4270  
270-737-1772
Emergencies
270-737-1772
etown@heartlandveterinary.com




Contact

Heartland Veterinary Hospital Corporate
1324 Lebanon Way
DanvilleKY 40422
Get Directions
Phone: 859-238-7500
Fax: 859-236-4324

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