Luxating patella

Luxating patella
Other namesTrick knee, subluxation of patella, floating patella, floating kneecap
Patellar luxation on radiograph: Left before, right after reduction; after reduction, the patella is still displaced.
SpecialtyOrthopedics

A luxating patella, sometimes called a trick knee, is a condition in which the patella, or kneecap, dislocates or moves out of its normal location. It can be associated with damage to the anterior cruciate ligament.[1]

Patellar luxation is a common condition in dogs, particularly small and miniature breeds.[2] The condition usually becomes evident between the ages of 4 and 6 months. It can occur in cats, as well, especially domestic short-haired cats.[3]

There have been several reports of patella luxation in other species such as miniature pigs, alpacas, llamas, cattle and goats.[4]

  1. ^ "The Knee and Shoulder Centers - [PRINTABLE] Anterior Cruciate Ligament Surgery". Retrieved 2007-11-27.
  2. ^ Engdahl, Karolina; Bergström, Annika; Höglund, Odd; Hanson, Jeanette (September 2023). "The epidemiology of patellar luxation in an insured Swedish dog population". Preventive Veterinary Medicine: 106034. doi:10.1016/j.prevetmed.2023.106034.
  3. ^ Ettinger, Stephen J.; Feldman, Edward C. (1995). Textbook of Veterinary Internal Medicine (4th ed.). W.B. Saunders Company. ISBN 0-7216-6795-3.
  4. ^ Høy-Petersen, J.; Smith, J. S.; Merkatoris, P. T.; Black, K. E.; Faivre, C. M.; Miles, K. G.; Tatarniuk, D. M.; Kraus, K. H. (2020). "Trochlear wedge sulcoplasty, tibial tuberosity transposition, and lateral imbrication for correction of a traumatic patellar luxation in a miniature companion pig: A case report and visual description". Frontiers in Veterinary Science. 7: 567886. doi:10.3389/fvets.2020.567886. PMC 7838352. PMID 33521073.