Knee Scope Surgery

Veterinary Q&A: Knee problems in dogs

Question: My dog has been diagnosed with luxating patellas. What does that mean in layman terms?

Answer: The knee cap (or patella) is a small, rounded bone associated with the knee joint (called a stifle joint in dogs). Its function is to increase the power that the quadriceps muscle can generate to extend the knee. In layman's terms a "luxating patella" is a knee cap that dislocates to either side of its normal central position over the knee. Medial patella luxation dislocates to the inside region of the knee, and lateral patella luxation dislocates in the opposite direction.

Question: What are symptoms of luxating patellas?

Answer: The most common symptom of a patella luxation is intermittent, non-weight-bearing lameness (limping) where the dog will intermittently carry the affected leg for two to three steps, then walk on it almost normally, then intermittently carry it again. This symptom reflects the intermittent nature of the patella luxation and then resuming its normal position (reduction).

Other symptoms may include weakness in the back legs, making the dog reluctant to jump or climb stairs, or constant ongoing lameness. In severe cases of patella luxation there may be obvious deformity of the hind leg causing severe disability.

Question: Is the problem graded by severity? Can you explain?

Answer: Patella luxation varies from very mild, with the dog showing very little or no symptoms (grade 1), to severe (grade 4). In general, symptoms become more severe and persistent as the grade gets higher. High-grade luxations are more difficult to fix and unfortunately even low-grade luxations (grade 1's and 2's) can progressively worsen to become higher-grade luxations (3's and 4's) over time.

Question: Is it an inherited problem or can it develop in once-healthy knees?

Answer: Medial patella luxation in toy and small-breed dogs is considered a heritable trait that can be passed on from parent to offspring, although the exact mode of inheritance is not fully known (it is polygenic, i.e. multiple genes are involved). As such, it now is recommended that dogs with medial patella luxation should not be used for breeding.

Lateral patella luxation and medial patella luxation in large dogs are also strongly suspected to be a heritable condition according to the Orthopedic Foundation for Animals (OFA).

Knee Scope Surgery |

Arthroscopic surgical procedure to trim cartilage in the knee is a worthless procedure. I’ve seen many patients who’ve had cartilage eliminated by surgeons for a median charge of $5000 and then they should have a knee alternative a number of years later. The surgeon should know about the harm he is doing because he has to see the identical patients for followup when they require knee alternative surgery.

A report within the New England Journal of Medicine (July 11, 2002) exhibits that knee surgical procedure to take away cartilage is worse than doing nothing. The headline from Baylor Medical School, the place the landmark examine was carried out, is that “Study Finds Widespread Knee Surgical procedure No Better Than Placebo.” Sufferers with osteoarthritis of the knee who underwent placebo arthroscopic surgery have been just as likely to report pain aid as those that acquired the true procedure. The researchers say their outcomes problem the usefulness of one of the vital frequent surgical procedures carried out for osteoarthritis of the knee. Lead investigator Dr. Elda P. Way states, “The truth that the effectiveness of arthroscopic lavage or debridement in patients with osteoarthritis of the knee is no higher than that of placebo surgical procedure makes us query whether the one billion plus dollars spent on these procedures won’t be put to better use.

In the examine, one hundred eighty patients with knee ache had been randomized into three groups. One group acquired debridement, in which worn, torn, or unfastened cartilage is cut away and eliminated with assistance from a pencil-skinny viewing tube called an arthroscope. The second group underwent arthroscopic lavage, through which free cartilage is flushed out. The third group underwent simulated arthroscopic surgery; small incisions had been made, however no devices were inserted and no cartilage removed. The people who didn’t have surgical procedure on their cartilage did better than the individuals who had a few of their cartilage removed.

In the United States, more than 650,000 arthroscopic procedures are carried out annually, at a value of about $5,000 each.

The knee is just two sticks held together by four bands called ligaments. Bones are comfortable, so the ends of bones are coated with a tough gristle called cartilage. Cartilage serves as a padding to protect the ends of bones. As soon as cartilage is broken, it will probably by no means heal. And once you break a small quantity of cartilage in your knee, your knee cartilage can by no means fit collectively correctly, and each time you put pressure on the knee, you break off more cartilage.

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