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PubMed1999

The multiple ligament injured knee.

Knee dislocations are complex cases requiring careful initial management to prevent devastating consequences caused by limb ischemia from vascular injury. Initial treatment includes gentle reduction and neurovascular assessment including an arteriogram and vascular reconstruction when necessary. Evaluation by examination and MR imaging will help define all ligamentous and associated pathology. All combined instabilities are repaired or reconstructed at the time of surgery. Early intervention within 3 weeks is preferred, as acute reconstruction is technically easier and more predictable than chronic reconstruction. Allografts are particularly helpful in these complex and time consuming knee injuries. Postoperative rehabilitation consists of initial immobilization followed by a supervised rehabilitation program emphasizing range of motion and strengthening.

Angiography↗
PubMed1985

Patellar dislocation following total knee replacement.

The reported incidence of patellar problems after total knee replacement has ranged from 5 to 30 per cent. Patellar dislocation is infrequent but can cause disabling symptoms. Between January 1974 and May 1982, eleven patients (twelve knees) with symptomatic lateral dislocation of the patella after total knee replacement were treated at The Hospital for Special Surgery by realignment of the extensor mechanism. All of the patients were women. Their average age was sixty-two years and average weight, eighty-seven kilograms. The diagnosis was osteoarthritis in seven knees and rheumatoid arthritis in five. Most of the patients had had preoperative valgus deformity (average, 18 degrees). The cause of dislocation was trauma in three knees, incorrect tracking of the patella after replacement in six, and malrotation of the tibial component in three. Four different prosthetic designs had been used. The design of the implant did not appear to be a factor causing dislocation in this group. The patellar dislocation was treated by proximal realignment of the quadriceps in ten knees, lateral retinacular release alone in one, and revision of the tibial and femoral components combined with proximal realignment in one. After an average follow-up of thirty-four months (range, twenty-four to fifty-seven months), the results according to The Hospital for Special Surgery knee-rating scale were excellent in ten knees and good in two, and there had been no redislocations.

Arthritis, Rheumatoid↗
PubMedDate not supplied

Anterior cruciate ligament repairs in world class skiers.

From 1979 to 1984, 27 skiers who were either present or past members of the United States Ski Team or professional skiers had 30 ACL tears that were repaired primarily. Only two of the repairs were augmented with autogenous patellar tendon grafts. Five patients had complete knee dislocations, including tears of both cruciate ligaments. Nineteen patients had a concomitant extraarticular iliotibial band tenodesis. Twenty-seven knees (24 patients) were followed an average of 57.6 months postoperatively. Recreational skiing was resumed at 5.4 months on average, and in ski racing and pivot-requiring sports all but three patients resumed participation at an average of 9.1 months. In 78% of the knees there was pain-free function. Mild pain was reported in 19%, the majority of which (4/5) was related to vigorous activity. Of the total, only two knees were reported to have a sensation of giving way. On clinical examination 85% (23/27) had normal pivot shift examination with no evidence of abnormal motion. Four percent (1/27) had a 1+ test and 11% (3/27) had "glides." Arthrometer measurements revealed an average of 7.76 mm anterior displacement with 20 pounds of force on the knee with an ACL repair as compared to 5.56 mm on the uninjured knee. The laxity measurements of knees with repaired ACLs fell within the range reported for uninjured knees in the normal population. Five patients had reinjuries to the ACL at an average time of 28 months postoperatively, with two of five undergoing rerepair. Only one patient had an iliotibial band tenodesis to supplement the original ACL repair.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗