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Results for “Patellar Dislocation”

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At least 109 records · Page 6Linked to original sources
PubMed1991

[Management of recurrent patellar dislocation by semitendinous muscle transfer].

After review of the pertinent literature authors report on a new tendon transfer technique not having been found in the available literature. The method has been considered suitable for the treatment of patellar dislocations due to erroneous stretching direction occurring before the end of growth. The semitendinous muscle was separated and transfosed in the tunnel drilled into the patella. By means of this technique the function of the muscle was used against the lateralization tendency of the patella. The paper presents the follow-up of 9 cases.

Adolescent↗
PubMed2001

Magnetic resonance imaging depiction of tight iliotibial band in melorheostosis associated with severe external rotation deformity, limb shortening and patellar dislocation in planning surgical correction.

We present the case of a 14-year-old male with melorhesotosis and severe iliotibial band tightness which was associated with femoral shortening, severe external rotational deformity of the femur, genu valgum and patellar dislocation in the right lower extremity. Skeletal survey revealed irregular radiodense streaks involving the pelvis, femoral head, femoral shaft, distal femoral epiphysis, talus and middle phalangeal bones of the foot. Magnetic resonance (MR) imaging showed thickening of the iliotibial band in addition to low MR signal changes in the bone. Intraoperatively fibrosis in the subcutaneous layer and a thickened iliotibial band were found. MR images were very useful in understanding the soft tissue pathoanatomy in melorheostosis and planning surgical correction.

Adolescent↗
PubMed1988

[The value of arthroscopy following traumatic patellar dislocation].

Traumatic dislocations of the patella and associated osteochondral fractures can be easily diagnosed by arthroscopy. During 1984-1986 acute arthroscopy was performed in 280 patients with traumatic haemarthrosis of the knee joint. In 26 cases the intraarticular bleeding was caused by patellar dislocation. Most of these injuries occurred during sports activities. Arthroscopic surgery gave excellent results in most of the cases. Arthrotomy had to be performed in 3 patients only.

Adolescent↗
PubMed2006

Bilateral patellar dislocation associated with alpha-mannosidase deficiency.

Mannosidosis is an extremely rare genetic disease characterized by a deficiency of the lysosomal enzyme, alpha-mannosidase. This enzyme is necessary for cleavage of mannose from many glycoproteins. In the absence of this enzyme, mannose accumulates in cells throughout the body, including the joints and the synovium. This disease causes many skeletal changes including dysostosis multiplex, synovial hypertrophy, and Charcot-type joints. We report the case of a girl, aged 9 years and 6 months, who developed bilateral patellar dislocation and severe synovial hypertrophy secondary to alpha-mannosidase deficiency. Her disease was further complicated by Charcot elbow and bilateral hip and elbow avascular necrosis.

Abnormalities, Multiple↗
PubMed1994

Acute patellar dislocation during eccentric muscle testing on the Biodex dynamometer.

Isokinetic training and muscle torque measurements are commonly used during rehabilitation after knee ligament injuries. Isokinetic maximal muscle strength tests are performed to monitor the progress in muscle rehabilitation. The muscle power is evaluated by measuring the applied force in the direction of motion (concentric muscle power) or the force against the direction of motion (eccentric muscle power). Both legs are examined to compare the total muscle work and peak torques of the involved leg with those of the uninvolved leg. We report the case of an acute patellar dislocation during eccentric testing of the uninvolved leg on the Biodex isokinetic dynamometer testing device (Biodex Corporation, Shirley, NY).

Acute Disease↗
PubMed1994

Intra-articular vertical dislocation of the patella: a case report of an irreducible patellar dislocation and unique surgical technique.

Intra-articular vertical dislocations of the patella are rare injuries that occur when a laterally or medially directed force is applied to the opposite patellar edge, causing it to rotate about its longitudinal axis. Diagnosis of this injury is not difficult with physical examination alone, but roentgenograms are necessary to rule out associated fracture and to define the direction of the articular surface. A Schanz screw is useful as a reduction tool to restore the patella to its normal relationship in the femoral groove if closed reduction proves impossible.

Adult↗
PubMed1998

Quadriceps pull test: an outcome predictor for lateral retinacular release in recurrent patellar dislocation.

Recurrent dislocation of the patella is a disorder with a complex aetiology. Several surgical procedures have been recommended for its correction, but there are few clinical or radiological guidelines to facilitate the selection of a particular procedure. The results of treating a series of 29 knees are presented with a follow-up of at least 2 years. A significant correlation has been found between the horizontal movement of the centre of the patella on quadriceps contraction (quadriceps pull test) and surgical outcome when lateral release alone is selected for the correction of recurrent patellar dislocation.

Adolescent↗
PubMed1999

MRI appearances of the infrapatellar fat pad in occult traumatic patellar dislocation.

AIM: A study was undertaken to determine the status of Hoffa's infrapatellar fat pad in instances of acutely dislocated patellae. MATERIALS AND METHODS: The study consisted of MR examinations performed on 18 consecutive patients with acutely dislocated and relocated patellae with a mean interval between injury and MR examination date of 14.8 days (range 1-60 days). An analysis of the attachments and intrinsic signal characteristics of the fat pad was performed for each individual case. RESULTS: Hoffa's fat pad was abnormal in all cases. Shear injury from the inferior pole of the patella was present in 16 cases. Intrasubstance disruption with fluid filled clefts were noted in 12 cases. In 17 cases diffuse oedema of Hoffa's fat pad had occurred. In nine cases the damaged fat pad mimicked a loose body, while in five cases an intra-articular post-traumatic loose body was identified. CONCLUSION: Post-traumatic change in Hoffa's fat pad is a constant secondary MR feature not previously reported, that can be added to the spectrum of indirect findings in cases of occult patellar dislocation. In addition, the MRI distinction between post-traumatic changes in Hoffa's infrapatellar fat pad from loose osteo-chondral bodies can be difficult, requiring further correlative imaging.

Adipose Tissue↗
PubMed1992

[Patellar dislocation. Diagnostic and forensic problems].

Very often, patellar luxation or subluxation after spontaneous setting is difficult to diagnose. Concomitant injuries can be highly misleading during diagnosis. Traumatic luxation almost always results from forces exerted on the knee indirectly and by way of the muscles, and must be differentiated from habitual luxation. When the constitution favors the occurrence of luxation it is not the clinical and radiological results that are relevant to the assessment. Only an exact analysis of the course of events can clarify whether the trauma can be recognized as a basic cause covered by insurance laws.

Diagnosis, Differential↗