Patellar dislocation: Difference between revisions
No edit summary |
No edit summary |
||
| Line 16: | Line 16: | ||
== Clinically Relevant Anatomy == | == Clinically Relevant Anatomy == | ||
<br>The patellofemoral joint is the portion of the knee joint between the patella and the femoral condyles. The patellofemoral articulation totally depends on the function of the quadriceps. It increases the angle of pull of the patellar tendon, improving the mechanical advantage of the quadriceps in knee extension. ( 1,11 ) | |||
The articular surfaces consist of the patella and the trochlear surface of the femoral condyles. The articular cartilage on the medial facet is thicker than on the lateral facet, with the lateral facet bigger than the medial. ( 2 ) | |||
The femoral condyles only project slightly in front of the shaft of the femur but project quite a distance posteriorly. The anterior aspects of both condyles are included in the articular area of the patella. The patellar articular surface is larger on the lateral femoral condyle than on the medial. There is an anterior projection on the lateral femoral condyle lateral to the patellar groove. This is the bony factor, which prevents lateral dislocation of the patella. The trochlea is on the anterior, distal end of the femur. The groove is continuous posteriorly with the intercondylar notch of the femur. The lateral facet is more prominent and has a greater radius. ( 5, 12 ) | |||
<br>The suspension and movement of the patella is provided by passive and active stabilizers. <br>• Passive: fascia lata, ligamentum patellae, capsule of the knee, ligamentum patellofemorale medial and lateral and ligamentum meniscopatellare medial and lateral <br>• Active: the four heads of the quadriceps, ligamentum patellae and the retinacullum ( 1 )<br> | |||
== Epidemiology /Etiology == | == Epidemiology /Etiology == | ||
Revision as of 16:38, 13 March 2012
Original Editors
Lead Editors - Your name will be added here if you are a lead editor on this page. Read more.
Search Strategy[edit | edit source]
The first step of my search strategy was consulting the medical library of the university. Then I searched the databases online for articles relevant for this subject like; pubmed, Pedro an web of knowledge. On this websites I used keywords like: patella, managment, dislocation and human.
Definition/Description
[edit | edit source]
A luxating patella or patellar dislocation is a severe acute injury where there is a shift of the patella. Because of this shift the patella will leave the patellofemoral groove.
Clinically Relevant Anatomy[edit | edit source]
The patellofemoral joint is the portion of the knee joint between the patella and the femoral condyles. The patellofemoral articulation totally depends on the function of the quadriceps. It increases the angle of pull of the patellar tendon, improving the mechanical advantage of the quadriceps in knee extension. ( 1,11 )
The articular surfaces consist of the patella and the trochlear surface of the femoral condyles. The articular cartilage on the medial facet is thicker than on the lateral facet, with the lateral facet bigger than the medial. ( 2 )
The femoral condyles only project slightly in front of the shaft of the femur but project quite a distance posteriorly. The anterior aspects of both condyles are included in the articular area of the patella. The patellar articular surface is larger on the lateral femoral condyle than on the medial. There is an anterior projection on the lateral femoral condyle lateral to the patellar groove. This is the bony factor, which prevents lateral dislocation of the patella. The trochlea is on the anterior, distal end of the femur. The groove is continuous posteriorly with the intercondylar notch of the femur. The lateral facet is more prominent and has a greater radius. ( 5, 12 )
The suspension and movement of the patella is provided by passive and active stabilizers.
• Passive: fascia lata, ligamentum patellae, capsule of the knee, ligamentum patellofemorale medial and lateral and ligamentum meniscopatellare medial and lateral
• Active: the four heads of the quadriceps, ligamentum patellae and the retinacullum ( 1 )
Epidemiology /Etiology[edit | edit source]
add text here
Characteristics/Clinical Presentation[edit | edit source]
add text here
Differential Diagnosis[edit | edit source]
add text here
Diagnostic Procedures[edit | edit source]
add text here related to medical diagnostic procedures
Outcome Measures[edit | edit source]
add links to outcome measures here (also see Outcome Measures Database)
Examination[edit | edit source]
add text here related to physical examination and assessment
Medical Management
[edit | edit source]
add text here
Physical Therapy Management
[edit | edit source]
add text here
Key Research[edit | edit source]
add links and reviews of high quality evidence here (case studies should be added on new pages using the case study template)
Resources
[edit | edit source]
add appropriate resources here
Clinical Bottom Line[edit | edit source]
add text here
Recent Related Research (from Pubmed)[edit | edit source]
see tutorial on Adding PubMed Feed
Extension:RSS -- Error: Not a valid URL: Feed goes here!!|charset=UTF-8|short|max=10
References[edit | edit source]
see adding references tutorial.
