How to measure Blumensaat line?
How to measure Blumensaat line?
It is calculated by drawing Blumensaat’s line and one line parallel to the distal portion of the ACL. The angle is calculated at the intersection of these two lines. An angle of >15º indicates an abnormal course and probable anterior cruciate ligament tear.
Where is the intercondylar notch in the knee?
distal femur
The intercondylar notch, or intercondylar fossa, is the area of the posteroinferior aspect of the distal femur between its condyles.
Where does ACL attach?
The anterior cruciate ligament arises from the anteromedial aspect of the intercondylar area on the tibial plateau and passes upwards and backwards to attach to the posteromedial aspect of the lateral femoral condyle. Like the posterior cruciate ligament, the ACL is intracapsular but extrasynovial.
What causes increased Q angle?
Increase in Q angle is associated with: Femoral anteversion. External tibial torsion. Laterally displaced tibial tubercle.
What is a Beath pin?
The Beath passing pin, commonly used for anterior cruciate ligament reconstruction, is used to pass the suture for the outside-inside-out repair. Two passes are used to create a mattress suture through the ossicle, and the suture is tied over a bone bridge on the anterolateral tibia.
Can you walk with torn ACL?
Can you walk with a torn ACL? The short answer is yes. After the pain and swelling subsides and if there is no other injury to your knee, you may be able to walk in straight lines, go up and down stairs and even potentially jog in a straight line.
What does ACL pain feel like?
Many people hear a pop or feel a “popping” sensation in the knee when an ACL injury occurs. Your knee may swell, feel unstable and become too painful to bear weight.
How do I lower my Q angle?
The most effective way to decrease a high Q angle and to lower the biomechanical stresses on the knee joint is to prevent excessive pronation with custom-made functional orthotics. One study found that using soft corrective orthotics was more effective in reducing knee pain than was a traditional exercise program.
What is a normal Q angle?
It is well-known that the normal Q angle should fall between 12 and 20 degrees; the males are usually at the low end of this range; while females tend to have higher measurements [6,10–13].
What is the pivot shift test used for?
A pivot shift can be used to assess the combined tibio-femoral internal rotation and anterior tibial translation when the ACL is deficient.
What does blumensaat’s line on a knee mean?
Blumensaat’s line is a linear shadow on lateral radiographs of the knee that corresponds to the roof of the intercondylar notch between the two rounded condyles of the femur.
Which is the posterior part of the blumensaat line?
It is the tangent drawn along the roof of intercondylar notch or fossa of the distal femur on the saggital or lateral view. Small hill type (25%): a protrusion spanning less than half of the line was at the posterior (proximal) part of the Blumensaat’s line.
When to use blumensaat’s line on a radiograph?
The angle at which this line appears on the radiograph can be used to determine the position of the patella or diagnose an ACL injury. On a normal radiograph, the line intersects the inferior pole of the patella, and so can be useful in diagnosing a broken femur as well as a patellar tendon rupture .
Where does the blumensaat line intersect the patella?
Relative position of patella: In a 30 degree flexed knee, the Blumensaat’s line should intersect the lower pole of patella. It may indicate patella baja (low lying) or alta (high riding). 5. ACL-Blumensaat line angle: It is the angle between the intersection of the Blumensaat line and a line parallel to the distal portion of ACL.