I have seen lipohaemarthrosis associated with fractured patella on many occasions and not demonstrated any other bony injury. MR imaging of the patella (fat sat) demonstrates fat in the patella. It has been suggested that a patella fracture cannot cause a lipohaemarthrosis because there is insufficient fat within the patella. The fat 'floats' on the blood resulting in a visible interface (red arrow). The fat has entered the joint from the bone medulla via the fracture. The blood and fat are both associated with the fracture. A knee lipohaemarthrosis indicates that there is a fracture that communicates with the knee joint.
:max_bytes(150000):strip_icc()/what-is-joint-effusion-189282_color1-5c1afda046e0fb000176973c.png "knee effusion")
The lateral horizontal ray knee view is the one knee projection where we see this appearance. lipo= fat, haemo = blood, throsis= pertaining to a joint). AJR167, September 1996Ī lipohaemarthrosis refers to the presence of a blood and fat in a joint (i.e. Yet Indicative of Significant Internal Derangement. Subtle Fractures About the Knee: Innocuous-Appearing Hall (2) correlated the size of knee effusions on plain film with the amount of aspirated fluid. This is the contralateral knee on the same patient which shows no sign of knee effusion Compare this image with the patient's other knee-> Note also the patella is displaced anteriorly and angled as a result of the pressure exerted by the fluid in the suprapatellar pouch. Note the fluid in the suprapatellar pouch and in Hoffa's fat pad (black arrows). She has sustained a fractured patella and has a very large knee joint effusion (arrowed). This elderly patient fell onto her right knee. A knee effusion is not particularly specific or diagnostic, but the absence of a knee effusion can be useful in cases of equivocal fracture. A knee effusion indicates an intra-capsular injury (but not necessarily a fracture). This is evident from the fluid density seen in the supra-patella pouch (left arrow) and in Hoffa's fat pad (right arrow). The patient fell out of a tree onto both feet. There is a small amount of fluid in the supra-patella pouch (left arrow) and in Hoffa's Triangle (right arrow). This patient presented with a history of dislocated right patella. This position makes assessment of fluid in the supra-patella pouch more difficult. There is also fluid in Hoffa's Triangle (right arrow).
/what-is-joint-effusion-189282_color1-5c1afda046e0fb000176973c.png "knee effusion")
There appears to be a small amount of fluid in the supra-patella pouch (left arrow). This patient presented with a history of a fall the previous day. Increased soft tissue density (fluid density) around anterior femoral condyles (Hoffa's triangle)Īdapted from Weissman and Sledge, 1986, p522 (1).Blurring of posterior aspects of quadriceps tendon.Suprapatellar pouch width greater than 5mm.Soft Tissue Signs of Knee Effusion on Lateral View This page will examine the soft tissue signs of bony injury of the knee- what they are, their plain film appearances, their limitations, and their utility. An equivocal fracture should be considered in the context of other information such as
0 kommentar(er)
