The diagnosis and symptom of torn meniscus

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(Free-Press-Release.com) May 29, 2011 -- What is meniscus

Meniscus is located between the upper and lower cartilage tissue of knee joint surface,split from middle and shaped like crescent,so it being called meniscus.With ability of absorb shock,buffer meniscus pressure,enhance knee stability,prevent damage effect.Meniscus is the most easily injury place of knee joint,the torn meniscus most likely happen who engaged in violent movement and the special profession damage.Most of the patients have clear sprained knee injury history,after the injury,the knee can not straight unbend,knee joint swelling,the important basis of meniscal injury is tenderness in the knee clearance. Meniscal injury mostly caused from reverse external force,when only one leg on the ground, crus fixed bearing outside buckling,the medial meniscus suffer suddenly press in femoral condyle and tibial,rotary pressure lead to the torn meniscus,if the greater the degree of buckling of sprained knee joint,the tear parts more tend to back of the knee joint,which function is same with the lateral meniscus tear,but instead the force come from oppsite direction,the broken meniscus parts sliding into knee joints,which occur mechanical barriers of the joint activities,and hinder the flex activities of knee joint,it also being called "knee locking", for the serious trauma cases,the meniscus,cruciate ligament and lateral ligamentous can also damage.

Torn meniscus symptom

Torn meniscus may occur in the anterior horn,posterior horn,middle or edge horn department. The shape of the damage can be longitudinal tear,horizontal tear or irregular shape tear,even more serious break into free body in the knee joint.Most patients have obvious trauma history. The symptoms in acute phase is knee pain,swelling and has obvious joint flexion effusion,trouble of activities of the knee joint.After the acute period,swelling and effusion to resolve by step,but still feeling pain when activity,especially on the downhill,up and down stairs next crouching stood up,the action such as running,jumping,the more obvious pain can be a limp or flexion dysfunction, some patients have"knee locking"in knee flexion phenomena,or has ring when bend the knee.

The diagnosis of torn meniscus

1.Most patients have the knee strain history.

2.There is ring,click sounds when bend the Knee.

3.During instant of injured,the knee joint has a tear feeling and noise,unbearable pain,joint swelling,function limitation,it is more obvious when walking and fluctuation building,some patients with pain,and even can appear soft legs and knee locking phenomenon.

4.When the examination can find the atrophy of quadriceps muscle,pressure pain in the joint space.

5.The torn meniscus click sounds experiment:the patient supine,fully flexor hip and knees, the inspector or doctor holding the patient's foot, with the other hand on the patient's knee joint,first make crus inside the knee, adduction spin again make crus spin outreach,then outside,most adduction unbend have tested positive for pain or play click sound.

6.Lapping experiment:the patient prone,and knee joint flexion about 90 degrees,the inspector pressing hard on the ankle and rotating grinding,some place painful proves positive sign.

7.It is better to do the knee joint air,mri,iodine solution imaging or arthroscopy when necessary.

The causes of torn meniscus

The factors caused torn meniscus is classified as the tear external forces and external abrasives.The tear outside occurred in knee flexion under half the state of the femoral rotation, affects the lateral ligamentous,and ligament pull the edge of torn meniscus.Part of the happen Abrasives external force occurs in the lateral meniscus,especially congenital discotic meniscus, which cover larger position within the joint, along with not flexible enough,so it is easy damage for a long time of articular surfaces grinding.The vessel also injury after torn meniscus,with vein blood stasis,meridian impassability,the symptom can appear local swelling,pain,activities is limited,after a period of time,for the swelling can fade,but the bones and muscles contracture atrophy raise,lead to the knee instability and weakness.The activity is due to rupture flexion of meniscus headend or back-end are embedded in the femur and tibial articular surface, can appear between into locks and elastic joints.Meniscus tear according to tear damage can be divided into I degrees, II and III degree damage.
For more information about torn meniscus treatment,please visit http://www.meniscustears.org/.

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