1. Pop Goes the Knee
Falling down wrong, making a sudden turn or getting hit in the knee can all cause an acute knee injury, such as a fracture or rupture, torn cartilage and torn ligaments. There are multiple symptoms and tests that help to identify acute knee injures. A torn anterior cruciate ligament (ACL), found in the center of the knee, can occur when the knee is twisted. This injury occurs more in athletes. The ACL is one of four knee ligaments, but it is injured most often. Symptoms that identify a torn ACL are a popping sound as the knee gives out, stiffness, swelling and bruising. It will be painful to walk, because the knee feels loose. Wrap the knee with a bandage, apply ice and get to the doctor's office for treatment.
2. Twisting and Turning
A torn meniscus can happen during sports or just with age. The meniscus is the cartilage between the thighbone and the shinbone. As you age, the meniscus wears and becomes susceptible to tears. A sudden twist or just bending down can damage it. Symptoms of a torn meniscus include pain along the sides of the knee, swelling and a popping sound. You may not know that you've torn it until walking becomes difficult due to the swelling. If a small piece of cartilage breaks off, the "loose body" can cause the knee to lock. This can make a clicking sound in the knee. A CT scan can identify any loose bodies floating in the knee joint.
3. Busted Knee Cap
A knee fracture can occur when you fall or get hit hard in the knee. Walking isn't possible after this happens because your knee can't take any weight. It swells and is painful. An X-ray will check for broken bones and degenerative joint disease. This type of injury can be treated with a cast or splint, and sometimes requires surgery.
4. What's Your Range?
Unless the injury is severe, you may be able to wait a few days before going to the doctor. This allows the knee to rest and possibly improve. The doctor will look at your knee for bruising, swelling and tenderness, and he will gauge the amount of pain. Your doctor will also check the knee's range of motion. One such test is the Lachman's test, where you lie down on a table while the doctor bends your knee at a 30-degree angle, then slowly moves your leg forward at the knee. If your leg doesn't reach a point of hesitation, you have an acute knee injury.
