How long does it take to recover after draining the water from the knee for bacterial culture

It is quite common to have fluid accumulation in the knee. When you go to the hospital for examination, you may need to draw bacteria from the knee to find out whether the accumulation is caused by bacterial infection. This is of great guiding significance for medication and for determining the condition. There are many reasons for fluid accumulation in the knee joint, which may be caused by bacterial infection. Let's take a look at this aspect.

How long does it take to recover after draining the water from the knee for bacterial culture?

It is recommended to use the following drugs for treatment for one week and then do some light activities. The drugs recommended for you are penicillin injection (skin test is required before use), 4.8 million units each time, twice each time; levofloxacin injection, 0.2 each time, twice a day; texapro solution, 100 ml each time, once a day; vitamin C injection, 5.0 each time, three times a day; oral Yunnan Baiyao capsules, two capsules each time, three times a day; treatment for one week; hot compress with magnesium sulfate on the affected area;

Causes of knee effusion

The knee joint is the joint with the most synovium, the largest articular surface and the most complex structure in the human body. Because the synovium of the knee joint is extensive and located in a relatively superficial part of the limb, it has a greater chance of injury and infection. Knee synovitis is mainly a group of syndromes caused by knee sprain and multiple intra-articular injuries. Such as meniscus injury, synovial membrane injury, cruciate ligament or collateral ligament injury, intra-articular injury and dislocation, knee osteoarthritis secondary to chronic synovitis of the knee and loose bodies in the joint, etc.

Another reason is infection, among which synovial tuberculosis is the most common. Generally speaking, the synovium is rich in blood vessels, has good blood circulation, and has strong resistance to bacteria. However, in the case of tuberculosis infection, the disease progresses slowly and its symptoms are sometimes better and sometimes worse. This is one of the chronic synovitis of the knee joint. Knee synovitis is often secondary to knee osteoarthritis in the elderly. It is mainly due to the mechanical and biochemical stimulation caused by cartilage degeneration and bone hyperplasia, which leads to synovial edema, exudation and effusion of the knee. In young and middle-aged people, it is mostly caused by acute trauma and chronic injury. Acute trauma includes: knee sprain, meniscus injury, collateral ligament or cruciate ligament injury, joint effusion or sometimes blood accumulation, manifested as acute traumatic synovitis of the knee. Sometimes it can also be caused by simple synovial injury of the knee joint, such as minor trauma, or long-term chronic knee strain. Coupled with the invasion of wind, cold and dampness, the knee joint may gradually become swollen and dysfunctional, forming chronic knee synovitis.

The joint swelling type is mainly caused by excessive exercise, and the pain varies in severity. The non-swollen type is characterized by joint pain, often accompanied by mild swelling. Studies have shown that the two types are essentially the same, differing only in the degree of pathological changes in the synovium. Researchers have found that after prolonged and excessive exercise of the knee joint in a single motion, the synovial tissue becomes congested and edematous, and the exudation of red, white blood cells and fibrin is positively correlated with the increase in intra-articular pressure and the decrease in oxygen partial pressure. When the exudation rate exceeds the compensatory absorption rate of the synovium, joint effusion occurs, which leads to a vicious cycle of continued increase in intra-articular pressure and continued decrease in oxygen partial pressure. Over time, chronic sterile inflammation such as synovial degeneration and fatty metaplasia is formed. It is believed that the occurrence of traumatic synovitis after excessive exercise is not only related to repeated impact on the joint surface and damage to the joint capsule, but also plays an important role in the development and outcome of the disease.