Symptom >> Surgical >> Orthopedics

Knee varus

Introduction
Cause
Examine
Diagnosis

Introduction

Introduction Knee varus, commonly known as "O-legs", "Road legs", "Bow legs", " basket legs". It means that at the knee joint, the tibia of the calf is rotated inward by an angle, so it is called "knee varus". The definition of knee varus is easily confused by the fact that the shape of the lesion is taken for granted: the definition of knee varus is not named after the angling angle, but is named after the direction of the calf tibia. Knee varus, the knee joint angle is pointing to the outside, so it is often mistaken for knee valgus.

Cause

Cause

Walking outside the splayed feet, standing in a short position, wearing high heels, sitting, squatting, squatting, etc., will give the knee an outward force, and this force will pull the lateral collateral ligament of the knee. Will cause the knee collateral ligament to relax. The medial and lateral collateral ligaments of the knee joint are stable structures of the medial and lateral angles of the knee joint. When the lateral collateral ligament is slack, the excessive force of the medial collateral ligament will pull the calf tibia to the inside to form a knee varus.

Examine

an examination

Related inspection

Joint examination of limbs and joint movements

In the double heel, the two feet together, relax the legs upright, such as the distance between the knees, it means there is knee varus.

Generally, the severity of knee varus is determined according to two indexes of normal knee distance and active knee distance.

The so-called normal knee distance refers to the distance inside the knee joint when the two legs are close together and the legs and knees are relaxed.

The active knee distance refers to the distance between the two legs and the knees and the knee joints in the upright position, and the distance inside the knee joints.

According to the normal knee distance and the active knee distance, "knee varus" is divided into I degree, II degree, III degree and IV degree.

The normal knee distance is below 3 cm, and the active knee distance is 0, which is I degree;

The normal knee distance is below 3 cm, and the active knee distance is greater than 0, which is II degree;

Normal knee distance between 3 and 5 cm is III degrees;

Normal knee distance is more than 5 cm, which is IV degree.

Diagnosis

Differential diagnosis

The diagnosis should be differentiated from the following similar symptoms:

1.Q angle abnormality: Q angle abnormality is one of the clinical symptoms of unstable humerus. Unstable patella is a common cause of anterior knee pain. It is a common disease of patellofemoral joint, which is softening of tibia cartilage or patellofemoral joint. An important cause of osteoarthritis. Advances in biomechanics and imaging techniques, as well as the diversity of clinical testing methods, have led to the recognition that the degenerative changes in the patellofemoral joint are caused by the instability of the patellofemoral joint or the instability of the tibia caused by the sacral line. Metatarsal deviation, sacral tilt, high humerus, and humeral subluxation.

2. Hip, knee, elbow flexion deformity: children with congenital nephrotic syndrome have a special appearance: common appearance after birth, such as low nasal bridge, wide eye distance, low ear, cranial suture width, anterior iliac crest The posterior malleolus is wide and it is also common for flexion deformity of the hip, knee and elbow. Later, abdominal distension, ascites, and umbilical hernia are common.

3. Limb body turning: knee inversion, commonly known as "O-legs", "roof legs", "bow legs", "squatting legs". It means that at the knee joint, the tibia of the calf is rotated inward by an angle, so it is called "knee varus".

The definition of knee varus is easily confused by the fact that the shape of the lesion is taken for granted: the definition of knee varus is not named after the angling angle, but is named after the direction of the calf tibia. Knee varus, the knee joint angle is pointing to the outside, so it is often mistaken for knee valgus.

4. Knee varus or hip varus: Kaschin-Beck disease is an endemic disease that is prevalent in northern China. The disease was first discovered in the northeast and later found in the northwest. In the northwest region, it is also known as willow disease. Most of the epidemics are concentrated in one area and become an infected area. The cause of this disease is inconsistent in the fusion rate of the tarsal plate, and the lower extremities often have knee varus, knee valgus or hip varus deformity.