Finger flexor tenosynovitis

Introduction to finger flexor tenosynovitis Tenosynovitis refers to chronic aseptic inflammatory changes caused by mechanical friction of tendon sheath. Tenosynovitis is a common disease in orthopedics. It is more common in manual laborers, especially those who repeatedly perform stretching, flexing, pinching and gripping with fingers. The disease is more common in women than in men. basic knowledge The proportion of illness: 0.05% - 0.1% Susceptible people: no special people Mode of infection: non-infectious complication:

Causes of flexor tendonitis of the fingers

(1) Causes of the disease

The tendon sheath is caused by chronic aseptic inflammation caused by mechanical friction of the flexor tendon contraction.

(two) pathogenesis

The site of flexor tenosynovitis of the finger is at the beginning of the flexor tendon fibrous sheath corresponding to the metacarpal head (ie, the A1 block), where the thicker annular fiber tendon sheath and the metacarpal head form a relatively narrow sheath inlet. Although the tendon sheath of the thumb is connected to the wrist sac, there are two sesamoids at the head of the metacarpal. The passage is narrow. When the item is grasped, the tendon slides and tightens. At the trochlear joint of the metacarpophalangeal joint, the tendon bends and rubs. Most of them, and the tendon sheath is squeezed by the back and forth of the article and the metacarpal head, which is prone to damage and gradually enlarges and causes stenosis.

Finger flexor tenosynovitis prevention

Pay attention to the rest of the fingers. People who use their fingers for a long time need to pay attention, especially for knitting sweaters and needlework. Be sure to pay attention to the rest and relaxation of your fingers.

Finger flexor tenosynovitis complications Complication

Can be accompanied by a noticeable bounce or bounce.

Finger flexor tendon sheath inflammation Symptoms Thumb unexplained pain Computer miscalculation Trigger refers to the snapping knuckle pad nodules refers to root pain

General symptoms

Slow onset, common in housework and manual operators, more common in middle-aged and elderly women, any finger can be ill, but most commonly seen in the thumb, middle finger and ring finger, mainly manifested as localized pain and finger movement of the metacarpophalangeal joint Restricted, with the aggravation of the stenosis of the tendon sheath and the gourd-like enlargement after the tendon is compressed, most of the swelling will be difficult or impossible to slide through the narrow tendon sheath, and the finger stays in the extension or flexion position, and the interlocking phenomenon occurs.

2. Local signs

During the examination, a nodular joint can be touched at the local tenderness of the patient's metacarpal head. When the finger flexes and stretches, the nodule can be felt to slide, but it is often blocked by the narrowing of the tendon sheath. When the force continues, it can suddenly slide over, similar to pulling the trigger. Accompanied by snapping or bouncing, the pain is obvious, so this disease is also called the trigger finger, snap finger, plucking finger and so on.

Examination of finger flexor tenosynovitis

Partial inspection

The induration due to the hypertrophy of the tendon sheath can be touched at the metacarpal head of the palm of the hand, and the tenderness is obvious. Put a thumb on the palm of the metacarpophalangeal joint, and leave the back of the finger. The patient's flexion and extension finger may slide over the skin or have a sense of bouncing (or smelling). If the lumen is severely narrow, the enlarged part cannot pass, and the sliding of the tendon is not touched, but there is tenderness, and the distal end of the finger cannot be fully flexed and straightened.

Diagnosis and differentiation of finger flexor tenosynovitis

According to the medical history, clinical symptoms, signs, and the trigger of the trigger finger can be diagnosed.

diagnosis

1. The disease is mostly formed gradually, and occasionally due to excessive exertion.

2. The early symptoms of this disease are unfavorable finger movements. The palms of the metacarpophalangeal joints are sore and uncomfortable, especially after getting up in the morning or tired, and the pain is worse when holding hard objects. When you barely straighten your fingers, there is an interlock or snap at a certain angle. The hand is hot and cold, and has a little comfort after the hot water bath.

3. Check that the induration due to hypertrophy of the tendon sheath can be reached at the metacarpal head of the palm of the hand, and the tenderness is obvious. Put a thumb on the palm of the metacarpophalangeal joint, and leave the back of the finger. The patient's flexion and extension finger may slide over the skin or have a sense of bouncing (or smelling). If the lumen is severely narrow, the enlarged part cannot pass, and the sliding of the tendon is not touched, but there is tenderness, and the distal end of the finger cannot be fully flexed and straightened.

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