Interventional Therapy for Stenosing Tenosynovitis

Stenosing tenosynovitis, better known as Trigger Finger Syndrome, is a common condition affecting the tendons of the fingers. It can affect one or more fingers and significantly impair the patient's daily activities.

 

How does Trigger Finger occur and what are its symptoms?

The condition occurs when the flexor tendons of the finger or the sheaths surrounding them are inflamed, resulting in the narrowing of the sheath and the obstruction of smooth tendon movement within it.

Trigger Finger is characterized by the following symptoms:

  • Finger stiffness: The primary symptom of the condition, from which it derives its name, is the sensation of the finger being "locked" in a bent position and suddenly snapping straight when the patient tries to extend it.
  • Clicking sensation: During movement, the patient may experience a painful clicking sensation in the finger joint, accompanied by a characteristic "click" sound.
  • Palpable Nodule: A small palpable nodule may appear on the affected finger, further hindering tendon mobility.
  • Pain and swelling: Trigger Finger can cause pain and swelling in the affected finger, symptoms that are usually more intense after prolonged periods of inactivity, such as after sleep.
  • Limited mobility: In severe cases, the finger may be permanently bent or extended, requiring assistance to move.

What are the causes of Trigger Finger?

Some of the factors associated with the development of Trigger Finger include:

  • Repetitive Movements: Activities involving repetitive finger use, such as manual labor and computer use, can contribute to the development of Trigger Finger.
  • Health Conditions: Conditions such as rheumatoid arthritis and gout, diabetes, and inflammatory disorders may increase the risk of developing the condition.
  • Gender and Age: Women and individuals between the ages of 40 and 60 are more commonly affected.

What is the role of Ultrasound in diagnosing Trigger Finger?

In cases of Trigger Finger, Musculoskeletal Ultrasound serves a dual role, as it can assist not only in the accurate diagnosis but also in the treatment of the condition.

Musculoskeletal Ultrasound can diagnose Trigger Finger with absolute precision, providing detailed information about the affected tendon and neighboring structures, and allowing for the evaluation of the degree and activity of inflammation.

Simultaneously, Musculoskeletal Ultrasound is particularly useful in differential diagnosis between Trigger Finger and other tendon disorders, especially in cases where those coexist with Trigger Finger.

What is the role of Ultrasound in the treatment of Trigger Finger?

For the treatment of Trigger Finger, a specialized Radiologist can perform the following Ultrasound-Guided Therapies:

Ultrasound-Guided Corticosteroid Injection

Corticosteroid injection leads to immediate suppression of inflammation, relief from pain and swelling, and restoration of finger mobility. Ultrasound guidance is crucial as the injection must be made into the tendon sheath and not into the tendon itself, as this could lead to injury and damage of the tendon. Additionally, the precision of ultrasound provides optimal therapeutic results, as the treatment is administered exactly where it is needed, minimizing the risk of complications and reducing recovery time after the procedure.

Ultrasound-Guided Interventional Therapy

In severe cases of Trigger Finger, ultrasound can provide a permanent solution to the problem through revolutionary, ultrasound-guided intervention. The technique involves inserting a needle into the affected finger. With local anesthesia and under ultrasound guidance, the needle breaks the thickening of the tendon sheath, freeing the tendon and allowing for the restoration of normal movement.

A significant advantage of this method is that the use of the needle as a scalpel minimizes tissue trauma, reducing not only the risk of complications but also the recovery time after the intervention. Simultaneously, ultrasound guidance ensures the safety of the procedure, as needle monitoring ensures the avoidance of surrounding points or tendon injury.

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