Trigger Finger Release

Why this approach — at MOS

Trigger finger release is one of the most satisfying procedures in hand surgery because the results are immediate — patients on the table can often feel the difference the moment the pulley is released. The operation is straightforward, but care at the A1 pulley level is essential to protect the digital nerves, which run on both sides of the pulley and must be identified before the pulley is divided.

For the thumb, the digital nerves are anatomically closer to the A1 pulley and the risk of nerve injury with percutaneous release is higher than for the fingers. We favor open technique for trigger thumb, which provides direct visualization and clear identification of the nearby neurovascular structures. For the index, middle, ring, and small fingers, both open and percutaneous approaches are effective, and the choice is individualized.

Patients from across the Bethesda area and Montgomery County can typically be seen, consented, and scheduled quickly for this procedure — the short operative time and outpatient setting mean minimal disruption to work and daily life. Most patients resume light activities within days of the procedure.

Who is a candidate?

Indications

• Persistent triggering or locking that has not resolved with splinting and at least one corticosteroid injection
• Multiple episodes of finger locking requiring passive manipulation
• Severe or locked trigger finger (grade III or IV) in patients with diabetes, who have a lower response rate to injection
• Trigger thumb, which responds less predictably to injection than fingers
• Recurrent triggering after two injections — a third injection is unlikely to provide lasting relief

Contraindications

• Mild triggering with no locking that has not received an adequate trial of splinting
• Active skin infection over the palm or finger base
• Patients who have not yet tried a corticosteroid injection (unless injection is contraindicated, as in insulin-dependent diabetes with poor glucose control)

Conservative Treatment First

Most patients with trigger finger should try non-surgical treatment before considering surgery. Nighttime extension splinting of the affected finger prevents the finger from curling into the flexed position during sleep — the period of sustained flexion that most aggravates the catching. Anti-inflammatory medications can reduce synovial inflammation.

Corticosteroid injection directly into the tendon sheath at the A1 pulley is the most effective non-surgical treatment. A single injection provides lasting relief in approximately 50–70% of patients. A second injection can be tried if the first provides partial but incomplete benefit. When two injections have failed to resolve triggering, the likelihood of a third injection succeeding is low and surgery becomes the efficient next step. Patients with insulin-dependent diabetes respond to injections at lower rates than the general population and are more often appropriate surgical candidates earlier in their treatment course.

The procedure

What Is Trigger Finger Release?

Trigger finger release is a quick outpatient surgery that opens a narrowed tendon sheath pulley in the finger, allowing the flexor tendon to glide freely. It treats trigger finger — a condition in which the finger catches, locks, or snaps when bent or straightened — when injections and splinting have not worked.

The flexor tendons that bend the fingers run through a series of tunnel-like rings called pulleys. The A1 pulley, at the base of each finger and thumb, is the most common site of narrowing. When the tendon or its surrounding sheath becomes thickened — due to repetitive gripping, diabetes, inflammatory arthritis, or simply age — the tendon can no longer glide smoothly through this first pulley. Instead it catches, producing the snapping or triggering sensation that gives the condition its name. In severe cases, the finger locks in a bent position and must be manually straightened.

Trigger finger release involves a small incision at the base of the finger to directly divide the A1 pulley. Once divided, the tendon glides freely and the triggering stops immediately. The procedure takes 10–20 minutes and is performed under local anesthesia — no sedation or general anesthesia is required in most cases. It is one of the most reliably successful procedures in hand surgery.

What Happens During Trigger Finger Release?

Setting: Trigger finger release is performed on an outpatient basis under local anesthesia — an injection of lidocaine at the base of the finger and palm. You are awake and comfortable throughout the 10–20 minute procedure. No IV sedation or general anesthesia is required in most cases.

Positioning: The hand is positioned palm up on a padded arm board. A small dressing is wrapped above the fingers to provide a clean field. A tourniquet is typically not needed for this procedure.

Open technique: A small transverse or oblique incision — approximately 1–2 cm — is made in the palm at the level of the distal palmar crease, directly overlying the A1 pulley of the affected finger. The surgeon retracts the skin and identifies the A1 pulley, which appears as a thickened, glistening band. It is divided longitudinally with a scalpel. The surgeon confirms that the flexor tendon now glides freely by asking the patient to bend and straighten the finger while still on the table. The incision is closed with 1–2 sutures.

Percutaneous technique: In some cases, a needle is used to release the pulley percutaneously — through the skin without an incision. This works best for fingers (less nerve risk) but carries a small risk of incomplete release. Dr. Fitzgibbons discusses the appropriate technique based on anatomy and the finger affected.

Recovery room: A small dressing is applied. You are discharged immediately. Driving is generally possible the same day if the other hand is unaffected.

Recovery timeline

Frequently Asked Questions