A practical guide written from the perspective of an Operating Room Nurse.
The workflows, surgeon preferences, and nursing tips presented in this article are based on the author’s real clinical experience. Surgical techniques and operating room practices may vary depending on the surgeon, hospital, and institutional protocols.
What is Trigger Finger?
Trigger finger (stenosing flexor tenosynovitis) is a condition in which the flexor tendon becomes irritated and thickened, preventing smooth gliding beneath the A1 pulley.
Patients commonly complain of:
- Finger catching or locking
- Pain at the base of the finger
- Clicking during flexion and extension
- Finger locked in a flexed position (advanced cases)
When conservative treatment such as steroid injections fails, surgical release of the A1 pulley is indicated.
📌Quick Facts
| Item | Details |
|---|---|
| Procedure | Trigger Finger Release |
| Specialty | Hand Surgery |
| Incision | 1–1.5 cm transverse incision over the A1 pulley |
| Anesthesia | Local anesthesia |
| Position | Supine with arm on arm board |
| Tourniquet | Upper arm or forearm |
| Average Time | 10–20 minutes |
| Wound Closure | Interrupted absorbable sutures |
Indications
Surgery is recommended for patients with:
- Persistent triggering despite steroid injections
- Acutely locked finger
- Painful triggering interfering with hand function
Contraindications
Avoid surgery in patients with:
- Active infection
- Rheumatoid arthritis–related triggering (these patients often require steroid injection or synovectomy rather than simple A1 pulley release)
Surgical Anatomy
The most important structure is the A1 pulley, located at the level of the metacarpophalangeal (MCP) joint.
Structures encountered include:
- Skin
- Subcutaneous tissue
- Palmar fascia
- Flexor tendon sheath
- A1 pulley
- Flexor tendons
- Digital neurovascular bundles (located on each side)
The digital nerves lie very close to the operative field and must be protected throughout the procedure.
Patient Position
- Supine position
- Arm extended on an arm board
- Hand supinated
- Tourniquet applied
- Local anesthetic infiltration
The operative hand is prepared and draped in the usual sterile fashion.
🕒Procedure Timeline
1. Skin Incision
A 1–1.5 cm transverse incision is made directly over the A1 pulley at the level of the MCP joint.
2. Exposure
Blunt dissection is carried through:
- Subcutaneous tissue
- Palmar fascia
The flexor tendon sheath is identified.
Care is taken to protect the digital neurovascular bundles.
3. Identification of the A1 Pulley
The proximal edge of the A1 pulley is identified.
The pulley is clearly visualized before division.
4. Release of the Pulley
Using a scalpel,
- the A1 pulley is divided longitudinally
- the release proceeds along the midline
- injury to the flexor tendon is avoided
Only the A1 pulley is released.
5. Functional Assessment
The patient is asked to:
- flex the finger
- extend the finger several times
The surgeon confirms:
- smooth tendon gliding
- complete disappearance of triggering
- full active motion
Residual catching indicates incomplete release.
6. Irrigation
The wound is irrigated with normal saline.
Hemostasis is confirmed.
7. Skin Closure
Skin is closed using:
- Interrupted absorbable sutures
A bulky dressing is then applied.
Mayo Stand Setup
Typical instruments include:
Cutting
- #15 Blade
- Scalpel Handle
Dissection
- Tenotomy Scissors
- Metzenbaum Scissors
Grasping
- Adson Forceps
- Toothed Forceps
Hemostasis
- Mosquito Hemostat
Retraction
- Small Skin Hooks
- Senn Retractor
Needle Holder
- Webster Needle Holder
Back Table Setup
Prepare:
- Sterile towels
- Saline
- Syringe
- Local anesthetic
- Bulb syringe
- Gauze
- Sutures
- Dressing materials
Postoperative Care
- Immediate active finger motion
- Remove bulky dressing after 24–48 hours
- Encourage tendon gliding exercises
- Maintain wound cleanliness
- Suture absorption or removal according to surgeon preference
- Return to daily activities as tolerated
Potential Complications
Possible complications include:
- Infection
- Injury to the digital nerve
- Injury to the flexor tendon
- Persistent triggering
- Recurrence
- Finger stiffness
- Loss of flexion
💎OR Nurse Pearls
✔ Confirm the correct finger before prepping.
✔ Keep the incision centered over the A1 pulley.
✔ Protect the digital nerves throughout the procedure.
✔ Ensure only the A1 pulley is released.
✔ Before closure, always ask the patient to actively flex and extend the finger (under local anesthesia) to confirm complete resolution of triggering.
✔ Prepare a small hand set—this is a short procedure, but meticulous instrument organization improves efficiency.
✅30-Second OR Checklist
✅ Correct patient and operative finger confirmed
✅ Local anesthetic administered
✅ Tourniquet applied
✅ #15 blade available
✅ Tenotomy scissors ready
✅ Small retractors prepared
✅ Saline irrigation ready
✅ Absorbable sutures prepared
✅ Bulky dressing available
Frequently Asked Questions
Why is only the A1 pulley released?
The A1 pulley is the primary site of tendon constriction. Releasing it restores smooth tendon gliding while preserving overall pulley function.
Is fluoroscopy required?
No. Trigger finger release is performed using anatomical landmarks and does not require fluoroscopic guidance.
Can the patient move the finger during surgery?
Yes. Because the procedure is usually performed under local anesthesia, the patient can actively flex and extend the finger intraoperatively to confirm successful release.
How long does the surgery take?
Most trigger finger releases are completed in approximately 10–20 minutes.
Conclusion
Trigger Finger Release is a straightforward yet highly effective procedure for treating symptomatic stenosing flexor tenosynovitis when conservative management fails. For operating room nurses, understanding the anatomy of the A1 pulley, recognizing structures at risk, and preparing the appropriate instruments are essential to ensuring a smooth and efficient operation. Careful protection of the digital neurovascular bundles, complete release of the A1 pulley, and intraoperative confirmation of free tendon gliding are the key principles that contribute to excellent patient outcomes.