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Related Experiment Video

Updated: Jul 17, 2026

High-Resolution Endocardial and Epicardial Optical Mapping in a Sheep Model of Stretch-Induced Atrial Fibrillation

High-Resolution Endocardial and Epicardial Optical Mapping in a Sheep Model of Stretch-Induced Atrial Fibrillation

Published on: July 29, 2011

Triggering at the distal A2 pulley.

M Nagaoka¹, T Yamaguchi, S Nagao

¹Orthopaedic Department, Surugadai Nihon University Hospital, Tokyo, Japan. mnagaoka@mub.biglobe.ne.jp

The Journal of Hand Surgery, European Volume

|January 16, 2007

Summary

Triggering of the A2 pulley, often caused by tendon enlargement, can be effectively treated. Surgical interventions like reduction tenoplasty and pulley release provided relief in two reported cases.

Area of Science:

Hand Surgery
Orthopedics
Musculoskeletal Disorders

Background:

Triggering is a common condition affecting the hand.
The A2 pulley is crucial for flexor tendon function.
Tendon enlargement can lead to pulley system dysfunction.

Observation:

Two cases of triggering at the distal A2 pulley were observed.
Case 1 involved enlargement of the flexor digitorum profundus (FDP) tendon.
Case 2 involved enlargement of both slips of the flexor digitorum superficialis (FDS) tendon.

Findings:

Both cases presented with distal A2 pulley triggering.
Surgical intervention included reduction tenoplasty and short releases (venting) of the distal A2 pulley.
These procedures successfully relieved the triggering symptoms in both patients.

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Implications:

Reduction tenoplasty and A2 pulley venting are effective treatments for FDP and FDS tendon enlargement causing triggering.
Understanding the specific tendon involvement aids in targeted surgical planning.
These findings contribute to the management of pulley-related hand pathologies.