Title: Trigger finger/thumb<br/>
Author: Brian Corwell<br/>
<a href='mailto:bcorwell@som.umaryland.edu'>[Click to email author]</a><hr/>
Link: <a href='https://umem.org/educational_pearls/4648/'>https://umem.org/educational_pearls/4648/</a><hr/><p>Trigger finger/thumb</p>
<p>Occurs from mechanical impingement </p>
<p> -Stenosing tenosynovitis</p>
<p>Much more common in patients with diabetes</p>
<p>Causes clicking, catching, locking and pain</p>
<p>Occurs at the A1 pulley </p>
<p>Flexor tendon “catches” as it attempts to glide through a stenotic flexor tendon sheath</p>
<p>Initially, patient's report painless catching or locking of the affected digit during flexion</p>
<p>During finger flexion and extension, pain is caused by inflamed tendon passing through a relatively constricted tendon sheath </p>
<p>Occurs most often in the ring and middle digits</p>
<p>May improve over the course of the day</p>
<p>Diagnoses with active triggering (with digit flexion and extension) and tenderness to palpation at the first annular pulley (A1) which overlies the first MCP joint</p>
<p> -Ask patient to place hand on table face up and gradually fully flex and extend the fingers</p>
<p>May note a palpable nodule of the flexor tendon</p>
<p>Treatment: Activity modification, NSAIDs and splinting (3-6 weeks)</p>
<p>Corticosteroid injection is very effective</p>
<p><a href="https://www.ahta.com.au/client_images/2553101.png">https://www.ahta.com.au/client_images/2553101.png</a></p>