The Flexion Initiation Test and an Evidence-Based Diagnostic Algorithm for Distal Biceps Tendon Tears

Area of Science:

• Orthopedic surgery
• Diagnostic imaging
• Musculoskeletal diagnostics

Background:

• Elbow pain is a common complaint.
• Accurate diagnosis of distal biceps tendon tears (DBTT) is crucial for effective treatment.
• Existing diagnostic methods may have limitations in detecting partial tears.

Purpose of the Study:

• To evaluate the flexion initiation test's (FIT) efficacy in detecting distal biceps tendon tears (DBTT).
• To develop a reliable diagnostic algorithm combining the FIT and hook tests for DBTT.

Main Methods:

• Retrospective review of 125 patients with elbow pain.
• FIT and hook tests performed prior to imaging or surgery.
• Surgical or MRI confirmation of tendon integrity.
• Calculation of sensitivity, specificity, and predictive values.

Main Results:

• The combined FIT and hook test algorithm achieved 100% diagnostic accuracy for surgically indicated tears.
• FIT showed 100% sensitivity for surgically indicated tears.
• Hook test had 100% sensitivity for complete ruptures but only 18% for partial tears.

Conclusions:

• The FIT demonstrates high sensitivity (93%) and specificity (96%) for DBTT, particularly effective for partial tears.
• The evidence-based algorithm using FIT and hook tests offers high accuracy for diagnosing complete and partial DBTTs.
• This diagnostic approach can reduce delays, enhance patient education, and facilitate timely surgical repair.