Article
Factors of distal ulnar morphology to affect symptomatic ECU subluxation and clinical results of anatomic ECU tendon sheath reconstruction
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Published: | February 6, 2020 |
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Objectives/Interrogation: To evaluate the association between distal ulnar morphology and symptomatic extensor carpi ulnaris(ECU) subluxation and assess the results of anatomic ECU tendon sheath reconstruction.
Methods: Twelve patients with symptomatic ECU subluxation were included. They all treated with anatomic reconstruction of ECU subsheath. Preoperative and final range of motion of wrist joint, grip strength, disabilities of the arm, shoulder, and Hand(DASH) score, and patient related wrist evaluation score(PRWE) were checked to assess the clinical results. At final follow-up, we used ultrasound sonography to check the ECU stability. Ulnar variance, ulnar styloid process length, and ECU groove depth were measured to evaluate the association between distal ulnar morphology and symptomatic ECU subluxation. 24 wrists without ECU subluxation and 24 wrists with asymptomatic ECU subluxation were used as controls.
Results: There were statistically significant difference in ECU groove depth between control and asymptomatic ECU subluxation groups. However, ECU groove depth, ulnar styloid length and ulnar variance showed no significant correlation with symptomatic ECU subluxation. After anatomic reconstruction of ECU subsheath, there was a statistically significant improvement in DASH score, PREW score, grip strength and there was no ECU subluxation at the final ultrasound sonography.
Conclusion: We think that anatomic reconstruction of ECU subsheath is an effective operative method to stabilize ECU and there is no association distal ulnar morphology and symptomatic ECU subluxation, although asymptomatic ECU subluxation has a trend toward shallower ECU groove.