Complications following operative versus nonoperatively managed isolated distal third ulna shaft fractures: a retrospective single-institution cohort study - Scorecard - MDSpire
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Outcomes of Surgical versus Conservative Treatment for Isolated Distal Third Ulna Shaft Fractures: A Retrospective Cohort Analysis from a Single Institution

  • By

  • Kathryn Schultz

  • Joyce En-Hua Wang

  • Brock Manley

  • Kacy Peek

  • September 23, 2026

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Clinical Scorecard: Outcomes of Surgical versus Conservative Treatment for Isolated Distal Third Ulna Shaft Fractures: A Retrospective Cohort Analysis from a Single Institution

At a Glance

CategoryDetail
ConditionIsolated Distal Third Ulna Shaft Fractures
Key MechanismsInjury mechanisms include motor vehicle collisions, direct impact, and ground-level falls.
Target PopulationSkeletally mature patients > 18 years old with isolated distal third ulnar shaft fractures.
Care SettingSingle academic institution

Key Highlights

  • Annual incidence of distal ulna fractures is 74 cases per 100,000 patients.
  • Operative treatment has not shown superiority over nonoperative management.
  • Distal-third ulnar fractures have a distinct healing profile compared to midshaft fractures.
  • Complication rates include nonunion and complex regional pain syndrome (CRPS).
  • Follow-up duration averaged 30.5 weeks across the cohort.

Guideline-Based Recommendations

Diagnosis

  • Fractures defined as injuries located within the distal one-third of the ulnar shaft.

Management

  • No absolute indications for surgical fixation; both operative and nonoperative treatments are considered.

Monitoring & Follow-up

  • Follow-up imaging to assess radiographic union required at final follow-up.

Risks

  • Risks of nonunion and complications such as CRPS and hardware removal in operatively treated patients.

Patient & Prescribing Data

Patients with isolated distal third ulnar shaft fractures.

Operative cohort had a lower proportion of males compared to the nonoperative cohort.

Clinical Best Practices

  • Utilize an intention-to-treat framework for analysis.
  • Assess pain using the Visual Analog Scale (VAS) at follow-up.
  • Consider demographic factors such as age and sex when evaluating treatment outcomes.

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