Non-rotational medial pinning with the K-Hammer technique in pediatric supracondylar fractures: a retrospective case-control study - Scorecard - MDSpire

Non-rotational medial pinning with the K-Hammer technique in pediatric supracondylar fractures: a retrospective case-control study

  • By

  • Xiang Zhang

  • Xiaoan Bai

  • Changhong Li

  • Mi Zhou

  • Jiang Chen

  • Guanwen Sun

  • Fan Bai

  • Yijun Zhou

  • July 9, 2026

  • 0 min

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Clinical Scorecard: Medial Pinning Without Rotation Using the K-Hammer Technique for Pediatric Supracondylar Fractures: A Retrospective Case-Control Analysis

At a Glance

CategoryDetail
ConditionPediatric Supracondylar Humeral Fractures
Key MechanismsK-Hammer technique for medial pin insertion reduces risk of ulnar nerve injury.
Target PopulationPediatric patients aged 2–10 years with Gartland type III–IV fractures.
Care SettingRetrospective case-control study in a clinical setting.

Key Highlights

  • K-Hammer group had fewer medial pin attempts (1.0 vs. 2.0, P < 0.001).
  • Shorter operative time in K-Hammer group (32.8 min vs. 37.9 min, P = 0.006).
  • Iatrogenic ulnar nerve injury occurred in 0% of K-Hammer group vs. 11.9% in Freehand group.
  • No secondary displacement or reoperation in either group.
  • Radiographic and functional outcomes were comparable between groups.

Guideline-Based Recommendations

Diagnosis

  • Identify Gartland type III–IV extension-type supracondylar humeral fractures.

Management

  • Use crossed K-wire fixation with two lateral and one medial pin for treatment.

Monitoring & Follow-up

  • Monitor for iatrogenic ulnar nerve injury postoperatively.

Risks

  • Consider the risk of ulnar nerve injury with conventional medial pinning techniques.

Patient & Prescribing Data

Pediatric patients aged 2–10 years with isolated closed extension-type Gartland type III–IV fractures.

K-Hammer technique may reduce the risk of ulnar nerve injury and improve operative efficiency.

Clinical Best Practices

  • Maintain elbow in 30°–60° extension during medial pin insertion.
  • Consider K-Hammer technique as a potential option for medial pin placement.

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