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[Humeral lengthening and deformity correction].

N Yasui¹, H Kawabata, T Nakase

¹Abteilung für Orthopädische Chirurgie, Universität von Osaka, Japan.

|February 9, 2000

Summary

Surgical lengthening of the humerus using external fixators effectively corrected bone deformities in patients with achondroplasia and Apert syndrome. This procedure improved arm function and daily living activities for individuals with short humeri.

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Area of Science:

Orthopedic Surgery
Pediatric Orthopedics
Limb Reconstruction

Background:

Achondroplasia and Apert syndrome often present with bilateral short humeri and associated bone deformities.
Surgical intervention is necessary to improve upper extremity function and activities of daily living.

Observation:

A novel surgical technique involving unilateral external fixators for humerus lengthening and simultaneous deformity correction was applied.
Percutaneous osteotomy and gradual distraction (0.25 mm every 6 hours) were employed.
An additional external fixator was used to correct distal humerus flexion deformity during the waiting period.

Findings:

Nine patients with achondroplasia and one with Apert syndrome underwent the procedure.
Average humerus lengthening was 8 cm (range 7.5-9 cm).

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Average correction of elbow flexion deformity was 20 degrees, with an average healing index of 39.0 days/cm over 312 days.

Implications:

This surgical approach offers a viable solution for humerus lengthening and deformity correction in pediatric patients.
The technique shows promise in enhancing arm function and improving the quality of life for individuals with skeletal dysplasias.
Further research could explore long-term outcomes and refine surgical protocols for limb lengthening in these conditions.