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Related Experiment Video

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An improved spreadsheet for calculating limb length discrepancy and epiphysiodesis timing using the multiplier

Gavin Mills1, Scott Nelson2

  • 1School of Medicine, Loma Linda University, 11175 Campus St, Loma Linda, CA, 92350, USA. gmills@llu.edu.

Journal of Children'S Orthopaedics
|July 1, 2016
PubMed
Summary

This study presents an improved Excel spreadsheet for predicting pediatric limb length discrepancy (LLD) at skeletal maturity. The tool enhances accuracy and user-friendliness for calculating LLD and timing epiphysiodesis, aiding clinical documentation.

Keywords:
EpiphysiodesisLimb length discrepancyMultiplier methodSpreadsheet

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Area of Science:

  • Orthopedic surgery
  • Pediatric orthopedics
  • Biomechanical analysis

Background:

  • Limb length discrepancy (LLD) is a common pediatric orthopedic condition.
  • Accurate prediction of LLD at skeletal maturity is crucial for treatment planning, including epiphysiodesis.
  • Existing tools for LLD prediction and epiphysiodesis timing can be cumbersome or prone to error.

Purpose of the Study:

  • To develop and validate an improved Excel spreadsheet for predicting limb length discrepancy (LLD) at skeletal maturity in pediatric patients.
  • To enhance the efficiency and user-friendliness of LLD calculations and epiphysiodesis timing.
  • To facilitate data integration into electronic medical records (EMRs).

Main Methods:

  • A critical review of existing LLD prediction tools was conducted to identify limitations.
  • An improved Excel spreadsheet was developed incorporating patient age, sex, limb lengths, and prior lengthening surgeries.
  • The spreadsheet's accuracy and usability were compared against manual calculations and other multiplier tools.

Main Results:

  • The developed spreadsheet accurately predicts LLD at skeletal maturity and optimal timing for epiphysiodesis.
  • The tool incorporates functions for calculating predicted leg lengths after previous lengthening procedures.
  • Concise, single-page worksheets are provided for developmental LLD, congenital LLD, and height prediction.

Conclusions:

  • The updated Excel spreadsheet offers a more efficient and user-friendly method for calculating LLD and timing epiphysiodesis.
  • The spreadsheet's output can be easily pasted into EMRs, improving documentation efficiency.
  • This tool is recommended for both clinical practice and educational purposes in pediatric orthopedics.