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Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...

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C-arm-Free Simultaneous OLIF51 and Percutaneous Pedicle Screw Fixation in a Single Lateral Position
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Syndesmotic reduction: What technique is most accurate?

Calvin J Rushing1

  • 1Dallas Orthopedic and Shoulder Institute, Sunnyvale, TX, USA.

Foot (Edinburgh, Scotland)
|September 20, 2025
PubMed
Summary

Direct visualization of the articular surface is the most reliable method for syndesmotic reduction, outperforming palpation and clamp reduction techniques in cadaveric models. Clamp reduction showed the highest malreduction rates across various injury severities.

Keywords:
Ankle fractureMalreductionStress assessmentSyndesmosisTrauma

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Area of Science:

  • Orthopedic Surgery
  • Anatomy
  • Biomechanics

Background:

  • Syndesmotic injuries often require accurate reduction for optimal outcomes.
  • Current reduction methods vary in reliability, particularly with increasing injury severity.

Purpose of the Study:

  • To compare the reliability of three syndesmotic reduction methods: indirect clamp reduction, direct reduction with incisura palpation, and direct reduction with articular surface visualization.
  • To evaluate these methods across different syndesmotic injury severities (ventral disruption, 2-ligament, and 3-ligament injuries).

Main Methods:

  • Utilized a cadaveric model with eight knee specimens.
  • Induction of various syndesmotic injuries.
  • Assessment of sagittal plane translation using a digital caliper post-reduction.
  • Malreduction defined as >2mm difference from the intact state.

Main Results:

  • Direct reduction with articular surface visualization demonstrated the highest accuracy across all injury types (p > 0.01).
  • Indirect clamp reduction was the least reliable, showing the highest malreduction rates (p = 0.585).
  • Direct reduction with incisura palpation was reliable for 2 and 3-ligament injuries (p = 0.518), but malreduction increased with injury severity.

Conclusions:

  • Direct visualization of the articular surface is the most accurate and reliable method for syndesmotic reduction.
  • The historically used indirect clamp reduction method is unreliable and associated with a high incidence of malreduction.
  • Surgeons should consider the subjectivity and limitations of clamp reduction, favoring direct visualization for improved accuracy.