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Related Experiment Video

Updated: Jul 11, 2025

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A generalized canine transfer function accurately reconstructs central aortic pressure waveforms to enable enhanced

Julia C Hotek1, Theodore J Detwiler1, Julio A Chirinos2

  • 1Safety & Exploratory Pharmacology (SEP), Merck & Co., Inc., Rahway, NJ, USA.

Journal of Pharmacological and Toxicological Methods
|November 6, 2023
PubMed
Summary

Researchers developed a canine-specific transfer function to accurately estimate central aortic pressure from abdominal measurements. This tool enables advanced hemodynamic analysis in preclinical blood pressure research.

Keywords:
Aortic pressure waveformPulse wave analysisSafety pharmacologyTelemetryTransfer function

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Area of Science:

  • Cardiovascular Physiology
  • Preclinical Research
  • Biomedical Engineering

Background:

  • Accurate preclinical blood pressure evaluation is crucial for risk assessment.
  • Abdominal aortic pressure is commonly measured but less relevant than proximal aortic pressure for target organs.
  • Existing clinical transfer functions for central hemodynamic analysis lack preclinical analogues.

Purpose of the Study:

  • To develop a canine-specific mathematical transfer function.
  • To reconstruct thoracic aortic pressure waveforms from abdominal aortic data.
  • To enable central hemodynamic analytical methods in preclinical settings.

Main Methods:

  • Recorded simultaneous abdominal and thoracic blood pressures in seven beagle dogs.
  • Administered three pharmacologic standards to induce hemodynamic changes.
  • Developed and validated a generalized transfer function using training and validation groups.

Main Results:

  • High correlation (r² = 0.74-0.99) between measured and synthesized thoracic pressure parameters.
  • No significant differences in hemodynamic indices computed from measured versus synthesized thoracic waveforms.
  • The transfer function accurately reproduced thoracic pressure waves across varying hemodynamic conditions.

Conclusions:

  • A generalized preclinical transfer function can effectively reconstruct thoracic aortic pressure waveforms from abdominal data.
  • This method allows for the application of central hemodynamic analytical methods in preclinical canine models.
  • The developed transfer function enhances the utility of routine preclinical blood pressure evaluation.