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Related Experiment Video

Updated: Oct 25, 2025

Catheterization of the Carotid Artery and Jugular Vein to Perform Hemodynamic Measures, Infusions and Blood Sampling in a Conscious Rat Model

Catheterization of the Carotid Artery and Jugular Vein to Perform Hemodynamic Measures, Infusions and Blood Sampling in a Conscious Rat Model

Published on: January 30, 2015

Endovascular catheter manometry reliability: a benchtop validation study.

Daniel M Heiferman¹, Linh N Le², David Klinger²

¹1Semmes-Murphey Clinic, Department of Neurological Surgery, Memphis, Tennessee.

Journal of Neurosurgery

|August 6, 2021

Summary

This summary is machine-generated.

Accurate mean pressure readings are possible with small microcatheters (0.013-inch ID). However, achieving 90% accuracy for pulse pressure and waveform analysis requires larger microcatheters (≥ 0.031-inch ID).

Keywords:

endovascular procedures endovascular technique interventional neurosurgery vascular disorders venous sinus manometry venous sinus stenosis venous sinus stent

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Area of Science:

Neuroendovascular Surgery
Biomedical Engineering
Medical Device Technology

Background:

Catheter manometry is crucial for evaluating cerebrovascular conditions in neuroendovascular surgery.
Validation of pressure data accuracy across diverse catheter configurations is essential for reliable clinical application.

Purpose of the Study:

To assess the accuracy of pressure measurements using various guide and microcatheter setups in a simulated cerebrovascular environment.
To determine the minimum catheter dimensions required for accurate assessment of cerebrovascular pressure parameters.

Main Methods:

Utilized a silicone human vascular model with a pulsatile pump to simulate blood flow.
Recorded systolic, diastolic, mean, and pulse pressures, along with waveform area, across 24 different catheter arrangements.
Employed linear regression to correlate microcatheter transduction area with relative pulse pressure, setting a ≥ 90% accuracy threshold.

Main Results:

Mean pressure measurements showed minimal variation (< 4%) across all tested catheter setups.
A strong linear correlation (r² = 0.843) was observed between microcatheter transduction area and relative pulse pressure, with 0.50 mm² (0.031-inch ID) as a key threshold.
Obstructed microcatheters within guide catheters necessitated a fourfold larger transduction area for accurate pulse pressure readings compared to unobstructed ones.

Conclusions:

Mean pressure can be accurately measured using microcatheters as small as 0.013-inch inner diameter (ID).
Accurate pulse pressure and waveform morphology assessment generally requires microcatheters of 0.031-inch ID or larger, though 0.027-inch ID achieved 85% accuracy.
Guide catheter systems with smaller microcatheters (≤ 0.042-inch outer diameter) enable accurate pulse pressure transduction; further clinical validation is recommended.