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Insertion, Maintenance, and Removal of the Percutaneous Dual Lumen Cannula Right Ventricular Assist Device

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Published on: July 20, 2022

A Two-Stage Ventricular Assist Device for Pediatric Patients.

Sarah Linnemeier, Rosario Giuffrida, Krishnaraj Narayanaswamy

IEEE Transactions on Bio-Medical Engineering

|March 21, 2025

Summary

A novel miniaturized two-stage pump shows feasibility as a left ventricular assist device (LVAD) for pediatric patients with heart failure. This innovative design offers comparable or better hemocompatibility than existing devices, addressing a critical unmet need.

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Last Updated: May 21, 2025

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Published on: July 20, 2022

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Use of a Percutaneous Ventricular Assist Device/Left Atrium to Femoral Artery Bypass System for Cardiogenic Shock

Published on: August 16, 2021

Area of Science:

Biomedical Engineering
Cardiovascular Devices
Pediatric Cardiology

Background:

Pediatric left ventricular failure requires advanced implantable ventricular assist devices (LVADs).
Current LVAD technology presents limitations for small pediatric patients.

Purpose of the Study:

To assess the feasibility of a miniaturized two-stage pump concept for pediatric LVAD application.
To design and analyze a novel pump suitable for small pediatric patients.

Main Methods:

Utilized computational fluid dynamics (CFD) and finite element method (FEM) for pump design and actuation analysis.
Designed and analyzed magnetic and hydrodynamic bearing properties.
Validated hydraulic performance in a flow loop and assessed hemocompatibility numerically against the HeartMate 3.

Main Results:

The Two-Stage Pump achieved 58 mmHg at 1.5 L/min and 6400 rpm.
Hydrodynamic bearings and motor forces confirmed impeller equilibrium and axial stability.
Demonstrated comparable or superior hemocompatibility to the HeartMate 3 at reduced velocity (3.7 m/s), with minimal temperature increase (0.4 K).

Conclusions:

The miniaturized Two-Stage Pump concept is feasible for pediatric LVADs.
The design shows promising results for addressing critical needs in pediatric heart failure support.
This innovative pump technology could significantly advance treatment options for young patients.