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Increasing Pulmonary Artery Pulsatile Flow Improves Hypoxic Pulmonary Hypertension in Piglets
Published on: May 11, 2015
The National Heart, Lung, and Blood Institute Pediatric Circulatory Support Program
J Timothy Baldwin1, Harvey S Borovetz, Brian W Duncan
1Division of Heart and Vascular Diseases, The National Heart, Lung, and Blood Institute, Bethesda, MD 20892-7940, USA. baldwint@nhlbi.nih.gov
Insights
New pediatric circulatory support devices aim to overcome limitations of current short-term options. These novel systems for infants and children focus on reducing infection, bleeding, and thromboembolism risks.
Area of Science:
- Biomedical Engineering
- Pediatric Cardiology
- Medical Device Development
Background:
- Current circulatory support for pediatric patients under 5 years is limited to short-term extracorporeal devices.
- These devices are associated with significant complications, including infection, bleeding, and thromboembolism.
- A critical need exists for advanced, reliable circulatory support solutions for infants and children.
Purpose of the Study:
- To address the limitations of existing pediatric circulatory support systems.
- To develop a family of novel devices for infants and children (2-25 kg) with cardiovascular disease.
- To minimize risks of infection, bleeding, and thromboembolism in pediatric circulatory support.
Main Methods:
- The National Heart, Lung, and Blood Institute funded the development of five distinct device types.
- These include implantable mixed-flow ventricular assist devices (VADs) for different age groups and sizes.
- Other developments include integrated cardiopulmonary assist systems and axial-flow and pulsatile-flow VADs.
Main Results:
- Five novel pediatric circulatory support device concepts were developed.
- The devices are designed for reliable circulatory support in infants and children.
- The goal is to mitigate common complications associated with current support systems.
Conclusions:
- Novel circulatory support devices are being developed to meet the needs of pediatric patients.
- These advanced systems aim to improve outcomes by reducing device-related complications.
- Clinical studies for these devices were anticipated by 2009.
Abstract:
Options for the circulatory support of pediatric patients under the age of 5 years are currently limited to short-term extracorporeal devices, the use of which is often complicated by infection, bleeding, and thromboembolism. Recognizing this void, the National Heart, Lung, and Blood Institute solicited proposals for the development of novel circulatory support systems for infants and children from 2 to 25 kg with congenital or acquired cardiovascular disease. Five contracts were awarded to develop a family of devices that includes (1) an implantable mixed-flow ventricular assist device designed specifically for patients up to 2 years of age, (2) another mixed-flow ventricular assist device that can be implanted intravascularly or extravascularly depending on patient size, (3) compact integrated pediatric cardiopulmonary assist systems, (4) apically implanted axial-flow ventricular assist devices, and (5) pulsatile-flow ventricular assist devices. The common objective for these devices is to reliably provide circulatory support for infants and children while minimizing risks related to infection, bleeding, and thromboembolism. The devices are expected to be ready for clinical studies at the conclusion of the awards in 2009.
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