Medical Check Valves for Infusion, TIVA and Contrast Media Applications
Precision Flow Control in Medical Infusion Lines
TurtleValve check valves are designed to deliver precise and reliable flow control for demanding medical environments. Featuring an optimised internal geometry, these valves ensure effective sealing with minimal leakage while maintaining a narrow and controlled cracking pressure range.
Manufactured using chemically resistant polymers and medical-grade silicone components, TurtleValve check valves are compatible with demanding sterilisation methods and suitable for high-performance medical applications, including infusion therapy, vascular access devices, imaging equipment, and drug delivery systems.
In infusion therapy, check valves play a critical role in preventing backflow, reducing contamination risks, protecting sensitive devices, and maintaining stable fluid pathways under varying pressure conditions.
Where Are Check Valves Used in Infusion Systems?
Check valves can be integrated into several types of infusion and vascular access devices, depending on treatment duration, required flow rates, and clinical application.
Different infusion applications require different valve characteristics, particularly regarding cracking pressure, chemical resistance, and pressure performance.
Infusion and Vascular Access Systems
Non-Tunneled Central Venous Catheter
Used for short-term treatments, typically up to two or three weeks, mainly in ICU and emergency applications such as rapid drug administration, hemodynamic monitoring, and parenteral nutrition, where stable flow control and reflux prevention are essential.
Peripherally Inserted Central Catheter (PICC Line)
Designed for medium to long-term therapies, PICC systems are commonly used for chemotherapy, antibiotic delivery, intravenous nutrition, and repeated blood sampling.
These systems frequently combine needle-free connectors and check valves to improve both access safety and one-way flow control.
Tunneled Catheters and Implanted Ports
Used for long-term therapies such as dialysis, oncology, and chronic treatments, these devices require reliable flow management and stable sealing performance over extended periods of use.
High-Pressure Infusion Applications
TIVA Systems
In Total Intravenous Anaesthesia (TIVA) systems, precise drug delivery and pressure stability are critical.
Check valves are used to:
- Prevent reverse flow between drug lines
- Reduce cross-contamination between medications
- Maintain controlled pressure conditions
- Improve dosing consistency
Certain TIVA applications may require controlled cracking pressures around 175 ± 25 mbar to ensure stable and predictable valve opening behaviour.
Medical Imaging and Contrast Media Delivery
Check valves are also widely used in infusion systems designed for medical imaging applications, including:
- CT contrast injection systems
- MRI contrast administration
- Nuclear medicine
- Radiopharmaceutical delivery systems
These applications often involve high injection pressures, rapid flow rates, and chemically aggressive fluids.
Certain contrast media injection systems may operate at pressures up to 300 psi, requiring valves with reliable sealing performance, controlled cracking pressure, high-pressure resistance, and strong chemical compatibility.
Typical Pressure Conditions in Infusion Applications
|
Application |
Typical Pressure |
Valve Requirement |
|
Standard IV infusion |
Low pressure (<2 psi) |
Low cracking pressure |
|
PICC systems |
Low to medium pressure |
Anti-reflux performance |
|
TIVA |
Controlled |
Precise creaking pressure |
|
Contrast media injection |
High |
High-pressure resistance |
|
Radiopharmaceutical delivery |
Medium to high pressure |
Chemical compatibility |
The Importance of Cracking Pressure
The cracking pressure defines the pressure required for the valve to open and allow fluid flow.
Selecting the appropriate cracking pressure is essential to prevent backflow, maintain stable flow conditions, and ensure reliable device performance.
Designed for Demanding Medical Applications
Through vertically integrated manufacturing capabilities, TurtleValve supports the complete development of customised check valve solutions tailored to specific pressure requirements, flow characteristics, and medical device integration needs.