The needle-free infusion connector is one of the important components in the infusion line. In the past two decades of development, it has inadvertently increased the risk of catheter-related bloodstream infections.


Choose the best designed needleless infusion connector to prevent blood infection
Simple internal structure, closed liquid passage;

Transparent appearance can observe the internal flushing situation;

The surface of the tight, closed and flat joint is easier to fully disinfect.



Faced with a wide variety of brands and models, the internal structure, functional principle, scope of application and maintenance methods of the infusion connector are not the same, and different operation processes are required to use it correctly. These all cause confusion to clinical medical personnel.

Let's talk about the design features of infusion joints from the perspective of infection control

1. Connector diaphragm surface
The smooth outer diaphragm surface can make disinfection more thorough, reduce the gap around the piston, and is easy to colonize bacteria and there is a risk of infection.


2. Diaphragm closed
The infusion connector is tightly connected with the screw-infusion set or syringe, forming a needle-free closed infusion system, maintaining the tightness and integrity of the vascular access, and reducing the chance of contamination.

3. Internal mechanism
The infusion connector with a simple internal structure, the most direct fluid path, and no movable parts reduce the risk of catheter-related bloodstream infections.

4. Liquid path
The infusion joint of the vertical system is conducive to full flushing and reduces the risk of infection caused by bacterial colonization of the biofilm on the inner surface of the joint.

5. Dead space
Directly related to the design of the liquid passage, indirect or tortuous liquid passages often form dead cavities that cannot be thoroughly rinsed.

6. Clamping sequence
Mechanical valve type infusion joints are divided into positive pressure and negative pressure, resulting in different clamping sequence. The ideal infusion connector does not have the clamping sequence problem, or only one clamping sequence is used (for example, all negative pressures, all positive pressures or neutral pressures), so that medical personnel can operate correctly.


7. Standard operating methods
Standard operation method of positive pressure sealing tube for negative pressure infusion joint:
Seal the tube clamp first, then disconnect the syringe

Standard operation method of positive pressure sealing tube for positive pressure infusion joint:
Disconnect the syringe before clamping the tube clamp



8. Visibility
The transparent visibility makes it easy to observe and evaluate the flow path, and can directly judge whether the flushing pipe and the sealing pipe are thorough, and reduce the adhesion and diffusion of bacteria at the joint and pollution.


9. Blood reflux
Blood backflow increases the risk of catheter blockage and bacterial biofilm formation, and the ideal connector with its positive pressure design reduces or prevents blood backflow.


10. Flushing plan
Some needle-free infusion connectors are designed to be flushed with heparin to reduce the risk of blockages, and flushing with heparin may increase heparin-induced thrombocytopenia in some patients. The needleless infusion connector that can be flushed with physiological saline instead of heparin-containing solution avoids the potential risk of heparin-induced side effects.





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