Table of Contents

Y Port IV Tubing

infusion sets with Y injection site


The Y port IV tubing is an IV tubing with a Y injection port. The IV tubing serves as a passageway for fluid being delivered to the patient. The Y port on the IV tubing is used to add drugs and other medications into the tubing during infusion. The IV tubing is mainly made up of flexible PVC tubing. Some parts of IV infusion set are attached to the tube, each performing a distinct but very much-needed function.

The transfer of the IV fluid is facilitated by gravitational force. Thus, during the infusion, the container is put high above the patient. The distal end of the IV tubing is equipped with a plastic spike that pierces the rubber plug of the IV container. The proximal end is provided with a hypodermic needle that pierces the vein of the patient.

infusion set
Disposable Y port IV tubing

Parts of IV infusion set

The infusion set parts, collectively known as IV parts, consist of a spike with a cap and air vent, a drip chamber with a fluid filter, a roller regulator, a Y injection port, a rotating Luer lock connector, and a hypodermic needle and tube. These IV parts serve essential functions in intravenous administration, ensuring accurate fluid delivery, air control, and compatibility with various medical applications.

Plastic spike with cap and air vent

To connect the entire Y port IV tubing to the container of the IV fluid, the medical staff should prick the rubber plug with the plastic spike and immerse the tip in the IV fluid. In effect, the fluid could now enter the spike tip and reach its way into the drip chamber.

To maintain the clean condition of the spike when not used, the medical staff should cover it with a cap. The cleanliness condition of the plastic spike must be maintained at all times because, as mentioned in the preceding, it enters the container of the IV fluid and touches the IV fluid itself. The protector must ensure that no debris and other unnecessary substances have attached themselves to the plastic spike. 

drip chamber with spike and filter
Drip chamber with spike and filter

The air vent allows air to enter the container of the IV fluid. Going over the surface of the fluid, the air subsequently exerts downward pressure to hasten the flow. The air vent is precisely located at the inferior portion of the plastic spike.   

The plastic spike has a total length of 54 mm, and it is made up of acrylonitrile butadiene styrene (ABS). The ABS provides favorable mechanical properties to the structure, such as more impact resistance, toughness, and rigidity than other commonly used polymers. However, this part needs to be rigid and tough because it has to prick the rubber plug of the IV container, as mentioned in the preceding. 

Drip chamber 

This is the plastic and compressible chamber that is located below the base of the spike. When the fluid enters the IV tubing, it is collected first in the drip chamber, and it is here where the flow rate is counted and where to find out if the fluid is flowing.

According to the flow rate, the IV tubing can be classified into microdrip tubing and macrodrip tubing. Macrodrip tubing delivers 10, 15, or 20 gtts/ml. Microdrip tubing set delivers 60 drops/ml. Macrodrip tubing is used for routine primary infusions. Microdrip tubing is used mostly in pediatric or neonatal care when small amounts of fluids are to be administered over a long period. According to the drip chamber size, drip chambers are be classified to 48mm, 50mm, 54mm, and 62mm, etc.

Our Y port IV tubing has a drip chamber with a length of 48 mm. It is made up of polyvinyl chloride (PVC), a synthetic plastic polymer. Added with plasticizers, the PVC is made flexible and capable of being compressed when needed, as in reducing the amount of fluid that has entered the drip chamber.       

IV drip chamber
IV drip chamber

Fluid filter

The fluid filter is the most inferior part of the drip chamber when the fluid being infused is suspended. It removes particulates, debris, or pathogenic microorganisms that have admixed with the IV fluid, ensuring that they do not enter the patient’s circulatory system. 

Roller regulator

The roller moves along the plastic tubing, and it is located between the drip chamber and the Y injection site. Its primary function is to ensure that the prescribed flow rate of the IV fluid is followed.

With our existing product, the roller regulator has a length of 55 mm for a tube with a 4.0 mm diameter. It is made up of acrylonitrile butadiene styrene (ABS). This compound provides the roller clamps with more appropriate mechanical properties, such as impact resistance, toughness, and rigidity, compared with other common polymers.

flow regulator
Roller regulator

Y injection port

The injection port is situated on the IV tubing before the rotating Luer lock connector. It is here where drugs and other medications may be administered while the infusion is going on.

The plastic part is made up of PVC or ABS. The injection port is made up of latex or latex-free material. It depends on the patient’s needs. A latex pad may trigger a latex allergy, whereas a latex-free pad is a suitable replacement that eliminates the risk of an allergic reaction.

Y injection site
Y injection port

Rotating Luer lock connector

This part is almost at the end of the Y port IV tubing. It holds and practically connects the hypodermic needle to the tubing.

The Luer lock connector provides some flexibility in managing the hypodermic needle. If there is a need to change or replace the needle, we can detach it from the Luer lock connector. If not, the lock ensures that the needle will not be dislodged unnecessarily. The Luer lock connector has a length of 35 mm, and it is made up of ABS.

Rotating Luer lock connector
Rotating Luer lock connector

Hypodermic needle 

The hypodermic needle is the last part of the Y port IV tubing. Aside from piercing the vein of the patient, it connects the patient to the whole Y site IV tubing.

disposable hypodermic needle
Disposable hypodermic needle

In addition, in considerable measure, the hypodermic needle also controls the flow rate of the IV fluid. Even if you set the roller regulator to the slightest pressure on the tubing, the flow rate will still be slower if the needle has a narrow diameter. Use a needle with a wider diameter, and then you can increase the flow rate. This shows how vital the gauge of the needle is. 

In our current product, the hypodermic needle has a gauge of 21G (0.8 x 38 mm). It comprises polypropylene (PP), also known as polypropene and stainless steel. The PP material is used for the hub of the stainless needle. PP material has high fatigue resistance, so the hub has low breakages.


The tubing is the central part of the Y port IV tubing. Aside from serving as the principal route of the fluid being infused, it serves as the attachment point of all the other IV parts.

It has a length of 150 cm and is made of flexible PVC. Thus, it can be compressed when needed, as in removing some air bubbles along the tube.  

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