Structure and composition of a three-part syringe
 Dec 08, 2022|View:532

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A three-part syringe means that the main part of the syringe consists of three parts: the barrel, the plunger, and the gasket(rubber stopper).


Barrel
The barrel of a syringe is the main body of the syringe, and it is where the medication is placed before it is injected. The graduated markings on the barrel indicate the volume of medication that is inside.


Plunger
The plunger is a rod that fits inside the barrel. It is used to draw the fluid into the syringe and to inject it into the body.


Gasket
The gasket, also known as the rubber stopper, is located at the base of the plunger. Its function is to create a seal between the plunger and the barrel, which helps to prevent the medication from leaking out of the syringe.


In summary, the functions of the barrel, plunger, and gasket in a syringe are to hold the medication, push the medication out of the syringe, and create a seal to prevent leakage, respectively. Together, these components work to accurately and safely inject medication into the body.


Depending on the way the syringe is connected to the needle, it can be divided into luer lock and luer slip types. The luer lock fitting and luer slip fitting are two types of connections that are commonly used on syringes. These fittings are used to attach the needle to the barrel of the syringe, and they help to ensure that the needle is securely attached and will not come off during use.

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Luer Lock
The luer lock fitting is a type of threaded connection that is used to attach the needle to the syringe barrel. The needle is then twisted into place and locked into the barrel by turning it clockwise. This creates a secure, leak-proof connection that is difficult to accidentally detach.


Luer Slip
The luer slip fitting is a type of friction-based connection that is used to attach the needle to the syringe barrel. The needle is then pushed into the barrel until it is securely seated. This creates a tight, leak-proof connection that can be easily attached and detached by pushing and pulling on the needle.


In summary, the luer lock fitting and luer slip fitting are two types of connections that are commonly used on syringes. The luer lock fitting is a threaded connection that is locked into place, while the luer slip fitting is a friction-based connection that is easily attached and detached. Both fittings help to ensure that the needle is securely attached to the syringe barrel and will not come off during use.

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There are two kinds of luer slip syringes, centric luer slip tip and eccentric luer slip tip. The eccentric luer slip tip is generally used for venipunctures and aspirational fluids, allowing close proximity to the skin.