Luera Kusachka

**Luer locking pliers** are a medical instrument that is used to suction air from a needle when drawing blood or other body fluids for testing. It is commonly used in medical laboratories for blood testing. This device is a hand pump that is compressed by pressing a special lever, allowing fluid to be withdrawn from a puncture needle.

**Principle of action:** - when the tip of a sharp knife on the outer sheath of a needle catheter or syringe enters its lumen, the sheath is immediately cut through; - in this case, as a result of a sharp rarefaction, the air through the hole formed at the puncture site of the inner membrane quickly leaves the lumen and at the same time blood is expelled;

Another method is to suck out the piston. To do this, you need to retract the syringe plunger, after which you can start using a file. The file must be inserted between the piston and the insulin guide and, using rotation, create friction as when processing a file on metal. You can also use any other object, the main thing is that its size can completely hug the piston. It is important not to apply too much force to the file, otherwise the piston may be damaged. It is also worth noting that some experts recommend using another file, the so-called medical one, because it has more teeth and they will not break during work. Using both methods you can achieve the desired goal.

Luer lock cutters are medical instruments that are used to remove a catheter from a vein or artery after a blood draw. The name luer comes from the Latin word lues, meaning syphilis, and refers to a venereal disease that was transmitted in medieval Europe through blood transfusions. This tool is a pliers with two blades with rounded edges, located parallel to each other. They are designed to grab and pull out a catheter that has been left inside a patient's veins after a procedure. Luera cutters work as follows: The end of the catheter becomes the center of one of the paired blades that wrap around it. The other end of the forceps then wraps around the base of the catheter and provides an easy grip. After this, the specialist turns the forceps over and slowly removes