PROTECTION UNIT FOR NEEDLE Russian patent published in 2006 - IPC A61M5/50 A61M5/32 

FIELD: medicine.

SUBSTANCE: protection unit for needle can be used in medical and surgical instruments. Protection unit has protection aids which interact with needle through sliding. Protection aids have to be combination of, at least, safety providing aids, on one hand, and blocking aids, on the other hand. Safety providing aids have at least one item which upon finishing of movement of needle at backward direction through protective aids, is placed in front of tip of the needle to prevent repeat usage of the same needle. Blocking aids work together with safety providing aids and at the moment when protection unit changes from non-working state to working one, they release safety providing aids which move from blocked position to their unblocked position. According to the other version, protection aids have to be one or several safety tongues which upon finishing movement of needle in backward direction are automatically disposed in front of needle's tip to prevent repeat usage of the same needle. Mentioned tongues keep their distance from the needle till whole pass of the needle is finished when it moves backward. According to the third version, protection unit has ring-scraper to interact with needle. Ring-scraper is disposed inside case at preset distance from back side of back wall of the case.

EFFECT: reduced probability of contact with different fluids extracted from patient's body; prevention of random punching; small size; easiness at usage; simplified design.

20 cl, 13 dwg