CATHETER DEVICE Russian patent published in 2015 - IPC A61M25/06 A61M5/32 

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to catheter device. Catheter device contains catheter tube, catheter connector, needle, which has needle rod, needle tip and needle connector, as well as needle guard. Needle rod has distal part and proximal part. At least proximal part has main external contour. Extension is provided on needle rod between distal part and proximal part. Needle guard has main part, first and second deviations and distant wall. Main part is made from first material and has channel for needle, passing in axial direction from proximal side of main part through main art to distal side of main part for mobile incorporation of needle rod. Maximal size of section of channel for needle is smaller than maximal size of needle extension. First and second deviations pass in fact in axial direction from distal side of main part. First deviation has distal part and proximal part and distal wall, located transversally on distal part of first deviation. Rigid locking element, made from second material, different from first material, is located in needle guide. Lock element has disc-like shape with through hole of constant diameter, size of which is larger than main diameter of proximal part of needle rod and is smaller than maximal size of said extension.

EFFECT: protection of catheter device against external effort of pressing on needle and prevention of complete removal of needle from guide, when effort for separation of guide is applied, with simultaneous provision of smooth sliding of needle guide along needle rod.

10 cl, 6 dwg