Needle tip shielding device

摘要

The present invention discloses a catheter instrument 1000 comprising a needle tip shielding device 100. The needle tip shielding device 100 is comprising a body with a rear side 106, a front side 107, an outer surface 108 connecting the rear side 106 and the front side 107, a hole 102 extending from the rear side 106 to the front side 107, a resilient arm 103 extending at an attachment point 105 from the front side 107 of the body, and a longitudinal arm 112. The resilient arm 103 has a resting state, from which it may be forced to yield free passage through the hole 102 in an axial direction of the body. The resilient arm 103 is adapted for protecting a needle tip 304 of a hollow needle 303 extending through the hole 102 in a direction from the rear side 106 to the front side 07, when the resilient arm 103 is in the resting state. The resilient arm 103 has one external point of contact, the point of contact being a contact with the hollow needle 303 when the hollow needle 303 is in a forward position. The longitudinal arm 112 has one external contact point, the contact point being a contact with the hollow needle 303 when the hollow needle 303 is in a forward position. Any straight imaginary line extending longitudinally through the hole 102 in the axial direction of the body coincides with the resilient arm 103, when the resilient arm 103 is in the resting state.

主权项

1. A plastic needle tip shielding device for use inside a catheter hub, the catheter hub having a proximal end and a distal end, the needle tip shielding device comprising:
a body, the body comprising: a rear side; a front side; an outer surface connecting the rear side and the front side; a hole extending from the rear side to the front side, the hole configured to receive a needle therethrough, and defining a longitudinal axis through the body, the longitudinal axis extending in an axial direction between the proximal end and the distal end of the catheter hub; a resilient arm extending from an attachment point on the front side of the body, the resilient arm including a proximal end attached to the attachment point, and a distal end spaced away from the proximal end; a longitudinal arm attached to the distal end of the resilient arm; and at least one protuberance defined on the outer surface of the body, the at least one protuberance contacting, and making at least one imprint in an inner wall portion of the catheter hub; wherein the resilient arm has a resting state, from which it may be forced to yield free passage through the hole in the axial direction, the resilient arm being adapted for protecting or clamping a needle tip of the needle extending through the hole; wherein the attachment point is positioned radially outwardly from the hole; wherein any straight imaginary line extending through the hole in the axial direction coincides with the resilient arm, when the resilient arm is in the resting state; and wherein the at least one protuberance inserted in the at least one corresponding imprint is configured to restrict movement of the needle tip shielding device in the catheter hub.