Patent ID: 9033927
Filing Date: 2015-05-19
Classification: A61M

Abstract:
1. A catheter insertion device which comprises in combination: a cannula assembly having a catheter detachably attached to a catheter holder at the distal end and at least one attachment site at the proximal end, and having a lumen extending from the distal end to the proximal end; a guide needle mounted on a needle hub attached to a flash back chamber of the guide needle for positioning the cannula assembly to an operative position and sliding or moving the guide needle, wherein the catheter is slidably coaxially mounted on the outer circumference of the guide needle wherein the guide needle is in fluid communication with the lumen; a safety transfer chamber assembly detachably connected to the cannula assembly at the attachment site through a front cap, wherein the safety transfer chamber assembly comprises an outer sleeve slidably mounted around an inner sleeve, the needle hub projecting radially outward of the inner and outer sleeves to facilitate gripping thereof and cooperating with the inner sleeve to form a first complementary interlocking mechanism (P) at a first locking position wherein, upon retracting the guide needle from the catheter, the needle hub interacts with the inner sleeve to prevent forward movement of the guide needle and reinsertion thereof in the catheter, further retraction of the needle hub causing the inner sleeve to retract within the outer sleeve, the inner and outer sleeves being equipped with a second complementary interlocking mechanism such that in a fully retracted position of the inner sleeve, the guide needle is completely enclosed within the inner sleeve and the outer sleeve of the safety transfer chamber assembly and the inner sleeve locks with the outer sleeve at a second locking position, thereby preventing further axial or rotational movement of the two sleeves with respect to each other such that reuse of the guide needle is completely prevented.