Retractable needle catheter insertion device

摘要

A retractable needle catheter insertion device is provided with a cannula and a needle positioned within the cannula to assist with insertion of the cannula. After insertion of the cannula into a patient, the needle can retract into a protective sleeve that contains the needle in order to reduce the chance that a medical practitioner will be inadvertently stuck by a used needle. The needle is carried by a needle support that is slidably disposed within the sleeve. A spring biases the needle support and needle toward a retracted position, and the device also includes an activation hub that works in conjunction with the needle support to control retraction of the needle. The retraction may be activated manually by the medical practitioner or may be activated automatically. A modular system and method of manufacturing is also provided in which catheters having either manually or automatic retraction can be manufactured using common parts.

主权项

1. A modular system of intravenous catheters comprising a catheter assembly:
a cannula assembly including a cannula and a cannula hub; a needle; a sleeve defining an internal cavity with an opening at a front end of the sleeve; a needle support attached to the needle at a rear portion of the needle, the needle support slidably mounted within the internal cavity of the sleeve for movement of the needle from an extended position to a retracted position, the needle support comprising a first engaging element and a second engaging element; and a retractor that applies a force to the needle support biasing the needle support toward the retracted position; and an activation hub selected from the group consisting of a first activation hub and a second activation hub: wherein the first activation hub is connected to the front end of the sleeve and comprises a manually actuated release mechanism that engages the first engaging element of the needle support to secure the needle support against the biasing force of the retractor; wherein the second activation hub is connected to the front end of the sleeve and comprises an automatically actuated release mechanism that engages the second engaging element of the needle support to secure the needle support against the biasing force of the retractor; and wherein the first activation hub and the second activation hub are interchangeably selected.