Surgical retractor system

Abstract

The present invention provides an improved surgical retractor system useful for holding tissue away from a surgical site during a medical or dental procedure. In one embodiment, the surgical retractor system is comprised of a tubular member, such as a cannula, and a retractor member. In an embodiment, the retractor member may be ring shaped. The retractor member preferably may have an opening therethrough for receiving the cannula. An engaging member associated with the retractor member may be provided for rotatably engaging the cannula. In one embodiment, the cannula may have external threads that are releaseably engaged with the engaging member and allows the degree or amount of tissue retraction to be adjusted. The cannula may be configured to be used with and secured to a handle to facilitate using the retractor system. A method of using the retractor system is also disclosed.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This is a continuation-in-part of U.S. patent application Ser. No. 09 / 742,254 filed Dec. 20, 2000, entitled “Universal Handle,” which is incorporated herein by reference.BACKGROUND OF THE INVENTION [0002] The present invention generally relates to surgical instruments used in surgical procedures, and more particularly to an improved handle that permits various instruments to be releaseably attached for quicker and easier interchange. [0003] The development of newer minimally invasive surgical techniques, such as laparoscopic surgery, have allowed surgeons to successfully perform numerous operative procedures in many instances which in the past required the need for large surgical incisions. In this newer procedure, one or several very small incisions are made in the patient through which various surgical instruments may be used to perform the required surgical procedure. Minimally invasive surgery offers benefits which include creating ...

AI Technical Summary

Benefits of technology

[0017] In accordance with another embodiment, at least one biasing member is provided which biases the slider pin toward its extended position. Preferably, the biasing member is a helical spring. In one embodiment, the biasing member may be held by a recess provided in the handle slider. The handle lock assembly may be attached to the grasping portion of the handle by welding. The handle including the grasping portion and handle lock assembly may be made of stainless steel, however, it may be made of any material suitable for the intended application. The grasping portion of the handle may be hollow which reduces the cost and weight of the handle.

[0023] The present invention provides an improved surgical retractor system useful for holding tissue away from a surgical site during a medical or dental procedure. In one embodiment, the surgical retractor system is comprised of a tubular member, such as a cannula, and a retractor member. In an embodiment, the retractor member may be ring shaped. The retractor member preferably may have an opening therethrough for receiving the cannula. An engaging member associated with the retractor member may be provided for rotatably engaging the cannula. In one embodiment, the cannula may have external threads disposed on at least a portion thereof that are rotatably and releaseably engaged with the engaging member and allows the degree or amount of tissue retraction to be adjusted. The cannula may be configured to be used with and secured to a handle to facilitate using the retractor system.

[0027] A cheek retractor system is provided which may comprise a cannula having threads disposed on at least a portion of the cannula, a retractor member having an opening therethrough for receiving the cannula, and an engaging member associated with the retractor member. The engaging member may rotatably engage the cannula. In one embodiment, the cannula comprises a distal end and a proximal end. A window may be provided at the proximal end of the cannula. The window may be used for facilitating observation and / or irrigation of the surgical site.

Problems solved by technology

The permanent type attachment does not allow the surgeon to interchange different kinds or sizes of surgical instruments.

This reduced flexibility for the surgeon and increased prices for each trocar unit which must contain both a handle and permanently affixed cannula.

Overall inventory costs are thereby also increased.

Although the semi-permanent type couplings offer interchangeability of surgical instruments, they too have been problematic.

Using set screws or threaded coupling of the cannula to the handle makes changing instruments cumbersome, especially when it must be done during the exigencies of a surgical procedure.

While offering improvement, the coupling described in the Hearn patent does not positively lock the cannula to the handle in a manner that requires the surgeon to unlock the cannula from the handle.

The cannula / retractor member combination, however, has proven difficult for the surgeon to assemble and adjust in situ during the surgical procedure.

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