CONMED : "Tissue Specimen Retrieval Bag, Method For Retrieving Tissue" in Patent Application Approval Process (USPTO 20180221007)

Thursday, August 23, 2018

Source: Market Screener

A patent application by the inventors Taylor, James (Bartlett, IL); Thrun, Robert H. (Bloomingdale, IL), filed on April 5, 2018, was made available online on August 9, 2018, according to news reporting originating from Washington, D.C., by NewsRx correspondents (see also CONMED Corporation).

This patent application is assigned to CONMED Corporation (Utica, New York, United States).

The following quote was obtained by the news editors from the background information supplied by the inventors: "This invention relates to a tissue specimen bag and a method for retrieving tissue, and more particularly this invention relates to a folded bag and to a method for deploying the fold while the bag is inside a patient.

"Surgery of the past involved large incisions (typically greater than 10 centimeters in length) to access interior regions of the body.

"In an effort to minimize scarring, infection, pain and other trauma, laparoscopic surgery has been developed. This surgery utilizes a laparoscope, a video camera with a lamp and surgical instruments inserted through small incisions (typically less than 3 centimeters) to better effect surgical repair. The incisions are typically fortified with grommet like devices called trocars so that no trauma to the skin occurs as instruments, sutures, and the like are passed through the incisions.

"Surgery also is performed utilizing the body's natural portals. Recently, stomach surgery has been devised whereby the abdomen and other organs are accessed solely from the patient's mouth, umbilicus and other natural portals.

"Whether performed the old fashioned way, or through laparoscopy, or just utilizing the body's natural portals, virtually all surgeries end up producing tissue waste. Tissue harvesting devices exist for gathering and removing such waste from inside a patient. Care must be taken in removal of the tissue waste. For instance, morcellation in the abdominal cavity has been recognized by the FDA as being potentially dangerous because of the risk of spreading cancer cells. Thus, morcellation has been done within tissue specimen bags.

"Many tissue retrieval devices feature bags positioned at the distal end of the device. These bags invariably remain attached to the device. One such device is taught in U.S.Pat. No. 8,075,567 issued on Dec. 13, 2011, and incorporated herein by reference. This device comprises a bag which reversibly deploys at the end of an introducer tube. It is designed for use in laparoscopic surgeries. However, as of yet, a tissue retrieval bag has not been designed that facilitates morcellation of waste tissue within the retrieval bag.

"A need exists in the art for a tissue retrieval bag which is not associated with a particular surgery modality, or with particular surgical instruments. The bag must be easy to deploy with a minimum number of instruments. A need also exists for a method for harvesting tissue from a patient with minimum effort and hardware."

In addition to the background information obtained for this patent application, NewsRx journalists also obtained the inventors' summary information for this patent application: "An object of this invention is to provide a tissue retrieval bag and a method for harvesting tissue that overcome many of the drawbacks of the prior art.

"Another object of this invention is to provide a stand-alone tissue retrieval bag. A feature of this invention is a fold confined to one region of an opening to the bag. An advantage of this invention is that the fold provides a means for actuating the bag with a single motion by the user.

"Still another object of this invention is to provide a method for harvesting tissue. A feature of this invention is that the mouth of a specimen bag used in the method is reversibly deployed and collapsed at a single point while a second point of the mouth is held stationary by the user. An advantage of the method is that a maximum of two instruments are required to deploy the bag, collect tissue, undeploy the bag, and remove the bag from the patient.

"Yet another object of this invention is to provide a tissue specimen bag for use in a myriad of different surgery modalities. A feature of the bag is a lowermost surface adapted to receive a gripping tool and an uppermost means for actuating closure of the mouth of the bag. An advantage of the invention is its adaption for use in typical surgeries, laparoscopic surgeries, or surgeries involving ingress and egress via natural portals.

"A further object of the present invention is to provide a tissue specimen bag that allows a second trocar to access the interior of the bag. A feature of the present invention is one or more secondary openings on one or more of the sides of the bag. An advantage of the present invention is that the second trocar can be used to place a camera inside the bag, to insufflate the bag, or to do both.

"Another object of the present invention is to provide a tissue specimen bag that can easily be manipulated within a body cavity. A feature of the present invention is a number of tabs that form loops on the exterior surface of the bag. An advantage of the present invention is that the loops allow the surgeon to more easily deploy and orient the bag.

"Still another object of the present invention is to provide a surgical bag with a channel to access the interior of the bag from the outside of the patient. A feature of the present invention is that a channel is formed into the exterior surface of the bag. An advantage of the present invention is that a surgeon does not need to puncture a hole in the bag to provide access for instruments, such as cameras, insufflation devices, and morcellators.

"Still another object of the present invention is to provide a tissue specimen bag that has at least one permanent secondary access point. A feature of the present invention is a tube that is joined to a porthole in the bag. The tube extends from the bag to a place outside the patient. An advantage of the tube is that it provides direct access from the exterior of patient to the interior of the bag. Thus, the surgeon does not have to attempt to puncture the bag while it is inside of the patient in order to gain access to the bags contents.

"Briefly, the invention provides a tissue retrieval bag. The bag comprises a region of the bag defining an opening; an exterior surface of the bag depending from the opening; and a channel formed into the exterior surface of the bag, wherein the channel provides access to the interior of the bag through the exterior surface. Also provided is a tissue retrieval bag comprised of a region of the bag defining an opening; an exterior surface of the bag depending from the opening; and at least one porthole on the exterior of the bag, wherein at least one tube extends from the at least one porthole."

The claims supplied by the inventors are:

"1. A tissue retrieval bag, the bag comprising: a region of the bag defining an opening; an exterior surface of the bag depending from the opening; and a channel formed into the exterior surface of the bag, wherein the channel provides access to the interior of the bag through the exterior surface.

"2. The bag of claim 1, wherein the bag and channel are formed from rip-stop nylon.

"3. The bag of claim 1, wherein the bag and channel are formed from the same continuous piece of material.

"4. The bag of claim 1, wherein the channel is of such a length that it extends outside a patient's body while the rest of the bag is inside a patient's body.

"5. The bag of claim 1 further comprising at least one grasping loop located on the exterior surface of the bag.

"6. The bag of claim 5, wherein the perimeter of the loop is reinforced with double-stitching.

"7. A method of forming a tissue retrieval bag, said method comprising the steps of: a. providing a substrate with a longitudinal axis at the center of the substrate, wherein portions of the substrate on opposite sides of the longitudinal axis are substantially structurally mirrored and wherein the distal sides of the substrate feature an extending strip of the substrate material; b. folding the substrate in half along the longitudinal axis such that the mirrored structures overlap; and c. joining the two halves together at a region proximal to the distal edge of each half while maintaining an opening at the farthest end of the extending strip and at the top of the substrate.

"8. The method of claim 7 wherein the substrate is rip-stop nylon.

"9. The method of claim 7 wherein the joining step is accomplished via radio frequency welding.

"10. A tissue retrieval bag, the bag comprising: a region of the bag defining an opening; an exterior surface of the bag depending from the opening; and at least one porthole on the exterior of the bag, wherein at least one tube extends from the at least one porthole.

"11. The bag as recited in claim 10, wherein the tube is initially sealed prior to deployment in a patient.

"12. The bag as recited in claim 11, wherein the bag and tube are made from rip-stop nylon and wherein the tube is radio-frequency welded to the bag.

"13. The bag as recited in claim 10, further comprising a plurality of looped tabs on the exterior surface of the bag.

"14. The bag as recited in claim 10, wherein the porthole has a diameter of between 3 and 20 mm."

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