Surgery – Instruments – Forceps
Reexamination Certificate
2002-01-23
2004-06-22
Truong, Kevin T. (Department: 3731)
Surgery
Instruments
Forceps
C606S114000
Reexamination Certificate
active
06752822
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to devices and methods for retrieving mammalian tissue from a body cavity during a laparoscopic procedure.
2. Prior Art
Tissue recovery during a surgical procedure is an important task. This is so because tissue which has been excised should quickly be removed to prevent contamination of the body site by that tissue. Tissue retrieval during a laparoscopic procedure is typically fairly difficult. A laparoscopic procedure is done by pressurizing the peritoneum with a gas such as carbon dioxide, so as to expand the peritoneal cavity, to permit surgical access to the internal body organs. Surgical tools, such as a light source, camera and a trocar, which is a mechanical sleeve that is placed through a slit in the abdominal wall, are inserted into the body cavity so as to provide a video image of the internal organs within the body. Once a portion of the body tissue has been excised, it needs to be removed from within the peritoneal cavity. This excised tissue may contain loose objects which may be spilled into the peritoneal cavity, such objects could be gallstones from the gallbladder, or spilled liquids such as bile from the gallbladder or pus from the inflamed appendix which may contaminate the site to cause medical problems later on for the patient. Access to the surgical site is done through small surgical openings which restrict movement of those surgical tools. Removal of that excised tissue is sometimes awkward or impossible as the tissue is often difficult to grasp, collect and extract due to this limited tool movement and limited tool capabilities.
The prior art contains attempts to capture such tissue in a bag or a sack, for example a “Lapsac” and an “Endobag”. Latex condoms have also been tried. Such devices are introduced into the surgical site through a trocar either by a surgical tool or by a specially designed introducer. However, once a prior art bag is in the closed surgical space, these devices present several different problems. One problem is that the bags are collapsible so that a considerable amount of manipulation is required by the limited quantity of tools so as to hold the mouth of the bag open and steady so that the loose tissue can be brought to the opening before it is stuffed within the bag. Two or more graspers may be required just to hold the bag open also requiring a third grasper to bring the sample tissue to the open end of the bag.
Once the opened prior art bag is held steady a further grasper must be used to grab the tissue, stuff it into the bag, release the tissue and withdraw the grasper, grab the tissue at a new location stuff that portion into the bag, release the tissue and repeat the operation until the tissue is loaded within the bag completely. This operation requires extensive tool manipulation and is very time consuming. As the bag is loaded from the open end, gas may be trapped inside the bag as the bag collapses around the soft, wet tissue. This captured gas may result in stiffening of the bag so that further loading of the bag becomes difficult or impossible. Although the bag's gas pressure is slight while it is in the pressurized body cavity, once the bag is brought out to atmospheric pressure the captured gas tries to escape from the bag. This may cause expulsion of the bag's contents, contaminating the sterile field and possibly splattering the surgical team with bodily fluids.
Further more specific arrangements of the prior art are shown for example in the following U.S patents such as U.S. Pat. No. 5,176,687 to Hasson et al with a disposable pouch utilizing a rather complicated mechanism to reach within the body cavity to retrieve a tissue therein. A further device is shown in U.S. Pat. No. 5,190,561 to Graber showing a cone shaped bag with an open end thereon. U.S. Pat. No. 5,643,282 to Kieturakis shows an expandable wire cage which surrounds the tissue being sought. U.S. Pat. No. 5,779,716 to Cano et al shows a loose bag on the end of a wire rim for capturing a tissue sample. U.S. Pat. No. 5,853,374 to Hart et al shows an enclosure on the distal end of a shaft of a flat thereon to scoop and contain a tissue therewithin. This prior art shows a rather complicated and somewhat ineffective means for retrieving a body tissue from a body cavity. These devices fail to readily enclose the tissue and prevent it from being captured in a fully enclosed, safe, efficient and convenient manner.
It is the object of the present invention to overcome the disadvantages of the prior art.
It is a further object of the present invention to provide a tissue retrieval arrangement which will envelop the tissue and enclose it as it is being withdrawn from the body cavity.
It is a further object of the present invention, to provide a tissue retrieval arrangement which will minimize or eliminate the leakage of tissue from the retrieval device.
BRIEF SUMMARY OF THE INVENTION
The present invention relates to an organ or tissue retrieval bag arrangement utilizable in a laparoscopic surgical procedure. The organ retrieval bag in its preferred embodiment, comprises a generally cylindrically shaped, flexible, thin walled member having a first or proximal end and a second or distal end. The material of the retrieval bag may be made for example, from a latex or a plastic material. The first end is preferably open, and the second end or distal end is preferably closed in this first embodiment.
The distal end of the bag may be tapered to a narrower diameter than the diameter of the proximal end of the bag to facilitate eversion of that bag about a tissue sample, as will be explained hereinbelow.
The distal end has a pair of generally tapered tubular-shaped grasper receiving tips extending thereon. The grasper receiving tips are preferably unitary with the wall portions of the retrieval bag. The grasper receiving tips are spaced apart from one another each preferably having a flattened opposed wall facing its adjacent receiving tip. The grasper receiving tips are spaced apart so as to permit a portion of a tissue being retrieved to be received and engaged therebetween. The first or proximal end of the retrieval bag may have an annular band therearound to permit grasping of that end of the retrieval bag and to provide a strengthened end thereat.
A plurality of generally axially arranged ribs, pleats or folds may be molded into the sidewall of the retrieval bag in a spaced apart manner to provide additional volume or expansion for larger tissue sample retrieval
A grasper such as an Endopath(tm) grasper for example, is inserted inside the elongated organ retrieval bag. The grasper device has a handle on a proximal end thereof and a pair of grasper jaws on its distalmost end thereof. Movement of the handle effects opening and closing of the elongated grasper jaws in a manner known in the art.
Before a surgical procedure utilizing the present invention, the elongated grasper device is inserted within the organ retrieval bag, so that the grasper jaws are disposed and mate within the respective grasper receiving tips of the organ retrieval bag. The organ retrieval bag is then inserted through a pre-placed trocar which has been inserted through a surgical incision within the patient (i.e. abdomen). Once an organ or tissue has been properly excised by other surgical instruments, and the surgeon has located the tissue with a video image of the internal organs, the distalmost end of the organ retrieval bag with its opposed grasper receiving tips may be directed toward that tissue to be retrieved. The tissue is then at least partially seized between the grasper receiving tips as the handle of the grasper device is actuated so as to effect the pinching together of the opposed grasper jaws. A second grasper device should be manipulated within the peritoneum of the patient and grab the beading at the proximal end of the organ retrieval bag and pull it distally, so as to evert the organ retrieval bag and pull it off of the grasper device beginning at the proximal end thereof and thence ove
Halgren Don
Truong Kevin T.
LandOfFree
Body tissue retrievel bag arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Body tissue retrievel bag arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Body tissue retrievel bag arrangement will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3327935