Surgery – Means for introducing or removing material from body for... – Treating material applied to or removed from external...
Patent
1996-01-25
1999-09-14
Stright, Jr., Ronald K.
Surgery
Means for introducing or removing material from body for...
Treating material applied to or removed from external...
604 24, 604 70, 604 82, 606213, 606214, A61M 3500
Patent
active
059515317
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
After tissue has been wounded or cut, the opening must be surgically closed to stop bleeding and enable healing of the tissue. In cases of severe wound and skin grafting, an insufficient amount of tissue can exist around the sides of the wound or surgical incision to allow the sides to be pulled together. Similarly, when diseased or blemished tissue is removed by surgery, insufficient tissue may be left around the perimeter of the removed tissue. These procedures are invasive and have substantial risks of complications, including that of infection.
One attempt to stem blood logs and to facilitate wound closure is application of a hemostatic agent, such as collagen, to the wound to form a wound dressing. The hemostatic agent, on contact with blood or other body fluids, adheres to the tissue and stems bleeding,
However, hemostatic agents are extremely hydrophilic. Upon contact with moisture from the wound or the atmosphere, the fibrillar hemostats have a tendency to clump and adhere tenaciously to any object. These objects include instruments, gloves, non-bleeding tissues and other surfaces in addition to the intended open wound or surgical incision. This clumping and adhesion takes application of the hemostatic agent to the wound difficult. Conventional apparatus intended to suspend particulates in a gas, such as are taught in U.S. Pat. No. 4,204,645, issued on May 27, 1986 to Hepp, and U.S. Statutory Invention Registration H257, are typically not suitable for application of hemostatic agents because the agents tend to agglomerate and consequently plug the apparatus.
SUMMARY OF THE INVENTION
The present invention relates to an apparatus and method for applying a particulate hemostatic agent to living tissue.
The apparatus includes a particulate hemostatic agent source, a continuous gas source and means for combining a turbulent continuous gas stream from the gas source with the particulate hemostatic agent within the hemostat agent source to form a finely dispersed fluid stream of the particulate hemostatic agent in the gas. The apparatus further includes an outlet conduit extending from means for combining the gas and particulate hemostatic agent through an outlet of the conduit, whereby the fluid stream is conducted through the outlet conduit and is discharged from the outlet conduit onto proximate living tissue, thereby applying the particulate hemostatic agent to the living tissue.
The method includes the steps of combining a turbulent continuous gas stream with the particulate hemostatic agent to form a finely dispersed fluid stream of the particulate hemostatic agent in the gas. The fluid stream is directed through an outlet conduit, whereby the fluid stream is conducted through the outlet conduit and onto proximate living tissue, thereby applying the particulate hemostatic agent to the living tissue.
This invention has many advantages which include an apparatus that allows accurate placement by a surgeon of the particulate hemostatic agent onto a bleeding site. The apparatus is easy to hold and to use, and it allows the surgeon to view the placement of the particulate hemostatic agent on the tissue. By forming a finely dispersed fluid stream of the hemostatic agent in a turbulent continuous gas stream, the apparatus minimizes the problem of sticking or clumping before reaching the targeted wound or surgical incision and allows for control of the amount of particulate hemostatic agent applied.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an orthogonal projection side view of one embodiment of the apparatus of the present invention.
FIG. 2 is an orthogonal projection end view of the embodiment shown in FIG. 1.
FIG. 3 is a second embodiment of the apparatus of the present invention.
FIG. 4 is an orthogonal projection side view of a third embodiment of the apparatus of the present invention.
FIG. 5 is an orthogonal projection end view of the third embodiment shown in FIG. 3 taken along line III--III.
DETAILED DESCRIPTION OF THE INVENTION
The features and other details
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Sinyakevich, V. I., et al.., "Press Working Surfaces Lubrication Plant--Has Compressed Air Operated Control Valve Measuring and Injecting Controlled Amounts of Lubricant" (From Derwent Publication, Ltd., London, GB, Week 8340, Abstract of Soviet Union, Inventor's Certification No. 978999, dated Dec. 7, 1982).
Ferdman Ariel G.
Pinsky Vladimir J.
MedChem Products, Inc.
Stright Jr. Ronald K.
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