Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1991-09-19
1994-06-21
Green, Randall L.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604 83, 604173, 604258, 604280, 239423, A61M 500
Patent
active
053225104
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention is directed to an injection apparatus for injecting at least two components to be brought into reaction with one another, the apparatus including a hollow injection needle that can be coupled to a plurality of syringe coupling connections corresponding in number to the number of components. The apparatus is preferably used for endoscopic purposes and is displaceable in a catheter with a grip member, whereby the syringe coupling connections are provided on the catheter in this case.
2. Description of the Related Art
Such injection apparatus are particularly employed for injecting two-component fibrin adhesives, whereby fibrin or fibrinogen is to be brought into reaction with thrombin at such locations within the human body whereat bleeding must be stopped by closing blood vessels.
Such fibrin adhesive injection apparatus are commercially known and can be divided into two types. In the one type, the hollow injection needle is connected to a hose that discharges into the handle sections of a chamber into which the channels of the two syringe coupling connections in turn discharge. By actuating the two syringes, the two components of the fibrin adhesive are simultaneously introduced into the chamber and from the latter into the hose in which they should mix before they reach the hollow injection needle. On the one hand, a thorough blending of the two components is thereby not guaranteed; on the other hand, there is also the risk that the mixture of components will harden before reaching the hollow injection needle and thereby block the hose. In the other type of apparatus, two hollow injection needles are therefore employed that are bonded to one another side-by-side and are each respectively connected to the syringe coupling connections via a hose, whereby the two hoses proceed side-by-side in the catheter. A relatively large thickness of the composite needles in the directions of their diagonals which continue one another thereby derives, whereby the individual hollow needles have their side containing their tip arranged against one another, so that the aperture angle of the hollow needle arrangement is relatively large, this leading to an undesirably pronounced damage to the tissue. Moreover, a good blending of the two adhesive components is not guaranteed because the components emerge laterally side-by-side from the injection needles into the tissue to be treated and the axes of their discharge flows are at a relatively great distance from one another.
SUMMARY OF THE INVENTION
It is therefore the object of the invention to provide an injection apparatus of the type initially cited, whereby the puncture resistance of the hollow injection needle is kept low and a good blending of the components without risk of premature hardening is achieved.
In an injection apparatus of this type, this object is achieved by the components being supplied to the injection needle through a corresponding plurality of hoses preferably proceeding through the catheter and each respectively connected to one of the syringe coupling connections in the gripping member, the components discharging in a common plane in which the reaction of the components is initiated. Advantageous developments of the invention provided by the hollow injection needle being connected to a first hose wherein a second hose having a smaller outside diameter than the inside diameter of the first hose proceeds coaxially therein up to the grip member, the second hose discharging at a slight distance preceding the proximal end of the hollow injection needle. The injection apparatus may further be characterized in that the injection needle is fixed to a sleeve secured in the first hose, the second hose ending in the sleeve.
It is also contemplated that the injection apparatus include a plurality of injection channels corresponding in number to the number of components, the injection channels being formed in the hollow injection needle and discharging in the end plane of the injection needle.
REFERENCES:
patent: 3223083 (1965-12-01), Cobey
patent: 3828980 (1974-08-01), Creighton et al.
patent: 4040420 (1977-08-01), Speer
patent: 4359049 (1982-11-01), Redl et al.
patent: 4631055 (1986-12-01), Redl et al.
patent: 4874368 (1989-10-01), Miller et al.
patent: 4978336 (1990-12-01), Capozzi et al.
patent: 5116315 (1992-05-01), Capozzi et al.
Lindner Andreas
Wechler Ingolf M.
Green Randall L.
Jones Mary Beth
Lindner Andreas
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