Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1990-09-04
1992-03-24
Jaworski, Francis
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604174, A61M 532
Patent
active
050983970
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a device for interconnection of an outer catheter having a rigid end portion, and an inner catheter in a cutaneous passageway to be implanted in the body, for supply of drugs or the like. More particularly the invention relates to a cutaneous passageway for interconnection of an internal space inside the body and an external space outside the body, including a resilient, elastic seal enclosed in the passageway and forming a passage therethrough to receive an outer catheter therein, said passage reclosing by withdrawal of the outer catheter therefrom, and screw means for compressing said seal.
A passageway of this type is disclosed in FR-A-2135326.
SUMMARY OF THE INVENTION
In connection with FIG. 6 of the drawings in the international application PCT/SE87/00201 a cutaneous passageway is shown having a catheter for supply for example of a drug to the human body from an external container, ampoule or the like. The supply of a drug must take place under sterile conditions, and a suitable method is to exchange the outer catheter together with the drug container in the cutaneous passageway. This purpose is achieved according to the present invention by the cutaneous passageway having obtained the characterizing features of claim 1.
BRIEF DESCRIPTION OF THE DRAWING
In order to illustrate the invention this will be described in more detail below reference being made to the accompanying drawing in which
FIG. 1 shows the cutaneous passageway partly cut away, and the location thereof in the body before the outer catheter has been connected to the cutaneous passageway, and
FIG. 2 shows the cutaneous passageway of FIG. 1 but with the outer catheter connected thereto in order to allow communication with the inner catheter.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The outside shape of the cutaneous passageway 1 appears from the international application PCT/SE87/00201.
The novel feature of the present invention is the sealing device in the cutaneous passageway 1, which is shown in FIGS. 1 and 2, in order to supply in a sterile and leakproof manner via catheters 2 and 3 for example a drug to a predetermined locality in the body through the cutaneous passageway 1.
The outer catheter 2 has at the connection end thereof a tube 4 of a rigid material, which is intended to penetrate the seal 5 provided in the cutaneous passageway 1, said seal comprising an elastomer, for example silicone, which recloses and seals when the outher catheter 2 is being exchanged or when the outer catheter 2 has been removed. The seal 5 is kept in place in the cutaneous passageway 1 by a threaded screw cap 6 which is screwed into the outer cylinder 8 which is attached to the base plate 12 of the cutaneous passageway 1 and by means of which the sealing properties in relation to the friction against the connection end 4 of the outer catheter 2 can be controlled. This control is obtained by rotating the screw cap 6 by means of a special tool fitting into recesses 7 in the screw cap 6. The friction against the connection end 4 at the penetration of the seal 5 should be as low as possible so as to prevent the zone 9 for tissue penetration of the cutaneous passageway 1 from coming loose from the body. For the same reason the diameter of the rigid end 4 of the outer catheter 2 should not exceed 3 mm. The seal 5 must also seal against the attachment plate 10 of the inner catheter 3 so as to prevent leakage or passage of bacteria into the passage system 11 of the catheters 2 and 3.
The seal 5 biases the attachment plate 10 against the base of the outer cylinder 8. The seal 5 can be made with a central aperture which is closed by tight fit at the mounting in the cutaneous passageway 1 and forms a guide only for the connection end 4 at the interconnection in the cutaneous passageway 1.
1. A cutaneous device for interconnection of an internal space inside the body and an external space outside said body, comprising: opening at the base; for engaging with said threaded cylinder; there
REFERENCES:
patent: 200471 (1878-02-01), Northrup
patent: 3402710 (1968-09-01), Poleschuck
patent: 4025964 (1977-05-01), Owens
patent: 4491126 (1985-01-01), Cullor
patent: 4668222 (1987-05-01), Poirier
Axelsson Robert
Svensson Jan A.
Akers Scott R.
Jaworski Francis
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