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EP0411170A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Water jet cutter and aspirator for brain surgery

Assignee: Marui Ika Co Ltd
•
Filing: 1989-07-31
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Granted: —
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Expires: 2009-07-31
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Abstract

Abstract An water jet cutter ("aqua-stream") and aspirator for crushing and removing brain tumors in cerebral surgery comprises a pressure chamber (2), a soft bottle (4) filled with a sterilized saline solution and mounted within the pressure chamber, an irrigation tube (6) connected at one end to an outlet (10) of the soft bottle, an ejection needle (14) removably connected to the other end of the irrigation tube via a switch (12) for controlling passage of the solution through the irrigation tube, and a suction tube (16) extending parallel to the ejection needle. The pressure chamber is adapted to be pressurized with a harmless gas (18) so as to compress the soft bottle to eject the solution in the soft bottle from the ejection needle. The ejection needle has a nozzle which is bent in such a manner that the solution ejected from the nozzle is directed toward a confronting inside wall (16a) of the tip of the suction tube.

Inventors

  • 👤 Haruhide Ito
  • 👤 Akihiro Kitamura

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-23 12:42
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3203; A61M; A61M3/00; A61M3/02; A61M3/0233; A61M3/0279; A61B2017/0046; A61B2017/00464; A61M5/00; A61M5/14; A61M5/142; A61M5/145; A61M5/148; A61M5/1483; A61M5/1486; A61M5/155

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 154 words
An aqua-stream and aspirator for crushing and removing brain tumors in cerebral surgery, comprising: a) a pressure chamber; b) a soft bottle filled with a sterilized saline solution and mounted within the pressure chamber; c) an irrigation tube connected at one end to an outlet of the soft bottle; d) an ejection needle removably connected to the other end of the irrigation tube via a switch for controlling passage of the solution through the irrigation tube; and e) a suction tube extending parallel to the ejection needle; f) the pressure chamber being adapted to be pressurized with a harmless gas so as to compress the soft bottle to eject the solution in the soft bottle from the ejection needle; g) the ejection needle having a nozzle which is bent in such a manner that the solution ejected from the nozzle is directed toward a confronting inside wall of a tip of the suction tube.
Claim 2
Dependent Claim 154 words
An aqua-stream and aspirator for crushing and removing brain tumors in cerebral surgery, comprising: a) a pressure chamber; b) a soft bottle filled with a sterilized saline solution and mounted within the pressure chamber; c) an irrigation tube connected at one end to an outlet of the soft bottle; d) an ejection needle removably connected to the other end of the irrigation tube via a switch for controlling passage of the solution through the irrigation tube; and e) a suction tube extending parallel to the ejection needle; f) the pressure chamber being adapted to be pressurized with a harmless gas so as to compress the soft bottle to eject the solution in the soft bottle from the ejection needle; g) the ejection needle having a nozzle which is bent in such a manner that the solution ejected from the nozzle is directed toward a confronting inside wall of a tip of the suction tube.
Claim 3
Dependent Claim 47 words
An aqua-stream and aspirator according to claim 1, wherein the tip of the suction tube has diametrically opposed first and second portions, the second portion being disposed adjacent to the nozzle, the first portion projection beyond the second portion for receiving the solution ejected from the nozzle.
Claim 4
Dependent Claim 36 words
An aqua-stream and aspirator according to claim 1, wherein the confronting inside wall of the suction tube has at the first portion a ridge having an outwardly facing taper surface and an inwardly facing taper surface.
Claim 5
Dependent Claim 21 words
An aqua-stream and aspirator according to claim 1, wherein the confronting inside wall of the suction tube has a cylindrical surface.
Claim 6
Dependent Claim 22 words
An aqua-stream and aspirator according to claim 1, wherein the nozzle of the ejection needle is bent at an angle of 15°.

References Cited (Backward Citations)

US4024866A Cited
US4603694A Cited
DE3421390A1 Cited
DD234608A1 Cited

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