WO1999051154A2 - A cannula of changeable length and shape - Google Patents
A cannula of changeable length and shape Download PDFInfo
- Publication number
- WO1999051154A2 WO1999051154A2 PCT/BG1999/000008 BG9900008W WO9951154A2 WO 1999051154 A2 WO1999051154 A2 WO 1999051154A2 BG 9900008 W BG9900008 W BG 9900008W WO 9951154 A2 WO9951154 A2 WO 9951154A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bands
- cannula
- movement
- respect
- strokes
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00147—Holding or positioning arrangements
- A61B1/00154—Holding or positioning arrangements using guiding arrangements for insertion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/005—Flexible endoscopes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0116—Steering means as part of the catheter or advancing means; Markers for positioning self-propelled, e.g. autonomous robots
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
- A61B17/3439—Cannulas with means for changing the inner diameter of the cannula, e.g. expandable
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
- A61B2017/3443—Cannulas with means for adjusting the length of a cannula
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0119—Eversible catheters
Definitions
- the invention refers to a cannula of changeable length and shape, which can be used in medical application during the penetration of various devices, e.g. endoscopes, into the living systems as well as other activities, which necessitate the penetration into a medium, vulnerable to mechanical intervention and/or is without well-shaped confining walls.
- various devices e.g. endoscopes
- tubes, tubular elements (1-7) and devices e.g. endoscopes, including tubes and tubular elements (8, 9), which are characterised by the fact that after penetrating into the body along the existing lumens - oesophagus, blood vessels, etc. - they ensure some protection from mechanical traumas to the surrounding tissues during the operation of the devices.
- a disadvantage of the existing tubes, tubular elements and devices containing tubes and tubular elements is the fact that during their penetration into the living system as well as during their removal, they cause considerable traumas due to the friction between their outside surface and the medium of penetration and particularly to the side pressure exerted by the sections where there are curves.
- the patent /13/ proposes a new principle of action of a three-dimensional controllable cannula according to which the leading instrument is placed in a lumen of the cannula itself.
- the lumen is formed during the penetration into the body without having to use ready natural ways and operates on the principle of snail horns - protruding and retracting
- the patents does not propose a construction working on this principle, neither the moving force which will open and close the cannula.
- the aim of the invention is to create a cannula of changeable length and shape, which is to penetrate the living system not only through the existing orifices, and which is to reduce to a minimum the traumas to the surrounding medium e.g. the human body.
- the task is solved by a device in which the cannula is formed at entering the working medium only by lengthening the front end, which takes the turns in any direction only through growing in the same direction and which is taken out of the surrounding medium only by shortening of the front ends, keeping static all the time and keeping stable its shape.
- the task of the invention is to create a cannula, which is to penetrate into the surrounding medium and to be taken out of it along a predetermined trajectory, keeping its shape in the sections, in which It has penetrated.
- a cannula 1 has been created, built up of parallel to its axis bands 2, which are linked laterally with each other with links, which allow their sliding in respect to each other.
- the bands 2 At the end of the cannula 1, with which it penetrates into the surrounding medium, the bands 2 have ledges, covered by caps 4, and these ledges allow each of them to slide past its neighbours only to a definite limited distance.
- the penetration or the removal of the cannula 1 is effected by abrupt strokes upon one separate band 2 in the direction of the movement of cannula 1 as a whole, whereat this band 2 slides to a certain distance in respect to the bands it touches and by consecutive as abrupt strokes upon each of the remaining bands, each of them slides irrespective of the others in respect to its neighbours, until all the bands 2 move in the desired direction, and the cannula 1 as a whole is moved too.
- the remaining bands keep their position between each other and in this way the cannula 1 keeps the shape, obtained before in each section. That is why after moving the cannula 1 in one or another direction, it keeps its shape in each of the sections of the space it has penetrated.
- the direction of the penetration of the cannula 1 in the new sections of spaces hence the shape of the cannula 1 in the new section can be changed when from the exterior side of the turn the bands 2 move at a higher degree than the bands 2 from the internal side of the turn, and the stage of movement of the intermediate bands smoothly changes between two extreme vales. Since the ends of the bands 2 are covered by their common cap 4, which has a fixed diameter, the unequal movement of the bands results in forming a turn with an exterior side from the side of the bands, which are moved at a higher degree.
- the advantages of the cannula 1 consist of: During the penetration and the removal of the cannula 1, its friction with the surrounding medium is minimum, as at each separate moment only one of its numerous narrow bands 2 moves only a short distance. After that this band remains static until all the remaining bands 2 move. This makes possible the relaxation of even minimal tensions created in any point of the surrounding medium, which is in contact with this band.
- the wall of the cannula is free from any additional parts, devices and instruments, therefore the diameter of the lumen of this cannula is maximal.
- Example 1 A cannula for movement along determined trajectory shown in fig. 1, whose wall is built up of bands 2, which are located parallelly to its axis and are linked laterally with each other by meshing a male and a female part, located respectively on each side of the band.
- bands 2 At the end of the bands, from the end of the cannula by which it penetrates into the surrounding medium, from the external wall of the cannula, the bands have limiting ledges 3, covered by a cap 4.
- the penetration into or the removal from the surrounding medium is effected by abrupt strokes in the direction of the cannula movement as a whole upon one of all bands of this cannula, whereat this band slides a short distance in respect to its neighbouring bands, the distance being determined by the limiting ledges at the end of each band covered by the cap.
- Analogous, consecutive in time strokes follow upon each of the remaining bands, whereby the movement of the cannula as a whole is achieved. The repeated repetition of this cycle results in the penetration of the cannula as a whole at the desired distance in the surrounding medium.
- the remaining bands ensure the mechanical memory of the cannula and it keeps its shape without alterations in the sections, it has already penetrated, although it still continues to penetrate or is being removed from the surrounding medium.
- the sequence of alternating the movement of the separate bands is arbitrary within each cycle, but in order to achieve maximum relaxation of the tensions- a result of the friction with the surrounding medium and between the bands, it is better to alternate bands opposite to the cannula diameter.
- the end of the cannula moves along a straight line when all bands move the same distance within each consecutive cycle, and it turns in the desired direction, forming a turn, when from the external side of the turn the movement of the bands is greater than the movement from the internal side of the turn and the necessary deformation of the bands is ensured by the cap in the same end.
- Patent PF RU 2022518 Cl 13.02.91
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU31331/99A AU3133199A (en) | 1998-04-02 | 1999-04-01 | A cannula of changeable length and shape |
AU31330/99A AU3133099A (en) | 1998-04-02 | 1999-04-01 | A cannula of changeable length and shape |
JP54983599A JP2002500547A (en) | 1998-04-02 | 1999-04-01 | Cannula with variable length and shape |
EP99913030A EP1032317A2 (en) | 1998-04-02 | 1999-04-01 | A cannula of changeable length and shape |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BG102366A BG102366A (en) | 1998-04-02 | 1998-04-02 | Canal with alternating length and form |
BG102368 | 1998-04-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1999051154A2 true WO1999051154A2 (en) | 1999-10-14 |
WO1999051154A3 WO1999051154A3 (en) | 1999-11-18 |
Family
ID=3927410
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/BG1999/000006 WO1999051152A2 (en) | 1998-04-02 | 1999-04-01 | A cannula of changeable length and shape |
PCT/BG1999/000008 WO1999051154A2 (en) | 1998-04-02 | 1999-04-01 | A cannula of changeable length and shape |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/BG1999/000006 WO1999051152A2 (en) | 1998-04-02 | 1999-04-01 | A cannula of changeable length and shape |
Country Status (4)
Country | Link |
---|---|
EP (2) | EP1006901A2 (en) |
AU (2) | AU3133099A (en) |
BG (1) | BG102366A (en) |
WO (2) | WO1999051152A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010011348A1 (en) * | 2008-07-23 | 2010-01-28 | Alphatec Spine, Inc. | Curvilinear spinal access method and device |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1477371A1 (en) | 1987-04-07 | 1989-05-07 | Киевский Филиал Ленинградского Специального Конструкторского Бюро По Проектированию Кожгалантерейных, Обувных, Меховых Машин И Средств Автоматизации | Machine for securing footwear sole parts along contour ,particularly, of ledge |
SU1480806A1 (en) | 1987-07-06 | 1989-05-23 | Научно-Исследовательский Институт Лазерной Хирургии | Flexible controllable tube |
US5448989A (en) | 1993-02-22 | 1995-09-12 | Richard Wolf Gmbh | Medical instrument shaft capable of positive and non-positive linking of segments |
US5558665A (en) | 1994-06-24 | 1996-09-24 | Archimedes Surgical, Inc. | Surgical instrument and method for intraluminal retraction of an anatomic structure |
US5620408A (en) | 1995-04-14 | 1997-04-15 | Vennes; Jack A. | Endoscopic over-tube |
US5643174A (en) | 1993-08-18 | 1997-07-01 | Sumitomo Bakelite Company Limited | Endoscopic guide tube with embedded coil spring |
US5645520A (en) | 1994-10-12 | 1997-07-08 | Computer Motion, Inc. | Shape memory alloy actuated rod for endoscopic instruments |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3799152A (en) * | 1972-08-21 | 1974-03-26 | S Kim | Flexible and expandable esophagoscope |
DE3329176C1 (en) * | 1983-08-12 | 1984-11-22 | Sterimed Gesellschaft für medizinischen Bedarf mbH, 6600 Saarbrücken | Medical device with an insertion aid |
DE3943872B4 (en) * | 1989-08-01 | 2005-08-25 | Stm Medizintechnik Starnberg Gmbh | Device for introducing a medical endoscope into a body canal |
US5312417A (en) * | 1992-07-29 | 1994-05-17 | Wilk Peter J | Laparoscopic cannula assembly and associated method |
US5658309A (en) * | 1995-05-01 | 1997-08-19 | C. R. Bard, Inc. | Guidewire/inflation tube locking apparatus and method of use |
DE19729499A1 (en) * | 1997-07-10 | 1999-01-14 | Friedrich Schiller Uni Jena Bu | Guide for flexible endoscope, with reinforcements |
-
1998
- 1998-04-02 BG BG102366A patent/BG102366A/en unknown
-
1999
- 1999-04-01 EP EP99913029A patent/EP1006901A2/en not_active Withdrawn
- 1999-04-01 AU AU31330/99A patent/AU3133099A/en not_active Abandoned
- 1999-04-01 EP EP99913030A patent/EP1032317A2/en not_active Withdrawn
- 1999-04-01 WO PCT/BG1999/000006 patent/WO1999051152A2/en not_active Application Discontinuation
- 1999-04-01 AU AU31331/99A patent/AU3133199A/en not_active Abandoned
- 1999-04-01 WO PCT/BG1999/000008 patent/WO1999051154A2/en not_active Application Discontinuation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1477371A1 (en) | 1987-04-07 | 1989-05-07 | Киевский Филиал Ленинградского Специального Конструкторского Бюро По Проектированию Кожгалантерейных, Обувных, Меховых Машин И Средств Автоматизации | Machine for securing footwear sole parts along contour ,particularly, of ledge |
SU1480806A1 (en) | 1987-07-06 | 1989-05-23 | Научно-Исследовательский Институт Лазерной Хирургии | Flexible controllable tube |
US5448989A (en) | 1993-02-22 | 1995-09-12 | Richard Wolf Gmbh | Medical instrument shaft capable of positive and non-positive linking of segments |
US5643174A (en) | 1993-08-18 | 1997-07-01 | Sumitomo Bakelite Company Limited | Endoscopic guide tube with embedded coil spring |
US5558665A (en) | 1994-06-24 | 1996-09-24 | Archimedes Surgical, Inc. | Surgical instrument and method for intraluminal retraction of an anatomic structure |
US5645520A (en) | 1994-10-12 | 1997-07-08 | Computer Motion, Inc. | Shape memory alloy actuated rod for endoscopic instruments |
US5620408A (en) | 1995-04-14 | 1997-04-15 | Vennes; Jack A. | Endoscopic over-tube |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010011348A1 (en) * | 2008-07-23 | 2010-01-28 | Alphatec Spine, Inc. | Curvilinear spinal access method and device |
Also Published As
Publication number | Publication date |
---|---|
WO1999051152A3 (en) | 1999-11-18 |
AU3133099A (en) | 1999-10-25 |
WO1999051154A3 (en) | 1999-11-18 |
EP1006901A2 (en) | 2000-06-14 |
EP1032317A2 (en) | 2000-09-06 |
WO1999051152A8 (en) | 1999-12-29 |
WO1999051152A2 (en) | 1999-10-14 |
BG102366A (en) | 1999-10-29 |
AU3133199A (en) | 1999-10-25 |
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