WO2000042899A2 - Guide electro-thermal head for controllable sonde - Google Patents
Guide electro-thermal head for controllable sonde Download PDFInfo
- Publication number
- WO2000042899A2 WO2000042899A2 PCT/BG2000/000004 BG0000004W WO0042899A2 WO 2000042899 A2 WO2000042899 A2 WO 2000042899A2 BG 0000004 W BG0000004 W BG 0000004W WO 0042899 A2 WO0042899 A2 WO 0042899A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pipe
- metal
- sonde
- guide pipe
- guide
- Prior art date
Links
Classifications
-
- 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
- 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
- A61B1/0058—Flexible endoscopes using shape-memory elements
-
- 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
- A61M25/06—Body-piercing guide needles or the like
- A61M25/0662—Guide tubes
Definitions
- the invention is guide electro-thermal head for controllable sonde with which through thermoelastic transformation of the material of the very sonde a penetration takes its course by definite space track to objects situated in complicated dimensional configurations and is applicable in the filed of microsurgery, research in medicine and techniques as well as for quick access to elements in complicated devices for checking, adjustment and repair.
- the first pipe which is a central one, represents an operating channel for visualisation and operational interference.
- the second pipe above the first one has controllable adapter from hard into plastic condition.
- the initial end of this second pipe is fixed to a flange and is turned to itself outside so that it can cover the initial end of the third guide pipe whose front ending directs the torsion and whose other end is connected with the case of a hydraulic cylinder via the piston.
- the first and the second pipe pass along the axial line of this cylinder.
- the second pipe is sealed with a plastic ring with the piston so that the pressure of the piston over the lubricative fluid in the cylinder transfer it as greasing layer between the second and the third pipe to the front of the channel where the rotation of the controllable pipe happens.
- the first pipe is flexible, but sustainable to outside pressure.
- the controllable pipe is extruded by a polymer with a programmable temperature adapter from hard into plastic condition with inserted in the wall longitudinal belts which are isolated from each other and made of metal strings and from each knot of this graticule there is an output on the outside wall of the pipe for electrical contact and each belt is connected via a relevant segment to a flange-collector situated at the back end of the pipe with a pole of controllable source of voltage.
- the third guide pipe is flexible, but tension and stretching resistant. It has a metal ring at its front end.
- This solution allows plastification by belts along all the length of the controllable pipe from the flange-collector to the front of turning on the account of heating due to the current which runs through the metal strings of two adjacent to each other belts and the metal ring of the guide pipe.
- the purpose of the invention is to create a device which will keep the advantages of the concentrically turning to itself channel localising the heating by segments at the very top. It regulates the speed of torsion of the material adjacent to these segments and relevantly its directing.
- the guiding electro-thermal head for controllable sonde consists of metal ring with isolated inside wall and welded opposite to each other chips of Zener diodes along the outside wall and on the other side of each chip there is a welded metal segment from a cylinder with internal radius equal to the outside radius of the metal ring plus the thickness of the chip so that the in advance perforated and set front of the guide pipe to be lined from inside and outside by the metal ring and the metal segments having in mind that the metal segments are electrically isolated from each other and they are glued so the segments get in contact only via their outside surface with the metal strings stuck along the pipe which turns and at its beginning the guide pipe has a section of longitudinal elasticity.
- Fig. 1 shows the connections of the guide electro-thermal head with the controllable sonde
- Fig. 2 shows the scheme of the structure of the guide electro-thermal head for controllable sonde with which the direction of penetration is determined via a segment thermoelastic transformation of the material at the very top.
- Fig. 3 shows an example of performance of the guide pipe with a longitudinal elastic section and connected with it guide electro-thermal head.
- Fig. 4 shows the scheme of connecting of the segments to the control net.
- the guide electro-thermal head for controllable sonde 4 shown on Fig.l and Fig.2 consists of metal ring 5 with isolated inside wall and welded opposite to each other chips 6,7,8 and 9 of Zener diodes by its outside wall as on the other side of each chip there is a welded metal segment 10, 11, 12 and 13 from a cylinder of inside radius equal to the outside radius of the metal ring 5 plus the thickness of the chip so that the in advanced perforated and set front of the guide pipe 3 be lined inside and outside from the metal ring 5 and the metal segments 10, 11, 12 and 13.
- the metal elements are electrically isolated from each other and are glued and only through the outside surface the segments get into contact with the metal strings 16, 17, 18 and 19 stuck along the surface of the pipe 2 which gets elastified and turns over and at the front the guide pipe 3 has a section of longitudinal elasticity from the inserted spiral spring 15 and the material around it.
- the guide electro-thermal head for controllable sonde 4 shown on Fig.l and Fig.2 is connected so that the segments 10, 11, 12 and 13 are in continuous contact with the relevant metal strings 16, 17, 18 and 19 stuck longitudinally along the controllable pipe 2 around the guide pipe 3.
- this voltage is distributed upon the junctios of the two opposite connected Zener diodes 7 and 9 as it is seen on Fig.2 and as drop over the resistance of the metal string of the running current I.
- the thermal effect from the junction of the diode which is directly proportional the voltage of the junction and the current through it, mainly the segment of the reverse connected diode is heated.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU22715/00A AU2271500A (en) | 1999-01-25 | 2000-01-25 | Guide electro-thermal head for controllable sonde |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BG103110 | 1999-01-25 | ||
BG103110A BG103110A (en) | 1999-01-25 | 1999-01-25 | Guiding electrothermal head for a controllable drill |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2000042899A2 true WO2000042899A2 (en) | 2000-07-27 |
WO2000042899A3 WO2000042899A3 (en) | 2000-11-16 |
Family
ID=3927662
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/BG2000/000004 WO2000042899A2 (en) | 1999-01-25 | 2000-01-25 | Guide electro-thermal head for controllable sonde |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2271500A (en) |
BG (1) | BG103110A (en) |
WO (1) | WO2000042899A2 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4753223A (en) * | 1986-11-07 | 1988-06-28 | Bremer Paul W | System for controlling shape and direction of a catheter, cannula, electrode, endoscope or similar article |
DE4435644A1 (en) * | 1993-10-05 | 1995-04-06 | Asahi Optical Co Ltd | Bending section for an endoscope |
WO1999060917A2 (en) * | 1998-05-28 | 1999-12-02 | Stefanow Alexander R | Cannula with a built-in net for direction and a control system |
-
1999
- 1999-01-25 BG BG103110A patent/BG103110A/en unknown
-
2000
- 2000-01-25 AU AU22715/00A patent/AU2271500A/en not_active Abandoned
- 2000-01-25 WO PCT/BG2000/000004 patent/WO2000042899A2/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4753223A (en) * | 1986-11-07 | 1988-06-28 | Bremer Paul W | System for controlling shape and direction of a catheter, cannula, electrode, endoscope or similar article |
DE4435644A1 (en) * | 1993-10-05 | 1995-04-06 | Asahi Optical Co Ltd | Bending section for an endoscope |
WO1999060917A2 (en) * | 1998-05-28 | 1999-12-02 | Stefanow Alexander R | Cannula with a built-in net for direction and a control system |
Also Published As
Publication number | Publication date |
---|---|
BG103110A (en) | 2000-07-31 |
AU2271500A (en) | 2000-08-07 |
WO2000042899A3 (en) | 2000-11-16 |
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