[go: up one dir, main page]

WO2000062658A1 - Catheter reversible a reglage thermique de la rigidite - Google Patents

Catheter reversible a reglage thermique de la rigidite Download PDF

Info

Publication number
WO2000062658A1
WO2000062658A1 PCT/BG2000/000011 BG0000011W WO0062658A1 WO 2000062658 A1 WO2000062658 A1 WO 2000062658A1 BG 0000011 W BG0000011 W BG 0000011W WO 0062658 A1 WO0062658 A1 WO 0062658A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
guide
controllable
linked
hydraulic cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/BG2000/000011
Other languages
English (en)
Inventor
Alexander R. Stefanov
Ivan R. Stefanov
Ranguel N. Petkov
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AU39508/00A priority Critical patent/AU3950800A/en
Publication of WO2000062658A1 publication Critical patent/WO2000062658A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • A61M25/0119—Eversible catheters
    • 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
    • A61M25/0043—Catheters; Hollow probes characterised by structural features
    • A61M2025/0062—Catheters; Hollow probes characterised by structural features having features to improve the sliding of one part within another by using lubricants or surfaces with low friction
    • 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
    • A61M2025/0063—Catheters; Hollow probes characterised by structural features having means, e.g. stylets, mandrils, rods or wires to reinforce or adjust temporarily the stiffness, column strength or pushability of catheters which are already inserted into the human body
    • A61M2025/0064—Catheters; Hollow probes characterised by structural features having means, e.g. stylets, mandrils, rods or wires to reinforce or adjust temporarily the stiffness, column strength or pushability of catheters which are already inserted into the human body which become stiffer or softer when heated
    • 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
    • A61M25/005—Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids
    • 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
    • A61M25/0113—Mechanical advancing means, e.g. catheter dispensers

Definitions

  • the invention is controllable electro-thermal sonde with which through electro-thermal 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 minimi-invasive medicine, research and diagnostics in bodies with complicated internal configuration 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 high-elastic 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 can 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 takes its course.
  • 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 high 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; 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 opposite to each other belts and the metal ring of the guide pipe.
  • the guiding electro-thermal head for controllable sonde (3) 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.
  • 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 via a guide electro-thermal head whose electrical connections with the elements take course via metal strings inbuilt in the wall of the guide pipe and coupling outlet at the other end so that it can be technological as for production and reliable as for the operation.
  • the purpose of this invention is to create possibility the hydraulic pressure in the cylinder to be used and for automatic catching for moving of the controllable pipe.
  • the task is solved by creating a controllable pipe made of thermo-plastic material which consists of two coaxially located in each other pipes.
  • the first pipe has controllable adapter from hard into high elastic condition.
  • the initial end of this pipe is fixed to a flange and is turned to itself outside so that it can cover the initial end of the second guide pipe whose front ending directs the torsion via electro-thermal guide head.
  • It consists of segments of metal ring with insulated inside wall and welded to the outside wall of each segment relevantly cathode of chip of Zener-diode and collector-basis of chip of n-p-n transistor.
  • the segments are set at the front end, along the inside wall of the guide pipe with metal strings in it so that the chips can go in the openings of the wall, made in advance.
  • In the opening of transistor chip there is an outlet of metal string which connects with the emitter and in a third opening an outlet of a second metal string is connected relevantly to the segment. Insulating resin is put over these links. Insulating resin is put is the second opening as well but the anode over the chip of the Zener- diode remains open. This way we obtain the front of the pipe. This front is lined from outside with metal ring which links electrically the anodes of the Zener- diodes.
  • the metal strings after being linked, pass through spirally coiled to the axis pass through the wall of the guide pipe to its other end where they are outlet and mechanically linked by sticking together in a radial guide-distributor and electrically each end is linked to the relevant contact site over printed circuit- board situated concentrically to the guide pipe and fixed to the guide case of the hydraulic cylinder.
  • Each contact site is linked via band with a connector outlet.
  • Contact plates are linked radially to the opposite end of the printed-circuit board. The contact plates are pressed in the cylinder's case so that they can slide by the outside wall of the controllable pipe entering into contact with the metal strings glued spirally along the pipe.
  • the relevant lines of the segments and of the contact plates with conductors are linked via switchers to a digital programmable generator of voltage and current and to analogue-digital converter.
  • the lines of the transistor emitters are linked to the analogue-digital converter via analogue keys.
  • the generator, the analogue-digital converter and the digital control of the keys are linked to a computer.
  • a pick-up for temperature of segment instead of a transistor or diode chip, consisting of thermistor or thermocouple of welded two strings of appropriate metal. One of them is welded to the segment as well.
  • the hydraulic cylinder consists of guide case is made of plastic. It is linked with the piston via cylindrical corrugated diaphragm. There is a sealing and pushing valve concentrically pressed in the piston with diameter of the opening by the axis equal to the diameter of the controllable pipe.
  • the profile of the section of the valve is sized in such a way that it can slide along the controllable pipe's wall in absence of hydraulic pressure and it can catch it when operational pressure exists.
  • the liquid in the system is greasing. It contains micro-spheres and it gets closed with a sealing ring situated on the guide pipe and fixed to the flange which is glued at the front of the rotated pipe.
  • the guide case of the hydraulic cylinder is made of plastic so that a radial guide-distributor be obtained in front - for catching the end of the guide pipe and distribution of the metal strings outlet from it, closed in the case printed-circuit board with open radially around the guide-distributor contact sites which are connected with outlets of electrical connector and round cutting back to the cylinder in which to enter and glue the end of the corrugated cylindrical diaphragm.
  • Piston of the hydraulic cylinder is made of plastic. It consists of a disc with a profiled opening in the middle where a sealing and pushing valve is caught and a round cutting, on the front, where the other end of the corrugated cylindrical diaphragm be glued.
  • Fig. 1 shows the performance of a channel of pipe with an in-built net for control which turns to itself the same way as the snail's horn via plastification of current by the longitudinal metal strings and a contact ring set at the front of the pipe guiding the torsion.
  • Fig. 2 shows a section of the wall of the controllable pipe and its structure in section.
  • Fig. 3 shows the linking of the elements in the guide electro-thermal head for controllable sonde with metal strings situated in the guide pipe's wall.
  • Fig. 4 shows an example of performance of the guide pipe with a longitudinal elastic section and connected with it guide electro-thermal head.
  • Fig. 5 shows the controllable sonde with its main elements and interconnections.
  • Fig. 6 shows the scheme of connecting of the segments and their elements to the control system.
  • the guide electro-thermal head for controllable sonde which consists of two coaxially located into each other pipes.
  • the first pipe 2 has controllable adapter from hard into plastic condition. Its front is fixed to a flange 15 and is turned to itself in outside direction so that it can cover the front of the second guide pipe 3 whose front end directs the torsion of the guide electro-thermal head which consists of segments 5 of metal ring with insulated inside wall and welded to the outside wall of each segment cathode of chip of Zener-diode 7 and collector-base of chip of n-p-n transistor 8.
  • the segments are set at the front along the inside wall of the guide pipe with metal strings 9 and 10 in it so that the chips enter the openings made in the wall in advance.
  • Isolating resin is put in the second opening, too, but so that the anode over the chip of the Zener-diode 7 remain open.
  • the front of the pipe obtained in this way is lined from outside with a metal ring 4, which links electrically the anodes of the Zener-diodes as it is shown on Fig.4.
  • the already linked metal strings 9 and 10, two each for every segment, pass spirally coiled according to the axis, through the wall of the guide pipe 3 to its other end where they are outlet and linked mechanically by gluing together in a radial guide-distributor, formed in the body 20, Fig. 5.
  • each end is connected to the relevant contact site 17 over printed-circuit board_19, situated concentrically to the guide pipe 3 and fixed to the guide body 20 of the hydraulic cylinder. Every contact site 17 is linked with a band to outlet 16 of a connector. There are radial contact plates 18 connected to the opposite side of the board 19. These plates are pressed in the cylinder's body so that they slide along the outside wall of the guide pipe 2 by the metal strings 13 (Fig.2).
  • the guide body 20 of the hydraulic cylinder (Fig. 5) is linked to the piston 24 via cylindrical corrugated diaphragm 22.
  • the profile of the section of the valve is sized in such a way that it can slide by the wall of the pipe in absence of hydraulic pressure and catch it when operating pressure exists.
  • Through pipe 21 and opening in the guide body of the hydraulic cylinder the profile of the section is connected to computer with hydraulic pump and with digital pick-up for pressure.
  • the liquid in the system is lubricating and it includes micro-spheres and is closed with a sealing ring 14 located on the guide pipe 3 and fixed to the flange 15, glued at the front of the turned guide pipe 2.
  • controllable sonde made of thermo-plastic material formed as pipe 2 which turns to outside under the mechanical impact after being brought into a high elastic condition when penetration and turning outside when pulled out consists in the fact that after creating certain pressure of the lubricating fluid in the hydraulic cylinder formed by the guide body 20 on Fig. 5, the piston 24 and the corrugated cylindrical diaphragm 22 through the pipe 21, this lubricant fluid is limited by the piston 24 with the sealing and pushing valve 23 and from the front flange 15 with seal ring 14, sequential local elastification takes its course by segments on the account of the heat effect from the junction of the Zener- diode which is directly proportional to the voltage of the junction and the current through it and as a consequence the segment of the opposite linked diode is mainly heated.
  • each segment for example 5, is measured with a diode chip 7 or chip of transistor 8 with together linked collector-base and on the account of the temperature dependence of the emitter's junction as the emitter is connected via analogue key 27 with analogue- digital converter 28 from programme of the linked to it computer 37.
  • the setting of the step of movement and the direction takes its course by a programme for control with commands set by the operator to the computer.
  • the controllable pipe 2 is brought to flexible condition in the section of the contact plates 18 to the ring 4 via warming up the metal strings 13 with a current impulse from the generator 26 through key 33, the connector 16, contact plates 18, metal strings 13, metal ring 4, the Zener-diodes in right direction 7, the segments 5, the lines 10 through the closed keys 29, 30, 31, 32 and the keys 34, 35 connected with the negative pole.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • Biophysics (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Physics & Mathematics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Pulmonology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Endoscopes (AREA)

Abstract

Selon cette invention, une sonde/cathéter en matière thermoplastique peut s'utiliser en chirurgie mini-invasive, pour la recherche et le diagnostic appliqués aux corps à configuration interne complexe. Une tête segmentée du type à anneaux (4, 5) d'un tube de guidage (3) est munie de dispositifs de chauffage (7) et de ramassage (8) reliés par des conducteurs enroulés en spirale dans la paroi du tube de guidage (3) à travers des connecteurs (17, 18) à un système de commande électronique (37). Un tube (2) en matière thermoplastique dont la partie avant est fixée à une collerette (15) est retourné de manière à recouvrir la tête (4, 5) du tube de guidage (3). Le réglage thermique de la rigidité permet le retournement du tube thermoplastique (2) dont l'avancement et le retrait sont contrôlés au moyen de systèmes à pression hydraulique (22, 24).
PCT/BG2000/000011 1999-04-16 2000-04-14 Catheter reversible a reglage thermique de la rigidite Ceased WO2000062658A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU39508/00A AU3950800A (en) 1999-04-16 2000-04-14 Everting catheter with thermally controlled stiffness

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BG103344A BG103344A (en) 1999-04-16 1999-04-16 Controllable probe of thermoelastic material
BG103344 1999-04-16

Publications (1)

Publication Number Publication Date
WO2000062658A1 true WO2000062658A1 (fr) 2000-10-26

Family

ID=3927741

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BG2000/000011 Ceased WO2000062658A1 (fr) 1999-04-16 2000-04-14 Catheter reversible a reglage thermique de la rigidite

Country Status (3)

Country Link
AU (1) AU3950800A (fr)
BG (1) BG103344A (fr)
WO (1) WO2000062658A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2406823A1 (de) * 1974-02-13 1975-08-14 Peter Udo Verfahren und vorrichtung zur katheterisierung von geraden oder gewundenen roehren- und gefaessystemen
JPS63305836A (ja) * 1987-06-05 1988-12-13 Olympus Optical Co Ltd 内視鏡
WO1991001677A1 (fr) * 1989-08-01 1991-02-21 Konstantin Bob Endoscope
WO1999051153A2 (fr) * 1998-04-02 1999-10-14 Stefanow Alexander R Catheter de longueur et de forme variables
WO1999060917A2 (fr) * 1998-05-28 1999-12-02 Stefanow Alexander R Canule incorporant un filet pour la gestion, la commande hydraulique et connectee a un systeme de controle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2406823A1 (de) * 1974-02-13 1975-08-14 Peter Udo Verfahren und vorrichtung zur katheterisierung von geraden oder gewundenen roehren- und gefaessystemen
JPS63305836A (ja) * 1987-06-05 1988-12-13 Olympus Optical Co Ltd 内視鏡
WO1991001677A1 (fr) * 1989-08-01 1991-02-21 Konstantin Bob Endoscope
WO1999051153A2 (fr) * 1998-04-02 1999-10-14 Stefanow Alexander R Catheter de longueur et de forme variables
WO1999060917A2 (fr) * 1998-05-28 1999-12-02 Stefanow Alexander R Canule incorporant un filet pour la gestion, la commande hydraulique et connectee a un systeme de controle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 145 (C - 583)<3493> 10 April 1989 (1989-04-10) *

Also Published As

Publication number Publication date
AU3950800A (en) 2000-11-02
BG103344A (en) 2000-12-29

Similar Documents

Publication Publication Date Title
US5524337A (en) Method of securing ring electrodes onto catheter
ATE32132T1 (de) Anbohrformstueck aus schweissbarem kunstoff.
EP0506017B1 (fr) Arrangement de connexion de tuyaux souples
EP0303909A2 (fr) Procédé pour fabriquer un manchon d&#39;électrofusion
US4253011A (en) Plastic injection molding system having a temperature controlled electric heater element
WO2000062658A1 (fr) Catheter reversible a reglage thermique de la rigidite
US9410654B2 (en) Apparatus for rehabilitating an underground water conduit and detecting and drilling a service entrance in the conduit
JPS60252887A (ja) 電気溶接可能なソケツトおよびソケツト製造のための装置
ATE232783T1 (de) Beheizte nadelverschlussdüse
ES240732U (es) Dispositivo para conectar tubos de plastico por termosolda- dura.
US20060214418A1 (en) Arrangement with a tubular element
DE68928603D1 (de) Vorrichtung zum Beschichten von verlegten Rohren
US4882470A (en) Boring device for opening passages to branch portions of a lined main pipe line
US4218417A (en) Method and a device for repairing insulated cable which has been damaged or joined
WO1999060917A2 (fr) Canule incorporant un filet pour la gestion, la commande hydraulique et connectee a un systeme de controle
WO2000042899A2 (fr) Tete de guide electrothermique pour sonde controlable
JPS57181835A (en) Heating method of polymeric plastic material
EP0136138B1 (fr) Dispositif d&#39;étanchéite pour conduit sous pression
SE9103481D0 (sv) Electric current heater for pipes
US3182356A (en) Plastic heating device
JPH0468119B2 (fr)
JPS58203516A (ja) 制御装置の異常診断方法
NL7909296A (nl) Werkwijze en inrichting voor het vervaardigen van een buisdeel met mofeinde.
JP2788042B2 (ja) 管路の内張り方法
KR910007194B1 (ko) 고압용 호스의 제조방법 및 그 장치

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP