WO2000042899A3 - Guide electro-thermal head for controllable sonde - Google Patents

Guide electro-thermal head for controllable sonde Download PDF

Info

Publication number
WO2000042899A3
WO2000042899A3 PCT/BG2000/000004 BG0000004W WO0042899A3 WO 2000042899 A3 WO2000042899 A3 WO 2000042899A3 BG 0000004 W BG0000004 W BG 0000004W WO 0042899 A3 WO0042899 A3 WO 0042899A3
Authority
WO
WIPO (PCT)
Prior art keywords
sonde
segment
controllable
guide
thermal head
Prior art date
Application number
PCT/BG2000/000004
Other languages
French (fr)
Other versions
WO2000042899A2 (en
Inventor
Alexander R Stefanow
Ivan R Stefanow
Ranguel N Petkov
Original Assignee
Alexander R Stefanow
Ivan R Stefanow
Ranguel N Petkov
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 Alexander R Stefanow, Ivan R Stefanow, Ranguel N Petkov filed Critical Alexander R Stefanow
Priority to AU22715/00A priority Critical patent/AU2271500A/en
Publication of WO2000042899A2 publication Critical patent/WO2000042899A2/en
Publication of WO2000042899A3 publication Critical patent/WO2000042899A3/en

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

Abstract

A guide electro-thermal head for controllable sonde is proposed. It consists of a metal ring with segment inserted chips of Zener diodes which are always in opposite connection when supply of power to two segments and on the account of the thermal effect from the junction of the diode which is directly proportional to the voltage of the junction and the current through it, mainly the segment of the opposite connected diode is heated. In this way the thermal energy of the front of the guide pipe in the definite segment is localised. Change of the direction and the value of the voltage toward the set opposite each other segments changes as well the speed of turning of the adjacent material of thermoelastic pipe which turns itself and around the head due to the activity of the spring inserted in the wall of the guide pipe and hydraulic pressure. As a result of this the direction of the penetration of the sonde is regulated and controlled.
PCT/BG2000/000004 1999-01-25 2000-01-25 Guide electro-thermal head for controllable sonde WO2000042899A2 (en)

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
BG103110A BG103110A (en) 1999-01-25 1999-01-25 Guiding electrothermal head for a controllable drill
BG103110 1999-01-25

Publications (2)

Publication Number Publication Date
WO2000042899A2 WO2000042899A2 (en) 2000-07-27
WO2000042899A3 true 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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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
AU2271500A (en) 2000-08-07
WO2000042899A2 (en) 2000-07-27
BG103110A (en) 2000-07-31

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