+

WO1998005255A1 - Dispositif pour la protection des vaisseaux lors d'interventions chirurgicales - Google Patents

Dispositif pour la protection des vaisseaux lors d'interventions chirurgicales Download PDF

Info

Publication number
WO1998005255A1
WO1998005255A1 PCT/EP1997/004092 EP9704092W WO9805255A1 WO 1998005255 A1 WO1998005255 A1 WO 1998005255A1 EP 9704092 W EP9704092 W EP 9704092W WO 9805255 A1 WO9805255 A1 WO 9805255A1
Authority
WO
WIPO (PCT)
Prior art keywords
coils
sensors
catheter
probes
signal
Prior art date
Application number
PCT/EP1997/004092
Other languages
German (de)
English (en)
Inventor
Karl-Ulrich Kettner
Christian Drüge
Stefan Wiemker
Hans-Rudolf Tinneberg
Original Assignee
Kettner Karl Ulrich
Druege Christian
Stefan Wiemker
Tinneberg Hans Rudolf
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 Kettner Karl Ulrich, Druege Christian, Stefan Wiemker, Tinneberg Hans Rudolf filed Critical Kettner Karl Ulrich
Publication of WO1998005255A1 publication Critical patent/WO1998005255A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/40—Applying electric fields by inductive or capacitive coupling ; Applying radio-frequency signals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/06—Devices, other than using radiation, for detecting or locating foreign bodies ; Determining position of diagnostic devices within or on the body of the patient

Definitions

  • the invention relates to a device for protecting vessels during surgical interventions.
  • the object of the invention is therefore to provide a device which, with the greatest possible protection of the tissue, allows reliable and timely detection that the surgical instruments come dangerously close to the vessel to be protected.
  • a plurality of probes for inductive detection of metals and / or electromagnetic fields are arranged in the catheter over the length.
  • the approach of the surgical instruments to the vessel provided with the catheter can be recognized in good time with the aid of the probes. Due to the arrangement of the probes distributed over the length, a locating field is created which surrounds the catheter in a tubular manner, so that gapless monitoring of a larger length section of the vessel to be protected is achieved.
  • the probes work on the principle of known inductive metal probes and accordingly each have a transmitter coil and a receiver coil, which are preferably wound on different lengths of a common ferrite core.
  • a transmitter coil and a receiver coil By applying a high-frequency AC voltage to the transmitter coil, an electromagnetic alternating field is generated in the vicinity of the transmitter coil, which induces a corresponding voltage in the receiver coil.
  • the electrical field and thus also the amplitude and / or phase of the voltage induced in the receiving coil is modified by electrical conductors present in the area of this electromagnetic alternating field, so that the presence of such conductors can be determined on the basis of a change in the signal tapped at the receiving coil.
  • the receiver coil also responds to electromagnetic fields originating from sources other than the transmitter coil, so that sources of such electromagnetic fields can also be located in addition to metallic conductors.
  • the only drawing figure shows a schematic section through a catheter forming the device according to the invention.
  • the catheter 10 is an elongated, flexible, tubular or solid structure, for example made of tissue-compatible silicone, in which several inductive probes 12 are embedded. Only four such probes are shown in the drawing, but the number of probes is in practice in the generally much larger.
  • Each probe 12 has a core 14 made of ferromagnetic material, for example made of ferrite, on which a transmitting coil 16 and a receiving coil 18 are wound at an axial distance from one another.
  • the transmitter coils 16 of the various sensors are connected to one another in series by bridges 20.
  • the receiving coils 18 are connected to one another in series by bridges 22. In view of the relatively small diameter of the catheter 10, this has the advantage that only four electrical connecting lines 24, 26, 28, 30 need to be led out of the catheter.
  • a capacitor 32 is connected between the connecting lines 24, 26 of the transmitter coils and forms a resonant circuit with the transmitter coils. By applying an AC voltage signal 34, this resonant circuit is excited to resonate at its natural frequency in the order of about 100 kHz.
  • a capacitor 36 is also connected between the connecting lines 28, 30 of the receiving coils 18.
  • the capacitor 36 forms with the receiving coils 18 a secondary resonant circuit which is tuned to resonance with the primary resonant circuit and is therefore excited to resonate vibrations by the electromagnetic alternating field generated by the transmitting coils 16.
  • the ferrite cores 14 of the individual probes generate an electromagnetic field in their environment, in particular a magnetic dipole field, the geometry of which is indicated in the drawing by field lines 38.
  • the distances between the individual probes 12 are selected so that, on the one hand, due to the spaces between the ferrite cores, sufficient flexibility of the catheter is ensured and, on the other hand, the dipole fields of the individual ferrite cores together form a locating field which surrounds the sensitive area of the catheter 10 without gaps and on the whole
  • the length of this area has an approximately constant geometry, so that the depth of location of the sensors is essentially independent of the position along the catheter.
  • a driver and evaluation circuit 38 is connected to the connecting lines 24 - 28 and serves to generate the AC voltage signal 34 and to evaluate the signal received by the receiving coils 18, for example the voltage across the capacitor 36.
  • the amplitude of the AC voltage signal 34 is preferably adjustable and determines the depth of location of the sensors. This amplitude is generally set so that the receiving coils 18 just deliver a measurable signal when there are no metal parts in the location area of the sensors. If a metal part, for example a surgical instrument, is then brought into the location area of the sensors, the secondary resonant circuit is damped in such a way that the signal of the receiving coils drops. This is recognized by the driver and evaluation circuit 38, which then emits a warning signal via an acoustic signal generator 40.
  • the catheter 10 is inserted into the vessel to be protected, for example a ureter of the patient, the surgeon receives an acoustic warning signal as soon as the surgical instruments come close to the ureter and thus into the location of the sensors during the intervention 12 arrive.
  • the catheter 10 is preferably immersed in a liquid which has approximately the same conductivity as the body tissue.
  • a corresponding calibration curve for the relationship between the amplitude of the alternating voltage signal 34 and the depth of location has been recorded, the distance between the metal parts and the catheter 10 can also be determined quantitatively. For example, it is possible to periodically vary the amplitude of the AC voltage signal 34 - and thus the depth of location. The distance from this object to the catheter can then be determined from the amplitude at which the metallic object is just being detected.
  • the driver and evaluation circuit 38 can then be designed, for example, in such a way that the signal transmitter 40 is triggered at intervals with a certain clock frequency when the value falls below a certain maximum distance and that the clock frequency and / or the pulse duty factor is increased with decreasing distance, until finally when the value falls below a minimum distance a continuous tone is emitted. While in the example shown only a single catheter is connected to the driver and evaluation circuit 38, embodiments are also conceivable in which two catheters are connected in parallel to the same driver and evaluation circuit. In this embodiment, the device is particularly suitable for protecting the ureters leading to the bladder from both kidneys of the patient during interventions in the abdomen.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pathology (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Endoscopes (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

L'invention concerne un dispositif pour la protection des vaisseaux lors d'interventions chirurgicales, comportant un cathéter (10) introduit dans le vaisseau, caractérisé en ce que plusieurs sondes (12) sont disposées dans le cathéter, réparties sur sa longueur, pour permettre la détection par induction des métaux et/ou des champs électromagnétiques.
PCT/EP1997/004092 1996-08-02 1997-07-28 Dispositif pour la protection des vaisseaux lors d'interventions chirurgicales WO1998005255A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19631303.1 1996-08-02
DE1996131303 DE19631303C2 (de) 1996-08-02 1996-08-02 Vorrichtung zum Schutz von Gefäßen bei chirurgischen Eingriffen

Publications (1)

Publication Number Publication Date
WO1998005255A1 true WO1998005255A1 (fr) 1998-02-12

Family

ID=7801647

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/004092 WO1998005255A1 (fr) 1996-08-02 1997-07-28 Dispositif pour la protection des vaisseaux lors d'interventions chirurgicales

Country Status (2)

Country Link
DE (1) DE19631303C2 (fr)
WO (1) WO1998005255A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7241758B2 (en) 1999-11-16 2007-07-10 Boehringer Ingelheim Pharmaceuticals, Inc. Compounds useful as anti-inflammatory agents

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6261247B1 (en) 1998-12-31 2001-07-17 Ball Semiconductor, Inc. Position sensing system
US11331150B2 (en) 1999-10-28 2022-05-17 Medtronic Navigation, Inc. Method and apparatus for surgical navigation
US7366562B2 (en) 2003-10-17 2008-04-29 Medtronic Navigation, Inc. Method and apparatus for surgical navigation
US6499488B1 (en) 1999-10-28 2002-12-31 Winchester Development Associates Surgical sensor
US8644907B2 (en) 1999-10-28 2014-02-04 Medtronic Navigaton, Inc. Method and apparatus for surgical navigation
US8239001B2 (en) 2003-10-17 2012-08-07 Medtronic Navigation, Inc. Method and apparatus for surgical navigation

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB994400A (en) * 1962-07-13 1965-06-10 Bang & Olufsen Produktionssels Apparatus for detecting and localizing extraneous objects of electrically conductingor magnetically permeable material in human or animal tissue
DE2842203A1 (de) * 1978-09-28 1980-04-10 Dieter Ing Grad Dr Med Koehler Vorrichtung zum lokalisieren von metallteilen in biologischen geweben
US4526177A (en) * 1983-06-24 1985-07-02 Rudy Michael A Electronic anatomical probe
WO1986002539A1 (fr) * 1984-11-01 1986-05-09 Pekka Johannes Nyberg Dispositif pour localiser des objets metalliques dans le corps humain ou animal
WO1993000039A1 (fr) * 1991-06-25 1993-01-07 Ulrich Steinbeck Detecteur de corps etrangers metalliques dans un corps vivant
WO1993004628A1 (fr) * 1991-09-04 1993-03-18 Navion Biomedical Corporation Systeme de determination de la profondeur, de la position et de l'orientation d'un catheter
US5262772A (en) * 1989-08-16 1993-11-16 Bio Medic Data Systems, Inc. Transponder scanner

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445501A (en) * 1981-05-07 1984-05-01 Mccormick Laboratories, Inc. Circuits for determining very accurately the position of a device inside biological tissue
US5423321A (en) * 1993-02-11 1995-06-13 Fontenot; Mark G. Detection of anatomic passages using infrared emitting catheter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB994400A (en) * 1962-07-13 1965-06-10 Bang & Olufsen Produktionssels Apparatus for detecting and localizing extraneous objects of electrically conductingor magnetically permeable material in human or animal tissue
DE2842203A1 (de) * 1978-09-28 1980-04-10 Dieter Ing Grad Dr Med Koehler Vorrichtung zum lokalisieren von metallteilen in biologischen geweben
US4526177A (en) * 1983-06-24 1985-07-02 Rudy Michael A Electronic anatomical probe
WO1986002539A1 (fr) * 1984-11-01 1986-05-09 Pekka Johannes Nyberg Dispositif pour localiser des objets metalliques dans le corps humain ou animal
US5262772A (en) * 1989-08-16 1993-11-16 Bio Medic Data Systems, Inc. Transponder scanner
WO1993000039A1 (fr) * 1991-06-25 1993-01-07 Ulrich Steinbeck Detecteur de corps etrangers metalliques dans un corps vivant
WO1993004628A1 (fr) * 1991-09-04 1993-03-18 Navion Biomedical Corporation Systeme de determination de la profondeur, de la position et de l'orientation d'un catheter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7241758B2 (en) 1999-11-16 2007-07-10 Boehringer Ingelheim Pharmaceuticals, Inc. Compounds useful as anti-inflammatory agents

Also Published As

Publication number Publication date
DE19631303C2 (de) 1998-07-02
DE19631303A1 (de) 1998-02-05

Similar Documents

Publication Publication Date Title
DE60207636T2 (de) Medizinische Vorrichtung mit einem Positionssensor
DE69408826T2 (de) Magnetisches Resonanzdarstellungssystem zur Verfolgung eines Arzneigeräts
DE69123158T2 (de) Aufspürer chirurgischer werkzeuge, mit kapazitiver ankopplung
EP1021730B1 (fr) Système d'imagerie par résonance magnétique et filtre à veine cave pour ce système
DE69736826T2 (de) Radiofrequenzspulen für Kernresonanz
DE69124810T2 (de) Suchgerät für chirurgische instrumente mit einem batteriebetriebenen markierer
DE69734714T2 (de) Mit einer öffnung versehener katheter
DE69733341T2 (de) Ortungsverfahren mit feldbestätigungssequenzen
DE60213947T2 (de) Passive implantierbare und einführbare Etiketten
DE69634035T2 (de) System zur bilderzeugung durch magnetische resonanz und katheter für eingriffsverfahren
DE69721985T2 (de) Gegeninduktionskorrektur
DE112008002563B4 (de) Induktiver Stellungssensor
DE60207592T2 (de) Vorrichtung für die elastographie mittels magnetresonanzbildgebung
DE10113661A1 (de) Katheter zur Anwendung in einem Magnetresonanz-Bildgerät
DE102015224158A1 (de) Signalsender für Pilotton-Navigation
DE10249239A1 (de) Magnetresonanz-Bildgerät mit elektrischer Zusatzeinrichtung
EP3650878B1 (fr) Bobine locale avec transmetteur de tonalité pilote
DE102006058848A1 (de) Magnetresonanzanlage mit einem Grundkörper und einer Patientenliege
WO1998005255A1 (fr) Dispositif pour la protection des vaisseaux lors d'interventions chirurgicales
DE19548000C1 (de) Vorrichtung zur Ortung von Konkrementen im Körper eines Patienten
EP0529440A1 (fr) Appareil de mesure de la position d'une tôle métallique au moyen inductif
DE102010046948A1 (de) Chirurgisches Zielgerät zum Positionieren von Bohrkanälen im Knochen
EP2668472B1 (fr) Dispositif cylindrique, système de mesure de la vitesse de l'onde de pouls et procédé de mesure de la vitesse de l'onde de pouls
EP0942291A2 (fr) Dispositif de mesure de la capacité de conducteurs électriques
DE3634378A1 (de) Elektromagnetischer wandler, insbesondere schallsender fuer medizinische anwendungszwecke

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

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

Ref country code: JP

Ref document number: 1998507562

Format of ref document f/p: F

122 Ep: pct application non-entry in european phase
点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载