DE10038737A1 - Catheter for magnetic resonance supported interventions, comprises a hollow section through which a media flows, and supply and removal openings - Google Patents

Catheter for magnetic resonance supported interventions, comprises a hollow section through which a media flows, and supply and removal openings

Info

Publication number
DE10038737A1
DE10038737A1 DE10038737A DE10038737A DE10038737A1 DE 10038737 A1 DE10038737 A1 DE 10038737A1 DE 10038737 A DE10038737 A DE 10038737A DE 10038737 A DE10038737 A DE 10038737A DE 10038737 A1 DE10038737 A1 DE 10038737A1
Authority
DE
Germany
Prior art keywords
catheter
magnetic resonance
supply
interventions
hollow section
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.)
Withdrawn
Application number
DE10038737A
Other languages
German (de)
Inventor
Oliver Wendt
Peter Diesing
Original Assignee
Oliver Wendt
Peter Diesing
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 Oliver Wendt, Peter Diesing filed Critical Oliver Wendt
Priority to DE10038737A priority Critical patent/DE10038737A1/en
Publication of DE10038737A1 publication Critical patent/DE10038737A1/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0127Magnetic means; Magnetic markers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/39Markers, e.g. radio-opaque or breast lesions markers
    • A61B2090/3954Markers, e.g. radio-opaque or breast lesions markers magnetic, e.g. NMR or MRI

Abstract

A catheter for magnetic resonance supported interventions, enables a magnetic resonance signal delivery media (2a) to be placed in a chosen location to give an intense signal. The medium is placed in or flows in a hollow section (2b). The catheter (1) has at least one supply and removal point.

Description

Die Erfindung betrifft einen Katheter für magnetresonanztomographische Untersuchungen, der in MR-tomographischen Schnittbildern sichtbar gemacht werden kann und mit dem sich anatomische Strukturen wie Blutgefäße signalintensiv darstellen lassen. The invention relates to a catheter for magnetic resonance examinations which can be made visible in the MR tomographic section images and with which anatomical structures such as blood vessels can be represented signal intensively.

Die Magnetresonanztomographie ist ein zunehmend verbreitetes bildgebendes Verfahren mit starken Magnetfeldern ohne Strahlung und basiert in erster Linie auf gezielter Anregung und Messung von Wasserstoffatomen unter Resonanz. Magnetic resonance imaging is an increasingly common imaging method with strong magnetic fields without radiation and is based primarily on specific excitation and measurement of hydrogen atoms under resonance. Dabei hängt die Signalintensität wesentlich von der Anzahl der am Meßort vorhandenen Wasserstoffatomkerne ab, so daß sich unterschiedliche Wasserstoffdichten im MR-tomographischen Schnittbild in entsprechende Signalintensitätsstufen differenzieren lassen. The signal intensity depends largely on the number of units at the measuring point hydrogen nuclei so that different hydrogen densities can be differentiated in the MR tomographic slice image into corresponding signal intensity levels. Ist die Anzahl dieser Wasserstoffatomkerne in einem Körper jedoch nur gering, so ist auch das Signal dementsprechend schwach und die Meßstelle oder das Meßobjekt ist im Schnittbild nur schwach oder gar nicht zu erkennen. If the number of hydrogen nuclei in a body but only slightly, so the signal is correspondingly weak, and the measurement point or the measurement object is only weakly or not at all visible in the cut. Dies stellt zugleich ein großes Problem konventioneller Katheter dar, da diese aufgrund ihrer Materialbeschaffenheit keine Signalintensität hervorrufen und damit deren eindeutige Lage und Abbildung im MR-tomographischen Schnittbild bzw. im darzustellenden Körperteil nicht sichtbar gemacht werden kann. This also represents a major problem of conventional catheters, as these so that their unique position and image in the MR-tomographic slice image and the imaged body part can not be made visible cause any signal intensity due to their material properties and.

Mit steigender Indikationsstellung in der MR-Diagnostik und Therapie, wird die Forderung nach visualisierbaren Kathetern und Körperteilen wie z. With increasing indications in the MR-diagnostics and therapy, the requirement for visualizable catheters and body parts such as is. B. von Herzgefäßen immer deutlicher. B. of heart vessels more obvious.

Die Erfindung hat sich der Lösung dieser Aufgabe gestellt, durch die Verwendung von Kathetern, die mit signalgebenden Medien versehen werden können oder den Transport dieser signalgebenden Medien in einen Körper ermöglichen. The invention has provided the solution to this problem, by the use of catheters which may be provided with signaling media or allowing the transport of these signal-generating media in a body.

Die Erfindung löst das Problem durch die Unterbringung oder Durchströmung signalgebender Medien in speziell gestalteten Katheterschläuchen. The invention solves the problem by the placement or flow signal-generating media in specially designed catheter tubes. Die signalgebenden Medien können dabei in Hohlräumen oder direkt auf der Oberfläche der Katheterschläuche angeordnet sein. The signal-generating media can be arranged in cavities or directly on the surface of the catheter tubes. Zum Durchströmen des signalgebenden Mediums durch einen Katheter bis zum Untersuchungsort, befindet sich mindestens eine Zu- und Abflußöffnung am Katheter. To flow through the signal-generating medium through a catheter up to the examination site, is located at least one inlet and outlet opening of the catheter.

Ausführungsbeispiele zu diesen Kathetern werden anhand der Fig. 1 bis 7 gezeigt. Embodiments of these catheters are shown with reference to FIGS. 1 to 7. Dabei zeigen: They show:

Fig. 1a einen Querschnitt eines Katheters integrierter Kontrastmittelunterbringung, FIG. 1a is a cross section of a catheter integrated contrast medium housing,

Fig. 1b einen Querschnitt eines Katheters mit Kontrastmittelapplizierung durch den Katheter, FIG. 1b a cross section of a catheter with Kontrastmittelapplizierung through the catheter,

Fig. 2 einen Katheter mit oberflächennahen kontrastgebenden Schichten, Fig. 2 shows a catheter with near-surface opacifying layers,

Fig. 3 einen Katheter mit lokaler Signalquelle, Fig. 3 shows a catheter with a local signal source,

Fig. 4 einen Katheter mit fein dispers verteilten kontrastfähigen Medien, Fig. 4 shows a catheter with finely dispersely distributed contrast media enabled,

Fig. 5 einen Katheter mit in radialer Richtung angeordneten Öffnungen zur Applizierung von Konstrastmittel, Fig. 5 shows a catheter disposed in the radial direction of openings for application of contrast agents,

Fig. 6 einen Katheter mit in axialer Richtung angeordneten Öffnungen zur Applizierung von Kontrastmittel, Fig. 6 shows a catheter disposed in the axial direction, openings for application of a contrast agent,

Fig. 7 beispielhafte Darstellungen von Katheterquerschnitten mit Anordnungen von signalgebenden Lumina und weiteren Hohlräumen in einem Katheter. Fig. 7 are explanatory views of catheter sections with arrays of signaling lumens and other cavities in a catheter.

Gemäß der Erfindung beinhaltet der in Fig. 1a dargestellte Katheter 1 ein im Katheter eingeschlossenes MR-signalgebendes Medium 2 a und ein Lumen 3 , das z. According to the invention the catheter 1 shown in Fig. 1a includes a trapped in the catheter MR signal forming medium 2a and a lumen 3, z. B. zur Injektion von Flüssigkeiten aus diagnostischen oder therapeutischen Gründen verwendet werden kann. B. can be used for injection of fluids for diagnostic or therapeutic reasons. Die Fig. 1b stellt beispielhaft eine weitere Ausgestaltung des Katheters 1 dar. Hierbei kann das MR-signalgebende Medium 2 a über einen Zugang und durch eine Öffnung 4 einem Körper zugefügt werden. FIG. 1b exemplifies a further embodiment of the catheter 1. Here, the MR-signal-generating medium 2 a can be added via an access through an opening 4 one body.

Beispielsweise ist entsprechend Fig. 2 das MR-signalgebende Medium 2 a zwischen dem Katheterschlauch 1 und einem Mantel 5 , der ein Schlauch sein kann, plaziert. For example, corresponding to FIG. 2, the MR-signal-generating medium 2 a between the catheter tube 1 and a casing 5 which can be a tube placed.

Häufig wird bei den beschriebenen Anwendungen die genaue Position eines Teils (z. B. eines Ballons) des Katheters benötigt, der dann durch einen in Fig. 3 beschriebenen örtlich begrenzten MR-signalgebenden Bereich lokalisiert werden kann. Often the exact position of a part (z. B. a balloon) of the catheter which can then be isolated by a described in Fig. 3 localized MR-signal-emitting area is required in the described applications. Dabei wird auf einem Teilabschnitt des Katheters 1 das signalgebende Medium 2 a radial aufgebracht und durch eine zusätzliche Deckschicht 6 , die z. Here, the signal-generating medium 2 is a applied radially and by an additional covering layer 6 on a part of portion of the catheter 1, z. B ein Schlauchabschnitt sein kann, abgedeckt. B a hose section can be covered.

Eine weitere Möglichkeit zur Anpassung der signalgebenden Eigenschaften eines Katheters ist gemäß Fig. 4 das auf die signalgebenden Eigenschaften abgestimmte fein disperse Einbringen von MR-signalgebenden Medium 2 a in den Katheterschlauch 1 , wodurch besonders homogene Materialeigenschaften des Katheters erreicht werden können. A further possibility for adapting the signaling properties of a catheter according to Fig. 4, the signal-generating properties finely disperse the introduction of MR-signal-generating medium 2 a in the catheter tube 1, whereby particularly homogeneous material properties of the catheter can be achieved tuned.

In Fig. 5 und Fig. 6 werden die Möglichkeiten dargestellt, durch Öffnungen 4 in dem Katheter 1 ein MR-signalgebendes Medium 2 a zu injizieren. In Fig. 5 and Fig. 6, the options are displayed, through openings 4 in the catheter 1, an MR signal forming medium 2 a to inject. Dabei können diese Öffnungen 4 gemäß der Erfindung entsprechend Fig. 5 in radialer Richtung an dem Katheter 1 angeordnet sein oder entsprechend Fig. 6 in axialer Richtung die Applizierung von signalgebenden Medien 2 a ermöglichen. In this case, these openings 4, the Applizierung of signaling media 2 a can according to the invention corresponding to Fig. 5 may be arranged in radial direction on the catheter 1, or according to Fig. 6 in the axial direction enable.

Die Möglichkeiten zur Anordnung der Lumina für das signalgebende Medium 2 a und der Lumina 3 zur Einführung weiterer diagnostischer oder therapeutischer Hilfsmittel ist in Fig. 7 dargestellt. The possibilities for the arrangement of the lumina for the signaling medium 2 a and of the lumens 3 for introduction of further diagnostic or therapeutic tool is shown in Fig. 7.

Bezugszeichenliste LIST OF REFERENCE NUMBERS

1 1

Katheter catheter

2 2

a signalgebendes Medium a signal forming medium

2 2

b Lumen b lumen

3 3

Hohlraum im Katheter Lumen in the catheter

4 4

Radiale/Axiale Öffnungen Radial / axial openings

5 5

Mantel coat

6 6

Lokale Deckschicht local top layer

Claims (6)

1. Katheter für MR-gestützte Interventionen, der sich durch Plazieren von MR signalgebenden Medien ( 2 a) vollständig oder in ausgewählten Abschnitten im MR tomographischen Schnittbild signalintensiv abbilden läßt und/oder mit dessen Hilfe sich MR-signalgebende Medien ( 2 a) ( 1 ) einem Körper zuführen lassen. Can 1. catheter for MR-guided interventions, which signaling by placing MR media (2 a) completely or tomographic in selected portions of the MR slice image mapped signal-intensive and / or with the aid of which the MR signal-generating media (2 a) (1 let out a body).
2. Katheter nach Anspruch 1, ausgezeichnet dadurch, daß sich das MR-signalgebende Medium ( 2 a) in mindestens einem Hohlraum ( 2 b) unterbringen oder durchströmen läßt. 2. A catheter according to claim 1, distinguished by the fact that (2 a) in at least one cavity (2 b) to accommodate or flow through the MR-signal-generating medium can.
3. Katheter nach Anspruch 1, ausgezeichnet dadurch daß MR-signalgebendes Medium ( 2 a) fein dispers im Material des Katheters ( 1 ) verteilt ist. 3. A catheter according to claim 1, distinguished by the fact that MR-signal forming medium (2 a) is finely dispersed throughout the material of the catheter (1).
4. Katheter nach Anspruch 1, ausgezeichnet dadurch, daß der Katheter ( 1 ) mindestens einen Zu- und Abfluß für das MR-signalgebende Medium ( 2 a) in radialer und/oder axialer Anordnung ( 4 ) am Katheter besitzt. 4. A catheter according to claim 1, distinguished by the fact that the catheter (1) at least one inlet and outlet for the MR-signal-generating medium (2a) in the radial and / or axial arrangement (4) has on the catheter.
5. Katheter nach Anspruch 1, ausgezeichnet dadurch, daß das MR-signalgebende Medium ( 2 a) für das umgebende Medium löslich oder unlöslich aufgebracht ist. 5. A catheter according to claim 1, distinguished by the fact that the MR-signal-generating medium (2 a) is applied either soluble or insoluble for the surrounding medium.
6. Katheter nach Anspruch 1, ausgezeichnet dadurch, daß für die Zuführung und/oder Unterbringung von Stoffen wie Medikamenten, Infusionslösungen, Führungsdrähten, Implantaten oder medizinischen Instrumenten mindestens ein Hohlraum ( 3 ) im Katheter ( 1 ) vorhanden ist. 6. A catheter according to claim 1, distinguished by the fact that for the supply and / or storage of materials such as medicines, infusion solutions, guide wires, implants or medical instruments, at least one cavity (3) in the catheter (1) is present.
DE10038737A 2000-08-02 2000-08-02 Catheter for magnetic resonance supported interventions, comprises a hollow section through which a media flows, and supply and removal openings Withdrawn DE10038737A1 (en)

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DE10038737A DE10038737A1 (en) 2000-08-02 2000-08-02 Catheter for magnetic resonance supported interventions, comprises a hollow section through which a media flows, and supply and removal openings

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US8880185B2 (en) 2010-06-11 2014-11-04 Boston Scientific Scimed, Inc. Renal denervation and stimulation employing wireless vascular energy transfer arrangement
US8939970B2 (en) 2004-09-10 2015-01-27 Vessix Vascular, Inc. Tuned RF energy and electrical tissue characterization for selective treatment of target tissues
US8951251B2 (en) 2011-11-08 2015-02-10 Boston Scientific Scimed, Inc. Ostial renal nerve ablation
US8974451B2 (en) 2010-10-25 2015-03-10 Boston Scientific Scimed, Inc. Renal nerve ablation using conductive fluid jet and RF energy
US9023034B2 (en) 2010-11-22 2015-05-05 Boston Scientific Scimed, Inc. Renal ablation electrode with force-activatable conduction apparatus
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US9119632B2 (en) 2011-11-21 2015-09-01 Boston Scientific Scimed, Inc. Deflectable renal nerve ablation catheter
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US9408661B2 (en) 2010-07-30 2016-08-09 Patrick A. Haverkost RF electrodes on multiple flexible wires for renal nerve ablation
US9420955B2 (en) 2011-10-11 2016-08-23 Boston Scientific Scimed, Inc. Intravascular temperature monitoring system and method
US9433760B2 (en) 2011-12-28 2016-09-06 Boston Scientific Scimed, Inc. Device and methods for nerve modulation using a novel ablation catheter with polymeric ablative elements
US9463062B2 (en) 2010-07-30 2016-10-11 Boston Scientific Scimed, Inc. Cooled conductive balloon RF catheter for renal nerve ablation
US9486355B2 (en) 2005-05-03 2016-11-08 Vessix Vascular, Inc. Selective accumulation of energy with or without knowledge of tissue topography
US9579030B2 (en) 2011-07-20 2017-02-28 Boston Scientific Scimed, Inc. Percutaneous devices and methods to visualize, target and ablate nerves
US9649156B2 (en) 2010-12-15 2017-05-16 Boston Scientific Scimed, Inc. Bipolar off-wall electrode device for renal nerve ablation
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US10188457B2 (en) 2003-09-12 2019-01-29 Vessix Vascular, Inc. Selectable eccentric remodeling and/or ablation
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US9125667B2 (en) 2004-09-10 2015-09-08 Vessix Vascular, Inc. System for inducing desirable temperature effects on body tissue
US8939970B2 (en) 2004-09-10 2015-01-27 Vessix Vascular, Inc. Tuned RF energy and electrical tissue characterization for selective treatment of target tissues
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US9974607B2 (en) 2006-10-18 2018-05-22 Vessix Vascular, Inc. Inducing desirable temperature effects on body tissue
US10213252B2 (en) 2006-10-18 2019-02-26 Vessix, Inc. Inducing desirable temperature effects on body tissue
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US9463062B2 (en) 2010-07-30 2016-10-11 Boston Scientific Scimed, Inc. Cooled conductive balloon RF catheter for renal nerve ablation
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US9358365B2 (en) 2010-07-30 2016-06-07 Boston Scientific Scimed, Inc. Precision electrode movement control for renal nerve ablation
US9155589B2 (en) 2010-07-30 2015-10-13 Boston Scientific Scimed, Inc. Sequential activation RF electrode set for renal nerve ablation
US8974451B2 (en) 2010-10-25 2015-03-10 Boston Scientific Scimed, Inc. Renal nerve ablation using conductive fluid jet and RF energy
US9220558B2 (en) 2010-10-27 2015-12-29 Boston Scientific Scimed, Inc. RF renal denervation catheter with multiple independent electrodes
US9848946B2 (en) 2010-11-15 2017-12-26 Boston Scientific Scimed, Inc. Self-expanding cooling electrode for renal nerve ablation
US9089350B2 (en) 2010-11-16 2015-07-28 Boston Scientific Scimed, Inc. Renal denervation catheter with RF electrode and integral contrast dye injection arrangement
US9668811B2 (en) 2010-11-16 2017-06-06 Boston Scientific Scimed, Inc. Minimally invasive access for renal nerve ablation
US9326751B2 (en) 2010-11-17 2016-05-03 Boston Scientific Scimed, Inc. Catheter guidance of external energy for renal denervation
US9060761B2 (en) 2010-11-18 2015-06-23 Boston Scientific Scime, Inc. Catheter-focused magnetic field induced renal nerve ablation
US9192435B2 (en) 2010-11-22 2015-11-24 Boston Scientific Scimed, Inc. Renal denervation catheter with cooled RF electrode
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US9649156B2 (en) 2010-12-15 2017-05-16 Boston Scientific Scimed, Inc. Bipolar off-wall electrode device for renal nerve ablation
US9220561B2 (en) 2011-01-19 2015-12-29 Boston Scientific Scimed, Inc. Guide-compatible large-electrode catheter for renal nerve ablation with reduced arterial injury
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US9579030B2 (en) 2011-07-20 2017-02-28 Boston Scientific Scimed, Inc. Percutaneous devices and methods to visualize, target and ablate nerves
US9186209B2 (en) 2011-07-22 2015-11-17 Boston Scientific Scimed, Inc. Nerve modulation system having helical guide
US9186210B2 (en) 2011-10-10 2015-11-17 Boston Scientific Scimed, Inc. Medical devices including ablation electrodes
US9420955B2 (en) 2011-10-11 2016-08-23 Boston Scientific Scimed, Inc. Intravascular temperature monitoring system and method
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