WO2001037929A1 - Filterdurchführung - Google Patents
Filterdurchführung Download PDFInfo
- Publication number
- WO2001037929A1 WO2001037929A1 PCT/EP2000/011518 EP0011518W WO0137929A1 WO 2001037929 A1 WO2001037929 A1 WO 2001037929A1 EP 0011518 W EP0011518 W EP 0011518W WO 0137929 A1 WO0137929 A1 WO 0137929A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filter
- housing
- bushing according
- disks
- collar
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/372—Arrangements in connection with the implantation of stimulators
- A61N1/375—Constructional arrangements, e.g. casings
- A61N1/3752—Details of casing-lead connections
- A61N1/3754—Feedthroughs
Definitions
- the invention relates to a uni or multipolar electrical filter bushing for an implantable electronic therapy device, for example a pacemaker.
- the bushing is designed for insertion into an opening in a housing of the therapy device and has contact elements which are arranged galvanically separated from one another and a fastening means for modification with a bushing body and filter means comprising a wall of the housing, which on the one hand each with one of the contact elements and on the other hand with the one Reference potential-conducting housing are electrically connected.
- the filter means usually comprise capacitive elements.
- the contact elements are usually designed as rod-shaped pins. From the American patent US-PS 4 1 52 540 a filter bushing for use in an electronic pacemaker is known, in which a filter capacitor is provided within a bore in the insulation ceramic of the bushing.
- the known electrical feedthroughs have the disadvantage that the capacitive filter means and the contacting areas between the electrical pins and the reference potential are made glass-tight. This leads - in particular taking into account the pre-assembly of the filter means - to a considerable effort in the manufacture of such a bushing and when inserting the bushing in the housing of the therapy device to be implanted and its subsequent test for vacuum tightness.
- the filter means firmly connected to the bushing are disadvantageously exposed to a high thermal load if the bushing is welded into a corresponding housing opening of the electronic therapy device.
- this requires a very firm mechanical connection of the filter means to the feedthrough and, on the other hand, often leads to an irreversible change in the electrical characteristics of the filter means, which usually has an unpredictable degree of disruptive effects on the operational management of the therapy device to be implanted.
- the invention is therefore based on the object of specifying a unipolar or multipolar implementation of the type mentioned at the outset, which can be manufactured particularly inexpensively and can be installed with a relatively low thermal load on the filter medium in such a way that, in addition, the Installation the risk of a change in the electrical properties of the filter medium is largely excluded.
- a filter bushing of the type mentioned at the outset in which the filter means are arranged outside the bushing body and are connected to it in such a way that, when inserted, they project into the interior of the housing essentially freely suspended.
- the invention includes the knowledge that special advantages in the manufacture, assembly and installation test associated with a vacuum leak test of a filter medium-containing uni- or multipolar electrical leadthrough can be achieved after installation in a housing of an implantable electronic therapy device, if for the Implementation and the electrical filter means a spatial assignment is selected, in which a contact between the filter means and the housing wall is ensured and at the same time the essentially non-vacuum-tight construction of the filter means used can be neglected in a favorable manner.
- This has the advantage that the actual sealing element, that is to say the insulation ceramic and its connections with the flange and pins, can be tested for leak tightness independently of the filter means.
- a feedthrough body that can be inserted into this opening and has a preferably flange-shaped fastening means for connection to the housing and with filter means designed as capacitance on the one hand, in each case with one of the electrical ones arranged galvanically separated from one another Pins of the leadthrough and, on the other hand, each have an electrically conductive connection with the housing of the electronic therapy device carrying a reference potential, provided to arrange the filter means outside the leadthrough body while avoiding physical integrity.
- the filter means are connected to the lead-through body in such a way that they project into the interior of the housing essentially freely floating.
- a further advantage is a relief with regard to thermal or mechanical stresses, so that mechanical damage, in particular to the filter, is avoided which cannot be detected or can only be detected to a limited extent.
- the filter means form a filter block, which is arranged lying on the same axis with the lead-through body of the lead-through. Such an arrangement simplifies the preassembly of the bushing according to the invention.
- the fastening means provided on the leadthrough body for connecting the leadthrough to the housing of the therapy device to be implanted is preferably designed as an annular flange and has a metallic collar which extends in the direction of the interior of the housing. At its free end, the filter block is attached to the grommet, avoiding physical integrity.
- the ring flange forms the necessary stop when inserting the bushing in a housing opening in order to carry out the bushing with a to fix the vacuum-tight welded connection between the lead-through body and the housing wall.
- the metallic collar is designed to be flexible. According to the preferred embodiment of the invention, this flexibility is achieved in a simple manner in that the metallic collar is formed from a band having a lamella structure. The lamellae are arranged on the collar in an essentially evenly distributed manner, so that the collar essentially has the shape of a crown.
- the cylindrical filter block When pre-assembling the bushing, the cylindrical filter block is inserted into the space delimited by the crown-shaped collar. It is provided that the jacket of the filter block is supported on the inside of the lamellae of the collar.
- the filter block has a plurality of ceramic disks which are arranged one above the other in layers.
- a number of disks designed as a metallized substrate corresponding to the number of electrical pins is provided, which are arranged between two non-metallized ceramic layers to form the capacitive filter elements of the filter block.
- the ceramic disks designed as a metallized substrate each have only one of those provided on the crown-shaped collar Slat are contacted.
- the filter block has a total of four ceramic disks designed as a coated substrate and four coating-free ceramic disks, which - alternately layered one above the other - are combined to form the filter block.
- an additional connection pin for the galvanic connection to the signal generation and processing device of the electronic therapy device is provided on the collar. This means that this device can also be connected to the reference potential in a simple manner.
- this connection is in the form of a band, which results in particular simplifications in the preassembly of the signal generation and processing device.
- Figure 1 shows a preferred embodiment of the invention in perspective
- FIG. 2 shows the embodiment of the invention shown in FIG. 1 in a partial sectional view from the side
- Figure 3 shows the embodiment shown in Figure in bottom view as well
- Figure 4 shows the view of a section along the line A ... A according
- FIG. 5 shows an alternative embodiment as a sectional view along the line A ... A according to FIG. 1
- the multipolar electrical feedthrough 1 shown in FIG. 1 has an essentially cylindrical feedthrough body 2 which carries an annular flange 3. Attached to this flange is a collar 5 pointing in the direction of the interior 4 of a housing (not shown) (compare position 4 in FIG. 4) of an implantable therapy device, which ends at its free end in individual slats 6.
- the lamellae 6 have the same shape and size and are evenly distributed on the circumference of the collar.
- the collar therefore has the shape of a crown, which is particularly flexible in its lamella area.
- the interior of this crown is filled by the filter block 7 formed from a plurality of capacitive filter elements (compare positions 19 to 23 in FIG. 4), which is galvanically connected on the outside to the individual fins 6.
- Pins 8 forming electrical contact elements extend from a connection area 9 of the bushing 1 on the head side into the housing interior 4 and penetrate both the bushing body 2 and the filter block 7.
- the type of contacting of the pins within the filter block 7 of the bushing 1 is shown in FIG 4 shown.
- the ends 1 1, 1 2 of the pins 8 are connected to a header 10 or a signal generation and processing device 1 4 of the implantable electronic therapy device.
- FIGS. 2 and 3 show the shape of the bushing body 2 of the multipolar electrical bushing 1 in detail.
- the lead-through body 2 consists of an essentially cylindrical sleeve 2.1, to which the annular flange 3 is molded, and a ceramic insert 2.2, which completely fills the interior of the sleeve.
- the mutually contacting jacket surfaces of the sleeve 2.1 and the ceramic insert 2.2 are connected to one another in a vacuum-tight manner by a sealing joining means 17 such as solder, adhesive or, as preferred in the specific case, gold.
- the pins 8 are guided in bores through this ceramic insert in a vacuum-tight manner.
- the adhesive that connects the corresponding lateral surfaces is designated by 1 8.
- the funnel-shaped widening 2.3 of the holes provided in the ceramic insert 2.2 for the pins 8 on the header side 9 of the bushing 1 allows a slight degree of radial mobility of the ends of the pins 8 fixed here from the ceramic insert, so that during the assembly of the header (Compare the position 1 3 in Figure 1) after placing the bushing 1 in the housing of the implantable electrical therapy device simplifications.
- the main purpose of the funnel-shaped extensions or cone countersinks 2.3 is the electrical insulation of the pins and in particular the pin flanges from one another, in which leakage currents on the ceramic surface are avoided.
- FIG. 4 shows the filter block 7 of the multipolar electrical feedthrough 1 in a schematic partial sectional illustration.
- the filter block 7 has a plurality of ceramic disks 19, 20, 21, 22, 23 arranged one above the other, of which the disks 20, 21, 22 and 23 as metallized substrate are formed.
- the disks 19 are each of identical design and are arranged between two layers having a metallization. This layer structure, consisting of alternately successive ceramic disks and layers having a metallization, is preferably achieved by ceramic disks, which are each metallized in a suitable manner. In the ceramic disks 1 9 four holes of the same size are provided for guiding the pins 8.
- the disks 20, 21, 22 and 23 form a capacitor in pairs, the non-metallized ceramic disk 19 located between them serving as a dielectric.
- the disks 20, 21, 22, 23 designed as a metallized substrate are likewise of identical design and each have a galvanic connection to only one of the pins 8.
- three bores 24 are provided in these disks, which surround three of the pins extending through the filter block 7 at a distance.
- the diameter of the fourth hole is smaller than the holes 24 and essentially corresponds to the outer diameter of the pins 8.
- the contact point 25 of the pins 8 with the corresponding metallized disk 20, 21, 22 or 23 is located on this hole the disks 20, 21, 22 and 23 are each electrically connected to the lamellae 6 of the collar 5 and thus in contact with the wall 26 of the housing of the implantable electronic therapy device which carries the reference potential (ground potential).
- the corresponding contact point is designated 27.
- the collar Due to the arrangement of fins 6 at its free end, the collar has sufficient flexibility to absorb mechanical stresses which arise due to the development of heat when the connection between the housing wall 26 and the sleeve 2.1 of the lead-through body 2 is established, without the filter block being mechanically stressed becomes. Due to the relatively large distance of the filter block 7 suspended above the lead-through body 2 from the welding point 28, the heat development when the lead-through 1 is welded into the housing 26 of the implantable therapy device does not lead to such a thermal load on the individual filter elements of the filter block 7 that their electrical properties Change values irreversibly.
- the embodiment of the multipolar electrical feedthrough 1 shown in FIG. 5 differs from the embodiment shown in FIG. 4 essentially in the construction of the filter block 7.
- the filter block 7 from FIG. 5 has four electrically conductive disks 20.1, 21 .1, 22.1 and 23.1 formed by metallized substrate , which are connected in an electrically conductive manner to the lamellae 6 of the collar 5 at their peripheral edge.
- each of the disks 20, 21, 22 and 23 are connected to exactly one of the pins 8, but not to the lamellae 6 of the collar 5.
- the disks 20, 21, 22 and 23 and the disks 20.1, 21 .1, 22.1 and 23.1 are arranged opposite one another in pairs, namely the disk 20 of the disk 20.1, the disk 21 of the disk 21 .1, the disk 22 of the disk 22.1 and the disk 23 of the disk 23.1.
- One of the disks of the opposing disks of a respective disk pair is thus connected to one of the pins 8, while the other disk of a pair is galvanically connected to the collar 5.
- Each pair of disks 20, 20.1 and 21, 21 .1 and 22, 22.1 and 23, 23.1 forms a capacitor which is connected between exactly one of the pins 8 and the collar 5.
- the holes 24 in the disks 20, 20.1, 21, 21 .1, 22, 22.1, 23 and 23.1 are designed so that only exactly one hole 24 in the disks 20, 21, 22 and 23 is so tight that the respective one of the disks 20, 21, 22 and 23 contacts the corresponding pin 8, while all the other bores, in particular all the bores 24 in the disks 20.1, 21 .1, 22.1 and 23.1 have a larger diameter, so that these disks are spaced apart have the respective pin 8 and do not contact it electrically.
- Multipolar electrical feedthroughs are described in FIGS. 1 to 5.
- unipolar filter feedthroughs can also be implemented. These have, for example, only one pin of the type of pins 8, which is connected, for example, to a series of electrically conductive disks such as disks 20, 21, 22 and 23, while a second type of disks correspond to the electrically conductive disks 20.1, 21 .1 , 22.1 and 23.1 is electrically conductively connected to the collar 5 as previously described.
- the embodiment of the invention is not limited to the preferred exemplary embodiments specified above. Rather, a number of variants are possible which make use of the solution shown, even in the case of fundamentally different types.
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Electrotherapy Devices (AREA)
- Glass Compositions (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001539537A JP4301756B2 (ja) | 1999-11-20 | 2000-11-20 | フィルタブッシング |
AT00976051T ATE306294T1 (de) | 1999-11-20 | 2000-11-20 | Filterdurchführung |
EP00976051A EP1148910B1 (de) | 1999-11-20 | 2000-11-20 | Filterdurchführung |
US09/889,703 US6519133B1 (en) | 1999-11-20 | 2000-11-20 | Filter feedthrough |
DE50012920T DE50012920D1 (de) | 1999-11-20 | 2000-11-20 | Filterdurchführung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19957189.9 | 1999-11-20 | ||
DE19957189A DE19957189A1 (de) | 1999-11-20 | 1999-11-20 | Filterdurchführung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001037929A1 true WO2001037929A1 (de) | 2001-05-31 |
Family
ID=7930588
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/011518 WO2001037929A1 (de) | 1999-11-20 | 2000-11-20 | Filterdurchführung |
Country Status (6)
Country | Link |
---|---|
US (1) | US6519133B1 (de) |
EP (1) | EP1148910B1 (de) |
JP (1) | JP4301756B2 (de) |
AT (1) | ATE306294T1 (de) |
DE (2) | DE19957189A1 (de) |
WO (1) | WO2001037929A1 (de) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6999818B2 (en) * | 2003-05-23 | 2006-02-14 | Greatbatch-Sierra, Inc. | Inductor capacitor EMI filter for human implant applications |
US7260434B1 (en) * | 2004-09-23 | 2007-08-21 | Pacesetter, Inc. | Integrated 8-pole filtered feedthrough with backfill tube for implantable medical devices |
US7539004B2 (en) * | 2005-12-29 | 2009-05-26 | Medtronic, Inc. | Filtered feedthrough assembly and method of manufacture |
US8160707B2 (en) * | 2006-01-30 | 2012-04-17 | Medtronic, Inc. | Method and apparatus for minimizing EMI coupling in a feedthrough array having at least one unfiltered feedthrough |
US8326425B2 (en) * | 2006-03-30 | 2012-12-04 | Cardiac Pacemakers, Inc. | Feedthrough connector for implantable device |
US7803014B2 (en) * | 2006-03-30 | 2010-09-28 | Cardiac Pacemakers, Inc. | Implantable medical device assembly and manufacturing method |
US7281305B1 (en) * | 2006-03-31 | 2007-10-16 | Medtronic, Inc. | Method of attaching a capacitor to a feedthrough assembly of a medical device |
US7668597B2 (en) * | 2006-03-31 | 2010-02-23 | Medtronic, Inc. | Feedthrough array for use in implantable medical devices |
DE102006041940A1 (de) * | 2006-09-07 | 2008-03-27 | Biotronik Crm Patent Ag | Elektrische Durchführung |
DE102006054249A1 (de) | 2006-11-17 | 2008-05-21 | Biotronik Crm Patent Ag | Filterdurchführung für Implantate |
DE102008004308A1 (de) * | 2008-01-15 | 2009-07-16 | Biotronik Crm Patent Ag | Durchführung für eine Batterie, Verfahren zur Herstellung derselben und Batterie |
US8468664B2 (en) * | 2008-05-22 | 2013-06-25 | Greatbatch Ltd. | Process for manufacturing EMI filters utilizing counter-bored capacitors to facilitate solder re-flow |
EP2329860B1 (de) | 2009-12-03 | 2015-09-02 | Biotronik CRM Patent AG | Anschlussgehäuse und dessen Herstellung |
US8675339B2 (en) * | 2011-05-17 | 2014-03-18 | George M. Kauffman | Feedthrough capacitor |
US8593816B2 (en) | 2011-09-21 | 2013-11-26 | Medtronic, Inc. | Compact connector assembly for implantable medical device |
EP2814567B1 (de) * | 2012-02-15 | 2019-11-06 | Cardiac Pacemakers, Inc. | Hülse für eine implantierbare medizinische vorrichtung |
US11147978B2 (en) * | 2019-10-30 | 2021-10-19 | Wyss Center For Bio And Neuro Engineering | Feedthrough protective cover |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4152540A (en) | 1977-05-03 | 1979-05-01 | American Pacemaker Corporation | Feedthrough connector for implantable cardiac pacer |
EP0331959A2 (de) * | 1988-02-29 | 1989-09-13 | Pacesetter AB | Bipolarer gefilterter Durchführungsanschluss |
US5333095A (en) * | 1993-05-03 | 1994-07-26 | Maxwell Laboratories, Inc., Sierra Capacitor Filter Division | Feedthrough filter capacitor assembly for human implant |
EP0776016A2 (de) | 1995-11-27 | 1997-05-28 | Maxwell Laboratories, Inc. Sierra Capacitor/Filter Division | Zusammenbau von Durchführungskondensatoren |
US5650016A (en) | 1993-08-19 | 1997-07-22 | Jones; Josephine | Method of cleaning a surface |
US5650759A (en) * | 1995-11-09 | 1997-07-22 | Hittman Materials & Medical Components, Inc. | Filtered feedthrough assembly having a mounted chip capacitor for medical implantable devices and method of manufacture therefor |
DE19819797A1 (de) * | 1997-05-06 | 1998-12-24 | Medtronic Inc | Durchführungsbaugruppe für eine implantierbare medizinische Vorrichtung |
EP0916364A2 (de) * | 1997-11-13 | 1999-05-19 | Maxwell Energy Products, Inc. | Hermetisch abgeschlossener EMI-Durchführungsfilter für menschliches Implantat und andere Anwendungen. |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE897727C (de) * | 1943-09-18 | 1953-11-23 | Siemens Ag | Elektrischer Mehrfachdurchfuehrungskondensator |
US4853824A (en) * | 1987-06-05 | 1989-08-01 | Hitachi, Ltd. | Through-type capacitor |
DE3809009A1 (de) * | 1988-03-17 | 1989-09-28 | Schaltbau Gmbh | Anordnung aus einem steckverbinderteil, wie dose oder stecker, und einer filterarrayeinrichtung |
US5750926A (en) * | 1995-08-16 | 1998-05-12 | Alfred E. Mann Foundation For Scientific Research | Hermetically sealed electrical feedthrough for use with implantable electronic devices |
US5817130A (en) | 1996-05-03 | 1998-10-06 | Sulzer Intermedics Inc. | Implantable cardiac cardioverter/defibrillator with EMI suppression filter with independent ground connection |
US5825608A (en) * | 1996-10-18 | 1998-10-20 | Novacap, Inc. | Feed-through filter capacitor assembly |
US5896267A (en) * | 1997-07-10 | 1999-04-20 | Greatbatch-Hittman, Inc. | Substrate mounted filter for feedthrough devices |
US6275369B1 (en) * | 1997-11-13 | 2001-08-14 | Robert A. Stevenson | EMI filter feedthough terminal assembly having a capture flange to facilitate automated assembly |
US6424234B1 (en) * | 1998-09-18 | 2002-07-23 | Greatbatch-Sierra, Inc. | Electromagnetic interference (emi) filter and process for providing electromagnetic compatibility of an electronic device while in the presence of an electromagnetic emitter operating at the same frequency |
-
1999
- 1999-11-20 DE DE19957189A patent/DE19957189A1/de not_active Withdrawn
-
2000
- 2000-11-20 JP JP2001539537A patent/JP4301756B2/ja not_active Expired - Fee Related
- 2000-11-20 EP EP00976051A patent/EP1148910B1/de not_active Expired - Lifetime
- 2000-11-20 DE DE50012920T patent/DE50012920D1/de not_active Expired - Lifetime
- 2000-11-20 US US09/889,703 patent/US6519133B1/en not_active Expired - Lifetime
- 2000-11-20 AT AT00976051T patent/ATE306294T1/de not_active IP Right Cessation
- 2000-11-20 WO PCT/EP2000/011518 patent/WO2001037929A1/de active IP Right Grant
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4152540A (en) | 1977-05-03 | 1979-05-01 | American Pacemaker Corporation | Feedthrough connector for implantable cardiac pacer |
EP0331959A2 (de) * | 1988-02-29 | 1989-09-13 | Pacesetter AB | Bipolarer gefilterter Durchführungsanschluss |
US5333095A (en) * | 1993-05-03 | 1994-07-26 | Maxwell Laboratories, Inc., Sierra Capacitor Filter Division | Feedthrough filter capacitor assembly for human implant |
US5650016A (en) | 1993-08-19 | 1997-07-22 | Jones; Josephine | Method of cleaning a surface |
US5650759A (en) * | 1995-11-09 | 1997-07-22 | Hittman Materials & Medical Components, Inc. | Filtered feedthrough assembly having a mounted chip capacitor for medical implantable devices and method of manufacture therefor |
EP0776016A2 (de) | 1995-11-27 | 1997-05-28 | Maxwell Laboratories, Inc. Sierra Capacitor/Filter Division | Zusammenbau von Durchführungskondensatoren |
DE19819797A1 (de) * | 1997-05-06 | 1998-12-24 | Medtronic Inc | Durchführungsbaugruppe für eine implantierbare medizinische Vorrichtung |
EP0916364A2 (de) * | 1997-11-13 | 1999-05-19 | Maxwell Energy Products, Inc. | Hermetisch abgeschlossener EMI-Durchführungsfilter für menschliches Implantat und andere Anwendungen. |
Also Published As
Publication number | Publication date |
---|---|
EP1148910B1 (de) | 2005-10-12 |
US6519133B1 (en) | 2003-02-11 |
DE50012920D1 (de) | 2006-07-20 |
DE19957189A1 (de) | 2001-05-23 |
JP2003514636A (ja) | 2003-04-22 |
JP4301756B2 (ja) | 2009-07-22 |
EP1148910A1 (de) | 2001-10-31 |
ATE306294T1 (de) | 2005-10-15 |
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