Source: http://www.google.com/patents/US20020058937?dq=5,832,511
Timestamp: 2016-02-08 06:55:08
Document Index: 262674775

Matched Legal Cases: ['art 13', 'art 13', 'art 13', 'art 13', 'art 13', 'art 13']

Patent US20020058937 - Electrode needle with radiofrequency active filament - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatents1. Electrode needle for the treatment of parenchymatous tumours throughs radiofrequency-induced interstitial hyperthermy, comprising a hollow guide needle (11) and a radiofrequency active filament (12) threaded into the needle, connectable to a radiofrequency generator and capable of axial movements...http://www.google.com/patents/US20020058937?utm_source=gb-gplus-sharePatent US20020058937 - Electrode needle with radiofrequency active filamentAdvanced Patent SearchPublication numberUS20020058937 A1Publication typeApplicationApplication numberUS 10/010,686Publication dateMay 16, 2002Filing dateNov 8, 2001Priority dateNov 10, 2000Also published asCA2361777A1, CA2361777C, CN1222251C, CN1364443A, DE60113783D1, DE60113783T2, EP1205213A2, EP1205213A3, EP1205213B1, US6652519Publication number010686, 10010686, US 2002/0058937 A1, US 2002/058937 A1, US 20020058937 A1, US 20020058937A1, US 2002058937 A1, US 2002058937A1, US-A1-20020058937, US-A1-2002058937, US2002/0058937A1, US2002/058937A1, US20020058937 A1, US20020058937A1, US2002058937 A1, US2002058937A1InventorsMichele MalteseOriginal AssigneeMichele MalteseExport CitationBiBTeX, EndNote, RefManPatent Citations (7), Referenced by (2), Classifications (18), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetElectrode needle with radiofrequency active filament
[0008] Further details of the finding will appear more clearly from the following description, made with reference to the attached indicative and nonlimiting drawings. In such drawings: [0009] [0009]FIG. 1 shows separate needle and active filament according to a first embodiment; [0010] [0010]FIG. 2 shows a longitudinal section of the needle of FIG. 1 with the filament threaded in a retracted position; [0011] [0011]FIG. 3 shows the needle with the filament in forward position for use; [0012] [0012]FIG. 4 shows a longitudinal section of the electrical connection means to use the electrode needle of the previous Figures; [0013] [0013]FIG. 5 shows a needle with a threaded filament in a second embodiment and with open connector; and [0014] [0014]FIG. 6 shows a perspective view of a detail of the handling means of the filament threaded in the needle of the previous Figure.
[0015] In such drawings, reference numeral 11 indicates a guide needle intended to be introduced into the body of a patient, and reference numeral 12 indicates a radiofrequency active filament, sized to be threaded and to slide into needle 11. The filament is rectilinear except for a distal terminal part 13 shaped as a helix or a spiral, for example through a thermoforming process. Such terminal part 13 can be in axis with respect to the main longitudinal direction of the needle, or angular, for example up to 90�. [0016] For the constructional purposes, the needle has an external insulating coating 11′ for its entire length, except for a part at the distal end 11″. According to a first embodiment shown in FIGS. 1-4, the proximal end of the radiofrequency filament 12 protrudes from the needle and is buried into a union 14, for example through a resin casting, which in any case is exposed for the contact with a filament electrical connection connector 15 to a radiofrequency generator, not shown. [0017] Once it has been threaded into the guide needle, or keeping it still, the filament can be made to slide forward and backward through union 14, between an inactive position in which it is completely retracted into the needle, and an active position in which the terminal part 13 protrudes from the distal end of the needle. [0018] In a second embodiment shown in FIGS. 5 and 6, the proximal end of the guide needle 11 is introduced into a connector 16 wherein there is housed a small shaft 17 capable of rotating around a perpendicular axis with respect to the needle through a hand grip 18. [0019] The proximal end of the active filament 12 is engaged with said shaft 17 so that, when the hand grip 18 is rotated in clockwise or counter clockwise direction, the terminal part 13 of the filament respectively protrudes from or withdraws into, the needle. In this case, the electrical power supply cable 19 is directly inserted into connector 16 and is connected to the distal end of the guide needle 11. [0020] To have an indication of the position of the active filament 12 with respect to the guide needle 11, once it has been introduced into the patient's body, the hand grip 18 can be associated to a pointer 20 angularly movable between at least two reference points provided on the connector. For its angular movements, said pointer can exhibit, for example, a pin interacting with a spiral structure obtained on the inner side of the hand grip 18. [0021] Irrespective of the embodiment, moreover, a thermocouple—not shown—can be applied on the distal part of the guide needle 11 for measuring the body temperature. [0022] In practice, when the needle is introduced into the patient's body, the filament is held in inactive retracted position, and its terminal part 13 remains substantially rectilinear, contained into the needle recess, as shown in FIG. 2. When the tumoral mass to be irradiated has been reached, the terminal part 13 is pushed outside by the needle, it winds up as a spiral or helix, as shown in FIGS. 3 and 4, thus affecting a wide irradiation area. [0023] Once the treatment has finished, the terminal part of the filament is withdrawn into the needle. [0024] It must be noted that the effectiveness of the electrode needle can be further improved using more active filaments threaded into the same guide needle and configured as described above. [0025] Finally, it must be noted that the electrode needle being examined can also be used in combination with other electromagnetic wave generators, for example microwave generators. Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS5472441 *Mar 11, 1994Dec 5, 1995Zomed InternationalDevice for treating cancer and non-malignant tumors and methodsUS5507743 *Aug 16, 1994Apr 16, 1996Zomed InternationalCoiled RF electrode treatment apparatusUS5611799 *Dec 4, 1995Mar 18, 1997Smith; Albert C.Ocular repair methodUS6228109 *Sep 7, 1999May 8, 2001Lily Chen TuMethods for treating atherosclerosis and vulnerable plaquesUS6231573 *May 29, 1998May 15, 2001Medicorp, S.A.Device for treating aneurysmsUS6258086 *Mar 19, 1999Jul 10, 2001Oratec Interventions, Inc.Catheter for delivery of energy to a surgical siteUS6280441 *Dec 15, 1997Aug 28, 2001Sherwood Services AgApparatus and method for RF lesioning* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS8374669Nov 30, 2006Feb 12, 2013Ambu A/SNeedle electrode with displaceable cover and method of using said needle electrodeUS20110301594 *Nov 3, 2009Dec 8, 2011Itzhak OrionMethod and apparatus for thrombus dissolution/thrombectomy by an electrode catheter device* Cited by examinerClassifications U.S. Classification606/41, 607/113, 607/99International ClassificationA61N1/06, A61B18/14, A61B18/18, A61N1/40Cooperative ClassificationA61B2018/144, A61N1/06, A61B2018/1435, A61B18/1815, A61B2018/00577, A61B18/1477, A61B18/18European ClassificationA61B18/18M, A61B18/14N, A61B18/18, A61N1/06Legal EventsDateCodeEventDescriptionNov 8, 2001ASAssignmentJul 22, 2005ASAssignmentOwner name: INVATEC S.R.L., ITALYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:THERMO-MED 2000 KFT;REEL/FRAME:016793/0386Effective date: 20050510May 23, 2007FPAYFee paymentYear of fee payment: 4Feb 17, 2010ASAssignmentOwner name: MEDTRONIC, INC.,MINNESOTAFree format text: SECURITY AGREEMENT;ASSIGNOR:INVATEC, S.P.A.;REEL/FRAME:023937/0758Effective date: 20100106Owner name: MEDTRONIC, INC., MINNESOTAFree format text: SECURITY AGREEMENT;ASSIGNOR:INVATEC, S.P.A.;REEL/FRAME:023937/0758Effective date: 20100106Mar 23, 2011FPAYFee paymentYear of fee payment: 8May 25, 2015FPAYFee paymentYear of fee payment: 12RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services