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公开(公告)号：US20210251689A1
公开(公告)日：2021-08-19
申请号：US17251592
申请日：2019-06-12
Applicant: HOLOGIC, INC. , KANSAS STATE UNIVERSITY RESEARCH FOUNDATION
Inventor： Punit Prakash , Hojjatollah Fallahi , Jessica T. Schenck , Eric A. Frattura
IPC: A61B18/18 , A61B5/0507 , A61B5/00
Abstract: A tissue ablation system includes an antenna, a microwave energy source, measurement apparatus including a signal generator and a detector, a controller, and a switch assembly arranged to alternatively electrically couple the antenna to the microwave energy source or to the measurement apparatus, wherein the controller is configured to cause the switch assembly to alternate between assessment mode and ablation mode, and wherein the controller is configured to control the delivery of ablative microwave energy during an ablation mode based at least in part on a difference between a then-current broadband reflection coefficient spectrum and a previously measured broadband reflection coefficient spectrum obtained by delivery of a spectrum of individual non-ablative microwave signals and detecting the reflection of same during respective assessment modes.
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公开(公告)号：US20170265940A1
公开(公告)日：2017-09-21
申请号：US15532449
申请日：2015-12-01
Applicant: Kansas State University Research Foundation
Inventor： Punit Prakash , Brogan McWilliams , Emily Frederick
CPC classification number: A61B18/1815 , A61B17/00234 , A61B2017/00318 , A61B2018/00023 , A61B2018/00488 , A61B2018/00494 , A61B2018/005 , A61B2018/00511 , A61B2018/00517 , A61B2018/00541 , A61B2018/00577 , A61B2018/00809 , A61B2018/00904 , A61B2018/00982 , A61B2018/1838 , A61B2018/1846 , A61B2018/1853 , A61B2018/1861 , A61B2018/1869
Abstract: An electrosurgical device (10) operable to deliver microwave energy to cause targeted tissue ablation is provided. The electrosurgical device (10) comprises an antenna (26), a reflector (30), and a dielectric material (34) disposed therebetween. The selection of the dielectric material (30) and the relative positioning of the antenna (26) and the reflector (30) provide impedance matching between the antenna (26) and a transmission line (12) so as to minimize heating along the length of the device (10) during use.
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公开(公告)号：US12023093B2
公开(公告)日：2024-07-02
申请号：US16478841
申请日：2018-01-26
Inventor： Austin Pfannenstiel , Thomas M Keast , Henky Wibowo , Punit Prakash
CPC classification number: A61B18/1815 , A61B1/018 , A61B1/2676 , A61B2018/00023 , A61B2018/00541 , A61B2018/00577 , A61B2018/00642 , A61B2018/00785 , A61B2018/00791 , A61B2018/00982 , A61B2018/1823 , A61B2018/1838 , A61B2018/1853 , A61B2018/1861
Abstract: A novel microwave ablation applicator includes a flexible tubular shaft and a partially encapsulated antenna. The applicator is adapted to be used with an endoscope in order to access remote targets deep within an organ of a patient. Microwave power is emitted from the antenna in a desired radiation pattern by circulating an attenuating liquid through the shaft and across a portion of the antenna. Microwave ablation systems and methods are described.
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公开(公告)号：US20200367966A1
公开(公告)日：2020-11-26
申请号：US16881780
申请日：2020-05-22
Inventor： Austin Pfannenstiel , Hojjatollah Fallahi , Punit Prakash
IPC: A61B18/18
Abstract: An electrosurgical device (10) is provided that is operable to deliver microwave energy within a controlled angular expanse to cause targeted tissue ablation. The device (10) comprises a blocking or reflecting material such as cylindrical members (34) that are laterally spaced from the antenna (20) that is operable to emit the microwave energy. The reflecting material creates regions in and/or surrounding the device into which sensors (51), such as thermocouple wires, may be placed to monitor a condition associated with the device or the patient's body.
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公开(公告)号：US12133679B2
公开(公告)日：2024-11-05
申请号：US17862787
申请日：2022-07-12
Applicant: Kansas State University Research Foundation
Inventor： Punit Prakash , Brogan McWilliams , Emily Frederick
Abstract: An electrosurgical device (10) operable to deliver microwave energy to cause targeted tissue ablation is provided. The electrosurgical device (10) comprises an antenna (26), a reflector (30), and a dielectric material (34) disposed therebetween. The selection of the dielectric material (30) and the relative positioning of the antenna (26) and the reflector (30) provide impedance matching between the antenna (26) and a transmission line (12) so as to minimize heating along the length of the device (10) during use.
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Patent Agency Ranking
公开(公告)号：US20240277407A1
公开(公告)日：2024-08-22
申请号：US18044012
申请日：2021-09-03
Inventor： Jan Sebek , Punit Prakash , Henky Wibowo
CPC classification number: A61B18/1815 , A61B34/20 , A61B90/37 , A61B90/39 , A61B2018/00023 , A61B2018/00083 , A61B2018/00178 , A61B2018/00577 , A61B2018/00702 , A61B2018/00791 , A61B2018/00886 , A61B2018/1823 , A61B2018/1838 , A61B2018/1846 , A61B2018/1853 , A61B2018/1861 , A61B2090/376 , A61B2090/3966
Abstract: Catheter-based applicators incorporating a microwave ablation antenna are provided. The applicator can be flexible and suitable for delivering ablation to target tissues via endoscopic approaches as well as intracavitary/intraluminal approaches. The applicators are configured to create large volume thermal ablation zones with minimal radiation losses along the applicator axis traveling proximal to the ablation zone. This effect is accomplished by employing a backward-facing choke element and/or a multi-slotted antenna having a plurality of spaced-apart conducting elements encircling the antenna.
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公开(公告)号：US20200054396A1
公开(公告)日：2020-02-20
申请号：US16478841
申请日：2018-01-26
Inventor： Austin Pfannenstiel , Thomas M Keast , Henky Wibowo , Punit Prakash
IPC: A61B18/18
Abstract: A novel microwave ablation applicator includes a flexible tubular shaft and a partially encapsulated antenna. The applicator is adapted to be used with an endoscope in order to access remote targets deep within an organ of a patient. Microwave power is emitted from the antenna in a desired radiation pattern by circulating an attenuating liquid through the shaft and across a portion of the antenna. Microwave ablation systems and methods are described.
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公开(公告)号：US11751943B2
公开(公告)日：2023-09-12
申请号：US16477490
申请日：2018-01-26
Applicant: Kansas State University Research Foundation
Inventor： Punit Prakash , Austin Pfannenstiel
CPC classification number: A61B18/1815 , A61B1/018 , A61B1/2676 , A61B2018/00023 , A61B2018/00541 , A61B2018/00577 , A61B2018/00642 , A61B2018/00785 , A61B2018/00791 , A61B2018/00982 , A61B2018/1823 , A61B2018/1838 , A61B2018/1853 , A61B2018/1861
Abstract: A novel monitoring method evaluates tissue ablation progress. An antenna in a distal portion of an ablation applicator sends and receives electrical information from the target tissue during ablation. The information is used to determine ablation progress. A related ablation monitoring system includes a power monitor and processor operable to evaluate ablation progress based on reflected electrical properties during the ablation. The invention has particular benefits when used in endoscopic-based microwave ablation.
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公开(公告)号：US20210393328A1
公开(公告)日：2021-12-23
申请号：US17465169
申请日：2021-09-02
Inventor： Austin Pfannenstiel , Hojjatollah Fallahi , Punit Prakash
IPC: A61B18/18
Abstract: An electrosurgical device (10) is provided that is operable to deliver microwave energy within a controlled angular expanse to cause targeted tissue ablation. The device (10) comprises a blocking or reflecting material such as cylindrical members (34) that are laterally spaced from the antenna (20) that is operable to emit the microwave energy. The reflecting material creates regions in and/or surrounding the device into which sensors (51), such as thermocouple wires, may be placed to monitor a condition associated with the device or the patient's body.
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公开(公告)号：US20210298827A1
公开(公告)日：2021-09-30
申请号：US16477490
申请日：2018-01-26
Applicant: Kansas State University Research Foundation
Inventor： Punit Prakash , Austin Pfannenstiel
Abstract: A novel monitoring method evaluates tissue ablation progress. An antenna in a distal portion of an ablation applicator sends and receives electrical information from the target tissue during ablation. The information is used to determine ablation progress. A related ablation monitoring system includes a power monitor and processor operable to evaluate ablation progress based on reflected electrical properties during the ablation. The invention has particular benefits when used in endoscopic-based microwave ablation.
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