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WO2025141650A1 - Dispositif médical à capteur - Google Patents

Dispositif médical à capteur Download PDF

Info

Publication number
WO2025141650A1
WO2025141650A1 PCT/JP2023/046450 JP2023046450W WO2025141650A1 WO 2025141650 A1 WO2025141650 A1 WO 2025141650A1 JP 2023046450 W JP2023046450 W JP 2023046450W WO 2025141650 A1 WO2025141650 A1 WO 2025141650A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
sensor
medical device
insulator
connector
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.)
Pending
Application number
PCT/JP2023/046450
Other languages
English (en)
Japanese (ja)
Inventor
聡志 浪間
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Intecc Co Ltd
Original Assignee
Asahi Intecc Co Ltd
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 Asahi Intecc Co Ltd filed Critical Asahi Intecc Co Ltd
Priority to PCT/JP2023/046450 priority Critical patent/WO2025141650A1/fr
Publication of WO2025141650A1 publication Critical patent/WO2025141650A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
    • A61B5/053—Measuring electrical impedance or conductance of a portion of the body
    • A61B5/0538—Measuring electrical impedance or conductance of a portion of the body invasively, e.g. using a catheter

Definitions

  • This disclosure relates to a medical device with a sensor.
  • Patent Documents 1 and 2 disclose devices having a sensor and a connector in which conductive and insulating parts are arranged alternately.
  • Patent Document 3 discloses a multi-lumen catheter in which a thermocouple is inserted as a temperature sensor into the fourth lumen.
  • the insulating part will also be referred to as the "insulator.”
  • This disclosure has been made to solve at least some of the problems described above, and aims to prevent damage to the insulator in a medical device with a sensor.
  • the third part 117 is a part provided between the second part 116 and the fourth part 118.
  • the outer diameter of the tip of the third part 117 is the same as the outer diameter of the base end of the second part 116.
  • the outside diameter of the base end of the third portion 117 is the same as the outside diameter of the tip of the fourth portion 118.
  • the third portion 117 has a tapered shape in which the outside diameter gradually decreases from the base end to the tip.
  • the gradient of the taper of the third portion 117 is greater than the gradient of the taper of the second portion 116.
  • the second portion 116 is a tapered portion.
  • the third portion 117 is a tapered portion.
  • the fourth portion 118 is the portion of the first core shaft 11 that is provided on the most base end side.
  • the fourth portion 118 is the portion of the first core shaft 11 that has the largest outside diameter, and is a substantially cylindrical shape with a substantially constant outside diameter.
  • the outside diameters, lengths in the direction of the axis O, and cross-sectional shapes of the first portion 115, the second portion 116, the third portion 117, and the fourth portion 118 can be determined arbitrarily.
  • the first coil 60 and the second coil 70 may be a single-strand coil formed by winding a single strand of wire.
  • the first coil 60 and the second coil 70 may be a single-strand stranded coil formed by winding a strand of wire made by twisting multiple strands of wire together.
  • the first coil 60 and the second coil 70 may be a multi-strand stranded coil formed by using multiple strands of wire made by twisting multiple strands of wire together and winding each strand of wire into multiple strands.
  • the first coil 60 and the second coil 70 may be the same type of coil or different types of coils.
  • the outer diameter and inner diameter of the first coil 60 and the second coil 70 can be determined arbitrarily.
  • FIG. 4 is an explanatory diagram showing the configuration of the sensor sheet 24.
  • the sensor sheet 24 is a sheet-like member.
  • the sensor sheet 24 has a sensor array 24s, a microchip 24m, a wide portion 24a, a narrow portion 24b, and sensor wiring 24c.
  • the direction in which the conductors 301a-301e and the inner coverings 302a-302e of the wiring 30 are arranged is also called the "width direction”.
  • the direction in which the wiring 30 is perpendicular to the length and width directions is also called the "thickness direction”.
  • the wiring 30 has a length T30 in the thickness direction that is smaller than the length W30 in the width direction.
  • the wiring 30 has a flat cross-sectional shape in which the thickness direction is smaller than the width direction.
  • the cross-section of the wiring 30 is non-circular.
  • the pair of principal surfaces of the side surfaces of the wiring 30 that have a relatively large area one is also called the "first principal surface MF1" and the other is also called the "second principal surface MF2".
  • the first principal surface MF1 and the second principal surface MF2 face each other.
  • the wiring 30 is loosely wound around the fourth portion 118 of the first core shaft 11.
  • the distance between adjacent wirings 30 gradually increases from the tip side to the base end side.
  • the distance between adjacent wirings 30 decreases as the wirings 30 approach the second roll section 33.
  • the wiring 30 extends linearly along the outer circumferential surface of the first core shaft 11 and the outer circumferential surface of the second core shaft 12. In other words, the wiring 30 is not spiral in the second section P2.
  • the second section P2 is a section that is on the base end side of the second joint 52 and up to the inside of the connector 40.
  • the wiring 30 in the second section P2 has a straight portion 35 and a base end portion 36. In the straight portion 35, the wiring 30 extends linearly along the fourth portion 118 of the first core shaft 11 and the fifth portion 125 of the second core shaft 12. In the gap 13, the wiring 30 also extends along the longitudinal direction of the sensor-equipped medical device 1. In the base end portion 36, the wiring 30 is inserted inside the connector 40 and is electrically connected to the connector 40.
  • the tip surface of the second tube 41b is inclined with respect to the X-axis direction. Therefore, in a cross section including the first insulator 43a, the second tube 41b has a circular shape with a portion of the circumference cut out.
  • the cutout portion of the second tube 41b is filled with a first insulator 43a.
  • the first insulator 43a filled in the cutout portion of the second tube 41b is exposed to the outside.
  • the first insulator 43a is disposed between the double ellipsoidal surface 412a and the double ellipsoidal surface 411b.
  • the first tube 41a is joined to the first insulator 43a at the double ellipsoidal surface 412a.
  • the second tube 41b is joined to the first insulator 43a at the double ellipsoidal surface 411b.
  • the double ellipsoidal surface 412a and the double ellipsoidal surface 411b are parallel. Therefore, the joint surface between the first tube 41a and the first insulator 43a is parallel to the joint surface between the second tube 41b and the first insulator 43a.
  • the shape of the exposed portion of the first insulator 43a as viewed from the first radial direction D1 is approximately C-shaped.
  • the shape of the exposed portion of the first insulator 43a as viewed from a certain radial direction is a two-dimensional shape obtained by projecting the outline of the portion of the exposed portion of the first insulator 43a that is visible from the radial direction onto a plane perpendicular to the radial direction.
  • the shape of the exposed portion of the first insulator 43a as viewed from the second radial direction D2 is a parallelogram.
  • the shape of the exposed portion of the first insulator 43a as viewed from the first radial direction D1 is different from the shape of the exposed portion of the first insulator 43a as viewed from the second radial direction D2.
  • the shapes of the exposed portion of the first insulator 43a as viewed from the first radial direction D1 and the second radial direction D2 as illustrated in FIG. 10 are illustrated.
  • the shapes of the exposed portion of the first insulator 43a as viewed from different radial directions are not limited to the first and second radial directions D1 and D2 as illustrated in FIG. 10, but are different from each other.
  • the first tube 41a and the second tube 41b joined by the first insulator 43a have been described.
  • the second tube 41b and the third tube 41c joined by the second insulator 43b have the same configuration.
  • the third tube 41c and the fourth tube 41d joined by the third insulator 43c have the same configuration.
  • the fourth tube 41d and the fifth tube 41e joined by the fourth insulator 43d have the same configuration.
  • the fifth tube 41e and the sixth tube 41f joined by the fifth insulator 43e have the same configuration, except that the wiring 30 is not arranged inside the sixth tube 41f and the sixth part 126 of the second core shaft 12 is arranged therein.
  • the sixth part 126 and the seventh part 127 of the second core shaft 12 are not covered by the second insulating tube 16. Therefore, inside the sixth tube 41f, the sixth tube 41f and the second core shaft 12 are electrically connected by a conductor arranged inside the sixth tube 41f.
  • the shape of the exposed portion of the second insulator 43b as viewed from the first radial direction D1 is different from the shape of the exposed portion of the second insulator 43b as viewed from the second radial direction D2.
  • the shape of the exposed portion of the third insulator 43c as viewed from the first radial direction D1 is different from the shape of the exposed portion of the third insulator 43c as viewed from the second radial direction D2.
  • the shape of the exposed portion of the fourth insulator 43d as viewed from the first radial direction D1 is different from the shape of the exposed portion of the fourth insulator 43d as viewed from the second radial direction D2.
  • the shape of the exposed portion of the fifth insulator 43e as viewed from the first radial direction D1 is different from the shape of the exposed portion of the fifth insulator 43e as viewed from the second radial direction D2. As shown in FIG. 8, the shapes of the exposed portions as viewed from the first radial direction D1 are all the same for the first insulator 43a to the fifth insulator 43e. The shapes of the exposed portions as viewed from the second radial direction D2 are all the same for the first insulator 43a to the fifth insulator 43e.
  • the resin insulators 43a to 43e have lower rigidity than the metal tubes 41a to 41f. Therefore, when connecting the connector 40 to the external device, bending stress is likely to act on the insulators 43a to 43e, which have a relatively low rigidity.
  • the shape of the exposed part of the insulators 43a to 43e when viewed from the first radial direction D1 is different from the shape of the exposed part when viewed from the second radial direction D2 different from the first radial direction D1.
  • the insulators 43a to 43e are not in a right cylindrical shape. Therefore, even if bending acts near the insulators 43a to 43e when connecting the connector 40 to the external device, stress is less likely to concentrate on the insulators 43a to 43e. As a result, the medical device with sensor 1 can prevent damage to the insulators 43a to 43e.
  • the insulators 43a-43e are formed from an insulating adhesive, so the connector 40 including the first tube 41a, the second tube 41b, and the first insulator 43a can be easily manufactured.
  • the medical device with sensor 1 in the first embodiment is provided with a second core shaft 12 that penetrates the insulators 43a-43e. This improves the strength of the portion of the connector 40 where the insulators 43a-43e are located. As a result, damage to the insulators 43a-43e can be further suppressed, improving the safety of the procedure.
  • the base end 41ap of the first tube 41a is located closer to the base end than the tip 41bd of the second tube 41b. This allows stress to be distributed more evenly to the first insulator 43a, and damage to the first insulator 43a is more effectively suppressed.
  • the imaginary cylindrical surface VC obtained by extending the outer circumferential surface of the first tube 41a toward the base end substantially coincides with the outer circumferential surface of the second tube 41b. This allows the first tube 41a and the second tube 41b to have the appearance of a single tube.
  • At least one of the double ellipsoidal surface 412a of the first tube 41a and the double ellipsoidal surface 411b of the second tube 41b includes a portion that is inclined with respect to the longitudinal axis direction of the medical device with sensor 1. Therefore, even if bending occurs near the first insulator 43a when connecting the connector 40 to an external device, stress on the first insulator 43a is distributed more evenly, and damage to the first insulator 43a is more effectively suppressed. The same applies to the insulators 43b to 43e.
  • At least a portion of the joint surface between the first tube 41a and the first insulator 43a is approximately parallel to at least a portion of the joint surface between the second tube 41b and the first insulator 43a. Therefore, in the longitudinal direction of the medical device with sensor 1, there is no portion that is composed only of the first tube 41a. In other words, in the cross section of any portion along the longitudinal direction of the medical device with sensor 1, the metal tubes 41a, 41b are included in at least a portion. Therefore, stress on the first insulator 43a is distributed more evenly, and damage to the first insulator 43a is more effectively suppressed. The same applies to the insulators 43b to 43e.
  • At least one of the first tube 41a and the second tube 41b is joined to the first insulator 43a at the inner circumferential surfaces 41ai, 41bi. This improves the joining strength between the first tube 41a and the second tube 41b and the first insulator 43a, providing a connector 40 that is less likely to break.
  • Second Embodiment 16 is an external view of a connector 40A of the second embodiment as viewed from a second radial direction D2.
  • the sensor-equipped medical device 1A of the second embodiment includes a connector 40A instead of the connector 40 in the configuration described in the first embodiment.
  • the connector 40A includes a second tube 41bA instead of the second tube 41b and a first insulator 43aA instead of the first insulator 43a in the configuration described in the first embodiment.
  • the second tube 41bA has a double ellipsoid 411bA at the tip located on the first tube 41a side.
  • the first portion PA1 of the double ellipsoid 411bA is inclined with respect to the long axis direction of the sensor-equipped medical device 1A.
  • the second portion PA2 of the double ellipsoid 411bA is perpendicular to the long axis direction of the sensor-equipped medical device 1A and is not inclined. Therefore, the double ellipsoid 412a and the double ellipsoid 411bA are parallel in the first portion PA1 of the double ellipsoid 411bA.
  • the double ellipsoid 412a and the double ellipsoid 411bA are not parallel in the second portion PA2 of the double ellipsoid 411bA.
  • the first insulator 43aA is disposed between the double ellipsoid 412a and the double ellipsoid 411bA, and joins the first tube 41a and the second tube 41bA.

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

Abstract

L'invention concerne un dispositif médical à capteur qui comprend : un capteur ; un câblage qui est connecté électriquement au capteur ; un premier tube conducteur qui est positionné plus proche du côté d'extrémité de base que le capteur et qui est connecté électriquement au câblage ; un second tube conducteur qui est positionné plus proche du côté d'extrémité de base que le premier tube et qui est connecté électriquement au câblage ; et un isolant qui est intercalé entre le premier tube et le second tube et exposé en partie à l'extérieur, la forme de la partie exposée vue depuis une première direction radiale étant différente de la forme de la partie exposée vue depuis une seconde direction radiale différente de la première direction radiale.
PCT/JP2023/046450 2023-12-25 2023-12-25 Dispositif médical à capteur Pending WO2025141650A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2023/046450 WO2025141650A1 (fr) 2023-12-25 2023-12-25 Dispositif médical à capteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2023/046450 WO2025141650A1 (fr) 2023-12-25 2023-12-25 Dispositif médical à capteur

Publications (1)

Publication Number Publication Date
WO2025141650A1 true WO2025141650A1 (fr) 2025-07-03

Family

ID=96217044

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/046450 Pending WO2025141650A1 (fr) 2023-12-25 2023-12-25 Dispositif médical à capteur

Country Status (1)

Country Link
WO (1) WO2025141650A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09135905A (ja) * 1995-11-17 1997-05-27 Tokai Rika Co Ltd 体内挿入式医療器具用のセンサ及びその製造方法
US5755760A (en) * 1996-03-11 1998-05-26 Medtronic, Inc. Deflectable catheter
WO2003090234A1 (fr) * 2002-04-19 2003-10-30 Eidgenoessische Technische Hochschule Zuerich Conducteurs electriques proteges et solides et tubes a conducteurs electriques proteges et solides intergres
WO2006031541A1 (fr) * 2004-09-09 2006-03-23 Vnus Medical Technologies, Inc. Procedes et dispositif pour traiter des structures anatomiques creuses
WO2007091633A1 (fr) * 2006-02-09 2007-08-16 The University Of Tokushima BIODISPOSITIF, structure de pièce de contact de biodispositif, ET biodétecteur
US20160351292A1 (en) * 2015-06-01 2016-12-01 Autonomix Medical, Inc. Elongated Conductors and Methods of Making and Using the Same
US20180000541A1 (en) * 2015-01-07 2018-01-04 St. Jude Medical, Cardiology Division, Inc. Ablation catheter with electrodes

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09135905A (ja) * 1995-11-17 1997-05-27 Tokai Rika Co Ltd 体内挿入式医療器具用のセンサ及びその製造方法
US5755760A (en) * 1996-03-11 1998-05-26 Medtronic, Inc. Deflectable catheter
WO2003090234A1 (fr) * 2002-04-19 2003-10-30 Eidgenoessische Technische Hochschule Zuerich Conducteurs electriques proteges et solides et tubes a conducteurs electriques proteges et solides intergres
WO2006031541A1 (fr) * 2004-09-09 2006-03-23 Vnus Medical Technologies, Inc. Procedes et dispositif pour traiter des structures anatomiques creuses
WO2007091633A1 (fr) * 2006-02-09 2007-08-16 The University Of Tokushima BIODISPOSITIF, structure de pièce de contact de biodispositif, ET biodétecteur
US20180000541A1 (en) * 2015-01-07 2018-01-04 St. Jude Medical, Cardiology Division, Inc. Ablation catheter with electrodes
US20160351292A1 (en) * 2015-06-01 2016-12-01 Autonomix Medical, Inc. Elongated Conductors and Methods of Making and Using the Same

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