WO2022181361A1 - 画像診断用カテーテル - Google Patents

画像診断用カテーテル Download PDF

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Publication number
WO2022181361A1
WO2022181361A1 PCT/JP2022/005434 JP2022005434W WO2022181361A1 WO 2022181361 A1 WO2022181361 A1 WO 2022181361A1 JP 2022005434 W JP2022005434 W JP 2022005434W WO 2022181361 A1 WO2022181361 A1 WO 2022181361A1
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WO
WIPO (PCT)
Prior art keywords
tube
spacer
outer tube
support tube
peripheral surface
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.)
Ceased
Application number
PCT/JP2022/005434
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
智弘 福田
総一郎 杉原
陽一 伊藤
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.)
Terumo Corp
Original Assignee
Terumo Corp
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 Terumo Corp filed Critical Terumo Corp
Priority to CN202280016709.3A priority Critical patent/CN116981408A/zh
Priority to JP2023502281A priority patent/JP7776487B2/ja
Publication of WO2022181361A1 publication Critical patent/WO2022181361A1/ja
Priority to US18/454,146 priority patent/US20230389894A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
    • A61B8/4444—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to the probe
    • A61B8/445—Details of catheter construction
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0033—Features or image-related aspects of imaging apparatus, e.g. for MRI, optical tomography or impedance tomography apparatus; Arrangements of imaging apparatus in a room
    • A61B5/0035—Features or image-related aspects of imaging apparatus, e.g. for MRI, optical tomography or impedance tomography apparatus; Arrangements of imaging apparatus in a room adapted for acquisition of images from more than one imaging mode, e.g. combining MRI and optical tomography
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0062—Arrangements for scanning
    • A61B5/0066—Optical coherence imaging
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
    • A61B5/6852—Catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/12—Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/52—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/5215—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of medical diagnostic data
    • A61B8/5238—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of medical diagnostic data for combining image data of patient, e.g. merging several images from different acquisition modes into one image

Definitions

  • the present disclosure relates to diagnostic imaging catheters.
  • a diagnostic imaging catheter generally has a pull-back mechanism at its proximal end that changes the relative position between the sheath and the drive shaft in order to continuously observe cross-sections within the body cavity (see, for example, Patent Document 1).
  • the pullback mechanism includes an outer tube, a support tube provided radially inward of the outer tube and radially outward of the drive shaft, a spacer that integrally connects the outer tube and the support tube, and a an inner tube disposed radially inwardly and radially outwardly of the support tube and axially movable relative to the outer tube and the support tube.
  • priming is performed to fill the lumen with liquid. Priming is usually performed with the inner tube drawn out from the outer tube.
  • the flow path between the outer tube and the support tube is blocked by a spacer, and support is provided near the blocked portion through a notch such as a hole or slit provided in the support tube. It has a structure that communicates with the inside of the tube. Therefore, there is a problem that the flow path resistance in the pullback mechanism is large, and the air in the pullback mechanism is difficult to escape.
  • an object of the present disclosure is to provide a diagnostic imaging catheter that can achieve good priming in the pullback mechanism.
  • a diagnostic imaging catheter as a first aspect of the present disclosure includes an outer tube, a support tube provided radially inward of the outer tube, a spacer integrally connecting the outer tube and the support tube, an inner tube that is provided radially inside the outer tube and radially outside the support tube and is axially movable relative to the outer tube and the support tube;
  • the spacer forms a communication passage that connects the flow path between the pipe and the support tube to the interior of the support tube.
  • the diagnostic imaging catheter has a connector joined to the outer tube, the spacer joined to the support tube, the spacer axially connecting the outer tube and the connector. It has a retaining part located between.
  • the communication path is defined by the spacer, the outer tube and the connector.
  • the spacer includes a spacer main body located between the outer peripheral surface of the support tube and the inner peripheral surface of the outer tube, and a distance from the distal end of the spacer main body to the distal end surface of the outer tube. and a projecting portion projecting toward the distal end on the distal end side.
  • the spacer main body has a tubular shape, and the outer peripheral surface of the spacer main body has flat surfaces extending along the axial direction at two locations spaced apart from each other in a first direction along the radial direction. form.
  • FIG. 2 is a plan view showing a state in which an external device is connected to the diagnostic imaging catheter as the first embodiment; 2 is a side view showing the diagnostic imaging catheter shown in FIG. 1 in a state before a pullback operation; FIG. 2 is a side view showing the diagnostic imaging catheter shown in FIG. 1 in a state after a pullback operation; FIG. FIG. 2 is a cross-sectional view showing the tip of the diagnostic imaging catheter shown in FIG. 1; FIG. 2 is a cross-sectional view showing the proximal end of the diagnostic imaging catheter shown in FIG. 1; FIG. 2 is a cross-sectional view showing part of the pullback mechanism of the diagnostic imaging catheter shown in FIG. 1; 5B is a cross-sectional view of the pullback mechanism shown in FIG.
  • FIG. 5A viewed from a different direction by 90°
  • FIG. 5B is a perspective view of the outer tube, spacer and support tube shown in FIG. 5A
  • FIG. 6B is a plan view of the outer tube, spacer, and support tube shown in FIG. 6A as viewed from the distal end side
  • FIG. It is a sectional view showing a part of pullback mechanism in a 2nd embodiment.
  • Figure 8 is a perspective view of the outer tube, spacer and support tube shown in Figure 7
  • FIG. 8B is a plan view of the outer tube, spacer, and support tube shown in FIG. 8A as viewed from the distal end side;
  • FIG. 11 is a perspective view showing an outer tube, spacers and support tubes in a third embodiment
  • 9B is a plan view of the outer tube, spacer, and support tube shown in FIG. 9A as viewed from the distal end side
  • FIG. FIG. 11 is a perspective view showing an outer tube, spacers and support tubes in a fourth embodiment
  • 10B is a plan view of the outer tube, spacer, and support tube shown in FIG. 10A as viewed from the distal end side
  • FIG. FIG. 11 is a perspective view showing an outer tube, spacers and support tubes in a fifth embodiment
  • the diagnostic imaging catheter 1 is a dual type that uses both intravascular ultrasound (IVUS) and optical coherence tomography (OCT).
  • the dual-type diagnostic imaging catheter 1 has three modes: a mode for acquiring a tomographic image only by IVUS, a mode for acquiring a tomographic image only by OCT, and a mode for acquiring tomographic images by both IVUS and OCT. It exists and can be used by switching between these modes.
  • a diagnostic imaging catheter 1 is connected to and driven by an external device 2 .
  • An imaging diagnostic apparatus 3 is composed of the diagnostic imaging catheter 1 and the external device 2 .
  • the diagnostic imaging catheter 1 includes a sheath 4 inserted into a body cavity such as a blood vessel (a blood vessel such as a coronary artery) of a living body, and an outer tube connected to the proximal end of the sheath 4. 5, an inner tube 6 inserted into the outer tube 5 so as to be advanceable and retractable, and a unit connector 7 connected to the proximal end of the outer tube 5 and holding the inner tube 6 so as to be advanceable and retreatable and capable of releasing the holding of the inner tube 6. and a hub 8 connected to the proximal end of the inner tube 6 .
  • the diagnostic imaging catheter 1 includes a driving shaft 9, a housing 10 fixed to the distal end of the driving shaft 9, and a signal transmitting/receiving section 11 accommodated in the housing 10 and transmitting/receiving ultrasonic and/or light signals. and an imaging core 12 .
  • the imaging core 12 is inserted into the sheath 4 , the outer tube 5 and the inner tube 6 , and is axially movable with respect to the sheath 4 and the outer tube 5 together with the inner tube 6 .
  • the distal end means the end of the diagnostic imaging catheter 1 that is inserted into the body cavity
  • the proximal end means the end that is held outside the body cavity of the diagnostic imaging catheter 1.
  • the axial direction means the direction along the central axis O of the drive shaft 9 (that is, the direction in which the drive shaft 9 extends)
  • the radial direction means the direction along a straight line orthogonal to the central axis O
  • the circumferential direction It means the direction around the central axis O.
  • the drive shaft 9 extends through the sheath 4, the outer tube 5 and the inner tube 6 to the inside of the hub 8.
  • the hub 8 , the inner tube 6 , the drive shaft 9 , the housing 10 , and the signal transmitter/receiver 11 are connected to each other so as to be axially movable integrally with respect to the sheath 4 and the outer tube 5 . Therefore, for example, when the hub 8 is pushed toward the distal end side, that is, when a pushing operation is performed, the inner tube 6 connected to the hub 8 is pushed into the outer tube 5 and the unit connector 7, and the drive shaft is pushed. 9.
  • the housing 10 and the signal transmitting/receiving unit 11, that is, the imaging core 12 advance inside the sheath 4, that is, move to the distal side.
  • the inner tube 6 is pulled out from the outer tube 5 and the unit connector 7 as indicated by arrow A1 in FIGS. 1 and 2B.
  • Imaging core 12 moves proximally inside sheath 4 as indicated by arrow A2.
  • the tip of the inner tube 6 reaches the vicinity of the relay connector 13 when the inner tube 6 is pushed all the way to the tip side.
  • the signal transmitter/receiver 11 is positioned at the distal end of the sheath 4 (near the distal end surface of the lumen of the sheath 4).
  • a relay connector 13 connects the sheath 4 and the outer tube 5 .
  • the tip of the inner tube 6 is provided with a locking portion 14 for preventing it from slipping off.
  • the locking portion 14 prevents the inner tube 6 from slipping out of the outer tube 5 .
  • the unit connector 7 has a distal side partial connector 7a and a proximal side partial connector 7b detachably connected to the distal side partial connector 7a.
  • the hub 8 is pulled most proximally, that is, when the inner tube 6 is most pulled out from the outer tube 5 and the unit connector 7, the locking portion 14 is attached to the proximal side partial connector 7b of the unit connector 7. It is configured to hook at a predetermined position on the inner wall.
  • the drive shaft 9 is an elongated hollow member, in which an electric signal line (electric cable) 15 and an optical signal line (optical fiber) 16 connected to the signal transmitter/receiver 11 are provided. are placed.
  • the drive shaft 9 is formed of a coil shaft. Although illustration is omitted, the coil shaft can be formed of, for example, multiple layers of coils with different winding directions. Each coil is usually of the multi-turn type.
  • the coil shaft can be formed of, for example, a three-layer double-wound type coil, but the number of layers and the number of threads can be changed as appropriate.
  • Each coil is made of metal such as stainless steel or Ni--Ti (nickel-titanium) alloy.
  • the signal transmission/reception unit 11 has an ultrasonic transmission/reception unit 11a that transmits/receives ultrasonic waves and an optical transmission/reception unit 11b that transmits/receives light.
  • the ultrasonic transmission/reception unit 11a has a transducer that transmits ultrasonic waves based on pulse signals into the body cavity and receives ultrasonic waves that have been reflected from living tissue in the body cavity.
  • the vibrator is electrically connected via an electrical signal line 15 to an electrical connector 15a (see FIG. 4).
  • the vibrator can be made of, for example, a piezoelectric material such as ceramics or crystal.
  • the light transmitting/receiving unit 11b has an optical element that transmits light into the body cavity and receives light reflected from the living tissue in the body cavity.
  • the optical element is optically connected via an optical signal line 16 to an optical connector 16a (see FIG. 4).
  • the optical element can be formed by a lens, such as a ball lens, for example.
  • the signal transmitter/receiver 11 is housed inside the housing 10 .
  • a proximal end of the housing 10 is fixed to a distal end of the drive shaft 9 .
  • the housing 10 is formed of a metal cylindrical tube, and is provided with an opening 10a in its peripheral surface so as not to hinder the progress of signals transmitted and received by the signal transmitter/receiver 11 .
  • the housing 10 can be formed by laser processing or the like, for example. It should be noted that the housing 10 may be formed by cutting a metal block or by MIM (metal powder injection molding).
  • a tip member 17 is provided at the tip of the housing 10 .
  • the tip member 17 has a substantially hemispherical outer shape, thereby suppressing friction and catching with the inner surface of the sheath 4 .
  • it is good also as a structure which does not provide the front-end
  • the sheath 4 has a lumen 4a into which the drive shaft 9 is inserted so as to be advanced and retracted.
  • a tubular guide wire insertion member 18 through which a guide wire can be passed is attached to the distal end of the sheath 4 so as to be offset from the axial center of the lumen of the sheath 4 .
  • the sheath 4 and the guide wire insertion member 18 are joined by welding or the like.
  • the guidewire insertion member 18 is provided with a marker 19 having X-ray imaging properties.
  • the marker 19 is composed of a metal pipe such as Pt, Au, or the like, which is highly opaque to X-rays.
  • a communicating hole 20 is formed at the distal end of the sheath 4 to communicate the inside and the outside of the lumen 4a.
  • a reinforcing member 21 that is joined to the guide wire inserting member 18 is provided at the distal end of the lumen 4 a of the sheath 4 .
  • a through hole is formed in the reinforcing member 21 so that the communication hole 20 communicates with the inside of the lumen 4 a arranged on the proximal side of the reinforcing member 21 . Note that the reinforcing member 21 may not be provided at the distal end of the sheath 4 .
  • the communication hole 20 is a priming liquid discharge hole for discharging the priming liquid.
  • the priming liquid is released from the communication hole 20 to the outside during the priming process of filling the sheath 4 with the priming liquid, and the priming liquid and gas such as air are introduced into the sheath 4. can be discharged from the inside of the priming liquid and gas such as air.
  • the sheath 4, the guide wire insertion member 18, and the reinforcing member 21 are made of a material having flexibility, and the material is not particularly limited, and examples include styrene, polyolefin, polyurethane, polyester, polyamide, Polyimide-based, polybutadiene-based, trans-polyisoprene-based, fluororubber-based, chlorinated polyethylene-based, and other thermoplastic elastomers, etc., and combinations of one or more of these (polymer alloys, polymer blends, , laminates, etc.) can also be used.
  • the hub 8 includes a hub body 8a which has a tubular shape coaxial with the inner tube 6 and is detachably attached to the external device 2, and a hub body 8a protruding radially outward from the hub body 8a.
  • a port 8b that communicates with the inside of the drive shaft 9;
  • a connecting pipe 8c that is integrally attached to the outer peripheral surface of the drive shaft 9;
  • a bearing 8d that rotatably supports the connecting pipe 8c; a seal member 8e that prevents the priming liquid from leaking sideways;
  • a connector portion 8f that includes an electrical connector 15a and an optical connector 16a and is detachably and integrally attached to the first driving portion 2a of the external device 2.
  • the connector portion 8f can rotate integrally with the connection pipe 8c and the drive shaft 9. As shown in FIG.
  • the proximal end of the inner tube 6 is integrally connected to the distal end of the hub body 8a.
  • the drive shaft 9 is pulled out from the inner tube 6 inside the hub body 8a.
  • the port 8b is connected to an injection device 22 (see FIG. 1) for injecting a priming solution during priming.
  • the injection device 22 has a connector 22a connected to the port 8b and a syringe (not shown) connected to the connector 22a via a tube 22b.
  • the external device 2 comprises a first drive section 2a for rotationally driving the drive shaft 9, a second drive section 2b for moving the drive shaft 9 in the axial direction (i.e. for push/pullback operations), have.
  • the first drive section 2a can be configured by, for example, an electric motor.
  • the second drive section 2b can be configured by, for example, an electric motor and a linear motion conversion mechanism.
  • the linear motion conversion mechanism can convert rotary motion into linear motion, and can be composed of, for example, a ball screw, a rack and pinion mechanism, or the like.
  • the operations of the first drive section 2a and the second drive section 2b are controlled by a control device 2c electrically connected thereto.
  • the control device 2c includes a CPU (Central Processing Unit) and memory.
  • the control device 2c is electrically connected to the display 2d.
  • the signal received by the ultrasonic transmission/reception unit 11a is transmitted to the control device 2c via the electrical connector 15a, subjected to predetermined processing, and displayed as an image on the display 2d.
  • the signal received by the optical transmitter/receiver 11b is transmitted to the controller 2c through the optical connector 16a, subjected to predetermined processing, and displayed as an image on the display 2d.
  • the sheath 4 is inserted into the body cavity, and the imaging core 12 is rotationally driven at a constant rotation speed of about 1000 to 10000 rpm by the first driving section 2a of the external device 2.
  • the imaging core 12 is retracted at a constant speed within the lumen 4a of the sheath 4 by the pullback operation by the driving portion 2b.
  • the control device 2 c of the external device 2 causes the signal transmission/reception unit 11 to transmit and receive signals. Based on the signal received by scanning by rotating and retreating this signal, the state of the tissue around the body cavity is displayed as an image on the display 2d.
  • the diagnostic imaging catheter 1 has a pull-back mechanism 23 at its proximal portion that changes the relative position between the sheath 4 and the drive shaft 9 in order to continuously observe the internal cross section of the body cavity.
  • the pullback mechanism 23 includes an outer tube 5 and a support tube 24 provided radially inside the outer tube 5 and radially outside the drive shaft 9. a spacer 25 for integrally connecting the outer tube 5 and the support tube 24; It has an inner tube 6 which is relatively movable in the axial direction, a relay connector 13 and a unit connector 7 .
  • the relay connector 13 is integrally connected to the sheath 4 and the inner tube 6 is integrally connected to the hub 8 .
  • the outer tube 5, the support tube 24, the inner tube 6 and the drive shaft 9 are provided coaxially and have a common central axis O.
  • the relay connector 13 has a cylindrical shape, and has a cylindrical inner peripheral surface 13a and a cylindrical inner peripheral surface 13a connected to the tip of the proximal inner peripheral surface 13a via an annular stepped portion 13b. and a distal end side inner peripheral surface 13c.
  • the outer peripheral surface of the proximal end of the sheath 4 is joined to the distal inner peripheral surface 13c by welding or the like.
  • the outer peripheral surface of the distal end of the outer tube 5 is joined to the base end side inner peripheral surface 13a by welding or the like.
  • the spacer 25 includes a spacer main body 25a positioned between the outer peripheral surface of the support tube 24 and the inner peripheral surface of the outer tube 5, and a spacer main body 25a extending from the distal end of the spacer main body 25a to the distal end side of the distal end surface of the outer tube 5. and a protrusion 25b that protrudes.
  • the projecting portion 25b constitutes a retaining portion 25c positioned between the outer tube 5 and the relay connector 13 in the axial direction.
  • the retaining portion 25c abuts on the distal end surface of the outer tube 5 to restrict movement to the proximal end side, and the stepped portion 13b of the relay connector 13 to prevent movement to the distal end side. and a tip side end face on which is regulated.
  • the spacer 25 is made of synthetic resin or metal, for example.
  • the spacer main body 25a has a tubular shape, and the outer peripheral surface of the spacer main body 25a has a flat surface shape extending in the axial direction at two points spaced apart from each other in the first direction along the radial direction. Therefore, between the outer peripheral surface of the spacer main body 25a and the inner peripheral surface of the outer tube 5, two axial flow paths 26 extending along the axial direction are formed at two locations separated from each other in the first direction.
  • the projecting portion 25b has a base portion 25d integrally connected to the tip of the spacer main body 25a, and two protruding pieces 25e extending from the tip of the base portion 25d to the tip side of the support tube 24 toward the tip.
  • the two projecting pieces 25e are spaced apart from each other in a second direction perpendicular to the first direction along the radial direction.
  • the outer peripheral surface of the projecting portion 25b has a flat surface shape parallel to the central axis O at two locations spaced apart from each other in the first direction. Therefore, two gaps 27 are formed between the outer peripheral surface of the protruding portion 25b and the base end side inner peripheral surface 13a of the relay connector 13 so as to be spaced apart from each other in the first direction.
  • a gap 28 is formed between the two projecting pieces 25e.
  • the tip of each axial flow path 26 communicates with the tip of the lumen of the support tube 24 through one of the gaps 27 and 28 .
  • the two axial flow paths 26 and the two gaps 27 and 28 provide a communication path 29 (Fig. 5A (see FIG. 5B) is configured.
  • the communicating path 29 is partitioned by the spacer 25 , the outer tube 5 and the relay connector 13 .
  • the outer peripheral surface of the tip of the support tube 24 is joined to the inner peripheral surface of the spacer main body 25a by welding or the like.
  • the outer tube 5 and spacer 25 are not joined.
  • the outer tube 5 is joined to the relay connector 13
  • the spacer 25 is joined to the support tube 24, and the spacer 25 has the retaining portion 25c.
  • Support tubes 24 and spacers 25 are effectively integrated with few joints.
  • the outer tube 5 and the spacer 25 may be joined by welding or the like to further increase the connection strength of the pullback mechanism 23 .
  • the support tube 24 can be formed of, for example, a single-layer or multiple-layer coil or tube.
  • the support tube 24 is made of synthetic resin or metal, for example.
  • Priming is usually performed with the inner tube 6 drawn out from the outer tube 5 (see FIG. 1).
  • the priming liquid introduced from the port 8b passes through the inner tube 6 and branches into a flow path between the outer tube 5 and the support tube 24 and a flow path inside the support tube 24 to the tip side.
  • the priming liquid flowing through the channel between the outer tube 5 and the support tube 24 passes through the communication path 29 formed by the spacer 25, and flows through the channel inside the support tube 24. It joins the priming liquid flowing through and flows toward the tip side.
  • the spacer 25 forms the communication passage 29 that connects the flow path between the outer tube 5 and the support tube 24 to the inside of the support tube 24. Therefore, the pullback mechanism Good priming within 23 can be achieved.
  • the relay connector 13 is joined to the outer tube 5
  • the spacer 25 is joined to the support tube 24, and the spacer 25 has the retaining portion 25c, so that the pullback can be easily assembled.
  • Mechanism 23 can be realized.
  • the configuration of the pullback mechanism 23 can be changed in various ways as long as the spacer 25 forms a communication passage 29 that connects the flow path between the outer tube 5 and the support tube 24 to the inside of the support tube 24 .
  • the pullback mechanism 23 may be configured as in the second embodiment shown in FIGS. 7 to 8B.
  • the spacer 25 has a spacer main body 25a and a protruding portion 25b, and the protruding portion 25b constitutes a retaining portion 25c.
  • the configuration is similar to that of the first embodiment.
  • the configurations of the spacer main body 25a and the projecting portion 25b are different from those in the first embodiment.
  • the spacer main body 25a has a cylindrical shape with one axial groove 30 extending in the axial direction provided at one location on the outer peripheral surface. Therefore, between the outer peripheral surface of the spacer main body 25a and the inner peripheral surface of the outer tube 5, one axial flow path 26 extending along the axial direction is formed.
  • the projecting portion 25b has a cylindrical shape provided with one notch 31 that extends in the axial direction and continues to the axial groove 30 at one location in the circumferential direction.
  • the tip surface of the projecting portion 25 b is flush with the tip surface of the support tube 24 .
  • the notch 31 extends over the entire length in the axial direction on the outer peripheral surface of the protruding portion 25b, and straddles the distal end surface of the protruding portion 25b in the radial direction from the outer peripheral surface of the support tube 24 to the outer peripheral edge of the protruding portion 25b. extended. Therefore, one gap 27 is defined by the spacer 25 , the support tube 24 and the relay connector 13 in the notch 31 .
  • the communication passage 29 is composed of one axial flow passage 26 and one gap 27 .
  • Other configurations are the same as in the case of the first embodiment. Good priming in the pullback mechanism 23 can also be achieved with such a configuration.
  • the pullback mechanism 23 may be configured as in the third embodiment shown in FIGS. 9A and 9B.
  • the axial flow path 26 is partitioned by the axial groove 30 provided on the outer peripheral surface of the spacer body 25a and the inner peripheral surface of the outer tube 5, but in the third embodiment, the axial flow path 26 is defined by an axial groove 30 provided in the inner peripheral surface of the spacer main body 25 a and the outer peripheral surface of the support tube 24 .
  • the notch 31 of the projecting portion 25b extends over the entire length in the axial direction on the inner peripheral surface of the projecting portion 25b. It extends across from the outer peripheral surface to the outer peripheral edge of the projecting portion 25b.
  • one gap 27 is defined by the spacer 25 , the support tube 24 and the relay connector 13 in the notch 31 .
  • the communication path 29 is composed of the axial flow path 26 and the gap 27 described above.
  • Other configurations are the same as in the case of the second embodiment. Good priming in the pullback mechanism 23 can also be achieved with such a configuration.
  • the pullback mechanism 23 may be configured as in the fourth embodiment shown in FIGS. 10A and 10B.
  • the axial flow path 26 is partitioned by the axial groove 30 provided on the outer peripheral surface of the spacer body 25a and the inner peripheral surface of the outer tube 5.
  • the axial flow path 26 are partitioned by two through holes 32 axially penetrating the spacer main body 25a at two locations in the circumferential direction. The tip of each through hole 32 extends radially inward to the outer peripheral surface of the support tube 24 .
  • the spacer 25 is not provided with the projecting portion 25b, and the spacer 25 is composed only of the spacer main body 25a.
  • the communication passage 29 is composed of only two axial flow passages 26 .
  • Other configurations are the same as in the case of the second embodiment.
  • Good priming in the pullback mechanism 23 can also be achieved with such a configuration.
  • the number of axial flow paths 26 can be increased or decreased as appropriate.
  • the pullback mechanism 23 may be configured as in the fifth embodiment shown in FIG.
  • the axial flow path 26 is partitioned by two through-holes 32 axially penetrating the spacer 25 (spacer main body 25a).
  • the spacer 25 is made of a material member, and the axial flow path 26 is formed by the gap in the spacer 25 . Therefore, in the fifth embodiment, the communication path 29 is composed only of the space within the spacer 25.
  • Other configurations are the same as in the case of the fourth embodiment. Good priming in the pullback mechanism 23 can also be achieved with such a configuration.
  • the diagnostic imaging catheter 1 includes an outer tube 5 , a support tube 24 provided radially inward of the outer tube 5 , a spacer 25 integrally connecting the outer tube 5 and the support tube 24 , and an inner tube 6 provided radially inward and radially outward of the support tube 24 and axially movable relative to the outer tube 5 and the support tube 24;
  • the spacer 25 forms a communication passage 29 that connects the flow path between the support tube 24 and the interior of the support tube 24 .
  • the diagnostic imaging catheter 1 has the relay connector 13 joined to the outer tube 5, the spacer 25 is joined to the support tube 24, and the spacer 25 is located between the outer tube 5 and the relay connector 13 in the axial direction. It is preferable to have the retaining portion 25c positioned at .
  • the communicating path 29 is preferably partitioned by the spacer 25 , the outer tube 5 and the relay connector 13 .
  • the spacer 25 includes a spacer main body 25a positioned between the outer peripheral surface of the support tube 24 and the inner peripheral surface of the outer tube 5, and a spacer main body 25a positioned from the distal end of the spacer main body 25a to the distal end side of the distal end surface of the outer tube 5. It is preferable to have a protruding portion 25b that protrudes toward.
  • the spacer main body 25a has a cylindrical shape, and the outer peripheral surface of the spacer main body 25a preferably has a flat surface shape extending in the axial direction at two points spaced apart from each other in the first direction along the radial direction.
  • the diagnostic imaging catheter 1 is not limited to a dual type that uses both IVUS and OCT, and may be a type that uses only IVUS or only OCT.
  • the pull-back mechanism 23 is not limited to the configuration in which the relay connector 13 is integrally connected to the sheath 4 and the inner tube 6 is integrally connected to the hub 8, and the relay connector 13 is integrally connected to the hub 8 and the inner tube 6 is integrally connected. It may be configured to be integrally connected to the sheath 4 .

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pathology (AREA)
  • Veterinary Medicine (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biophysics (AREA)
  • Biomedical Technology (AREA)
  • Public Health (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Physics & Mathematics (AREA)
  • Radiology & Medical Imaging (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Optics & Photonics (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
PCT/JP2022/005434 2021-02-26 2022-02-10 画像診断用カテーテル Ceased WO2022181361A1 (ja)

Priority Applications (3)

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CN202280016709.3A CN116981408A (zh) 2021-02-26 2022-02-10 图像诊断用导管
JP2023502281A JP7776487B2 (ja) 2021-02-26 2022-02-10 画像診断用カテーテル
US18/454,146 US20230389894A1 (en) 2021-02-26 2023-08-23 Image diagnosis catheter

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JP2021-031024 2021-02-26
JP2021031024 2021-02-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4643786A4 (en) * 2023-01-30 2026-04-01 Terumo Corp DIAGNOSTIC IMAGING CATHETER

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002360578A (ja) * 2001-06-08 2002-12-17 Terumo Corp 超音波カテーテル
JP2003190169A (ja) * 2001-12-27 2003-07-08 Olympus Optical Co Ltd 超音波プローブ
JP2011072680A (ja) * 2009-09-30 2011-04-14 Terumo Corp 画像診断用カテーテル
JP2017104362A (ja) * 2015-12-11 2017-06-15 上田日本無線株式会社 回転コネクタ部の液体浸入防止構造

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012223346A (ja) * 2011-04-19 2012-11-15 Terumo Corp カテーテル
JP2015208445A (ja) * 2014-04-25 2015-11-24 株式会社パイオラックスメディカルデバイス 医療用チューブへの医療用線状部材の導入装置
JP6247160B2 (ja) * 2014-06-12 2017-12-13 テルモ株式会社 医療用デバイス
JP6779661B2 (ja) * 2016-05-20 2020-11-04 テルモ株式会社 画像診断用カテーテル
JP7342039B2 (ja) * 2019-01-17 2023-09-11 テルモ株式会社 画像診断用カテーテル及び画像診断装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002360578A (ja) * 2001-06-08 2002-12-17 Terumo Corp 超音波カテーテル
JP2003190169A (ja) * 2001-12-27 2003-07-08 Olympus Optical Co Ltd 超音波プローブ
JP2011072680A (ja) * 2009-09-30 2011-04-14 Terumo Corp 画像診断用カテーテル
JP2017104362A (ja) * 2015-12-11 2017-06-15 上田日本無線株式会社 回転コネクタ部の液体浸入防止構造

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4643786A4 (en) * 2023-01-30 2026-04-01 Terumo Corp DIAGNOSTIC IMAGING CATHETER

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US20230389894A1 (en) 2023-12-07
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CN116981408A (zh) 2023-10-31

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