WO2023095743A1 - 二層コイル構造体 - Google Patents
二層コイル構造体 Download PDFInfo
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- WO2023095743A1 WO2023095743A1 PCT/JP2022/043006 JP2022043006W WO2023095743A1 WO 2023095743 A1 WO2023095743 A1 WO 2023095743A1 JP 2022043006 W JP2022043006 W JP 2022043006W WO 2023095743 A1 WO2023095743 A1 WO 2023095743A1
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- Prior art keywords
- coil
- diameter
- inner coil
- torque
- outer coil
- Prior art date
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- 238000004804 winding Methods 0.000 claims abstract description 39
- 239000002184 metal Substances 0.000 claims abstract description 30
- 239000010410 layer Substances 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 12
- 238000012360 testing method Methods 0.000 description 10
- 239000011295 pitch Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012285 ultrasound imaging Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229920006332 epoxy adhesive Polymers 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000002608 intravascular ultrasound Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0673—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C1/00—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing
- F16C1/02—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing for conveying rotary movements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
-
- 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
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/1028—Rope or cable structures characterised by the number of strands
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/104—Rope or cable structures twisted
- D07B2201/1044—Rope or cable structures twisted characterised by a value or range of the pitch parameter given
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2001—Wires or filaments
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2022—Strands coreless
Definitions
- the present invention relates to a two-layer coil structure.
- Patent Literature 1 discloses a drive shaft 10 that is rotatably built in a catheter sheath 2 of an ultrasound catheter 1 and that is composed of a multi-layered coherent coil made of a metal wire such as stainless steel.
- US Pat. No. 5,900,001 discloses a hollow core coil having inner and outer coils 40 and 42 formed from wound Nitinol disposed within a catheter sheath 18 of an acoustic imaging (ultrasound imaging) catheter 10.
- US Pat. A drive shaft 16 is disclosed.
- Such a double-layered coil structure is rotationally driven by a drive source such as a motor connected to the proximal side, but during operation of the catheter, the double-layered coil structure stacks inside the catheter, causing the coil portion to move.
- a drive source such as a motor connected to the proximal side
- the double-layered coil structure stacks inside the catheter, causing the coil portion to move.
- the rotation resistance of the coil increases, there is a problem that a kink is likely to occur in the coil portion.
- a kinked double-layer coil structure may not be able to transmit rotation well, and the kinking may cause the lead wire running inside the double-layer coil structure to break, and the catheter itself may not function. It may disappear.
- the present invention has been made in view of these points, and an object of the present invention is to provide a two-layer coil structure that has high torsional rigidity and suppresses the occurrence of kinks due to rotational resistance.
- the present invention provides an inner coil formed by spirally winding a metal wire, and an inner coil disposed in close contact with the outer circumference of the inner coil, and a metal wire wound spirally. and an outer coil formed thereon, wherein the winding direction of the inner coil is opposite to the winding direction of the outer coil, and the double-layer coil structure is formed around its circumference.
- the inner coil is twisted in the direction in which the diameter of the inner coil widens, the amount of change in the diameter of the inner coil is smaller than the amount of change in the diameter of the outer coil.
- the amount of change d1 in the diameter of the inner coil when the inner coil is twisted 360° in the circumferential direction and in the direction in which the diameter of the inner coil expands with respect to the length of one unit; , the amount of change d 2 in the diameter of the outer coil when the outer coil is twisted 360° in the circumferential direction and in the direction in which the diameter of the outer coil shrinks, and ⁇ 4.5 ⁇ d 1 /d 2 ⁇ 1 Provide a two-layer coil structure that satisfies the relationship of .6 (Invention 1).
- the two-layer coil structure is twisted in the circumferential direction and in the direction in which the diameter of the inner coil increases.
- the diameter of the inner coil increases while the diameter of the outer coil decreases, and as a result, the outer coil and the inner coil are pressed against each other.
- the amount of change in the diameter of the inner coil is smaller than the amount of change in the diameter of the outer coil, the outer coil will strongly tighten the inner coil, and the layers of the outer coil and the inner coil will be in close contact with each other.
- each of the inner coil and the outer coil has a length of 1596 mm as one unit, and the inner side when the inner coil is twisted 360° in the circumferential direction and the direction in which the diameter of the inner coil expands with respect to the unit length
- the amount of change d 1 in the diameter of the coil and the amount d 2 of change in the diameter of the outer coil when the outer coil is twisted 360° in the circumferential direction and in the direction in which the diameter of the outer coil shrinks are ⁇ 4.5 ⁇ d 1.
- the inner coil is formed by spirally winding 2 or more and 18 or less metal wires (invention 2).
- FIG. 4 is an explanatory diagram showing the structure of a torque coil according to one embodiment of the present invention. It is explanatory drawing which shows the structure of the shaft main body which concerns on the same embodiment.
- 5 is a graph showing the relationship between the ratio of the amount of change in the radial direction of the inner coil and the outer coil in the torque coils of the example and the comparative example, and the maximum torque force and torsional rigidity of the torque coil.
- FIG. 1 is an explanatory diagram showing the overall structure of a torque coil 10 according to this embodiment
- FIG. 2 is an explanatory diagram showing the structure of a shaft body 1 in the torque coil 10.
- the present invention is not limited only to the embodiments described below, and the embodiments are merely exemplifications described to explain the technical features of the present invention.
- the shapes and dimensions shown in each drawing are shown only for the purpose of facilitating the understanding of the contents of the present invention, and do not reflect the actual shapes and dimensions correctly.
- distal end side means the direction along the axial direction of the shaft body 1 that constitutes the torque coil 10, and the direction in which the torque coil 10 advances toward the treatment site.
- Base end side means a direction along the axial direction of the shaft body 1 constituting the torque coil 10 and opposite to the tip end side.
- distal end refers to the distal end of any member or site
- base end refers to the proximal end of any member or site.
- distal end refers to a region of any member or site that includes the distal end and extends from the distal end toward the proximal side to the middle of the member, etc.
- proximal end refers to any part. In a member or region, it refers to a portion that includes the proximal end and extends from the proximal end toward the distal side to the middle of the member or the like.
- the left side of the drawing is the "distal side” that is inserted into the body while being passed through an ultrasonic catheter or the like
- the right side of the drawing is the “base side” that is connected to a driving source such as a motor. It is the end side.
- the torque coil 10 includes a long shaft body 1, a housing 2 attached to the distal end of the shaft body 1, and a connector 3 attached to the proximal end of the shaft body 1.
- the shaft body 1 in the present embodiment includes an inner coil 11 formed by spirally winding a metal wire 111, and a metal wire 111 disposed in close contact with the outer periphery of the inner coil 11.
- An outer coil 12 formed by spirally winding 121 has a hollow two-layer coil structure.
- a housing 2 is attached to the tip of the shaft body 1 of the torque coil 10 .
- the housing 2 contains a transducer (not shown) for ultrasound imaging, which is secured by known bonding techniques such as epoxy resins and adhesives.
- a housing 2 is attached to the tip of the shaft body 1 .
- a coil member made of a material different from that of the shaft body 1 may be joined, or a connecting member such as a medical clip may be joined to connect to an object to be manipulated.
- the tip portion of the shaft body 1 may be brazed with a brazing material and cut into a desired shape.
- a connector 3 for connecting to a drive source 4 such as a motor for rotationally driving the torque coil 10 is attached to the proximal end of the shaft body 1 of the torque coil 10 by a known fixing technique such as epoxy resin or adhesive. It is
- the present invention also provides a medical device shaft in which a torque coil and a drive source are connected by a connector, and a medical device including the shaft.
- the shaft is particularly suitable for medical equipment equipped with a motor, for example, a shaft equipped with an ultrasound transducer at its tip for use in intravascular ultrasound (IVUS), or a shaft for extracting substances from a patient's body lumen. It can be suitably used as a shaft for an internal recovery mechanism used for removal.
- the torque coil of the present invention is particularly effective in shafts used in intravascular ultrasound (IVUS) that rotate at 1000 rpm or more, more preferably 1500 rpm or more.
- the outer diameter of the inner coil 11 is set in the range of 0.24-0.79 mm, preferably in the range of 0.3-0.5 mm.
- the inner diameter of the inner coil 11 is set in the range of 0.17 to 0.57 mm, preferably in the range of 0.2 to 0.4 mm.
- the axial length of the inner coil 11 is set within a range of 1.0 to 3.0 m.
- the material of the metal wire 111 forming the inner coil 11 is not particularly limited, for example, austenitic stainless steel such as SUS304 and SUS316 is used.
- the inner coil 11 is formed by spirally winding a plurality of metal wires 111, and is formed so that there is no gap between adjacent metal wires 111 in the axial direction of the inner coil 11. .
- the inner coil 11 is formed by spirally winding 2 or more and 18 or less metal wires, and the diameter of each metal wire 111 is in the range of 0.03 to 0.11 mm. is set.
- the diameter of each metal wire 111 is preferably in the range of 0.04 to 0.08 mm. If the inner coil 11 is a single-filament coil, there is a risk that the rotational performance of the torque coil 10 will be degraded.
- the outer diameter of the outer coil 12 is set in the range of 0.3-1.0 mm, preferably in the range of 0.4-0.6 mm.
- the inner diameter of the outer coil 12 is set in the range of 0.24-0.79 mm, preferably in the range of 0.3-0.5 mm. Since the outer coil 12 is arranged in close contact with the outer circumference of the inner coil 11 , the inner diameter of the outer coil 12 is set substantially equal to the outer diameter of the inner coil 11 .
- the axial length of the outer coil 12 is the same as that of the inner coil 11, and is set within a range of 1.0 to 3.0 m, for example.
- metal wire 121 forming the outer coil 12 is not particularly limited, for example, austenitic stainless steel such as SUS304 and SUS316 is used.
- Metal wire 111 forming inner coil 11 and metal wire 121 forming outer coil 12 are preferably made of the same material.
- the outer coil 12 is formed by spirally winding a plurality of metal wires 121, and is formed so that there is no gap between adjacent metal wires 121 in the axial direction of the outer coil 12. .
- the outer coil 12 is formed by spirally winding 2 or more and 18 or less metal wires, and the diameter of each metal wire 121 is in the range of 0.03 to 0.50 mm. is set.
- the diameter of each metal wire 121 is preferably in the range of 0.03 to 0.08 mm.
- both the metal wire 111 forming the inner coil 11 and the metal wire 121 forming the outer coil 12 are round wires having a substantially circular cross section, but they are not particularly limited to this. Instead, it may be a round wire with an elliptical cross section, or a flat wire with a substantially rectangular cross section.
- the outer coil 12 is arranged on the outer circumference of the inner coil 11 so that the winding direction of the inner coil 11 and the winding direction of the outer coil 12 are opposite to each other.
- the shaft body 1 is twisted in its circumferential direction and in the direction in which the diameter of the inner coil 11 increases, the diameter of the inner coil 11 increases and the diameter of the outer coil 12 decreases.
- the amount of change in the diameter of the outer coil 12 is larger than the amount of change in the diameter of the inner coil 11. configured to grow.
- the winding angle ⁇ of the inner coil 11 in the longitudinal cross-sectional direction and the winding angle ⁇ of the outer coil 12 in the longitudinal cross-sectional direction are different from each other.
- the winding angle ⁇ in the longitudinal cross-sectional direction is set to be larger than the winding angle ⁇ in the longitudinal cross-sectional direction of the outer coil 12 .
- the winding angle ⁇ of the inner coil 11 is larger than the winding angle ⁇ of the outer coil 12 (that is, the twist angle of the inner coil 11 is higher than the twist angle of the outer coil 12).
- the amount of change in the diameter of the outer coil 12 becomes larger than the amount of change in the diameter of the inner coil 11. .
- the relationship between the winding angle ⁇ of the inner coil 11 in the longitudinal cross-sectional direction and the winding angle ⁇ of the outer coil 12 in the longitudinal cross-sectional direction is determined by the metal wires 111 and 121 forming the inner coil 11 and the outer coil 12, respectively. It is determined by a combination of wire diameter and thread number settings. For example, if the diameter of the wire forming the coil is fixed, the more the number of coil threads, the smaller the winding angle in the longitudinal cross-sectional direction of the coil. The winding angle in the longitudinal cross-sectional direction increases.
- the torque coil 10 since the winding direction of the inner coil 11 and the winding direction of the outer coil 12 are opposite, the torque coil 10 is rotated in the circumferential direction and in the direction in which the diameter of the inner coil 11 widens.
- the diameter of the inner coil 11 expands while the diameter of the outer coil 12 contracts, and as a result, the outer coil 12 and the inner coil 11 are pressed against each other.
- the outer coil 12 will strongly tighten the inner coil 11 , resulting in an interlayer gap between the outer coil 12 and the inner coil 11 . are strongly in close contact with each other, the torsional rigidity of the torque coil 1 is increased, and the occurrence of kinks due to rotational resistance can be suppressed.
- the present invention is not limited to the above embodiments, and various modifications are possible.
- the shape, length, diameter, etc. of the inner coil 11 and the outer coil 12 constituting the torque coil 1 may be appropriately designed according to the purpose of use, the position of use, and the like.
- a lead wire or the like may be inserted inside the shaft body 1, or a member other than the inner coil 11 and the outer coil 12, such as a reinforcing member or an X-ray opaque marker, may be provided in the shaft body 1. may have been
- the inner coil which is a multi-strand coil formed by spirally winding a plurality of metal wires, and the outer circumference of the inner coil are in close contact with each other.
- a plurality of test torque coils are produced, each comprising an outer coil that is a multi-strand coil formed by spirally winding a plurality of metal wires, and a maximum torque force and a maximum torque force are measured using a motor and a torque sensor. Torsional stiffness was measured.
- test torque coils were produced by changing the wire diameter and number of threads of the inner and outer coils. All test torque coils were made to have an inner diameter of 0.32 mm and a length of 1606 mm. Table 1 shows the structures of the inner coil and the outer coil of the manufactured test torque coil.
- Examples 1 to 3 and Comparative Examples 1 to 3 in Table 1 the wire diameters of the inner and outer coils are changed while the number of threads of the inner and outer coils is fixed at 8.
- Examples 4 to 7 and Comparative Examples 4 to 7 in Table 1 the wire diameters of the inner and outer coils were fixed at 0.06 mm, and the numbers of threads of the inner and outer coils were changed.
- the pitch in Table 1 means the length of one period in the axial direction of the coil around which the wire is wound.
- the length of the actually manufactured test torque coil was 1606 mm
- the theoretical change amount d1 in the inner coil diameter and the theoretical change amount d2 in the outer coil diameter were calculated for each coil.
- the length of the test torque was 1596 mm. Both ends of the coil will be attached to the motor and torque sensor, but since 5 mm on each end is chucked to the connector for attaching to the motor and torque sensor, the maximum torque force and torsional rigidity of the test torque coil will be measured. This is because the length of is 1596 mm.
- the ratio (d 1 /d 2 ) of the change amount d 2 of was calculated as follows. (1)
- the PCD of each of the inner coil and the outer coil was determined.
- PCD is a virtual circle centered at the center of the coil when the coil is viewed in cross section, and is the diameter of the virtual circle passing through the radial center of each wire forming the coil, It is a value calculated by "the inner diameter of the coil + the radial length of the wire".
- the amount of change d2 in the diameter of the outer coil was obtained by subtracting the "PCD before twisting of the outer coil” from the "PCD after twisting in the radially contracting direction”. (7) Using them, the ratio ( d1 / d2 ) of the variation d1 in the diameter of the inner coil and the variation d2 in the diameter of the outer coil was determined.
- the twist angle was set to 360°, but when the length of the inner coil and the outer coil is shorter than 1596 mm, the above d 1 /d 2 is the twist angle of “360 [°] ⁇ ⁇ ( It can be obtained as the length of the inner coil and the outer coil [mm])/1596 [mm] ⁇ .
- test torque coils of each example and comparative example thus prepared were attached to a guide wire transfer characteristic measuring instrument PT-1950GHS (manufactured by Protech Co., Ltd.) equipped with a motor and a torque sensor, and rotated in the forward direction by the motor.
- the maximum torque force and the torsional stiffness of the test torque coils of each example and comparative example were measured.
- the measurement was performed multiple times for each example and comparative example, and the average value was calculated as the measurement result. Table 3 shows the measurement results.
- FIG. 3 is a graph showing the relationship between .
- FIG. 3(a) is a graph for Examples 1-3 and Comparative Examples 1-3
- FIG. 3(b) is a graph for Examples 4-7 and Comparative Examples 4-7.
- the torque coils of Examples 1-7 have superior torsional rigidity compared to the torque coils of Comparative Examples 1-7.
- the amount of change d1 in the diameter of the inner coil when the inner coil with a length of 1596 mm is twisted 360° in the circumferential direction and the direction in which the diameter of the inner coil expands and the outer coil with a length of 1596 mm in the circumferential direction
- the change amount d 2 of the diameter of the outer coil when the outer coil is twisted 360° in the direction in which the diameter of the outer coil shrinks satisfies the relationship ⁇ 4.5 ⁇ d 1 /d 2 ⁇ 1.6
- the torque coils of Examples 4 to 7 the torque coils in which the wire diameters of the inner coil and the outer coil are the same and the number of threads of the outer coil is greater than that of the inner coil are extremely excellent. It is understood that the torsional rigidity is exhibited and the maximum torque force is also dramatically improved.
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Abstract
Description
(1)内側コイル、外側コイルそれぞれのPCDを求めた。ここで、PCDとは、コイルを横断面視したときに、コイルの中心を中心とした仮想円であって、コイルを形成する各素線の径方向の中心を通る仮想円の直径であり、「コイル内径+素線の径方向長さ」により計算される値である。
(2)内側コイル、外側コイルそれぞれについて、PCDを直径とする円の円周を「PCD×π」により求めた。
(3)内側コイル、外側コイルそれぞれについて、捻回度を「捻り角度(本実施例では360°)/ピッチ数」により求めた。なお、ピッチ数は「コイルの長さ/1ピッチの長さ」で求められる。1ピッチの長さは10個のピッチを実測し、それを平均して算出した。
(4)内側コイルについて、拡径方向に捻回後のPCDを直径とする円の円周を「PCDπ+({捻回度/360°}×PCDπ)」により求め、その円周をπで割り戻すことにより、拡径方向に捻回後のPCDを算出した。
(5)外側コイルについて、縮径方向に捻回後のPCDを直径とする円の円周を「PCDπ-({捻回度/360°}×PCDπ)」により求め、その円周をπで割り戻すことにより、縮径方向に捻回後のPCDを算出した。
(6)「内側コイルを拡径方向に捻回後のPCD」から「内側コイルの捻回前のPCD」を差し引いて「内側コイルの径の変化量d1」を求め、一方、「外側コイルを縮径方向に捻回後のPCD」から「外側コイルの捻回前のPCD」を差し引いて「外側コイルの径の変化量d2」を求めた。
(7)それらを用いて内側コイルの径の変化量d1及び外側コイルの径の変化量d2の割合(d1/d2)を求めた。
なお、本実施例では捻り角度を360°として実施したが、内側コイル及び外側コイルの長さが1596mmよりも短い場合、上記d1/d2は、捻り角度を「360[°]×{(内側コイル及び外側コイルの長さ[mm])/1596[mm]}」として求めることができる。
1 シャフト本体
11 内側コイル
12 外側コイル
2 ハウジング
3 コネクタ
4 モータ
Claims (2)
- 金属素線を螺旋状に巻回して形成された内側コイルと、
前記内側コイルの外周に密着して配置され、金属素線を螺旋状に巻回して形成された外側コイルと、を備えた二層コイル構造体であって、
前記内側コイルの巻回方向と前記外側コイルの巻回方向とが逆方向であり、
前記二層コイル構造体をその周方向かつ前記内側コイルの径が拡がる方向に捻った場合に、前記内側コイルの径の変化量が、前記外側コイルの径の変化量よりも小さく、
前記内側コイル及び前記外側コイルのそれぞれにおいて長さ1596mmを1単位とし、前記1単位の長さに対して、前記内側コイルをその周方向かつ前記内側コイルの径が拡がる方向に360°捻ったときの前記内側コイルの径の変化量d1と、前記外側コイルをその周方向かつ前記外側コイルの径が縮まる方向に360°捻ったときの前記外側コイルの径の変化量d2とが、-4.5<d1/d2<-1.6の関係を満たす、二層コイル構造体。 - 前記内側コイルが、2本以上18本以下の金属素線を螺旋状に巻回して形成されている、請求項1に記載の二層コイル構造体。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22898526.3A EP4437970A1 (en) | 2021-11-25 | 2022-11-21 | Two-layer coil structure |
CN202280076910.0A CN118302116A (zh) | 2021-11-25 | 2022-11-21 | 双层线圈结构体 |
US18/667,020 US20240301621A1 (en) | 2021-11-25 | 2024-05-17 | Two-layer coil structure |
Applications Claiming Priority (2)
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JP2021191463A JP2023077947A (ja) | 2021-11-25 | 2021-11-25 | 二層コイル構造体 |
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US18/667,020 Continuation US20240301621A1 (en) | 2021-11-25 | 2024-05-17 | Two-layer coil structure |
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WO2023095743A1 true WO2023095743A1 (ja) | 2023-06-01 |
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US (1) | US20240301621A1 (ja) |
EP (1) | EP4437970A1 (ja) |
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WO (1) | WO2023095743A1 (ja) |
Citations (8)
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JPH07289549A (ja) * | 1994-04-26 | 1995-11-07 | Fuji Photo Optical Co Ltd | 超音波診断装置 |
JPH09504214A (ja) | 1993-10-29 | 1997-04-28 | ボストン・サイエンティフィック・コーポレーション | 音響型像形成カテーテル用の駆動シャフト |
US6193706B1 (en) * | 1994-03-31 | 2001-02-27 | Lake Region Manufacturing Co., Inc. | Guidewire extension system with tactile connection indication |
JP2003062072A (ja) | 2001-08-29 | 2003-03-04 | Terumo Corp | 医療用カテーテル内の流体置換方法および医療用カテーテル |
US20030139689A1 (en) * | 2001-11-19 | 2003-07-24 | Leonid Shturman | High torque, low profile intravascular guidewire system |
US20120004606A1 (en) * | 2009-03-06 | 2012-01-05 | Cook Medical Technologies Llc | Reinforced rapid exchange catheter |
JP2014136047A (ja) * | 2013-01-17 | 2014-07-28 | Japan Lifeline Co Ltd | 医療用ガイドワイヤ |
CN213910434U (zh) * | 2020-09-25 | 2021-08-10 | 广州博鑫医疗技术有限公司 | 介入式旋磨装置 |
-
2021
- 2021-11-25 JP JP2021191463A patent/JP2023077947A/ja active Pending
-
2022
- 2022-11-21 EP EP22898526.3A patent/EP4437970A1/en active Pending
- 2022-11-21 WO PCT/JP2022/043006 patent/WO2023095743A1/ja active Application Filing
- 2022-11-21 CN CN202280076910.0A patent/CN118302116A/zh active Pending
-
2024
- 2024-05-17 US US18/667,020 patent/US20240301621A1/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09504214A (ja) | 1993-10-29 | 1997-04-28 | ボストン・サイエンティフィック・コーポレーション | 音響型像形成カテーテル用の駆動シャフト |
US6193706B1 (en) * | 1994-03-31 | 2001-02-27 | Lake Region Manufacturing Co., Inc. | Guidewire extension system with tactile connection indication |
JPH07289549A (ja) * | 1994-04-26 | 1995-11-07 | Fuji Photo Optical Co Ltd | 超音波診断装置 |
JP2003062072A (ja) | 2001-08-29 | 2003-03-04 | Terumo Corp | 医療用カテーテル内の流体置換方法および医療用カテーテル |
US20030139689A1 (en) * | 2001-11-19 | 2003-07-24 | Leonid Shturman | High torque, low profile intravascular guidewire system |
US20120004606A1 (en) * | 2009-03-06 | 2012-01-05 | Cook Medical Technologies Llc | Reinforced rapid exchange catheter |
JP2014136047A (ja) * | 2013-01-17 | 2014-07-28 | Japan Lifeline Co Ltd | 医療用ガイドワイヤ |
CN213910434U (zh) * | 2020-09-25 | 2021-08-10 | 广州博鑫医疗技术有限公司 | 介入式旋磨装置 |
Also Published As
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JP2023077947A (ja) | 2023-06-06 |
CN118302116A (zh) | 2024-07-05 |
EP4437970A1 (en) | 2024-10-02 |
US20240301621A1 (en) | 2024-09-12 |
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