WO2023240787A1 - 可调弯导管 - Google Patents

可调弯导管 Download PDF

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Publication number
WO2023240787A1
WO2023240787A1 PCT/CN2022/113541 CN2022113541W WO2023240787A1 WO 2023240787 A1 WO2023240787 A1 WO 2023240787A1 CN 2022113541 W CN2022113541 W CN 2022113541W WO 2023240787 A1 WO2023240787 A1 WO 2023240787A1
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WO
WIPO (PCT)
Prior art keywords
bending
section
distal
catheter
adjustable
Prior art date
Application number
PCT/CN2022/113541
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English (en)
French (fr)
Inventor
李�瑞
闫伟
李克
龚善石
Original Assignee
上海普实医疗器械股份有限公司
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Application filed by 上海普实医疗器械股份有限公司 filed Critical 上海普实医疗器械股份有限公司
Publication of WO2023240787A1 publication Critical patent/WO2023240787A1/zh

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105Steering means as part of the catheter or advancing means; Markers for positioning
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0113Mechanical advancing means, e.g. catheter dispensers

Definitions

  • the present invention relates to the medical field, and further relates to an adjustable and bendable catheter.
  • the head end of the catheter usually needs to be coaxially aligned with the target position.
  • the catheter is usually bent to a certain extent according to the characteristics of the implantation location, so that the distal end of the catheter reaches the predetermined position. After the position is reached, it can be aligned with the target position.
  • the tissue morphology of the human body has strong individual differences. Pre-bending the distal end of the catheter into a certain shape cannot be suitable for all patients' tissues. It is often difficult to achieve the effect of aligning the distal end of the catheter to the target position. to the challenge. For example, when implanting a device into the left atrial appendage through a catheter, due to the complex anatomy of the left atrial appendage and strong individual differences, it may take a long time to adjust the existing catheter to achieve better coaxiality. , or in some cases, coaxiality cannot be achieved, resulting in prolonged surgery or inability to perform, thus posing higher risks to the patient.
  • the purpose of the present invention is to provide an adjustable bending catheter, and the operator can operate the handle to adjust the angle of the distal bending section at a reasonable speed, thereby achieving precise control of the distal end of the catheter, so that the The distal end of the catheter is coaxial with the various implantation positions.
  • the implantation device After the implantation device is pushed out from the distal end of the catheter, it can be implanted in the preset position in a more suitable state, improving implantation efficiency and expanding implantation. Scope of application of the device.
  • an adjustable bending conduit including:
  • a catheter the proximal end of the catheter is installed on the handle, the adjustable and bendable catheter has a guide channel that passes through the handle and the catheter, the catheter has a proximal body section and a distal bending section, so The distal bending section includes a first section and a second section, the second end is connected to the distal end of the proximal body section, the first section is connected to the distal end of the second section, and the The hardness of the distal bending section is lower than the hardness of the proximal body section;
  • Bending line the distal end of the bending line is fixed to the distal bending section, the proximal end is connected to the handle, and the handle can be operated to control the bending line to adjust the distal bending section. Bend angle.
  • the plane where the central axis of the second section and the central axis of the proximal body section is located is a reference plane, and the distal end of the first section can be moved by the The bending wire is pulled in a direction away from the reference plane.
  • the angle range between the central axis of the first section and the reference plane is between 10° and 60°. .
  • the central axis of the first section is located on the reference plane, and the bending line is fixed on the first section.
  • the distal end of the bending line has a second preset included angle between the plane formed by the distal end point of the bending line and the central axis of the first section and the reference plane, and the second preset included angle is The range is between 0 and 90°.
  • the number of the bending lines is two.
  • the distal end points of the two bending lines are located on the datum. on both sides of the plane and are arranged symmetrically with respect to the reference plane.
  • the bending line includes a first bending line and a second bending line, and the distal end of the first bending line is fixed to the distal end of the first section. end, the distal end of the second bending line is fixed to the distal end of the second section;
  • the distance between the distal end of the first bending line, the distal end of the second bending line and the central axis of the catheter is The angle range is between 30° and 150°;
  • the angle range between the central axis of the second section and the central axis of the proximal body section is between 30° and 150°.
  • the hardness of the first section is between 35D and 55D
  • the hardness of the second section is between 55 and 65D
  • the hardness of the proximal main section is between 75D and above.
  • the handle includes:
  • the handle body has an installation space and an movable hole, and the movable hole is connected with the installation space;
  • a receiving mechanism is installed at the proximal end of the handle body
  • the bending line operating mechanism includes a built-in movable block and an external toggle piece.
  • the built-in movable block is installed in the installation space.
  • the external toggle piece is rotatably installed on the side wall of the handle body, and At least part of the external toggle member passes through the movable hole and is threadedly connected to the built-in movable block. Rotating the external toggle member can drive the built-in movable block along the axial direction of the installation space.
  • the built-in movable block has a fixed part, and the proximal end of the bending wire is fixed to the fixed part;
  • the handle further includes a support mechanism installed on the distal end of the handle body, and the distal ends of the first limiting rod and the second limiting rod are respectively They are fixed on the supporting mechanism, and the proximal ends are respectively fixed on the receiving mechanisms.
  • the fixed part of the built-in movable block has a receiving groove
  • the distal side wall and the proximal side wall of the receiving groove respectively have a receiving groove connected to the receiving groove.
  • a distal threading hole and a proximal threading hole, the proximal end of the bending wire passes through the distal threading hole, the receiving groove and the proximal threading hole in sequence;
  • the handle also includes a sealing plug, the sealing plug has a wire-containing groove, the sealing plug is installed in the receiving groove, the proximal end of the bending wire is located in the wire-containing groove, and the sealing plug can be rotated to Change the angle between the bending line in the wire groove and the bending line in the distal threading hole.
  • the conduit includes an inner conduit and an outer conduit, and the bending wire is movably installed between the inner conduit and the outer conduit.
  • the reinforcement layer includes metal wires wound around the outer wall of the inner catheter in an orderly manner, and the density of the metal wires corresponding to the distal bending section is low.
  • the density of the metal wire corresponding to the proximal body segment is low.
  • the angle between the metal wires corresponding to the proximal body section is less than 60°, and the distal end The angle between the metal wires corresponding to the bending section is greater than 60°.
  • the number of metal wire layers of the reinforcement layer corresponding to the proximal body section is greater than the number of metal wire layers corresponding to the distal bending section. number.
  • the bending line extends in a curve along the axial direction of the conduit.
  • the adjustable bending conduit provided by the present invention has at least one of the following beneficial effects:
  • the operator can operate the handle to adjust the angle of the distal bending section and adjust the coaxial state of the distal end of the catheter and the implantation position, so that the instrument can move from the desired position. After the distal end of the catheter is pushed out, it can be implanted in a preset position in a relatively suitable state to improve the implantation effect;
  • the first limiting rod and the second limiting rod can serve as guide rails for the built-in movable block to slide.
  • the first limiting rods are spaced apart.
  • the position lever and the second limit lever can also prevent the built-in movable block from rotating following the external toggle member, improving the stability of the axial movement of the built-in movable block;
  • Figure 1 is an application diagram of the adjustable bending conduit according to the preferred embodiment of the present invention.
  • Figure 2 is a perspective view of the adjustable bending conduit according to the preferred embodiment of the present invention.
  • Figure 3 is a perspective view of a modified embodiment of the adjustable bending conduit according to the preferred embodiment of the present invention.
  • Fig. 4 is a schematic structural diagram of the catheter of the adjustable bending catheter according to the preferred embodiment of the present invention.
  • Figure 5 is a structural schematic diagram of a modified embodiment of the adjustable bending catheter according to the preferred embodiment of the present invention.
  • Figure 6 is a schematic structural diagram of a modified embodiment of the adjustable-bend catheter according to the preferred embodiment of the present invention.
  • Figure 8 is a schematic three-dimensional structural diagram of the adjustable bending conduit according to the second preferred embodiment of the present invention.
  • Figure 9 is a schematic diagram of the bending direction of the adjustable bending catheter according to the preferred embodiment of the present invention.
  • Figure 10 is a schematic diagram of the bending angle of the adjustable bending conduit according to the preferred embodiment of the present invention.
  • Figure 12 is a schematic diagram of a modified embodiment of the arrangement position of the bending cables of the adjustable bending conduit according to the preferred embodiment of the present invention.
  • Figure 14 is a schematic structural diagram of the distal arrangement of the bending line of the adjustable bending catheter according to the third preferred embodiment of the present invention.
  • Figure 15 is a schematic structural diagram of the handle of the adjustable bending catheter according to the preferred embodiment of the present invention.
  • Figure 16 is a cross-sectional view along line A-A in Figure 15;
  • Figure 17 is a schematic diagram of the internal structure of the handle of the adjustable bending catheter according to the preferred embodiment of the present invention.
  • Figure 18 is a perspective view of the sealing plug of the handle of the adjustable bending catheter according to the preferred embodiment of the present invention.
  • Figure 19 is a perspective view of the hemostatic valve and receiving mechanism of the handle of the adjustable and bendable catheter according to the preferred embodiment of the present invention.
  • Handle 10 handle body 11, installation space 111, movable hole 112, receiving mechanism 12, distal receiving groove 121, proximal receiving groove 122, communication channel 123, bending cable operating mechanism 13, built-in movable block 131, fixed part 1311, catheter perforation 1312, external toggle member 132, receiving groove 133, distal threading hole 134, proximal threading hole 135, first limiting rod 141, second limiting rod 142, first limiting groove 151, Second limiting groove 152, support mechanism 16, sealing plug 17, wire groove 170, hemostatic valve 18, spiral groove 180, propulsion part 181, flow blocking member 182, outer support arm 183, inner support arm 184, limit groove 185.
  • connection should be understood in a broad sense.
  • it can be a fixed connection or a detachable connection, or Integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components.
  • connection should be understood in a broad sense.
  • it can be a fixed connection or a detachable connection, or Integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components.
  • the adjustable-bend catheter provided in this application is preferably suitable for establishing a channel for implanting devices into the left atrial appendage through blood vessels, and can also be used as a channel for performing interventional surgeries on other tissues of the human body. Specific applications of the adjustable-bend catheter The scenarios should not constitute a limitation on this application.
  • the distal end of the catheter 20 of the adjustable catheter is adapted to enter the right atrium through the inferior vena cava. After reaching the left atrium through the interatrial septum, the distal end of the catheter 20 is placed on the left atrium. Implantation site near the atrial appendage. There is a roughly acute angle between the inferior vena cava and the atrial septum. The azimuth angle between the atrial septal puncture point and the left atrial appendage orifice has a wider range of individual differences, so the distance of the adjustable catheter is The navigation angle of the end needs to be set so that it can reach the left atrial appendage orifice more efficiently and be coaxial with the left atrial appendage orifice.
  • the distal end of the distal bending section 22 is provided with a fixing element 23 , and the distal end of the bending wire 30 is fixed to the fixing element 23 .
  • the fixing element 23 is a metal ring fixed to the distal bending section 22 .
  • the fixing element 23 and the distal bending section 22 are integrally formed.
  • the hardness of the outer conduit 242 corresponding to the distal bending section 22 is 35D to 55D, and the hardness of the outer conduit 242 corresponding to the proximal body section 21 is 55D to 75D.
  • the bending section 22 and the inner catheter 241 corresponding to the proximal body section 21 have the same hardness, so that the hardness of the distal bending section 22 is lower than the hardness of the proximal body section 21 .
  • the radial angle between the metal wires corresponding to the proximal body section is less than 60°, preferably no more than 45°, and the metal wire
  • the pitch between the wires is small, and the supporting force of the metal wire in the radial direction is large, forming a high-hardness section; in the plane projection through the axis of the catheter, the metal wire corresponding to the distal bending section
  • the angle between the wires is greater than 60°, preferably greater than 90°.
  • the pitch between the metal wires is larger, and the supporting force of the metal wires in the radial direction is reduced, forming a low hardness section.
  • the first preset included angle a and the second preset included angle c are generally negatively correlated, the first preset included angle a increases, and the second preset included angle c decreases; so The first preset included angle a decreases, and the second preset included angle c increases. Setting the first preset included angle a and the second preset included angle c to have a substantially negative correlation can help realize the alignment between the distal end of the distal bending section 22 and the implantation position. Coaxial status.
  • both the first section 221 and the second section 222 can be bent.
  • the bending line 30 includes a first bending line 31 and a second bending line 32.
  • the distal end of the first bending line 31 is fixed to the distal end of the first section 221.
  • the distal end of the wire 32 is fixed to the distal end of the second section 222 .
  • both the first section 221 and the second section 222 can be bent, which can make the angle adjustment of the distal bending section 22 more flexible.
  • the operator can first pull the second bending wire 32 proximally and control the second section 222 to start bending at a preset angle; and then pull the first bending wire 31 proximally.
  • the first section 221 is controlled to start bending at a preset angle to adjust the coaxiality between the distal end of the first section 221 and the implantation position.
  • the distal bending section 22 when the distal bending section 22 is in the initial state, the distal end of the first bending line 31, the distal end of the second bending line 32 and the distal bending section 22 are in the initial state.
  • the angle d between the lines connecting the central axes of the bend sections 22 ranges from 30° to 150°, preferably from 60° to 120°.
  • the angle range between the central axis of the second section 222 and the central axis of the proximal body section 21 is between 30° and 150°.
  • the second section 222 may have a certain preset angle, and the first section 221 may also have a certain preset angle. With this arrangement, the bending efficiency of the bending conduit can be further improved. Whether the first section 221 and the second section 222 have a preset angle shall not limit the present invention.
  • the operator can control the built-in movable block 131 to move along its axial direction in the installation space 111 by turning the external toggle member 132 to drive the bending line 30 to move and adjust the position of the bending line 30 . Describing the angle of the distal bending section 22 is easy to operate.
  • the external toggle member 132 and the built-in movable block 131 are connected through a four-head thread, which can greatly increase the bending efficiency.
  • the external toggle member 132 can be set to rotate by half.
  • the distal bending section 22 can be controlled to adjust to the maximum bending angle within one week.
  • the external dialing member 132 and the built-in movable block 131 can also be connected through ordinary threads, two-head threads or three-head threads.
  • the external dialing member 132 and the built-in movable block 131 The specific threaded fitting connection method between the movable blocks 131 shall not constitute a limitation on the present application.
  • first limiting groove 151 and the second limiting groove 152 are located on the inner wall of the built-in movable block 131 and communicate with the conduit through hole 1312.
  • first limiting rod 141 is installed in the first limiting groove 151
  • second limiting rod 142 is installed in the second limiting groove 152
  • the conduit 20 is installed in the conduit through hole 1312
  • the conduit 20 is located between the first limiting rod 141 and the second limiting rod 142 .
  • rotating the blocking plug 17 can change the angle between the bending line 30 in the wire groove 170 and the bending line 30 in the distal threading hole 134, preferably 90°,
  • the bending adjustment wire 30 is tightened so that the proximal end of the bending adjustment wire 30 does not move.
  • the diameter of the sealing plug 17 is slightly larger than the diameter of the receiving groove 133 , and the sealing plug 17 is fixed in the receiving groove 133 by an interference fit.
  • the sealing plug 17 can also be fixed in the receiving groove 133 by gluing or welding. The specific installation method of the sealing plug 17 should not constitute a limitation on this application.
  • the flow blocking member 182 has a flow blocking hole (not shown in the figure), The blocking hole is connected with the communication channel 123. Rotating the hemostatic valve 18 drives the pushing part 181 to move distally and squeeze the blocking member 182. The blocking hole is closed, and the proximal The end receiving groove 122 is separated from the distal receiving groove 121 .
  • the radial size of the communication channel 123 is smaller than the radial size of the proximal accommodation groove 122.
  • the side walls of the communication channel 123 form a step limiting structure, which abuts the flow blocking member 182 to prevent the flow of the flow block 182.
  • the flow blocking member 182 is used for limiting.
  • the hemostatic valve 18 includes an outer support arm 183 and an inner support arm 184.
  • the outer support arm 183 and the inner support arm 184 are spaced apart, and the gap between them forms the spiral groove. 180.
  • the distal end of the inner support arm 184 is installed in the proximal receiving groove 122 of the receiving mechanism 12 , and the distal end of the inner support arm 184 forms the pushing portion 181 .
  • the flow blocking member 182 is made of elastic material, including but not limited to silicone, soft PVC, TPE or TPR.
  • the distance between the pushing part 181 and the communication channel 123 is greater than the axial width of the flow blocking member 182; when relative to the When the receiving mechanism 12 rotates the hemostatic valve 18 so that the proximal end of the receiving mechanism 12 moves to the bottom of the spiral groove 180, the distance between the pushing part 181 and the communication channel 123 is less than the resistance.
  • the axial width of the flow member 182, the flow blocking member 182 is extruded and deformed, and expands in the radial direction to close the flow blocking hole.
  • the outer wall of the spiral groove 180 of the hemostatic valve 18 has a limiting groove 185 connected with the spiral groove 180.
  • the distal end of the limiting groove 185 has a first limiting arm 186, a proximal end There is a second limiting arm 187 , and the proximal outer wall of the receiving mechanism 12 has a third limiting arm 188 extending radially outward, and the third limiting arm 188 extends into the limiting groove 185 .
  • the inner surface of the outer support arm 183 forms the limiting groove 185 .
  • the third limiting arm 188 can cooperate with the first limiting arm 186 and the third limiting arm 186 .
  • the two limiting arms 187 cooperate to limit the upper limit in the axial direction.
  • the first limiting arm 186 abuts against the third limiting arm 188 , the distance between the pushing part 181 and the communication channel 123 is larger, and the blocking member 182
  • the flow hole is in an open state; when the second limiting arm 187 is in contact with the third limiting arm 188, the distance between the pushing part 181 and the communication channel 123 is small, and the flow blocking
  • the blocking hole of member 182 is in a closed state.
  • the hemostatic valve 18 further includes a pressing member 189 .
  • the pressing member 189 is installed in the proximal receiving groove 122, and is located between the pushing part 181 and the flow blocking member 182.
  • the middle position of the pressing member 189 has a A through hole corresponding to the flow blocking hole.
  • the pressing member 189 is made of relatively rigid material, such as but not limited to medical grade modified nylon material.
  • the pressing member 189 is used to assist the pushing part 181 to effectively compress the flow blocking member 182 .
  • the connection between the distal outer surface and the distal surface of the receiving mechanism 12 has a chamfer.
  • Providing a chamfer at the distal end of the receiving mechanism 12 can reduce the mechanical damage caused by the receiving mechanism 12 to the human body.
  • the chamfer can be either an arc-shaped chamfer or an oblique chamfer.

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Abstract

一种可调弯导管,包括:手柄(10)、导管(20)和调弯线(30),其中导管(20)的近端安装于手柄(10)。可调弯导管具有贯通手柄(10)和导管(20)的导引通道,导管(20)具有近端主体段(21)和远端调弯段(22),远端调弯段(22)包括第一段(221)和第二段(222),第二段(222)连接于近端主体段(21)的远端,第一段(221)连接于第二段(222)的远端,并且远端调弯段(22)的硬度低于近端主体段(21)的硬度。调弯线(30)的远端固定于远端调弯段(22),近端连接于手柄(10),操作手柄(10)能够控制调弯线(30)调整远端调弯段(22)的弯曲角度。操作者能够操作手柄(10)调整远端调弯段(22)的角度,调整导管(20)的远端与植入位置的同轴状态,使得器械自导管(20)的远端推出后能够以较为适配的状态植入预设位置,提高植入效果。

Description

可调弯导管 技术领域
本发明涉及医疗领域,进一步地涉及可调弯导管。
背景技术
导管是介入手术中常见的手术器械,在经导管的微创介入治疗中,通常需要先将导管通过血管植入到预期位置,比如心脏或者特定血管,然后将器械沿着导管的通道植入目标位置,以实现对目标位置进行治疗的目的。
为了达到器械植入的目的,导管的头端通常需要与目标位置同轴对准,现有技术中通常根据植入位置的特点预先对导管进行一定的弯曲设置,以使得导管的远端达到预定位置后能够对准目标位置。
需要指出的是,人体的组织形态具有较强的个体差异性,预先将导管的远端弯折一定的形状不能够适用于所有患者的组织,实现导管的远端对准目标位置的效果常常遇到挑战。比如,在经导管将器械植入左心耳时,由于左心耳具有复杂的解剖形态,并且具有较强的个体差异,现有的导管为实现较好的同轴度,可能需要较长时间进行调整,或者某些情况下,无法实现同轴,导致手术时间延长或无法进行,因而为患者造成较高风险。
发明内容
针对上述技术问题,本发明的目的在于提供可调弯导管,操作者能够操作所述手柄合理速度调整所述远端调弯段的角度,实现对所述导管远端的精准操控,使得所述导管的远端较快与多样化植入位置呈同轴状态,植入器械自所述导管的远端推出后能够以较为适配的状态植入预设位置,提升植入效率、扩大 植入器械的适用范围。
为了实现上述目的,本发明提供可调弯导管,包括:
手柄;
导管,所述导管的近端安装于所述手柄,所述可调弯导管具有贯通所述手柄和所述导管的导引通道,所述导管具有近端主体段和远端调弯段,所述远端调弯段包括第一段和第二段,所述第二端连接于所述近端主体段的远端,所述第一段连接于所述第二段的远端,并且所述远端调弯段的硬度低于所述近端主体段的硬度;
调弯线,所述调弯线的远端固定于所述远端调弯段,近端连接于所述手柄,操作所述手柄能够控制所述调弯线调整所述远端调弯段的弯曲角度。
在上述实施例所提供的可调弯导管中,所述第二段的中轴线与所述近端主体段的中轴线所在的平面为基准平面,所述第一段的远端能够被所述调弯线拉动向远离所述基准平面的方向运动,所述第一段弯折后,所述第一段的中轴线与所述基准平面之间的夹角范围在10°~60°之间。
在上述实施例所提供的可调弯导管中,在所述第一段处于初始状态时,所述第一段的中轴线位于所述基准平面,所述调弯线固定于所述第一段的远端,所述调弯线的远端端点与所述第一段的中轴线所形成的平面与所述基准平面之间具有第二预设夹角,所述第二预设夹角的范围在0~90°之间。
在上述实施例所提供的可调弯导管中,所述调弯线的数量是两条,在所述第一段处于初始状态时,两条所述调弯线的远端端点位于所述基准平面的两侧,并且相对于所述基准平面对称设置。
在上述实施例所提供的可调弯导管中,所述调弯线包括第一调弯线和第二调弯线,所述第一调弯线的远端固定于所述第一段的远端,所述第二调弯线的远端固定于所述第二段的远端;
在所述远端调弯段处于初始状态时,所述第一调弯线的远端、所述第二调 弯线的远端与所述导管的中轴线之间的连线之间的夹角范围在30°~150°之间;
当所述第二段处于调弯状态时,所述第二段的中轴线与所述近端主体段的中轴线之间的夹角范围在30°~150°之间。
在上述实施例所提供的可调弯导管中,所述第一段的硬度在35D~55D之间,所述第二段的硬度在55~65D之间,所述近端主体段的硬度在75D以上。
在上述实施例所提供的可调弯导管中,所述第二段的中轴线与所述近端主体段的中轴线之间具有第一预设夹角,所述第一预设夹角的范围在30°~60°之间。
在上述实施例所提供的可调弯导管中,所述手柄包括:
手柄主体,具有安装空间和活动孔,所述活动孔与所述安装空间连通;
容接机构,安装于所述手柄主体的近端;
调弯线操作机构,包括内置活动块和外置拨动件,所述内置活动块安装于所述安装空间,所述外置拨动件可转动地安装于所述手柄主体的侧壁,并且所述外置拨动件的至少一部分穿过所述活动孔与所述内置活动块螺纹配合连接,转动所述外置拨动件能够带动所述内置活动块沿所述安装空间的轴向方向运动;
所述内置活动块具有固定部,所述调弯线的近端固定于所述固定部;
所述内置活动块具有导管穿孔,所述导管的近端穿过所述导管穿孔,所述导管的近端固定于所述容接机构。
在上述实施例所提供的可调弯导管中,所述手柄还包括间隔安装于所述安装空间的第一限位杆和第二限位杆;所述内置活动块具有间隔设置的第一限位槽和第二限位槽,所述第一限位杆安装于所述第一限位槽,所述第二限位杆安装于所述第二限位槽,所述内置活动块能够沿着所述第一限位杆和所述第二限位杆滑动。
在上述实施例所提供的可调弯导管中,所述第一限位槽和所述第二限位槽位于所述内置活动块的内壁并与所述导管穿孔连通。
在上述实施例所提供的可调弯导管中,所述手柄还包括安装于所述手柄主体的远端的支撑机构,所述第一限位杆和所述第二限位杆的远端分别固定于所述支撑机构,近端分别固定于所述容接机构。
在上述实施例所提供的可调弯导管中,所述内置活动块的所述固定部具有容纳槽,所述容纳槽的远端侧壁和近端侧壁分别具有与所述容纳槽连通的远端穿线孔和近端穿线孔,所述调弯线的近端依次穿过所述远端穿线孔、所述容纳槽以及所述近端穿线孔;
所述手柄还包括封堵塞,所述封堵塞具有容线槽,所述封堵塞安装于所述容纳槽,所述调弯线的近端位于所述容线槽中,转动所述封堵塞能够改变所述容线槽中的所述调弯线与所述远端穿线孔中的所述调弯线之间的角度。
在上述实施例所提供的可调弯导管中,所述调弯线操作机构的数量是两个以上。
在上述实施例所提供的可调弯导管中,所述导管包括内层导管和外层导管,所述调弯线可活动地安装于所述内层导管和所述外层导管之间。
在上述实施例所提供的可调弯导管中,所述导管还包括位于所述内层导管和所述外层导管之间的加强层,所述远端调弯段对应的所述加强层的硬度低于所述近端主体段对应的所述加强层的硬度。
在上述实施例所提供的可调弯导管中,所述加强层包括有序缠绕于所述内层导管的外侧壁的金属丝,所述远端调弯段对应的所述金属丝的密度低于所述近端主体段对应的所述金属丝的密度。
在上述实施例所提供的可调弯导管中,在经所述导管的轴线的平面投影中,所述近端主体段对应的所述金属丝之间的夹角小于60°,所述远端调弯段对应的所述金属丝之间的夹角大于60°。
在上述实施例所提供的可调弯导管中,所述近端主体段对应的所述加强层的所述金属丝的层数多于所述远端调弯段对应的所述金属丝的层数。
在上述实施例所提供的可调弯导管中,所述调弯线沿所述导管的轴向方向呈曲线延伸。
与现有技术相比,本发明所提供的可调弯导管具有以下至少一条有益效果:
1.本发明所提供的可调弯导管,操作者能够操作所述手柄调整所述远端调弯段的角度,调整所述导管的远端与植入位置的同轴状态,使得器械自所述导管的远端推出后能够以较为适配的状态植入预设位置,提高植入效果;
2.本发明所提供的可调弯导管,所述第一限位杆和所述第二限位杆能够作为所述内置活动块滑动的导轨,另一方面,间隔设置的所述第一限位杆和所述第二限位杆还能够防止所述内置活动块跟随所述外置拨动件转动,提高所述内置活动块轴向移动的稳定性;
3.本发明所提供的可调弯导管,调弯线的远端固定于所述远端调弯段的位置不是位于与基准平面的距离最大处,在所述远端调弯段的远端受到所述调弯线的拉力作用时实际作用于所述远端调弯段的拉力有所减小,能够避免所述远端调弯段的远端弯曲角度过快,提高操作过程的稳定性,降低误伤心内组织的风险。
附图说明
下面将以明确易懂的方式,结合附图说明优选实施方式,对本发明的上述特性、技术特征、优点及其实现方式予以进一步说明。
图1是本发明的优选实施例的可调弯导管的应用图;
图2是本发明的优选实施例的可调弯导管的立体图;
图3是本发明的优选实施例的可调弯导管的一变形实施方式的立体图;
图4是本发明的优选实施例的可调弯导管的导管的结构示意图;
图5是本发明的优选实施例的可调弯导管的导管的一变形实施方式的结构示意图;
图6是本发明的优选实施例的可调弯导管的导管的一变形实施方式的结构示意图;
图7是本发明的优选实施例的可调弯导管的导管的一变形实施方式的结构示意图;
图8是本发明的第二优选实施例的可调弯导管的立体结构示意图;
图9是本发明的优选实施例的可调弯导管的导管的弯曲方向示意图;
图10是本发明的优选实施例的可调弯导管的弯曲角度示意图;
图11是本发明的优选实施例的可调弯导管的调弯拉线的布置位置示意图;
图12是本发明的优选实施例的可调弯导管的调弯拉线的布置位置的一变形实施方式的示意图
图13是本发明的第三优选实施例的可调弯导管的立体结构示意图;
图14是本发明的第三优选实施例的可调弯导管的调弯线的远端布置结构示意图;
图15是本发明的优选实施例的可调弯导管的手柄的结构示意图;
图16是图15中A-A线的剖视图;
图17是本发明的优选实施例的可调弯导管的手柄内部结构示意图;
图18是本发明的优选实施例的可调弯导管的手柄的封堵塞的立体图;
图19是本发明的优选实施例的可调弯导管的手柄的止血阀和容接机构的立体图;
图20是图19中B-B线的剖视图;
图21是图20中a处的放大图。
附图标号说明:
手柄10,手柄主体11,安装空间111,活动孔112,容接机构12,远端容纳槽121,近端容纳槽122,连通通道123,调弯拉线操作机构13,内置活动块131,固定部1311,导管穿孔1312,外置拨动件132,容纳槽133,远端穿线孔134,近端穿线孔135,第一限位杆141,第二限位杆142,第一限位槽151,第二限位槽152,支撑机构16,封堵塞17,容线槽170,止血阀18,螺旋槽180,推进部181,阻流件182,外侧支撑臂183,内侧支撑臂184,限位槽185,第一限位臂186,第二限位臂187,第三限位臂188,压覆件189,冲洗接头19,导管20,近端主体段21,基准平面213,远端调弯段22,第一段221,第二段222,固定元件23,第一固定元件231,第二固定元件232,内层导管241,外层导管242,加强层243,内层弹簧2431,外层缠绕丝2432,调弯线30,第一调弯线31,第二调弯线32,导引通道100。
具体实施方式
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对照附图说明本发明的具体实施方式。显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图,并获得其他的实施方式。
为使图面简洁,各图中只示意性地表示出了与发明相关的部分,它们并不代表其作为产品的实际结构。另外,以使图面简洁便于理解,在有些图中具有相同结构或功能的部件,仅示意性地绘示了其中的一个,或仅标出了其中的一个。在本文中,“一个”不仅表示“仅此一个”,也可以表示“多于一个”的情形。
还应当进一步理解,在本申请说明书和所附权利要求书中使用的术语“和/或”是指相关联列出的项中的一个或多个的任何组合以及所有可能组合,并且包括这些组合。
在本文中,需要说明的是,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以具体情况理解上述术语在本发明中的具体含义。
另外,在本申请的描述中,术语“第一”、“第二”等仅用于区分描述,而不能理解为指示或暗示相对重要性。
参考说明书附图1至图21,本发明的优选实施例的可调弯导管,包括手柄10、导管20以及调弯线30。所述导管20的近端安装于所述手柄10,所述可调弯导管具有贯通所述手柄10和所述导管20的导引通道100,所述导管20具有近端主体段21和远端调弯段22,所述远端调弯段22位于所述近端主体段21的远端,并且所述远端调弯段22的硬度低于所述近端主体段21的硬度。所述调弯线30的远端固定于所述远端调弯段22,近端连接于所述手柄10,操作所述手柄10能够控制所述调弯线30调整所述远端调弯段22的弯曲角度,以最大轴向运动距离,设定所述远端调弯段22的最大转弯角度。
所述远端调弯段22进一步包括第一段221和第二段222。所述第二段222连接于所述近端主体段21的远端,所述第一段221连接于所述第二段222的远端,所述调弯线30可以是一条及以上,所述调弯线30的远端可以固定于所述第一段221的远端和/或所述第二段222的远端。
进一步地,所述第二段222的中轴线与所述近端主体段21的中轴线所在的平面为基准平面213,所述第一段221的远端能够被所述调弯线30拉动向远离所述基准平面213的方向运动。在弯折状态,所述第一段221的中轴线与所述基准平面213之间的夹角b的范围在10°~60°之间,优选在20°~50°之间。
优选地,在操作所述手柄10控制所述调弯线30调整所述远端调弯段22弯曲的过程中,所述远端调弯段22的远端与所述近端主体段21之间的夹角范 围在在一定三维范围内变化,能够满足多种角度调整的需求。
本申请所提供的所述可调弯导管优选适于穿过血管建立向左心耳植入器械的通道,还能够作为向人体的其他组织实施介入手术的通道,所述可调弯导管的具体应用场景不应当构成对本申请的限制。
在其中一种使用场景中,所述可调弯导管的所述导管20的远端适于经由下腔静脉进入右心房,通过心房间隔达到左心房后,所述导管20的远端置于左心耳附近的植入位置。所述下腔静脉至所述心房间隔之间有大致为锐角的夹角,心房间隔穿刺点与左心耳口之间的方位角度,因个体差异范围更大,因此所述可调弯导管的远端需要进行导航角度设置,以使其更有效率到达左心耳口,并与左心耳口呈同轴状态,同时需兼顾操作安全性。在本申请中,在所述导管20的远端通过心房间隔后,操作者能够操作所述手柄10以合理速度调整所述远端调弯段22的角度,调整所述导管20的远端与植入位置的同轴状态,使得器械自所述导管20的远端推出后能够以较为适配的状态植入预设位置,提高植入效率。
所述远端调弯段22的远端设有固定元件23,所述调弯线30的远端固定于所述固定元件23。优选地,所述固定元件23是固定于所述远端调弯段22的金属环。可选地,所述固定元件23与所述远端调弯段22一体成型。
所述远端调弯段22具有一定的弹性,在受到所述调弯线30的拉力作用时,所述远端调弯段22向近端弯曲,在所述调弯线30的拉力消失后,所述远端调弯段22恢复自然形态。
优选地,所述调弯线30自所述固定元件23沿着所述导管20呈直线状态向近端延伸,并与所述导管20的近端一起连接于所述手柄10。参考图5,在一变形实施方式中,所述调弯线30沿所述导管20的轴向方向呈曲线延伸,能够在所述调弯线30受到外部拉力时,更容易将拉力沿所述导管20的径向分散,使得所述远端调弯段22能够形成更为柔和的弯曲状态。
所述调弯线30能够承受的拉力在5N以上。优选地,所述调弯线30是金属丝。
进一步地,所述导管20包括内层导管241和外层导管242。所述调弯线30可活动地安装于所述内层导管241和所述外层导管242之间。
所述远端调弯段22对应的所述外层导管242的硬度是35D~55D,所述近端主体段21对应的所述外层导管242的硬度是55D~75D,所述远端调弯段22和所述近端主体段21对应的所述内层导管241的硬度相同,从而所述远端调弯段22的硬度低于所述近端主体段21的硬度。
参考图6,在一变形实施方式中,所述导管20还包括位于所述内层导管241和所述外层导管242之间的加强层243,所述远端调弯段22对应的所述加强层243的硬度低于所述近端主体段21对应的所述加强层243的硬度。
优选地,所述加强层243包括有序缠绕于所述内层导管241的外侧壁的金属丝,所述远端调弯段22对应的所述金属丝的密度低于所述近端主体段21对应的所述金属丝的密度,使得所述远端调弯段22对应的所述加强层243的硬度低于所述近端主体段21对应的所述加强层243的硬度。
参考图6和图7,在经所述导管的轴线的平面投影中,所述近端主体段对应的所述金属丝之间沿径向的夹角小于60°,优选不大于45°,金属丝之间的节距较小,金属丝在径向的支撑力较大,形成高硬度区段;在经所述导管的轴线的平面投影中,所述远端调弯段对应的所述金属丝之间的夹角大于60°,优选大于90°,金属丝之间的节距较大,金属丝在径向的支撑力降低,形成低硬度区段。在一变形实施方式中,仅在所述近端主体段对应的所述内层导管241和所述外层导管242之间设置所述加强层243。参考图7,在另一变形实施方式中,所述近端主体段21对应的所述加强层243的所述金属丝的层数多于所述远端调弯段22对应的所述金属丝的层数。示例地,所述加强层243包括内层弹簧2431和外层缠绕丝2432,在所述近端主体段21和所述远端调弯段22 的外侧均覆盖有所述内层弹簧2431,所述外层缠绕丝2432仅缠绕于所述近端主体段21的外侧。
优选地,所述调弯线30位于所述加强层243和所述内层导管241之间。可选地,在一变形实施方式中,所述调弯线30还能够位于所述加强层243的外侧,位于所述加强层243和所述外层导管242之间。
参考图8,在一变形实施方式中,所述第二段222可以具有固定的弯曲度,并且所述第二段的中轴线与所述近端主体段21的中轴线之间可以具有第一预设夹角a。所述第一预设夹角a的范围在30°~60°之间,优选在40°~45°之间。所述近端主体段21的远端设有所述第二段222,通过转动所述近端主体段21即可改变所述第一段21的角度。
参考图9,所述第一段221的远端既能够被拉动向所述基准平面213的左侧运动,也能够被拉动向所述基准平面213的右侧运动,在一变形实施方式中只能够向其中的一侧运动。优选地,所述第一段221弯折后,所述第一段221的中轴线与所述基准平面213之间的夹角b的范围在10°~60°之间,优选在20°~50°之间。
需要指出的是,所述第一段221也可以具有一定预设弯曲角度,所述预定弯曲角度远离所述基准平面213,范围满足所述夹角b的要求,叠加所述调弯线30产生的弯折后,满足所述夹角b的要求。如此设置,能够进一步提高所述调弯导管的调弯效率。
参考图11,在所述远端调弯段22的所述第一段221处于初始状态时,也即伸直状态时,所述第一段221的中轴线位于所述基准平面213,所述调弯线30固定于所述第一段221的远端,所述调弯线30的远端端点与所述第一段221的中轴线所在的平面与所述基准平面213之间具有第二预设夹角c,所述第二预设夹角c的范围在0~90°之间。由于所述调弯线30的远端固定于所述第一段221的位置不是位于与所述基准平面213的距离最大处,在所述第一段221 的远端受到所述调弯线30的拉力作用时实际作用于所述第一段221的拉力有所减小,能够避免所述第一段221的远端弯曲角度过快,提高操作过程的稳定性,降低误伤心内组织的风险。
所述第一预设夹角a和所述第二预设夹角c大致呈负相关的关系,所述第一预设夹角a增加,所述第二预设夹角c减小;所述第一预设夹角a减小,所述第二预设夹角c增加。将所述第一预设夹角a和所述第二预设夹角c设置为大致呈负相关的关系,能够有助于实现所述远端调弯段22的远端与植入位置的同轴状态。
参考图12,在一变形实施方式中,所述调弯线30的数量是两条,在所述远端调弯段22处于初始状态时,两条所述调弯线30的远端端点位于所述基准平面203的两侧,二者可以相对于所述基准平面203对称设置。通过两条所述调弯线30能够带动所述远端调弯段20向两个不同的方向弯折,满足多种调弯需求。可选地,在一些变形实施方式中,所述调弯线30的数量还能够是三条或者四条,以进一步增加所述远端调弯段20的调弯方向,所述调弯线30的具体数量不应当构成对本申请的限制。
参考图13,在一变形实施方式中,所述第一段221和所述第二段222均能够调弯。所述调弯线30包括第一调弯线31和第二调弯线32,所述第一调弯线31的远端固定于所述第一段221的远端,所述第二调弯线32的远端固定于所述第二段222的远端。在本变形实施方式中,所述第一段221和所述第二段222均能够弯曲,能够使得所述远端调弯段22的角度调整更加灵活。在使用过程中,操作者能够先向近端拉动所述第二调弯线32,控制所述第二段222开始弯曲预设的角度;然后向近端拉动所述第一调弯线31,控制所述第一段221开始弯曲预设的角度,以调整所述第一段221的远端与植入位置的同轴度。
参考图14,进一步地,在所述远端调弯段22处于初始状态时,所述第一调弯线31的远端、所述第二调弯线32的远端与所述远端调弯段22的中轴线 之间的连线之间的夹角d的范围在30°~150°之间,优选在60°~120°之间。当所述第二段222处于调弯状态时,所述第二段222的中轴线与所述近端主体段21的中轴线之间的夹角范围在30°~150°之间。
需要指出的是,在部分实施例中,所述第二段222可以具有一定预设角度,所述第一段221也可以具有一定预设角度。如此设置,能够进一步提高所述调弯导管的调弯效率。所述第一段221和所述第二段222是否具有预设角度,不应当对本发明形成限制。
进一步地,所述第一段221的硬度小于所述第二段222的硬度,所述第二段222的硬度小于所述近端主体段21的硬度。具体地,所述第一段221的硬度在35D~55D之间,所述第二段222的硬度在55~65D之间,所述近端主体段21的硬度在65D以上。
所述第一段221的远端设有第一固定元件231,所述第二段222的远端设有第二固定元件232,所述第一调弯线31的远端固定于所述第一固定元件231,所述第二调弯线32的远端固定于所述第二固定元件232。
参考图15和图16,进一步地,所述手柄10包括手柄主体11、容接机构12以及调弯拉线操作机构13。参考图2和图3,所述调弯拉线操作机构13的数量能够是一个也能够是两个,还能够是三个以上,所述调弯拉线操作机构13的具体数量不应当构成对本申请的限制。所述手柄主体11具有安装空间111和活动孔112,所述活动孔112与所述安装空间111连通;所述容接机构12安装于所述手柄主体11的近端。所述调弯线操作机构13包括内置活动块131和外置拨动件132,所述内置活动块131安装于所述安装空间111,所述外置拨动件132可转动地安装于所述手柄主体11的侧壁,并且所述外置拨动件132的至少一部分穿过所述活动孔112与所述内置活动块131螺纹配合连接,转动所述外置拨动件132能够带动所述内置活动块131沿所述安装空间111的轴向方向运动。所述内置活动块131具有固定部1311,所述调弯线30的近端固定于 所述固定部1311;所述内置活动块131具有导管穿孔1312,所述导管20的近端穿过所述导管穿孔1312,所述导管20的近端固定于所述容接机构12。所述远端调弯段22在调弯状态,有恢复自然状态的趋势,恢复趋势对所述拉线30所产生的拉力,不足以驱动所述内置活动块131与所述外置拨动件132相对运动,即所述远端调弯段22在调弯状态,需要有外力转动所述外置拨动件132,才会恢复调弯前的自然状态。
在使用过程中,操作者转动所述外置拨动件132能够控制所述内置活动块131在所述安装空间111中沿其轴向方向运动,以带动所述调弯线30移动,调整所述远端调弯段22的角度,操作简便。
优选地,所述外置拨动件132和所述内置活动块131之间通过四头螺纹配合连接,能够较大地增加调弯效率,可以设置为所述外置拨动件132旋转二分之一周以内即能够控制所述远端调弯段22调整至最大弯曲角度。可选地,所述外置拨动件132和所述内置活动块131之间还能够通过普通螺纹、二头螺纹或是三头螺纹配合连接,所述外置拨动件132和所述内置活动块131之间的具体螺纹配合连接方式不应当构成对本申请的限制。
参考图16和图17,所述手柄10还包括间隔安装于所述安装空间111的第一限位杆141和第二限位杆142;所述内置活动块131具有间隔设置的第一限位槽151和第二限位槽152,所述第一限位杆141安装于所述第一限位槽151,所述第二限位杆142安装于所述第二限位槽152,所述内置活动块131能够沿着所述第一限位杆141和所述第二限位杆142滑动。在转动所述外置拨动件132控制所述内置活动块131轴向移动的过程中,所述第一限位杆141和所述第二限位杆142能够作为所述内置活动块131滑动的导轨,另一方面,间隔设置的所述第一限位杆141和所述第二限位杆142还能够防止所述内置活动块131跟随所述外置拨动件132转动,提高所述内置活动块131轴向移动的稳定性。
具体地,所述第一限位槽151和所述第二限位槽152位于所述内置活动块 131的内壁并与所述导管穿孔1312连通。当所述第一限位杆141安装于所述第一限位槽151、所述第二限位杆142安装于所述第二限位槽152、所述导管20安装于所述导管穿孔1312后,所述导管20位于所述第一限位杆141和所述第二限位杆142之间。可选地,在一些变形实施方式中,所述第一限位槽151和所述第二限位槽152分别位于所述内置活动块131的外侧壁,所述第一限位杆141和所述第二限位杆142分别安装于所述安装空间111的内壁。
进一步地,所述手柄10还包括安装于所述手柄主体11的远端的支撑机构16,所述第一限位杆141和所述第二限位杆142的远端分别固定于所述支撑机构16,近端分别固定于所述容接机构12。所述支撑机构16不仅能够为所述第一限位杆141和所述第二限位杆142提供支撑,还能够为所述导管20提供支撑。
参考图17,所述内置活动块131的所述固定部1311具有容纳槽133,所述容纳槽133的远端侧壁和近端侧壁分别具有与所述容纳槽133连通的远端穿线孔134和近端穿线孔135,所述调弯线30的近端依次穿过所述远端穿线孔134、所述容纳槽133以及所述近端穿线孔135。所述手柄10还包括封堵塞17,所述封堵塞17具有容线槽170,所述封堵塞17安装于所述容纳槽133,所述调弯线30的近端位于所述容线槽170中,转动所述封堵塞17能够改变所述容线槽170中的所述调弯线30与所述远端穿线孔134中的所述调弯线30之间的角度,优选为90°,以张紧所述调弯拉线30,使所述调弯拉线30的近端不移动。
优选地,所述封堵塞17的直径略大于所述容纳槽133的直径,所述封堵塞17通过过盈配合的方式固定于所述容纳槽133中。可选地,所述封堵塞17还能够通过胶粘或者焊接的方式固定于所述容纳槽133中,所述封堵塞17的具体安装方式不应当构成对本申请的限制。
进一步地,所述调弯线操作机构13的数量是两个以上,分别对应连接于 两个以上的所述调弯线30的近端,分别用于将所述远端调弯段22的远端向不同的方向弯曲。
参考图15、图16以及图19,进一步地,所述手柄10还包括安装于所述容接机构12的近端的止血阀18。
参考图20,所述容接机构12具有远端容纳槽121、近端容纳槽122以及连通通道123,所述连通通道123连通所述远端容纳槽121和所述近端容纳槽122。所述导管20的近端固定于所述远端容纳槽121,所述止血阀18安装于所述容接机构12的近侧,所述止血阀18的远端面开设有螺旋槽180,所述容接机构12的近端可转动地安装于所述螺旋槽180。所述螺旋槽180的内壁形成推进部181,所述推进部181与所述连通通道123之间设置有阻流件182,所述阻流件182具有阻流孔(图中未示出),所述阻流孔与所述连通通道123相连通,转动所述止血阀18带动所述推进部181向远端运动并挤压所述阻流件182,所述阻流孔闭合,所述近端容纳槽122与所述远端容纳槽121隔断。
所述连通通道123的径向尺寸小于所述近端容纳槽122的径向尺寸,所述连通通道123的侧壁形成台阶限位结构,抵接于所述阻流件182,以对所述阻流件182进行限位。
参考图21,具体地,所述止血阀18包括外侧支撑臂183和内侧支撑臂184,所述外侧支撑臂183和所述内侧支撑臂184间隔设置,两者之间的间隙形成所述螺旋槽180。所述内侧支撑臂184的远端安装于所述容接机构12的所述近端容纳槽122内,并且所述内侧支撑臂184的远端形成所述推进部181。
所述阻流件182由弹性材料制作而成,弹性材料包括但不限于硅胶、软质PVC、TPE或TPR等。当所述止血阀18位于所述容接机构12的近端时,所述推进部181与所述连通通道123之间的距离大于所述阻流件182的轴向宽度;当相对于所述容接机构12转动所述止血阀18使得所述容接机构12的近端运动至所述螺旋槽180的底部时,所述推进部181与所述连通通道123之间的距离 小于所述阻流件182的轴向宽度,所述阻流件182受到挤压而变形,并向径向方向扩张闭合所述阻流孔。
参考图19,所述手柄10进一步包括安装于所述容接机构12并与所述连通通道连通的冲洗接头19。需要指出的是,在所述阻流孔闭合后,连通所述导管20的通路被切断,此时通过所述冲洗接头19能够对所述连通通道123和所述导管20进行冲洗、输送药物等操作。
参考图21,所述止血阀18的所述螺旋槽180的外壁具有与所述螺旋槽180连通的限位槽185,所述限位槽185的远端具有第一限位臂186、近端具有第二限位臂187,所述容接机构12的近端外侧壁具有径向向外延伸的第三限位臂188,所述第三限位臂188延伸进入所述限位槽185。换句话说,所述外侧支撑臂183的内侧面形成所述限位槽185。
在所述止血阀18相对于所述容接机构12转动,并且在所述容接机构12上移动时,所述第三限位臂188能够与所述第一限位臂186、所述第二限位臂187配合在轴向上限位。当所述第一限位臂186抵接于所述第三限位臂188时,所述推进部181与所述连通通道123之间的距离较大,所述阻流件182的所述阻流孔处于开启状态;当所述第二限位臂187抵接于所述第三限位臂188时,所述推进部181与所述连通通道123之间的距离较小,所述阻流件182的所述阻流孔处于闭合状态。
参考图20,所述止血阀18进一步包括压覆件189。所述压覆件189安装于所述近端容纳槽122中,并且所述压覆件189位于所述推进部181与所述阻流件182之间,所述压覆件189的中间位置具有对应所述阻流孔的通孔。所述压覆件189由相对刚性的材料制作而成,举例但不限于医疗级的改性尼龙材料。所述压覆件189用于辅助所述推进部181有效地压缩所述阻流件182。
所述容接机构12的远端外侧面与远端面之间的连接处具有倒角。在所述容接机构12的远端设置倒角能够减少所述容接机构12对人体造成机械损伤, 所述倒角既可以是圆弧形倒角也能够是斜倒角。
应当说明的是,上述实施例均可根据需要自由组合。以上仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以作出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。

Claims (19)

  1. 可调弯导管,其特征在于,包括:
    手柄;
    导管,所述导管的近端安装于所述手柄,所述可调弯导管具有贯通所述手柄和所述导管的导引通道,所述导管具有近端主体段和远端调弯段,所述远端调弯段包括第一段和第二段,所述第二段连接于所述近端主体段的远端,所述第一段连接于所述第二段的远端,并且所述远端调弯段的硬度低于所述近端主体段的硬度;
    调弯线,所述调弯线的远端固定于所述远端调弯段,近端连接于所述手柄,操作所述手柄能够控制所述调弯线调整所述远端调弯段的弯曲角度。
  2. 根据权利要求1所述的可调弯导管,其特征在于,所述第二段的中轴线与所述近端主体段的中轴线所在的平面为基准平面,所述第一段的远端能够被所述调弯线拉动向远离所述基准平面的方向运动,所述第一段弯折后,所述第一段的中轴线与所述基准平面之间的夹角范围在10°~60°之间。
  3. 根据权利要求2所述的可调弯导管,其特征在于,在所述第一段处于初始状态时,所述第一段的中轴线位于所述基准平面,所述调弯线固定于所述第一段的远端,所述调弯线的远端端点与所述第一段的中轴线所在的平面与所述基准平面之间具有第二预设夹角,所述第二预设夹角的范围在0~90°之间。
  4. 根据权利要求3所述的可调弯导管,其特征在于,所述调弯线的数量是两条,在所述第一段处于初始状态时,两条所述调弯线的远端端点位于所述基准平面的两侧,并且相对于所述基准平面对称设置。
  5. 根据权利要求2所述的可调弯导管,其特征在于,所述调弯线包括第一调弯线和第二调弯线,所述第一调弯线的远端固定于所述第一段的远端,所述第二调弯线的远端固定于所述第二段的远端;
    在所述远端调弯段处于初始状态时,所述第一调弯线的远端、所述第二调弯线的远端与所述导管的中轴线之间的连线之间的夹角范围在30°~150°之间;
    当所述第二段处于调弯状态时,所述第二段的中轴线与所述近端主体段的中轴线之间的夹角范围在30°~150°之间。
  6. 根据权利要求5所述的可调弯导管,其特征在于,所述第一段的硬度在35D~55D之间,所述第二段的硬度在55~65D之间,所述近端主体段的硬度在75D以上。
  7. 根据权利要求3或5所述的可调弯导管,其特征在于,所述第二段的中轴线与所述近端主体段的中轴线之间具有第一预设夹角,所述第一预设夹角的范围在30°~60°之间。
  8. 根据权利要求1-6中任一项所述的可调弯导管,其特征在于,所述手柄包括:
    手柄主体,具有安装空间和活动孔,所述活动孔与所述安装空间连通;
    容接机构,安装于所述手柄主体的近端;
    调弯线操作机构,包括内置活动块和外置拨动件,所述内置活动块安装于所述安装空间,所述外置拨动件可转动地安装于所述手柄主体的侧壁,并且所述外置拨动件的至少一部分穿过所述活动孔与所述内置活动块螺纹配合连接,转动所述外置拨动件能够带动所述内置活动块沿所述安装空间的轴向方向运动;
    所述内置活动块具有固定部,所述调弯线的近端固定于所述固定部;
    所述内置活动块具有导管穿孔,所述导管的近端穿过所述导管穿孔,所述导管的近端固定于所述容接机构。
  9. 根据权利要求8所述的可调弯导管,其特征在于,所述手柄还包括间隔安装于所述安装空间的第一限位杆和第二限位杆;所述内置活动块具有间隔设置的第一限位槽和第二限位槽,所述第一限位杆安装于所述第一限位槽,所述第二限位杆安装于所述第二限位槽,所述内置活动块能够沿着所述第一限位杆和所述第二限位杆滑动。
  10. 根据权利要求9所述的可调弯导管,其特征在于,所述第一限位槽和所述第二限位槽位于所述内置活动块的内壁并与所述导管穿孔连通。
  11. 根据权利要求10所述的可调弯导管,其特征在于,所述手柄还包括安装于所述手柄主体的远端的支撑机构,所述第一限位杆和所述第二限位杆的远端分别固定于所述支撑机构,近端分别固定于所述容接机构。
  12. 根据权利要求8所述的可调弯导管,其特征在于,所述内置活动块的所述固定部具有容纳槽,所述容纳槽的远端侧壁和近端侧壁分别具有与所述容纳槽连通的远端穿线孔和近端穿线孔,所述调弯线的近端依次穿过所述远端穿线孔、所述容纳槽以及所述近端穿线孔;
    所述手柄还包括封堵塞,所述封堵塞具有容线槽,所述封堵塞安装于所述容纳槽,所述调弯线的近端位于所述容线槽中,转动所述封堵塞能够改变所述容线槽中的所述调弯线与所述远端穿线孔中的所述调弯线之间的角度。
  13. 根据权利要求8所述的可调弯导管,其特征在于,所述调弯线操作机 构的数量是两个以上。
  14. 根据权利要求1-5、9-13中任一项所述的可调弯导管,其特征在于,所述导管包括内层导管和外层导管,所述调弯线可活动地安装于所述内层导管和所述外层导管之间。
  15. 根据权利要求14所述的可调弯导管,其特征在于,所述导管还包括位于所述内层导管和所述外层导管之间的加强层,所述远端调弯段对应的所述加强层的硬度低于所述近端主体段对应的所述加强层的硬度。
  16. 根据权利要求15所述的可调弯导管,其特征在于,所述加强层包括有序缠绕于所述内层导管的外侧壁的金属丝,所述远端调弯段对应的所述金属丝的密度低于所述近端主体段对应的所述金属丝的密度。
  17. 根据权利要求16所述的可调弯导管,其特征在于,在经所述导管的轴线的平面投影中,所述近端主体段对应的所述金属丝之间的夹角小于60°,所述远端调弯段对应的所述金属丝之间的夹角大于60°。
  18. 根据权利要求16所述的可调弯导管,其特征在于,所述近端主体段对应的所述加强层的所述金属丝的层数多于所述远端调弯段对应的所述金属丝的层数。
  19. 根据权利要求1-5、9-13中任一项所述的可调弯导管,其特征在于,所述调弯线沿所述导管的轴向方向呈曲线延伸。
PCT/CN2022/113541 2022-06-13 2022-08-19 可调弯导管 WO2023240787A1 (zh)

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