CN120227220A - A guide head structure and conveying system - Google Patents

A guide head structure and conveying system Download PDF

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Publication number
CN120227220A
CN120227220A CN202311865544.XA CN202311865544A CN120227220A CN 120227220 A CN120227220 A CN 120227220A CN 202311865544 A CN202311865544 A CN 202311865544A CN 120227220 A CN120227220 A CN 120227220A
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CN
China
Prior art keywords
guide
head structure
section
guide head
sheath
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CN202311865544.XA
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Chinese (zh)
Inventor
毛一明
陈琦深
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Lifetech Scientific Shenzhen Co Ltd
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Lifetech Scientific Shenzhen Co Ltd
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Priority to CN202311865544.XA priority Critical patent/CN120227220A/en
Publication of CN120227220A publication Critical patent/CN120227220A/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
    • A61F2/9522—Means for mounting a stent or stent-graft onto or into a placement instrument

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

本发明涉及一种引导头结构及输送系统，所述引导头结构包括引导段以及主体段，所述引导段的近端与所述主体段的远端平滑过渡连接，当所述引导头结构受到外力作用时，所述引导段和所述主体段中至少一段可产生形变，使得所述引导头结构的最大外径大于所述引导头结构自然状态下的最大外径。输送系统包括鞘管、鞘芯以及引导头结构，所述引导头结构还包括包覆段，所述包覆段与所述主体段的近端连接，所述鞘芯远端与所述包覆段连接，所述鞘管套设在所述鞘芯上，且所述鞘管可相对所述鞘芯以及所述引导头结构运动，所述鞘管远端可朝所述引导头运动并包住所述包覆段。本发明可避免引导头结构刮伤血管壁，提高产品使用安全。

The present invention relates to a guide head structure and a delivery system, wherein the guide head structure comprises a guide section and a main body section, wherein the proximal end of the guide section is smoothly transitionally connected to the distal end of the main body section, and when the guide head structure is subjected to an external force, at least one of the guide section and the main body section can be deformed, so that the maximum outer diameter of the guide head structure is greater than the maximum outer diameter of the guide head structure in a natural state. The delivery system comprises a sheath tube, a sheath core, and a guide head structure, wherein the guide head structure further comprises a covering section, wherein the covering section is connected to the proximal end of the main body section, and the distal end of the sheath core is connected to the covering section, wherein the sheath tube is sleeved on the sheath core, and the sheath tube can move relative to the sheath core and the guide head structure, and the distal end of the sheath tube can move toward the guide head and cover the covering section. The present invention can prevent the guide head structure from scratching the blood vessel wall, thereby improving the safety of product use.

Description

Guide head structure and conveying system
Technical Field
The invention relates to the field of interventional medicine, in particular to a guide head structure and a conveying system.
Background
Under the development of medical instrument industry, a new treatment technology, namely a blood vessel cavity treatment technology, is developed clinically, the blood vessel cavity interventional treatment belongs to minimally invasive treatment, the incision is smaller, related instruments can be guided into a lesion area through arterial puncture, and then the stent is released, so that the treatment effect is achieved. The treatment has less trauma to the patient, less influence on the human body functions, less complication of the patient and quicker postoperative recovery.
The interventional instrument must be additionally provided with consideration of bending performance when the delivery sheath passes through the vessel arch, guiding performance of a guide head at the front end of the delivery sheath, anti-displacement performance required to be carried by the delivery system when the stent is released, and the like. The tip head structure at the front end of the conveyor is designed to have good guiding performance and cannot be too long and narrow. In the treatment of Stanford a aortic dissection patients, because the breach lesion occurs in the ascending main area of the aorta, the length of the area is limited, if the tip at the front end of the sheath tube of the conveyor is designed to be too long and narrow, the aortic valve can be damaged, and the blood reflux phenomenon at the aortic valve can be caused during operation, and if the tip at the front end of the sheath tube of the conveyor is designed to be too short, the whole stent delivery system can not be smoothly guided to move in the bending section of the arterial vessel, and the stent can not be delivered to the lesion position of the ascending main or arch section of the vessel.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a novel guide head structure and a conveying system.
The technical problem to be solved by the invention is to provide a guide head structure, which comprises a guide section and a main body section, wherein the proximal end of the guide section is in smooth transition connection with the distal end of the main body section, and when the guide head structure is subjected to external force, at least one section of the guide section and the main body section can deform, so that the maximum outer diameter of the guide head structure is larger than the maximum outer diameter of the guide head structure in a natural state.
In some embodiments of the present invention, the main body section is cut along an axial direction to form a plurality of first through grooves and a plurality of deformed main bodies spaced apart by the first through grooves, the plurality of first through grooves and the deformed main bodies are alternately and uniformly arranged in a circumferential direction of the main body section, the first through grooves penetrate through an inner surface and an outer surface of the main body section, the plurality of deformed main bodies can be deformed through the plurality of first through grooves, and a bending portion bending to an outer side or an inner side of the deformed main body is arranged on the deformed main body.
In some embodiments of the invention, the tube wall of the guide section is configured in a wave-like folded configuration to form a shortened configuration, the shortened configuration being disposed at the distal end of the guide section.
In some embodiments of the invention, the inner wall of the guide section is provided with wavy concavities and convexities to form a shortened structure, and the shortened structure extends from the proximal end to the distal end of the guide section.
The technical problem to be solved by the invention is to provide a conveying system for conveying medical equipment to a lesion area in interventional therapy, the conveying system comprises a sheath tube, a sheath core and a guide head structure as set forth in any one of the above, the guide head structure further comprises a coating section, the coating section is connected with the proximal end of the main body section, the distal end of the sheath core is connected with the coating section, the sheath tube is sleeved on the sheath core, the sheath tube can move relative to the sheath core and the guide head structure, and the distal end of the sheath tube can move towards the guide head structure and coat the coating section.
In some embodiments of the present invention, the distal end of the guiding section is provided with a second through slot penetrating the inner and outer surfaces of the guiding section, the guiding section is provided with a tearing slot between two adjacent second through slots, the tearing slot penetrates the inner and outer surfaces of the guiding section, the delivery system further comprises a pulling structure movable relative to the guiding head structure, the pulling structure comprises a pulling body and a clamping structure, the clamping structure is arranged at the distal end of the pulling structure, the pulling body penetrates the second through slots to enable the clamping structure to be arranged at the inner side of the guiding section, and the size of the clamping structure is larger than that of the second through slot.
In some embodiments of the present invention, the pulling structure further includes a sleeve, the sleeve is coaxially disposed with the sheath tube and the sheath core, the sleeve can move relative to the sheath tube, the guide head structure and the sheath core, the sleeve is sleeved on the sheath tube, or the sleeve is sleeved on the sheath core and is accommodated in the sheath tube, and the second through slot is provided with a damping structure.
In some embodiments of the present invention, the proximal end of the pulling body is connected to the sleeve, the sleeve moves proximally to drive the pulling body to move proximally, the pulling body moves to drive the detent structure to move proximally, and the detent structure can abut against the inner surface of the guiding section when moving proximally, so that the guiding section deforms proximally along the tearing groove from the distal end.
In some embodiments of the present invention, a receiving cavity penetrating from the proximal end to the distal end of the sheath is provided in the sheath, or the delivery system further includes a delivery tube, where the delivery tube is disposed on an inner wall or an outer wall of the sheath, and the delivery tube is disposed along a length direction of the sheath.
In some embodiments of the present invention, the proximal end of the pulling body enters from the distal end of the accommodating cavity or the conveying pipe body and passes out from the proximal end of the accommodating cavity or the conveying pipe body, the pulling body is pulled to move the pulling body proximally, the pulling body moves to further drive the clamping structure to move proximally, and the clamping structure can abut against the inner surface of the guiding section when moving proximally, so that the guiding section starts to deform proximally along the tearing groove from the distal end.
Compared with the prior art, the guide head structure and the conveying system have the advantages that the support performance of the deformation main body is weaker due to the first through groove, so that when the guide head structure contacts the blood vessel wall, the deformation main body deforms towards the outer side direction of the guide head structure. Therefore, the force of the guide head structure against the vessel wall is converted into the elastic potential energy of deformation generated by the deformation main body, so that the force of the guide head structure against the vessel wall is removed, the guide head structure is prevented from scratching the vessel wall, and the use safety of the product is improved. Meanwhile, the guide head structure does not need to be reduced in length, and the anti-displacement performance and the like of the guide head structure are not affected, so that the guide head structure can not only avoid scratching the vessel wall in the conveying process, but also give consideration to the anti-displacement performance of the guide head structure, and further greatly improve the product performance and the use safety.
Drawings
Fig. 1 is a schematic perspective view of a guide head according to a first embodiment of the present invention.
Fig. 2 is a schematic diagram of a structure after compression deformation of a guide head structure according to a first embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view of a guide head structure according to a first embodiment of the present invention.
Fig. 4 is a schematic perspective view of another embodiment of a guide head structure according to the first embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of another embodiment of a guide head structure according to the first embodiment of the present invention.
Fig. 6 is a schematic perspective view of another embodiment of a guide head structure according to the first embodiment of the present invention.
Fig. 7 is a schematic diagram of a conveying system according to a second embodiment of the present invention and a guiding head structure of a first embodiment.
Fig. 8 is a schematic diagram showing a configuration of a guide head of a conveying system according to a second embodiment of the present invention and a third embodiment of the present invention.
Fig. 9 is a schematic diagram showing a guiding section and a pulling structure of a guiding head structure according to a third embodiment of the present invention.
Fig. 10 is an enlarged view at a in fig. 8.
Fig. 11 is a schematic view showing a state of change of the structure of the guide head of the conveying system according to the second embodiment and the third embodiment of the present invention.
Fig. 12 is a schematic diagram showing a separated state of a guide section and a pulling structure of a guide head structure according to a third embodiment of the present invention.
Fig. 13 is a schematic view of a prior art guide head structure and delivery system delivering to the aortic arch.
Fig. 14 is a schematic view of a third embodiment of the present invention with the guide head structure and delivery system delivered to the aortic arch.
Fig. 15 is a schematic cross-sectional view of a conveying system according to a second embodiment of the present invention and a guide head according to a third embodiment of the present invention.
The attached drawings are used for identifying and describing:
100. Guide head structure, 11, guide section, 12, main body section, 121, first through groove, 122, deformation main body, 111, guide wire cavity, 1221, bending part, 112, shortening structure, 200, conveying system, 21, sheath tube, 22, sheath core, 23, pulling structure, 13, cladding section, 300, guide head structure, 321, second through groove, 31, guide section, 32, main body section, 312, tearing groove, 231, pulling main body, 232, clamping structure, 233, sleeve, 313 and gear structure.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.
For purposes of more clarity in describing the structure of the present application, the terms "proximal" and "distal" are defined herein as terms commonly used in the interventional medical arts. Specifically, "distal" means an end far from the operator during a surgical operation, "proximal" means an end near the operator during a surgical operation, "axial" means a length direction thereof, and "radial" means a direction perpendicular to the "axial".
Referring to fig. 1 and 2, a first embodiment of the present invention provides a guide head structure 100, where the guide head structure 100 is used in a catheter, a sheath or a conveyor that is used for establishing a path, conveying medical devices, etc. in interventional therapy, and provides guiding and anti-displacement properties for the catheter, the sheath, the conveyor, etc. In the first embodiment of the present invention, the guide head structure 100 is exemplified by a transporter for transporting a vascular stent, and will be described in detail.
The guide head structure 100 includes a guide section 11 and a main body section 12, wherein the proximal end of the guide section 11 is in smooth transition connection with the distal end of the main body section 12. The body section 12 is cut along the axial direction to form a plurality of first through grooves 121 and a plurality of deformed bodies 122 which are arranged at intervals by the first through grooves 121, the plurality of first through grooves 121 and the deformed bodies 122 are alternately and uniformly arranged in the circumferential direction of the body section 12, and the first through grooves 121 penetrate through the inner surface and the outer surface of the body section 12. When the guide head structure 100 is pressed in the axial direction, the deformation bodies 122 can deform through the first through grooves 121.
Specifically, referring to fig. 3, the guide section 11 and the main body section 12 are hollow structures, the guide section 11 and the main body section 12 have a guide wire cavity 111 that is in communication, the guide wire cavity 111 is for a guide wire to pass through, and the guide head structure 100 can move to a lesion position along a path established by the guide wire. The guiding section 11 has a truncated cone-shaped structure, and the outer diameter of the guiding section 11 gradually decreases from the proximal end to the distal end of the guiding section 11, so that the guiding section 11 can play a guiding role. The proximal end of the guide section 11 is in smooth transition connection with the distal end of the main body section 12, so as to ensure that the outer surface of the guide head structure 100 is smooth and flat, and avoid the guide head structure 100 from scratching the vessel wall. In an embodiment of the present invention, the body section 12 is cut from the proximal end to the distal end, and the cutting direction is an axial direction, so that a plurality of first through grooves 121 penetrating the inner and outer surfaces of the body section 12 are cut. After the proximal end portion of the main body section 12 is cut and removed, the deformed main body 122 alternately arranged with the plurality of first through grooves 121 is formed, that is, the plurality of first through grooves 121 and the deformed main body 122 are arranged in the circumferential direction of the main body section 12 in such a manner that one deformed main body 122 is arranged adjacent to one first through groove 121 in the clockwise direction, another first through groove 121 is arranged adjacent to the deformed main body 122 in the clockwise direction, and another deformed main body 122 is arranged adjacent to the other first through groove 121 in the clockwise direction, and so on. At the same time, the first through grooves 121 and the deformation bodies 122 are uniformly arranged in the circumferential direction of the body section 12. When the guiding head structure is pushed in the blood vessel to meet the blood vessel with larger bending amplitude, the distal end of the guiding head structure is propped against the blood vessel wall on the large bending side of the blood vessel due to the fact that the bending amplitude of the blood vessel is too large, and the guiding head structure has certain supporting property and hardness, so that the guiding head structure can scratch the blood vessel. In the present invention, by providing the guide head structure 100, when the guide head structure 100 is abutted against the vessel wall on the side of the large curve of the vessel, the guide head structure 100 is axially compressed because the guide head structure 100 receives the abutment force of the vessel wall and the pushing force pushing the guide head structure 100, and the abutment force and the pushing force are forces in opposite directions. At this time, since the guide head structure 100 is provided with the first through groove 121, the support performance of the deformation body 122 is weak, and thus the deformation body 122 is deformed in the outer direction of the guide head structure 100, as shown in fig. 2. Therefore, the force of the guiding head structure 100 against the vessel wall will be converted into the elastic potential energy of the deformation body 122, so as to remove the force of the guiding head structure 100 against the vessel wall, thereby avoiding the guiding head structure 100 from scratching the vessel wall and improving the safety of the product. Meanwhile, since the above arrangement does not require the guide head structure 100 to be reduced in length, and the anti-displacement performance and the like of the guide head structure 100 are not affected, the guide head structure 100 not only can avoid scratching the vessel wall during the conveying process, but also can give consideration to the anti-displacement performance of the guide head structure 100, thereby greatly improving the product performance and the use safety.
The length of the first through groove 121 may be adaptively set according to the actual use situation, for example, the length of the first through groove 121 may be adaptively reduced when there is no substantial bending in the blood vessel through which the guide head structure 100 passes, and the length of the first through groove 121 may be adaptively increased when there is substantial bending in the blood vessel through which the guide head structure 100 passes. The first through groove 121 may be provided at a position adaptively according to a direction in which the blood vessel is bent, and if the blood vessel through which the guide head structure 100 passes is bent only to one side, the first through groove 121 may be provided only to one side of the main body section 12.
With continued reference to fig. 1, the deformation body 122 is provided with a bending portion 1221 that bends toward the outer side or the inner side of the deformation body 122. Specifically, when the deformation body 122 is provided with the bending portion 1221 bending toward the outer side of the deformation body 122, the guiding head structure 100 abuts against the vessel wall to enable the deformation body 122 to receive the axial compression force, the bending portion 1221 bending toward the outer side can ensure that the deformation body 122 bends and deforms toward the outer side of the deformation body 122, so as to ensure that the deformation body 122 can generate deformation with larger deformation amount, and avoid the deformation body 122 bending and deforming toward the inner side, which results in insufficient deformation amount generated by the deformation body 122 and incapability of smoothly passing through the vessel. When the guide head structure 100 is small in the bending width of the blood vessel, a bending portion 1221 that bends inward of the deformation body 122 may be provided in the deformation body 122. When the guiding head structure 100 abuts against the vessel wall, the deformation body 122 deforms inwards to a certain extent, so that the guiding head structure 100 can adaptively bend along the bending direction of the vessel, and the guiding head structure 100 can smoothly pass through the bent vessel.
Further, referring to fig. 4 to 6, in the first embodiment of the present invention, in order to further reduce the risk of the guide head structure 100 scratching the vessel wall, the inner wall of the guide section 11 is provided with a wavy concave-convex structure to form a shortened structure 112, and the shortened structure 112 extends from the proximal end to the distal end of the guide section 11. The thickness of the wall thickness of the guide section 11 is varied by providing the inner wall of the guide section 11 with a shortened structure 112. When the distal end of the guiding section 11 abuts against the vessel wall, the short shrinkage structure 112 deforms after being stressed, the position of the guiding section 11 with the thicker wall bulges outwards, the position of the guiding section 11 with the thinner wall bulges inwards, and the guiding section 11 is entirely shrunk to form a fold, as shown in fig. 6, so that the force of the distal end of the guiding section 11 abutting against the vessel wall is dispersed by the process of the guiding section 11 being entirely shrunk, thereby avoiding the guiding section 11 from scratching the vessel wall.
In other embodiments of the present invention, the distal end of the guiding section 11 may be directly configured into a pleated shape as shown in fig. 6, specifically, the tube wall of the guiding section 11 is configured to be folded in a wave shape to form a shortened structure 112, and the shortened structure 112 itself is configured into a pleated structure, and the shortened structure 112 is disposed at the distal end of the guiding section 11. When the distal end of the guiding section 11 abuts against the vessel wall, the short shrinkage structure 112 deforms after being stressed, that is, the whole short shrinkage structure 112 compresses in the axial direction, so that the force of the distal end of the guiding section 11 abutting against the vessel wall is dispersed on the short shrinkage structure 112, and the guiding section 11 is prevented from scratching the vessel wall.
Referring to fig. 7, a second embodiment of the present invention provides a delivery system 200 for delivering a medical device to a lesion area in an interventional procedure, the delivery system 200 includes a sheath 21, a sheath core 22, and a guide head structure 100 according to the first embodiment of the present invention, the guide head structure 100 further includes a covering section 13, and the covering section 13 is connected to a proximal end of the main body section 12. The distal end of the sheath core 22 is connected with the cladding section 13, the sheath tube 21 is sleeved on the sheath core 22, the sheath tube 21 can move relative to the sheath core 22 and the guiding head structure 100, and the distal end of the sheath tube 21 can move towards the guiding head structure 100 and cladding the cladding section 13.
When the distal end of the sheath 21 covers the covering section 13, the proximal end of the covering section 13, the outer surface of the sheath core 22, and the inner surface of the sheath 21 together form a loading section of the stent, and the stent is compressively loaded in the loading section. When it is desired to release the stent, the sheath 21 can be retracted to expose the stent to the sheath 21, thereby allowing deployment and release. The delivery system further comprises a handle by which the movement of the sheath 21 is controlled.
Referring to fig. 8 to 10, a third embodiment of the present invention provides a guide head structure 300 and a conveying system, and the conveying system of the third embodiment of the present invention can directly employ the conveying system 200 of the second embodiment. The guide head structure 300 is mainly different from the guide head structure 100 according to the first embodiment of the present invention in that a second through groove 321 is provided in a manner that the distal end of the guide section 31 extends proximally, and the second through groove 321 is disposed on the inner and outer surfaces of the guide section 31. The guide section 31 is provided with a tearing groove 312 between two adjacent second through grooves 321, that is, one tearing groove 312 is provided between every two adjacent second through grooves 321, and the tearing groove 312 penetrates through the inner and outer surfaces of the guide section 31. Further, the delivery system 200 further comprises a pulling structure 23, the pulling structure 23 is movable relative to the guiding head structure 300, and the pulling structure 23 comprises a pulling body 231 and a clamping structure 232. The detent structure 232 is disposed at the distal end of the pulling structure 23, the pulling body 231 passes through the distal end of the second through slot 321, and then the pulling body 231 moves proximally a small distance, so that the pulling body 231 abuts against the inner wall of the second through slot 321, the detent structure 232 is disposed inside the guiding section 31, and the size of the detent structure 232 is larger than that of the second through slot 321.
It should be noted that, in the third embodiment of the present invention, the locking structure 232 is a spherical structure, the diameter of the locking structure 232 is larger than the width of the first through slot 321, so that the locking structure 232 can be locked inside the guiding section 31, that is, the locking structure 232 cannot pass through the second through slot 321 because the size of the locking structure 232 is larger than the size of the second through slot 321.
Further, the pulling structure 23 further comprises a cannula 233, and the proximal end of the pulling body 231 is connected to the cannula 233. The sleeve 233 is coaxially disposed with the sheath 21 and the sheath core 22, and the sleeve 233 is movable relative to the sheath 21, the guide head structure 100, and the sheath core 22, i.e., the sleeve 233 can be independently controlled. In the third embodiment of the present invention, the cannula 233 is sleeved on the sheath 21, and the cannula 233 is movable along the length direction of the sheath 21 outside the sheath 21. When the guide head structure 100 moves into the curved blood vessel, the cannula 233 can be moved proximally to pull the pulling body 231 to move proximally, and the pulling body 231 can be moved to drive the clamping structure 232 to move proximally. Since the dimension of the detent structure 232 is larger than the dimension of the second through groove 321, when the detent structure 232 moves proximally, the detent structure 232 abuts against the inner surface of the guide section 31, and the force exerted by the detent structure 232 on the inner surface of the guide section 31 causes the guide section 31 to have a tendency to flip outwardly. When the force of pulling the pulling body 231 proximally is large enough, the guiding section 31 is bent proximally along the tearing groove 312 from the distal end, so that the guiding section 31 is deformed into a petal shape, as shown in fig. 11, and the harder and sharper distal end of the guiding section 31 is deformed into a smoother structure, thereby avoiding the guiding section 31 from scratching the vessel wall. Meanwhile, since the guide section 31 is deformed into a petal shape, the guide section 31 has good deformability, and when the guide section 31 contacts the vessel wall, the guide section 31 can be deformed so as to reduce the damage to the vessel wall. Meanwhile, the guide head structure 300 of the third embodiment of the present invention is particularly suitable for a stent for delivering an aortic arch. As shown in fig. 13, when the stent of the aortic arch is delivered, the existing guide head structure may be poked to the aortic valve due to the close proximity of the aortic arch and the aortic valve, thereby causing damage to the aortic valve. In contrast, after the guide head structure 300 of the third embodiment of the present invention deforms the guide segments 31 into petal shapes, the axial length of the guide head structure 300 can be reduced, so as to avoid the guide head structure 300 from being poked into the aortic valve, as shown in fig. 14.
It should be noted that, the distal ends of the guide sections 31 between two adjacent tearing grooves 312 are turned proximally and outwardly along the length directions of the two tearing grooves 312, and the plurality of tearing grooves 312 are uniformly disposed in the circumferential direction of the guide sections 31, so that the distal ends of the guide sections 31 are uniformly turned around to deform, and meanwhile, the force acting on the distal ends of the guide sections 31 is ensured to be uniform, so that the force acting on one side of the distal ends of the guide sections 31 is prevented from being excessively large, and the whole guide sections 31 are bent. When the distal end of the guiding section 31 turns over and deforms more than 90 degrees, the pulling structure 23 continues to move proximally, the pulling body 231 can move along the second through slot 321 towards the distal end of the second through slot 321, and finally the pulling body 231 slides off from the distal end of the second through slot 321, so that the pulling body 231 and the clamping structure 232 are separated from the guiding section 31, as shown in fig. 12. At this point, the pulling structure 23 is continued to be retracted to move the pulling structure 23 away from the region where the stent is released, thereby avoiding the pulling structure 23 from affecting the release of the stent. The pulling structure 23 may be withdrawn from the human body together with the sheath 21, or the pulling structure 23 may be withdrawn from the human body alone.
It should be noted that, in the third embodiment of the present invention, the second through groove 321 is disposed at the distal end of the guiding section 31, and the second through groove 321 does not extend into the proximal end of the guiding section 31 or the main body section 32, so as to ensure that the locking structure 232 is locked at the distal end of the guiding section 31, so as to ensure that the pulling structure 23 can easily pull the distal end of the guiding section 31, and the guiding section 31 can easily turn over proximally and outwards along the length directions of the two tearing grooves 312. The tearing groove 312 has a smaller width, thereby securing the support and strength of the distal end of the guide section 31. The length of the tearing groove 312 may be adaptively set according to the actual situation, for example, the length of the tearing groove 312 may be adaptively reduced when there is no substantial bending in the blood vessel through which the guide head structure 300 passes, and the length of the tearing groove 312 may be adaptively increased when there is substantial bending in the blood vessel through which the guide head structure 300 passes. Meanwhile, in order to avoid that the pulling body 231 slides out of the second through slot 321 too easily, the distal end of the guiding section 31 cannot be deformed. The damping structure is disposed in the second through slot 231 from the slot wall, the damping structure may be silica gel, the damping structure may also be an elastic member with good elasticity, and when the pulling main body 231 slides in the second through slot 231, the damping structure will increase the resistance of the pulling structure relative to the sliding of the second through slot 231, so as to avoid that the pulling main body 231 slides out from the second through slot 321 too easily.
Referring to fig. 15, in other embodiments of the present invention, the cannula 233 may be sleeved on the sheath core 22 and received in the sheath 21, where the cannula 233 moves in the lumen of the sheath 21, so as to ensure that the cannula 233 does not scratch the vessel wall during movement. The proximal end of the cannula 233 may be connected to a handle, and the movement of the cannula 233 may be controlled by operating the handle.
In other embodiments of the present invention, the cannula 233 may be omitted, a receiving cavity extending through the proximal end to the distal end of the sheath 21 may be provided in the sheath 21, and the proximal end of the pulling body 231 may be inserted into and out of the distal end of the receiving cavity. By pulling the proximal end of the pulling body 231, the pulling structure 23 moves proximally in the accommodating cavity relative to the sheath 21, the pulling structure 23 moves to drive the clamping structure 232 to move proximally, and the clamping structure 232 can abut against the inner surface of the guiding section 31 when moving proximally, so that the guiding section 31 deforms proximally along the tearing groove 312 from the distal end. The sheath 21 is provided with a receiving cavity for receiving the pulling structure 23, so as to ensure that the overall size of the distal end of the delivery system 200 is smaller, so that the delivery system 200 is easier to enter the human body and can adapt to more complex vascular paths. At the same time, the pulling structure 23 is prevented from contacting the vessel wall during the movement, and the risk of scratching the vessel wall by the pulling structure 23 is avoided.
In other embodiments of the present invention, the sleeve 233 may be omitted, and a delivery tube may be disposed on the inner wall or the outer wall of the sheath 21, and disposed along the length of the sheath 21. The proximal end of the pull body 231 is fed in from the distal end of the delivery tube and passes out from the proximal end of the delivery tube. By pulling the proximal end of the pulling body 231, the pulling structure 23 moves proximally in the delivery tube body relative to the sheath 21, the pulling structure 23 moves to drive the clamping structure 232 to move proximally, and the clamping structure 232 can abut against the inner surface of the guiding section 31 when moving proximally, so that the guiding section 31 deforms proximally along the tearing groove 312 from the distal end. The conveying pipe body can be fixed with the sheath pipe 21 in a hot melting mode, and the conveying pipe body for the pulling structure 23 to pass through is directly arranged on the sheath pipe 21, so that the whole manufacturing difficulty and the manufacturing cost of the conveying system can be reduced.
Compared with the prior art, the guide head structure and the conveying system have the advantages that the support performance of the deformation main body is weaker due to the second through groove, so that the deformation main body deforms towards the outer side direction of the guide head structure when the guide head structure contacts the blood vessel wall. Therefore, the force of the guide head structure against the vessel wall is converted into the elastic potential energy of deformation generated by the deformation main body, so that the force of the guide head structure against the vessel wall is removed, the guide head structure is prevented from scratching the vessel wall, and the use safety of the product is improved. Meanwhile, the guide head structure does not need to be reduced in length, and the anti-displacement performance and the like of the guide head structure are not affected, so that the guide head structure can not only avoid scratching the vessel wall in the conveying process, but also give consideration to the anti-displacement performance of the guide head structure, and further greatly improve the product performance and the use safety.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the invention, but any modifications, equivalents, improvements, etc. within the principles of the present invention should be included in the scope of the present invention.

Claims (10)

1.一种引导头结构，其特征在于：所述引导头结构包括引导段以及主体段，所述引导段的近端与所述主体段的远端平滑过渡连接，当所述引导头结构受到外力作用时，所述引导段和所述主体段中至少一段可产生形变，使得所述引导头结构的最大外径大于所述引导头结构自然状态下的最大外径。1. A guide head structure, characterized in that: the guide head structure comprises a guide section and a main body section, the proximal end of the guide section is smoothly transitionally connected to the distal end of the main body section, and when the guide head structure is subjected to external force, at least one section of the guide section and the main body section can be deformed, so that the maximum outer diameter of the guide head structure is larger than the maximum outer diameter of the guide head structure in a natural state. 2.如权利要求1所述的引导头结构，其特征在于：在所述主体段上沿轴向方向进行切割形成多个第一通槽以及被所述第一通槽间隔设置的多个形变主体，多个所述第一通槽以及所述形变主体交替且均匀设置在所述主体段的周向上，所述第一通槽贯通所述主体段的内外表面，多个所述形变主体可通过多个所述第一通槽产生形变；所述形变主体上设置有向所述形变主体外侧或内侧弯曲的弯曲部。2. The guide head structure as described in claim 1 is characterized in that: a plurality of first through grooves and a plurality of deformation bodies spaced apart by the first through grooves are cut along the axial direction on the main body segment, the plurality of first through grooves and the deformation bodies are alternately and evenly arranged in the circumferential direction of the main body segment, the first through grooves pass through the inner and outer surfaces of the main body segment, and the plurality of deformation bodies can be deformed through the plurality of first through grooves; a bending portion bending toward the outside or inside of the deformation body is provided on the deformation body. 3.如权利要求1所述的引导头结构，其特征在于：所述引导段的管壁呈波浪形折叠设置形成短缩结构，所述短缩结构设置在所述引导段的远端。3. The guide head structure according to claim 1, characterized in that the tube wall of the guide section is folded in a wave shape to form a shortened structure, and the shortened structure is arranged at the distal end of the guide section. 4.如权利要求1所述的引导头结构，其特征在于：所述引导段的内壁呈波浪形凹凸设置形成短缩结构，所述短缩结构由所述引导段的近端延伸至远端。4. The guide head structure according to claim 1, characterized in that the inner wall of the guide section is arranged in a wave-shaped concave-convex manner to form a shortened structure, and the shortened structure extends from the proximal end to the distal end of the guide section. 5.一种输送系统，用于介入治疗中输送医疗器械至病变区域，其特征在于：所述输送系统包括鞘管、鞘芯以及如权利要求1-4中任一项所述的引导头结构，所述引导头结构还包括包覆段，所述包覆段与所述主体段的近端连接，所述鞘芯远端与所述包覆段连接，所述鞘管套设在所述鞘芯上，且所述鞘管可相对所述鞘芯以及引导头结构运动，所述鞘管远端可朝所述引导头结构运动并包覆所述包覆段。5. A delivery system for delivering medical devices to a diseased area during interventional treatment, characterized in that: the delivery system comprises a sheath, a sheath core and a guide head structure as described in any one of claims 1 to 4, the guide head structure also comprising a covering segment, the covering segment is connected to the proximal end of the main body segment, the distal end of the sheath core is connected to the covering segment, the sheath is sleeved on the sheath core, and the sheath can move relative to the sheath core and the guide head structure, and the distal end of the sheath can move toward the guide head structure and cover the covering segment. 6.如权利要求5所述的输送系统，其特征在于：所述引导段远端设置有贯通所述引导段内外表面的第二通槽，所述引导段在相邻的两个第二通槽之间设置有撕裂槽，所述撕裂槽贯通所述引导段的内外表面，所述输送系统还包括拉动结构，所述拉动结构可相对所述引导头结构运动，所述拉动结构包括拉动主体以及卡位结构，所述卡位结构设置在所述拉动结构的远端，所述拉动主体穿过所述第二通槽使所述卡位结构设置在所述引导段的内侧，且所述卡位结构的尺寸大于所述第二通槽的尺寸。6. The conveying system as described in claim 5 is characterized in that: a second through groove penetrating the inner and outer surfaces of the guide segment is provided at the distal end of the guide segment, and a tearing groove is provided between two adjacent second through grooves of the guide segment, and the tearing groove penetrates the inner and outer surfaces of the guide segment, and the conveying system also includes a pulling structure, and the pulling structure can move relative to the guide head structure, and the pulling structure includes a pulling body and a locking structure, and the locking structure is arranged at the distal end of the pulling structure, and the pulling body passes through the second through groove so that the locking structure is arranged on the inner side of the guide segment, and the size of the locking structure is larger than the size of the second through groove. 7.如权利要求6所述的输送系统，其特征在于：所述拉动结构还包括套管，所述套管与所述鞘管以及所述鞘芯同轴设置，所述套管可相对所述鞘管、所述引导头结构以及所述鞘芯运动，所述套管套设在所述鞘管上，或所述套管套设在所述鞘芯上并收纳在所述鞘管内；所述第二通槽内设置有阻尼结构。7. The conveying system as described in claim 6 is characterized in that: the pulling structure also includes a sleeve, the sleeve is coaxially arranged with the sheath tube and the sheath core, the sleeve can move relative to the sheath tube, the guide head structure and the sheath core, the sleeve is sleeved on the sheath tube, or the sleeve is sleeved on the sheath core and housed in the sheath tube; a damping structure is arranged in the second through groove. 8.如权利要求7所述的输送系统，其特征在于：所述拉动主体的近端与所述套管连接，所述套管朝近端运动进而带动所述拉动主体朝近端运动，所述拉动主体运动进而带动所述卡位结构朝近端移动，所述卡位结构朝近端移动时可抵持所述引导段的内表面，进而使所述引导段由远端开始沿着所述撕裂槽向近端产生形变。8. The conveying system as described in claim 7 is characterized in that: the proximal end of the pulling body is connected to the sleeve, the sleeve moves toward the proximal end and thus drives the pulling body to move toward the proximal end, the movement of the pulling body further drives the locking structure to move toward the proximal end, and the locking structure can abut against the inner surface of the guide section when moving toward the proximal end, thereby causing the guide section to deform from the distal end along the tear groove toward the proximal end. 9.如权利要求6所述的输送系统，其特征在于：所述鞘管内设置有贯通所述鞘管近端至远端的收容腔，或所述输送系统还包括输送管体，所述输送管体设置在所述鞘管的内壁或外壁上，且所述输送管体沿所述鞘管的长度方向设置。9. The delivery system as described in claim 6 is characterized in that: a receiving cavity is provided in the sheath tube and passes through the proximal end to the distal end of the sheath tube, or the delivery system also includes a delivery tube body, the delivery tube body is arranged on the inner wall or outer wall of the sheath tube, and the delivery tube body is arranged along the length direction of the sheath tube. 10.如权利要求9所述的输送系统，其特征在于：所述拉动主体的近端由所述收容腔或所述输送管体的远端进入，并从所述收容腔或所述输送管体的近端穿出，拉动所述拉动主体的近端使所述拉动主体朝近端运动，所述拉动主体运动进而带动所述卡位结构朝近端移动，所述卡位结构朝近端移动时可抵持所述引导段的内表面，进而使所述引导段由远端开始沿着所述撕裂槽向近端产生形变。10. The conveying system as described in claim 9 is characterized in that: the proximal end of the pulling body enters from the receiving cavity or the distal end of the conveying tube body, and passes through the receiving cavity or the proximal end of the conveying tube body, and the proximal end of the pulling body is pulled to make the pulling body move toward the proximal end, and the movement of the pulling body then drives the locking structure to move toward the proximal end, and the locking structure can abut against the inner surface of the guide section when moving toward the proximal end, thereby causing the guide section to deform from the distal end along the tear groove to the proximal end.
CN202311865544.XA 2023-12-29 2023-12-29 A guide head structure and conveying system Pending CN120227220A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311865544.XA CN120227220A (en) 2023-12-29 2023-12-29 A guide head structure and conveying system

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Application Number Priority Date Filing Date Title
CN202311865544.XA CN120227220A (en) 2023-12-29 2023-12-29 A guide head structure and conveying system

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CN120227220A true CN120227220A (en) 2025-07-01

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CN202311865544.XA Pending CN120227220A (en) 2023-12-29 2023-12-29 A guide head structure and conveying system

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