Artery stent conveying device

Abstract

The utility model provides an arterial stent conveying device, and belongs to the field of medical instruments. The conveying device comprises an operating handle, a plurality of first indicating marks and a plurality of second indicating marks, wherein the operating handle is uniformly surrounded by a circle; a plurality of second indication marks are uniformly embedded in the tube wall, far away from the tail end of the operating handle, of the outer sheath in a circle, and the second indication marks are matched and correspond to the first indication marks; a fixed handle; and an inner core. According to the conveying device, the positioning accuracy can be improved when an arterial stent is conveyed, positioned and released, the relative position of the stent and a branch blood vessel inlet can be visually recognized and aligned through the corresponding first indication mark and the second indication mark, and the accuracy of an in-vitro fenestration operation is greatly improved. Moreover, the first indication mark and the second indication mark which correspond to each other provide a simple and intuitive mode for a doctor to determine the windowing position, so that the operation process is simplified, and the dependence on advanced imaging equipment is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of medical apparatus and instruments, and particularly relates to an arterial stent delivery device. BACKGROUND

[0002] Vascular endovascular intervention surgery, especially aortic endovascular stent repair (EVAR / TEVAR), is an important means of treating aortic diseases. This kind of surgery repairs aortic aneurysm or aortic dissection by placing a stent in the aorta, thereby avoiding the high risk of open or thoracotomy surgery and the long postoperative recovery time. However, these surgeries face a major challenge: how to isolate the lesion while preserving important branch blood vessels and maintaining their blood flow. The ex situ fenestration technique emerged as the times require, which enables surgeons to maintain the blood flow of key branch blood vessels such as the brachiocephalic trunk, left subclavian artery, left common carotid artery, celiac trunk, superior mesenteric artery, etc. by creating openings on the stent while placing the aortic stent. Although the ex situ fenestration technique greatly enhances the applicability and success rate of EVAR / TEVAR surgery, the accurate implementation of this technique still faces significant challenges.

[0003] The primary challenge lies in the precise positioning of the ex situ fenestration location. Due to the complexity of aortic anatomy and individual differences among patients, accurately positioning the entrance of branch blood vessels and performing ex situ fenestration on the corresponding location of the stent requires extremely high precision and operating skills. Current techniques mainly rely on image guidance and surgical experience, but these methods still have limitations. Current stent delivery systems lack effective visual markers to guide precise fenestration. Without direct guidance, the operator must rely on experience and speculation of the anatomical structure to determine the fenestration location, which not only increases the difficulty of the surgery but also increases the risk of postoperative complications.

[0004] Therefore, developing a device and method that can improve the accuracy of ex situ fenestration positioning is of great significance for improving the safety, effectiveness, and success rate of EVAR / TEVAR surgery. SUMMARY

[0005] The utility model is carried out in order to solve the above-mentioned problem, aims at providing an arterial stent delivery device.

[0006] The utility model provides a kind of arterial stent delivery device, with such features, for the arterial stent graft needed in calibration stent orientation in interventional operation, it include: operating handle, it is evenly surrounded a circle to be equipped with a plurality of first indication mark thereon;Sheath, for the tubular structure with good bending degree and rigidity, sheath is coaxially fixed connection with operating handle, sheath is driven coaxially by operating handle and the relative rotation between the two does not occur, sheath is evenly surrounded a circle to be embedded with a plurality of second indication mark in the pipe wall of the end away from operating handle, second indication mark is matched with first indication mark corresponding;Fixed handle, the end of operating handle away from sheath is relatively displaceablely mutually sleeved along axial direction;And inner core, it is set on fixed handle, from the region of fixed handle and operating handle mutually sleeved and is passed through operating handle and sheath, inner core has soft conical guide head in the end of passing out sheath, wherein, the central axis direction of fixed handle and inner core has through guide wire channel, for the elongated guide wire to be passed through, guide wire is used to guide inner core and sheath to enter patient artery specified position, inner core is sleeved with arterial stent graft below the end with guide head, and arterial stent graft is located between inner core and sheath, when guide head reaches the set region of patient artery, by pulling operating handle and making it displace relative to fixed handle, it can drive sheath to retreat relative to inner core, to make arterial stent graft between sheath and inner core release and be fixed in the set region of patient artery.

[0007] In the arterial stent delivery device provided by the utility model, the first indication mark can also have the following features: the number of the first indication mark is 24.

[0008] In the arterial stent delivery device provided by the utility model, the first indication mark can also have the following features: the first indication mark comprises any one or more of a protrusion, a groove or a smearing mark.

[0009] In the arterial stent delivery device provided by the utility model, the second indication mark can also have the following features: the number of the second indication mark is 4, 6 or 12, and the second indication mark is indicated by the first indication mark.

[0010] In the arterial stent delivery device provided by the utility model, the second indication mark can also have the following features: the second indication mark comprises any one or more of a three-dimensional distinguishable Roman numeral, an Arabic numeral, a letter or a geometric body of different shapes.

[0011] In the arterial stent delivery device provided by the utility model, the second indication mark can also have the following features: the second indication mark is made of a material that is not transparent to X-rays.

[0012] In the arterial stent delivery device, the operating handle comprises: a handle part, which is a hollow cylindrical handle, wherein an inner core channel penetrating up and down is arranged at the axis, the inner core channel is used for allowing the inner core to pass through, the radial inner diameter of the handle part is r1, the radial outer diameter is R, one end of the handle part is connected with an outer sheath; an extension part, which is a hollow cylindrical structure, is arranged at the other end of the handle part and coaxial with the handle part, the radial inner diameter of the extension part is r2, the radial outer diameter is R, and r2>r1, the height of the extension part is not less than the length of the arterial stent graft; and a limiting part is arranged at the end of the extension part, and the limiting part is protruded inward along the radial direction of the extension part.

[0013] In the arterial stent delivery device, the operating handle comprises: a handle part, which is a hollow cylindrical handle, wherein an inner core channel penetrating up and down is arranged at the axis, the inner core channel is used for allowing the inner core to pass through, the radial inner diameter of the handle part is r1, the radial outer diameter is R, one end of the handle part is connected with an outer sheath; an extension part, which is a hollow cylindrical structure, is arranged at the other end of the handle part and coaxial with the handle part, the radial inner diameter of the extension part is r2, the radial outer diameter is R, and r2>r1, the height of the extension part is not less than the length of the arterial stent graft; and a limiting part is arranged at the end of the extension part, and the limiting part is protruded inward along the radial direction of the extension part.

[0014] In the arterial stent delivery device, the operating handle comprises: a handle part, which is a hollow cylindrical handle, wherein an inner core channel penetrating up and down is arranged at the axis, the inner core channel is used for allowing the inner core to pass through, the radial inner diameter of the handle part is r1, the radial outer diameter is R, one end of the handle part is connected with an outer sheath; an extension part, which is a hollow cylindrical structure, is arranged at the other end of the handle part and coaxial with the handle part, the radial inner diameter of the extension part is r2, the radial outer diameter is R, and r2>r1, the height of the extension part is not less than the length of the arterial stent graft; and a limiting part is arranged at the end of the extension part, and the limiting part is protruded inward along the radial direction of the extension part.

[0015] In the arterial stent delivery device, the operating handle comprises: a handle part, which is a hollow cylindrical handle, wherein an inner core channel penetrating up and down is arranged at the axis, the inner core channel is used for allowing the inner core to pass through, the radial inner diameter of the handle part is r1, the radial outer diameter is R, one end of the handle part is connected with an outer sheath; an extension part, which is a hollow cylindrical structure, is arranged at the other end of the handle part and coaxial with the handle part, the radial inner diameter of the extension part is r2, the radial outer diameter is R, and r2>r1, the height of the extension part is not less than the length of the arterial stent graft; and a limiting part is arranged at the end of the extension part, and the limiting part is protruded inward along the radial direction of the extension part.

[0016] The utility model has the advantages of simple structure, convenient operation, high safety and reliability, and the like.

[0017] The utility model relates to an arterial stent conveying device for conveying the arterial stent graft needed to calibrate the position of the arterial stent in the interventional operation, because include: operating handle, a circle of first indication mark is evenly arranged on it, sheath, the tubular structure with good bending degree and rigidity, sheath and operating handle coaxial fixed connection, sheath is driven by operating handle and rotates coaxially and will not rotate relatively between both, a circle of second indication mark is embedded evenly in the pipe wall of the end of sheath away from operating handle, and the second indication mark is matched with the first indication mark, fixed handle, the end of operating handle away from sheath can be relatively displacedly intercalated along the axial direction, and the inner core is arranged on fixed handle, extends out from the region of fixed handle and operating handle intercalation and is worn through operating handle and sheath, the inner core has the soft conical guide head at the end of wearing through sheath, wherein, the fixed handle and the central axis direction of inner core have the guide wire channel through, are used for the guide wire to be worn through, and the guide wire is used for guiding the inner core and sheath to enter the specified position of patient artery, the arterial stent graft is intercalated below the end with guide head of inner core, and the arterial stent graft is located between inner core and sheath, when guide head reaches the set region of patient artery, by pulling operating handle and making it relatively displace fixed handle, can drive sheath to retreat relatively to inner core, to make the arterial stent graft between sheath and inner core release and be fixed in the set region of patient artery.

[0018] Therefore, the arterial stent conveying device can improve positioning accuracy when conveying and positioning the arterial stent, doctors can intuitively identify and align the relative position of the stent and the branch vessel inlet through the corresponding first indication mark and second indication mark, greatly improving the accuracy of the in-vitro fenestration surgery. Moreover, the corresponding first indication mark and second indication mark provide a simple and intuitive way for doctors to determine the fenestration position, simplifying the surgical process and reducing the dependence on advanced imaging equipment. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the structure schematic view of the arterial stent conveying device of the embodiment of the utility model,

[0020] Figure 2 is the sectional schematic view of the arterial stent conveying device of the embodiment of the utility model at operating handle and fixed handle,

[0021] Figure 3 is the sectional schematic view of the arterial stent conveying device of the embodiment of the utility model at guide head,

[0022] Figure 4 is the sectional schematic view of operating handle of the embodiment of the utility model,

[0023] Figure 5 yes Figure 1 Enlarged view of region A in the middle;

[0024] Figure 6 yes Figure 1 Enlarged view of region B in the middle;

[0025] Figure 7 yes Figure 6 Corresponding partial cross-sectional view;

[0026] Figure 8 This is a cross-sectional schematic diagram of the fixed handle according to an embodiment of the present invention. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments, in conjunction with the accompanying drawings, provide a detailed description of an arterial stent delivery device of this utility model.

[0028] <Example>

[0029] Figure 1 This is a schematic diagram of the structure of an arterial stent delivery device according to an embodiment of the present invention; Figure 2 This is a cross-sectional schematic diagram of the arterial stent delivery device according to an embodiment of the present invention at the operating handle and the fixed handle; Figure 3 This is a cross-sectional schematic diagram of the arterial stent delivery device at the guide head according to an embodiment of the present invention.

[0030] like Figures 1 to 3 As shown, this embodiment provides an arterial stent delivery device 100, including an operating handle 10, an outer sheath 20, a fixing handle 30, and an inner core 40.

[0031] The operating handle 10 includes a handle part 11, an extension part 12, and a limiting part 13, all three of which are integrally molded.

[0032] Figure 4 This is a cross-sectional schematic diagram of the operating handle according to an embodiment of the present invention.

[0033] like Figures 1 to 4 As shown, the handle part 11 is a hollow cylindrical handle, in which there is an inner core channel 11a that runs vertically through the axis. The radial inner diameter of the handle part 11 is denoted as r1, and the radial outer diameter is denoted as R.

[0034] Figure 5 yes Figure 1 A magnified view of region A in the middle.

[0035] like Figures 1 to 5As shown, the handle part 11 is uniformly surrounded by 24 first indicating marks 11b of X-ray opaque material, and the 24 first indicating marks 11b are respectively marked with 24 different character marks (the specific character marks are not shown in the figure).

[0036] The extension part 12 is a hollow cylindrical structure, arranged at the bottom of the handle part 11 and coaxial with the handle part 11, the radial inner diameter of the extension part is r2 and r2>r1, and the radial outer diameter is R, and the height of the extension part is h1.

[0037] The limiting part 13 is arranged at the bottom of the extension part 12 and is a hollow ring structure, and the limiting part 13 is protruded inward along the radial direction of the extension part 12, and the radial outer diameter of the limiting part 13 is R.

[0038] The outer sheath 20 is a tubular structure with good bending degree and rigidity, and the outer sheath 20 is fixedly connected with the top of the handle part 11 coaxially and communicates with the inner core channel 11a, and the outer sheath 20 is driven to rotate coaxially with the handle part 11 and cannot rotate relatively.

[0039] Figure 6 is Figure 1 An enlarged view of the B area; Figure 7 is Figure 6 A corresponding partial cross-sectional view.

[0040] As Figures 1 to 7 shown, the outer sheath 20 is uniformly embedded with 12 second indicating marks 20a of X-ray opaque material in the pipe wall of the end away from the handle part 11, and the 12 second indicating marks 20a are matched with the 24 first indicating marks 11b.

[0041] Figure 8 is a cross-sectional view of a fixed handle of an embodiment of the utility model.

[0042] As Figures 1 to 8 shown, the fixed handle 30 includes a fixed part 31, a pulling part 32 and an abutting part 33, which are integrally designed.

[0043] The fixed part 31 is a cylindrical handle.

[0044] The pulling part 32 is protruded at the top of the fixed part 31, and the pulling part 32 is movably arranged in the space enclosed by the limiting part 13. In this embodiment, the length of the pulling part 32 is h1.

[0045] The abutting part 33 is radially protruded at the end of the pulling part 32, and when the pulling part 32 moves in the space enclosed by the limiting part 13, the abutting part 33 abuts on the limiting part 13, so that the operation handle 10 and the fixed handle 30 are prevented from being separated due to excessive pulling amplitude.

[0046] The inner core 40 is a tubular structure with good bending degree and rigidity, and is fixedly connected coaxially with the top of the pulling part 32. The inner core 40 passes through the inner core channel 11a and the outer sheath 20, and the end of the inner core 40 passing out of the outer sheath 20 has a soft conical guide head 40a. As shown in the figure, the guide head 40a of the inner core 40 is sleeved with the to-be-used arterial stent graft 60 with a length of h1 below. Figure 3

[0047] In the embodiment, the arterial stent graft 60 includes: a thoracic aortic stent including a main body straight cylinder stent, a single-branch stent and a multi-branch stent; an abdominal aortic stent including a main body stent, a branch stent, an AUI, a multi-branch stent and an IBD; and a peripheral vascular stent including a self-expanding bare stent and a self-expanding covered stent.

[0048] The fixed part 31, the pulling part 32, the abutting part 33 and the inner core 40 have a through guide wire channel m at the central axis.

[0049] The guide wire 50 passes through the guide wire channel m, and is used to guide the inner core 40 and the outer sheath 20 to pass into a designated position of an artery of a patient.

[0050] The use process of the arterial stent delivery device 100 is as follows:

[0051] Firstly, a puncture is made at an arterial access of a patient, and the guide wire 50 is used to enter the inside of the artery of the patient via the puncture access and to pass through a lesion position to be treated.

[0052] Then, the arterial stent delivery device 100 is delivered to a designated preset position under the guidance of the guide wire 50.

[0053] Finally, the handle part 11 is rotated to drive the outer sheath 20 to rotate coaxially, and under the observation of X-ray, the specific position of the second indication mark 20a is determined in combination with the 24 first indication marks 11b, so as to assist the doctor to accurately determine the position or windowing position of the arterial stent graft 60. When the required angle is reached, the handle 10 is displaced relative to the fixed handle 30 to drive the outer sheath 20 to retreat relative to the inner core 40, so that the arterial stent graft 60 between the outer sheath 20 and the inner core 40 is released and anchored in the set region of the artery of the patient.

[0054] Effects of the embodiment

[0055] ​The arterial stent delivery device provided by the embodiment is used for delivering the arterial stent graft which needs to be calibrated in the interventional operation, and includes: an operation handle, on which a plurality of first indicating marks are uniformly arranged in a circle; an outer sheath, which is a tubular structure with good bending degree and rigidity, and is fixedly connected with the operation handle in a coaxial manner, so that the outer sheath is driven to rotate coaxially by the operation handle and cannot rotate relatively with the operation handle, and a plurality of second indicating marks are embedded in the wall of the outer sheath at the end away from the operation handle in a circle, and the second indicating marks are matched with the first indicating marks; a fixed handle, which is coaxially and relatively displaceably sleeved with the end of the operation handle away from the outer sheath; and an inner core, which is arranged on the fixed handle, extends out of the region where the fixed handle and the operation handle are sleeved with each other and passes through the operation handle and the outer sheath, and has a soft conical guide head at the end passing out of the outer sheath, wherein the fixed handle and the inner core have a guide wire channel penetrating through the central axis direction of the fixed handle and the inner core, for passing an elongated guide wire therethrough, the guide wire is used for guiding the inner core and the outer sheath to enter a specified position of the patient's artery, the arterial stent graft is sleeved with the inner core below the end with the guide head, and the arterial stent graft is located between the inner core and the outer sheath, when the guide head reaches the specified region of the patient's artery, the outer sheath is retracted relative to the inner core by relatively displacing the operation handle relative to the fixed handle, so that the arterial stent graft between the outer sheath and the inner core is released and fixed in the specified region of the patient's artery.

[0056] Therefore, the arterial stent delivery device of the embodiment can improve the positioning accuracy when the arterial stent is delivered and released, and the doctor can intuitively identify and align the relative position of the stent and the branch vessel entrance through the corresponding first indicating marks and second indicating marks, thereby greatly improving the accuracy of the in-vitro fenestration operation. Moreover, the corresponding first indicating marks and second indicating marks provide a simple and intuitive way for the doctor to determine the fenestration position, simplify the operation process, and reduce the dependence on high-level imaging equipment.

[0057] Further, the number of the first indicating marks is 24 protrusions with digital painted marks, and the number of the second indicating marks is 12 solid distinguishable Roman numerals made of X-ray opaque material, and the second indicating marks are indicated by the corresponding first indicating marks. In this way, the first indicating marks can be indicated by the second indicating marks to indirectly determine the angle of the arterial stent graft arranged on the inner core in the outer sheath.

[0058] Further, the operation handle comprises: a handle part, which is a hollow cylindrical handle with an inner core channel penetrating up and down at the axis, the inner core channel is used for the inner core to pass through, the radial inner diameter of the handle part is r1, the radial outer diameter is R, one end of the handle part is connected with an outer sheath; an extension part, which is a hollow cylindrical structure, is arranged at the other end of the handle part and coaxial with the handle part, the radial inner diameter of the extension part is r2, the radial outer diameter is R, and r2>r1, the height of the extension part is not less than the length of the arterial stent graft; and a limiting part, which is arranged at the end of the extension part, and protrudes inward along the radial direction of the extension part. The fixed handle comprises: a fixed part, which is a cylindrical handle; a pulling part, which protrudes at one end of the fixed part, and the pulling part is movably arranged in the space enclosed by the limiting part; and an abutting part, which protrudes along the radial direction at the end of the pulling part, when the pulling part moves in the space enclosed by the limiting part, the abutting part abuts on the limiting part, so as to prevent the operation handle and the fixed handle from being separated due to too large pulling amplitude. In this way, the operator can release the arterial stent graft by pulling after reaching the specified position.

[0059] Further, the handle part, the extension part and the limiting part are designed in one piece, and the fixed part, the pulling part and the abutting part are designed in one piece. In this way, the operation handle and the fixed handle are more firm and not easy to be damaged.

[0060] Further, the arterial stent graft comprises: a thoracic aortic stent, which comprises a main body straight cylindrical stent, a single branch stent and a multi-branch stent; an abdominal aortic stent, which comprises a main body stent, a branch stent, an AUI, a multi-branch stent and an IBD; and a peripheral vascular stent, which comprises a self-expanding bare stent and a self-expanding covered stent. In this way, the arterial stent delivery device is suitable for delivering various arterial stent grafts which need to calibrate the position of the stent in the interventional operation.

[0061] Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An arterial stent delivery device, comprising: An arterial stent graft for delivering an arterial stent graft in an interventional procedure, wherein a stent position needs to be calibrated, comprises: an operation handle, which is uniformly provided with a plurality of first indicating marks; an outer sheath, which is a tubular structure with good bending degree and rigidity, and is coaxially fixedly connected with the operation handle, and is coaxially rotated with the operation handle and cannot relatively rotate with the operation handle, and is uniformly embedded with a plurality of second indicating marks in the tubular wall of the end away from the operation handle, and the second indicating marks are matched with the first indicating marks; a fixed handle, which is axially relatively displaceably sleeved with the end of the operation handle away from the outer sheath; and an inner core, which is provided on the fixed handle, extends out of the region where the fixed handle and the operation handle are sleeved with each other and penetrates through the operation handle and the outer sheath, and has a soft conical guide head at the end penetrating out of the outer sheath, wherein the fixed handle and the inner core have a through guide wire channel in the direction of the central axis, for penetrating the elongated guide wire, the guide wire is used for guiding the inner core and the outer sheath to the designated position of the patient's artery, the inner core is sleeved with the arterial stent graft below the end with the guide head, and the arterial stent graft is located between the inner core and the outer sheath, when the guide head reaches the set region of the patient's artery, the outer sheath is relatively retreated with the inner core by relatively displacing the operation handle with the fixed handle, so that the arterial stent graft between the outer sheath and the inner core is released and fixed in the set region of the patient's artery.

2. The arterial stent delivery device according to claim 1, wherein: wherein the number of the first indicating marks is 24.

3. The arterial stent delivery device according to claim 1 or 2, wherein: wherein the first indicating marks include any one or more of a protrusion, a groove or a smearing mark.

4. The arterial stent delivery device according to claim 2, wherein: wherein the number of the second indicating marks is 4, 6 or 12, the second indicating marks are indicated by the first indicating marks.

5. The arterial stent delivery device according to claim 1, wherein: wherein the second indicating marks include any one or more of a three-dimensional distinguishable Roman numeral, an Arabic numeral, a letter or a different shape of a geometric body.

6. The arterial stent delivery device according to claim 1, wherein: wherein the second indicating marks are made of a material that is not transparent to X-rays.

7. The arterial stent delivery device of claim 1, characterized in that: the operation handle includes: a handle part, which is a hollow cylindrical handle, and has an inner core channel penetrating through up and down in the axis, for penetrating the inner core, and the radial inner diameter of the handle part is denoted as r1, and the radial outer diameter is denoted as R, and one end of the handle part is connected with the outer sheath. an extension part, which is a hollow cylindrical structure, is arranged at the other end of the handle part and coaxial with the handle part, the radial inner diameter of the extension part is denoted as r2, the radial outer diameter is R, and r2>r1, the height of the extension part is not less than the length of the arterial stent graft; and a limiting part is arranged at the end of the extension part, and the limiting part is convex inward along the radial direction of the extension part.

8. The arterial stent delivery device of claim 7, It is characterized in that: The fixed handle includes: a fixed part, which is a cylindrical handle; a pulling part, which is convex at one end of the fixed part, and is movably arranged in the space enclosed by the limiting part; and an abutting part, which is convex at the end of the pulling part along the radial direction, and when the pulling part moves in the space enclosed by the limiting part, the abutting part abuts against the limiting part to prevent the operation handle and the fixed handle from being separated due to excessive pulling amplitude.

9. The arterial stent delivery device according to claim 8, characterized in that: wherein, The handle part, the extension part and the limiting part are designed in one piece, and the fixed part, the pulling part and the abutting part are designed in one piece.

10. The arterial stent delivery device of claim 1, It is characterized in that: The arterial stent graft includes: a thoracic aortic stent, including a main body straight cylindrical stent, a single-branch stent and a multi-branch stent; an abdominal aortic stent, including a main body stent, a branch stent, an AUI, a multi-branch stent and an IBD; and a peripheral vascular stent, including a self-expanding bare stent and a self-expanding covered stent.

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