CN116725742A - Sheath tube assembly for interventional operation, conveying device and valve prosthesis recovery method - Google Patents
Sheath tube assembly for interventional operation, conveying device and valve prosthesis recovery method Download PDFInfo
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- CN116725742A CN116725742A CN202310781385.9A CN202310781385A CN116725742A CN 116725742 A CN116725742 A CN 116725742A CN 202310781385 A CN202310781385 A CN 202310781385A CN 116725742 A CN116725742 A CN 116725742A
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- Prior art keywords
- concealable
- bodies
- closable
- interventional
- head
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- 238000011084 recovery Methods 0.000 title abstract description 24
- 210000003709 heart valve Anatomy 0.000 claims abstract description 83
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000013152 interventional procedure Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 230000006870 function Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 210000004204 blood vessel Anatomy 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
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- 239000010941 cobalt Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
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- 239000002861 polymer material Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229920002614 Polyether block amide Polymers 0.000 description 1
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Classifications
-
- 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
- A61F2/02—Prostheses implantable into the body
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
- A61F2/2427—Devices for manipulating or deploying heart valves during implantation
- A61F2/2436—Deployment by retracting a sheath
-
- 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
- A61F2/02—Prostheses implantable into the body
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
- A61F2/2427—Devices for manipulating or deploying heart valves during implantation
- A61F2/2439—Expansion controlled by filaments
Abstract
The application relates to the technical field of medical equipment, and provides a sheath tube assembly for interventional operation, a conveying device and a valve prosthesis recovery method, wherein the sheath tube assembly for interventional operation comprises the following components: the pipe body, the containing head which is positioned at the far end of the pipe body and the pulling piece which is penetrated through the containing head; the accommodating head can be switched between an expanding state and a contracting state; the traction piece is tightened, and the accommodating head part is converted from an expanding state to a contracting state. By the technical scheme, the heart valve prosthesis can be assisted to be recovered, and the convenience of medical staff for recovering the heart valve prosthesis is improved.
Description
Technical Field
The application relates to the technical field of medical instruments, in particular to a sheath tube assembly for interventional operation, a conveying device and a valve prosthesis recovery method.
Background
Heart valve disease is one of the most common heart diseases in China, valve degeneration (including calcification, mucus degeneration and the like) and metabolic disorder valve damage are increasingly increased in China along with the aging development of population in recent years, and at present, a novel treatment method with smaller wound, fewer complications and rapid postoperative rehabilitation is provided for medical staff by implanting heart valve prosthesis through minimally invasive surgery.
In the valve treatment process, the shape and the release of the heart valve prosthesis need to be conveyed and controlled by a conveyor, the conveyor generally comprises a sheath tube, an inner tube and a handle, the sheath tube and the inner tube are connected with the handle, the heart valve prosthesis is accommodated between the sheath tube and the inner tube, the sheath tube is controlled to move proximally, and the heart valve prosthesis is released.
When the implantation position of the heart valve prosthesis is inaccurate, a plurality of connecting rings at the proximal end of the heart valve prosthesis are sometimes required to be tensioned, the sheath tube is required to move distally, and the heart valve prosthesis is re-accommodated in the pipe fitting assembly to be re-released, but because the heart valve prosthesis has self-expanding force, at least part of the radial dimension of the heart valve prosthesis is larger than that of the sheath tube, and therefore, the sheath tube is difficult to recover when moving distally in the process of recovering.
Disclosure of Invention
The application aims to provide a sheath tube assembly for interventional operation, a conveying device and a valve prosthesis recovery method, which can assist heart valve prosthesis recovery and improve the convenience of medical staff in heart valve prosthesis recovery.
In order to solve the technical problems, the application adopts the following technical scheme:
in a first aspect, the present application provides a sheath assembly for interventional procedures comprising: the pipe body, the containing head part positioned at the far end of the pipe body and the pulling piece penetrating through the containing head part; the accommodating head can be switched between an expanding state and a contracting state; tightening the pulling member, the receiving head transitions from an expanded state to a contracted state.
As one embodiment, the housing head includes a closable portion and a concealable portion that is concealed by the closable portion in a contracted state.
As an embodiment, the connection of the closable portion to the distal end of the tube is such that the closable portion is elastically deformable in the axial direction of the tube and in a direction at an angle to the axial direction.
As one embodiment, the closable portion includes a plurality of closable bodies having distal ends smaller than proximal ends; a concealable body is arranged between two adjacent closeable bodies, and each concealable body jointly forms the concealable part; the traction piece is arranged on the hidden body in a penetrating way.
As one embodiment, each of the hidden bodies comprises two hidden split bodies which are respectively connected with the adjacent closable bodies to form an outer crease, the hidden split bodies are respectively provided with a far end smaller than a near end, and the near ends of the two hidden split bodies are mutually connected to form an inner crease; the distal end of each closable body and the distal ends of two adjacent hidden separable bodies form a distal point.
As one embodiment, the closable body and the concealable split are triangular sheets.
As one embodiment, the concealable split is an obtuse triangular sheet.
As one embodiment, the pulling member is disposed through the plurality of the concealable split bodies, and the penetrating position is disposed adjacent to the distal end point.
As one embodiment, each of the concealable bodies is a flexible body.
As an embodiment, each of the concealable bodies is connected to two adjacent closable bodies to form a crease, and the concealable bodies are each distal end larger than the proximal end.
As an embodiment, each of the closable bodies includes two arcuate sides, and the arcuate side of each of the closable bodies is closable by the arcuate side of the other of the closable bodies adjacent to the arcuate side.
As an embodiment, the concealable body is provided with at least two through holes for the pulling members to pass through, and the pulling members pass through each concealable body through the through holes and pass over the closeable body.
As one embodiment, the portion of the pulling member that passes over the closable body is located on the inner peripheral side of the housing head.
As one embodiment, the through hole is provided adjacent to the distal end of the concealable body.
In a second aspect, the present application provides an interventional delivery device comprising the interventional surgical sheath assembly provided in the first aspect; the heart valve prosthesis comprises a handle connected with a tube body and an inner tube which extends in the tube body and is connected with the handle, wherein a containing space for containing the heart valve prosthesis is arranged between the tube body and the inner tube.
As one embodiment, a pulling member extends within the tube and at least one end of the pulling member is connected to the handle.
In a third aspect, the present application provides a method of recovering an interventional valve prosthesis: the method comprises the following steps:
s1, when a heart valve prosthesis needs to be recovered, deforming a containing head of an interventional conveying device into an expanded state;
s2, enabling at least one part of the heart valve prosthesis to enter the accommodating head in an expanded state;
s3, tightening the accommodating head in the expanded state by using a traction piece.
In one embodiment, in step S1, the pulling member is operated by a handle, and the pulling member is paid out to deform the accommodating head portion into an expanded state.
In one embodiment, in step S2, the proximal ends of the heart valve prostheses are connected by a connecting wire, which is tightened such that the radial dimension of the proximal ends of the heart valve prostheses is smaller than the receiving head in the expanded state.
The technical scheme of the application has the following effects:
1. the sheath tube assembly comprises a tube body and a containing head part positioned at the distal end of the tube body, wherein the containing head part is provided with two states of expansion and contraction and can be switched between the expansion state and the contraction state, and the sheath tube assembly also comprises a traction part which is arranged on the containing head part in a penetrating way; when the heart valve prosthesis needs to be recovered, the traction piece is tightened, and the accommodating head in the expanded state is converted into the contracted state from the expanded state, so that the heart valve prosthesis can be recovered in an assisted manner, and the convenience of the heart valve prosthesis recovery is improved.
2. The closable part comprises a plurality of closable bodies with the distal ends smaller than the proximal ends, so that the accommodating head can encircle the periphery of the heart valve prosthesis from a plurality of different directions, has better positioning and guiding effects on the heart valve prosthesis, and improves the success rate of recovery; meanwhile, the width of the closable body is gradually widened from the distal end to the proximal end, so that the radial dimension of the distal end of the accommodating head in a contracted state is smaller than that of the proximal end, and the influence of the sheath on the blood vessel during intervention can be reduced;
in addition, the hidden bodies are arranged between the two adjacent closable bodies, the hidden parts are jointly formed by the hidden bodies, the hidden parts can be matched with the closable parts, the area of the far end of the accommodating head part in the expanded state, which is surrounded by the closable bodies and the hidden bodies, is improved, and the success rate of recovering the heart valve prosthesis is improved; when the accommodating head is in a contracted state, the concealable part can be concealed at the inner side of the closeable part, so that the outer surface of the accommodating head is the closeable part, and the radial dimension of the far end is smaller than that of the near end, thereby reducing the influence of the sheath tube on the blood vessel during intervention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a sheath assembly according to one embodiment of the present application;
FIG. 2 is a schematic view of a sheath assembly according to one embodiment of the present application from different viewing angles;
FIG. 3 is a schematic view of a sheath assembly according to another embodiment of the present application;
FIG. 4 is a schematic view of a sheath assembly according to another embodiment of the present application from a different perspective;
FIG. 5 is a schematic view of a sheath according to one embodiment of the present application in a contracted state;
FIG. 6 is a schematic view of a sheath according to another embodiment of the present application in a contracted state;
fig. 7 is a schematic partial structure of an interventional delivery device according to an embodiment of the present application;
fig. 8 is a schematic view of the structure of a sheath assembly for assisting in the recovery of a heart valve prosthesis according to an embodiment of the present application.
Icon: 10-sheath; 1-a tube body; 2-accommodating the head; 21-a closable portion; 211-closable; 22-a concealable portion; 221-a concealable body; 2211-concealable split; 3-pulling member; 4-inner folds; 5-outer folds; 6-folding; 7-an interventional delivery device; 8-a handle; a 9-heart valve prosthesis; 11-inner tube.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present application, the term "distal end" means an end of components in the delivery device near heart tissue, and "proximal end" means an end of the delivery device near an operator, and the terms "first", "second", etc. are used for distinguishing the description only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, 3, 7 and 8, in a first aspect, the present application introduces a sheath assembly for interventional procedures, which is mounted on a handle 8 of an interventional delivery device 7, the sheath assembly comprising a sheath 10, the sheath 10 being controllable by a knob on the handle 8 to move the sheath 10 axially relative to an inner tube 11, thereby releasing or retrieving a heart valve prosthesis 9.
As shown in fig. 1, 3, 5 and 6, the distal end of the sheath 10 has an expanded state in which the heart valve prosthesis 9 can be released and a contracted state in which at least a portion of the heart valve prosthesis 9 can be wrapped, thereby serving as an auxiliary function for recovery of the heart valve prosthesis 9, improving the convenience of recovery of the heart valve prosthesis 9, and further improving the success rate of the interventional operation.
As shown in fig. 1, 3, 5, 6 and 8, the sheath 10 includes a tube 1 and a housing head 2 fixedly connected to the tube 1, the housing head 2 is located at a distal end of the tube 1, and the housing head 2 is changeable between a contracted state and an expanded state; before the heart valve prosthesis 9 is released, the containment head 2 is in a contracted state, which is in a fully or partially expanded state when the heart valve prosthesis 9 is released. The sheath assembly comprises a pulling member 3 which is arranged through the accommodating head 2, when the pulling member 3 is loosened, the accommodating head 2 can be converted from a contracted state to an expanded state, when the pulling member 3 is tightened, the accommodating head 2 can be converted from the expanded state to the contracted state, and when the accommodating head 2 is in the expanded state, the expanded size of the accommodating head 2 is larger than the radial size of the tube body 1, so that at least part of the heart valve prosthesis 9 can be more easily wrapped. When the heart valve prosthesis 9 needs to be recovered, the traction piece 3 is pulled tightly, the traction piece 3 controls the accommodating head 2 to shrink, the heart valve prosthesis 9 is recovered in an auxiliary mode, and the convenience of recovery of the heart valve prosthesis 9 is improved.
Alternatively, the tube body 1 can be made of polymer materials, polymer and metal braided wires or polymer and metal cutting brackets. The polymer material can be polyether block amide, nylon, polytetrafluoroethylene and the like, the metal material can be SUS304, nickel-titanium alloy and the like, and the main processing mode is extrusion or hot melt molding.
The pulling member 3 may be a medical suture or a flexible wire or the like.
As shown in fig. 1 to 4, as an embodiment, the accommodating head 2 includes a closable portion 21 and a concealable portion 22 that is hidden by the closable portion 21 in a contracted state, by providing the concealable portion 22, when the accommodating head 2 is in the contracted state, the concealable portion 22 can be concealed, the space occupied by the accommodating head 2 is reduced, the accommodating head 2 is made to form a tapered structure, the guiding and protecting functions of the blood vessel are performed during the intervention of the interventional delivery device 7, and the guiding head is reduced to be provided at the distal end of the inner tube 11, thereby reducing the production cost, and simultaneously, in the expanded state of the accommodating head 2, the concealable portion 22 cooperates with the closable portion 21, the region surrounded by the concealable portion 22 and the closable portion 21 at the distal end of the accommodating head 2 is increased, thereby having a better positioning guiding function on the heart valve prosthesis 9, improving the recovery success rate, and further improving the convenience of recovering the heart valve prosthesis 9.
As an embodiment, the closable portion 21 is connected to the distal end of the tube body 1 in such a manner that the closable portion 21 can be elastically deformed in the axial direction of the tube body 1 and in a direction forming a certain angle with the axial direction, so that the accommodating head 2 can be mutually converted between a contracted state and an expanded state, and a medical staff can control the shape of the accommodating head 2 conveniently.
Alternatively, the closable portion 21 can spring outwardly in the radial direction of the tube body 1 in the contracted state of the accommodating head 2.
Alternatively, the accommodating head 2 in the expanded state, the closable portion 21 is disposed obliquely distally from the axial direction of the tube body 1.
As shown in fig. 2 and 4, as an embodiment, the closable portion 21 includes a plurality of closable bodies 211 having distal ends smaller than proximal ends, so that the plurality of closable bodies 211 form the accommodating head 2 into a tapered structure in the contracted state of the accommodating head 2, and function to guide and protect blood vessels during the intervention of the interventional delivery device 7;
the concealable bodies 221 are arranged between two adjacent closeable bodies 211, each concealable body 221 forms a concealable part 22 together, so that in the expanded state of the accommodating head 2, each concealable body 221 can increase the area, surrounded by the concealable body 221 and the closeable body 211, of the far end of the accommodating head 2, has a better positioning and guiding effect on the heart valve prosthesis 9, improves the recovery success rate, when the accommodating head 2 is in the contracted state, the concealable body 221 can be concealed, reduces the occupied volume of the accommodating head 2, and the traction piece 3 is arranged on the concealable body 221 in a penetrating way, and further tightens the accommodating head 2 by controlling the concealable body 221 through the traction piece 3, so that the accommodating head 2 is changed from the expanded state to the contracted state to assist recovery of the heart valve prosthesis 9.
As shown in fig. 1 and 2, as an embodiment, each of the hidden bodies 221 includes two hidden sub-bodies 2211 respectively connected with the adjacent closable bodies 211 to form the outer crease 5, each hidden sub-body 2211 has a distal end with a width smaller than a proximal end, and proximal ends of the two hidden sub-bodies 2211 are connected with each other to form the inner crease 4; the accommodating head 2 can be switched between an expanded state and a contracted state by the outer folds 5 and the inner folds 4.
In addition, the distal end of each closable body 211 and the distal ends of the adjacent two hidden split bodies 2211 form a distal point, so that the plurality of distal points of the accommodating head 2 are converged in the contracted state, the distal end of the accommodating head 2 is pointed, and the guiding function is performed during the intervention of the interventional delivery device 7.
Optionally, the angle formed by the connection of each closable body 211 to the adjacent two concealable bodies 221 is obtuse, so that the area of the receiving head 2 in the expanded state, which provides support for the heart valve prosthesis 9, can be enlarged, and the oriented support position for the heart valve prosthesis 9 can be provided more easily.
Alternatively, a part of the connection position between each closable body 211 and the tube body 1 may be made of an elastic deformation memory alloy, so that the connection between the closable portion 21 and the distal end of the tube body 1 may be made of an elastic deformation connection, and further, the conversion between the elastic deformation of the accommodating head 2 between the contracted state and the expanded state of the distal end of the tube body 1 may be made.
Of course, the whole of the closable body 211 may be made of a memory alloy having elastic deformation, so as to improve the stability of the closable portion 21 and provide stable support for the heart valve prosthesis 9 to improve the success rate of recovery, and in addition, the plurality of closable bodies 211 can improve the radial contraction force provided to the heart valve prosthesis 9 in a plurality of directions while assisting recovery of the heart valve prosthesis 9 by the toughness of the metal, and can reduce deformation of the closable body 211.
Alternatively, the closable body 211 may be selected from alloys such as stainless steel, titanium alloys, nickel titanium alloys, other shape memory alloys, alloys containing primarily cobalt, chromium, nickel or molybdenum, and the like.
Alternatively, each of the concealable sections 2211 may be selected from the same materials as the closable body 211, such as stainless steel, titanium alloy, nickel-titanium alloy, other shape memory alloys, alloys mainly comprising cobalt, chromium, nickel or molybdenum, and the like.
As shown in fig. 1 and 2, as an embodiment, the closable body 211 and the concealable split 2211 are both triangular sheet bodies, and the closable body 211 and the concealable split 2211 are designed into triangular shapes, so that on one hand, in the contracted state of the accommodating head 2, the distal end of the accommodating head 2 is pointed, and the guiding function is played in the intervention process of the intervention type conveying device 7; on the other hand, the proximal ends of the two concealable split 2211 are connected to each other more easily forming an inner fold 4 to facilitate the retraction of the receiving head 2.
As shown in fig. 1 and 2, as an embodiment, the concealable split 2211 may be an obtuse triangular sheet, so that when the pulling member 3 re-tightens the accommodating head 2, the accommodating head 2 is more easily converted from the expanded state to the contracted state.
As shown in fig. 1 and 2, as an embodiment, the pulling member 3 is disposed through the plurality of concealable split bodies 2211, and the disposed position is disposed adjacent to the distal end point, so that the convenience of operation is improved when the pulling member 3 tightens the accommodating head 2, and the accommodating head 2 is more easily converted from the expanded state to the contracted state.
Optionally, the threading position is disposed adjacent to the distal end point, wherein adjacent means that the pulling member 3 is threaded on the concealable split 2211 at a position near the distal end point of the most distal end of the accommodating head 2.
Optionally, one way of threading the pulling member 3 with the accommodating head 2 is as follows: the first part of the pulling piece 3 is penetrated through each hidden split 2211 to form a wire loop, one end of the second part is connected with the pulling piece 3 forming the wire loop, the other end of the second part is connected with the handle 8, when the pulling piece 3 of the second part is pulled, the pulling piece 3 of the second part pulls the pulling piece 3 of the first part, the wire loop diameter of the first part is reduced, the hidden split 2211 is contracted at the same time, and finally the accommodating head 2 is changed from an expanded state to a contracted state;
the other threading mode of the traction piece 3 and the accommodating head 2 is as follows: each hidden split 2211 is partially penetrated through the pulling piece 3, and two ends of the pulling piece 3 penetrate out of the same closable body 211 and are connected with the handle 8;
the threading mode of the pulling piece 3 and the accommodating head 2 is as follows: one end of the pulling member 3 is tied to the penetrating position of any one of the hidden split bodies 2211, and the other end of the pulling member passes through each of the hidden split bodies 2211, and after one circle of pulling member is penetrated, the pulling member can be penetrated out from the hidden split body 2211 at the tied position, connected with the handle 8, or penetrated out from the closable body 211 connected with the hidden split body 2211 at the tied position, and connected with the handle 8.
As shown in fig. 3 and 4, as an embodiment, each of the concealable bodies 221 is a flexible body, so that when the accommodating head 2 is converted from the expanded state to the contracted state, the concealable body 221 can be more easily concealed by the closeable body 211 by folding by itself by the characteristic of flexibility.
Optionally, the concealable body 221 may be provided with a crease 6 itself, so that when the accommodating head 2 is contracted, the concealable body 221 can be concealed, reducing the volume of the accommodating head 2.
Alternatively, the flexible body may be a drug coated membrane or an artificial vascular membrane.
As shown in fig. 3 and 4, as an embodiment, a crease 6 is formed at a connection position of each of the hidden bodies 221 and the adjacent two closable bodies 211, so that the accommodating head 2 can be switched between the expanded state and the contracted state by the crease 6.
The concealable bodies 221 are all distal ends larger than proximal ends, so that the concealable bodies 211 can be connected with two adjacent closeable bodies 211, the radial dimension of the accommodating head 2 in an expanded state is increased, in the expanded state, the accommodating head 2 similar to a bowl-shaped structure is formed with a plurality of closeable bodies 211, the positioning guiding function is better on the heart valve prosthesis 9, the recovery success rate is improved, and the convenience of recovering the heart valve prosthesis 9 is further improved.
As shown in fig. 3 and 4, as an embodiment, each closable body 211 includes two arcuate edges, so that the position of the fold 6 of the accommodating head 2 is smoother in the contracted state of the accommodating head 2, the loss to the blood vessel is reduced, the arcuate edge of each closable body 211 can be closed with the arcuate edge of the other closable body 211 adjacent to the arcuate edge, thereby hiding the concealable body 221, and at the same time, in the contracted state of the accommodating head 2, any cross-sectional area of the accommodating head from the distal end to the proximal end can be gradually increased, so that the distal end of the accommodating head 2 is pointed, the guiding function is performed in the intervention process of the intervention type conveying device 7, and in addition, the guiding head is not required to be installed at the distal end of the inner tube 11, thereby also playing a role of saving the cost.
As an embodiment, the concealable body 221 is provided with at least two through holes for the pulling member 3 to pass through, and the pulling member 3 passes through each concealable body 221 and passes over the closeable body 211 through the through holes, so that when the pulling member 3 tightens the accommodating head 2, the accommodating head 2 is easier to be converted from an expanded state to a contracted state, and the operation convenience is improved.
As shown in fig. 3 and 4, the threading mode of the pulling member 3 and the accommodating head 2 is as follows: each hidden body 221 is partially penetrated through the pulling piece 3, and two ends of the pulling piece 3 penetrate out of the same hidden body 221 and are connected with the handle 8;
the other threading mode of the traction piece 3 and the accommodating head 2 is as follows: one end of the pulling member 3 is tied to the penetrating position of any one of the concealable bodies 221, and the other end passes through each of the concealable bodies 221, passes through each of the concealable bodies 221 along the circumferential direction of the contracted head, then passes out of the concealable body 221 at the tied position, and is connected with the handle 8.
As shown in fig. 4, as an embodiment, the portion of the drawer 3 that passes over the closable body 211 is located on the inner peripheral side of the accommodating head 2, so that the blood blocking of the drawer 3 is reduced, and if it is located on the outer peripheral side, the blood circulation is affected.
As an embodiment, the through hole is formed at a position adjacent to the distal end of the concealable body 221, so that the convenience of operation is improved when the pulling member 3 tightens the accommodating head 2, and the accommodating head 2 is more easily converted from the expanded state to the contracted state.
Alternatively, the proximity of the through hole in a position adjacent to the distal end of the concealable body 221 means that the position of the through hole is close to the edge of the furthest end of the concealable body 211.
As shown in fig. 7 and 8, in a second aspect, an embodiment of the present application provides an interventional delivery device 7, including the sheath tube assembly for interventional operation provided in the first aspect, the interventional delivery device 7 further includes a handle 8 connected to the tube body 1, and an inner tube 11 extending inside the tube body 1 and also connected to the handle 8, and a receiving space for receiving the heart valve prosthesis 9 is provided between the tube body 1 and the inner tube 11.
The tube body 1 moves towards the proximal end relative to the inner tube 11, so that the heart valve prosthesis 9 is released from the accommodating space, the distal end of the accommodating head 2 can be in a fully-expanded or partially-expanded state, when the heart valve prosthesis 9 needs to be recovered, the heart valve prosthesis 9 is pulled towards the proximal end, the connecting ring is abutted to the inner peripheral side of the accommodating head 2, meanwhile, the heart valve prosthesis 9 is controlled to shrink, the accommodating head 2 is tensioned through the traction piece 3, the heart valve prosthesis 9 is surrounded by the accommodating head 2 from multiple directions, the traction piece 3 is further tensioned, the accommodating head 2 is further shrunk, and therefore the effect of assisting in recovering the heart valve prosthesis 9 is achieved, the recovery convenience of the heart valve prosthesis 9 is improved, and the success rate of an interventional operation is further improved.
As an embodiment, the pulling member 3 extends in the tube body 1, and at least one end is connected to the handle 8, and by operating the handle 8, the pulling member 3 is pulled to retract the accommodating head 2, and of course, in some cases, both ends of the pulling member 3 may be connected to the handle 8.
In a third aspect, embodiments of the present application provide a method of recovering an interventional valve prosthesis, comprising the steps of:
s1, when the heart valve prosthesis 9 needs to be recovered, deforming the accommodating head 2 of the interventional conveying device 7 into an expanded state;
s2, making at least one part of the heart valve prosthesis 9 enter the accommodating head 2 in an expanded state;
s3, the traction piece 3 is used for tightening the accommodating head 2 in the expanded state.
As shown in fig. 7 and 8, when the heart valve prosthesis 9 needs to be recovered, the accommodating head 2 is controlled to be in an expanded state, so that the area formed by the distal end of the accommodating head 2 for accommodating the heart valve prosthesis 9 is larger than the radial dimension of the heart valve prosthesis 9, the heart valve prosthesis 9 is guided, the heart valve prosthesis 9 is pulled proximally, at least one part of the heart valve prosthesis 9 enters the inner peripheral side of the accommodating head 2 in the expanded state, the heart valve prosthesis 9 is controlled to be contracted, the accommodating head 2 is pulled tightly by the pulling member 3, the heart valve prosthesis 9 is surrounded by the accommodating head 2 from multiple directions, the pulling member 3 is pulled further, the accommodating head 2 is further contracted, the recovery of the heart valve prosthesis 9 is assisted, the recovery convenience of the heart valve prosthesis 9 is improved, and the success rate of the interventional operation is further improved.
As an embodiment, in step S1, the pulling member 3 is operated by the handle 8, the pulling member 3 is paid out, the accommodating head 2 is deformed to an expanded state, and an abutment position is provided for the heart valve prosthesis 9, so that the heart valve prosthesis 9 can be recovered conveniently.
Optionally, a knob is arranged on the handle 8, and the pulling piece 3 can be tensioned or paid off through the operation knob, so that the operation convenience is improved.
As an embodiment, in step S2, the proximal ends of the heart valve prostheses 9 are connected by a connecting wire, and when the heart valve prostheses 9 need to be recovered, the connecting wire is pulled to make the radial dimension of the proximal ends of the heart valve prostheses 9 smaller than the region formed at the distal ends of the accommodating heads 2 in the expanded state for accommodating the heart valve prostheses 9, so that the accommodating heads 2 can wrap at least a part of the heart valve prostheses 9, thereby playing a role in assisting recovery of the heart valve prostheses 9, improving the convenience of recovery of the heart valve prostheses 9, and further improving the success rate of the interventional operation.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (19)
1. A sheath and tube assembly for interventional procedures, comprising:
the pipe body, the containing head part positioned at the far end of the pipe body and the pulling piece penetrating through the containing head part;
the accommodating head can be switched between an expanding state and a contracting state;
tightening the pulling member, the receiving head transitions from an expanded state to a contracted state.
2. The interventional sheath assembly according to claim 1, wherein the containment head comprises a closable portion and a concealable portion that is concealed by the closable portion in a contracted state.
3. The interventional sheath assembly according to claim 2, wherein the connection of the closable portion to the distal end of the tube is a connection in which the closable portion is elastically deformable in the axial direction of the tube and in a direction at an angle to the axial direction.
4. The interventional sheath assembly according to claim 3, wherein the closable portion comprises a plurality of closable bodies having distal ends smaller than proximal ends;
a concealable body is arranged between two adjacent closeable bodies, and each concealable body jointly forms the concealable part;
the traction piece is arranged on the hidden body in a penetrating way.
5. The interventional sheath assembly of claim 4, wherein each of the concealable bodies comprises two concealable sub-bodies each connected to an adjacent one of the closeable bodies to form an outer fold, the concealable sub-bodies each having a distal end less than a proximal end, and the proximal ends of the two concealable sub-bodies being connected to each other to form an inner fold;
the distal end of each closable body and the distal ends of two adjacent hidden separable bodies form a distal point.
6. The interventional sheath assembly of claim 5, wherein the closable body and the concealable sub-body are triangular sheets.
7. The interventional sheath assembly of claim 6, wherein the concealable split is an obtuse triangular sheet.
8. The interventional sheath assembly of claim 6 or 7, wherein the pulling member is disposed through the plurality of concealable sub-bodies in a position adjacent the distal point.
9. The interventional sheath assembly of claim 4, wherein each of the concealable bodies is a flexible body.
10. The interventional sheath assembly of claim 9, wherein each of the concealable bodies is joined to adjacent two closable bodies to form a crease, the concealable bodies each being distally larger than proximally.
11. The interventional sheath assembly of claim 10, wherein each of the closable bodies includes two arcuate edges, the arcuate edge of each of the closable bodies being closable by the arcuate edge of the other of the closable bodies adjacent the arcuate edge.
12. The interventional sheath assembly according to claim 11, wherein the concealable body is provided with at least two through holes for the pull member to pass through, through the through holes, through each of the concealable bodies and over the closeable body.
13. The interventional sheath assembly of claim 12, wherein the portion of the retractor that passes over the closable body is located on an inner peripheral side of the receiving head.
14. The interventional sheath assembly of claim 12 or 13, wherein the through-hole opens at a location adjacent the distal end of the concealable body.
15. An interventional delivery device comprising the interventional sheath assembly of any one of claims 1 to 14;
the heart valve prosthesis comprises a handle connected with a tube body and an inner tube which extends in the tube body and is connected with the handle, wherein a containing space for containing the heart valve prosthesis is arranged between the tube body and the inner tube.
16. The interventional delivery device of claim 15, wherein a pulling member extends within the tube and at least one end of the pulling member is connected to the handle.
17. A method of recovering an interventional valve prosthesis, comprising the steps of:
s1, when a heart valve prosthesis needs to be recovered, deforming a containing head of an interventional conveying device into an expanded state;
s2, enabling at least one part of the heart valve prosthesis to enter the accommodating head in an expanded state;
s3, tightening the accommodating head in the expanded state by using a traction piece.
18. The method according to claim 17, wherein in step S1, the pulling member is operated by a handle to pay out the pulling member and deform the housing head into an expanded state.
19. The method of claim 17 or 18, wherein in step S2 the proximal ends of the heart valve prostheses are connected by a connecting wire, the connecting wire being tightened such that the radial dimension of the proximal ends of the heart valve prostheses is smaller than the receiving head in the expanded state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310781385.9A CN116725742A (en) | 2023-06-28 | 2023-06-28 | Sheath tube assembly for interventional operation, conveying device and valve prosthesis recovery method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310781385.9A CN116725742A (en) | 2023-06-28 | 2023-06-28 | Sheath tube assembly for interventional operation, conveying device and valve prosthesis recovery method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116725742A true CN116725742A (en) | 2023-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310781385.9A Pending CN116725742A (en) | 2023-06-28 | 2023-06-28 | Sheath tube assembly for interventional operation, conveying device and valve prosthesis recovery method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116725742A (en) |
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2023
- 2023-06-28 CN CN202310781385.9A patent/CN116725742A/en active Pending
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