CN114027902B - Transvascular knotting device and application method thereof - Google Patents
Transvascular knotting device and application method thereof Download PDFInfo
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- CN114027902B CN114027902B CN202111267751.6A CN202111267751A CN114027902B CN 114027902 B CN114027902 B CN 114027902B CN 202111267751 A CN202111267751 A CN 202111267751A CN 114027902 B CN114027902 B CN 114027902B
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 210000004204 blood vessel Anatomy 0.000 claims abstract description 22
- 230000000149 penetrating effect Effects 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims description 43
- 239000004973 liquid crystal related substance Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002980 postoperative effect Effects 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0469—Suturing instruments for use in minimally invasive surgery, e.g. endoscopic surgery
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12009—Implements for ligaturing other than by clamps or clips, e.g. using a loop with a slip knot
- A61B17/12013—Implements for ligaturing other than by clamps or clips, e.g. using a loop with a slip knot for use in minimally invasive surgery, e.g. endoscopic surgery
Abstract
The invention discloses a transvascular knotting device and a use method thereof, comprising the following steps: the inner core unit is provided with a knotting unit at the lower part, and the upper part of the inner hole is used for penetrating the cable; the knotting unit moves in the inner hole to control the working state of the cable; a driving unit for controlling the knotting unit to move; the driving unit is flexible to extend along the deformation of the blood vessel, and moves in the blood vessel to push the knotting unit to squeeze the cable to the inner wall of the inner hole, so that the cable is knotted. The invention fully utilizes the inner space of the inner core unit to assemble the knotting unit, not only does not increase the structural size and reduce the volume of the element remained in the human body, but also reduces the operation risk and the burden of a patient, realizes the remote knotting operation, and improves the knotting stability and the operation convenience.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a transvascular knotting device and a use method thereof.
Background
In the medical field, particularly in cardiac repair surgery, it is necessary to perform a knotting (or so-called locking) operation on the wires, ropes or cables used in the instrument. For the scenario of post-operative knotting operations requiring long and curved vessels, there is currently a lack of corresponding flexible instruments. Moreover, the existing conventional instruments adopt springs to provide locking force, so that the problems of damping of the springs, insufficient locking force and the like exist. In view of the problems with current devices and the urgent needs of medical personnel, there is a great need in the art for a new medical knotting device, and more particularly, for a device for knotting long distances through blood vessels, so as to overcome at least one of the above problems, thereby reducing the difficulty of surgical operation, facilitating the use, and improving the success rate of surgery.
Disclosure of Invention
In order to overcome the problems, the invention provides a transvascular knotting device and a use method thereof. The inner space of the inner core unit is fully utilized to assemble the knotting unit, so that the structural size is not increased, the volume of an element reserved in a human body is reduced, and the operation risk and the burden of a patient are reduced. The device can be bent and extended along the blood vessel, and the cable knot in a long distance and a small space is realized. The reliability and the safety of the knotting apparatus are improved, and a plurality of cables can be locked synchronously.
To achieve the above object, according to one aspect of the embodiments of the present invention, there is provided a transvascular knotting apparatus comprising:
the inner core unit is provided with a knotting unit at the lower part, and the upper part of the inner hole is used for penetrating the cable;
the knotting unit moves in the inner hole to control the working state of the cable;
a driving unit for controlling the knotting unit to move;
the driving unit is flexible to extend along the deformation of the blood vessel, and moves axially in the blood vessel to push the knotting unit to extrude the cable to the inner wall of the inner hole, so that the cable is knotted.
Optionally, the knotting unit comprises a pressing plate, a sliding block and a driving screw rod, wherein,
the contact surface between the lower part of the pressing plate and the upper part of the sliding block is an inclined surface, the driving screw is in threaded connection with the inner core unit, and the front end surface of the driving screw is in contact with the rear end surface of the sliding block so as to push the sliding block to lift the pressing plate to control the working state of the cable.
Optionally, the included angle between the inclined plane and the axis of the inner core unit is 10-15 degrees.
Optionally, the sliding block is a hemispherical body, and the front end surface of the driving screw is fixedly connected with the rear end surface of the hemispherical body, or the driving screw and the hemispherical body are integrated.
Optionally, a connecting part, a protruding part and a threading part are sequentially arranged on the top of the pressing plate far away from the inclined plane,
after the connecting part is connected with the channel part of the inner hole, a threading channel is formed between the inner hole and the upper surface of the pressing plate;
the protruding part is used for extruding the cable;
the threading part is used for guiding the cable to penetrate into the threading channel.
Optionally, in a longitudinal section of the knotting apparatus, a longitudinal distance between the protrusion and the inner hole of the inner core unit is smaller than a longitudinal distance between both ends of the inclined surface of the pressing plate, so as to prevent the slider from being separated from the inner hole.
Optionally, the rear end of the driving screw is detachably connected with the front end of the driving rod in the driving unit through a buckle; the driving rod comprises a buckling part and a torsion-resistant flexible part, wherein the buckling part is provided with a buckle to realize buckling connection with the driving screw, and the torsion-resistant flexible part controls the driving screw to rotate so as to push the sliding block to move.
Optionally, the drive unit further comprises a connecting element, a connecting rod and a braided hose; wherein, the liquid crystal display device comprises a liquid crystal display device,
the connecting rod passes through the first through hole of the connecting element and is in threaded connection with the inner core unit;
the front end face of the braided hose is fixedly connected with the rear end face of the connecting element, an inner hole of the braided hose is communicated with the second through hole of the connecting element to form a through hole, and the driving screw rod and the driving rod are arranged in the through hole; the snap connection is located in the second through hole to be restrained by the inner wall of the second through hole;
the front end face of the connecting element abuts against the rear end face of the core unit, and the rear end face of the connecting element abuts against the step face of the connecting rod to fix the connecting element between the connecting rod and the core unit.
According to a second aspect of embodiments of the present invention, there is provided a method of using a transvascular knotting device, comprising:
the inner core unit is provided with a knotting unit at the lower part, and the upper part of the inner hole is used for penetrating the cable;
the knotting unit moves in the inner hole to control the working state of the cable;
a driving unit for controlling the knotting unit to move;
the driving unit is flexible to extend along the deformation of the blood vessel, and when the device is used, the driving unit is controlled to axially move in the blood vessel so as to push the knotting unit to squeeze the cable to the inner wall of the inner hole, so that knotting of the cable is realized.
Optionally, the knotting unit comprises a pressing plate, a sliding block and a driving screw rod, wherein,
the contact surface between the lower part of the pressing plate and the upper part of the sliding block is an inclined surface, the driving screw is in threaded connection with the inner core unit, the front end surface of the driving screw is in contact with the rear end surface of the sliding block, and the driving screw rotates in the inner core unit to push the sliding block to move, so that the pressing plate is lifted to control the working state of the cable.
Optionally, the included angle between the inclined plane and the axis of the inner core unit is 10-15 degrees.
Optionally, the sliding block is a hemispherical body, and the front end surface of the driving screw is fixedly connected with the rear end surface of the hemispherical body, or the driving screw and the hemispherical body are integrated.
Optionally, a connecting part, a protruding part and a threading part are sequentially arranged on the top of the pressing plate far away from the inclined plane,
the connecting part is connected with the channel part of the inner hole of the inner core unit, and then a threading channel is formed between the inner hole and the upper surface of the pressing plate;
the protruding part is used for extruding the cable;
the threading part is used for guiding the cable to penetrate into the threading channel.
Optionally, in a longitudinal section of the knotting apparatus, a longitudinal distance between the protrusion and the inner hole of the inner core unit is smaller than a longitudinal distance between both ends of the inclined surface of the pressing plate, so as to prevent the slider from being separated from the inner hole.
Optionally, the rear end of the driving screw is detachably connected with the front end of the driving rod in the driving unit through a buckle; the driving rod comprises a buckling part and a torsion-resistant flexible part, wherein the buckling part is provided with a buckle to realize buckling connection with the driving screw, and the torsion-resistant flexible part controls the driving screw to rotate to control the position of the sliding block.
Optionally, the drive unit further comprises a connecting element, a connecting rod and a braided hose; wherein, the liquid crystal display device comprises a liquid crystal display device,
the connecting rod passes through the first through hole of the connecting element and is in threaded connection with the inner core unit;
the front end face of the braided hose is fixedly connected with the rear end face of the connecting element, an inner hole of the braided hose is communicated with the second through hole of the connecting element to form a through hole, and the driving screw rod and the driving rod are arranged in the through hole; the snap connection is located in the second through hole to be restrained by the inner wall of the second through hole;
the front end face of the connecting element abuts against the rear end face of the core unit, and the rear end face of the connecting element abuts against the step face of the connecting rod to fix the connecting element between the connecting rod and the core unit.
Optionally, when knotting, the driving rod is rotated to enable the driving screw to synchronously rotate so as to push the sliding block to advance;
the inclined surface contact position between the pressing plate and the sliding block is changed, so that the convex part of the pressing plate presses the cable to fix the cable;
after knotting is completed, the connecting rod is rotated to be separated from the inner core unit;
withdrawing the braided hose and the connecting element to release the snap connection between the drive rod and the drive screw from external restraint;
and releasing the buckling connection between the driving rod and the driving screw rod and withdrawing the driving rod.
The technical scheme of the invention has the following advantages or beneficial effects:
(1) The upper part of the inner hole of the inner core unit is used for penetrating the cable, and the knotting unit is arranged at the lower part of the inner hole, so that the inner space of the inner core unit is fully utilized to assemble the knotting unit, the structural size is not only increased, the volume of the instrument reserved in the human body is reduced, but also the operation risk and the burden of a patient are reduced.
(2) The driving unit adopts a flexible structure, and the inner core unit with a miniaturized design can lead the instrument to extend along the bending of the blood vessel, thereby realizing the knotting of the cable in a long distance and a small space.
(3) Through the thread self-locking structure of the driving screw and the inclined plane self-locking structure between the sliding block and the pressing plate, double self-locking is formed, and the knotting reliability and safety are improved.
(4) After the connecting part of the pressing plate is connected with the channel part of the inner hole of the inner core unit, a threading channel is formed between the inner hole and the upper surface of the pressing plate; the threading part is used for guiding the cable to penetrate into the threading channel; the design is convenient for external threading, can penetrate into a plurality of cables simultaneously, and is convenient for synchronously locking the cables.
(5) The sliding block is a hemispherical body, the front end surface of the driving screw is fixedly connected with the rear end surface of the hemispherical body, or the driving screw and the hemispherical body are integrated elements; the design structure can repeatedly operate the knotting device to obtain the needed knotting position, and the convenience of operation and the accuracy of the knotting position are improved.
Drawings
The drawings are included to provide a better understanding of the invention and are not to be construed as unduly limiting the invention. Wherein:
FIG. 1 is a cross-sectional view of an assembled structure of a knotting apparatus of an embodiment of the present invention along an axis;
fig. 2 and 3 are schematic views of perspective structures of different viewing angles of the core unit according to an embodiment of the present invention;
FIG. 4 is a schematic view of a slider according to an embodiment of the present invention;
FIG. 5 is a schematic view of a platen according to an embodiment of the present invention;
FIG. 6 is a schematic illustration of a connecting element according to an embodiment of the invention;
FIG. 7 is a schematic view showing a structure in which a knotting apparatus according to an embodiment of the present invention is left in a human body;
FIG. 8 is an enlarged view of a partial cross-sectional view of a knotting apparatus according to an embodiment of the present invention;
FIG. 9 is a schematic view of a detail threading of a knotting apparatus according to an embodiment of the present invention;
FIG. 10 is a schematic view of a connecting rod according to an embodiment of the present invention;
FIG. 11 is a schematic view of a drive rod according to an embodiment of the present invention;
FIG. 12 is a schematic view of a drive screw according to an embodiment of the present invention;
FIG. 13 is a schematic view of another embodiment of a knotting apparatus according to the present invention.
Detailed Description
Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, in which various details of the embodiments of the present invention are included to facilitate understanding, and are to be considered merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
According to one aspect of an embodiment of the present invention, a transvascular knotting device is provided. The knotting device is used for performing knotting operation on cable-shaped elements such as cables, ropes, wires and the like implanted in a human body. The device is particularly suitable for knotting operation of wires and the like implanted through blood vessels, and the driving unit is made of flexible materials so as to realize remote operation. The distance varies according to the use scene, for example, the distance can be about 0.5m when the device passes through a neck blood vessel, and about 1m when the device passes through a thigh blood vessel. Specifically, as shown in fig. 1, the knotting apparatus includes an inner core unit 102, an upper portion of an inner hole of which is used for threading a cable 105, and a lower portion of the inner hole is provided with the knotting unit. When in use, the knotting unit moves in the inner hole to control the working state of the cable; some component part of the knotting unit, for example, can be moved up and down in the radial direction of the inner bore to squeeze the cable or unlock the cable. The device further comprises a driving unit for controlling the state of the knotting unit. In order to facilitate the operation of the instrument, reduce the number of knots of cables implanted in the human body by medical staff, the driving unit according to one embodiment of the present invention has flexibility, so that the driving unit can be deformed along a blood vessel, extend along a blood vessel channel, and finally achieve a knot or locking operation of the cables in a target area. As shown in fig. 1, during the knotting operation, the driving unit moves axially in the blood vessel to push the knotting unit to squeeze the cable to the inner wall of the inner hole, for example, the cable is squeezed to the upper wall surface of the inner hole as shown in fig. 1, so as to fix the cable, i.e. complete the knotting operation. It should be noted that: the upper part of the inner hole of the inner core unit is used for penetrating the cable, and the knotting unit is arranged at the lower part of the inner hole, so that the inner space of the inner core unit is fully utilized to assemble the knotting unit, the structural size is not only increased, the volume of the instrument reserved in the human body is reduced, but also the operation risk and the burden of a patient are reduced. Furthermore, the driving unit of the invention adopts a flexible structure, and the inner core unit with a miniaturized design can lead the instrument to extend along the bending of the blood vessel, thereby realizing the knotting of the cable in a long distance and a small space.
Alternatively, as shown in fig. 1 and 4-5, the knotting unit includes a pressing plate 104, a sliding block 103 and a driving screw 101, where a contact surface between a lower portion of the pressing plate 104 and an upper portion of the sliding block is an inclined surface, specifically an upper top surface 301 of the sliding block shown in fig. 4, and a lower bottom surface 404 of the pressing plate shown in fig. 5. After assembly, and in actual use, the upper top surface 301 and the lower bottom surface 404 are attached to form the inclined surface. The included angle between the inclined plane and the axis of the core unit is alpha, namely alpha angle shown in fig. 4 and 5. The drive screw 101 is threadedly coupled to the core unit, and in one embodiment shown in fig. 1 to 3, a second screw hole 201 is provided at a lower portion of the core unit, and the drive screw 101 is threadedly coupled to the second screw hole 201. The front face of the drive screw 101 is in contact with the rear face of the slider 103 so that in use the drive screw 101 can be rotated forward to push the slider 103 into movement. Since the inclined surface has an angle alpha, the slide block 103 lifts the pressing plate 104 to control the working state of the cable 105; for example, the cable 105 is abutted against the top wall surface of the inner hole of the core unit, and knotting or locking of the cable is achieved. The self-locking between the sliding block and the pressing plate can be realized by reasonably setting the size of the alpha angle. It should be noted that: through the thread self-locking structure of the driving screw and the inclined plane self-locking structure between the sliding block and the pressing plate, double self-locking is formed, and the knotting reliability and safety are improved.
Alternatively, in the embodiment shown in fig. 4-5, the angle between the inclined surface and the axis of the core unit is 10 ° to 15 °. In actual use, the threads of the driving screw 101 and the threads of the threaded through hole of the inner core unit can be self-locked, so that the slide block is positioned, and finally, the position of the pressing plate 104 is locked. In order to avoid the loosening of the self-locking structure caused by the clearance between the threads (such as the clearance caused by the machining error), and reduce the knotting quality, in one embodiment of the present invention, the preferred angle α is 10 ° to 15 °, and the smaller included angle can ensure the self-locking between the pressing plate and the sliding block, that is, ensure that the pressing plate and the sliding block cannot move along the inclined plane after the knotting is completed. It will be appreciated that the angle α may be appropriately adjusted to achieve a desired self-locking effect, depending on the physical properties of the material, particularly the surface roughness caused by the machining process. The angle is properly adjusted so as to quickly lift the pressing plate to achieve the purpose of knotting; or the included angle is properly reduced, and at the moment, the knotting speed or efficiency is reduced, but the self-locking effect of the inclined plane is improved.
Alternatively, in one embodiment as shown in fig. 13, the slider is a hemisphere 1203, and the front end surface of the driving screw is fixedly connected to the rear end surface of the hemisphere, or the driving screw and the hemisphere are an integrated element. The design can ensure that the driving screw rod controls the sliding block of the hemispheroid to advance or retreat, thereby repeatedly adjusting the knotting position. The design can flexibly adjust the knotting position to obtain the needed knotting position and improve the operation effect.
Optionally, in the embodiment shown in fig. 5, a connection portion 401, a protruding portion 402, and a threading portion 403 are sequentially disposed on the top of the pressing plate far from the inclined plane. Referring to fig. 1 to 3, the connection portion 401 is connected to the channel portion 202 of the inner hole, so that a threading channel is formed between the inner hole of the inner core unit and the upper surface of the pressing plate, and the cable 105 can be threaded through the threading channel. In practical use, the connection between the connection portion 401 and the channel portion may be a conventional fixed connection, such as welding, gluing, etc. The boss 402 may be provided in one or more, and its top surface may be a cambered surface, a plane surface, a conical surface, or the like, through which the cable is pressed to be abutted against the inner wall of the inner hole of the core unit. The threading part 403 may be a smooth plane, and has a certain included angle with the axis of the core unit, so as to guide the cable to quickly and conveniently penetrate into the threading channel. As shown in fig. 7, the number of cables may be plural, and is not limited to one. It should be noted that: after the connecting part of the pressing plate is connected with the channel part of the inner hole of the inner core unit, a threading channel is formed between the inner hole and the upper surface of the pressing plate; the threading part is used for guiding the cable to penetrate into the threading channel; the design is convenient for external threading, can penetrate into a plurality of cables simultaneously, and is convenient for synchronously locking the cables.
Alternatively, as shown in FIGS. 1 and 8, in a longitudinal section of the knotting apparatus (i.e., in the section shown in FIG. 8), the longitudinal distance b between the boss and the inner hole of the core unit is smaller than the longitudinal distance a between both ends of the inclined surface of the pressing plate. I.e., distance a is greater than distance b as shown in fig. 8, thereby limiting the sliding distance of the slider within the internal bore to avoid the slider from disengaging the internal bore. As shown in fig. 1 and 3, the inner bore of the core unit has a stepped slope 204 therein, and the slope 204 is engaged with the lower bottom surface 404. Further, a groove 205 is provided in the inner hole, and the slider is fitted in the groove and positioned by the side of the groove to move along the axial direction of the groove.
Alternatively, as shown in fig. 1,11-12, the rear end of the driving screw 101 is detachably connected with the front end of the driving rod 108 in the driving unit in a snap-fit manner; the driving rod 108 comprises a buckling part 901 and a torsion-resistant flexible part 902, wherein the buckling part is provided with a buckle to realize buckling connection with the driving screw, and the torsion-resistant flexible part controls the driving screw to rotate so as to push the sliding block to move. In one embodiment of the invention, the drive rod is characterized in most ways by a torsion-resistant flexible portion, thereby ensuring that the knotting device can extend along the curve of the blood vessel, while having a torsion-resistant characteristic that ensures that the drive rod is capable of transmitting torque. That is, the operator may twist the end of the drive rod distally, transmitting torque to the catch 901, thereby rotating the drive screw 101. The driving screw 101 and the fastening portion 901 have the same fastening structure, and have a protrusion structure and a fastening groove 1002, so that the fastening can be realized by the fastening. Fig. 12 further shows a screw thread structure 1001 of the outer surface of the drive screw for screw-coupling with the core unit.
Optionally, as shown in fig. 1, the drive unit further comprises a connecting element 106, a connecting rod 107 and a braided hose 109. Wherein, the connecting rod 107 and the braided hose 109 are flexible structures, ensuring that the knotting apparatus can extend along the curvature of the blood vessel. As shown in fig. 1 and 6, the connection rod 107 is screw-coupled with the core unit after passing through the first through hole 601 of the connection member 106. The front end surface of the braided hose 109 is fixedly connected to the rear end surface of the connecting member 106, for example, by welding or the like. The inner hole of the braided hose 109 is formed to pass through the second through hole 602 of the connecting element 106, and the drive screw and the drive rod are provided in the through hole so as to be rotatable and movable therein. The snap connection is located in the second through hole to be restrained by the inner wall of the second through hole. In actual use, the length of the second through hole 602 needs to be reasonably designed, so that the buckle connection is ensured to be always positioned in the second through hole in use during knotting operation, and therefore the buckle connection is restrained by the inner wall of the second through hole, and the separation of the buckle connection is avoided. Further, as shown in fig. 6, the front end face of the connection element is of a stepped structure, and the rear end face of the core unit is also of a stepped structure. The two step structures are used in cooperation so that the front end face of the connecting element abuts against the rear end face of the core unit. The rear end face of the connecting member abuts against the step face of the connecting rod so that the connecting member is fixed between the connecting rod and the core unit. Specifically, referring to fig. 1-2 and 10, the stepped structure of the core unit is provided at an upper portion thereof with a first screw hole 203 and at a lower portion thereof with a second screw hole 201, and the connecting rod includes a first connection section 703, a stepped surface 702 and a second connection section 701, wherein the diameter of the first connection section is larger than that of the second connection section. The second connection section has a screw section so as to be connected with the first screw hole 203 of the core unit. In use, after the second connection section 701 is screwed with the first threaded hole 203, the rear end face of the connection element abuts against the step face 702 of the connection rod to fix the connection element between the connection rod and the core unit. When knotting, each element can be assembled according to the structure shown in fig. 1, and a cable to be knotted is threaded into the knotting device, and specific threading details are shown in fig. 7 and 9. The drive rod 108 may then be rotated to effect knotting.
According to a second aspect of embodiments of the present invention, a method of using a transvascular knotting device is provided. The knotting apparatus operated by the method of use according to the second aspect is the same as that described in the first aspect. The using method comprises the following steps: the inner core unit is provided with a knotting unit at the lower part, and the upper part of the inner hole is used for penetrating the cable; the knotting unit moves in the inner hole to control the working state of the cable; a driving unit for controlling the knotting unit to move; the driving unit is flexible to extend along the deformation of the blood vessel, and when the device is used, the driving unit is controlled to move in the blood vessel so as to push the knotting unit to squeeze the cable to the inner wall of the inner hole, so that knotting of the cable is realized.
Optionally, the unit of knoing include clamp plate, slider and drive screw, wherein, the contact surface between the lower part of clamp plate and the upper portion of slider is the inclined plane, drive screw and inner core unit threaded connection, and drive screw's preceding terminal surface and the rear end face contact of slider, drive screw rotates in the inner core unit in order to promote the slider and remove, makes the clamp plate lifting in order to control the operating condition of cable.
Optionally, the included angle between the inclined plane and the axis of the inner core unit is 10-15 degrees.
Optionally, the sliding block is a hemispherical body, and the front end surface of the driving screw is fixedly connected with the rear end surface of the hemispherical body, or the driving screw and the hemispherical body are integrated.
Optionally, a connecting part, a protruding part and a threading part are sequentially arranged on the top of the pressing plate far away from the inclined plane,
the connecting part is connected with the channel part of the inner hole of the inner core unit, and then a threading channel is formed between the inner hole and the upper surface of the pressing plate;
the protruding part is used for extruding the cable;
the threading part is used for guiding the cable to penetrate into the threading channel.
Optionally, in a longitudinal section of the knotting apparatus, a longitudinal distance between the protrusion and the inner hole of the inner core unit is smaller than a longitudinal distance between both ends of the inclined surface of the pressing plate, so as to prevent the slider from being separated from the inner hole.
Optionally, the rear end of the driving screw is detachably connected with the front end of the driving rod in the driving unit through a buckle; the driving rod comprises a buckling part and a torsion-resistant flexible part, wherein the buckling part is provided with a buckle to realize buckling connection with the driving screw, and the torsion-resistant flexible part controls the driving screw to rotate to control the position of the sliding block.
Optionally, the drive unit further comprises a connecting element, a connecting rod and a braided hose; wherein, the liquid crystal display device comprises a liquid crystal display device,
the connecting rod passes through the first through hole of the connecting element and is in threaded connection with the inner core unit;
the front end face of the braided hose is fixedly connected with the rear end face of the connecting element, an inner hole of the braided hose is communicated with the second through hole of the connecting element to form a through hole, and the driving screw rod and the driving rod are arranged in the through hole; the snap connection is located in the second through hole to be restrained by the inner wall of the second through hole;
the front end face of the connecting element abuts against the rear end face of the core unit, and the rear end face of the connecting element abuts against the step face of the connecting rod to fix the connecting element between the connecting rod and the core unit.
Alternatively, when knotting, the driving rod 108 is turned to make the driving screw 101 rotate synchronously, and the driving screw threads are screwed in to push the sliding block to advance. The inclined contact position between the pressing plate 104 and the sliding block 103 is changed to enable the front end of the pressing plate to be lifted, and the cable is extruded by the protruding part to be fixed. The invention adopts a double self-locking structure of the thread and the inclined plane to ensure the knotting stability. After the knotting is completed, the connection rod 107 is rotated to be separated from the core unit; then the braided hose and the connecting element are withdrawn to release the snap connection between the drive rod 108 and the drive screw 101 from external restraint; finally, the buckle connection between the driving rod and the driving screw rod is released, and the driving rod is removed. The part left in the human body is shown in fig. 7. After the evacuation is completed, the redundant cables can be trimmed by using a wire trimming device. As shown in fig. 1 to 13, referring particularly to fig. 7, the present invention makes full use of the internal structure and space of the core unit and the assembly of the respective elements, ensuring that the diameter of the structure to be left in the human body is 5mm or less and the axial length is 5mm or less; the size of the indwelling portion is very small, and burden of a patient and postoperative risk are reduced.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives can occur depending upon design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (7)
1. A transvascular knotting device comprising:
the inner core unit is provided with a knotting unit at the lower part, and the upper part of the inner hole is used for penetrating the cable;
the knotting unit moves in the inner hole to control the working state of the cable;
a driving unit for controlling the knotting unit to move;
the method is characterized in that:
the driving unit is flexible to extend along the deformation of the blood vessel, and moves in the blood vessel to push the knotting unit to squeeze the cable to the inner wall of the inner hole so as to knotte the cable;
the knotting unit comprises a driving screw;
the driving unit comprises a connecting element, a connecting rod and a braided hose; wherein, the liquid crystal display device comprises a liquid crystal display device,
the connecting rod passes through the first through hole of the connecting element and is in threaded connection with the inner core unit;
the front end face of the braided hose is fixedly connected with the rear end face of the connecting element, an inner hole of the braided hose is communicated with the second through hole of the connecting element to form a through hole, and the driving screw rod and the driving rod are arranged in the through hole;
the rear end of the driving screw is detachably connected with the front end of the driving rod in the driving unit through a buckle; the snap connection is located in the second through hole to be restrained by the inner wall of the second through hole;
the front end face of the connecting element abuts against the rear end face of the core unit, and the rear end face of the connecting element abuts against the step face of the connecting rod to fix the connecting element between the connecting rod and the core unit.
2. The knotting apparatus of claim 1, wherein the knotting device comprises a handle,
the knotting unit comprises a pressing plate and a sliding block, wherein,
the contact surface between the lower part of the pressing plate and the upper part of the sliding block is an inclined surface, the driving screw is in threaded connection with the inner core unit, and the front end surface of the driving screw is in contact with the rear end surface of the sliding block so as to push the sliding block to lift the pressing plate to control the working state of the cable.
3. The knotting apparatus of claim 2, wherein the knotting device comprises a handle,
the included angle between the inclined plane and the axis of the inner core unit is 10-15 degrees.
4. The knotting apparatus of claim 2, wherein the knotting device comprises a handle,
the sliding block is a hemispherical body, the front end face of the driving screw is fixedly connected with the rear end face of the hemispherical body, or the driving screw and the hemispherical body are integrated.
5. The knotting apparatus of claim 2, wherein the knotting device comprises a handle,
the top of the pressing plate far away from the inclined plane is sequentially provided with a connecting part, a protruding part and a threading part, wherein,
after the connecting part is connected with the channel part of the inner hole, a threading channel is formed between the inner hole and the upper surface of the pressing plate;
the protruding part is used for extruding the cable;
the threading part is used for guiding the cable to penetrate into the threading channel.
6. The knotting apparatus of claim 2, wherein the knotting device comprises a handle,
in the longitudinal section of the knotting device, the longitudinal distance between the protruding part and the inner hole of the inner core unit is smaller than the longitudinal distance between two ends of the inclined plane of the pressing plate, so that the sliding block is prevented from being separated from the inner hole.
7. The knotting apparatus of claim 2 or 3, wherein,
the driving rod comprises a buckling part and a torsion-resistant flexible part, wherein the buckling part is provided with a buckle to realize buckling connection with the driving screw, and the torsion-resistant flexible part controls the driving screw to rotate so as to push the sliding block to move.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311151031.2A CN117281562A (en) | 2021-10-29 | 2021-10-29 | Transvascular knotting device and application method thereof |
| CN202111267751.6A CN114027902B (en) | 2021-10-29 | 2021-10-29 | Transvascular knotting device and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111267751.6A CN114027902B (en) | 2021-10-29 | 2021-10-29 | Transvascular knotting device and application method thereof |
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| CN202311151031.2A Division CN117281562A (en) | 2021-10-29 | 2021-10-29 | Transvascular knotting device and application method thereof |
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| Publication Number | Publication Date |
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| CN114027902A CN114027902A (en) | 2022-02-11 |
| CN114027902B true CN114027902B (en) | 2023-10-27 |
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| CN202311151031.2A Pending CN117281562A (en) | 2021-10-29 | 2021-10-29 | Transvascular knotting device and application method thereof |
| CN202111267751.6A Active CN114027902B (en) | 2021-10-29 | 2021-10-29 | Transvascular knotting device and application method thereof |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311151031.2A Pending CN117281562A (en) | 2021-10-29 | 2021-10-29 | Transvascular knotting device and application method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0795983A (en) * | 1993-07-28 | 1995-04-11 | Terumo Corp | Knot forming device |
| CN201219907Y (en) * | 2008-07-03 | 2009-04-15 | 华斌 | Blind type suture knotter |
| CN212630823U (en) * | 2020-07-06 | 2021-03-02 | 杭州德晋医疗科技有限公司 | Bendable suture locking device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8491629B2 (en) * | 2008-02-15 | 2013-07-23 | Rex Medical | Vascular hole closure delivery device |
-
2021
- 2021-10-29 CN CN202311151031.2A patent/CN117281562A/en active Pending
- 2021-10-29 CN CN202111267751.6A patent/CN114027902B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0795983A (en) * | 1993-07-28 | 1995-04-11 | Terumo Corp | Knot forming device |
| CN201219907Y (en) * | 2008-07-03 | 2009-04-15 | 华斌 | Blind type suture knotter |
| CN212630823U (en) * | 2020-07-06 | 2021-03-02 | 杭州德晋医疗科技有限公司 | Bendable suture locking device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117281562A (en) | 2023-12-26 |
| CN114027902A (en) | 2022-02-11 |
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Address after: 201207 Room 303, building 5, No. 1158, Jiuting Central Road, Jiuting Town, Songjiang District, Shanghai Applicant after: Shanghai Huihe Medical Technology Co.,Ltd. Address before: 201207 Room 303, building 5, No. 1158, Jiuting Central Road, Jiuting Town, Songjiang District, Shanghai Applicant before: Shanghai Huihe Medical Technology Co.,Ltd. |
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