CN116269943B - Valve release assembly and valve conveying device - Google Patents
Valve release assembly and valve conveying device Download PDFInfo
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- CN116269943B CN116269943B CN202310572705.XA CN202310572705A CN116269943B CN 116269943 B CN116269943 B CN 116269943B CN 202310572705 A CN202310572705 A CN 202310572705A CN 116269943 B CN116269943 B CN 116269943B
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- 238000007789 sealing Methods 0.000 claims description 15
- 239000000306 component Substances 0.000 claims description 10
- 239000008358 core component Substances 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 35
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 9
- 230000009471 action Effects 0.000 description 12
- 239000000463 material Substances 0.000 description 9
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910001000 nickel titanium Inorganic materials 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000002513 implantation Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 229920002614 Polyether block amide Polymers 0.000 description 4
- 230000002792 vascular Effects 0.000 description 4
- 210000003709 heart valve Anatomy 0.000 description 3
- 244000208734 Pisonia aculeata Species 0.000 description 2
- 229920001400 block copolymer Polymers 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000007943 implant Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000002107 myocardial effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—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
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- Health & Medical Sciences (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Prostheses (AREA)
Abstract
The invention provides a valve release assembly and a device for conveying a valve, wherein the valve release assembly can realize control of valve release speed and achieve the aim of accurate release; the valve conveying device can realize valve release and recovery after full release, and can control valve release speed in the release process, and avoid the phenomenon of valve flying during release, thereby realizing valve accurate release and recovery.
Description
Technical Field
The invention belongs to the technical field of valve implantation, relates to a valve release device, and particularly relates to a valve release assembly and a valve conveying device.
Background
As transcatheter valve replacement techniques (TAVI and TMVI) have matured, the clinical use of interventional prosthetic heart valves (hereinafter referred to as "interventional valves") has increased. How to deliver and accurately release the interventional valve at the target site with minimal trauma requires a valve delivery system that is simple to operate and accurate to control.
Currently, interventional valves are largely classified into two types, balloon-expandable and self-expanding, according to their release mechanisms. Regardless of the type of interventional valve, which is preloaded in the catheter of the corresponding delivery system, after being advanced into the body via the catheter and delivered to the target site, the constraining member is withdrawn in steps, and the interventional valve is then released and deployed and secured in the target site. However, sometimes after the interventional valve is delivered to the target position, the release speed is too high due to insufficient control force of the delivery system, and the valve fixing position is found to be not ideal after the valve is unfolded and fixed, but cannot be adjusted again. Thus, there is a need for a delivery system that can be retrieved into the catheter when the valve is fully or partially released but not yet released from the system, and then released again after being adjusted to the desired position, thus ensuring that the valve is secured in the optimal position, yet the functionality of existing product delivery systems remains lacking in this regard.
CN1961847a discloses a prosthetic heart valve and its delivery device, comprising a tubular mesh stent, valve leaflets connected to the middle section of the mesh stent, a sealing membrane covering the mesh stent, and an X-ray impermeable marker and a flexible coupling ring arranged on the mesh stent. The delivery device comprises a catheter head, an inner tube, a proximal controller, a middle tube, a guide wire tube, an outer protection mechanism, at least one locking wire and at least one support stay wire. The delivery device can be used for delivering and placing the artificial heart valve, but the recovery of the valve cannot be realized, and the release speed of the valve cannot be controlled.
CN114081696a discloses a vascular stent releasing device comprising a foot rest, an inner tube, a middle tube and an outer tube. The foot rest is provided with a central section, a pushing section connected with one end of the central section and a recovery section connected with the other end of the central section, wherein the pushing section is provided with a pushing claw which elastically protrudes outwards along the radial direction towards the distal end direction, and the recovery section is provided with a recovery claw which elastically protrudes outwards along the radial direction towards the proximal end direction; the inner tube is fixedly connected with the central section of the foot rest; the middle pipe is sleeved outside the inner pipe and the foot rest, the far end of the middle pipe is provided with a first opening which is suitable for the pushing section of the foot rest to extend out, and the side wall of the far end of the middle pipe is provided with a second opening which is suitable for the recycling section of the foot rest to extend out; the outer tube is sleeved outside the middle tube, and the support is suitable for being accommodated between the outer tube and the middle tube.
The device can release and recover the vascular stent, but can not realize the accurate release of the vascular stent and can not control the release speed of the vascular stent.
CN115300187a discloses a stable release and recovery valve delivery system comprising an implantation instrument, a delivery catheter, a release device and a constraining device, the constraining device being movable away from and in limited proximity to the release device, the release device being connected to the delivery catheter; when the implantation instrument is preassembled, the implantation instrument is detachably connected with the restraint device, and the distal end part of the implantation instrument and the restraint device are limited in the release device; during release of the implant device, the constraint device moves away from the release device, and at the same time, during retrieval of the release device means, the second constraint member provides a force on the first constraint member to ensure that the first constraint member is stationary or moves in small amounts during passage of the release device through the implant device to maintain the first constraint member in contact with or adjacent the proximal end of the release device. The valve delivery system is capable of achieving release and recovery of the valve using springs to a configuration limited by elastic members, the control of which over valve release is to be further enhanced.
Disclosure of Invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide a valve release assembly and a device for delivering a valve; the valve release assembly can control the valve release speed, and achieves the aim of accurate release; the valve conveying device can realize valve release and recovery after full release, and can control valve release speed in the release process, and avoid the phenomenon of valve flying during release, thereby realizing valve accurate release and recovery.
To achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a valve release assembly comprising a connection portion, a lock, a control portion, and a clip groove connection;
the connecting part comprises a fixing piece; one end of the fixing piece is provided with a connecting piece, and the other end of the fixing piece is connected with the locking piece;
the control part comprises a base; one end of the base is provided with a control piece, and the other end of the base is connected with the clamping groove connecting piece;
the locking piece is provided with a through hole corresponding to the control piece; the control piece penetrates through the corresponding through hole of the lock piece and is distributed on the inner side of the connecting piece.
"distal" in the present invention refers to the end that is distal from the operator and "proximal" in the present invention refers to the end that is proximal to the operator. Correspondingly, "distal" refers to the end that is closer to the patient and "proximal" refers to the end that is farther from the patient.
When the valve release assembly is applied, the supporting legs of the valve sequentially penetrate through the connecting piece and the control piece from the outer side to the inner side along the radial direction, and when the valve needs to be released, the control part moves proximally relative to the connecting part, so that the supporting legs are firstly separated from the control piece. The valve is made of nickel-titanium material with memory metal property, and the supporting legs are further separated from the connecting parts under the action of self-expansion force, so that the valve is released step by step.
The valve release assembly provided by the invention has a simple structure, and can realize the step release of the valve, so that the problem of flying of the valve during release is solved, and the valve release is more accurate.
Preferably, the opposite ends of the fixing piece setting connecting piece are provided with first clamping pieces; the first clamping piece is clamped with the locking piece.
The shape of the first clamping piece is any shape capable of being clamped with the locking piece, and the outer wall of the locking piece is provided with a limit groove corresponding to the shape of the first clamping piece; illustratively, the first clamping member of the present invention includes, but is not limited to, a T-head.
Preferably, a second clamping piece is arranged at the opposite end of the base setting control piece; the second clamping piece is clamped with the clamping groove connecting piece.
The shape of the second clamping piece is any shape capable of realizing clamping with the clamping groove connecting piece, and the outer wall of the clamping groove connecting piece is provided with a limit groove corresponding to the shape of the second clamping piece; illustratively, the second clip of the present invention includes, but is not limited to, a T-head.
The T-shaped head is used, so that the clamping connection is firmer, and the valve is favorably and accurately released.
Preferably, the number of said connectors is the same as the number of control members.
As a preferable technical scheme of the invention, the number of the connecting pieces is the same as that of the control pieces. Further, the number of connectors is the same as the number of valve legs.
Preferably, the connector comprises a connection extension and a connection ring; the proximal end of the connecting extension piece is connected with the fixing piece, and the distal end is connected with the connecting ring.
Preferably, the connectors are evenly distributed; further preferably, the connecting rings in the connecting part are distributed in a staggered manner in a step.
Preferably, the control member comprises a control extension; the proximal end of the control extension piece is connected with the base, and the distal end is provided with a clamping groove.
Preferably, the control members are uniformly distributed; further preferably, the locking grooves in the control part are distributed in a staggered manner.
As the preferable technical scheme of the valve release assembly, when the valve release assembly is applied, the supporting legs of the valve sequentially penetrate through the connecting ring and the clamping groove from the outer side to the inner side along the radial direction, and when the valve needs to be released, the control part moves proximally relative to the connecting part, so that the supporting legs are separated from the clamping groove at first. The valve is made of nickel-titanium material with memory metal property, and the supporting legs are further separated from the connecting ring under the action of self-expansion force, so that the valve is released step by step.
In a second aspect, the present invention provides a device for delivering a valve, the device comprising a valve release assembly according to the first aspect.
Preferably, the device comprises a core assembly, a handle assembly, a release assembly, and a withdrawal assembly;
the inner core assembly comprises a guide head, an inner core, a connecting part, a locking piece and an inner guide pipe; one end of the inner core is fixedly connected with the guide head, and the other end of the inner core is connected with the locking piece; the opposite end of the lock piece, which is connected with the inner core, is connected with the inner guide pipe;
the handle assembly comprises a front handle shell, a sheath tube, a sheath fixing piece and a handle rotating piece; the inner core component is arranged inside the outer sheath tube; the outer sheath tube is connected with an outer sheath fixing piece arranged in the front handle shell; the handle rotating piece is in spiral connection with the outer sheath fixing piece and rotates to drive the outer sheath fixing piece to move axially;
the release assembly comprises a control part, a pushing tube and a pushing handle; one end of the pushing pipe is connected with the clamping groove connecting piece, and the other end of the pushing pipe is connected with the pushing handle; the pushing handle controls the pushing tube to move along the axial direction;
the shell of the pushing handle is connected with the front handle shell through an internal shell connecting piece;
the withdrawing component comprises a fixed guide rod, a pushing pipe fixing piece and a withdrawing knob; the pushing tube fixing piece is in threaded fit with the withdrawing knob; one end of the fixed guide rod is connected with the shell connecting piece, and the other end of the fixed guide rod is connected with the pushing pipe fixing piece in a sliding manner.
In the valve delivery device of the invention, the inner core component is used for fixing the valve; the handle component is used for controlling the recovery and release of the outer sheath; the release component is used for adjusting the connection between the control part and the valve support leg; the function of the retraction assembly is to retract the inner core assembly into the outer sheath after valve release is completed and withdraw the inner core assembly and the outer sheath together.
The valve conveying device is simple in structure, all parts are matched with each other, release and recovery after full release of the valve can be achieved, and accurate release of the valve can be achieved; the recovery after full release refers to recovery of the valve after full expansion, with the legs still connected to the connector. The handle rotating piece in the handle assembly rotates to drive the outer sheath fixing piece to axially move, so that the outer sheath tube axially moves, and further release and recovery of a valve fixed by the inner core assembly are realized; the pushing handle in the release assembly controls the pushing tube to move along the axial direction, so that the relative displacement of the control part and the connecting part along the axial direction is realized, the step-by-step separation of the valve support legs, the control part and the connecting part is realized, the step-by-step stable release of the valve is realized, and the full release recovery after the valve is completely expanded is also facilitated; the setting of the quick-release assembly can realize quick recovery of the delivery system after the valve is released in place, so that the guide head is quickly withdrawn into the sheath tube and withdrawn out of the body along with the delivery system, the guide head is prevented from falling into the body under the action of external force in the withdrawal process, the setting efficiency of the valve is improved, and further the pain of a patient is reduced.
Preferably, the inner core assembly further comprises a baffle disposed outside the inner conduit;
one end of the push pipe, which is connected with the clamping groove connecting piece, is provided with a U-shaped groove; the stopper cooperates with the U-shaped groove to limit the circumferential rotation of the pushing tube.
The inner core assembly of the invention realizes the limitation of circumferential rotation of the pushing tube by arranging the baffle piece, and avoids the damage to the myocardial inner wall in the valve release process.
Preferably, the handle assembly further comprises an unlocking member; the unlocking piece is locked by axially moving the control handle rotating piece;
preferably, the unlocking piece is provided with a boss, one end of the handle rotating piece is provided with a limiting clamping groove, and the limiting clamping groove is matched with the boss to realize the rotation lock and the rotation unlocking of the handle rotating piece.
Preferably, the pushing handle comprises a pushing handle shell, a pushing pipe sealing cavity, a pushing pipe stroke piece and a tail end knob;
the proximal end of the pushing tube is connected with the pushing tube sealing cavity; the pushing tube sealing cavity is in threaded connection with the pushing tube travel piece so as to control the axial movement of the pushing tube through the rotation of the pushing tube travel thread;
the tail end knob is provided with a tail end boss; the pushing tube sealing cavity, the tail end knob and the tail end boss are positioned in the inner cavity of the pushing handle shell; the pushing tube stroke piece is positioned in the inner cavity of the boss at the tail end;
the inner cavity of the tail end boss is provided with a guide groove, the outer wall of the pushing tube travel piece is provided with a bulge, and the guide groove is matched with the bulge so that the pushing tube travel piece moves along the axial direction.
Preferably, the guide head is conical in shape.
The guide head of the present invention is made of materials conventional in the art, including but not limited to PEBAX (polyether amide block copolymer) elastomer. The guide head can avoid stabbing the inner wall of biological tissues.
Preferably, the connection mode of the sheath tube and the sheath fixing piece comprises any one or a combination of at least two of clamping, welding or bonding.
Compared with the prior art, the invention has the beneficial effects that:
(1) When the valve release component provided by the invention is matched with the nickel-titanium material with the memory metal characteristic, the valve and the valve release component can be released step by step under the action of self-expansion by utilizing the relative movement of the control part and the connecting part, so that the problem of flying of the valve during release is solved, and the valve release is more accurate;
(2) The valve conveying device is simple in structure, all parts are matched with each other, release and recovery after full release of the valve can be achieved, and accurate release of the valve can be achieved; the recovery after full release refers to recovery of the valve after full expansion, with the legs still connected to the connector. The handle rotating piece in the handle assembly rotates to drive the outer sheath fixing piece to axially move, so that the outer sheath tube axially moves, and further release and recovery of a valve fixed by the inner core assembly are realized; the pushing handle in the release assembly controls the pushing tube to move along the axial direction, so that the relative displacement of the control part and the connecting part along the axial direction is realized, the step-by-step separation of the valve support legs, the control part and the connecting part is realized, and the step-by-step stable release of the valve is realized; the setting of the quick-release assembly can realize quick recovery of the delivery system after the valve is released in place, so that the guide head is quickly withdrawn into the sheath tube and withdrawn out of the body along with the delivery system, the guide head is prevented from falling into the body under the action of external force in the withdrawal process, the setting efficiency of the valve is improved, and further the pain of a patient is reduced.
Drawings
FIG. 1 is a schematic view of the valve release assembly of example 1;
FIG. 2 is a schematic structural view of the lock member in embodiment 1;
fig. 3 is a schematic structural view of a connecting portion in embodiment 1;
fig. 4 is a schematic structural view of a control section in embodiment 1;
FIG. 5 is a schematic view of the connection of the valve leg to the connection portion and the control portion in embodiment 1;
FIG. 6 is a schematic view showing the structure of a valve delivery device in example 1;
fig. 7 is a schematic structural view of the core assembly in example 1;
FIG. 8 is a schematic view of the structure of the handle assembly of embodiment 1;
FIGS. 9 and 10 are schematic views showing the structure of the release assembly of embodiment 1;
FIG. 11 is a schematic view showing the structure of the pushing handle in the release assembly in embodiment 1;
fig. 12 is a schematic structural view of the pullback assembly of embodiment 1;
fig. 13 is a graph showing the connection relationship between the pullback member and the core member in example 1;
fig. 14 is a partial enlarged view of fig. 13.
Wherein: an inner core assembly; 11, a guide head; 12, an inner core; 13, a connecting part; 131, a connector; 132, a first clip; 14, locking piece; 15, an inner catheter; 16, a baffle; 2, a handle assembly; a front handle housing 21; 22, an outer sheath; 23, an outer sheath fixing member; 24, a handle rotation member; 25, unlocking piece; 3, releasing the assembly; 31, a control unit; 311, a control member; 312, a second clamping piece; 32, a clamping groove connecting piece; 33, pushing the tube; 34, pushing the handle housing; 35, a bushing; 36, pushing the tube seal cavity; 37, pushing the tube travel member; 38, a tail end knob; 4, a quick-release assembly; 41, fixing a guide rod; 42, pushing the tube fixing piece; 43, withdraw the knob.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present invention.
It should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
In one embodiment, the present invention provides a valve release assembly comprising a connection portion, a lock, a control portion, and a clip groove connection;
the connecting part comprises a fixing piece; one end of the fixing piece is provided with a connecting piece, and the other end of the fixing piece is connected with the locking piece;
the control part comprises a base; one end of the base is provided with a control piece, and the other end of the base is connected with the clamping groove connecting piece;
the locking piece is provided with a through hole corresponding to the control piece; the control piece penetrates through the corresponding through hole of the lock piece and is distributed on the inner side of the connecting piece.
When the valve release assembly is applied, the supporting legs of the valve sequentially penetrate through the connecting piece and the control piece from the outer side to the inner side along the radial direction, and when the valve needs to be released, the control part moves proximally relative to the connecting part, so that the supporting legs are firstly separated from the control piece. The valve is made of nickel-titanium material with memory metal property, and the supporting legs are further separated from the connecting parts under the action of self-expansion force, so that the valve is released step by step.
In some embodiments, the opposite end of the securing member arrangement connecting member is provided with a first snap-fit member; the first clamping piece is clamped with the locking piece.
In some embodiments, the first clip is a T-head.
In some embodiments, a second catch is provided at an opposite end of the base-setting control; the second clamping piece is clamped with the clamping groove connecting piece.
In some embodiments, the second clip is a T-head.
The T-shaped head is used, so that the clamping connection is firmer, and the valve is favorably and accurately released.
In certain embodiments, the number of connectors is the same as the number of controls.
In certain embodiments, the number of connectors is the same as the number of valve legs.
In certain embodiments, the connector comprises a connection extension and a connection ring; the proximal end of the connecting extension piece is connected with the fixing piece, and the distal end is connected with the connecting ring.
In some embodiments, the connecting pieces are uniformly distributed, and the connecting rings in the connecting parts are distributed in a step dislocation manner.
In certain embodiments, the control member comprises a control extension; the proximal end of the control extension piece is connected with the base, and the distal end is provided with a clamping groove.
In some embodiments, the control members are uniformly distributed, and the clamping grooves in the control portion are staggered in steps.
As the preferable technical scheme of the valve release assembly, when the valve release assembly is applied, the supporting legs of the valve sequentially penetrate through the connecting ring and the clamping groove from the outer side to the inner side along the radial direction, and when the valve needs to be released, the control part moves proximally relative to the connecting part, so that the supporting legs are separated from the clamping groove at first. The valve is made of nickel-titanium material with memory metal property, and the supporting legs are further separated from the connecting ring under the action of self-expansion force, so that the valve is released step by step.
In another embodiment of the present invention, a device for delivering a valve is provided, the device comprising the valve release assembly described above.
In certain embodiments, the device comprises a core assembly, a handle assembly, a release assembly, and a withdrawal assembly;
the inner core assembly comprises a guide head, an inner core, a connecting part, a locking piece and an inner guide pipe; one end of the inner core is fixedly connected with the guide head, and the other end of the inner core is connected with the locking piece; the opposite end of the lock piece, which is connected with the inner core, is connected with the inner guide pipe;
the handle assembly comprises a front handle shell, a sheath tube, a sheath fixing piece and a handle rotating piece; the inner core component is arranged inside the outer sheath tube; the outer sheath tube is connected with an outer sheath fixing piece arranged in the front handle shell; the handle rotating piece is in spiral connection with the outer sheath fixing piece and rotates to drive the outer sheath fixing piece to move axially;
the release assembly comprises a control part, a pushing tube and a pushing handle; one end of the pushing pipe is connected with the clamping groove connecting piece, and the other end of the pushing pipe is connected with the pushing handle; the pushing handle controls the pushing tube to move along the axial direction;
the shell of the pushing handle is connected with the front handle shell through an internal shell connecting piece;
the withdrawing component comprises a fixed guide rod, a pushing pipe fixing piece and a withdrawing knob; the pushing tube fixing piece is in threaded fit with the withdrawing knob; one end of the fixed guide rod is connected with the pushing pipe fixing piece, and the other end of the fixed guide rod is connected with the outer sheath fixing piece.
In the valve delivery device of the invention, the inner core component is used for fixing the valve; the handle component is used for controlling the recovery and release of the outer sheath; the release component is used for adjusting the connection between the control part and the valve support leg; the function of the retraction assembly is to retract the inner core assembly into the outer sheath after valve release is completed and withdraw the inner core assembly and the outer sheath together.
The valve conveying device is simple in structure, all parts are matched with each other, release and recovery after full release of the valve can be achieved, and accurate release of the valve can be achieved; the recovery after full release refers to recovery of the valve after full expansion, with the legs still connected to the connector. The handle rotating piece in the handle assembly rotates to drive the outer sheath fixing piece to axially move, so that the outer sheath tube axially moves, and further release and recovery of a valve fixed by the inner core assembly are realized; the pushing handle in the release assembly controls the pushing tube to move along the axial direction, so that the relative displacement of the control part and the connecting part along the axial direction is realized, the distribution and separation of the valve support legs, the control part and the connecting part are realized, and the stepwise stable release of the valve is realized; the setting of the quick-release assembly can realize quick recovery of the delivery system after the valve is released in place, so that the guide head is quickly withdrawn into the sheath tube and withdrawn out of the body along with the delivery system, the guide head is prevented from falling into the body under the action of external force in the withdrawal process, the setting efficiency of the valve is improved, and further the pain of a patient is reduced.
In certain embodiments, the inner core assembly further comprises a stop disposed outside of the inner conduit.
One end of the push pipe, which is connected with the clamping groove connecting piece, is provided with a U-shaped groove; the stopper cooperates with the U-shaped groove to limit the circumferential rotation of the pushing tube.
The inner core assembly of the invention realizes the limitation of circumferential rotation of the pushing tube by arranging the baffle piece, and avoids the damage to the inner wall of the blood vessel in the valve release process.
In certain embodiments, the handle assembly further comprises an unlocking member; the unlocking piece is locked by axially moving the rotation of the control handle rotating piece.
In some embodiments, the unlocking piece is provided with a boss, and one end of the handle rotating piece is provided with a limiting clamping groove, and the limiting clamping groove is matched with the boss to realize the rotation lock and the rotation unlocking of the handle rotating piece.
In certain embodiments, the push handle includes a push handle housing, a push tube seal cavity, a push tube stroke member, and a trailing end knob.
The proximal end of the pushing tube is connected with the pushing tube sealing cavity; the pushing tube sealing cavity is in threaded connection with the pushing tube travel piece so as to control axial movement of the pushing tube through rotation of the pushing tube travel piece.
The tail end knob is provided with a tail end boss; the pushing tube sealing cavity, the tail end knob and the tail end boss are positioned in the inner cavity of the pushing handle shell; the pushing tube stroke piece is positioned in the inner cavity of the tail end boss.
The inner cavity of the tail end boss is provided with a guide groove, the outer wall of the pushing tube travel piece is provided with a bulge, and the guide groove is matched with the bulge so that the pushing tube travel piece moves along the axial direction.
In certain embodiments, the guide head is conical in shape.
The guide head of the present invention is made of materials conventional in the art, including but not limited to PEBAX (polyether amide block copolymer) elastomer. The guide head can avoid stabbing the inner wall of biological tissues.
In some embodiments, the connection between the sheath tube and the sheath fixing member comprises any one or a combination of at least two of clamping, welding or bonding.
Example 1
The present embodiment provides a device for delivering a valve, the device comprising a valve release assembly 3;
the valve release assembly is shown in fig. 1, and comprises a connecting part 13, a locking part 14, a control part 31 and a clamping groove connecting part 32; the connecting portion 13 includes a fixing member (see fig. 3); one end of the fixing piece is provided with uniformly distributed connecting pieces 131, the other end of the fixing piece is provided with first clamping pieces 132, and the first clamping pieces 132 are clamped with the locking pieces 14; the first clamping member 132 is a T-shaped head; the control part 31 comprises a base, wherein one end of the base is provided with uniformly distributed control pieces 311, and the other end of the base is provided with a second clamping piece 312 (see fig. 4), and the second clamping piece 312 is clamped with the clamping groove connecting piece 32; the second clamping member 312 is a T-shaped head; the locking member 14 is provided with a through hole corresponding to the control member 311 (see fig. 2); the control pieces 311 penetrate through corresponding through holes of the lock piece 14 and are distributed on the inner side of the connecting piece 131;
the connecting member 131 includes a connecting extension member and a connecting ring; the proximal end of the connecting extension piece is connected with the fixing piece, and the distal end of the connecting extension piece is connected with the connecting ring; the control 311 comprises a control extension; the proximal end of the control extension piece is connected with the base, and the distal end of the control extension piece is provided with a clamping groove;
the number of the connecting pieces 131, the number of the control pieces 311 and the number of the valve support legs are the same, and the connecting rings in the connecting part 13 are in step dislocation distribution, and the clamping grooves in the control part 31 are in step dislocation distribution.
When the valve release assembly is applied, the support legs of the valve sequentially pass through the connecting ring and the clamping groove from the outer side to the inner side along the radial direction (see fig. 5), and when the valve needs to be released, the control part 31 moves proximally relative to the connecting part 13, so that the support legs are firstly separated from the clamping groove. The valve is made of nickel-titanium material with memory metal characteristic, and the supporting legs are further separated from the connecting ring under the action of self-expansion force, so that the valve is released step by step.
The structure of the device is schematically shown in fig. 6, and comprises a core assembly 1, a handle assembly 2, a release assembly 3 and a withdrawing assembly 4;
the schematic structural diagram of the inner core assembly 1 is shown in fig. 7, and the inner core assembly comprises a conical guide head 11, an inner core 12, a connecting part 13, a locking piece 14 and an inner guide pipe 15; one end of the inner core 12 is fixedly connected with the guide head 11, and the other end is connected with the lock piece 14; the opposite end of the lock piece 14 connected with the inner core 12 is connected with an inner guide pipe 15; the inner core assembly 1 further comprises a baffle 16 arranged outside the inner conduit 15;
the handle assembly 2 is schematically shown in fig. 8, and comprises a front handle shell 21, a sheath tube 22, a sheath fixing piece 23 and a handle rotating piece 24; the inner core assembly 1 is arranged inside the outer sheath tube 22; the outer sheath tube 22 is adhered to an outer sheath fixing piece 23 arranged in the front handle shell 21; the handle rotating piece 24 is in spiral connection with the outer sheath fixing piece 23, and the handle rotating piece 24 rotates to drive the outer sheath fixing piece 23 to axially move;
the handle assembly 2 further comprises an unlocking piece 25, the unlocking piece 25 is provided with a boss, one end of the handle rotating piece 24 is provided with a limiting clamping groove, and the limiting clamping groove is matched with the boss to realize the rotation unlocking of the rotating lock of the handle rotating piece 24;
the schematic structure of the release assembly 3 is shown in fig. 9 and 10, and includes a control part 31, a pushing tube 33 and a pushing handle; one end of the pushing tube 33 is connected with the clamping groove connecting piece 32, and the other end is connected with the pushing handle; the pushing handle controls the pushing tube 33 to move axially; specific: the push handle (see fig. 11) includes a push handle housing 34, a bushing 35, a push tube seal cavity 36, a push tube stroke 37, and a tail knob 38; the proximal end of the pushing tube 33 is connected with a pushing tube sealing cavity 36; the pushing tube sealing cavity 36 is in threaded connection with the pushing tube travel piece 37 so as to control the axial movement of the pushing tube 33 through the rotation of the pushing tube 33 travel thread; the tail knob 38 is provided with a tail boss; the pushing tube sealing cavity 36, the tail end knob 38 and the tail end boss are positioned in the inner cavity of the pushing handle shell 34; the pushing tube travel piece 37 is positioned in the inner cavity of the tail end boss; the inner cavity of the tail end boss is provided with a guide groove, the outer wall of the pushing tube travel piece 37 is provided with a bulge, the guide groove is matched with the bulge so that when the pushing tube is retracted, the tail end knob 38 is kept still, and the pushing tube travel piece 37, the pushing tube 33, the bushing 35 and the pushing tube sealing cavity 36 axially move; a U-shaped groove is formed in one end of the pushing tube 33 connected with the clamping groove connecting piece 32; the baffle 16 is matched with the U-shaped groove to limit the circumferential rotation of the pushing tube 33;
the push handle shell 34 is connected with the front handle shell 21 through a shell connecting piece 131 of the inner cavity;
the retraction assembly 4 (see fig. 12) comprises a fixing guide rod 41, a pushing tube fixing piece 42 and a retraction knob 43, and the connection relation diagram of the retraction assembly and the inner core assembly 1 is shown in fig. 13; the outer surface of the push tube fixing piece 42 is provided with external threads which are matched with the internal threads of the withdrawing knob 43; one end of the fixed guide rod 41 is connected with the shell connecting piece 131, and the other end is connected with the pushing tube fixing piece 42 in a sliding manner; the interior of the push tube fixture 42 connects the bushing 35 and push tube seal cavity 36 as one piece (see fig. 14); rotating the retraction knob 43 causes the push tube holder 42 and its inner lumen components to move proximally, thereby retracting the inner core assembly 1 from the outer sheath 22; .
In the valve conveying device provided by the embodiment, the handle rotating piece 24 in the handle assembly 2 rotates to drive the outer sheath fixing piece 23 to axially move, so that the outer sheath tube 22 axially moves, and further, the release and recovery after the full release of the valve fixed by the inner core assembly 1 are realized; the pushing handle in the release assembly 3 controls the pushing tube 33 to move along the axial direction, so that the relative displacement of the control part 31 and the connecting part 13 along the axial direction is realized, the distribution and separation of the valve support legs, the control part 31 and the connecting part 13 are realized, and the stepwise stable release of the valve is realized; the quick recovery of the delivery system after the valve is released in place can be realized through the arrangement of the quick-withdrawing assembly 4, so that the guide head 11 is quickly withdrawn into the sheath tube and withdrawn out of the body along with the delivery system, the guide head 11 is prevented from falling into the body under the action of external force in the withdrawal process, the valve arrangement efficiency is improved, and the pain of a patient is further reduced. Therefore, the device for conveying the valve provided by the embodiment has a simple structure, and all parts are matched with each other, so that the valve can be released and recovered, and the valve can be accurately released.
In summary, when the valve release assembly provided by the invention is matched with the nickel-titanium material with the memory metal characteristic, the valve and the valve release assembly can be released step by step under the action of self-expansion by utilizing the relative movement of the control part and the connecting part, so that the problem of flying of the valve during release is solved, and the valve release is more accurate; the valve conveying device is simple in structure, all parts are matched with each other, release and recovery after full release of the valve can be achieved, and accurate release of the valve can be achieved; the recovery after full release refers to recovery of the valve after full expansion, with the legs still connected to the connector. The handle rotating piece in the handle assembly rotates to drive the outer sheath fixing piece to axially move, so that the outer sheath tube axially moves, and further release and recovery of a valve fixed by the inner core assembly are realized; the pushing handle in the release assembly controls the pushing tube to move along the axial direction, so that the relative displacement of the control part and the connecting part along the axial direction is realized, the step-by-step separation of the valve support legs, the control part and the connecting part is realized, and the step-by-step stable release of the valve is realized; the setting of the quick-release assembly can realize quick recovery of the delivery system after the valve is released in place, so that the guide head is quickly withdrawn into the sheath tube and withdrawn out of the body along with the delivery system, the guide head is prevented from falling into the body under the action of external force in the withdrawal process, the setting efficiency of the valve is improved, and further the pain of a patient is reduced.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and it should be apparent to those skilled in the art that any changes or substitutions that fall within the technical scope of the present invention disclosed herein are within the scope of the present invention.
Claims (9)
1. The valve release assembly is characterized by comprising a connecting part, a locking part, a control part and a clamping groove connecting part;
the connecting part comprises a fixing piece; one end of the fixing piece is provided with a connecting piece, and the other end of the fixing piece is connected with the locking piece; the connecting piece comprises a connecting extension piece and a connecting ring; the proximal end of the connecting extension piece is connected with the fixing piece, and the distal end of the connecting extension piece is connected with the connecting ring; the connecting pieces are uniformly distributed, and connecting rings of the connecting parts are distributed in a staggered manner in a step manner;
the control part comprises a base; one end of the base is provided with a control piece, and the other end of the base is connected with the clamping groove connecting piece; the control member includes a control extension; the proximal end of the control extension piece is connected with the base, and the distal end of the control extension piece is provided with a clamping groove; the control pieces are uniformly distributed, and the clamping grooves of the control part are distributed in a staggered manner in a stepped manner;
the locking piece is provided with a through hole corresponding to the control piece; the control piece penetrates through the corresponding through hole of the lock piece and is distributed on the inner side of the connecting piece.
2. The valve release assembly of claim 1, wherein the opposite end of the holder-provided connection is provided with a first clip; the first clamping piece is clamped with the locking piece;
the opposite end of the base provided with the control piece is provided with a second clamping piece; the second clamping piece is clamped with the clamping groove connecting piece.
3. A device system for delivering a valve, the device system comprising the valve release assembly of claim 1 or 2.
4. The device system of claim 3, wherein the device system comprises a core assembly, a handle assembly, a release assembly, and a withdrawal assembly;
the inner core assembly comprises a guide head, an inner core, a connecting part, a locking piece and an inner guide pipe; one end of the inner core is fixedly connected with the guide head, and the other end of the inner core is connected with the locking piece; the opposite end of the lock piece, which is connected with the inner core, is connected with the inner guide pipe;
the handle assembly comprises a front handle shell, a sheath tube, a sheath fixing piece and a handle rotating piece; the inner core component is arranged inside the outer sheath tube; the outer sheath tube is connected with an outer sheath fixing piece arranged in the front handle shell; the handle rotating piece is in spiral connection with the outer sheath fixing piece and rotates to drive the outer sheath fixing piece to move axially;
the release assembly comprises a control part, a pushing tube and a pushing handle; one end of the pushing pipe is connected with the clamping groove connecting piece, and the other end of the pushing pipe is connected with the pushing handle; the pushing handle controls the pushing tube to move along the axial direction;
the shell of the pushing handle is connected with the front handle shell through an internal shell connecting piece;
the withdrawing component comprises a fixed guide rod, a pushing pipe fixing piece and a withdrawing knob; the pushing tube fixing piece is in threaded fit with the withdrawing knob; one end of the fixed guide rod is connected with the shell connecting piece fixing piece, and the other end of the fixed guide rod is connected with the pushing pipe fixing piece in a sliding mode.
5. The device system of claim 4, wherein the inner core assembly further comprises a stop disposed outside of the inner conduit;
one end of the push pipe, which is connected with the clamping groove connecting piece, is provided with a U-shaped groove; the stopper cooperates with the U-shaped groove to limit the circumferential rotation of the pushing tube.
6. The device system of claim 4, wherein the handle assembly further comprises an unlocking member; the unlocking piece is locked by axially moving the rotation of the control handle rotating piece.
7. The device system of claim 4, wherein the push handle comprises a push handle housing, a push tube seal cavity, a push tube stroke member, and a trailing knob;
the proximal end of the pushing tube is connected with the pushing tube sealing cavity; the pushing tube sealing cavity is in threaded connection with the pushing tube travel piece so as to control the axial movement of the pushing tube through the rotation of the pushing tube travel thread;
the tail end knob is provided with a tail end boss; the pushing tube sealing cavity, the tail end knob and the tail end boss are positioned in the inner cavity of the pushing handle shell; the pushing tube stroke piece is positioned in the inner cavity of the boss at the tail end;
the inner cavity of the tail end boss is provided with a guide groove, the outer wall of the pushing tube travel piece is provided with a bulge, and the guide groove is matched with the bulge so that the pushing tube travel piece moves along the axial direction.
8. The device system of claim 4, wherein the guide head is conical in shape.
9. The device system of claim 4, wherein the means for connecting the sheath tube to the sheath mount comprises any one or a combination of at least two of a snap fit, a weld, or an adhesive.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310572705.XA CN116269943B (en) | 2023-05-22 | 2023-05-22 | Valve release assembly and valve conveying device |
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| CN202310572705.XA CN116269943B (en) | 2023-05-22 | 2023-05-22 | Valve release assembly and valve conveying device |
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| CN116269943A (en) | 2023-06-23 |
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