Press button type artificial valve conveying device and conveying methodTechnical Field
The invention belongs to the technical field of medical appliances, and particularly relates to a push-button type artificial valve conveying device and a conveying method.
Background
A heart valve refers to a valve between the atrium and ventricle or between the ventricle and artery. Valves play a critical role in the blood circulation activity that the heart never stops. Four valves are located in each individual heart. Namely the aortic valve linking the left ventricle and the aorta, the pulmonary valve linking the right ventricle and the pulmonary artery, the mitral valve linking the left atrium and the left ventricle, and the tricuspid valve linking the right atrium and the right ventricle. They all act as one-way valves, so that blood can only flow from one direction to the other and not back.
Heart valve disease is a common heart disease, and the main clinical manifestations of heart disease are that the valves of mitral valve, tricuspid valve, aortic valve and pulmonary valve are diseased due to rheumatic fever, mucosis, degenerative changes, congenital deformity, ischemic necrosis, infection or trauma, and the like, and the normal flow of blood flow is affected, so that abnormal heart functions are caused, and finally, the heart failure is caused by single-valve or multi-valve disease.
Heart valve repair or replacement under extracorporeal circulation is the standard treatment for heart valve disease. However, it is not tolerant to such a large surgery for elderly patients or patients with underlying diseases. Transcatheter prosthetic valve replacement has become a new treatment for the last 10 years. Compared with the traditional operation treatment, the transcatheter mitral valve replacement has the advantages of no need of chest opening, small trauma, quick recovery of patients and the like, so that the transcatheter mitral valve replacement is more suitable for the aged and patients with basic diseases.
Transcatheter heart valve replacement delivers the heart valve to the lesion site primarily by a delivery device. During operation, it is generally desirable for the conveyor to have different conveying speeds to achieve accurate positioning and quick release. Most of the existing conveying devices cannot realize accurate positioning and quick release at the same time, and the problems of complex structure and too many parts exist. For this reason, improvements are needed to overcome the shortcomings in practical applications.
Disclosure of Invention
In view of the foregoing drawbacks and deficiencies of the prior art, it is an object of the present invention to at least solve one or more of the above-mentioned problems of the prior art, in other words, to provide a push-button prosthetic valve delivery device and delivery method that meet one or more of the above-mentioned needs.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
A press button type artificial valve conveying device comprises a mandrel, an outer sheath tube, a screw rod, a first handle and a second handle, wherein the screw rod is arranged between the first handle and the second handle, the outer sheath tube is fixedly connected with the first handle, the mandrel penetrates through the outer sheath tube, the first handle and the second handle, a valve is arranged between the mandrel and the outer sheath tube in a loading mode, a knob, a connecting pipe and a press button assembly are arranged on the second handle, the screw rod drives the first handle and the outer sheath tube to move to the proximal end through rotating the knob so as to position the valve, and the connecting pipe drives the screw rod to move and links the first handle and the outer sheath tube to move to the proximal end through pressing the press button assembly to release the valve.
Preferably, a first sleeve and a second sleeve are arranged in the first handle, and the inner diameter of the first sleeve is larger than the outer diameter of the second sleeve.
As a preferable scheme, a step hole is arranged in the second sleeve, and the step hole is fixedly connected with the end part of the outer sheath tube.
Preferably, the screw is in threaded fit with the knob.
As a preferable scheme, the knob is provided with a latch, the connecting pipe is provided with a clamping groove, and the clamping groove is in clamping fit with the latch.
As the preferred scheme, press the button subassembly and include press the button lid, press the button base, the spring, spacing pipe, press the button base to be equipped with the through-hole, press button lid and press button base joint cooperation, spacing pipe pass the through-hole and with press button lid fixed connection, the spring is installed between spacing pipe and press button base.
As the preferred scheme, be equipped with first protruding structure and second protruding structure on the connecting pipe, be equipped with first spout in the second handle, first spout and first protruding structure sliding fit, spacing pipe internal diameter is greater than the protruding structure external diameter of second, and spacing pipe is outside the protruding structure of second.
As the preferable scheme, the second handle is provided with an open slot, the width of the open slot is larger than the diameter of the limiting pipe, and the limiting pipe is in sliding fit with the open slot.
The limiting pipe is provided with a limiting structure, the second handle is provided with a limiting groove, the limiting structure is movably matched with the limiting groove, the press button assembly is fixed with the second handle when the limiting structure is positioned in the limiting groove, and the press button assembly is in sliding fit with the second handle when the limiting structure is separated from the limiting groove.
The invention also provides a method for conveying the press button type artificial valve, which comprises the following steps:
(1) Loading a prosthetic valve between the mandrel and the outer sheath;
(2) The mandrel and the outer sheath are sent to an implantation position for pre-positioning;
(3) Slowly releasing the artificial valve by rotating the knob, and simultaneously adjusting the release position of the artificial valve;
(4) After the release position is determined, the push button assembly is pressed and pulled proximally to complete the rapid release of the prosthetic valve.
Compared with the prior art, the invention has the beneficial effects that:
The press button type artificial valve conveying device is convenient to operate, stable in operation, and capable of achieving accurate positioning and quick release of the artificial valve through combination of knob transmission and press button transmission.
The push-button type artificial valve conveying device is simple in structure, few in parts and easy to install, production cost and installation time can be reduced, and efficiency is improved.
The push button type artificial valve conveying device has a wide transmission stroke range and can be suitable for artificial valves with different lengths.
Drawings
FIG. 1 is a schematic diagram showing the overall structure of a conveying device according to a first embodiment of the present invention;
FIG. 2 is a schematic overall cross-sectional view of a conveyor according to a first embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a first handle according to a first embodiment of the present invention;
FIG. 4 is an exploded view of a first handle according to a first embodiment of the present invention;
FIG. 5 is a schematic view of a screw connection according to a first embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating the cooperation of a knob and a connection tube according to a first embodiment of the present invention;
FIG. 7 is a schematic view of a connecting pipe according to a first embodiment of the present invention;
FIG. 8 is a schematic view of a second handle according to a first embodiment of the present invention;
FIG. 9 is a schematic view of a first mounting portion of a second housing according to a first embodiment of the present invention;
FIG. 10 is a schematic cross-sectional view of a push button assembly in a limited position according to a first embodiment of the present invention;
FIG. 11 is a schematic cross-sectional view of a push button assembly in a disengaged position according to a first embodiment of the present invention;
In the figure: a1 sheath core assembly, 11 mandrels, 12 sheath tubes, 2 first handles, 21 first housing first mounting portions, 211 first spacing ribs, 212 second spacing ribs, 213 housing vent holes, 214 first handle threads, 215 sleeve spacing ribs, 216 screw spacing ribs, 22 first housing second mounting portions, 23 first sleeves, 231 first sleeve vent holes, 232 sleeve spacing slots, 24 second sleeves, 241 second sleeve vent holes, 242 stepped holes, 25 sealing gaskets, 26 screw caps, 3 knob assemblies, 31 screws, 311 screw threads, 312 first end faces, 3121 screw spacing slots, 313 second end faces, 32 knobs, 321 knob threads, 322 knob detents, 33 connecting tubes, 331 connecting tube detents, 332 fitting notches, 333 first projection structures, 334 second projection structures, 4 press knob assemblies, 41 press knob caps, 411 press knob cap detents, 42 springs, 43 press knob bases, 431 base slide bars, 432 base detents, 433 base through holes, 44 spacing tubes, 441 spacing structures, 442 tips, 5 second handles, 51 second housing second end faces, 51 second housing first mounting portions, 511, 5113, 5114 tail portions, 5152, 5113 tail portions, 5152, 5113, and 5112 tail portions.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.
Embodiment one:
As shown in fig. 1 to 2, the present embodiment provides a push button type prosthetic valve delivery device, which includes a sheath core assembly 1, a first handle 2, a knob assembly 3, a push button assembly 4, and a second handle 5. Wherein the sheath core assembly 1 comprises a mandrel 11 and an outer sheath tube 12, the first handle 2 comprises a first housing first mounting part 21, a first housing second mounting part 22, a first sleeve 23, a second sleeve 24, a sealing gasket 25 and a threaded cover 26, the knob assembly 3 comprises a screw 31, a knob 32 and a connecting tube 33, and the second handle 5 comprises a second housing 51 and a locking knob 52.
Specifically, the mandrel 11 is inserted into the sheath tube 12, the first handle 2, the knob assembly 3, and the second handle 5. The outer sheath 12 is fixedly connected with the second sleeve 24 inside the first handle 2, the first handle 2 is connected with the knob 32 through a screw rod 31, a first end face 312 of the screw rod 31 is fixedly connected with the first handle 2, a screw rod thread 311 is arranged on the screw rod 31, the screw rod thread 311 can be matched and connected with the knob thread 321, when the knob 32 is rotated, the screw rod 31 drives the first handle 2 and the outer sheath 12 to move from the distal end to the proximal end, the knob 32 is connected with a connecting pipe 33 through a buckle, the knob 32 can rotate relative to the connecting pipe 33, the connecting pipe 33 is sleeved in the second handle 5, the connecting pipe 33 can slide relative to the second handle 5, the connecting pipe 33 is provided with a second protrusion 334, the press button assembly 4 is of a hollow structure and sleeved in the second protrusion 334, one end of the second handle 5 is provided with a second handle tail thread 513, and the second handle tail thread 513 can be matched and connected with the locking knob 52.
As shown in fig. 3 to 4, the first handle 2 includes a first housing first mounting portion 21, a first housing second mounting portion 22, a first sleeve 23, a second sleeve 24, a sealing gasket 25, and a screw cap 26. The edges of the first mounting part 21 of the first shell and the second mounting part 22 of the first shell are provided with rabbets, so that the assembly is convenient.
The first handle threads 214 are provided at one ends of the first housing first mounting portion 21 and the first housing second mounting portion 22, respectively, and the first handle threads 214 can be engaged with threads inside the screw cap 26, and by screwing the screw cap 26, the first housing first mounting portion 21 and the first housing second mounting portion 22 can be assembled.
The outer diameter of the second sleeve 24 is smaller than the inner diameter of the first sleeve 23, the length of the second sleeve 24 is smaller than the length of the first sleeve 23, the first sleeve 23 can be sleeved outside the second sleeve 24, and a sealing gasket 25 is arranged between the first sleeve 23 and the second sleeve 24 and used for preventing blood from passing through during operation.
The second sleeve 24 is provided with a step hole 242, the step hole 242 can be connected with one end of the outer sheath 12 in a matching way, and the connection mode can be mechanical connection or glue connection, so that the connection firmness and tightness are required to be ensured.
The first sleeve 23 can be embedded into the first spacing rib 211 and the second spacing rib 212, the two sides of the first sleeve 23 are provided with spacing grooves 232, the spacing grooves 232 can be matched and connected with the sleeve spacing ribs 215 in the first handle shell 21, the fixing of the first sleeve 23 in the first handle 2 is realized, the first handle shell first installation part 21, the first sleeve 23 and the second sleeve 24 are respectively provided with a shell exhaust hole 213, a first sleeve exhaust hole 231 and a second sleeve exhaust hole 241 which are coaxially arranged, and the function of exhausting air in the first handle 1 is achieved.
As shown in fig. 5, the first end surface 312 of the screw 31 is of a conical structure, and is provided with a screw limiting groove 3121, the conical structure can be matched with the inner shape of the first handle 2, the screw limiting groove 3121 can be matched with the screw limiting rib 216 inside the first mounting portion 21 of the first housing, so that the screw 31 is fixed axially and circumferentially relative to the first handle 2, the screw 31 is provided with a screw thread 311, which can be designed into a single thread or a double thread according to practical requirements, and the second end surface 313 of the screw 31 is cylindrical.
As shown in fig. 6 to 7, one end of the knob 32 is provided with a knob thread 321, the knob thread 321 and the screw thread 311 can be mutually matched, when the knob 32 is rotated, the screw 31 can drive the first handle 2 and the outer sheath 12 to move from the distal end to the proximal end, in order to prevent the screw 31 from disengaging from the knob 32 in the use process, the outer diameter of the second end surface 313 of the screw 31 is larger than the minimum inner diameter of the knob thread 321, the knob 32 and the connecting pipe 33 are connected with the connecting pipe clamping groove 331 through the knob clamping teeth 322 in a matched manner, including but not limited to a snap connection manner, so that the axial fixation of the knob 32 and the connecting pipe 33 is realized, the circumferential rotatable connecting manner is realized, and the assembling notch 332 can be formed at one end of the connecting pipe 33, so as to play a role in convenient assembly.
As shown in fig. 7 to 8, the connecting pipe 33 is provided with a first protruding structure 333 and a second protruding structure 334, the first protruding structure 333 is disposed at two sides and bottom of the limiting pipe, two sides and bottom of the inner wall of the second handle 5 are provided with a first sliding groove 5111, the first protruding structure 333 can be embedded into the first sliding groove 5111 to realize circumferential fixation and axial movement of the connecting pipe 33 relative to the second handle 5, the second housing 51 is formed by splicing a first mounting portion 511 of the second housing and a second mounting portion 512 of the second housing, the tail portion of the second handle 5 is provided with a second handle tail thread 513, the second handle tail thread 513 can be matched with the locking knob 52, when the locking knob 52 is screwed, assembly of the first mounting portion 511 of the second housing and the second mounting portion 512 of the second housing can be realized, and instead, the first mounting portion 511 of the second housing and the second mounting portion 512 of the second housing can also be connected by means of bonding, buckling, or welding.
The press button assembly 4 is composed of a press button cover 41, a spring 42, a press button base 43 and a limiting tube 44, wherein the inner diameter of the limiting tube 44 is larger than the outer diameter of the second protruding structure 334 of the connecting tube 33, the limiting tube 44 is sleeved outside the second protruding structure 334, a base through hole 433 is arranged in the middle of the press button base 43, the limiting tube 44 can pass through the base through hole 433, and the top end 442 of the limiting tube is fixedly connected with the press button cover 41 in a connecting mode including but not limited to adhesive connection or snap connection.
Wherein, the press button cover 41 and the press button base 43 are connected with the base clamping groove 432 by the press button cover latch 411 in a buckling manner, the spring 42 is disposed between the inner wall of the press button cover 41 and the outer wall of the limiting tube 44, the top surface of the first mounting portion 511 of the second housing is provided with an open slot 5112, and the limiting tube 44 can pass through the open slot 5112, so that one end of the limiting tube 44 is located inside the second handle 5, and the other end is located outside the second handle 5.
The bottom of the button pressing base 43 is provided with a base slide bar 431, the base slide bar 431 can axially slide along the button pressing slide groove 5114 of the first mounting portion 511 of the second housing, a limiting groove 5113 is further formed in the first mounting portion 511 of the second housing, the shape of the limiting groove 5113 is the same as that of the limiting structure 441 of the limiting tube 44, and a certain gap is reserved between the limiting groove 5113 and the limiting structure 441, so that the limiting structure 441 can be embedded in the limiting groove 5113.
As shown in fig. 9, the limiting groove 5113 is located inside the first mounting portion 511 of the second housing and on two sides of the opening groove 5112, in order to facilitate the limiting structure 441 of the limiting tube 44 to be embedded into the limiting groove 5113, the inside of the limiting groove 5113 may be chamfered, two sides of the first mounting portion 511 of the second housing are provided with an upper half portion of the first sliding groove 5111, two sides of the second mounting portion 512 of the second housing are provided with a lower half portion of the first sliding groove 5111, a complete first sliding groove 5111 is formed by the combination of the first mounting portion 511 of the second housing and the second mounting portion 512 of the second housing, the tail thread 513 of the second handle 5 is provided with a groove, and when the locking screw 52 is used for screwing, a circumferential inward pretightening force is generated at the tail thread 513, so that the axial movement of the locking mandrel 11 is locked.
As shown in fig. 10, the second housing 51 is formed by splicing the first mounting portion 511 of the second housing and the second mounting portion 512 of the second housing, the first protrusion 333 of the connection tube 33 is embedded in the first sliding groove 5111, and the connection tube 33 can slide axially relative to the second handle 5 but cannot rotate circumferentially.
The limiting tube 44 is sleeved outside the second protruding structure 334 of the connecting tube 33, the limiting tube 44 can slide up and down relative to the second protruding structure 334, the limiting structure 441 of the limiting tube 44 is located in the limiting groove 5113 in the second handle 5, the top end of the limiting tube 44 penetrates through the opening groove 5112 and the base through hole 433 to be fixedly connected with the press button cover 41, when the press button cover 41 is not pressed, the limiting structure 441 of the limiting tube 44 is located in the limiting groove 5113 due to the fact that the spring 42 generates upward pretightening force, and the press button assembly 4 cannot axially move relative to the second handle 5 due to the constraint of the limiting groove 5113.
As shown in FIG. 11, when downward pressure is applied to the knob cover 41, the spring 42 is compressed, the knob cover 41 moves downward and drives the limiting structure 441 of the limiting tube 44 to move downward, at this time the limiting structure 441 is disengaged from the limiting groove 5113, when downward pressure and rearward pulling force are simultaneously applied to the knob cover 41, the knob assembly 4 drives the connection tube 33, the connection tube 33 drives the knob 32, the knob 32 drives the screw 31, the screw 31 drives the first handle 2, the first handle 2 drives the sheath tube 12 to move from distal end to proximal end, and because the mandrel 11 is locked and fixed by the locking knob 52, the sheath tube 12 moves rearward relative to the mandrel 11, thereby completing rapid release of the valve.
When the limiting structure 441 of the limiting tube 44 is located in the limiting groove 5113, the outer sheath tube 12, the front handle 2 and the screw 31 can only slowly move from the distal end to the proximal end through rotating the knob 32, the releasing position of the artificial valve can be accurately positioned in the process, after the releasing position is determined, the press button assembly 4 is pressed and pulled backwards, at the moment, the limiting structure 441 is separated from the limiting groove 5113, the press button assembly 4 drives the connecting tube 33, the connecting tube 33 drives the knob 32, the knob 32 drives the screw 31, the screw 31 drives the first handle 2, the first handle 2 drives the outer sheath tube 12 to rapidly move from the distal end to the proximal end, and rapid release is achieved.
Correspondingly, the embodiment also provides a push-button type artificial valve conveying method, which specifically comprises the following steps:
(1) Loading a prosthetic valve between the mandrel and the outer sheath;
(2) The mandrel and the outer sheath are sent to an implantation position for pre-positioning;
(3) Slowly releasing the artificial valve by rotating the knob, and simultaneously adjusting the release position of the artificial valve;
(4) After the release position is determined, the push button assembly is pressed and pulled proximally, so that the quick release of the artificial valve is completed, and the accurate positioning of the artificial valve is realized.
The foregoing is only illustrative of the preferred embodiments and principles of the present invention, and changes in specific embodiments will occur to those skilled in the art upon consideration of the teachings provided herein, and such changes are intended to be included within the scope of the invention as defined by the claims.