CN212996893U - Delivery system capable of buffering and releasing implantation instrument - Google Patents
Delivery system capable of buffering and releasing implantation instrument Download PDFInfo
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- CN212996893U CN212996893U CN202022259169.2U CN202022259169U CN212996893U CN 212996893 U CN212996893 U CN 212996893U CN 202022259169 U CN202022259169 U CN 202022259169U CN 212996893 U CN212996893 U CN 212996893U
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Abstract
The utility model relates to the field of medical equipment, especially, relate to a but buffer release implantation apparatus's conveying system, including implantation apparatus, inner tube, epitheca, near-end control release, brake valve lever and distal end control release, implantation apparatus one end is connected with near-end control release, distal end control release includes restriction sheath, pull head and locating part, restriction sheath with the inner tube distal end is connected, pull head and locating part are set up on the inner tube, the pull head sets up the distal side at the locating part, when implantation apparatus loads with conveying system, the other end of implantation apparatus is connected with the pull head and is restricted in the restriction sheath, operation brake valve lever makes the restriction sheath move to the distal end in-process, the pull head cooperates with the locating part and can buffer release the other end of implantation apparatus, realizes that the other end of implantation apparatus breaks away from the restriction sheath gradually; the utility model provides an implant apparatus in vivo release in-process in advance with break away from the restriction in the twinkling of an eye, lead to in vivo off tracking, run and fly the scheduling problem.
Description
Technical Field
The utility model belongs to the field of medical equipment, concretely relates to but conveying system of instrument is implanted in buffering release.
Background
Aortic stenosis is mainly caused by sequelae of rheumatic fever, congenital abnormalities of aortic valve structure or senile calcification of aortic valve. Patients are asymptomatic during the compensation period, and patients with severe aortic stenosis are often accompanied by symptoms of lassitude, dyspnea (exertional or paroxysmal), angina pectoris, vertigo or syncope, and even sudden death.
The aortic valve is opened when the ventricle contracts, the blood in the left ventricle enters the aorta and is emitted to the whole body, the aortic valve is closed when the ventricle relaxes, the blood in the aorta is prevented from flowing back to the left ventricle, and if the aortic valve is not closed completely, the aortic valve cannot be closed tightly in the diastole, so that the blood reversely flows into the left ventricle from the aorta.
In the treatment of aortic valve disease, surgical valve replacement is the traditional effective treatment. However, patients with such diseases are many elderly patients, suffer from multiple organ diseases, are difficult to be subjected to surgical operation, and become patients who are not expected to be clinically treated. In addition, the etiology of degenerative aortic valvular disease is still unclear, and the etiology cannot be treated, and no effective method for inhibiting the development of degenerative aortic valvular disease exists, so that the curative effect of the medicine is poor. The ideal treatment for aortic valve disorders would improve both the symptoms and longevity of the patient. Percutaneous aortic balloon angioplasty, performed in the early years, has been used to treat aortic stenosis, but either single-center data or multi-center registration data have been found to be ineffective in the long term. Surgical valve replacement remains a major treatment option in the country. In recent years, some scholars at home and abroad carry out basic and clinical researches on percutaneous aortic valve replacement and have achieved breakthrough progress. Provides an effective treatment method for high-risk senile degenerative aortic valve patients needing surgical valve replacement. In 2002, Cribier et al succeeded in Transcatheter Aortic Valve Replacement (TAVR), and more than 5 million TAVR surgeries have been performed worldwide, and studies worldwide have shown: this technique is safe and effective for patients who are unable to undergo surgical valve replacement or who are at high risk of surgical valve replacement. Although most of patients who are subjected to TAVR surgery have high risk, the survival rate of the patients after 30 days is higher than 90%, and the hemodynamic index of the patients after TAVR surgery is obviously improved.
However, the autologous aortic insufficiency is still classified as contraindication of TAVR. The main reason is that accurate positioning and precise release of the implanted device valve are the most critical technical points in TAVR surgery. The aortic valve has openings for the left and right coronary arteries, and the valve is positioned adjacent to the mitral valve, so if the positioning and releasing are not accurate, fatal complications such as coronary occlusion or massive mitral regurgitation can occur. The conventional TAVR instrument, whether SAPIEN or CoreValve, is primarily used in patients with severe aortic stenosis and is not suitable for patients with aortic regurgitation. In the prior art, certain consensus has been made on the design of instruments for aortic Valve regurgitation patients, for example, jena Valve and Acurate abroad and J-Valve in China all adopt a structure similar to a self-body Valve leaflet positioning piece for positioning three sinuses of an aortic Valve, which is beneficial to the accurate positioning and implantation of an implantation instrument. However, the above devices are still mostly inserted from the apex of the heart, and still have great trauma to the patient, which cannot be considered as percutaneous implantation in a strict sense. In order to solve the problem of considering the overlarge positioning piece and the sheath pipe of the autologous valve leaflet, domestic scholars and engineers make some conceptual attempts.
Patent CN201180023133.5 discloses a delivery system (30) for percutaneously deploying a stented prosthetic heart valve (160), the delivery system (30) comprising: an inner shaft assembly (34) including an intermediate portion providing a coupling structure (120), the coupling structure (120) configured to selectively mate with a prosthetic heart valve (160); a delivery sheath assembly slidably disposed over the inner shaft assembly (34), the delivery sheath assembly comprising a tubular capsule and a delivery shaft, wherein the capsule extends from a distal end of the delivery shaft and is configured to compressively contain a prosthetic heart valve (160) mated with the coupling structure (120); and a handle (38), the handle (38) coupled to the inner shaft assembly (34) and the delivery sheath assembly, the handle including a housing having a proximal end and a distal end, the handle (38) retaining a first actuator (142a,144) and a second actuator (142b,150), the first actuator (142a,144) selectively applying a force to the delivery sheath assembly, the second actuator (142b,150) selectively applying a force to the inner shaft assembly (34) to retract the prosthetic heart valve (160), the first and second actuators simultaneously operating relative to the handle to apply a force to the delivery sheath assembly and the inner shaft assembly to facilitate recapturing the prosthetic heart valve (160) into the capsule, the first actuator positioned between the proximal end and the distal end, and a user interface slidably retained by the housing, the user interface extending at least partially outside of the housing in a slotted opening and slidable in a longitudinal direction relative to the housing within the opening, wherein the first actuator is operable to apply a distal force to the capsule toward the distal end, the second actuator is positioned at the proximal end, wherein the second actuator is operable to apply a proximal force to the prosthetic heart valve in a spaced relationship from the distal end away from the proximal end. The technical scheme has the defects that: since the release of the stent is a process of 'stent length shortening and gradual circumferential expansion', in the process, since the stent is restored to the preset shape, because of a larger 'retraction force', if the far end of the delivery system is not provided with a limiting structure for the release of the stent, the stent is likely to be released in advance, the release of the stent is not controllable, and the risk of the operation is greatly increased.
Therefore, how to limit the stent to be released in advance, make the release process of the stent controllable, reduce uncertain factors in the operation and improve the success rate of the operation becomes the problem which needs to be solved urgently by medical staff at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects of the prior art and providing a valve conveying system which can limit the early release of a stent for patients with aortic stenosis and need interventional therapy. The utility model provides an implant the apparatus and resume and predetermine the problem that the form in-process released in advance.
The utility model aims at realizing through the following scheme: a delivery system of a damping release implantation instrument comprises an implantation instrument, an inner tube, an outer sheath, a proximal control release device and a control handle, the valve delivery system also comprises a distal end control release device, one end of the implantation instrument is connected with the proximal end control release device, the far-end control release device comprises a limiting sheath, a pull head and a limiting piece, the limiting sheath is connected with the far end of the inner tube, the slider and the stopper are provided on the inner tube, the slider is provided on a distal end side of the stopper, when the implantation instrument is loaded with the delivery system, the other end of the implantation instrument is connected with the pull head and is limited in the limiting sheath, in the process of operating the control handle to enable the limiting sheath to move towards the far end, the pull head and the limiting piece are matched to release the other end of the implantation instrument in a buffering mode and gradually separate from the limiting sheath.
The purpose of the utility model can be further realized by the following technical scheme:
in one embodiment, the pull head is axially movable along the inner tube.
In one embodiment, the stop can prevent further proximal axial movement of the pull head.
In one embodiment, the retaining member is fixedly connected to the proximal control release means or the retaining member is axially movable along the inner tube between the proximal control release means and the slider.
In one embodiment, the slider is fixedly connected to the limiting member or separated from the limiting member, and when the slider is separated from the limiting member, a step is provided between the slider and the limiting member.
In one embodiment, the stop member is a sleeve member.
In one embodiment, the retaining member is a piece when at least one end of the retaining member is fixedly connected to the proximal control release device or the pull head.
In one embodiment, when the limiting part is a sleeve part, the limiting part can protect the implantation instrument, the implantation instrument is easy to rub with the inner tube when rotating, and then certain damage is caused to the implantation instrument, and the inner tube and the implantation instrument are isolated by the limiting part with a smooth surface, so that the effective protection effect is achieved.
In one embodiment, the locating part is evenly provided with a plurality of cutting lines, and the design has the advantages that: the stop member is also adapted to a degree of flexion so that the delivery system is more easily adjusted and adapted when entering a tortuous vessel.
In one embodiment, the stopper is a tubular member.
In one embodiment, when the control handle is operated such that the restraining sheath moves distally and does not completely disengage from the other end of the implantation instrument, the other end of the implantation instrument is always restrained within the restraining sheath by the pull head.
In one embodiment, the other end of the implantation instrument is provided with a limiting hole, and the limiting hole is detachably connected with the pull head.
In one embodiment, the slider is provided with a stop protrusion.
In one embodiment, the spacing hole aperture is larger than the spacing bump diameter.
In one embodiment, the proximal control release device includes a connector and a control wire.
In a preferred embodiment, the connecting piece comprises a base fixedly connected to the other end of the transmission piece, and a plurality of connecting claws uniformly distributed on the base, wherein hole-shaped structures are arranged on the connecting claws.
In a preferred embodiment, the control wire is made of nitinol wire with a diameter of 0.2mm to 0.5 mm.
In one embodiment, the retaining element is fixed to the connecting element.
In one embodiment, the pull head moves proximally as the implantation instrument axially contracts, and the pull head does not move proximally after contacting the stop.
In one embodiment, the stopper is fixedly connected to the slider.
In one embodiment, the pull head drives the stop members to move proximally all together as the implantation instrument is axially contracted, and the stop members do not move proximally any longer after contacting the connecting member.
In one embodiment, the stoppers are individually axially movable.
In one embodiment, the pulling head moves towards the proximal end along with the axial contraction of the implantation instrument, and after the pulling head touches the limiting piece, the pulling head drives the limiting piece to move towards the proximal end together until the limiting piece touches the connecting piece, and the pulling head and the connecting piece do not move towards the proximal end any more.
In one embodiment, the valve delivery system further comprises an adjustment mechanism, one end of the adjustment mechanism is connected with the control handle, the other end of the adjustment mechanism is connected with the proximal control release device, when the implantation instrument needs a specific circumferential position, the control handle is operated to enable the adjustment mechanism to drive the proximal control release device to rotate, the proximal control release device drives the implantation instrument to rotate, and in the process, the distal control release device rotates along with the implantation instrument and keeps relatively static with the implantation instrument.
In one embodiment, the adjustment mechanism is a transmission rod, one end of the transmission rod is connected to the control handle, and the other end of the transmission rod is connected to the proximal end control release device.
In one embodiment, a rotating structure is disposed between the inner tube and the distal control release device, and the inner tube and the outer sheath remain stationary while the control handle is operated to cause the adjustment mechanism to rotate the implantation instrument and further rotate the distal control release device.
In one embodiment, the rotating structure includes a boss disposed on the inner tube and a groove disposed within the control release device, the boss being disposed within the groove.
In a preferred embodiment, the rotating structure may be a bearing, the distal end of the inner tube is sleeved in the bearing, and the outer ring of the bearing is fixed to the distal control release device, so that when the control handle is operated to make the adjusting mechanism drive the implantation instrument to rotate and further drive the distal control release device to rotate, the inner tube and the outer sheath are both kept stationary.
Compared with the prior art, the utility model has the advantages of:
1. different from other conveying systems, the utility model is provided with a remote control release device, the implantation instrument is connected with a limit bulge on the pull head through a limit hole, the pull head can move axially on the inner tube, which not only can be adapted to the implantation instruments with different axial lengths and specifications, but also can simultaneously, due to the limiting function of the limiting piece on the pull head, the limiting sheath can move towards the far end until the limiting sheath is separated from the implantation instrument, the implantation instrument can axially contract, the pull head can axially move in coordination with the implantation instrument until the pull head abuts against the limiting piece which abuts against the proximal end control release device, the puller is matched with the limiting piece and the proximal control releasing device to apply an axial acting force to the distal end of the implantation instrument, so that the axial acting force is offset with the axial contraction force of the implantation instrument, the contraction force of the implantation instrument can be gradually released, and the release of the implantation instrument is more controllable; in a contrary way of the prior art, the far end of the conveyor has no component to provide axial force for the implantation instrument, the implantation instrument radially expands and axially contracts in the process that the sheath moves to the far end, and the axial contraction of the implantation instrument is uncontrollable because the implantation instrument cannot be controlled by the axial force, so that the implantation instrument is easily popped out of the control release device suddenly, and the position of the implantation instrument is uncontrollable;
2. the utility model discloses a locating part can be the sleeve pipe spare, and the benefit of designing like this lies in: the limiting piece is arranged between the inner tube and the implantation instrument, so that the inner tube is prevented from rubbing with the inside of the implantation instrument when the implantation instrument rotates, and then the implantation instrument is prevented from being damaged;
3. the rotating mechanism is arranged between the inner tube and the limiting sheath, so that the inner tube and the limiting sheath always keep relative rotation, and when the adjusting mechanism drives the implantation instrument to rotate, the implantation instrument drives the limiting sheath to rotate due to the friction force between the implantation instrument and the inner wall of the limiting sheath; meanwhile, the inner tube is kept still relative to the implantation instrument, so that the implantation instrument has smaller resistance in the rotation adjustment process and is convenient to adjust; if the inner tube is fixedly connected with the limiting sheath, the implantation instrument can encounter larger resistance when being rotationally adjusted, on one hand, the implantation instrument can encounter larger resistance when being rotationally adjusted due to the fact that the inner tube rotates together, on the other hand, the inner tube not only pushes the limiting sheath to enable the far end of the implantation instrument to be released, but also rotates along with the implantation instrument, and therefore the structural design of a control handle of the conveying system is quite complex and is not beneficial to the operation of medical staff;
4. the utility model discloses a set up the adjustment mechanism, under the circumstances that keeps the epitheca motionless through operating the control handle, utilize the adjustment mechanism to carry out the adjustment of circumferential position to the implantation apparatus, realize accurate regulation and control, can effectively avoid the no juncture in the right side (conduction bundle position), prevent that the patient from appearing the circumstances such as conduction block, apoplexy in the operation process; meanwhile, one surface with sparse grids can be aligned to the coronary ostia, so that the coronary blockage is avoided; or the implantation instrument with the positioning member can be precisely introduced into the sinus.
Drawings
Fig. 1a to 1f are schematic views illustrating a process of moving an implantation instrument distally by a restraining sheath according to the present invention, wherein fig. 1c is a partially enlarged view of fig. 1b, fig. 1e is a partially enlarged view of fig. 1d, and fig. 1f is another embodiment.
Fig. 2a to 2c are schematic structural views illustrating the limiting sheath of the present invention moving to the limiting hole of the implantation instrument, wherein fig. 2b is a partially enlarged view of fig. 1a, and fig. 2c is a force analysis view of the slider.
Fig. 3a to 3c are schematic layout views of various embodiments of the slider, the limiting member and the connecting member according to the present invention.
Fig. 4a to 4d are schematic views illustrating the process of completely releasing the distal end and the proximal end of the implantation device of the present invention.
Fig. 5a to 5c are schematic diagrams of various embodiments of the rotating structure of the present invention.
Fig. 6a to 6e are schematic diagrams of various embodiments of the slider and the stopper of the present invention.
Fig. 7a to 7d are schematic structural views of another embodiment of the present invention.
Fig. 8 is a schematic structural diagram of another embodiment of the present invention.
The names of the parts indicated by the numbers in the drawings are as follows: 1-implantation instrument, 11-limiting hole, 12-positioning piece, 2-control handle, 21-rotating piece, 22-wire drawing knob, 23-locking knob, 24-distal control release button, 3-proximal control release device, 31-connecting piece, 32-control wire, 4-distal control release device, 41-limiting sheath, 42-pulling head, 43-limiting piece, 421-limiting protrusion, 431-stressed boss, 5-inner tube, 6-adjusting mechanism, 7-rotating structure, 71-boss, 72-groove and 73-bearing.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The near end of the utility model is the end close to the operator, and the far end is the end far away from the operator.
The first embodiment is as follows:
in one embodiment, as shown in fig. 1a and 1b, a valve delivery system capable of limiting the early release of a stent comprises an implantation instrument 1, a delivery catheter, a proximal control release device 3 and a control handle 2, the valve delivery system further comprises a distal control release device 4, one end of the implantation instrument 1 is connected with the proximal control release device 3, the distal control release device 4 comprises a limiting sheath 41, a pull head 42 and a limiting member 43, the limiting sheath 41 is connected with the distal end of the inner tube 5, the pull head 42 and the limiting member 43 are sleeved on the inner tube 5, the pull head 42 is arranged at the distal side of the limiting member 43, when the implantation instrument is loaded with the delivery system, the other end of the implantation instrument 1 is connected with the pull head 42 and limited in the limiting sheath 41, during the operation of the control handle 2 to move the limiting sheath 41 to the distal end, the pull head 42 and the limiting piece 43 are matched to limit the other end of the implantation instrument 1 from being separated from the limiting sheath 41 in advance; the stop element 43 is fixedly connected to the connecting element (as shown in fig. 1c and 3 a), the limiting sheath 41 moves towards the distal end, the implantation device 1 expands radially and contracts axially, the slider 42 moves axially towards the proximal end on the inner tube 5 along with the axial contraction of the implantation device 1, as shown in fig. 1d and 1e (the arrow in fig. 1e is the moving direction of the slider 42), when the slider 42 moves to touch the stop element 43, the proximal end of the slider 42 is supported by the stop element 43, and the stop protrusion 421 on the slider 42 makes the implantation device 1 balanced in axial force through the stop hole 11, as shown in fig. 2a to 2 c; when the limiting sheath 41 moves proximally to approach the limiting hole 11, the implantation instrument 1 expands radially and axially, and the limiting hole 11 gradually leaves the limiting protrusion 421, so that the distal end of the implantation instrument 1 is released, as shown in fig. 4a and 4 b.
In one embodiment, the slider 42 can move axially on the outer surface of the retaining member 43, as shown in fig. 1f (the arrow in the figure is the moving direction of the slider 42), a force receiving boss 431 is provided on the retaining member 43, the slider moves to the force receiving boss 431 along with the axial contraction of the implantation device 1, the force receiving boss 431 provides axial supporting force to the slider 42, and the slider 42 and the implantation device 1 are balanced in force and do not move axially.
In one embodiment, the control handle 2 has a rotating member 21, a wire-drawing knob 22, a locking knob 23 and a distal control release button 24, as shown in fig. 1b, the rotating member 21 can operate the adjusting mechanism 6 to rotate (the rotational operation can be performed by a knob and screw connection), the wire-drawing knob 22 can operate the control wire 32 to separate the connecting member 31 from the proximal end of the implantation instrument 1, the distal control release button 24 can operate the distal control release device 4, and the locking knob 23 can control the inner tube 5 and the adjusting mechanism 6 to rotate relatively or synchronously, as shown in fig. 1 c.
In one embodiment, one end of the implantation instrument 1 is controlled to release by the proximal control release device 3, the proximal control release device 3 comprises the connecting member 31 and the control wire 32, the proximal end of the implantation instrument 1 is limited on the connecting member 31 by the control wire 32, the connecting member 31 is connected with the adjusting mechanism 6, the control handle 2 is operated to rotate the adjusting mechanism 6, the adjusting mechanism 6 drives the connecting member 31 to rotate, and the connecting member 31 drives the implantation instrument 1 to rotate.
In one embodiment, the adjusting mechanism 6 is a limiting member, and the adjusting mechanism 6 is made of medical grade stainless steel material.
In one embodiment, as shown in fig. 5a and 5b, a rotation structure 7 is disposed between the inner tube 5 and the restraining sheath 41, so that the inner tube 5 and the distal control releasing device 4 perform relative rotation, the rotation structure 7 includes a boss 71 disposed on the inner tube 5 and a groove 72 disposed in the restraining sheath 41, the boss 71 is disposed in the groove 72, when the adjustment mechanism 6 rotates the implantation instrument 1, the implantation instrument 1 rotates the restraining sheath 41 due to friction between the implantation instrument 1 and the restraining sheath 41; the inner tube 5 remains stationary, so that the implantation instrument 1 encounters less resistance during rotational adjustment, facilitating adjustment.
In another embodiment, as shown in fig. 5c, the rotating structure 7 is a bearing 73, the end of the distal end of the inner tube 5 is sleeved in the bearing 73, and the outer ring of the bearing 73 is fixed to the limiting sheath 41, so that the inner tube 5 and the distal end controlled release device 4 always maintain relative rotation.
The utility model discloses a theory of operation does:
as shown in fig. 1b, the valve delivery system has a control handle 2, and the control handle 2 is provided with a rotating member 21, a wire-drawing knob 22 and a distal control release button 24 for respectively controlling the adjusting mechanism 6, the control wire 32 and the distal control release device 4; the control handle 2 is also provided with a locking knob 23, and the locking knob 23 can control the inner tube 5 and the adjusting mechanism 6 to realize relative rotation or synchronous rotation; the far end of the control handle 2 is connected with an inner tube 5 and a limiting sheath 41 which is connected with the inner tube 5 in a matching way, a pull head 42, an adjusting mechanism 6 and a near end control releasing device 3 are further connected between the inner tube 5 and the limiting sheath 41 in a matching way, the near end control releasing device 3 comprises a connecting piece 31 and a control wire 32, the near end of the implantation apparatus 1 is detachably connected with the connecting piece 31 through the control wire 32, the far end of the implantation apparatus 1 is connected with the far end control releasing device 4 in a matching way, and a limiting bulge 421 on the pull head 42 penetrates through a limiting hole 11 of the implantation apparatus 1; the adjusting valve delivery system is operated to release the positioning member 12 on the implantation device 1 to the target position, the locking knob 23 is operated to make the inner tube 5 and the adjusting mechanism 6 rotate relatively, the distal control release button 24 is operated, more specifically, the limiting sheath 41 is operated to move axially towards the distal end, the implantation device 1 limited at the limiting sheath 41 gradually recovers to the preset shape, the implantation device 1 radially expands and axially contracts, the implantation device 1 drives the slider 42 to move axially towards the proximal end, the slider 42 does not move towards the proximal end after the slider 42 touches the connecting limiting member 43, as shown in fig. 2b, at this time, the slider 42 limits the implantation device 1 from releasing axially, the implantation device 1 cannot release prematurely due to axial support, the slider 42 is forced as shown in fig. 2c, the proximal end of the slider 42 obtains the supporting force F1 of the limiting member 31, the distal end of the slider 42 obtains the axial force F2 of the implantation device 1 at the position of the limit protrusion 421, the limit sheath 41 is operated to continue moving towards the distal end until reaching the limit hole 11, the limit hole 11 of the implantation device 1 is gradually separated from the limit protrusion 421 on the slider 42, the limit sheath 41 is operated to leave the limit hole 11, and the distal end of the implantation device 1 is completely released, as shown in FIGS. 4a and 4 b; the wire drawing knob 22 is operated so that the control wire 32 is disengaged from the implantation instrument 1 and the connecting element 31, the proximal end of the implantation instrument 1 is no longer constrained to the connecting element 31, and the implantation instrument 1 is completely released in the heart, as shown in fig. 4c and 4 d.
The second embodiment is as follows:
unlike the above-described embodiment, the stopper 43 is separated from the connecting member 31 (as shown in fig. 7a and 7 b), the layout relationship of the slider 42, the stopper 43 and the connecting member 31 is shown in FIG. 3b, the restraining sheath 41 is moved distally, the implantation device 1 is radially expanded and axially contracted, the pulling head 42 is axially moved proximally on the inner tube 5 with the axial contraction of the implantation device 1, the slider 42 is fixedly connected to the stopper 43 (as shown in fig. 6 c), the slider 42 and the stopper 43 move axially together, the position-limiting member 43 moves to touch the connecting member 31, the proximal end of the position-limiting member 43 is supported by the connecting member 31, the limiting protrusion 421 on the slider 42 passes through the limiting hole 11 to make the axial force balance of the implantation device 1, as shown in fig. 7c and 7d (in the force analysis of fig. 7d, the slider 42 and the limiting member 43 are regarded as a whole); when the limiting sheath 41 moves to a position close to the limiting hole 11 at the proximal end, the implantation instrument 1 expands in the radial direction and the axial direction, and the limiting hole 11 gradually leaves the limiting bulge 421, so that the distal end of the implantation instrument 1 is released.
In another embodiment, both the pull head and the stop member are axially movable on the inner tube 5 alone (as shown in fig. 8), the layout relationship of the slider 42, the stopper 43 and the connecting member 31 is shown in FIG. 3c, the restraining sheath 41 is moved distally, the implantation device 1 is radially expanded and axially contracted, the pulling head 42 is axially moved proximally on the inner tube 5 with the axial contraction of the implantation device 1, the pulling head 42 moves to touch the limiting piece 43, the pulling head 42 pushes the limiting piece 43 to move axially, the position-limiting member 43 moves to touch the connecting member 31, the proximal end of the position-limiting member 43 is supported by the connecting member 31, the slider 42 is supported by the limiting piece 43, and the limiting protrusion 421 on the slider 42 makes the implant device 1 axially stressed and balanced through the limiting hole 11.
The utility model discloses a theory of operation does:
as shown in fig. 7a, the valve delivery system has a control handle 2, and the control handle 2 is provided with a rotating member 21, a wire-drawing knob 22 and a distal control release button 24 for respectively controlling the adjusting mechanism 6, the control wire 32 and the distal control release device 4; the control handle 2 is also provided with a locking knob 23, and the locking knob 23 can control the inner tube 5 and the adjusting mechanism 6 to realize relative rotation or synchronous rotation; the far end of the control handle 2 is connected with an inner tube 5 and a limiting sheath 41 which is connected with the inner tube 5 in a matching way, a pull head 42, an adjusting mechanism 6 and a near end control releasing device 3 are further connected between the inner tube 5 and the limiting sheath 41 in a matching way, the near end control releasing device 3 comprises a connecting piece 31 and a control wire 32, the near end of the implantation apparatus 1 is detachably connected with the connecting piece 31 through the control wire 32, the far end of the implantation apparatus 1 is connected with the far end control releasing device 4 in a matching way, and a limiting bulge 421 on the pull head 42 penetrates through a limiting hole 11 of the implantation apparatus 1; the adjusting valve delivery system is operated to release the positioning member 12 on the implantation device 1 to the target position, the locking knob 23 is operated to make the inner tube 5 and the adjusting mechanism 6 rotate relatively, the distal control release button 24 is operated, more specifically, the limiting sheath 41 is operated to move axially towards the distal end, the implantation device 1 limited at the limiting sheath 41 gradually recovers to the preset shape, the implantation device 1 radially expands and axially contracts, the implantation device 1 drives the slider 42 to move axially towards the proximal end, the limiting member 43 moves together with the slider 42 as fixed, as shown in fig. 7b, at this time, the slider 42 limits the implantation device 1 from releasing axially, the implantation device 1 cannot release prematurely due to axial support, the slider 42 and the limiting member 43 are stressed as shown in fig. 7d (the slider 42 and the limiting member 43 are regarded as a whole), the proximal end of the limiting piece 43 obtains a supporting force F1 of the connecting piece 31, the distal end of the pull head 42 obtains an axial force F2 of the implanting device 1 at the limiting protrusion 421, the limiting sheath 41 is operated to continue to move towards the distal end until the limiting hole 11 is formed, the limiting hole 11 of the implanting device 1 is gradually separated from the limiting protrusion 421 on the pull head 42, the limiting sheath 41 is operated to leave the limiting hole 11, and the distal end of the implanting device 1 is completely released; the wire drawing knob 22 is operated to separate the control wire 32 from the implantation instrument 1 and the connecting piece 31, the proximal end of the implantation instrument 1 is no longer constrained on the connecting piece 31, and the implantation instrument 1 is completely released in the heart.
The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.
Claims (10)
1. A delivery system for a cushioned release implant device comprising an implant device, an inner tubing, an outer sheath, a proximal control release, and a control handle, wherein: the device is characterized by further comprising a far-end control releasing device, one end of the implanting instrument is connected with the near-end control releasing device, the far-end control releasing device comprises a limiting sheath, a pull head and a limiting piece, the limiting sheath is connected with the far end of the inner tube, the pull head and the limiting piece are arranged on the inner tube, the pull head is arranged on the far end side of the limiting piece, when the implanting instrument is loaded with the conveying system, the other end of the implanting instrument is connected with the pull head and limited in the limiting sheath, and in the process that the control handle is operated to enable the limiting sheath to move towards the far end, the pull head and the limiting piece are matched to buffer and release the other end of the implanting instrument, so that the other end of the implanting instrument is gradually separated from the limiting sheath.
2. The delivery system of a cushioned release implant device of claim 1, wherein: the pull head is axially movable along the inner tube.
3. The delivery system of a cushioned release implant device of claim 1, wherein: the stop can prevent the pull head from moving axially further proximally.
4. The delivery system of a cushioned release implant device of claim 1, wherein: the limiting member is fixedly connected with the proximal end control release device or the limiting member can axially move between the proximal end control release device and the pull head along the inner tube.
5. The delivery system of a cushioned release implant device of claim 1, wherein: the pull head is fixedly connected with the limiting part or separated from the limiting part, and when the pull head is separated from the limiting part, a step is arranged between the pull head and the limiting part.
6. The delivery system of a cushioned release implant device of claim 1, wherein: the limiting part is a sleeve part.
7. The delivery system of a cushioned release implant device of claim 1, wherein: when at least one end of the limiting piece is fixedly connected with the near-end control releasing device or the pull head, the limiting piece is a piece.
8. The delivery system of a cushioned release implant device of claim 1, wherein: a plurality of cutting lines are arranged on the limiting part.
9. The delivery system of a cushioned release implant device of claim 1, wherein: the conveying system further comprises an adjusting mechanism, one end of the adjusting mechanism is connected with the control handle, the other end of the adjusting mechanism is connected with the near-end control releasing device, when the circumferential position of the implantation instrument needs to be adjusted, the control handle is operated to enable the adjusting mechanism to drive the near-end control releasing device to rotate, the near-end control releasing device drives the implantation instrument to rotate, and in the process, the far-end control releasing device rotates along with the implantation instrument and keeps relatively static with the implantation instrument.
10. The delivery system of a cushioned release implant instrument of claim 9, wherein: a rotating structure is arranged between the inner tube and the far-end control release device, and when the control handle is operated, the adjusting mechanism drives the implantation instrument to rotate and further drives the far-end control release device to rotate, the inner tube and the outer sheath are kept still.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022259169.2U CN212996893U (en) | 2020-10-12 | 2020-10-12 | Delivery system capable of buffering and releasing implantation instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022259169.2U CN212996893U (en) | 2020-10-12 | 2020-10-12 | Delivery system capable of buffering and releasing implantation instrument |
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| CN212996893U true CN212996893U (en) | 2021-04-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022078147A1 (en) * | 2020-10-12 | 2022-04-21 | 宁波健世生物科技有限公司 | Delivery system enabling release cushioning of implant device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022078147A1 (en) * | 2020-10-12 | 2022-04-21 | 宁波健世生物科技有限公司 | Delivery system enabling release cushioning of implant device |
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