CN211583672U - Handle for delivering implant and delivery system - Google Patents

Abstract

The utility model discloses a handle and conveying system for carrying implant, conveying system includes handle and tubing assembly, the tubing assembly includes inner tube, outer tube and central siphon fixing base, the outer tube housing is located outside the inner tube, the motor shaft with the outer tube passes through the central siphon fixing base is connected. The handle comprises a shell, a driving unit and a motor, wherein the driving unit and the motor are arranged in the shell and are connected with each other, the motor is provided with a motor shaft, and the driving unit controls the motor shaft to do linear reciprocating motion along the axial direction. The utility model realizes the loading, recovery and release of the implant through the matching use of the driving unit and the linear motor, the structure reduces the use of the traditional parts, so that the internal structure of the handle is simpler and more reliable, and the manufacturing difficulty is reduced while the production cost is reduced; meanwhile, the whole transmission efficiency is higher, the error is smaller, and the precision of the operation is improved.

Description

Handle for delivering implant and delivery system

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a handle and conveying system for carrying implant.

Background

The survey shows that the probability of the middle-aged and the elderly suffering from coronary heart disease, cardiovascular and cerebrovascular diseases, valvular heart disease, tumor and other diseases is increased year by year. These diseases directly affect the quality of life and even the life safety of the elderly. Traditional surgical treatment is still the first choice for patients with serious diseases, but for patients with advanced age, complicated multiple organ diseases, chest-open operation history and poor body recovery function, the traditional surgical operation has high risk and high death rate, and some patients even have no operation chance. In the last decade, the international intervention has made a remarkable progress through continuous exploration, and becomes the branch of the most promising field of intervention.

Interventional therapy is a brand new treatment technology which is developed in recent years internationally, and the principle of the interventional therapy is that a modern high-tech means is used for carrying out tiny wound treatment, and under the guidance of medical imaging equipment, a special precise instrument is introduced into a human body to carry out diagnosis and local treatment on internal lesions. The technique has the characteristics of no operation, small wound, quick recovery, good effect and the like, and avoids the harm to patients caused by traditional surgical operations.

Delivery systems for interventional procedures are generally divided into two parts: a catheter assembly portion and a handle portion. The handle is used as a power source of the whole interventional therapy, and the sufficient precision and stability need to be ensured. At present, a conventional pure manual handle adopts a transmission structure similar to a thread pair; the electric handle adopts a stepping motor or a linear motor and combines components such as a coupler, a ball screw and the like to realize transmission. Therefore, the size chain of the product is complex to calculate due to the numerous components in the electric handle, and the produced finished product is often in poor conditions such as jitter and abnormal sound due to the position error of the components.

Therefore, it is necessary to provide a handle and a conveying system thereof with high precision, high stability and simple structure.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a handle and conveying system for carrying implant is provided, can improve operation precision, and inner structure is brief, reliable simultaneously.

The utility model discloses a solve above-mentioned technical problem and the technical scheme who adopts provides a handle for carrying implant, including the casing, set up in just interconnect's drive unit and motor in the casing, the motor has the motor shaft, drive unit control the motor shaft is straight reciprocating motion in the axial.

Preferably, the casing includes first casing and the second casing of dismantling the connection, be provided with first motor box in the first casing, be provided with the second motor box in the second casing, the both sides of motor imbed respectively first motor box with the second motor box.

Preferably, the motor is a linear motor, the driving unit is provided with a control key, the driving unit is arranged close to the inner wall of the shell, and the control key extends out of and is exposed out of the shell.

The utility model discloses a solve above-mentioned technical problem and another technical scheme that adopts provides a conveying system for carrying implant, including above-mentioned handle and tubing assembly, the tubing assembly includes inner tube, outer tube and central siphon fixing base, the outer pipe box is located outside the inner tube, the motor shaft with the outer tube passes through the central siphon fixing base is connected.

Preferably, a connecting piece is arranged on the side surface, facing the motor shaft, of the shaft tube fixing seat, the far end of the motor shaft is fixedly connected with the connecting piece of the shaft tube fixing seat, the near end of the outer tube is fixedly connected with the far end of the shaft tube fixing seat, the near end of the inner tube is fixedly connected with the near end of the shell, and the inner tube penetrates through the shaft tube fixing seat and is arranged in the outer tube.

Preferably, the motor shaft is provided with a cavity through which the inner tube passes, the motor shaft and the shaft tube fixing seat are coaxially arranged, the distal end of the motor shaft is fixedly connected with the proximal end of the shaft tube fixing seat, the proximal end of the outer tube is fixedly connected with the distal end of the shaft tube fixing seat, the proximal end of the inner tube is fixed at the proximal end of the housing, and the inner tube passes through the motor shaft and the shaft tube fixing seat and is placed in the outer tube.

Preferably, the far end of motor shaft is provided with external screw thread and boss terminal surface, the near-end of central siphon fixing base is provided with the internal thread that matches with the external screw thread.

Preferably, an outer tube emptying tube is arranged on the shaft tube fixing seat, and extends out of and is exposed out of the shell.

Preferably, the catheter assembly comprises a drain tap, a proximal end of the drain tap being disposed outside the housing, a distal end of the drain tap being connected to the proximal end of the inner tube.

Preferably, the catheter subassembly includes stable subassembly, stable subassembly includes stabilizator pipe and stable fixing base, stable fixing base is fixed in the distal end of casing, the near-end of stabilizator pipe with the distal end of stable fixing base is connected, the outer tube runs through stable fixing base with stable pipe, still be provided with stable evacuation pipe on the stable fixing base, stable evacuation pipe stretch out and expose in the casing.

The utility model discloses contrast prior art has following beneficial effect: the handle and the conveying system for conveying the implant provided by the utility model, through the matching use of the driving unit and the linear motor, replace the transmission modes of screw rod movement, thread pair movement and the like which need a plurality of parts, so that the internal structure of the handle is simpler and more reliable, and the manufacturing difficulty is reduced while the production cost is reduced; particularly, the linear motor is adopted as driving power, the linear motor in the handle can serve as a standard part as a whole, the whole transmission efficiency is higher, the error is smaller, and the precision of the operation is improved.

Drawings

Fig. 1 is a schematic view of an overall structure of a conveying system according to an embodiment of the present invention;

fig. 2 is a schematic view of an internal structure of a conveying system according to an embodiment of the present invention;

fig. 3 is a schematic view illustrating a connection between the shaft tube fixing base and the motor shaft according to an embodiment of the present invention;

fig. 4 is a schematic view of a catheter assembly according to an embodiment of the present invention;

fig. 5 is a partial schematic view of a catheter assembly according to an embodiment of the present invention;

fig. 6 is a schematic view of the overall structure of a conveying system according to another embodiment of the present invention;

fig. 7 is a schematic view of the internal structure of a conveying system according to another embodiment of the present invention;

fig. 8 is a schematic view illustrating the connection between the axle tube fixing base and the motor shaft according to another embodiment of the present invention.

In the figure:

10 handle 20 catheter assembly

11 first housing 12 second housing 13 motor shaft 14 motor

15 recovery key 16 release key 17 drive unit 21 emptying tap

22 inner tube 23 axle tube fixing seat 24 outer tube emptying tube 25 outer tube

26 stabilizing pipe fixing seat 27 stabilizing pipe 28 stabilizing emptying pipe 29 inner pipe assembly

292 fixed head 293 conical head 30 valve 231 attachment

131 first motor box 132 external thread 133 boss end surface 211 fixing piece

Detailed Description

The invention is further described with reference to the following figures and examples.

It should be noted that the terms "inner", "outer", "upper", "lower", and the like as used herein are for illustrative purposes only and do not mean a unique embodiment. The utility model uses the far end, the near end and the axial direction, wherein the far end is the side far away from the operator of the conveying system; "proximal" is the side proximal to the operator of the delivery system; "axial" refers to a direction along the axis of the motor shaft. "sealed connection" means a seamless connection of the outer surfaces of two components.

Because of the difference of the implant, the conveying system provided by the utility model can be applied to a plurality of interventional therapy environments, and the utility model takes the interventional therapy of heart valvular diseases as an example for explanation. The heart valve causes that the human old has the condition that the valve in the heart is narrow or incompletely closed, so that the sufferer has symptoms of chest distress, chest pain, asthma, general edema, weakness and the like. In order to solve the function loss of the diseased valve, the original valve is replaced by the artificial stent valve by means of the function of the conveying system in the interventional therapy of the heart valve disease, so that the effect of radical treatment is achieved.

Example 1

Referring to fig. 1 to 4, the delivery system provided in this embodiment includes a handle 10 and a catheter assembly 20, the handle 10 includes a housing, a driving unit 17 and a motor 14, the motor 14 has a motor shaft 13, the driving unit 17 is electrically connected to the motor 14, and the driving unit 17 is configured to control the motor 14 to make the motor shaft 13 perform a linear reciprocating motion along an axial direction. The casing is a cuboid, and in some embodiments, the casing is an ellipse, a gourd-shaped, or the like. The housing comprises a first housing 11 and a second housing 12 which are detachably connected, and a cavity for accommodating the driving unit 17, the motor 14 and a part of the duct assembly 20 is formed in the first housing 11 and the second housing 12. Further, a first motor box 131 is arranged on the first housing 11, a second motor box (not shown) is arranged at a position of the second housing 12 corresponding to the first motor box 131, two sides of the motor 14 are respectively embedded into the first motor box 131 and the second motor box in a matching manner, so as to be fixed in the housing, and a gap through which the inner tube 22 can pass is formed between the lower end of the motor 14 and the inner wall of the housing. Preferably, the driving unit 17 is disposed against the inner wall of the upper end of the housing and fixed in the housing by a snap fit with the first housing 11 and the second housing 12, and the driving unit 17 is a circuit control core of the entire handle 10. The drive unit 17 may also be provided at other locations on the handle 10 as long as its control function is not affected. The driving unit 17 is provided with a control key, the control key extends out of the housing and is exposed out of the housing, in this embodiment, the control key at least comprises a release key 16 and a recovery key 15, the recovery key 15 and the release key 16 are located right above the driving unit 17 and are in clearance fit with the first housing 11 and the second housing 12, and the clearance fit is convenient for the recovery key 15 and the release key 16 to move up and down. The motor 14 is a linear motor having a motor shaft 13, and the motor shaft 13 is driven by a driving unit 17 to reciprocate linearly in an axial direction. Further, the driving unit 17 controls the motor shaft 13 to move toward the distal or proximal end of the handle 10 according to the control signals of the retrieve key 15 and the release key 16. Specifically, the driving unit 17 exhibits two operation modes, when the recovery key 15 is clicked, the motor shaft 13 moves toward the distal direction of the handle 10; when the release button 16 is clicked, the motor shaft 13 moves in the proximal direction of the handle 10.

The catheter assembly 20 in this embodiment includes an evacuation cock 21, a shaft tube holder 23, an outer tube 25, and an inner tube assembly 29. The inner tube assembly 29 includes an inner tube 22. Further, the catheter assembly 20 further comprises a stabilizer tube holder 26, a stabilizer tube 27 and a stabilizer drain tube 28. The evacuation cock 21 is located below the proximal end of the first housing 11, the evacuation cock 21 extends out and is exposed out of the first housing 11, and the proximal end of the inner tube 22 is hermetically connected to the distal end of the evacuation cock 21 and is fixedly connected to the proximal end of the first housing 11 through a fixing member 211. The inner tube 22 adopts the structural design of a rigid hollow tube, and combines the function of sealing and externally connecting the emptying cock 21, so that the air in the inner tube 22 can be discharged in the operation process; the inner tube 22 passes through the gap between the motor 14 and the inner wall of the housing, the shaft tube holder 23, and the outer tube 25 and the stabilizer tube 27 in sequence from the proximal end to the distal end, suspending the catheter assembly 20 of the entire delivery system within the handle housing. Preferably, the evacuation tap 21 and the inner tube 22 are sealingly connected by means including, but not limited to, adhesive or threaded connection.

Referring to fig. 2 and 3, the shaft tube fixing seat 23 and the outer tube 25 are slidably sleeved outside the inner tube 22 in the axial direction, the motor shaft 13 and the outer tube 25 are fixedly connected by the shaft tube fixing seat 23, specifically, a connecting member 231 is disposed on a side surface of the shaft tube fixing seat 23 facing the motor shaft 13, a distal end of the motor shaft 13 is fixedly connected with the connecting member 231 on the side surface of the shaft tube fixing seat 23, and a proximal end of the outer tube 25 is fixedly connected with a distal end of the shaft tube fixing seat 23, preferably, the connecting member 231 is vertically connected with the motor shaft. The outer tube 25 is hermetically connected with the shaft tube fixing seat 23 in a seamless connection mode, the shaft tube fixing seat 23 is further hermetically connected with an outer tube emptying tube 24 communicated with the outer tube 25, and air between the inner tube 22 and the outer tube 25 can be exhausted by injecting liquid into the outer tube emptying tube 24. Preferably, the outer tube emptying tube 24 is disposed at the middle position of the shaft tube fixing seat 23 in the axial direction, extends out of the housing, and the outer tube emptying tube 24 is a flexible tube with a certain length, and when the outer tube emptying tube 24 reciprocates along with the shaft tube fixing seat 23, the outer tube emptying tube 24 in the housing can be released or stored. The fixed connection mode between the motor shaft 13 and the shaft tube fixing seat 23 includes but is not limited to one or more of key pin connection, welding, threaded connection, bonding, elastic snap connection, preferably the threaded connection mode that the connection is firm, reliable also convenient to dismantle, specifically, the distal end of the motor shaft 13 and the connecting piece 231 are provided with matched internal thread and external thread, so that the shaft tube fixing seat 23 can do linear reciprocating motion in the handle housing along with the motor shaft 13. When the motor shaft 13 makes a linear reciprocating motion, the motor shaft 13 drives the shaft tube fixing seat 23 fixedly connected with the motor shaft 13 to make a linear reciprocating motion, and further drives the outer tube 25 fixedly connected with the tube fixing seat 23 to follow the linear reciprocating motion, and because the inner tube assembly 29 is kept still, the operations of releasing, recovering, loading and the like of the implant are realized through the relative motion generated in the axial direction.

With continued reference to fig. 2, in a preferred embodiment, the outer tube 25 is further sleeved with a stabilizing assembly, the stabilizing assembly comprises a stabilizing tube fixing seat 26 and a stabilizing tube 27, the stabilizing tube fixing seat 26 is fixed at the distal end of the handle 10, preferably, the distal end of the stabilizing tube fixing seat 26 is hermetically connected with the stabilizing tube 27, the distal end of the outer tube 25 penetrates through the stabilizing tube fixing seat 26 and the stabilizing tube 27, the stabilizing tube 27 is sleeved outside the outer tube 25, and the distal end of the stabilizing tube 27 is stopped at a distance from the distal end of the inner tube assembly 29. Further, the stabilizing tube fixing seat 26 is also hermetically connected with a stable emptying tube 28 communicated with the stabilizing tube 27, and liquid is injected into the stable emptying tube 28 during the operation process to exhaust air between the outer tube 25 and the stabilizing tube 27. The stabilizing tube 27 supports the outer tube 25 through the stabilizing tube fixing seat 26, provides an acting point for a long catheter delivery system, provides an acting point for the movement of the outer tube 25 in a complex blood vessel of a human body in an operation process, and prevents the friction between the outer tube 25 and the blood vessel. In other embodiments, the structure of the handle is further simplified by eliminating the stabilizer tube 27, the stabilizer evacuation tube 28, and the stabilizer tube holder 26 when the material properties of the outer tube 25 are sufficiently strong.

Referring to fig. 5, the inner tube assembly 29 comprises an inner tube 22, a fixing head 292 and a tapered head 293 connected in series, wherein the fixing head 292 has six degrees of freedom limited for fixedly supporting the implant valve 30. When the input system provided by this embodiment controls the motor shaft 13 to do the linear reciprocating motion through the driving unit 17, the shaft tube fixing seat 23 is driven to move, and the shaft tube fixing seat 23 drives the outer tube 25 to do the linear reciprocating motion. Because the inner tube assembly 29 remains stationary, the resulting relative motion allows for the release, retrieval, and loading of the implant valve 30. Taking the valve releasing operation as an example, the specific implementation steps are as follows:

step S1: before the valve insertion procedure is initiated, the outer tube 25 encloses the entire valve 30 between the tapered head 293 and the fixation head 292 of the inner tube assembly 29.

Step S2: when the catheter delivery system reaches the valve release position, the power switch of the drive unit 17 is turned on.

Step S3: depending on the surgical situation, by clicking or continuously touching the release button 16, the linear motor 14 will drive the outer tube 25 to move towards the proximal end of the handle at different speeds, and the valve 30 will be released until it is ready to replace the native valve.

Step S4: when the valve 30 is not completely released, the recovery key 15 can be touched, the linear motor 14 drives the outer tube 25 to move towards the distal direction of the handle, the valve 30 which is not completely released is compressed into the outer tube 25 again, and the valve 30 is released again after the release position is determined again.

Example 2

Referring to fig. 6 and 7, the present embodiment is different from embodiment 1 in that the motor shaft 13 is a hollow tube and has a cavity for the inner tube 22 to pass through, the motor shaft 13 and the shaft tube fixing seat 23 are coaxially disposed, a distal end of the motor shaft 13 is directly and fixedly connected to a proximal end of the shaft tube fixing seat 23, a proximal end of the outer tube 25 is fixedly connected to a distal end of the shaft tube fixing seat 23, a proximal end of the inner tube 22 is fixed to a proximal end of the housing, and the inner tube 22 sequentially passes through the motor shaft 23 and the shaft tube fixing seat 23 from the proximal end to the distal end and is. Preferably, the motor shaft 13 is in threaded connection with the shaft tube fixing seat 23, the distal end of the motor shaft 13 is provided with an external thread 132 and a tapered boss end surface 133, and the proximal end of the shaft tube fixing seat 23 is provided with an internal thread matching with the external thread 132. The threaded connection is more firm and reliable, and is the preferable mode of fixed connection between the motor shaft 13 and the axle tube fixing seat 23, and in other embodiments, other common fixed connection modes can be used, such as key pin connection, welding, threaded connection, bonding, elastic buckle connection, and the like. The boss end surface 133 facilitates the guiding and matching operation between the shaft tube fixing seat 23 and the motor shaft 13; the end surface 133 of the boss can play a role in sealing and fixing in combination with the pretightening force generated between the shaft tube fixing seat 23 and the motor shaft 13. Of course, the outer tube 25 and the shaft tube fixing seat 23 may be fixedly connected by other means such as adhesion, containing a sealing ring, etc. The outer tube emptying tube 24 may be installed at the proximal end of the motor shaft 13 or the shaft tube fixing seat 23, preferably, at the shaft tube fixing seat 23, because the installation at the motor shaft 13 may generate a more severe sealing requirement for the motor shaft 13, and a sealing fixing connection member may be additionally added. The inner tube 22 penetrates the motor shaft 13 in the axial direction of the motor 14, and the distal end of the inner tube 22 penetrates the stabilizer holder 26 and is disposed between the outer tube 25 and the stabilizer 27, as in embodiment 1. The outer tube 25, which is connected with the shaft tube fixing seat 23 in a sealing and fixed mode, can move linearly and reciprocally on the inner tube 22 along with the motor shaft 13.

Simultaneously because the collineation of transmission axis and motion axis for the motion stability when linear motor shaft 13 drive central siphon fixing base 23 drives outer tube 25 and carries out straight reciprocating motion improves greatly, has further improved transmission efficiency and has reduced transmission error, compares embodiment 1 simultaneously, has lacked connecting piece 131 on the central siphon fixing base 23, and the inner tube 22 is worn to establish in motor shaft 13, also makes handle overall structure compacter, and space utilization is higher.

To sum up, the utility model provides a conveying system has following advantage at least: (1) the internal structure of the handle is simplified, and the manufacturing difficulty is reduced. The handle among the traditional conveying system includes a plurality of spare parts such as shaft coupling, ball screw, bearing, and the utility model discloses a handle is integrated for linear electric motor with above-mentioned spare part, has reduced the use of many spare parts, makes overall structure simpler, reliable. (2) The utility model discloses an in the handle, linear electric motor can act as a standard component as a whole, and holistic transmission efficiency is higher, the error is littleer, has improved the precision of operation. (3) For the side linear motor handle, the inner tube runs through the linear motor handle and is consistent with the linear motor shaft because of whole atress direction, can not bring transmission error because of the biasing load at whole transmission in-process, causes the damage to the linear motor, and whole handle transmission efficiency is higher, transmission error is littleer.

Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. The handle for conveying the implant is characterized by comprising a shell, a driving unit and a motor, wherein the driving unit and the motor are arranged in the shell and are mutually connected, the motor is provided with a motor shaft, and the driving unit controls the motor shaft to do linear reciprocating motion along the axial direction.

2. The handle of claim 1, wherein the housing comprises a first housing and a second housing that are detachably connected, a first motor box is disposed in the first housing, a second motor box is disposed in the second housing, and two sides of the motor are respectively embedded in the first motor box and the second motor box.

3. The handle of claim 1, wherein the motor is a linear motor, the drive unit has a control key disposed thereon, the drive unit is disposed against an inner wall of the housing, and the control key extends out of and is exposed from the housing.

4. A conveying system for conveying an implant is characterized by comprising a handle and a catheter assembly, wherein the handle is the handle in any one of claims 1 to 3, the catheter assembly comprises an inner tube, an outer tube and a shaft tube fixing seat, the outer tube is sleeved outside the inner tube, and a motor shaft is connected with the outer tube through the shaft tube fixing seat.

5. The conveying system as claimed in claim 4, wherein a connecting member is disposed on a side of the shaft tube fixing seat facing the motor shaft, a distal end of the motor shaft is fixedly connected to the connecting member of the shaft tube fixing seat, a proximal end of the outer tube is fixedly connected to the distal end of the shaft tube fixing seat, a proximal end of the inner tube is fixedly connected to the proximal end of the housing, and the inner tube penetrates through the shaft tube fixing seat and is disposed in the outer tube.

6. The system as claimed in claim 4, wherein the motor shaft has a hollow cavity for the inner tube to pass through, the motor shaft is coaxially disposed with the shaft tube fixing seat, the distal end of the motor shaft is fixedly connected to the proximal end of the shaft tube fixing seat, the proximal end of the outer tube is fixedly connected to the distal end of the shaft tube fixing seat, the proximal end of the inner tube is fixed to the proximal end of the housing, and the inner tube passes through the motor shaft and the shaft tube fixing seat and is disposed in the outer tube.

7. The delivery system for delivering an implant according to claim 6, wherein the distal end of the motor shaft is provided with an external thread and a boss end surface, and the proximal end of the shaft tube holder is provided with an internal thread matching the external thread.

8. The delivery system for delivering an implant according to claim 5 or 6, wherein the shaft tube holder is provided with an outer tube emptying tube, and the outer tube emptying tube extends out and is exposed out of the housing.

9. A delivery system for delivering an implant according to claim 5 or 6, wherein the catheter assembly comprises a purge tap, a proximal end of the purge tap being disposed outside the housing, a distal end of the purge tap being connected to the proximal end of the inner tube.

10. The delivery system according to claim 5 or 6, wherein the catheter assembly comprises a stabilizer assembly, the stabilizer assembly comprises a stabilizer tube and a stabilizer holder, the stabilizer holder is fixed to the distal end of the housing, the proximal end of the stabilizer tube is connected to the distal end of the stabilizer holder, the outer tube penetrates through the stabilizer holder and the stabilizer tube, and a stabilizer emptying tube is disposed on the stabilizer holder and extends out of and exposes out of the housing.

Images