Myocardial filling system with feedback mechanism

Abstract

The invention belongs to the technical field of myocardial filling, and discloses a myocardial filling system with a feedback mechanism, which comprises a filling unit, a propelling module and a connecting unit, the propelling module is located between the filling unit and the connecting unit, the propelling module comprises a propelling unit and a linkage unit, the propelling unit is connected with the connecting unit, and the linkage unit is connected with the connecting unit. The linkage unit is connected with the filling unit; the propelling unit comprises a butt-joint piece, one end of the butt-joint piece is detachably connected with a butt-joint pipe, the butt-joint pipe is connected with the connecting unit, the end, away from the connecting unit, of the butt-joint piece is fixedly connected with a first propelling pipe, the first propelling pipe is in through connection with the butt-joint pipe, and an annular air bag is fixed to the circumferential wall of the inner side of the first propelling pipe; according to the invention, through injection of the injection, the filling efficiency is based on the expansion of the volume of the air bag caused by the magnetorheological fluid layer, so that the magnetic induction lines of the magnetic field are cut by the conductor to form induced current, finally, the specific improvement of the injection injection rate and the system filling efficiency is quantified, and the establishment of an intermediate medium of a feedback mechanism is completed.

Description

Technical Field

[0001] The present invention belongs to the technical field of myocardial filling, and in particular relates to a myocardial filling system with a feedback mechanism. Background Art

[0002] In medical fields such as minimally invasive surgery for tissue injection filling, the key to treatment is to use a suitable injection device or filling system to inject a specific amount or volume of injectable (including filler) into the target area or specific location (including injection depth) of the tissue to be treated or repaired. Tissues suitable for injection filling are mainly divided into two categories. The first category is facial or external tissues that are mostly used for modification or beauty purposes, such as cheeks, forehead, nose, chest, buttocks, etc. The second category is internal tissues or organs that have emerged in recent years for the purpose of disease treatment or repair, such as the myocardial wall and blood vessel wall of the heart. The above-mentioned tissues have a certain degree of elasticity, but most of them are relatively dense structures. For myocardial injection filling, up to 20 times of point selection and targeted positioning are required. The preferred operating channels for this operation include: a minimally invasive approach through a small chest incision to reach the outer surface of the heart (epicardium) under laparoscope, and an interventional approach through the femoral artery along the arterial system to reach the inner surface of the heart (endocardium of the left ventricular cavity). However, the heart is a complex three-dimensional structure with curved and uneven inner and outer surfaces. In addition, the above-mentioned minimally invasive operating channels have relative limitations, making multiple point selections and accurate targeted positioning extremely challenging. It is no longer possible to achieve this using traditional syringes, resulting in prolonged surgery and risks to the life safety of the target population or patients.

[0003] However, there are still many operational problems in the existing myocardial filling system that have not been overcome. Domestic scholars and engineers have made some conceptual attempts.

[0004] For example, a transmission-separated and controllable myocardial filling system disclosed in a Chinese patent with publication number CN115462879A enters the body through an incision, operates the guide handle to bend the guide tube, and then the guide tube passes through the aortic arch and the aortic valve to reach the left ventricle, operates the first operating handle and the second operating handle, the outer sheath tube enters the left ventricle through the guide tube, operates the bending adjuster to bend the outer sheath tube, rotates the transmission kit to push the pressing tube to stably reach the target position, then operates the needle ejector to allow the puncture tube to penetrate the target position, and operates the injection part to inject gel into the myocardium. After the injection is completed, operates the needle ejector to retract the puncture tube, press the button, separate the transmission part from the moving part, operate the second operating handle to withdraw relative to the first operating handle, retract the pressing tube, rotate the first operating handle, operate the bending adjuster, find another location where injection is required, and achieve multiple injections.

[0005] First, during the filling process, the above-mentioned filling system operates the injection piece to inject gel into the myocardium to complete the injection. It can be seen that during the injection process, there is a lack of a feedback mechanism that directly reflects the filling liquid flow rate, flow rate and filling rate. This is because the filling liquid accumulates in the first operating handle, the second operating handle, each kit and pipeline, and the specific filling operation is difficult to observe with the naked eye. Therefore, the myocardial filling system still needs to build a mechanism with filling feedback. Summary of the invention

[0006] In view of the shortcomings of the prior art, the object of the present invention is to provide a myocardial filling system with a feedback mechanism to solve the problems raised in the above background technology.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A myocardial filling system with a feedback mechanism comprises a filling unit, a propulsion module and a connection unit, wherein the propulsion module is located between the filling unit and the connection unit, the propulsion module comprises a propulsion unit and a linkage unit, the propulsion unit is connected to the connection unit, and the linkage unit is connected to the filling unit;

[0009] The propulsion unit includes a docking piece, one end of which is detachably connected to a docking tube, which is connected to the connection unit, and the end of the docking piece away from the connection unit is fixedly connected to a first propulsion tube, which is connected to the docking tube through-connection, an annular airbag is fixed on the inner peripheral wall of the first propulsion tube, and a magnetorheological fluid layer is filled in the airbag, a conductive ring is rotatably sleeved on the outer peripheral wall of the first propulsion tube, and a plurality of conductors are fixed on the outer peripheral wall of the conductive ring, and the plurality of conductors are evenly distributed in a ring shape around the central axis of the conductive ring;

[0010] A pair of propulsion seats are arranged outside the multiple conductors evenly distributed in an annular shape. The two propulsion seats are symmetrically placed about the central axis of the conduction circle. A permanent magnet is slidably connected inside the propulsion seats. The end of the permanent magnet close to the central axis of the conduction circle slides through the propulsion seat. The end of the permanent magnet away from the central axis of the conduction circle is fixed with an insulating member. A telescopic cylinder is installed on the propulsion seat. The output end of the telescopic cylinder is fixed with the insulating member. The telescopic cylinder is used to drive the permanent magnet to approach or move away from the conduction circle.

[0011] The connection unit comprises a first injection tube, the first injection tube is rotatably clamped with a screw rod at the end close to the propulsion unit, a separation piece is fixedly sleeved on the screw rod, a second injection tube is sleeved with a threaded connection at the end of the screw rod away from the first injection tube, and a third injection tube is fixedly mounted at the end of the second injection tube away from the first injection tube;

[0012] The propulsion unit is arranged in the second injection tube, the linkage unit is arranged in the third injection tube, the filling unit is installed at one end of the third injection tube away from the second injection tube, and the end of the propulsion seat away from the conductive ring is fixed to the inner wall of the second injection tube;

[0013] The end of the first propulsion tube away from the docking piece is fixedly connected to the second propulsion tube, and the first propulsion tube and the second propulsion tube are both installed in the second injection tube by a limiting structure;

[0014] The limiting structure includes two hanging plates respectively sleeved on the first propulsion tube and the second propulsion tube, each hanging plate is fixed with a first fitting surface, the outer end surface of the first fitting surface abuts against the inner wall of the second injection tube, the inner end surface of the first fitting surface is fixed with a second fitting surface in the shape of a concave arc surface, the first propulsion tube corresponds to the second fitting surface on the hanging plate and is in close contact with the outer peripheral wall of the first propulsion tube, and the second propulsion tube corresponds to the second fitting surface on the hanging plate and is in close contact with the outer peripheral wall of the second propulsion tube;

[0015] The linkage unit includes a discharge pipe, the discharge pipe is located at one end of the second propulsion pipe away from the first propulsion pipe, a meshing end is fixed to the end of the discharge pipe away from the second propulsion pipe, the meshing end is used to seal and block the end of the discharge pipe away from the second propulsion pipe, a butt guide pipe is fixed on the peripheral wall of the discharge pipe, the butt guide pipes are connected to the inside of the discharge pipe, the other ends of the butt guide pipes are connected to the filling unit, a transmission gear is meshed and connected to the meshing end, the transmission gear is coaxially placed with the discharge pipe, and the transmission gear is fixedly installed on the filling unit;

[0016] The filling unit includes a middle tube arranged on the third injection tube, the middle tube and the transmission gear are placed coaxially, one end of the middle tube is located inside the third injection tube, the other end of the middle tube passes through the end of the third injection tube away from the second injection tube, and the middle tube is rotatably connected to the third injection tube, the transmission gear is fixedly sleeved on the middle tube, the ends of the connecting tubes away from the discharge tube are fixed to the middle tube, and the connecting tubes are connected through the inside of the middle tube, a limiting member is fixed to the end of the middle tube located inside the third injection tube, the limiting member seals and blocks the end of the middle tube, a limiting bayonet is provided on the limiting member, a limiting rod is slidably connected in the limiting bayonet, the limiting rod is vertically placed with the middle tube, and one end of the limiting rod slides through the peripheral wall of the third injection tube;

[0017] One end of the middle tube away from the limiting member is fixedly connected with a storage tube, the middle tube is connected to the storage tube tank body, a storage cavity is provided inside the storage tube, the inner diameter of the storage cavity is larger than the inner diameter of the middle tube, a buffer disk is slidably connected in the storage cavity, the peripheral wall of the buffer disk is in contact with the inner peripheral wall of the storage cavity, the buffer disk can slide in the storage cavity along the axis direction of the middle tube, at least one pair of symmetrically placed telescopic rods is fixed to one side of the buffer disk away from the limiting member, the other end of the telescopic rods is fixed to the cavity wall of the storage cavity away from the limiting member end, a spring is sleeved on the telescopic rod, one end of the spring is fixed to the buffer disk, the other end of the spring is fixed to the cavity wall of the storage cavity away from the limiting member end, and a plurality of injection holes are provided on the buffer disk;

[0018] An injection head is fixedly installed at the end of the middle tube away from the limit piece, and four expansion plates evenly distributed in a ring are arranged inside the injection head. The expansion plates are connected to the inner wall of the injection head through telescopic parts, and the end of the expansion plate close to the storage cavity shrinks from the end close to the storage cavity to the end away from the storage cavity toward the central axis end of the middle tube.

[0019] Beneficial effects of the present invention:

[0020] The injection and filling efficiency of the injection liquid is based on the expansion of the airbag volume caused by the magnetorheological fluid layer. Therefore, the conductor cuts the magnetic flux lines of the magnetic field to form an induced current. The size of the induced electromotive force determines the size of the injection liquid being squeezed at this time. Finally, the specific improvement of the injection liquid injection rate and the system filling efficiency is quantified, completing the construction of the intermediate medium of the feedback mechanism.

[0021] After the first injection tube and the second injection tube are quickly separated, the connecting tube is manually rotated, and the connecting tube drives the docking piece, the first propulsion tube, the second propulsion tube, the discharge tube and the meshing end in turn, and the meshing end drives the transmission gear to rotate, and the transmission gear drives the filling unit to rotate, so that the filling unit can rotate during the filling process, which can avoid the clogging of the filling liquid to a certain extent, and speed up the filling efficiency and the success rate of the myocardial filling operation;

[0022] A buffer tray is provided to prevent the balloon from expanding too much and causing excessive squeezing of the filling liquid by the internal air pressure, thereby preventing the filling liquid from having excessive impact force, thereby ensuring smooth filling. The injection area of ​​the injection head opens automatically according to the pressure, completing the last link of the automatic feedback adjustment mechanism of the injection intensity, thereby preventing excessive injection force from damaging the myocardial tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the front view structure splitting of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the propulsion unit and the filling unit of the present invention;

[0027] Figure 4 Schematic diagrams of the propulsion unit and the filling unit of the present invention from different viewing angles;

[0028] Figure 5It is a schematic diagram of the structure of the limiting structure of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the spring part of the present invention;

[0030] Figure 7 It is a partial structural schematic diagram of the propulsion pipe of the present invention;

[0031] Figure 8 It is a partial structural schematic diagram of the propulsion seat of the present invention;

[0032] Fig. 9 It is a schematic diagram of the conductor structure of the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figures 1 to 9 As shown, a myocardial filling system with a feedback mechanism includes a filling unit, a propulsion module and a connection unit, wherein the propulsion module is located between the filling unit and the connection unit, the propulsion module includes a propulsion unit and a linkage unit, the propulsion unit is connected to the connection unit, and the linkage unit is connected to the filling unit;

[0035] The propulsion unit includes a docking piece 101, one end of the docking piece 101 is detachably connected to a docking tube 102, the docking tube 102 is connected to the connection unit, the end of the docking piece 101 away from the connection unit is fixedly connected to a first propulsion tube 104, the first propulsion tube 104 is connected through the docking tube 102, an annular airbag 105 is fixed on the inner peripheral wall of the first propulsion tube 104, the airbag 105 is filled with a magnetorheological fluid layer 106, a conductive ring 107 is rotatably sleeved on the outer peripheral wall of the first propulsion tube 104, a plurality of conductors 108 are fixed on the outer peripheral wall of the conductive ring 107, and the plurality of conductors 108 are evenly distributed in a ring shape around the central axis of the conductive ring 107;

[0036] A pair of propulsion seats 110 are provided outside the multiple conductors 108 evenly distributed in an annular shape. The two propulsion seats 110 are symmetrically placed about the central axis of the conduction circle 107. A permanent magnet 109 is slidably connected inside the propulsion seats 110. The end of the permanent magnet 109 close to the central axis of the conduction circle 107 slides through the propulsion seats 110. The end of the permanent magnet 109 away from the central axis of the conduction circle 107 is fixed with an insulating member 111. A telescopic cylinder 112 is installed on the propulsion seats 110. The output end of the telescopic cylinder 112 is fixed to the insulating member 111. The telescopic cylinder 112 is used to drive the permanent magnet 109 to approach or move away from the conduction circle 107.

[0037] Preferably, a limiting ring 103 is sleeved on the outer end surface of the docking piece 101 to ensure the stability of the docking connection of the docking piece 101;

[0038] The butt joint pipe 102 needs to be cleaned after the injection is completed, so the butt joint pipe 102 can be detached from the butt joint 101. Then the connection method can be selected by connecting with a seal or setting a thread at one end of the butt joint pipe 102 connected to the butt joint 101, and setting a corresponding thread groove on the butt joint 101. Other detachable connection methods are also acceptable.

[0039] Preferably, the material of the conductor 108 can be selected from aluminum which has good conductivity and ductility;

[0040] The conductive ring 107 is provided to better install the conductor 108, and the conductive ring 107 plays a buffering role in the conduction path. Then, by monitoring the magnitude of the induced electromotive force of any part of the conductive ring 107 or the propulsion tube, real-time feedback of the injection degree of the myocardial filling solution is obtained;

[0041] In the present application, when the conductor 108 is in contact with the permanent magnet 109 controlled by the telescopic cylinder 112, its magnetism is conducted on the conductor 108 and transmitted to the first propulsion tube 104 through the conduction ring 107. After the first propulsion tube 104 is attached with a magnetic field, the magnetorheological fluid layer 106 changes from a liquid state to a solid-like or solid state due to its own characteristics after the magnetic field is applied, thereby causing the volume of the wrapped airbag 105 to increase, resulting in the squeezing of the filling liquid in the first propulsion tube 104. At the same time, the air pressure in the first propulsion tube 104 and the related pipelines in the propulsion unit for injecting the filling liquid increases, so the injection and filling efficiency of the injection liquid is improved. Further, in this embodiment, the injection and filling efficiency of the injection liquid are improved. The high value is based on the expansion of the volume of the airbag 105 caused by the magnetorheological fluid layer 106. In order to provide a feedback mechanism for the injection rate, the induced electromotive force of the conductive ring 107 or any component of the first propulsion tube 104 is monitored. The size of the induced electromotive force requires the rotation of the first propulsion tube 104. When the first propulsion tube 104 is driven to rotate by the connecting unit, the conductor 108 follows the rotation. Therefore, the conductor 108 cuts the magnetic flux lines of the magnetic field to form an induced current. Therefore, the rotation speed is controlled to be a quantitative r. The size of the magnetic field is determined by the size of the induced electromotive force, thereby determining the size of the injection fluid being squeezed at this time. Finally, the specific improvement of the injection rate of the injection fluid and the filling efficiency of the system is quantified, completing the construction of the intermediate medium of the feedback mechanism.

[0042] The connecting unit includes a first injection tube 201, the first injection tube 201 is rotatably clamped with a screw rod 204 at the end close to the propulsion unit, a separation piece 205 is fixedly sleeved on the screw rod 204, a second injection tube 202 is sleeved with a threaded connection at the end of the screw 204 away from the first injection tube 201, and a third injection tube 203 is fixed to the end of the second injection tube 202 away from the first injection tube 201;

[0043] The propulsion unit is disposed in the second injection tube 202, the linkage unit is disposed in the third injection tube 203, the filling unit is installed at one end of the third injection tube 203 away from the second injection tube 202, and the end of the propulsion seat 110 away from the conductive ring 107 is fixed to the inner wall of the second injection tube 202;

[0044] Preferably, a circular block is fixed to the end of the screw 204 close to the first injection tube 201, and a circular groove is provided on the inner peripheral wall of the circular block. One end of the first injection tube 201 is rotatably connected to the circular block, and a clamping ring is fixedly sleeved on the first injection tube 201, and the clamping ring is rotatably connected to the circular groove, so as to realize the rotatable clamping connection between the first injection tube 201 and the screw 204;

[0045] When the rotating separation piece 205 drives the screw 204 to rotate, one end of the screw 204 rotates with the first injection tube 201, and the other end of the screw 204 is threadedly transmitted with the second injection tube 202, finally separating or connecting the screw 204 with the second injection tube 202, thereby realizing the rapid separation or installation of the first injection tube 201 and the second injection tube 202.

[0046] One end of the first propulsion tube 104 away from the docking piece 101 is fixedly connected to the second propulsion tube 113, and both the first propulsion tube 104 and the second propulsion tube 113 are installed in the second injection tube 202 by a limiting structure; thereby ensuring the stability of the connection between the first propulsion tube 104 and the second propulsion tube 113, while ensuring the stability during the myocardial filling fluid injection process, and when the first injection tube 201 and the second injection tube 202 are separated, the setting of the limiting structure can further ensure the stability of the second injection tube 202.

[0047] The limiting structure includes two hanging plates 206 respectively sleeved on the first propulsion tube 104 and the second propulsion tube 113, and a first fitting surface 209 is fixed on each of the hanging plates 206. The outer end surface of the first fitting surface 209 abuts against the inner wall of the second injection tube 202, and a second fitting surface 210 in the shape of a concave arc is fixed on the inner end surface of the first fitting surface 209. The first propulsion tube 104 corresponds to the second fitting surface 210 on the hanging plate 206 and is in close contact with the outer peripheral wall of the first propulsion tube 104, and the second propulsion tube 113 corresponds to the second fitting surface 210 on the hanging plate 206 and is in close contact with the outer peripheral wall of the second propulsion tube 113;

[0048] Preferably, the two suspension plates 206 are both provided with a first opening 207 and a second opening 208, and the two suspension plates 206 are connected together by bolts, the first opening 207 and the second opening 208, and the separate limiting structures are connected together to ensure stability to the greatest extent.

[0049] The linkage unit includes a discharge pipe 301, which is located at the end of the second propulsion pipe 113 away from the first propulsion pipe 104. A meshing end 303 is fixed to the end of the discharge pipe 301 away from the second propulsion pipe 113. The meshing end 303 is used to seal and block the end of the discharge pipe 301 away from the second propulsion pipe 113. A connecting pipe 302 is fixed on the peripheral wall of the discharge pipe 301. The connecting pipes 302 are connected to the inside of the discharge pipe 301 through the connecting pipes 302. The other ends of the connecting pipes 302 are connected to the filling unit. A transmission gear 304 is meshed and connected to the meshing end 303. The transmission gear 304 is coaxially placed with the discharge pipe 301, and the transmission gear 304 is fixedly installed on the filling unit. Element; through the setting of the connecting tube 302, the filling liquid in the propulsion unit can enter the filling unit; when the first injection tube 201 and the second injection tube 202 are quickly separated, when the docking tube 102 is rotated manually or driven by a motor to rotate, the docking tube 102 drives the docking piece 101, the first propulsion tube 104, the second propulsion tube 113, the discharge tube 301 and the meshing end 303 in turn, the meshing end 303 drives the transmission gear 304 to rotate, and the transmission gear 304 drives the filling unit to rotate, so the filling unit realizes rotation during the filling process, avoids filling liquid blockage to a certain extent, and speeds up the filling efficiency and the success rate of myocardial filling surgery.

[0050] The filling unit includes a middle tube 401 disposed on the third injection tube 203, the middle tube 401 and the transmission gear 304 are placed coaxially, one end of the middle tube 401 is located inside the third injection tube 203, the other end of the middle tube 401 passes through the end of the third injection tube 203 away from the second injection tube 202, and the middle tube 401 is rotatably connected to the third injection tube 203, the transmission gear 304 is fixedly sleeved on the middle tube 401, and the end of the receiving tube 302 away from the discharge tube 301 is connected to the middle tube 401 is fixed, and the connecting tube 302 is connected with the inside of the middle tube 401 through the middle tube 401. The end of the middle tube 401 located inside the third injection tube 203 is fixed with a limiting member 402, and the limiting member 402 seals and blocks the end of the middle tube 401. The limiting member 402 is provided with a limiting bayonet 403, and a limiting rod 404 is slidably connected in the limiting bayonet 403. The limiting rod 404 is placed vertically with the middle tube 401, and one end of the limiting rod 404 slides through the peripheral wall of the third injection tube 203;

[0051] Preferably, a lifting block is fixed to one end of the limiting rod 404 that passes through the peripheral wall of the third injection tube 203. The lifting block facilitates pulling the limiting rod 404 to move, and at the same time prevents the limiting rod 404 from completely contracting and entering the third injection tube 203. If rotation injection is not required during the myocardial filling process, the limiting member 402 and the middle tube 401 are limited by the limiting rod 404 to ensure the stability of the injection. When rotation injection is required, the limiting rod 404 is pulled out to cancel the limiting constraint on the middle tube 401.

[0052] A storage tube 406 is fixedly connected to one end of the middle tube 401 away from the limiting member 402, and the middle tube 401 is connected to the tank body of the storage tube 406. A storage cavity 407 is provided inside the storage tube 406. The inner diameter of the storage cavity 407 is larger than the inner diameter of the middle tube 401. A buffer plate 408 is slidably connected inside the storage cavity 407. The peripheral wall of the buffer plate 408 fits the inner peripheral wall of the storage cavity 407. The buffer plate 408 can slide in the storage cavity 407 along the axis direction of the middle tube 401. At least one pair of symmetrically placed telescopic rods 409 are fixed to one side of the buffer plate 408 away from the limiting member 402. The other end of the telescopic rod 409 is fixed to the cavity wall of the storage cavity 407 away from the limit piece 402, and a spring 412 is sleeved on the telescopic rod 409. One end of the spring 412 is fixed to the buffer disk 408, and the other end of the spring 412 is fixed to the cavity wall of the storage cavity 407 away from the limit piece 402. A plurality of injection holes are provided on the buffer disk 408. This can avoid excessive impact force of the filling liquid, avoid excessive expansion of the airbag 105 causing excessive internal air pressure to squeeze the filling liquid, and ensure smooth filling. The spring 412 can provide a certain buffer and ensure the reset of the buffer disk 408.

[0053] An injection head 411 is fixedly installed at the end of the middle tube 401 away from the limit member 402, and four expansion plates 410 evenly distributed in a ring are arranged inside the injection head 411. The expansion plates 410 are connected to the inner wall of the injection head 411 by telescopic parts, and the ends of the expansion plates 410 close to the storage chamber 407 shrink from the end close to the storage chamber 407 to the end away from the storage chamber 407 toward the central axis end of the middle tube 401; since the end of the expansion plate 410 close to the storage chamber 407 is an open arc, after the filling liquid is quickly injected into the injection head 411, the open arc expansion plate 410 is subjected to an oblique upward squeezing force. From the force analysis, it can be seen that there is an upward squeezing force on the expansion plate 410, so the injection area of ​​the injection head 411 is open, completing the last link of the automatic feedback adjustment mechanism of the automatic injection intensity, avoiding excessive injection force to damage the myocardial tissue.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A myocardial filling system with a feedback mechanism, characterized in that: It includes a filling unit, a propulsion module and a connection unit. The propulsion module is located between the filling unit and the connection unit. The propulsion module includes a propulsion unit and a linkage unit. The propulsion unit is connected to the connection unit, and the linkage unit is connected to the filling unit. The propulsion unit comprises a docking piece (101), one end of the docking piece (101) is detachably connected to a docking tube (102), the docking tube (102) is connected to the connection unit, the docking piece (101) is fixedly connected to an end away from the connection unit with a first propulsion tube (104), the first propulsion tube (104) is connected to the docking tube (102), an annular air bag (105) is fixed on the inner peripheral wall of the first propulsion tube (104), the air bag (105) is filled with a magnetorheological fluid layer (106), a conductive ring (107) is rotatably sleeved on the outer peripheral wall of the first propulsion tube (104), a plurality of conductors (108) are fixed on the outer peripheral wall of the conductive ring (107), and the plurality of conductors (108) are evenly distributed in a ring shape around the central axis of the conductive ring (107); A pair of propulsion seats (110) are arranged outside the plurality of conductors (108) uniformly distributed in an annular shape. The two propulsion seats (110) are symmetrically placed about the central axis of the conduction circle (107). A permanent magnet (109) is slidably connected inside the propulsion seats (110). The end of the permanent magnet (109) close to the central axis of the conduction circle (107) slides through the propulsion seats (110). The end of the permanent magnet (109) away from the central axis of the conduction circle (107) is fixed with an insulating member (111). A telescopic cylinder (112) is installed on the propulsion seats (110). The output end of the telescopic cylinder (112) is fixed to the insulating member (111). The telescopic cylinder (112) is used to drive the permanent magnet (109) to approach or move away from the conduction circle (107).

2. The myocardial filling system with feedback mechanism according to claim 1, characterized in that: The connection unit comprises a first injection tube (201), the first injection tube (201) is rotatably clamped with a screw rod (204) at an end close to the propulsion unit, a separation piece (205) is fixedly sleeved on the screw rod (204), an end of the screw rod (204) away from the first injection tube (201) is sleeved with a second injection tube (202) threadedly connected, and an end of the second injection tube (202) away from the first injection tube (201) is fixed with a third injection tube (203); The propulsion unit is arranged in the second injection tube (202), the linkage unit is arranged in the third injection tube (203), the filling unit is installed at one end of the third injection tube (203) away from the second injection tube (202), and the end of the propulsion seat (110) away from the conductive ring (107) is fixed to the inner wall of the second injection tube (202).

3. The myocardial filling system with feedback mechanism according to claim 2, characterized in that: One end of the first propulsion tube (104) away from the docking piece (101) is fixedly connected to the second propulsion tube (113), and both the first propulsion tube (104) and the second propulsion tube (113) are installed in the second injection tube (202) by a limiting structure.

4. The myocardial filling system with feedback mechanism according to claim 3, characterized in that: The limiting structure comprises two hanging plates (206) respectively sleeved on the first propulsion tube (104) and the second propulsion tube (113); a first fitting surface (209) is fixed on each hanging plate (206); the outer end surface of the first fitting surface (209) abuts against the inner wall of the second injection tube (202); a second fitting surface (210) in the shape of a concave arc is fixed on the inner end surface of the first fitting surface (209); the first propulsion tube (104) corresponds to the second fitting surface (210) on the hanging plate (206) and is in close contact with the outer peripheral wall of the first propulsion tube (104); and the second propulsion tube (113) corresponds to the second fitting surface (210) on the hanging plate (206) and is in close contact with the outer peripheral wall of the second propulsion tube (113).

5. The myocardial filling system with feedback mechanism according to claim 4, characterized in that: The linkage unit comprises a discharge pipe (301), wherein the discharge pipe (301) is located at one end of the second propulsion pipe (113) away from the first propulsion pipe (104), and a meshing end (303) is fixed to the end of the discharge pipe (301) away from the second propulsion pipe (113), and the meshing end (303) is used to seal and block the end of the discharge pipe (301) away from the second propulsion pipe (113). A pair of guide pipes (302) are fixed on the peripheral wall of the discharge pipe (301), and the guide pipes (302) are connected to the inside of the discharge pipe (301) through and through, and the other ends of the guide pipes (302) are connected to the filling unit, and a transmission gear (304) is meshedly connected to the meshing end (303), and the transmission gear (304) and the discharge pipe (301) are coaxially arranged, and the transmission gear (304) is fixedly installed on the filling unit.

6. The myocardial filling system with feedback mechanism according to claim 5, characterized in that: The filling unit comprises a middle tube (401) arranged on the third injection tube (203), the middle tube (401) and the transmission gear (304) are arranged coaxially, one end of the middle tube (401) is located inside the third injection tube (203), the other end of the middle tube (401) passes through the third injection tube (203) and is away from one end of the second injection tube (202), and the middle tube (401) is rotatably connected with the third injection tube (203), the transmission gear (304) is fixedly sleeved on the middle tube (401), and the end of the connecting tube (302) away from the discharge tube (301) is connected to the middle tube ( The middle tube (401) is fixed, and the connecting tube (302) is connected to the inside of the middle tube (401). A limiting piece (402) is fixed to the end of the middle tube (401) located inside the third injection tube (203). The limiting piece (402) seals and blocks the end of the middle tube (401). A limiting slot (403) is provided on the limiting piece (402). A limiting rod (404) is slidably connected in the limiting slot (403). The limiting rod (404) is vertically placed with the middle tube (401), and one end of the limiting rod (404) slides through the peripheral wall of the third injection tube (203).

7. The myocardial filling system with feedback mechanism according to claim 6, characterized in that: One end of the middle tube (401) away from the stopper (402) is fixedly connected with a storage tube (406), the middle tube (401) is connected to the storage tube (406) tank body, a storage cavity (407) is provided inside the storage tube (406), the inner diameter of the storage cavity (407) is larger than the inner diameter of the middle tube (401), a buffer plate (408) is slidably connected inside the storage cavity (407), the peripheral wall of the buffer plate (408) is in contact with the inner peripheral wall of the storage cavity (407), and the buffer plate (408) can be moved along the axis direction of the middle tube (401) in the storage cavity (407) Sliding, at least one pair of symmetrically placed telescopic rods (409) is fixed on one side of the buffer disk (408) away from the limiting member (402), the other ends of the telescopic rods (409) are fixed to the cavity wall of the storage cavity (407) away from the limiting member (402), the telescopic rods (409) are sleeved with springs (412), one end of the springs (412) is fixed to the buffer disk (408), and the other end of the springs (412) is fixed to the cavity wall of the storage cavity (407) away from the limiting member (402), and the buffer disk (408) is provided with a plurality of injection holes.

8. The myocardial filling system with feedback mechanism according to claim 7, characterized in that: An injection head (411) is fixedly mounted on the end of the middle tube (401) away from the stopper (402), and four expansion plates (410) are evenly distributed in an annular shape inside the injection head (411). The expansion plates (410) are connected to the inner wall of the injection head (411) via telescopic parts, and one end of the expansion plate (410) close to the storage cavity (407) is contracted from the end close to the storage cavity (407) to the end away from the storage cavity (407) in a shape of contraction towards the central axis end of the middle tube (401).

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