A delivery system for an atrial shunt

Abstract

The application discloses a kind of delivery systems for atrial shunt, including delivery structure, control structure for controlling the axial movement of delivery structure;The delivery structure includes delivery sheath, push rod through delivery sheath;Control structure includes control part and transmission part connected with each other;The distal end of transmission part is connected with push rod, and rotating control part to drive transmission part movement, in turn make transmission part drive push rod movement along the channel formed by delivery sheath.The application integrates the multiple functions of traditional atrial shunt delivery device, such as loading, delivery and release, on one handle, reduces the complexity of the device, is easy to operate, improves the acceptance speed of the device for doctors.Finally, the application divides the control structure into first control part and second control part, flexibly meets the requirements of refinement and saving operation time in actual operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, and in particular to a delivery system for an atrial shunt. BACKGROUND

[0002] Heart failure, abbreviated as HF, is a syndrome caused by the heart's inability to pump enough blood to meet the body's needs. It is a common condition that affects millions of people worldwide. Heart failure is a chronic condition that can worsen over time if not properly managed. It is a condition in which the heart muscle becomes too weak to pump enough blood to meet the body's needs. This can lead to a buildup of fluid in the lungs, causing shortness of breath, and fluid buildup in the legs and feet, causing swelling. Heart failure can be caused by a variety of factors, including high blood pressure, coronary artery disease, heart valve problems, and heart muscle disease.

[0003] Heart failure can be classified based on the location of the heart where the failure occurs. There are three types of heart failure: (1) Left-sided heart failure: This type of heart failure occurs when the left ventricle of the heart is unable to pump enough blood to meet the body's needs. It is the most common type of heart failure and is often caused by high blood pressure, coronary artery disease, or heart valve problems. (2) Right-sided heart failure: This type of heart failure occurs when the right ventricle of the heart is unable to pump enough blood to meet the body's needs. It is less common than left-sided heart failure and is often caused by lung disease or certain congenital heart defects. (3) Biventricular heart failure: This type of heart failure occurs when both the left and right ventricles of the heart are unable to pump enough blood to meet the body's needs. It is a more severe form of heart failure and is often caused by advanced coronary artery disease or heart muscle disease.

[0004] One of the existing solutions to chronic heart failure caused by persistent high pressure in the left atrium is to implant a shunt device in the atrial septum between the left and right atria. This redistributes the pressure between the left and right atria and reduces the pressure imbalance.

[0005] The common implantation method of the shunt device is to first compress the shunt device on a loader, then use a delivery device to deliver the shunt device to the pre-designated position of the atrial septum for positioning, then withdraw the delivery device to release the shunt device until the shunt device is fully released and opened. However, the delivery device currently available on the market for atrial shunt devices is too complex in composition, causing a significant economic burden on patients and their families. Therefore, it is necessary to develop an implantable atrial shunt device that is rich in functions, easy to operate, and saves surgery time to benefit the majority of patients and their families. SUMMARY

[0006] The purpose of the present application is to overcome the defects of the prior art and provide a delivery system for an atrial shunt.

[0007] To achieve the above purpose, the present application adopts the following technical solutions:

[0008] A delivery system for an atrial shunt, comprising a delivery structure and a control structure for controlling the axial movement of the delivery structure; the delivery structure comprises a delivery sheath and a push rod passing through the delivery sheath; the control structure comprises a control part and a transmission part connected to each other; the distal end of the transmission part is connected to the push rod, and the rotation of the control part drives the movement of the transmission part, thereby causing the transmission part to drive the push rod to move along the channel formed by the delivery sheath.

[0009] Further, the control part comprises a first screw rod and a first threaded cylinder threadedly connected with the first screw rod; a distal end of the first threaded cylinder is connected with the conducting part; the first threaded cylinder moves along an axial direction of the first threaded cylinder under the driving of the first screw rod, so as to drive the push rod to move.

[0010] Further, the control part comprises a second screw rod and a second threaded cylinder threadedly connected with the second screw rod; a distal end of the second threaded cylinder is connected with the conducting part; the second threaded cylinder moves along an axial direction of the second threaded cylinder under the driving of the second screw rod, so as to drive the push rod to move.

[0011] Further, the first screw rod is a hollow structure with both ends being open, and a distal end of the first screw rod is sleeved on the second screw rod; a pitch of the second screw rod is smaller than a pitch of the first screw rod.

[0012] Further, the control part further comprises a first knob, and the first knob is connected with the first screw rod through a nested connecting rod.

[0013] Further, an annular boss is arranged on an outer circumferential surface of the second screw rod close to a proximal end, a first groove is arranged in the first knob and is matched with the annular boss, and the annular boss of the second screw rod is arranged in the first groove.

[0014] Further, the conveying structure further comprises a shell, a proximal end of the conveying sheath is inserted into a distal end of the shell, and a proximal end of the shell is provided with a clamping block; an outer circumferential surface of the first knob is provided with a second groove matched with the clamping block, and the clamping block is clamped in the second groove.

[0015] Further, the control part further comprises a second knob, a plurality of reinforcing ribs are arranged on an inner side of the second knob, a proximal end of the second screw rod is provided with a U-shaped groove matched with the reinforcing ribs, and the reinforcing ribs are inserted into the U-shaped groove, so that the second knob drives the reinforcing ribs to rotate.

[0016] Further, the conducting part comprises a push rod connecting piece, a first threaded cylinder connecting piece, and a first connecting rod, a distal end of the first connecting rod is connected with the push rod connecting piece, and a proximal end of the first connecting rod is connected with the first threaded cylinder connecting piece.

[0017] Further, the conducting part further comprises a second threaded cylinder connecting piece and a second connecting rod, a distal end of the second connecting rod is connected with the first threaded cylinder connecting piece, and a proximal end of the second connecting rod is connected with the second threaded cylinder connecting piece.

[0018] Further, a guide piece is arranged on an outer circumferential surface of the push rod connecting piece, a first guide groove matched with the guide piece is arranged on one side of the shell close to the distal end, and the first threaded cylinder and / or the second threaded cylinder moves along the first guide groove under the guidance of the guide piece.

[0019] Further, the distal end of the shell is also provided with a second guide groove matched with the guide piece, so that the guide piece moves along the second guide groove in the circumferential direction.

[0020] Further, the delivery structure further comprises an emptying part, the emptying part comprising a silica gel valve, an emptying tail, an emptying head, an emptying pipe, a three-way cock, the emptying tail and the proximal end of the emptying head being fixedly connected, the distal end of the emptying head being fixedly connected with the handle head, the silica gel valve being arranged inside the emptying part; the emptying head and one side of the handle head are both provided with a through hole through which one end of the emptying pipe passes, so that one end of the emptying pipe is installed in the through hole, and the other end of the emptying pipe is connected with the three-way cock.

[0021] Further, the distal end of the delivery sheath has a circular table, and the diameter of the distal end of the circular table is smaller than the diameter of the proximal end.

[0022] Compared with the prior art, the delivery device of the atrial shunt provided by the application firstly loads the atrial shunt into the distal end of the delivery structure through the linkage between the control structure and the loading structure, the distal end of the delivery structure sequentially passes through the right femoral vein, the inferior vena cava, and then enters the right atrium, and reaches the left atrium by expanding through the interatrial septum. By rotating the control structure, the left disc of the atrial shunt is released first, the delivery device is withdrawn, the right disc of the atrial shunt is released, and then the atrial shunt is released, and the delivery device is withdrawn from the human body.

[0023] The delivery device of the atrial shunt provided by the application integrates the loading, delivery and release functions of the conventional atrial shunt delivery device on one handle, reduces the complexity of the device, is easy to operate, and improves the acceptance speed of the device by doctors. Finally, the control structure is divided into a first control part and a second control part, which flexibly meets the requirements of refinement and saving of operation time in actual operation. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic diagram of a delivery system for an atrial shunt provided by embodiment one;

[0025] Figure 2 is a schematic diagram of a loading structure provided by embodiment one;

[0026] Figure 3 is a schematic diagram of a delivery sheath and an emptying part of a delivery structure provided by embodiment one;

[0027] Figure 4 is a schematic diagram of a delivery sheath provided by embodiment one;

[0028] Figure 5 is a schematic diagram of an emptying part provided by embodiment one;

[0029] Figure 6 is an A-A sectional view of the emptying part provided by embodiment one;

[0030] Figure 7 is a schematic view of an evacuation head provided by example one;

[0031] Figure 8 is a schematic view of an evacuation head provided by example one;

[0032] Figure 9 is a schematic view of an evacuation head provided by example one;

[0033] Figure 10 is a schematic view of a first control provided by example one;

[0034] Figure 11 is a schematic view of a first control provided by example one;

[0035] Figure 12 is a schematic view of a second control provided by example one;

[0036] Figure 13 is a schematic view of a conductive portion provided by example one;

[0037] Figure 14 is a schematic view of a conductive portion provided by example one;

[0038] Figure 15 is a schematic view of a first knob provided by example one;

[0039] Figure 16 is a schematic view of a first knob provided by example one;

[0040] Figure 17 is a schematic view of a first knob provided by example one;

[0041] Figure 18 is a schematic view of a second knob provided by example one;

[0042] Figure 19 is a schematic view of a second screw provided by example one;

[0043] Figure 20 is a schematic view of a push rod provided by example one;

[0044] Figure 21 is a schematic view of a push rod provided by example one;

[0045] Figure 22 is a schematic view of a push rod provided by example one;

[0046] Figure 23 is a schematic view of a push rod provided by example one;

[0047] Figure 24 is a schematic view of the transmission part provided in Example Five;

[0048] Wherein, 1. loading structure; 11. connecting piece; 12. push rod; 13. release handle; 2. delivery structure; 21. delivery sheath; 211. circular table; 212. sheath connecting piece; 22. delivery handle; 221. handle head; 222. shell; 2221. first guide groove; 2222. second guide groove; 223. stress protection tube; 224. clamping block; 23. emptying part; 231. silica gel valve; 232. emptying tail part; 233. emptying head part; 234. emptying tube; 235. three-way cock; 3. control structure; 31. control part; 32. transmission part; 311. first knob; 312. first screw rod; 313. first threaded cylinder; 314. nested connecting rod; 315. second annular groove; 316. first annular groove; 317. extension tube; 318. locking ring; 321. second knob; 322. second screw rod; 3221. annular boss; 323. second threaded cylinder; 324. reinforcing rib; 325. U-shaped groove; 326. fixing screw; 327. threaded hole; 331. push rod connecting piece; 332. first threaded cylinder connecting piece; 333. first connecting rod; 334. second threaded cylinder connecting piece; 335. second connecting rod; 336. guide piece; 4. atrial shunt; 5. atrial septum. DETAILED DESCRIPTION

[0049] The present application is described in greater detail by the specific embodiments below, from which those skilled in the art will readily discern the other advantages and purposes of the present application. The present application can also be implemented or applied by different specific embodiments, and the details in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0050] The purpose of the present application is to overcome the defects of the prior art, and provide a delivery system for an atrial shunt.

[0051] One embodiment of the delivery system for an atrial shunt provided by the present application, as shown in Figures 1-22 the drawing, comprises a loading structure 1, a delivery structure 2 and a control structure 3; the loading structure 1 comprises a connecting piece 11 and a push rod 12; the delivery structure 2 comprises a delivery sheath 21, a delivery handle 22 and an emptying part 23; the control structure 3 comprises a control part 31 and a transmission part 32. The distal end of the transmission part 32 is connected with the push rod 12, and the control part 31 is rotated to drive the transmission part 32 to move, thereby driving the push rod 12 to move along the channel formed by the delivery sheath 21.

[0052] As shown in Figures 2-3 The loading structure 1 includes a connecting piece 11 and a pushing rod 12, the proximal end of the connecting piece 11 is connected with the distal end of the pushing rod 12, the distal end of the connecting piece 11 is detachably connected with the atrial shunt 4, and the connection mode is not limited to, such as threaded connection, clamping connection, knotting, etc. The pushing rod 12 is a rod-shaped structure, and the cross section is not limited to regular shapes such as circular, polygonal, and irregular shapes. The pushing rod 12 passes through the delivery structure 2 and drives the atrial shunt 4 to move in the delivery structure 2 until the atrial shunt 2 is completely accommodated inside the distal end of the delivery sheath tube 21, and the loading of the atrial shunt 4 is completed.

[0053] In other embodiments, the material of the connecting piece 11 is one or more of a polymer composite material, stainless steel, and a metal alloy. The pushing rod 12 is a strip-shaped metal wire, a woven structure, and is made of one or more of a combination of metal materials with high softness and toughness, such as stainless steel and nickel-titanium alloy. The pushing rod 12 functions to load and push the atrial shunt 4 through the delivery sheath tube 21 into the atrial septum 5, and can be smoothly reversed and rotated to separate from the atrial shunt 4, and the pushing rod 12 is withdrawn out of the patient's body.

[0054] Figure 20 The pushing rod 12 drives the connecting piece 11 to push the atrial shunt 4 and completely pass through the atrial septum 5; Figure 21 The pushing rod 12 drives the connecting piece 11 to pull back part of the atrial shunt 4, so that the atrial shunt 4 is clamped on the atrial septum 5; Figure 22 After the atrial shunt 4 is delivered to the target position of the atrial septum 5, the connecting piece 11 is separated from the atrial shunt 4.

[0055] In other embodiments, as shown in Figures 3-9 The delivery structure 2 includes a delivery sheath tube 21, a delivery handle 22, and an emptying part 23.

[0056] The delivery sheath tube 21 is a hollow cylindrical structure with open ends, and the distal end of the delivery sheath tube 21 has a circular truncated cone 211 with a smaller diameter at the distal end than at the proximal end. The proximal end of the circular truncated cone 211 has a curved portion at the lower part, so that the central axis of the circular truncated cone 211 and the straight line on which the central axis of the proximal end of the delivery sheath tube 21 lies form an angle of 15-90 degrees, preferably 25-80 degrees, and more preferably 30-70 degrees.

[0057] The purpose of the circular truncated cone in this embodiment is to adapt to the blood vessel direction and more smoothly reach the right atrium of the patient, and to reduce the resistance when entering the body.

[0058] The material of the delivery sheath tube 21 is a polymer material and / or a spring, wherein the polymer material is one or a combination of PTFE, HDPE, LDPE and Pebax; the length of the delivery sheath tube is L, and L is about 600-1200 mm.

[0059] The delivery sheath tube 21 has high hardness, and the distal end will not be deformed when the atrial shunt is loaded, which will increase the resistance of the delivery sheath tube 21 into the human body, or even damage the blood vessel wall.

[0060] The proximal end of the delivery sheath tube 21 is also provided with a sheath tube connector 212, which is connected with the delivery handle 22 through the sheath tube connector 212.

[0061] The delivery handle 22 includes a handle head 221 and a shell 222, the shape of the handle head 221 is similar to a hollow cone, and the bottom of the cone is increased by a semicircular cylinder, and the shape of the shell 222 is similar to a hollow cylinder.

[0062] The upper and lower ends of the handle head 221 are both provided with openings, and the opening at the distal end of the handle head 221 is matched with the diameter of the delivery sheath tube 21; the opening at the proximal end of the handle head 221 is matched with the diameter of the shell 222, so that the delivery sheath tube 21, the handle head 221 and the shell 222 are connected in communication.

[0063] The handle head 221 is sleeved on the proximal end of the delivery sheath tube 21 through the opening. Preferably, a stress protection tube 223 is also provided at the joint of the handle head 221 and the delivery sheath tube 21, the stress protection tube 223 is sleeved on the proximal end of the delivery sheath tube 21, and the handle head 221 is sleeved on the stress protection tube 223, and the stress protection tube 223 is used to increase the connection strength of the handle head 221 and the delivery sheath tube 21. The material of the stress protection tube 223 is nylon 66, and it can also be one or more of other polymer materials. The delivery sheath tube 21, the stress protection tube 223 and the handle head 221 of the embodiment are fixedly connected or integrally formed by means of adhesive, hot melting and the like.

[0064] The shell 222 is a hollow structure, including an upper shell and a lower shell, the distal end of the lower shell is connected with the semicircular cylindrical bottom of the handle head 221, and the upper shell and the lower shell are connected by clamping, threading or the like, and a first guide groove 2221 is arranged at the distal end position of one side of the upper shell and the lower shell, the length of the first guide groove 2221 is slightly greater than the length of the atrial shunt ballast in the delivery sheath tube 21; the distal end of the upper shell is not connected with the conical bottom of the handle head 221, and a radial second guide groove 2222 is arranged near the distal end of the upper shell; a clamping block 224 is arranged at the tail of the shell 222.

[0065] The venting section 23 includes a silicone valve 231, a venting tail section 232, a venting head 233, a venting pipe 234, and a three-way stopcock 235. The venting head 233, the venting tail section 232, and the silicone valve 231 are located inside the handle head 221. The three-way stopcock 235 is connected to the venting head through the venting pipe and is located outside the handle head 221.

[0066] The drain head 233 is hollow funnel-shaped. A stepped hole 2333 is located on the inner side of the proximal end of the drain head 233. The thickness of the silicone valve 231 is not less than the height of the stepped hole 2333 to seal the space between the drain head 233 and the drain tail 232. An opening matching the distal opening of the handle head 221 is provided at the distal end of the drain head 233. An opening is also provided at the proximal end of the drain head 233 to allow communication between the drain head 223 and the handle head 221. The handle head 221 and the drain head 233 are fixedly connected by threaded connection, snap-fit ​​connection, or loop fastening. The drain tail 232 is located at the proximal end of the drain head and is fixedly connected to the drain head 233 by threaded connection, snap-fit ​​connection, or loop fastening.

[0067] The silicone valve 231 is housed inside the venting section 23, preferably positioned between the venting tail and the venting head. A small hole, compatible with the push rod 12, is provided at a corresponding position between the venting tail 232 and the silicone valve 231, facilitating the passage of the push rod 12. An opening, compatible with one end of the venting pipe 234, is provided on one side of the venting head 233 corresponding to the handle head 221, allowing one end of the venting pipe 234 to be inserted into the opening. The other end of the venting pipe 234 is connected to the three-way stopcock 235. In this embodiment, the function of the venting section 23 is to vent internal air.

[0068] External threads are provided on the outer sides of both the distal and proximal ends of the venting head 233 so that the sheath connector 212 is connected to the distal end of the venting head 233 by threads, and the venting tail 232 is connected to the proximal end of the venting head 233 by threads.

[0069] like Figures 9-19 As shown, the control structure 3 includes a control unit 31 and a transmission unit 32, with the control unit 31 and the transmission unit 32 connected together.

[0070] The control unit 31 includes a first control element and a second control element.

[0071] The first control member comprises a first knob 311, a first screw rod 312, and a first threaded cylinder 313. The first knob 311 is arranged outside the proximal end of the shell 222, and can be one of a circular knob, a key-shaped knob, or the like. In other embodiments, the distal end of the first knob 311 can also be provided with a nested connecting rod 314, and the first knob 311 is connected to the inner side wall of the proximal end of the first screw rod 312 through the nested connecting rod 314. Preferably, the outer circumferential surface of the nested connecting rod 314 is provided with threads, and is further screwed with the first screw rod 312. The first screw rod 312 is screw-coupled with the first threaded cylinder 313, and the distal end of the first threaded cylinder 313 is connected with the conducting part 32. The outer side of the first screw rod 312 is provided with threads, and the first screw rod 312 has a hollow structure with open ends. The first threaded cylinder 313 is hollow, and a nut matched with the first screw rod 312 is arranged in the first threaded cylinder 313. The first threaded cylinder 313 moves axially under the action of the rotation of the first screw rod 312, so as to drive the pushing rod 12 to move.

[0072] In other embodiments, the second control member comprises a second knob 321, a second screw rod 322, and a second threaded cylinder 323. The second knob 321 is arranged outside the proximal end of the shell 222, and is specifically arranged on the proximal end side of the first knob 311. The second knob 321 can be one of a circular knob, a key-shaped knob, or the like. The inner side of the second knob 321 is provided with a plurality of reinforcing ribs 324, and the proximal end of the second screw rod 322 is provided with a U-shaped groove 325 matched with the reinforcing ribs. The reinforcing ribs 324 are inserted into the U-shaped groove 325, and the second knob 321 drives the reinforcing ribs 324 to rotate. The second screw rod 322 is screw-coupled with the second threaded cylinder 323, and the distal end of the second threaded cylinder 323 is connected with the conducting part 32. The outer side of the second screw rod 322 is provided with threads, and the second threaded cylinder 323 is provided with a nut matched with the second screw rod 322. The second threaded cylinder 323 moves axially under the action of the rotation of the second screw rod 322, so as to drive the pushing rod 12 to move.

[0073] In the present embodiment, the second knob 321 is further provided with a fixing screw 326, and the rod corresponding to the U-shaped groove 325 is provided with a threaded hole 327 corresponding to the fixing screw 326, so that the fixing screw 326 is inserted into the threaded hole 327.

[0074] The second screw rod 322 has a hollow structure, and the first screw rod 312 is sleeved on the second screw rod 322, so that the second screw rod 322 penetrates through the first screw rod 312, and the second threaded cylinder 323 also penetrates through the distal end of the first screw rod 312.

[0075] The second control member is nested in the first control member, that is, from inside to outside, it is the second screw rod 322, the second threaded cylinder 323, the first screw rod 312, and the first threaded cylinder 313.

[0076] The pitch of the second screw 322 is smaller than the pitch of the first screw 312, so that the second control member can finely and accurately adjust the pusher 12, and the first control member can quickly and roughly (in a large range) adjust the pusher 12.

[0077] An annular boss 3221 is arranged at the proximal end of the second screw 322 near the position connected with the first knob 311, and a first annular groove 316 is arranged at the inner side of the first knob 311 and matched with the annular boss 3221, so that the annular boss 3221 is arranged in the first annular groove 316, but is not locked, that is, the first knob 311 will not drive the second screw 322 to rotate when rotating; the annular boss 3221 is arranged in the embodiment to enable the second screw 322 to rotate in the radial direction and limit the movement of the second screw 322 in the axial direction.

[0078] A second annular groove 315 is arranged on the outer circumferential surface of the first knob 311 and matched with the clamping block 224 of the shell 222, so that the clamping block 224 is arranged in the second annular groove 315; the second annular groove 315 and the clamping block 224 cooperate to facilitate the rotation of the first knob 311 in the radial direction and limit the movement of the first knob 311 in the axial direction.

[0079] An extension pipe 317 is further arranged at the extreme of the first knob 311, and a thread is arranged on the extension pipe 317; a locking ring 318 is further arranged outside the thread, and cooperates with the thread on the extension pipe 317 to lock the first screw 312 in the second knob 321, so as to avoid the axial movement of the first screw 312 and enable the circumferential movement of the first screw 312.

[0080] The conducting part 32 includes a push rod connecting member 331, a first threaded cylinder connecting member 332, and a first connecting rod 333; the push rod connecting member 331 is provided with a through hole for clamping the push rod 12, so that the push rod 12 passes through the push rod connecting member 331; the proximal end of the push rod connecting member 331 is connected with the distal end of the first connecting rod 333, and the proximal end of the first connecting rod 333 is connected with the proximal end of the first threaded cylinder connecting member 332; the connection mode can be cooperation through threads, buckles, etc. Figure 14 As shown in FIG. 5, the proximal end of the first connecting rod 333 is threadedly connected with the first threaded cylinder connecting member 332 through a threaded head end 337; the first threaded cylinder connecting member 332 is arranged in the first threaded cylinder 313 near the distal end; the distal end of the first threaded cylinder 313 is provided with an opening, and the diameter of the opening is greater than the diameter of the first connecting rod 333 and smaller than the diameters of the push rod connecting member 331 and the first threaded cylinder connecting member 332; the distal end of the first threaded cylinder 313 is sleeved on the outer circumferential surface of the first connecting rod 333, so as to drive the axial movement of the push rod connecting member 331 and the first threaded cylinder connecting member 333.

[0081] In other embodiments, the conducting part 32 further comprises a second threaded cylinder connecting piece 334, a second connecting rod 335, the distal end of the second connecting rod 335 is connected with the proximal end of the first threaded cylinder 313, the proximal end of the second connecting rod 335 is connected with the distal end of the second threaded cylinder connecting piece 334, the connection can be through thread, buckle and other ways; the distal end of the second threaded cylinder 323 is provided with an opening, and the diameter of the opening is greater than the diameter of the second connecting rod 335 and less than the diameter of the second threaded cylinder connecting piece 334, the diameter of the second threaded cylinder connecting piece 334 is less than the diameter of the first threaded cylinder connecting piece 332; the distal end of the second threaded cylinder 323 is sleeved on the outer circumferential surface of the second connecting rod 335, which can drive the axial movement of the push rod connecting piece 331 and the second threaded cylinder connecting piece 334.

[0082] In the embodiment, the movement stroke of the first control part is the length of the second connecting rod 335, and the movement stroke of the second control part is the length of the first connecting rod 333.

[0083] The outer circumferential surface of the push rod connecting piece 331 is further provided with a guide 336, and the housing 222 is provided with a first guide groove 2221, and the first threaded cylinder 313 and / or the second threaded cylinder 323 moves without rotation under the guidance of the guide 336 along the first guide groove 2221.

[0084] The distal end of the housing 222 is further provided with a second guide groove 2222, and the guide 336 can move circumferentially along the second guide groove 336, so that the distal end of the push rod 21 is separated from the atrial shunt.

[0085] The use method of the atrial shunt delivery system in the embodiment is as follows:

[0086] First, connect the atrial shunt 4 with the connecting piece 11 outside the body, load the atrial shunt 4 at the distal end of the delivery sheath 21 by rotating the first knob or the second knob, pass the compressed and pretreated atrial shunt 4 and the delivery device through the femoral vein, the superior vena cava, to the right atrium, through the interatrial septum, into the left atrium, and stop advancing the delivery device.

[0087] After adjusting the position of the distal end of the delivery device, rotate the second knob or the first knob, advance the control system to half of the atrial shunt left disc to obtain release, continue to advance the control system to the whole, release the right disc of the atrial shunt 4, rotate the guide radially, separate the atrial shunt 4, retract the delivery device, and take out the delivery structure 2 out of the patient's body, so that the atrial shunt 4 is completely released and fixed on the interatrial septum between the left atrium and the right atrium. During the operation, the atrial shunt can be released quickly or slowly according to the patient's condition, the doctor's proficiency and other factors.

[0088] The atrial shunt is delivered to the atrial septum by the delivery device provided by the embodiment, and then the atrial shunt is used to redistribute the atrial pressure and reduce the atrial pressure of the left and right atria.

[0089] In other embodiments

[0090] The pushing member, the second screw rod, the first knob and the second knob can be provided with through holes, so that the pushing rod passes through, but only the clamping member is tightly connected with the pushing rod.

[0091] As Figure 23 shown, the pushing rod 12 passes through the control structure, and the proximal end of the pushing rod 12 is provided with a release handle 13 for controlling the release of the atrial shunt, that is, the function of releasing the atrial shunt is transferred from the release part to the release handle of the pushing rod, and the pushing rod has the functions of loading, pushing and releasing the atrial shunt.

[0092] In other embodiments, the delivery device is also provided with a shunt catcher, which can be used to help recover the replacement atrial shunt 4, and the catcher adopts a clamping opening mode to capture and fix the atrial shunt 4.

[0093] In other embodiments

[0094] The delivery handle is also provided with marks for marking the release modes of the atrial shunt at different positions, such as marks for no release, release of the left disc, release of the right disc, and dissociation, and this mode reduces unnecessary exposure to DSA radiation, can use ultrasonic operation, and maintains the physical safety of doctors and patients.

[0095] In other embodiments

[0096] As Figure 24 shown, the guide member in the embodiment can be replaced by a rotatingly connected pin to be relatively fixed with the pushing rod or to make the pushing rod freely slide, the pin structure is controlled to control the pushing rod, the design of the second control member is cancelled, and manual control of the pin structure is adopted.

[0097] In other embodiments, the second control member is removed in the embodiment, and only the first control member is used to control the pushing rod, so that the overall structure is simple and convenient to use.

[0098] The delivery device for the atrial shunt provided by the embodiment has rich functions, is simple to operate, and is beneficial to the promotion and application of the delivery device in the field of medical instruments.

[0099] Compared with the prior art, the delivery device of the atrial shunt provided by the application firstly loads the atrial shunt into the distal end of the delivery structure through linkage between the control structure and the loading structure, the distal end of the delivery structure sequentially passes through the right femoral vein, the inferior vena cava, enters the right atrium, and reaches the left atrium by expanding through the interatrial septum. The control structure is rotated to firstly release the left disc of the atrial shunt, the delivery device is withdrawn, the right disc of the atrial shunt is released, then the atrial shunt is released, and the delivery device is withdrawn from the human body.

[0100] The delivery device of the atrial shunt provided by the application integrates the loading, delivery and release functions of the conventional atrial shunt delivery device on one handle, reduces the complexity of the device, is simple to operate, and improves the acceptance speed of the device by doctors. Finally, the control structure is divided into a first control part and a second control part, and the requirements for refinement and saving of operation time in actual operation are flexibly met.

[0101] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. A delivery system for an atrial shunt, characterized by The control structure includes a control part and a transmission part connected with each other, the distal end of the transmission part is connected with the push rod, and the control part is rotated to drive the transmission part to move, so that the transmission part drives the push rod to move along the channel formed by the delivery sheath tube. The control part includes a first screw rod and a first threaded cylinder connected with the first screw rod by screw threads, the distal end of the first threaded cylinder is connected with the transmission part, and the first threaded cylinder moves axially along the first threaded cylinder under the drive of the first screw rod, so as to drive the transmission part to move the push rod. The control part includes a second screw rod and a second threaded cylinder connected with the second screw rod by screw threads, the distal end of the second threaded cylinder is connected with the transmission part, and the second threaded cylinder moves axially along the second threaded cylinder under the drive of the second screw rod, so as to drive the transmission part to move the push rod. The distal end of the delivery sheath tube has a circular table, and the diameter of the distal end of the circular table is smaller than that of the proximal end. The transmission part includes a push rod connecting piece, a first threaded cylinder connecting piece, and a first connecting rod, the distal end of the first connecting rod is connected with the push rod connecting piece, and the proximal end of the first connecting rod is connected with the first threaded cylinder connecting piece. The transmission part further includes a second threaded cylinder connecting piece and a second connecting rod, the distal end of the second connecting rod is connected with the first threaded cylinder connecting piece, and the proximal end of the second connecting rod is connected with the second threaded cylinder connecting piece. A guide piece is arranged on the outer circumferential surface of the push rod connecting piece, and a first guide groove is arranged on the side of the shell close to the distal end and matched with the guide piece, so that the first threaded cylinder and / or the second threaded cylinder move without rotation under the guidance of the guide piece along the first guide groove. The delivery structure further includes a shell, and a second guide groove matched with the guide piece is further arranged on the distal end of the shell, so that the guide piece moves circumferentially along the second guide groove.

2. The delivery system for an atrial shunt of claim 1, wherein, The first screw rod is a hollow structure with open ends, the distal end of the first screw rod is sleeved on the second screw rod, and the pitch of the second screw rod is smaller than that of the first screw rod.

3. The delivery system for an atrial shunt of claim 1, wherein, The control part further includes a first knob connected with the first screw rod through a nested connecting rod.

4. The delivery system for an atrial shunt of claim 2, wherein, An annular boss is arranged on the outer circumferential surface of the second screw rod close to the proximal end, a first groove matched with the annular boss is arranged in the first knob, and the annular boss of the second screw rod is arranged in the first groove.

5. The delivery system for an atrial shunt of claim 3, wherein, The proximal end of the delivery sheath tube is inserted into the distal end of the shell, a clamping block is arranged on the proximal end of the shell, a second groove matched with the clamping block is arranged on the outer periphery of the first knob, and the clamping block is clamped in the second groove.

6. The delivery system for an atrial shunt of claim 2, wherein, The control part further includes a second knob, the inner side of the second knob is provided with a plurality of reinforcing ribs, the proximal end of the second screw rod is provided with a U-shaped groove matched with the reinforcing ribs, and the reinforcing ribs are inserted into the U-shaped groove, so that the second knob drives the reinforcing ribs to rotate.

7. The delivery system for an atrial shunt of claim 5, wherein, The conveying structure further comprises an emptying part, which comprises a silica gel valve, an emptying tail, an emptying head, an emptying pipe and a three-way cock, the emptying tail is fixedly connected with a proximal end of the emptying head, a distal end of the emptying head is fixedly connected with a handle head, and the silica gel valve is arranged inside the emptying part; a through hole, through which one end of the emptying pipe passes, is formed in a corresponding position on one side of the emptying head and the handle head, so that the one end of the emptying pipe is mounted in the through hole, and the other end of the emptying pipe is connected with the three-way cock.

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