CN209734725U - Multipurpose bending-adjustable tearing catheter for cardiac resynchronization therapy - Google Patents

Abstract

The utility model discloses a multipurpose bending-adjustable tearing catheter for heart resynchronization therapy, which is formed by combining two half tubes, wherein the combining part forms a tearing interface, a saccule for plugging coronary sinus orifice is arranged in the middle of the catheter, a detachable connection bending-adjusting operating handle at the near-end tube head of the catheter is used for multi-directionally bending the far end of the catheter, a delivery pipe is obliquely connected on the tube head and is communicated with the inner cavity of the catheter, and the delivery end can deliver contrast medium and can also deliver left ventricular electrode; this a pipe can synthesize the function that realizes traditional coronary sinus mouthful guide wire (or electrophysiology pipe), sacculus radiography pipe and left ventricle electrode transport sheath pipe, can realize once sending into, tears to take out to can multidirectional accent is bent, conveniently seeks and inserts coronary sinus mouthful, and through the improved design to the shutoff sacculus, can avoid the not good defect of sacculus shutoff effect of current sacculus radiography pipe.

Description

Multipurpose bending-adjustable tearing catheter for cardiac resynchronization therapy

Technical Field

The utility model relates to a intracardiac branch of academic or vocational study medical equipment field especially relates to a pacemaker installation auxiliary assembly.

Background

It is well known that Cardiac Resynchronization Therapy (CRT) generally refers to atrioventricular and biventricular pacing therapy for chronic heart failure. The main effects of the device are to correct left and right ventricles or asynchrony in ventricles through biventricular pacing, increase ventricular blood discharge and filling, reduce mitral valve regurgitation and improve ejection fraction. After CRT treatment, the electrode arranged in the left ventricle can excite the most delayed contraction part of the left ventricle in advance according to the setting, usually the left ventricle side wall or the rear side wall, so that the ventricular septum and the left ventricle free wall contract synchronously, the ventricular septum is restored to support the contraction of the left ventricle, the pressure rising rate of the left ventricle is accelerated, the isovolumetric contraction time of the left ventricle is shortened, meanwhile, the filling time of the left ventricle is correspondingly increased, the front load is increased when the left ventricle is filled, and further the myocardial contractility is improved.

In addition, atrioventricular conduction is optimized by programming the AV or PV interval, improving the effect of atrial contraction on left ventricular filling, reducing diastolic mitral regurgitation due to atrioventricular delay, increasing both forward ejection and effective left ventricular ejection fraction.

The most critical of the CRT implantation is the implantation of a left ventricular pacing electrode, and an electrode lead needs to be placed in a coronary sinus of the heart or some branch of other cardiac veins which converge into the coronary sinus, namely a lateral vein, a posterior vein, a great cardiac vein and the like.

In the prior art, the operation process of CRT is generally: 1. feeding a guide wire along the superior vena cava to the inferior vena cava; 2. sending the guide sheath tube to the right atrium along the guide wire to make the front end of the guide sheath tube basically level with the coronary sinus ostium, and withdrawing the guide wire; 3. the guiding catheter or the electrophysiology catheter is properly plastic in vitro, is sent to a searched coronary sinus orifice along a guiding sheath, is inserted into the coronary sinus orifice after the sinus orifice is found, is sent to the coronary sinus orifice by about 1-2cm along the guiding catheter or the electrophysiology catheter, and is withdrawn; 4. feeding the saccule angiography catheter along the guide sheath tube to inflate the saccule, injecting contrast agent to carry out coronary vein angiography, selecting proper target vein vessels such as lateral vein, posterior vein, great cardiac vein and the like according to an angiography result, and then withdrawing the saccule angiography catheter; 5. feeding the left ventricular electrode sheath (tearable sheath) along the guiding sheath, and withdrawing the guiding sheath; 6. and feeding the left ventricular electrode guide wire along the left ventricular electrode sheath, and feeding the left ventricular electrode along the guide wire.

In the above process of the prior art, the following disadvantages exist: 1. the catheters with different functions are repeatedly sent into and withdrawn from the coronary sinus ostium, and comprise a guide tube or an electrophysiology catheter for searching the coronary sinus ostium, a balloon angiography catheter and a left ventricular electrode sheath, the three catheters are all arranged in one tube and one tube, each catheter only realizes one function, the operation difficulty is increased, the operation duration is increased, after all, the operation of sending into and withdrawing from the catheters for multiple times is involved, the risk is increased, and the cost is increased. Separately, firstly, when the guiding tube for searching the coronary sinus ostium is used, the front section of the guiding tube needs to have certain bending, the bending is usually realized by an operator according to experience in vitro and then keeping a proper bending shape after the guiding tube is sent into the body by the resilience force of the guiding tube, but the plastic and the resilience effect of the guiding tube for the function are not ideal, so that the guiding tube not only is easy to cause trauma to a patient, but also is not fast in searching the sinus ostium and has higher requirements on the experience of the operator; therefore, in the clinical practice, many surgeons currently recommend an electrophysiology catheter (such as IBI acquired Fixed dark 1010-6-28-SC Soft) to achieve this function, because the front end of the catheter is easier to bend and easier to find the coronary sinus ostium, but after all this is not a special purpose of the catheter, but "borrows" to achieve the following sinus ostium finding function, so in practice, some electrophysiology catheters are "small and large" and, as mentioned above, even though the electrophysiology catheter is used, the surgeon still needs to perform proper plasticity in vitro, which is very demanding on the experience of the surgeon; secondly, regarding sacculus radiography pipe, have the coronary vein radiography pipe of sacculus among the prior art, the shape of sacculus is mostly spherical or cylindrical, as disclosed chinese utility model patent publication is CN104644157B, have a sacculus in the middle part of the pipe, the sacculus can prevent the contrast medium to flow back to the right atrium after encumbrance, its sacculus is nearly cylindrical, need to be sufficient again after going deep into coronary sinus with the sacculus position, lean on the laminating of sacculus wall and coronary vein inner wall and block blood and contrast medium, the drawback of this kind of sacculus is: or the plugging effect is not good due to insufficient filling, or the tearing of the vessel wall and the sinus ostia is easily caused by filling transition. In addition, the catheter in the prior art is provided with an opening at the head end, so that even if the balloon blocking effect is good, most of the contrast agent is concentrated at the head end of the catheter, and the vein branch developing effect at the far end is still not ideal. Finally, the left ventricular electrode sheath must be a tearable sheath since the last left ventricular electrode is left in the body.

In the prior art, a flexible sheath has been reported, for example, patent application with publication number CN102580225A discloses a flexible sheath, and first, the application of the flexible sheath is mentioned in a general way throughout the patent, and no special application field is mentioned, which is inferred from the description in paragraph [0051] of the specification, and is more suitable for injecting liquid or extracting liquid. In particular, although it has an improved effect in the arrangement of the wire drawing structure and the realization of the adjustable bending with respect to the cited us document, since the sheath tube is not a tearable sheath tube, it cannot be directly used as a delivery sheath tube for the left chamber electrode, and it can be seen from the wire drawing structure that the handle thereof is only suitable for the case of one pull wire, i.e., the adjustable bending of the distal end can be realized only in one direction, which also has a great limitation for the CRT operation, and the handle is provided integrally with the sheath tube, which can be used only once, and the cost is also relatively high.

In view of the foregoing problems with the prior art, there is a need to develop a multipurpose bendable tear-away catheter for use in CRT surgery.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the utility model provides a but heart resynchronization therapy multipurpose bending is adjusted and is torn pipe, this pipe can synthesize the function that realizes coronary sinus mouth guide tube (or electrophysiology pipe), sacculus radiography pipe and left ventricle electrode sheath pipe, can realize once sending into, tears to take out to can multidirectional bending of adjusting, conveniently look for and insert coronary sinus mouth, and through the improved design to the shutoff sacculus, can avoid the not good defect of sacculus shutoff effect of current sacculus radiography pipe.

In order to achieve the above object, the present invention provides a method for manufacturing a semiconductor device.

A multipurpose bending-adjustable tearable catheter for cardiac resynchronization therapy comprises two symmetrically arranged half-pipes with the same structure, wherein the two symmetrically arranged half-pipes are spliced and connected along the axial direction to form the whole catheter, and an interface formed by splicing and connecting is a tearable interface; the semi-pipe comprises a pipe head and a pipe body, the pipe head is semi-cylindrical, the end part of the pipe head extends outwards from the arc surface to form a semi-tubular handle combining part, and the middle part of the handle combining part is provided with a circumferential clamping groove; the bottom surface of the semi-cylinder of the tube head is provided with at least one drawing wire connecting rod socket, and the outside of the socket is connected with a drawing wire connecting rod; the semi-cylindrical surface of the tube head is provided with a balloon air supply interface and a tearing handle, and the middle part of the semi-cylindrical surface of the tube head is obliquely provided with a semi-conveying pipe in an extending manner at the tearing interface; the diameter of the tube body is smaller than that of the tube head, the tube body and the tube head are connected in a smooth transition mode and are integrally formed, a semi-balloon is arranged in the middle of the far end of the tube body and comprises a balloon blocking surface, a balloon bottom surface and a balloon combination interface, and the balloon combination interface is overlapped with the tearable interface to enable the balloon to be filled to form an integral balloon; the middle part of the tube body is provided with a tube cavity, the far end of the tube cavity is provided with a free outlet, and the near end of the tube cavity is connected to the same-diameter tube cavity of the semi-delivery tube through smooth transition to form a delivery passage; an air inlet is arranged on the tube wall of the half balloon and is communicated with an air supply interface on the tube head through an air passage arranged in the half tube wall; the semi-tube further comprises a traction wire, the number of the traction wire corresponds to that of the traction wire connecting rods, the traction wire connecting rods are connected to the tube head at the near end of the traction wire, and the traction wire connecting rods extend to the far end in the tube wall, are connected with the semi-circular anchors arranged near the far end head and can slide relative to the tube wall.

Further, the two half pipes are respectively processed and formed, the thickness of the pipe wall at the tearable interface is the same as that of the pipe wall at other positions, and the half pipes are spliced and connected through glue bonding after being aligned.

Further, the two half pipes are respectively processed and molded, grooves are formed in the pipe walls of the tearable interfaces from the outside to the inside of the pipes, and the two half pipes are connected at the top ends of the grooves through hot welding.

Further, the angle between the delivery pipe and the catheter is 25-45 degrees, preferably 30 degrees.

Furthermore, the catheter also comprises a bending operation handle, and the bending operation handle is connected with the catheter through a handle combination part on the tube head.

Further, the operating handle includes a catheter connection; the catheter connecting part comprises a connecting pipe and a sleeve, and clamping balls are circumferentially arranged at the position, corresponding to the clamping groove of the handle combining part, of the connecting pipe; the diameter of the sleeve is slightly larger than that of the connecting pipe, the sleeve is sleeved with the connecting pipe in a sliding mode, and the clamping ball is driven to be clamped into or separated from the clamping groove in the guide pipe to achieve combination and separation of the sleeve and the connecting pipe.

Furthermore, the operating handle also comprises a traction wire adjusting mechanism, and the traction wire adjusting mechanism comprises a traction wire pulling strip, a traction wire pulling button and a traction wire pulling strip sliding guide rail; when the guide pipe is connected with the operating handle, the traction wire brace is synchronously connected with the traction wire connecting rod and locked; the traction wire brace sliding guide rail is arranged in the operating handle and sleeved outside the front-back movement path of the traction wire brace; the surface of the operating handle is provided with a sliding groove, and the traction wire dragging button is arranged in the sliding groove and can slide along the sliding groove; the lower portion of the drag button is connected with the drag wire brace, so that the drag wire pulls the drag wire brace to move in the drag wire brace guide rail when the drag button slides in the sliding groove, and the drag wire slides back and forth.

Further, the traction wire connecting rod is connected with the traction wire pulling strip through axial inserting clamping, and clamping connection is removed through circumferential rotation.

Furthermore, the operating handle is also provided with a locking switch, and the locking switch is connected with the traction wire brace sliding guide rail and drives the sliding guide rail to slide back and forth and lock; when the guide rail slides forwards, the connection position of the pull wire brace and the pull wire connecting rod is limited in the circumferential direction and cannot be separated; when the guide rail slided backward for the haulage wire brace is relieved with haulage wire connecting rod junction circumference and is injectd, when the rotatory pipe of circumference and drive the haulage wire connecting rod rotation, the haulage wire brace is relieved with the haulage wire connecting rod and is connected.

Furthermore, the sleeve is internally provided with a bulge extending from the middle to the direction of the combining end, the connecting pipe is correspondingly provided with a separation blade, a spring is arranged between the end surface of the bulge and the separation blade, the bulge is provided with a groove for accommodating the clamping ball in the direction of the combining end, which is close to the direction of the combining end, of the clamping ball, an oval slot is arranged in the middle of the outer wall of the sleeve, the end part of the slot is fixedly connected with the connecting pipe through a screw, the structure of the connecting pipe and the sleeve compresses the spring when the sleeve slides relative to the connecting pipe along the axial direction, so that the clamping ball on the connecting pipe slides into the groove arranged on the bulge of the sleeve, the handle combining part of the catheter tube head can be inserted into the catheter connecting part, then after the sleeve is loosened, the whole sleeve is reset under the action of the spring, and, the traction wire connecting rod is connected with the traction wire brace in a clamping manner along the axial direction in an inserting manner, and is circumferentially wrapped and locked by the circumferential traction wire brace guide rail; when the operation is needed to be disengaged, the pull strip and the connecting rod locking switch are firstly removed, the guide rail is backwards slid to enable the connection part of the pull wire pull strip and the pull wire connecting rod to be circumferentially removed and limited, when the guide pipe is circumferentially rotated and the pull wire connecting rod is driven to rotate, the pull wire pull strip and the pull wire connecting rod are removed from connection, and then the guide pipe is pulled out relative to the connecting pipe sliding sleeve to realize the separation of the guide pipe and the operation handle after adjustment.

Further, operating handle is the cylinder tubulose, traction wire brace guide rail is the rectangular channel, the rectangular channel top is connected by the circular arc, the circular arc is pressed close to cylinder tubulose inner wall and both can slide relatively, the locking switch sets up on the circular arc that is close to the handle tail end and extends outside the handle to slide along the slot that sets up on the handle.

Further, the half pipes are respectively a first half pipe and a second half pipe, the number of the traction wires in the first half pipe and the number of the traction wires in the second half pipe are respectively 1, and the connection line of the traction wires and the center of the half pipes and the splicing interface are both 90 degrees; or the number of the traction wires in the first half pipe and the second half pipe is 2 respectively, and the connecting line of the traction wires and the center of the half pipes and the splicing interface form an angle of 45 degrees.

Further, the balloon blocking surface is a conical surface, the bottom surface of the balloon is circular, and the diameter after filling is 14mm +/-1 mm, or the blocking surface is an ellipsoid surface, the bottom surface of the balloon is oval, the diameter after filling is 16.5 +/-1 mm, and the minor diameter is 11.5 +/-1 mm; the length of the balloon is 15.0 +/-0.5 mm.

Further, the outer diameter of the guide pipe is 5-6F. Wherein F is F number, namely French No, 1F is 0.333 mm.

The above technical scheme of the utility model has following advantage:

1. The utility model discloses the function of coronary sinus ostium guiding tube (or electrophysiology pipe), sacculus radiography pipe and left ventricle electrode sheath pipe can be realized comprehensively to a pipe replaces the function of three pipe, once sends into, tears to take out, makes things convenient for the operation to improve operation efficiency and save the cost.

2. the catheter of the utility model can be provided with 2-4 traction wires, realizes multidirectional bending adjustment, and is convenient to find and insert coronary sinus ostia.

3. The utility model discloses the pipe adopts separable design with transfer curved operating handle, transfers curved handle to carry out disposable use or can reuse as required, saves the cost to both separate the back and be convenient for the pipe and tear the operation, and transfer curved handle and pipe linear connection, the traction wire pulls button easy operation, easily controls direction and the angle of transferring the curve.

4. Before the contrast agent is pushed in, the balloon part does not extend into the coronary vein, but the coronary sinus ostium is blocked, and the designed balloon outer wall has gradually larger diameter, so that the balloon is suitable for different sizes of coronary sinus ostia of different patients, better fit blocking is realized, the backflow of the contrast agent is avoided, and the tearing injury to the coronary vein and the coronary sinus ostium is avoided.

5. The size specification of the balloon designed according to the shape and the size of the coronary sinus ostium obtained by the statistical data can meet the use requirements of various patients; the catheter plugging efficiency is high, the effect is good, and the operation is simple; the far-end vein angiography effect is good.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1: a front view and a bend-adjusting schematic view of a catheter and handle combination according to a first embodiment of the catheter of the present invention are shown.

FIG. 2: a top view of a catheter and handle combination according to a first embodiment of the catheter of the present invention is shown.

FIG. 3: a front view and a bend adjustment schematic of a catheter according to a first embodiment of the catheter of the present invention are shown.

FIG. 4: a top view of a first embodiment of a catheter according to the present invention is shown.

FIG. 5: a cross-sectional view B-B in fig. 1 of a first embodiment of a catheter according to the present invention is shown.

FIG. 6: a cross-sectional view a-a in fig. 1 of a first embodiment of a catheter according to the present invention is shown.

FIG. 7: a cross-sectional view corresponding to a-a in fig. 1 of a second embodiment of a catheter according to the invention is shown.

FIG. 8: there is shown a cross-sectional view of a first embodiment of a catheter according to the present invention in connection with a handle.

FIG. 9: a schematic view of a bend adjustment handle according to a first embodiment of the catheter of the present invention is shown.

Wherein the content of the first and second substances,

100. A conduit; 101 and 102, half-pipes; 200. a tearable interface; 210. gluing; 210', welding; 300. a pipe head; 310. a handle coupling portion; 311. clamping the groove; 320. a tow wire connecting rod; 330. a balloon air supply port; 331. a gas circuit; 340. tearing the handle; 350. a delivery pipe; 400. a pipe body; 410. a balloon; 411. a balloon plugging surface; 412. a balloon bottom surface; 413. a balloon faying surface; 420. a lumen; 421. a free outlet; 500. drawing wires; 510. a semicircular anchor; 520. a gap; 600. a bending adjusting operating handle; 610. a connecting pipe; 611. clamping the ball; 620. a sleeve; 621. a protrusion; 622. a spring; 623. a groove; 624. a slot; 625. a screw; 630. a tow wire adjustment mechanism; 631. drawing a wire into a brace; 632. a pull wire drag button; 633. a traction wire brace sliding guide rail; 634. a sliding groove; 640. a locking switch; 700. a reinforcement.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

According to the first embodiment of the present invention, a multipurpose bending-adjustable tearable catheter for cardiac resynchronization therapy is disclosed, as shown in fig. 1-4 (for the sake of clarity and convenience, the proportions of the components in the drawings may not be in accordance with the actual conditions, especially the wall thickness and the lengths of the parts, etc., and thus the description is given), the catheter 100 comprises two half-tubes 101, 102 with the same structure and symmetrically arranged, the two half-tubes 101, 102 with the symmetrically arranged are spliced and connected in the axial direction to form the whole catheter 100, and the interface formed by the spliced connection is a tearable interface 200; the half pipes 101 and 102 comprise a pipe head 300 and a pipe body 400 (since the two half pipes 101 and 102 have the same structure, the following description will be given by using a structure of one half pipe), the pipe head 300 is semi-cylindrical, the end part of the pipe head extends outwards from the arc surface to form a semi-tubular handle combining part 310, and the middle part of the handle combining part is provided with a circumferential clamping groove 311; the semi-cylindrical bottom surface of the pipe head 300 is provided with at least one drawing wire connecting rod 320 socket (not shown), and the drawing wire connecting rod 320 is connected to the outside of the socket; a balloon air supply interface 330 and a tearing handle 340 are arranged on the semi-cylindrical surface of the tube head 300, a semi-delivery pipe 350 is obliquely and extendedly arranged at the tearable interface 200 in the middle of the semi-cylindrical surface of the tube head 300, and the included angle between the delivery pipe and the catheter is 30 degrees; the diameter of the tube body 400 is smaller than that of the tube head 300, the tube head and the tube head are connected in a smooth transition mode and are integrally formed, a half balloon 410 is arranged in the middle of the far end of the tube body 400, the half balloon 410 comprises a balloon blocking surface 411, a balloon bottom surface 412 and a balloon combination interface 413, and the balloon combination interface 413 is overlapped with the tearable interface 200 to enable the balloon to form an integral balloon after being inflated; the middle part of the tube body 400 is provided with a lumen 420, the distal end of the lumen 420 is provided with a free outlet 421, and the proximal end is connected to the same-diameter lumen of the half-delivery tube 350 through a smooth transition to form a delivery passage, see fig. 2; an air inlet (not shown) is arranged on the tube wall of the half balloon and is communicated with an air supply interface 330 on the tube head through an air path 331 arranged in the half tube wall; the half-tube further comprises a pull wire 500, the number of the pull wire 500 corresponds to the number of the pull wire connecting rods 320, the pull wire 500 is connected to the pull wire connecting rods 320 on the tube head 300 at the proximal end, and after extending to the distal end in the tube wall, the pull wire 500 is connected to a semicircular anchor 510 arranged near the distal end and has a gap 520 with the tube wall, so that the pull wire 500 can slide relatively to the tube wall, as shown in fig. 3.

In this embodiment, as shown in fig. 4, the two half-tubes 101 and 102 are each formed by molding, and the thickness of the tube wall at the tearable interface 200 is the same as that at the other positions, and after alignment, they are joined by an adhesive bond 210. The adhesive bond has a bond strength that allows the catheter to resist contrast-induced tubing pressure during contrast media advancement and tubing pressure during left ventricular electrode delivery, while having a strength value that facilitates manual tearing during the tearing operation.

Alternatively, as shown in fig. 5, in another embodiment, the two half pipes 101 and 102 are respectively formed, and both pipe walls form a bevel from the outside to the inside at the tearable interface 200, and the two half pipes are connected at the top end of the bevel by thermal welding 210'. As before, the strength of the thermal weld enables the catheter to resist tubing pressure caused by contrast media as it is pushed and tubing pressure caused by left ventricular electrode delivery, while the strength value facilitates manual tearing when the tear is performed.

In this embodiment, as shown in fig. 6 and 7, the catheter 100 further includes a bending control handle 600, and the bending control handle 600 is connected to the catheter 100 through the handle combining portion 310 of the tip 300. The operating handle 600 includes a catheter connection part; the catheter connecting part comprises a connecting pipe 610 and a sleeve 620, and clamping balls 611 are circumferentially arranged at the connecting pipe 610 corresponding to the clamping groove 311 of the handle combining part 310; the diameter of the sleeve 620 is slightly larger than that of the connecting pipe 610, the sleeve 620 is sleeved with the connecting pipe 610 in a sliding mode, and the clamping ball 611 is driven to be clamped into or separated from the clamping groove 311 on the conduit to achieve combination and separation of the two. The operating handle 600 further comprises a pull wire adjusting mechanism 630, wherein the pull wire adjusting mechanism 630 comprises a pull wire brace 631, a pull wire drag button 632 and a pull wire brace sliding guide rail 633; when the catheter 100 is connected with the operating handle 600, the traction wire pulling bar 631 is synchronously connected and locked with the traction wire connecting rod 320; the traction wire brace sliding guide rail 633 is arranged in the operating handle 600 and is sleeved outside the front-back movement path of the traction wire brace 631; the surface of the operating handle 600 is provided with a sliding groove 634, and the pull wire dragging button 632 is arranged in the sliding groove 634 and can slide along the sliding groove 634; the lower part of the drag button 632 is connected with the pull wire brace 631, so that the pull wire drag button 632 drives the pull wire brace 631 to move in the pull wire brace guide rail 633 when sliding in the sliding groove 634, and further pulls the pull wire 500 to slide back and forth. The bending operation of the front end of the catheter in different directions is realized by pulling different traction wires, as shown by the dotted lines in fig. 1.

Further, the sleeve 620 is provided with a protrusion 621 extending from the middle to the direction of the joint end, the connecting pipe is correspondingly provided with a blocking piece 612, a spring 622 is arranged between the end surface of the protrusion and the blocking piece, the protrusion is provided with a groove 623 for accommodating the clamping ball in the direction of the joint end, which is close to the direction of the joint end, of the clamping ball, the middle of the outer wall of the sleeve is provided with an oval slot 624, the end of the slot 624 is fixedly connected with the connecting pipe 610 through a screw 625, the structure of the connecting pipe 610 and the sleeve 620 enables the clamping ball 611 on the connecting pipe 610 to slide into the groove 623 arranged on the protrusion of the sleeve when the sleeve slides relative to the connecting pipe along the axial direction, so that the handle joint part of the pipe head of the catheter 100 can be inserted into the catheter connecting part, then the sleeve is reset integrally under the action of the spring after the sleeve is loosened, and the clamping ball is pressed, therefore, the two are clamped and connected, and the traction wire connecting rod 320 is axially inserted and connected with the traction wire brace 631 in a clamping way and is circumferentially wrapped and locked by the circumferential traction wire brace guide rail; when the operation is needed to be disengaged, the pull strip and the connecting rod locking switch are firstly removed, the guide rail is backwards slid to enable the connection part of the pull wire pull strip and the pull wire connecting rod to be circumferentially removed and limited, when the guide pipe is circumferentially rotated and the pull wire connecting rod is driven to rotate, the pull wire pull strip and the pull wire connecting rod are removed from connection, and then the guide pipe is pulled out relative to the connecting pipe sliding sleeve to realize the separation of the guide pipe and the operation handle after adjustment.

In this embodiment, the tow wire connecting rod 320 is connected with the tow wire pulling strip 631 through an axial insertion clamping connection, and the clamping connection is released through circumferential rotation. Specifically, the operating handle is further provided with a locking switch 640, and the locking switch 640 is connected with a traction wire brace sliding guide rail 633 and drives the sliding guide rail 633 to slide back and forth and lock; when the guide rail 633 slides forward, the connection of the traction wire pulling strip 631 and the traction wire connecting rod 320 is limited in the circumferential direction and cannot be disconnected; when the guide rail 633 slides backwards, the connection part of the traction wire brace 631 and the traction wire connecting rod 320 is circumferentially released from the limit, and when the guide rail is circumferentially rotated to drive the traction wire connecting rod 320 to rotate, the traction wire brace 631 and the traction wire connecting rod 320 are released from the connection. Further, operating handle is the cylinder tubulose, traction wire brace guide rail is the rectangular channel, the rectangular channel top is connected by the circular arc, the circular arc is pressed close to cylinder tubulose inner wall and both can slide relatively, the locking switch sets up on the circular arc that is close to the handle tail end and extends outside the handle to slide along the slot that sets up on the handle.

In this embodiment, the half pipes 101 and 102 are a first half pipe and a second half pipe respectively, the number of the traction wires in the first half pipe and the second half pipe is 1, and the connection line between the traction wires and the center of the half pipes and the splicing interface are both 90 degrees; in another embodiment, the number of the traction wires in the first half pipe and the second half pipe is 2 respectively, and the connection line between the traction wires and the center of the half pipe and the splicing interface are 45 degrees, and of course, 3 or other numbers of traction wires can be arranged according to the requirement to realize more choices of bending directions.

According to the report of the applied anatomy of the coronary sinus and its ostium (Chenli et al, proceedings of the medical college of Chuanbei province of medical sciences, Vol.23, No. 2, 4 months 2008), and in combination with clinical practice, the adult coronary sinus ostium has an elliptical aspect ratio of 77.78%, a circular aspect ratio of 22.23%, an elliptical aspect ratio of 11.65 + -3.21 mm, a longitudinal aspect ratio of 6.39 + -1.95 mm, and a circular coronary sinus ostium diameter of 9.41 + -1.85 mm. Therefore, in this embodiment, the bottom surface 412 of the balloon is elliptical, and the major diameter of the inflated ellipse is 16.5mm, and the minor diameter is 11.5 mm; in other embodiments, when the base surface is circular 412, the inflated circle has a diameter of 14 mmmm; in any specification, the length (i.e. the height of the cone or ellipsoid) of the balloon is 15.0mm, and an operator of the balloon can judge the sinus ostium shape of a patient by combining other clinical means and then select the sinus ostium shape according to the requirement.

In this embodiment, the outer diameter of the catheter is 6F. Wherein F is F number, namely French No, 1F is 0.333 mm. Other gauge outer diameters, such as 5F or 5.5F, may also be selected as desired.

In this embodiment, the catheter material may be polyurethane material, and the balloon may be latex or silicone material. As shown in fig. 3-5, the material of the tube wall also has reinforcements 700 therein, which may be braided from wire, distributed in the two tube halves, without reinforcements 700 at the tearable interface. The conduit material can also be made of the reinforcement 700 as a boundary, the inner layer and the outer layer are made of different materials, wherein the inner layer can be made of polytetrafluoroethylene materials, the outer layer is made of nylon or polyether-polyamide block copolymer and the like, during processing, the reinforcement 700 (such as a metal wire mesh) is wrapped and clamped between the inner layer and the outer layer in a melting mode, when the tearable boundary in the form of a groove is adopted, only the inner layer material is subjected to hot melting connection, and the outer layer material completely forms the groove. The bending adjusting handle can be made of medical thermosetting plastics and assembled, such as PVC, PS and the like.

Briefly describing the operation of the utility model when in use, the catheter of the utility model is connected with the operation handle in advance according to the above mode before operation, then the operations such as disinfection, puncture and the like are carried out according to the routine, then the guide wire is sent in along the superior vena cava, then the catheter of the utility model is sent in along the guide wire to the right atrium, the catheter is stopped after reaching the position which is level with the coronary sinus ostium, the guide wire is withdrawn, the traction wire dragging button on the bending adjusting handle is operated to bend the front end of the catheter to search the coronary sinus ostium, the catheter is inserted after the coronary sinus ostium is found and the traction wire dragging button is returned, the operation is stopped when the balloon reaches the coronary sinus ostium, then supplies air to the saccule through two air receiving ports to enable the saccule to be full, an air one-way valve is arranged in the air receiving port, the inflated gas can not return, and the plugging surface of the balloon is attached to the coronary sinus ostium of the coronary vein under the filling state of the balloon, so that the coronary sinus ostium is plugged. The contrast agent is pushed into the conveying pipe and flows out from the free end after being conveyed through the pipe cavity, the conveying one-way valve is arranged in the pipe cavity, the contrast agent can only flow forwards but can not flow back, so that the contrast agent is uniformly distributed in each vein branch at the near end and the far end of the coronary vein, a proper target blood vessel is selected, and after the contrast is finished, the gas one-way valve on the gas receiving port is pushed inwards to discharge the air in the balloon. And feeding the left ventricular electrode with the guide wire along the conveying pipe, and stopping after reaching the preset position of the target blood vessel. Then according to aforementioned operation separation bend adjusting operating handle and pipe, bend adjusting operating handle can remain used repeatedly, and the art person will through tearing the handle the utility model discloses the pipe is torn to withdraw from and is abandoned. The operation steps which are not mentioned above are all carried out according to the conventional operation. In addition, the non-mentioned one-way valve, check valve, hemostatic parts and the like in the catheter of the utility model are all designed conventionally

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The multipurpose bending-adjustable tearable catheter for cardiac resynchronization therapy is characterized by comprising two half pipes which are identical in structure and symmetrically arranged, wherein the two symmetrically arranged half pipes are spliced and connected in the axial direction to form the whole catheter, and an interface formed by splicing and connecting is a tearable interface; the semi-pipe comprises a pipe head and a pipe body, the pipe head is semi-cylindrical, the end part of the pipe head extends outwards from the arc surface to form a semi-tubular handle combining part, and the middle part of the handle combining part is provided with a circumferential clamping groove; the bottom surface of the semi-cylinder of the tube head is provided with at least one drawing wire connecting rod socket, and the outside of the socket is connected with a drawing wire connecting rod; the semi-cylindrical surface of the tube head is provided with a balloon air supply interface and a tearing handle, and the middle part of the semi-cylindrical surface of the tube head is obliquely provided with a semi-conveying pipe in an extending manner at the tearing interface; the diameter of the tube body is smaller than that of the tube head, the tube body and the tube head are connected in a smooth transition mode and are integrally formed, a semi-balloon is arranged in the middle of the far end of the tube body and comprises a balloon blocking surface, a balloon bottom surface and a balloon combination interface, and the balloon combination interface is overlapped with the tearable interface to enable the balloon to be filled to form an integral balloon; the middle part of the tube body is provided with a tube cavity, the far end of the tube cavity is provided with a free outlet, and the near end of the tube cavity is connected to the same-diameter tube cavity of the semi-delivery tube through smooth transition to form a delivery passage; an air inlet is arranged on the tube wall of the half balloon and is communicated with an air supply interface on the tube head through an air passage arranged in the half tube wall; the semi-tube further comprises a traction wire, the traction wire corresponds to the traction wire connecting rods in quantity, the traction wire connecting rods are arranged on the near-end connector heads of the traction wire, and the traction wire is fixedly connected with the semi-circular anchors arranged near the far-end ends after extending to the far ends in the tube wall and can slide relative to the tube wall.

2. The multipurpose bendable tear-away catheter for cardiac resynchronization therapy according to claim 1, wherein the two half-tubes are formed separately, have the same wall thickness as the rest of the tube at the tear-away interface, and are joined together by gluing after alignment; or the two half pipes are respectively processed and molded, grooves from the outer wall of the pipe to the inner wall of the pipe are formed on the pipe wall of the tearable interface, and the two half pipes are connected at the top ends of the grooves through hot welding.

3. the multipurpose adjustable curved tearable catheter for cardiac resynchronization therapy according to claim 1, wherein the angle between the delivery tube and the catheter is between 25 ° and 45 °.

4. The multipurpose bend-adjustable tearable catheter for cardiac resynchronization therapy according to claim 1, wherein the catheter further comprises a bend-adjusting operation handle connected to the handle joining portion of the tube head, the operation handle comprising a catheter connecting portion; the catheter connecting part comprises a connecting pipe and a sleeve, and clamping balls are circumferentially arranged at the position, corresponding to the clamping groove of the handle combining part, of the connecting pipe; the sleeve pipe diameter slightly is greater than the connecting pipe diameter, the sleeve pipe cup joints with the connecting pipe slip, and drive joint ball card is gone into or is separated the joint recess of handle joint portion in order to realize the combination and the separation of the two.

5. The multipurpose curve-adjustable tearable catheter for cardiac resynchronization therapy according to claim 4, wherein the operating handle further comprises a pull wire adjustment mechanism, the pull wire adjustment mechanism comprising a pull wire pull strip, a pull wire pull button, and a pull wire pull strip slide track; when the guide pipe is connected with the operating handle, the traction wire brace is synchronously connected with the traction wire connecting rod and locked; the traction wire brace sliding guide rail is arranged in the operating handle and sleeved outside the front-back movement path of the traction wire brace; the surface of the operating handle is provided with a sliding groove, and the traction wire dragging button is arranged in the sliding groove and can slide along the sliding groove; the lower portion of the drag button is connected with the drag wire brace, so that the drag wire pulls the drag wire brace to move in the drag wire brace sliding guide rail when the drag button slides in the sliding groove, and the drag wire slides back and forth.

6. the multipurpose adjustable curve tearable catheter for cardiac resynchronization therapy according to claim 4 or 5, wherein the pull wire connection rod and the pull wire pulling strip are axially connected by plug-in connection and are circumferentially rotated to release the snap-in connection.

7. The multipurpose adjustable curve tearable catheter for cardiac resynchronization therapy according to claim 5, wherein the operating handle is further provided with a locking switch, the locking switch is connected with the pull wire brace sliding guide rail and drives the sliding guide rail to slide back and forth and lock; when the guide rail slides forwards, the connection position of the pull wire brace and the pull wire connecting rod is limited in the circumferential direction and cannot be separated; when the guide rail slided backward for the haulage wire brace is relieved with haulage wire connecting rod junction circumference and is injectd, when the rotatory pipe of circumference and drive the haulage wire connecting rod rotation, the haulage wire brace is relieved with the haulage wire connecting rod and is connected.

8. The multipurpose bendable tear-off catheter for cardiac resynchronization therapy according to claim 7, wherein the operating handle is cylindrical tube-shaped, the pull wire pull strip sliding guide is a rectangular groove, the tops of the rectangular grooves are connected by an arc, the arc is close to the inner wall of the cylindrical tube and can slide relative to the inner wall of the cylindrical tube, and the locking switch is disposed on the arc near the tail end of the handle and extends out of the handle and slides along a narrow slot disposed on the handle.

9. The multipurpose bendable tear-open catheter for cardiac resynchronization therapy according to claim 7 or 8, wherein the half-tubes are a first half-tube and a second half-tube, the number of the pull wires in the first half-tube and the second half-tube is 1, and the plane formed by the 2 pull wires and the center line of the half-tubes and the splicing interface are both 90 degrees; or the number of the traction wires in the first half pipe and the number of the traction wires in the second half pipe are respectively 2, and the angles between the planes formed by the 4 traction wires and the center lines of the half pipes and the splicing interfaces are 45 degrees.

10. The multipurpose bendable tear-open catheter for cardiac resynchronization therapy according to claim 7 or 8, wherein the balloon occlusion surface is conical and the balloon bottom surface is circular and the inflated diameter is 14mm ± 1mm, or the occlusion surface is ellipsoidal and the balloon bottom surface is elliptical and the inflated diameter is 16.5 ± 1mm and the minor diameter is 11.5 ± 1 mm; the length of the balloon is 15.0 +/-0.5 mm; the outer diameter of the conduit is 5-6F.