CN217661115U

CN217661115U - Ventricular connection mechanism and ventricular assist device

Info

Publication number: CN217661115U
Application number: CN202221337934.0U
Authority: CN
Inventors: 谢端卿; 余顺周
Original assignee: Shenzhen Core Medical Technology Co Ltd
Current assignee: Shenzhen Core Medical Technology Co Ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-10-28
Anticipated expiration: 2032-05-31

Abstract

The utility model relates to a ventricle connecting mechanism and a ventricle auxiliary device, the ventricle connecting mechanism comprises a clamping component and a locking component, the clamping component comprises a first clamping section and a second clamping section, the first clamping section and the second clamping section enclose a clamping hole, the first clamping section comprises a first end and a second end which are opposite, the first end is connected with the second clamping section, the second end is separated from the second clamping section, and the distance between the inner surface of the first clamping section and the central axis of the clamping hole is gradually increased along the first end to the second end; the locking assembly is connected to the clamping assembly to drive the second end to move towards the second clamping section. So can rationally increase the partial internal diameter in centre gripping hole for the blood pump make full use of the space of the great part of centre gripping hole internal diameter reduces the inlet tube of blood pump and at the interference of the in-process of planting, ensures that the blood pump cooperates with the centre gripping hole fast, improves the convenience of ventricle coupling mechanism to the blood pump centre gripping in operation process.

Description

Ventricular connection mechanism and ventricular assist device

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a ventricle coupling mechanism and ventricle auxiliary device.

Background

In blood pump implantation procedures, it is often necessary to fixedly mount a blood pump on biological tissue using a ventricular connection mechanism. However, the conventional ventricular connection mechanism is complicated to operate, and inconvenience is brought to the installation of the blood pump in the use process.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple operation's ventricular coupling mechanism and ventricular assist device.

The embodiment of the utility model provides an above-mentioned purpose is realized through following technical scheme.

In a first aspect, the present invention provides a ventricular connection mechanism, comprising:

the clamping assembly comprises a first clamping section and a second clamping section, the first clamping section and the second clamping section enclose a clamping hole capable of clamping an inlet pipe of a blood pump, the first clamping section comprises a first end and a second end which are opposite, the first end is connected with the second clamping section, the second end is spaced from the second clamping section, and the distance between the inner surface of the first clamping section and the central axis of the clamping hole is gradually increased from the first end to the second end; and

and the locking assembly is connected to the clamping assembly so as to drive the second end to move towards the second clamping section.

In one embodiment, the first clamping segment includes a clamping member and a support member, the clamping member and the support member are both connected to the second clamping segment, and the support member partially surrounds the clamping member and is spaced from the clamping member to form a fracture groove.

In one embodiment, the second clamping segment includes opposing third and fourth ends, the third end connected to the first end, the fourth end spaced from the second end, and the distance between the inner surface of the second clamping segment and the central axis of the clamping bore is constant along the third end to the fourth end.

In one embodiment, the length of the first clamping section is less than or equal to the length of the second clamping section.

In one embodiment, the clamping assembly further includes a first connecting arm and a second connecting arm, the first connecting arm is connected to the second end, the second connecting arm is connected to the second clamping section, a gap is formed between the first connecting arm and the second connecting arm at an interval, the gap is communicated with the clamping hole, and the locking assembly is connected to the first connecting arm and the second connecting arm to adjust the size of the gap.

In one embodiment, the locking assembly comprises a locking member and a connecting member, the connecting member is connected with the second connecting arm, the locking member is rotatably connected with the connecting member and can abut against the first connecting arm, and the locking member is detachably connected with the second connecting arm.

In one embodiment, the locking member includes a cam portion, the cam portion can abut against the first connecting arm, a slot is formed on the inner side of the cam portion, and the first connecting arm includes a protrusion for engaging with the slot.

In one embodiment, the connecting piece comprises a limiting boss, the limiting boss is positioned at one end far away from the second connecting arm, and the limiting boss is arranged on a rotating path of the locking piece.

In one embodiment, the first clamping section and the second clamping section are respectively provided with a plurality of suture holes, the suture holes are arranged around the clamping holes, the clamping assembly is further provided with a plurality of positioning marks, the number of the positioning marks is less than that of the suture holes, and each positioning mark corresponds to one of the suture holes.

In a second aspect, the present invention further provides a ventricular assist device, which comprises a blood pump and any one of the above ventricular connection mechanisms, wherein the blood pump comprises an inlet tube, and the inlet tube can be inserted into the clamping hole.

Compared with the prior art, the utility model provides a ventricle coupling mechanism includes centre gripping subassembly and locking Assembly, the centre gripping subassembly includes first grip segment and second grip segment, first grip segment and second grip segment enclose into the centre gripping hole, first grip segment includes relative first end and second end, first end is connected with the second grip segment, second end and second grip segment interval, first end to second end along first grip segment, the internal surface of first grip segment increases to the distance of the axis of centre gripping hole, so can rationally increase the part internal diameter of centre gripping hole, reduce the interference of the inlet tube of blood pump at the in-process of planting, ensure blood pump fast and centre gripping hole cooperation, improve the convenience of blood pump centre gripping of ventricle coupling mechanism and ventricle auxiliary device in the operation process.

Drawings

Fig. 1 is a perspective view of a ventricular connection mechanism provided by the present invention in a locked state.

Fig. 2 is a top view of the ventricular connection mechanism shown in fig. 1.

Fig. 3 is a partial enlarged view of fig. 2 at E.

Fig. 4 is an exploded view of the ventricular connection mechanism shown in fig. 1.

Fig. 5 is a top view of the ventricular connection mechanism shown in fig. 1 in an unlocked state.

Fig. 6 is a partially enlarged view of F in fig. 5.

Fig. 7 is a partial plan sectional view of the ventricular connection mechanism shown in fig. 1.

Fig. 8 is a partial enlarged view at G in fig. 7.

Fig. 9 is a top view of a clamping assembly of the ventricular connection mechanism shown in fig. 1.

Fig. 10 is a perspective view of a retaining member of the ventricular attachment mechanism shown in fig. 1.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are illustrated in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "inner", "outer", "left", "right" and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

The inventor of this application discovers, the internal surface of traditional ventricle coupling mechanism's centre gripping subassembly is the face of cylinder, promptly, along the circumference of internal surface, and the distance of internal surface to the axis of centre gripping hole equals, so will make columniform blood pump's inlet tube be difficult to insert the centre gripping hole, promptly, the blood pump need many times just can cooperate with ventricle coupling mechanism, and the operation is comparatively loaded down with trivial details, can bring a great deal of inconvenience for the installation of blood pump in the use.

In order to improve at least some above-mentioned problems, the application provides a ventricle coupling mechanism, along first end to second end, the distance of the internal surface of first grip segment and the axis of centre gripping hole increases gradually, so can rationally increase the partial internal diameter of centre gripping hole for the inlet tube make full use of the space of the great part of centre gripping hole internal diameter, reduce the interference of inlet tube in the in-process of inserting, ensure that the inlet tube cooperates with the centre gripping hole fast, improve the convenience of ventricle coupling mechanism to the inlet tube centre gripping in the operation process. The ventricular connection mechanism and the ventricular assist device provided by the present application are described in detail below with reference to the detailed description and the accompanying drawings.

Referring to fig. 1, 2 and 3, a ventricular connection mechanism 10 according to an embodiment of the present invention includes a clamping assembly 20 and a locking assembly 30, wherein the clamping assembly 20 is used for clamping an inlet tube of a blood pump, the clamping assembly 20 includes a first clamping section 130 and a second clamping section 140, the first clamping section 130 and the second clamping section 140 enclose a clamping hole 110, the first clamping section 130 includes a first end 101 and a second end 102 opposite to each other, the first end 101 is connected to the second clamping section 140, the second end 102 is spaced from the second clamping section 140, and a distance between an inner surface of the first clamping section 130 and a central axis 116 of the clamping hole 110 gradually increases along the first end 101 to the second end 102. The locking assembly 30 is used for locking the clamping assembly 20, and the locking assembly 30 is connected to the clamping assembly 20 to move the second end 102 toward the second clamping section 140, so as to lock the clamping assembly 20 to maintain the clamping state of the clamping assembly 20 on the inlet tube of the blood pump.

In some embodiments, the clamping assembly 20 comprises a split ring 100, a first connecting arm 210 and a second connecting arm 220, wherein the split ring 100 is an open ring structure with a gap in the circumferential direction for clamping the inlet tube of the blood pump, the gap is defined as a first gap 120, and the first connecting arm 210 and the second connecting arm 220 are both connected to the split ring 100 and both extend in the radial direction of the split ring 100.

The open ring 100 encloses a clamping hole 110, and the clamping hole 110 communicates with the first slit 120. The split ring 100 has a central axis 160, and the outer circumferential surface 150 of the split ring 100 is a cylindrical surface, which central axis can be understood as the central axis 160 of the entire split ring 100. Because the split ring 100 surrounds the clamping hole 110, the central axis 160 of the split ring 100 can be understood to be the central axis 160 of the clamping hole 110.

Split ring 100 includes first and second

arcuate clamping segments

130, 140, and first and

second clamping segments

130, 140 may be integrally provided, with a gap between the ends of first and

second clamping segments

130, 140 forming first gap 120. The first clamping section 130 can elastically deform relative to the second clamping section 140 to move, and when the first clamping section 130 moves close to the second clamping section 140 to reduce the width of the first gap 120 to a certain value, the inlet tube of the blood pump is in interference fit with the clamping hole 110, that is, the blood pump is clamped by the split ring 100; when the first clamping section 130 moves away from the second clamping section 140 to increase the width of the first slit 120 to a certain value, the aperture of the clamping hole 110 is larger than the outer diameter of the inlet tube of the blood pump, i.e., the blood pump can be separated from the split ring 100.

The first clamping section 130 has a first arc surface 131, the first arc surface 131 is an inner surface of the first clamping section 130, the first arc surface 131 defines a partial boundary of the clamping hole 110, the first clamping section 130 includes a first end 101 and a second end 102 opposite to the first end 101, wherein the first end 101 is fixedly connected to the second clamping section 140, and the second end 102 is spaced apart from the second clamping section 140 and forms the first gap 120. First arc 131 is the BC arc in fig. 2, with first end 101 at point B and second end 102 at point C. From the first end 101 to the second end 102, i.e., from point B to point C, the distance H of the first arc 131 from the central axis 160 of the clamping hole 110 gradually increases such that the cross section of the first arc 131 resembles an involute curve. So can rationally increase the partial internal diameter of centre gripping hole 110 for the inlet tube make full use of the great part space of centre gripping hole 110 internal diameter reduces the inlet tube and at the interference of the in-process of inserting, ensures that the inlet tube cooperates with centre gripping hole 110 fast, improves the convenience of split ring 100 and ventricle coupling mechanism 10 to the inlet tube centre gripping of blood pump in the operation process.

In some embodiments, first clamping segment 130 includes clamping members 134 and support members 133, clamping members 134 and support members 133 being radially spaced along split ring 100 and both connected to second clamping segment 140. A clamping member 134 and a support member 133, wherein the support member 133 partially surrounds the clamping member 134, i.e., the support member 133 is radially further from the central axis 160 of the split ring 100 than the clamping member 134, and the support member 133 is spaced apart from the clamping member 134 to form the fracture groove 132. By providing the breaking groove 132, the clamp 134 is more easily elastically deformed to move relative to both the support 133 and the second clamp segment 140. In case the clamp 134 is moved close to the second clamping section 140, the clamp 134 will be moved away from the support 133 such that the width of the first slit 120 decreases and the width of the breaking groove 132 increases, when the width of the first slit 120 decreases to a certain value, the clamp 134 will clamp the inlet tube of the blood pump. In case the clamping member 134 is moved away from the second clamping section 140, the clamping member 134 will move closer to the support member 133, so that the width of the first slit 120 increases and the width of the breaking groove 132 decreases, and when the width of the first slit 120 increases to a certain value, the aperture of the clamping hole 110 will be larger than the outer diameter of the inlet tube, and the blood pump can be separated from the ventricular connection mechanism 10.

Referring to fig. 2 and 3, in some embodiments, the second clamping section 140 has a second curved surface 142, the second curved surface 142 may actually be understood as an inner surface of the second clamping section 140, the second curved surface 142 defines a portion of the boundary of the clamping aperture 110, the second clamping section 140 includes opposing third and

fourth ends

103 and 104, the third end 103 is connected to the first end 101, and the fourth end 104 is spaced from the second end 102 and forms the first gap 120. The second arc 142 is an AB arc in fig. 2, the third end 103 is located at point B, and the fourth end 104 is located at point a. The distance L from the second arc surface 142 to the central axis 160 of the clamping hole 110 is constant along the third end 103 to the fourth end 104, i.e. from the point B to the point a, i.e. the distance L is a constant value. In other embodiments, the distance L from the second arc 142 to the central axis 160 of the split ring 100 along the third end 103 to the fourth end 104 may also vary, for example, the distance L from the second arc 142 to the central axis 160 of the split ring 100 may also gradually increase to further increase the inner diameter of the clamping hole 110, further reduce interference of the inlet tube during insertion, and improve the ease of clamping the inlet tube during operation of the ventricular connection mechanism 10.

In some embodiments, the length of the first clamping section 130 is less than or equal to the length of the second clamping section 140, so that on the one hand, the structural strength of the entire split ring 100 can be ensured, and on the other hand, a certain elasticity of the clamping piece 134 can be ensured, so that the clamping piece 134 can move close to the second clamping section 140, and the width of the first slit 120 is reduced, so that the clamping piece 134 can reliably clamp the inlet pipe.

In some embodiments, the first connecting arm 210 and the second connecting arm 220 each extend in a radial direction of the split ring 100, the first connecting arm 210 being connected to the second end 102, and the second connecting arm 220 being connected to the second clamping section 140. The first and

second connection arms

210 and 220 are spaced apart from each other to form a gap, which is referred to as a second gap 230, and the second gap 230 and the first gap 120 communicate with each other, and the widths of the first and

second gaps

120 and 230 may be equal to each other when no external force is applied to the holder 134. The split ring 100, the first connecting arm 210 and the second connecting arm 220 may be formed integrally.

Referring to fig. 4, 5 and 6, the locking assembly 30 is connected to the clamping assembly 20 to move the second end 102 toward the second clamping section 140, for example, the locking assembly 30 is connected to the first connecting arm 210 and the second connecting arm 220 to adjust the size of the gap (the second gap 230).

In some embodiments, the locking assembly 30 comprises a locking member 310 and a connecting member 320, the connecting member 320 is connected with the second connecting arm 220, the locking member 310 is rotatably connected with the connecting member 320 and can abut against the first connecting arm 210, and the locking member 310 is detachably connected with the second connecting arm 220.

The lock member 310 includes a cam portion 311, and the cam portion 311 can abut against the first link arm 210. In addition, the locker 310 further includes a handle portion 312, the handle portion 312 being connected to the cam portion 311, the handle portion 312 facilitating the user's manipulation. The first connecting arm 210 is provided with a space-avoiding groove 211, the connecting element 320 is inserted into the space-avoiding groove 211, such that one end of the connecting element 320 is fixedly connected to the second connecting arm 220, and the other end of the connecting element 320 is located at a side of the first connecting arm 210 away from the second connecting arm 220, and is configured to be rotatably connected to the cam portion 311.

The locking assembly 30 further comprises a rotating shaft 330, the rotating shaft 330 is arranged in the connecting member 320 and the cam portion 311, if the split ring 100 is drawn to a plane, the rotating shaft 330 is perpendicular to the plane, so that the cam portion 311 can rotate relative to the connecting member 320 around the rotating shaft 330. During the rotation of the cam portion 311, the cam portion 311 applies an abutting force to the side of the first link arm 210 away from the second link arm 220. The end of the handle 312 away from the cam portion 311 can be connected to the second connecting arm 220 in a clamping manner, for example, a convex strip may be disposed on the handle 312, and a groove is disposed on the second connecting arm 220, so that when the convex strip and the groove are engaged with each other, the clamping connection between the handle 312 and the second connecting arm 220 can be realized. As another example, a rib may be provided on the second link arm 220 and a groove may be provided on the handle portion 312.

Referring to fig. 2, 5 and 6, in some embodiments, a locking slot 311a is formed on an inner side of the cam portion 311, wherein the inner side is a side of the cam portion 311 facing the handle portion 312. The first connecting arm 210 includes a protrusion 212, the protrusion 212 is located on an end of the first connecting arm 210 away from the clamping member 134, and the protrusion 212 is used for engaging with the slot 311a. For example, when the handle 312 is connected to the second connecting arm 220 in a snap-fit manner to achieve the locking function of the locking member 310, the protrusion 212 will be engaged in the slot 311a, so as to increase the locking force of the locking member 310, and improve the stability and reliability of the split ring 100 for clamping the inlet pipe.

Referring to fig. 7, 9 and 10, in some embodiments, the cam portion 311 includes a stop surface 311b, the connecting member 320 includes a limiting protrusion 321, the limiting protrusion 321 is located at an end of the connecting member 320 away from the second connecting arm 220, and the limiting protrusion 321 is disposed on a rotation path of the locking member 310, so that the limiting protrusion 321 can limit rotation of the locking member 310, avoid an excessively large rotation range of the locking member 310, and ensure that the unlocked handle portion 312 is in a position convenient to hold. For example, in the case that the locking member 310 is unlocked, the handle 312 will rotate away from the second connecting arm 220, and referring to fig. 8, when the abutting surface 311b abuts against the limiting boss 321, the locking member 310 stops moving away from the second connecting arm 220, so that the locking member 310 rotates away from the second connecting arm 220 by a set angle to reach the limiting position. So can prevent effectively that retaining member 310 after the unblock from rotating great angle until the support piece 133 of the first centre gripping section 130 of laminating, ensure that the handle portion 312 after the unblock is in the position of conveniently gripping to the operator singlehanded grips handle portion 312 fast and rotates in order to the pair, improves the convenience of ventricle coupling mechanism 10 operation.

With continued reference to fig. 1-3, in some embodiments, the ventricular connection mechanism 10 further includes a sewing ring 40, the sewing ring 40 can be sutured to biological tissues such as the heart by sutures, the sewing ring 40 is in a closed loop shape, the sewing ring 40 includes an annular cushion and a fabric layer covering the annular cushion, for example, the annular cushion is an implant-grade silicone member; the fabric layer is polyester fabric.

The first clamping section 130 and the second clamping section 140 are both provided with a plurality of suture holes 170, and the suture holes 170 are arranged around the clamping hole 110. A portion of the suture holes 170 are located on the support 133 of the first clamping section 130 and another portion of the suture holes 170 are located on the second clamping section 140. By providing suture holes 170, sutures can be threaded into the suture holes 170 to achieve a sutured connection between the split ring 100 and the suture ring 40.

The clamping assembly 20 is further provided with a plurality of positioning marks 180, the positioning marks 180 are used for marking the specific suture holes 170, the positioning marks 180 can be of convex or concave structures and the like, as long as the positioning marks can mark the suture holes 170, and the positioning marks 180 can be formed in a laser marking mode. In the present embodiment, the number of the positioning marks 180 is less than the number of the suture holes 170, and each positioning mark 180 corresponds to one of the suture holes 170.

As an example, the number of suture holes 170 may be thirty-two, eight of which 170 are pre-marked with the positioning indicia 180, and any two adjacent ones of the eight suture holes 170 may be equally angularly spaced in the circumferential direction of the split ring 100. Therefore, by the guiding function of the positioning mark 180, eight suture holes 170 can be preferentially sutured according to a specific suturing method, so as to realize the initial positioning of the open ring 100, and then the other suture holes 170 are sutured. In other embodiments, the provision of the sewing ring 40 may be omitted, for example, so that the split ring 100 is sewn directly onto the biological tissue. As another example, the sewing hole 170 in the split ring 100 can be omitted so that the split ring 100 is adhesively joined directly to the sewing ring 40.

In some embodiments, the end of the split ring 100 away from the sewing ring 40 is provided with an inner chamfer, and by providing the inner chamfer, the caliber of the portion of the clamping hole 110 corresponding to the inner chamfer is larger than the calibers of other portions, and the inner chamfer will play a role in guiding the clamping hole 110, so that the inlet tube can be inserted into the clamping hole 110 more easily, and the operation convenience of the ventricular connection mechanism 10 is further improved.

The following detailed description of the operating principle of the ventricular connection mechanism 10 provided in the present application is provided in conjunction with specific embodiments:

first, upon release of the locking assembly 30, the inlet tube is inserted into the clamping bore 110.

The handle portion 312 is then rotated such that the handle portion 312 rotates adjacent to the second grip segment 140. At this time, the cam portion 311 applies a pressing force to the first connecting arm 210 toward the second connecting arm 220, so that the first connecting arm 210 gradually moves closer to the second connecting arm 220 against its own elastic force, and then the widths of the first slit 120 and the second slit 230 gradually decrease, the width of the breaking groove 132 gradually increases, and the inner diameter of the clamping hole 110 also decreases. During the movement of the first connecting arm 210 close to the second connecting arm 220, the first connecting arm 210 will gradually store elastic potential energy.

Then, the handle 312 is connected with the second connecting arm 220 in a clamping manner, so that the locking member 310 is locked, at this time, the first connecting arm 210 stops moving, and the clamping member 134 applies a clamping force to the inlet tube, so that the inlet tube is stably and reliably clamped in the clamping hole 110.

When the clamping of the inlet pipe needs to be released, the clamping connection relationship between the handle part 312 and the second connecting arm 220 can be firstly released, namely, the locking piece 310 is unlocked. At this time, the elastic potential energy of the first connecting arm 210 is released, so that the first connecting arm 210 automatically moves away from the second connecting arm 220 to the initial position, and then the inlet pipe is pulled out from the clamping hole 110. It is apparent that when the first connecting arm 210 is in the initial position, the first connecting arm 210 does not store elastic potential energy, the widths of the first slit 120 and the second slit 230 are the largest, the width of the fracture groove 132 is the smallest, the inner diameter of the clamping hole 110 is the largest, and the locking member 310 is in the fully unlocked state.

To sum up, the utility model provides a ventricular coupling mechanism 10 includes centre gripping subassembly 20 and locking Assembly 30, centre gripping subassembly 20 includes first grip segment 130 and second grip segment 140, first grip segment 130 and second grip segment 140 enclose into centre gripping hole 110, first grip segment 130 includes relative first end 101 and second end 102, first end 101 is connected with second grip segment 140, second end 102 and second grip segment 140 interval, along first end 101 to second end 102, the internal surface of first grip segment 130 and the distance of the axis 116 of centre gripping hole 110 increase gradually, so can rationally increase the partial internal diameter of centre gripping hole 110, reduce the interference of the inlet tube of blood pump at the in-process of planting, ensure that the blood pump cooperates with centre gripping hole 110 fast, improve ventricular coupling mechanism 10 to the convenience of blood pump centre gripping in the operation process.

The utility model also provides a ventricle auxiliary device (not shown), ventricle auxiliary device include blood pump and ventricle coupling mechanism 10, and the blood pump includes the inlet tube, and the inlet tube can wear to locate centre gripping hole 110. This may improve the ease of operation of the ventricular assist device.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A ventricular attachment mechanism, comprising:

the clamping assembly comprises a first clamping section and a second clamping section, a clamping hole capable of clamping an inlet pipe of a blood pump is formed by the first clamping section and the second clamping section in a surrounding mode, the first clamping section comprises a first end and a second end which are opposite, the first end is connected with the second clamping section, the second end is spaced from the second clamping section, and the distance between the inner surface of the first clamping section and the central axis of the clamping hole is gradually increased from the first end to the second end; and

2. A ventricular connection mechanism according to claim 1, wherein the first clamp segment includes a clamp and a support, both of the clamp and the support being connected to the second clamp segment, the support partially surrounding the clamp and being spaced from the clamp to form a fracture groove.

3. A ventricular connection mechanism according to claim 1, wherein the second clamping section includes third and fourth opposing ends, the third end connected to the first end and the fourth end spaced from the second end, an inner surface of the second clamping section spaced a constant distance from the central axis of the clamping bore along the third end to the fourth end.

4. A ventricular connection mechanism according to claim 3, wherein the length of the first clamp segment is less than or equal to the length of the second clamp segment.

5. A ventricular attachment mechanism according to claim 1, wherein the clamp assembly further includes a first link arm connected to the second end and a second link arm connected to the second clamping section, a gap being formed between the first link arm and the second link arm at a spacing that is in communication with the clamping aperture, and the locking assembly being connected to the first link arm and the second link arm to adjust the size of the gap.

6. A ventricular attachment mechanism according to claim 5, wherein the locking assembly includes a locking member and a connecting member, the connecting member being connected to the second attachment arm, the locking member being rotatably connected to the connecting member and capable of abutting the first attachment arm, the locking member being detachably connected to the second attachment arm.

7. A ventricular connection mechanism according to claim 6, wherein the locking member includes a cam that abuts the first connection arm, the cam having a detent formed on an inner side thereof, the first connection arm including a projection for engaging the detent.

8. A ventricular attachment mechanism according to claim 6, wherein the connection member includes a stop boss located at an end remote from the second connection arm, the stop boss being disposed in the path of rotation of the retaining member.

9. A ventricular connection mechanism according to claim 1, wherein the first and second clamp segments each define a plurality of suture holes disposed around the clamp hole, the clamp assembly further defining a plurality of positioning indicia, the positioning indicia being fewer in number than the suture holes, each positioning indicia corresponding to a location of one of the suture holes.

10. A ventricular assist device comprising a blood pump and a ventricular connection mechanism as claimed in any one of claims 1 to 9, the blood pump including an inlet tube that is able to pass through the clamping holes.