Vascular occlusion test device

Abstract

The utility model provides a blood vessel occlusion test device, wherein a clamp is provided with a plurality of circumferentially staggered clips, each of which is formed with a concave arc segment, and the concave arc segments of all the clips are together formed around a caliber, so as to be suitable for driving each clip to pivot synchronously, so that the caliber size can be freely adjusted. According to the utility model, a continuous clamping state can be formed at the periphery of the blood vessel end, and the caliber size can be freely adjusted to flexibly adapt to blood vessels with different outer diameters, improve the connection sealing between the blood vessel end and the circulation pipeline, and ensure the accuracy of the test device in testing the hemostat occlusion condition.

Description

Technical Field

[0001] The utility model relates to the field of medical surgical instruments, in particular to a blood vessel occlusion testing device. Background Art

[0002] During surgery, a hemostat is used to temporarily stop bleeding on the incision on the side wall of a blood vessel. If the hemostasis effect is not good, it will cause excessive bleeding in young patients, and the blood leaking from the incision on the side wall of the blood vessel will interfere with the surgical operation. In order to ensure the temporary hemostasis effect during surgery, technicians use a blood vessel occlusion test device to perform in vitro occlusion tests on hemostat of different types and models. The existing blood vessel occlusion test device fixes the end of the blood vessel in the circulation pipeline through a core tube and a clamp. However, since the clamp can only achieve intermittent contact compression along the circumference of the outer periphery of the end of the blood vessel, the seal between the end of the blood vessel and the core tube is not tight during the test, resulting in fluid leakage, so that the change value of the liquid level in the liquid tank cannot accurately reflect the occlusion effect of the hemostat. Utility Model Content

[0003] The utility model provides a blood vessel occlusion testing device.

[0004] Specifically, the utility model is realized by the following technical solutions:

[0005] The present invention provides a blood vessel occlusion test device, comprising:

[0006] Base;

[0007] A pair of brackets are arranged on the base so as to be movable toward and away from each other;

[0008] A fixing mechanism, a pair of fixing mechanisms are respectively arranged on each bracket, each fixing mechanism is provided with a core tube and a clamp, one end of the hollow core tube is formed with a core portion for being sleeved by the end of the blood vessel, and the other end is connected to the circulation pipeline, and the clamp is provided with a freely adjustable caliber for clamping outside the end of the blood vessel;

[0009] Wherein, the clamp is provided with a plurality of circumferentially staggered clips, each of which is formed with a concave arc segment, and the concave arc segments of all the clips together surround and form a caliber, so as to be suitable for driving each clip to pivot synchronously, thereby being able to freely adjust the caliber size.

[0010] In some embodiments, the core is provided with a plurality of step rings with gradually changing outer diameters, and an end hole communicating with the hollow of the core tube is formed at the end of the step ring with the smallest outer diameter.

[0011] In some embodiments, the clamp includes a fixed part, a rotating part and a driving part, the fixed part is pivotally connected to each clip, the rotating part is connected to the contact contour of each clip, and the driving part drives the rotating part to rotate relative to the fixed part, so that each clip can pivot relative to the fixed part and move along the contact contour relative to the rotating part, thereby freely adjusting the caliber size.

[0012] In some embodiments, each clip is provided with a movable pin, and the rotating part is formed with a sliding groove corresponding to the movable pin of each clip, and the sliding groove extends radially along the rotating part so that the movable pin can move along the sliding groove.

[0013] In some embodiments, the slide groove forms an opening on the outer periphery of the rotating part.

[0014] In some embodiments, each clip is provided with a fixed pin, and the fixing portion is formed with a pivot hole corresponding to the fixed pin of each clip one by one, so that the movable pin can rotate in the pivot hole.

[0015] In some embodiments, a circumferential groove is formed on the outer periphery of the fixing portion, the circumferential groove covers a partial angle along the circumference of the rotating portion, and the driving portion is connected to the rotating portion and extends out through the circumferential groove.

[0016] In some embodiments, the fixed portion is provided with a back plate and an end ring, and the rotating portion is provided between the back plate and the end ring.

[0017] In some embodiments, the fixing portion is further provided with a retaining ring, which is disposed between the rotating portion and the end ring to prevent the rotating portion from detaching from the end ring.

[0018] In some embodiments, the retaining ring is formed with an opening.

[0019] According to the embodiment of the utility model, a plurality of clips are circumferentially staggered so that a portion of the concave arc segment of each clip is connected end to end to form a circular aperture, thereby forming a continuous clamping state at the periphery of the blood vessel end. The aperture size is freely adjustable and can flexibly adapt to blood vessels of different outer diameters, thereby improving the sealing of the connection between the blood vessel end and the circulation pipeline, and ensuring the accuracy of the test device in testing the sealing condition of the hemostat.

[0020] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0022] Figure 1is a schematic diagram of a blood vessel occlusion test device in one embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of a core tube in one embodiment of the utility model;

[0024] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0025] Figure 4 is a schematic diagram of a clamp in a first perspective in one embodiment of the utility model;

[0026] Figure 5 is a schematic diagram of a clamp from a second perspective in one embodiment of the utility model;

[0027] Figure 6 This is a schematic diagram of a clip in a first perspective in one embodiment of the utility model;

[0028] Figure 7 is a schematic diagram of a clip in an embodiment of the utility model from a second viewing angle;

[0029] Figure 8 It is a schematic diagram of the movement of the clip in one embodiment of the utility model;

[0030] Fig. 9 It is a schematic diagram of the arrangement of the clips in one embodiment of the utility model.

[0031] Reference numerals:

[0032] 10: base; 11: guide mechanism;

[0033] 20: bracket;

[0034] 30: core tube; 31: rod; 32: core; 321: step ring; 322: end hole;

[0035] 40: clamp; 41: fixing part; 411: pivot hole; 412: back plate; 413: end ring; 42: circumferential groove; 43: driving part; 44: retaining ring; 45: rotating part; 451: sliding groove; 46: clamping piece; 461: sheet body; 462: movable pin; 463: fixed pin; 464: concave arc segment. DETAILED DESCRIPTION

[0036] The present invention will now be discussed with reference to several embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present invention, rather than implying any limitation on the scope of the present invention.

[0037] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to"; the terms "embodiment" and "one embodiment" are to be interpreted as "at least one embodiment"; the term "another embodiment" is to be interpreted as "at least one other embodiment"; the terms "first", "second", etc. may refer to different or the same objects; the term "setting" is not limited to direct connection or indirect connection, nor is it limited to a specific connection method. Other explicit and implicit definitions may also be included below.

[0038] In the following description, some specific numerical values ​​or numerical ranges may be involved. It should be understood that these numerical values ​​and numerical ranges are merely exemplary, which may be helpful in putting the idea of ​​the present utility model into practice. However, the description of these examples is not intended to limit the scope of the present utility model in any way. According to specific application scenarios and requirements, these numerical values ​​or numerical ranges can be set separately.

[0039] As described above, the existing vascular occlusion test device has a problem that the seal between the end of the blood vessel and the core tube 30 is not tight, resulting in fluid leakage. The vascular occlusion test device proposed in the embodiment of the utility model at least partially solves the above problem. The structural composition and working principle of the vascular occlusion test device according to the exemplary embodiment of the utility model are described below.

[0040] The blood vessel occlusion test device of the present utility model embodiment generally comprises a base 10, a bracket 20 and a fixing mechanism, such as Figure 1 As shown, a pair of brackets 20 are arranged on the base 10 and can be moved toward and away from each other through a guide mechanism 11. The guide mechanism 11 can be a guide rail or a guide rod, which is used to adjust the stretching state of the blood vessel. A fixing mechanism is set on each bracket 20, and the fixing mechanism is used to fix the end of the blood vessel so as to connect the blood vessel with the circulation pipeline to form a circulation system. The liquid in the liquid tank is pumped into the circulation pipeline by a pressure pump. The pressure pump is adjusted to simulate the blood pressure of the human body. After a period of time, the amount of drop in the liquid level in the liquid tank is detected, so as to more accurately evaluate the occlusion of the blood vessel by the hemostat.

[0041] Each fixing mechanism is composed of a core tube 30 and a clamp 40. The core tube 30 is a hollow structure as a whole. Figure 2 and 3 As shown, it includes a rod portion 31 and a core portion 32. One end of the rod portion 31 is connected to the end of the blood vessel through the core portion 32, and the other end of the rod portion 31 is connected to the circulation pipeline. An end hole 322 is formed at the end of the core portion 32, and the end hole 322 is connected to the hollow structure of the core tube 30. When the core portion 32 is used to cover the blood vessel, the liquid can circulate between the blood vessel and the circulation pipeline through the end hole 322.

[0042] In one embodiment, the core 32 is formed as a conical structure as a whole, and the conical structure is divided into a plurality of step rings 321. The outer diameters of the plurality of step rings 321 decrease successively in the direction away from the rod 31. When it is necessary to perform occlusion tests on blood vessels of different calibers, it is only necessary to select a step ring 321 with a corresponding outer diameter according to the caliber of the blood vessel end to ensure that the inner wall of the blood vessel end and the step ring 321 are tightly supported.

[0043] The clamp 40 can clamp the blood vessel end on the step ring 321 of the core 32 in a continuous contact state at the periphery of the blood vessel end, and can obtain better sealing performance compared to intermittent contact clamping. Figure 4-9 As shown, the clamp 40 includes a fixing portion 41 , a rotating portion 45 , a driving portion 43 , a retaining ring 44 and a plurality of clips 46 .

[0044] In one embodiment, the fixing portion 41 is composed of a back plate 412 and an end ring 413 which are spliced ​​together front and back to form a shell of the clamp 40. The space formed in the shell is used to accommodate the rotating portion 45 and the clamp 46. The shell is in the shape of an annular disk, and a circumferential groove 42 is formed on the outer periphery of the annular disk. The circumferential groove 42 allows the driving portion 43 to extend out of the shell. The circumferential groove 42 only covers a partial angle. The movement range of the driving portion 43 is limited by the circumferential groove 42, thereby limiting the movement range of the clamp 46 to avoid damage to the clamp 46.

[0045] In one embodiment, the retaining ring 44 is installed between the clip 46 and the end ring 413 , and the retaining ring 44 protrudes radially inward from a portion of the end ring 413 , thereby clamping the clip 46 on one side of the retaining ring 44 to prevent the clip 46 from falling off the end ring 413 .

[0046] In one embodiment, the retaining ring 44 is formed as an open-loop retaining ring 44 having an opening, and the retaining ring 44 is compressed by pressing both sides of the opening, so as to facilitate the retaining ring 44 to be quickly installed into the housing.

[0047] In one embodiment, a plurality of clips 46 are arranged in a circumferentially staggered manner in the housing, and each clip 46 has a crescent-shaped body 461 as a whole, with a concave arc segment 464 formed on the inner side of the crescent, and a movable pin 462 and a fixed pin 463 are respectively arranged at the two end regions of the crescent for connecting with the rotating part 45 so as to be driven to move. Specifically, the arc shape of the concave arc segment 464 cannot be arbitrary, and at least the concave arc segment 464 portion that needs to be clamped on the outer periphery of the end of the blood vessel is consistent with the circular contour, so that the concave arc segments 464 of all clips 46 can jointly form a circular contour of any caliber size.

[0048] In one embodiment, a plurality of pivot holes 411 are circumferentially formed on the back plate 412 , each pivot hole 411 corresponds to a fixing pin 463 of a clip 46 , and the fixing pin 463 is disposed in the pivot hole 411 , thereby allowing the clip 46 to freely pivot around the pivot hole 411 .

[0049] In one embodiment, the rotating part 45 is in the shape of a disc, and a plurality of slide grooves 451 are provided in the circumferential direction of the rotating part 45, each slide groove 451 corresponds to a movable pin 462 of a clip 46, and the movable pin 462 is arranged in the slide groove 451 and can freely move along the contour formed by the slide groove 451, wherein the slide groove 451 extends along the radial direction of the disc and has an opening on the outer circumference, so that the movable pin 462 of the clip 46 can be quickly installed into the slide groove 451 through the opening. It can be understood by those skilled in the art that other "contact contour connection" methods can also be adopted, that is, a connection method that uses a cam contour to guide the movable pin 462 to move along the contour.

[0050] When using the blood vessel occlusion test device of the utility model, the blood vessel end is sleeved on the step ring 321 suitable for the core 32, and the driving part 43 is operated to rotate the rotating part 45 relative to the fixed part 41. During this process, each clip 46 pivots around the fixed pin 463, and at the same time, the movable pin 462 is driven by the rotating part 45 to move in the slide groove 451, so that each clip 46 moves inward, and a part of the arc segment of all the clips 46 is together formed around the caliber. By conveniently adjusting the caliber size, the clamp 40 can contact and compress the outer periphery of the blood vessel end in a continuous manner, thereby ensuring the sealing of the blood vessel end connection, and it is easy to operate and adjust the appropriate clamping force on the outer periphery of the blood vessel end.

[0051] The description of the embodiments herein and any reference to directions and orientations are only for the convenience of description and are not to be construed as any limitation on the scope of protection of the present invention. The description of the preferred embodiments may involve a combination of features, which may exist independently or in combination, and the present invention is not particularly limited to the preferred embodiments. The scope of the present invention is defined by the claims.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A blood vessel occlusion test device, characterized in that: include: Base (10); A pair of brackets are arranged on the base (10) so as to be movable toward and away from each other; A fixing mechanism, wherein a pair of fixing mechanisms are respectively arranged on each bracket (20), each fixing mechanism is provided with a core tube (30) and a clamp (40), one end of the hollow core tube (30) is formed with a core portion (32) for being sleeved by the end of the blood vessel, and the other end is connected to the circulation pipeline, and the clamp (40) is provided with a freely adjustable caliber for clamping outside the end of the blood vessel; The clamp (40) is provided with a plurality of circumferentially staggered clips (46), each of the clips (46) is formed with a concave arc segment (464), and the concave arc segments (464) of all the clips (46) are together formed around a caliber, so as to be suitable for driving each clip (46) to pivot synchronously, thereby freely adjusting the caliber size.

2. The blood vessel occlusion test device according to claim 1, characterized in that: The core part (32) is provided with a plurality of step rings (321) with gradually changing outer diameters, and an end hole (322) communicating with the hollow of the core tube (30) is formed at the end of the step ring (321) with the smallest outer diameter.

3. The blood vessel occlusion test device according to claim 1, characterized in that: The clamp (40) includes a fixed portion (41), a rotating portion (45) and a driving portion (43); the fixed portion (41) is pivotally connected to each clip (46); the rotating portion (45) is connected to each clip (46) in a contact profile; the driving portion (43) drives the rotating portion (45) to rotate relative to the fixed portion (41), so that each clip (46) can pivot relative to the fixed portion (41) and each clip (46) can move along the contact profile relative to the rotating portion (45), thereby freely adjusting the caliber.

4. The blood vessel occlusion test device according to claim 3, characterized in that: Each clamp (46) is provided with a movable pin (462), and the rotating portion (45) is formed with a slide groove (451) corresponding to the movable pin (462) of each clamp (46), and the slide groove (451) extends along the radial direction of the rotating portion (45), so that the movable pin (462) can move along the slide groove (451).

5. The blood vessel occlusion test device according to claim 4, characterized in that: The slide groove (451) forms an opening on the outer periphery of the rotating part (45).

6. The blood vessel occlusion test device according to claim 3, characterized in that: Each clip (46) is provided with a fixing pin (463), and the fixing portion (41) is formed with a pivot hole (411) corresponding one-to-one to the fixing pin (463) of each clip (46), so that the fixing pin (463) can rotate in the pivot hole (411).

7. The blood vessel occlusion test device according to claim 3, characterized in that: A circumferential groove (42) is formed on the outer periphery of the fixing portion (41), and the circumferential groove (42) covers a partial angle along the circumference of the rotating portion (45). The driving portion (43) is connected to the rotating portion (45) and extends out through the circumferential groove (42).

8. The blood vessel occlusion test device according to claim 3, characterized in that: The fixed portion (41) is provided with a back plate (412) and an end ring (413), and the rotating portion (45) is provided between the back plate (412) and the end ring (413).

9. The blood vessel occlusion test device according to claim 8, characterized in that: The fixing portion (41) is further provided with a retaining ring (44), which is arranged between the rotating portion (45) and the end ring (413) to prevent the rotating portion (45) from being separated from the end ring (413).

10. The blood vessel occlusion test device according to claim 9, characterized in that: The retaining ring (44) is formed with an opening.

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