A laparoscopic inferior vena cava tumor thrombus removal instrument

Abstract

The present invention discloses an instrument for removing cancer thrombus from the inferior vena cava under laparoscopy, belonging to the technical field of medical instruments. The instrument comprises a scoop rod and a scoop body, wherein the scoop body is installed at one end of the scoop rod through a connecting block, wherein the scoop body comprises an elastic ring and a flexible membrane, wherein the connecting block is fixedly installed on one side of the elastic ring, wherein the flexible membrane is circular, and the edge of the flexible membrane is fixedly connected to the elastic ring, wherein a plug hole is provided on the connecting block, wherein the plug hole is arranged along the radial direction of the elastic ring, and wherein a shrinking mechanism is arranged inside the scoop rod, wherein the shrinking mechanism can be moved out of the plug hole to push the elastic ring, thereby deforming the elastic ring. The present invention can switch between the contraction state and the expansion state of the scoop body by arranging a shrinking mechanism, and when the cancer thrombus in the inferior vena cava is thick and the scoop in the expanded state is difficult to enter, the circular scoop body is adjusted to an elliptical contraction state, so that the scoop body can be extended from the opening of the inferior vena cava into the inferior vena cava, thereby facilitating the operation of removing the cancer thrombus.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more specifically to a laparoscope-assisted inferior vena cava cancer thrombus removal device. Background Art

[0002] Inferior vena cava cancer thrombus refers to the phenomenon that malignant tumor cells (such as kidney cancer and liver cancer) invade the inferior vena cava through direct infiltration or blood circulation and form blood clots or tumor thrombi therein, which usually occurs in the advanced stage of cancer. Inferior vena cava cancer thrombus can cause obstruction of blood flow in the inferior vena cava, leading to a series of clinical symptoms such as lower limb edema, abdominal distension and low back pain. In addition, inferior vena cava cancer thrombus has a very high risk of detachment. When detached, the cancer thrombus can enter the lungs with the blood flow, causing pulmonary embolism, and in severe cases may even cause sudden death of the patient. Therefore, the formation of inferior vena cava cancer thrombus poses a great threat to the life and health of patients.

[0003] At present, surgical removal is an effective method for treating inferior vena cava cancer thrombus. However, when the transverse diameter of the cancer thrombus in the inferior vena cava is thick and the length is long, it is difficult to remove the cancer thrombus in the inferior vena cava. The current removal method mainly involves inserting surgical grasping forceps into the inferior vena cava to grasp the cancer thrombus and then remove it. This method is slow to remove the cancer thrombus, and some cancer thrombus are loose in texture. In addition, this grasping method easily causes the cancer thrombus to break, and in severe cases, it enters the blood circulation and causes complications such as pulmonary embolism. For this reason, a laparoscopic inferior vena cava cancer thrombus removal instrument is proposed. Summary of the invention

[0004] In view of the problem that the existing method of removing cancer thrombi is slow and some cancer thrombi are loose in texture, this grasping method easily causes the cancer thrombi to break, and in severe cases, they enter the blood circulation and cause complications such as pulmonary embolism. The purpose of the present invention is to provide a laparoscopic inferior vena cava cancer thrombus removal instrument.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A laparoscope-assisted inferior vena cava cancer thrombus removal instrument comprises a scoop rod and a scoop body, characterized in that the scoop body is mounted on one end of the scoop rod through a connecting block, the scoop body comprises an elastic ring and a flexible membrane, an opening is provided on one side of the elastic ring close to the scoop rod, the connecting block is located inside the opening, and both sides of the outer surface of the connecting block are respectively fixedly connected to the two ends of the elastic ring, the flexible membrane is circular, and the edge of the flexible membrane is fixedly connected to the elastic ring, a plug hole is provided on the connecting block, the plug hole is arranged along the radial direction of the elastic ring, a shrinking mechanism is arranged in the scoop rod, and the shrinking mechanism can be moved out of the plug hole to push the elastic ring to deform the elastic ring;

[0007] The shrinking mechanism includes a push rod arranged inside the digging spoon rod, the push rod is aligned with the socket, one end of the push rod away from the connecting block passes through the outside of the digging spoon rod and is fixedly connected with a pull ring, a first spring is sleeved on the surface of the push rod located outside the digging spoon rod, one end of the first spring is fixedly connected to the pull ring, and the other end of the first spring is fixedly connected to the end of the digging spoon rod. In a natural state, the first spring keeps one end of the push rod away from the connecting block.

[0008] Optionally, one end of the connecting block is rotatably mounted inside the digging spoon rod portion via a rotating shaft, and an angle adjustment mechanism is provided inside the digging spoon rod portion, and the angle adjustment mechanism is used to adjust the angle of the connecting block.

[0009] Optionally, the angle adjustment mechanism includes a gear fixedly mounted on a rotating shaft, the gear being coaxially arranged with the rotating shaft, a tooth plate being arranged inside the digging scoop rod, the tooth plate being meshing with the gear, an end of the tooth plate away from the connecting block being fixedly connected with an annular plate, the push rod being located inside the annular plate and slidingly matched with the annular plate, a slider being fixedly connected with the outer surface of the annular plate along its radial direction, a through groove matching with the slider being provided on the surface of the digging scoop rod, the slider being fitted inside the through groove and forming a moving pair therein, and one end of the slider extending to the outside of the digging scoop rod being fixedly connected with a push plate.

[0010] Optionally, a movably arranged pressure block is inserted on the push plate, and one end of the pressure block is in contact with the outer surface of the digging spoon rod.

[0011] Optionally, the sliding block is located at one-half of the push plate, and the length of the push plate is greater than the length of the through slot.

[0012] Optionally, an alignment mechanism is provided at one end of the push rod close to the connection block, and the alignment mechanism can align the insertion hole on the surface of the connection block with the push rod.

[0013] Optionally, the alignment mechanism includes a slide groove opened on the surface of the push rod, the slide groove is located at one end of the push rod close to the connecting block, and the slide groove is connected up and down, and a U-shaped slide plate is arranged inside the slide groove, the open end of the U-shaped slide plate is arranged in the same direction as the embedding groove and is fixedly connected with a alignment plate, the alignment plate is symmetrically arranged up and down based on the rotating axis of the connecting block, a through hole adapted to the push rod is opened at the center of the alignment plate, the push rod can be moved in or out of the through hole, an elastic member is arranged inside the slide groove, and in a natural state, the elastic member can make the push rod and the through hole in a non-contact state.

[0014] Optionally, the elastic member includes a guide rod fixedly installed inside the slide groove, a guide groove adapted to the guide rod is opened at the center of the closed end of the U-shaped slide plate, and the guide rod passes through the guide groove, a second spring is sleeved on the surface of the guide rod, one end of the second spring is fixedly connected to the U-shaped slide plate, and the other end of the second spring is fixedly connected to the inner surface of the slide groove.

[0015] Optionally, an embedding groove is formed at one end of the push rod close to the connecting block, and the embedding groove is configured as an arc-shaped structure adapted to the elastic ring.

[0016] Optionally, one end of the digging spoon rod close to the connecting block is fixedly connected to a rubber sleeve, the connecting block is partially fixedly connected to the rubber sleeve, and the connecting block is located at the center of the rubber sleeve.

[0017] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects:

[0018] In the above scheme, by providing a shrinking mechanism, the contraction state and expansion state of the scoop body can be switched. When the cancer thrombus in the inferior vena cava is thick and the scoop in the expanded state is difficult to enter, the circular scoop body is adjusted to the elliptical contraction state, so that the scoop body can be easily extended into the inferior vena cava through the opening of the inferior vena cava, thereby facilitating the removal of the cancer thrombus.

[0019] The angle between the digging spoon rod and the digging spoon body is adjusted by the angle adjustment mechanism so that the angle between the digging spoon rod and the digging spoon body is suitable for removing the cancer thrombus, and then the cancer thrombus in the inferior vena cava can be removed by operating the digging spoon rod;

[0020] By providing a straightening mechanism, when it is necessary to switch the scoop body in the expanded state to the scoop body in the contracted state, the straightening mechanism can be used to straighten the connecting block so that the socket on the connecting block is aligned with the push rod, which facilitates the push rod to enter the socket. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 Structural cross-sectional view of

[0024] Figure 3 It is a structural schematic diagram of the body of the digging spoon of the present invention;

[0025] Figure 4 It is a partial structural schematic diagram of the necking mechanism of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the straightening mechanism of the present invention;

[0027] Figure 6 It is a structural schematic diagram of a U-shaped slide plate and a straightening plate in the straightening mechanism of the present invention;

[0028] Figure 7 It is a partial structural schematic diagram of the angle adjustment mechanism of the present invention;

[0029] Figure 8 For the present invention Figure 2 The enlarged view of point A in the middle;

[0030] Fig. 9 For the present invention Figure 2 The enlarged view of point B in the middle;

[0031] Fig.10 It is a cross-sectional view of the body of the digging spoon of the present invention.

[0032] [Reference Signs]

[0033] 1. Digging spoon rod;

[0034] 2. scoop body; 21. elastic ring; 22. flexible membrane;

[0035] 3. Connecting block; 4. Socket;

[0036] 5. Narrowing mechanism; 51. Push rod; 52. First spring; 53. Pull ring;

[0037] 6. Angle adjustment mechanism; 61. Gear; 62. Tooth plate; 63. Ring plate; 64. Through groove; 65. Slider; 66. Push plate; 67. Press block;

[0038] 7. Rotating shaft;

[0039] 8. Alignment mechanism; 81. Slideway; 82. Guide rod; 83. Second spring; 84. U-shaped slide plate; 85. Alignment plate; 86. Through hole; 87. Guideway;

[0040] 9. Groove; 10. Rubber sleeve.

[0041] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0042] The following is a detailed description of a laparoscopic inferior vena cava cancer thrombus removal device provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0043] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0044] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0045] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0046] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0047] like Figures 1 to 10As shown, an embodiment of the present invention provides a laparoscope-assisted inferior vena cava cancer thrombus removal instrument, comprising a spoon rod 1 and a spoon body 2, wherein the spoon body 2 is mounted on one end of the spoon rod 1 via a connecting block 3, wherein the spoon body 2 comprises an elastic ring 21 and a flexible membrane 22, wherein the elastic ring 21 is provided with an opening on one side close to the spoon rod 1, wherein the connecting block 3 is located inside the opening, and both sides of the outer surface of the connecting block 3 are respectively fixedly connected to the two ends of the elastic ring 21, wherein the flexible membrane 22 is circular, and the edge of the flexible membrane 22 is fixedly connected to the elastic ring 21, wherein a plug hole 4 is provided on the connecting block 3, wherein the plug hole 4 is radially arranged along the elastic ring 21, and a shrinking mechanism 5 is provided inside the spoon rod 1, wherein the shrinking mechanism 5 can be moved out of the plug hole 4 to push the elastic ring 21 to deform the elastic ring 21;

[0048] The shrinking mechanism 5 includes a push rod 51 arranged inside the digging spoon rod 1, the push rod 51 is aligned with the socket 4, one end of the push rod 51 away from the connecting block 3 passes through the outside of the digging spoon rod 1 and is fixedly connected with a pull ring 53, and a first spring 52 is sleeved on the surface of the push rod 51 located outside the digging spoon rod 1, one end of the first spring 52 is fixedly connected to the pull ring 53, and the other end of the first spring 52 is fixedly connected to the end of the digging spoon rod 1. In the natural state, the first spring 52 makes one end of the push rod 51 away from the connecting block 3.

[0049] The push rod 51 has an embedding groove 9 at one end close to the connecting block 3 . The embedding groove 9 is configured as an arc structure adapted to the elastic ring 21 . By configuring the embedding groove 9 , the elastic ring 21 can be embedded in the embedding groove 9 , so that the push rod 51 can push the elastic ring 21 .

[0050] One end of the scoop rod 1 close to the connecting block 3 is fixedly connected to a rubber sleeve 10 , a portion of the connecting block 3 is fixedly connected to the rubber sleeve 10 , and the connecting block 3 is located at the center of the rubber sleeve 10 .

[0051] The rubber sleeve 10 can block the gap between the connecting block 3 and the digging spoon rod 1 , and the rubber sleeve 10 is soft and can rotate in coordination with the connecting block 3 .

[0052] The elastic ring 21 and the flexible membrane 22 in this embodiment form a circular scoop body 2, the flexible membrane 22 has a certain toughness, and the center of the flexible membrane 22 is concave, and the cross-section of the flexible membrane 22 is an arc structure. The scoop body 2 is circular in use, and the elastic ring 21 is in a naturally expanded annular state, and the flexible membrane 22 of the scoop body 2 is naturally stretched; the contracted state of the scoop body 2 is elliptical, the elastic ring 21 is in an elliptical state in the contracted state, and the flexible membrane 22 is tightened and folded as the elastic ring 21 contracts. When the cancer thrombus in the inferior vena cava is thick and the scoop in the expanded state is difficult to enter, the circular scoop body 2 is adjusted to the elliptical contracted state, so that the scoop body 2 is easily extended into the inferior vena cava from the opening of the inferior vena cava. After the contracted scoop body 2 is extended into the inferior vena cava, the contracted scoop body 2 is adjusted to the expanded scoop body 2, and then the scoop rod 1 is operated to dig out the cancer thrombus in the inferior vena cava. When there are few tumor thrombi in the inferior vena cava and the expanded scoop body 2 can directly enter the inferior vena cava, the tumor thrombi in the inferior vena cava can be directly scooped out by the expanded scoop body 2.

[0053] The contracted state and the expanded state of the digging spoon body 2 are switched by the shrinking mechanism 5. Specifically, when the digging spoon body 2 in the expanded state needs to be switched to the contracted state, the user holds the digging spoon rod 1, places the index finger inside the pull ring 53 and pushes the pull ring 53 and the push rod 51, so that the push rod 51 moves out through the socket 4 on the connecting block 3. At this time, the first spring 52 is in a compressed state. When the push rod 51 moves to contact the elastic ring 21, it continues to push the push rod 51, so that the elastic ring 21 is deformed into an elliptical shape, thereby realizing the switching between the expanded state and the contracted state of the digging spoon body 2, so that the digging spoon body 2 can be switched. The opening of the spoon body 2 is reduced, thereby facilitating the spoon body 2 to enter the interior of the inferior vena cava; when it is necessary to switch the contracted spoon body 2 to the expanded state to remove the cancer thrombus in the inferior vena cava, the user only needs to loosen the pull ring 53, and the compressed first spring 52 is restored, driving the pull ring 53 and the push rod 51 to move back, so that the push rod 51 is moved back into the spoon rod 1, and the push rod 51 no longer presses against the elastic ring 21. The elastic ring 21 is restored to a circular structure under the action of its own elastic force, that is, the contracted spoon body 2 can be switched back to the expanded state.

[0054] In this embodiment, the radial cross-section of the elastic ring 21 can be set as a concave circular structure with the top concave inward, and a V-shaped structure is set at the transition between the outer circular surface and the inner concave surface of the elastic ring 21. The V-shaped structure has a certain hardness and can effectively scrape or cut the cancer thrombus adhered to the blood vessel wall, so as to facilitate the smooth removal of the cancer thrombus.

[0055] One end of the connection block 3 is rotatably mounted inside the digging spoon rod 1 via a rotating shaft 7 . An angle adjustment mechanism 6 is provided inside the digging spoon rod 1 . The angle adjustment mechanism 6 is used to adjust the angle of the connection block 3 .

[0056] The angle adjustment mechanism 6 includes a gear 61 fixedly mounted on the rotating shaft 7, the gear 61 is coaxially arranged with the rotating shaft 7, a tooth plate 62 is arranged inside the digging spoon rod 1, the tooth plate 62 is meshed with the gear 61, an end of the tooth plate 62 away from the connecting block 3 is fixedly connected with an annular plate 63, the push rod 51 is located inside the annular plate 63 and slidably cooperates with it, a slider 65 is fixedly connected to the outer surface of the annular plate 63 along its radial direction, a through groove 64 adapted to the slider 65 is opened on the surface of the digging spoon rod 1, the slider 65 is installed in the through groove 64 and forms a moving pair therein, and one end of the slider 65 extends to the outside of the digging spoon rod 1 and is fixedly connected with a push plate 66.

[0057] The push plate 66 is provided with a movably arranged pressing block 67 , one end of which contacts the outer surface of the digging spoon rod 1 .

[0058] The slider 65 is located at one-half of the push plate 66 , and the length of the push plate 66 is greater than the length of the through slot 64 .

[0059] During actual use, the angle between the scoop rod 1 and the scoop body 2 can be adjusted by the angle adjustment mechanism 6 so that the angle between the scoop rod 1 and the scoop body 2 is suitable for removing the cancer thrombus. Then, the cancer thrombus in the inferior vena cava can be removed by operating the scoop rod 1.

[0060] In this embodiment, the end of the digging spoon rod 1 close to the digging spoon body 2 is the head end of the digging spoon rod 1, and the end of the digging spoon rod 1 away from the digging spoon body 2 is the end of the digging spoon rod 1. The operating part of the angle adjustment mechanism 6 is set at the end of the digging spoon rod 1. The user moves the push plate 66 to drive the slider 65, the annular plate 63 and the tooth plate 62 to move. Since the tooth plate 62 is meshed with the gear 61, when the tooth plate 62 moves, it can drive the gear 61, the rotating shaft 7, the connecting block 3 and the digging spoon body 2 to rotate, thereby achieving the purpose of adjusting the angle of the digging spoon body 2. When the angle adjustment of the digging spoon body 2 is completed, After completion, the user presses the pressure block 67 on the push plate 66 to make the pressure block 67 rest against the outer surface of the digging spoon rod 1. The friction force between the pressure block 67 and the digging spoon rod 1 fixes the positions of the push plate 66, the slider 65, the tooth plate 62, the gear 61 and the digging spoon body 2, so that the digging spoon body 2 and the digging spoon rod 1 maintain a certain angle. In actual use, a limiting groove adapted to the pressure block 67 can also be set along the direction of the pressure block 67. When it is necessary to keep the digging spoon body 2 and the digging spoon rod 1 at a certain angle for a long time, the pressure block 67 can be inserted into the corresponding limiting groove to keep the relative position of the digging spoon body 2 and the digging spoon rod 1 fixed.

[0061] It should be noted that the angle between the scoop body 2 and the scoop rod 1 is controlled by the position of the push plate 66. Corresponding scale lines can be set on the surface of the scoop rod 1, and the position of the push plate 66 can be adjusted according to the scale lines, so that the angle of the scoop body 2 can be adjusted by moving the push plate 66.

[0062] An alignment mechanism 8 is disposed at one end of the push rod 51 close to the connection block 3 , and the alignment mechanism 8 can align the insertion hole 4 on the surface of the connection block 3 with the push rod 51 .

[0063] The alignment mechanism 8 includes a slide groove 81 opened on the surface of the push rod 51, the slide groove 81 is located at one end of the push rod 51 close to the connecting block 3, and the slide groove 81 is connected vertically, and a U-shaped slide plate 84 is arranged inside the slide groove 81, and the open end of the U-shaped slide plate 84 is arranged in the same direction as the embedding groove 9 and is fixedly connected with a alignment plate 85, the alignment plate 85 is symmetrically arranged up and down based on the rotating axis of the connecting block 3, and a through hole 86 adapted to the push rod 51 is opened at the center of the alignment plate 85, and the push rod 51 can be moved into or out of the through hole 86, and an elastic member is arranged inside the slide groove 81, and in a natural state, the elastic member can make the push rod 51 and the through hole 86 in a non-contact state.

[0064] The elastic member includes a guide rod 82 fixedly installed inside the slide groove 81, a guide groove 87 adapted to the guide rod 82 is opened at the center of the closed end of the U-shaped slide plate 84, and the guide rod 82 passes through the guide groove 87, and a second spring 83 is sleeved on the surface of the guide rod 82, one end of the second spring 83 is fixedly connected to the U-shaped slide plate 84, and the other end of the second spring 83 is fixedly connected to the inner surface of the slide groove 81.

[0065] In this embodiment, by providing a straightening mechanism 8, when it is necessary to switch the scoop body 2 in the expanded state to the scoop body 2 in the contracted state, the straightening mechanism 8 can be used to straighten the connecting block 3 so that the socket 4 on the connecting block 3 is aligned with the push rod 51. Specifically, when the push rod 51 is moved, the straightening plate 85 first contacts the connecting block 3. If the connecting block 3 is in an inclined state, when the straightening plate 85 continues to move, the straightening plate 85 can drive the inclined connecting block 3 to move until the entire side of the connecting block 3 contacts the straightening plate 85, that is, the connecting block 3 changes from an inclined state to a horizontal state, and the socket 4 on the connecting block 3 is thereby aligned with the push rod 51, making it convenient for the push rod 51 to enter the socket 4.

[0066] By providing the slide groove 81 and the U-shaped slide plate 84, the alignment plate 85 and the push rod 51 can move relative to each other, and the length of the slide groove 81 needs to be sufficient for the push rod 51 to be able to move out of the through hole 86 and the plug hole 4, and the push rod 51 can deform the elastic ring 21. By providing the elastic member, in a natural state, the push plate 66 keeps a distance from the end of the push rod 51, so when the push rod 51 is moved, the alignment plate 85 can first contact the connection block 3, and when the alignment plate 85 contacts the connection block 3 and aligns the connection block 3, the push rod 51 continues to move out of the through hole 86 and the plug hole 4.

[0067] The working process of the technical solution provided by the present invention is as follows:

[0068] When the user uses the removal instrument to remove the cancer thrombus in the inferior vena cava, first, the size of the cancer thrombus is determined based on the laparoscope display. When the cancer thrombus is large, the shrinking mechanism 5 is used to shrink the spoon body 2. After the shrunken spoon body 2 is inserted into the inferior vena cava, the shrinking mechanism 5 is used to expand the spoon body 2. According to the position and angle of the cancer thrombus, the relative position of the spoon rod 1 and the spoon body 2 is adjusted by the angle adjustment mechanism 6 so that the angle between the spoon rod 1 and the spoon body 2 is suitable for digging out the cancer thrombus. After the adjustment is completed, the user operates the spoon rod 1 through the laparoscope to drive the spoon body 2 to move until the cancer thrombus is dug out. When the cancer thrombus in the inferior vena cava is small, the expanded spoon body 2 can directly enter the inferior vena cava. Therefore, the cancer thrombus in the inferior vena cava can be directly dug out by the expanded spoon body 2.

[0069] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0070] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A laparoscope-assisted inferior vena cava tumor thrombus removal instrument, comprising a scoop rod and a scoop body, characterized in that: The digging spoon body is installed at one end of the digging spoon rod through a connecting block, and the digging spoon body includes an elastic ring and a flexible membrane. The elastic ring is provided with an opening on one side close to the digging spoon rod, and the connecting block is located inside the opening, and the two sides of the outer surface of the connecting block are respectively fixedly connected to the two ends of the elastic ring, the flexible membrane is circular, and the edge of the flexible membrane is fixedly connected to the elastic ring, and a plug hole is provided on the connecting block, and the plug hole is arranged along the radial direction of the elastic ring. A shrinking mechanism is arranged in the digging spoon rod, and the shrinking mechanism can be moved out of the plug hole to push the elastic ring to deform the elastic ring; The shrinking mechanism includes a push rod arranged inside the digging spoon rod, the push rod is aligned with the insertion hole, one end of the push rod away from the connection block passes through the outside of the digging spoon rod and is fixedly connected with a pull ring, a first spring is sleeved on the surface of the push rod located outside the digging spoon rod, one end of the first spring is fixedly connected to the pull ring, and the other end of the first spring is fixedly connected to the end of the digging spoon rod, and in a natural state, the first spring keeps one end of the push rod away from the connection block; One end of the connecting block is rotatably mounted inside the digging spoon rod through a rotating shaft, and an angle adjustment mechanism is provided inside the digging spoon rod, and the angle adjustment mechanism is used to adjust the angle of the connecting block; The angle adjustment mechanism includes a gear fixedly mounted on the rotating shaft, the gear is coaxially arranged with the rotating shaft, a tooth plate is arranged inside the digging spoon rod, the tooth plate is meshed with the gear, an annular plate is fixedly connected to one end of the tooth plate away from the connecting block, the push rod is located inside the annular plate and slidably cooperates with the annular plate, a slider is fixedly connected to the outer surface of the annular plate along its radial direction, a through groove adapted to the slider is opened on the surface of the digging spoon rod, the slider is cooperated and installed inside the through groove and forms a moving pair inside the through groove, and one end of the slider extends to the outside of the digging spoon rod and is fixedly connected to a push plate; A movably arranged pressing block is inserted on the push plate, and one end of the pressing block contacts the outer surface of the digging spoon rod.

2. The laparoscopic inferior vena cava tumor thrombus removal device according to claim 1, characterized in that: The sliding block is located at one-half of the push plate, and the length of the push plate is greater than the length of the through slot.

3. The laparoscopic inferior vena cava tumor thrombus removal device according to claim 1, characterized in that: An alignment mechanism is arranged at one end of the push rod close to the connection block, and the alignment mechanism can align the insertion hole on the surface of the connection block with the push rod.

4. The laparoscopic inferior vena cava tumor thrombus removal device according to claim 3, characterized in that: An embedding groove is formed at one end of the push rod close to the connecting block, and the embedding groove is configured as an arc structure adapted to the elastic ring.

5. The laparoscopic inferior vena cava tumor thrombus removal device according to claim 4, characterized in that: The alignment mechanism includes a slide groove opened on the surface of the push rod, the slide groove is located at one end of the push rod close to the connecting block, and the slide groove is connected up and down, and a U-shaped slide plate is arranged inside the slide groove, the open end of the U-shaped slide plate is arranged in the same direction as the embedding groove and is fixedly connected with a alignment plate, the alignment plate is symmetrically arranged up and down based on the rotating axis of the connecting block, a through hole adapted to the push rod is opened at the center of the alignment plate, the push rod can be moved in or out of the through hole, an elastic member is arranged inside the slide groove, and in a natural state, the elastic member can make the push rod and the through hole in a non-contact state.

6. The laparoscopic inferior vena cava tumor thrombus removal device according to claim 5, characterized in that: The elastic member includes a guide rod fixedly installed inside the slide groove, a guide groove adapted to the guide rod is opened at the center of the closed end of the U-shaped slide plate, and the guide rod passes through the guide groove, a second spring is sleeved on the surface of the guide rod, one end of the second spring is fixedly connected to the U-shaped slide plate, and the other end of the second spring is fixedly connected to the inner surface of the slide groove.

7. The laparoscopic inferior vena cava tumor thrombus removal device according to claim 1, characterized in that: One end of the digging spoon rod portion close to the connecting block is fixedly connected with a rubber sleeve, a part of the connecting block is fixedly connected with the rubber sleeve, and the connecting block is located at the center of the rubber sleeve.

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