Simple suction tube for removing blood clots during upper gastrointestinal hemorrhage

Abstract

The invention discloses a simple suction tube for removing blood clots for upper gastrointestinal hemorrhage, and belongs to the technical field of medical instruments, the simple suction tube comprises a tube body which is driven by an external negative pressure source to suck and remove the blood clots at the gastrointestinal hemorrhage position; the tip is located at the inlet of the tube body, and the tip comprises a conical section and a cylindrical section; the suction holes are obliquely formed in the tip end in a circumferential array mode, and feeding ports of the suction holes are located in the connecting position of the conical section and the cylindrical section. By means of the elastic film and the cutting edges, periodic negative pressure is generated through negative pressure nodes, so that the elastic film is driven to deform periodically, the cutting edges are driven to vibrate in the radial direction in the suction holes, and compared with static cutting, the probability of the blocking phenomenon is effectively reduced; the breaking efficiency of the blood clots and the clearing efficiency of the blood clots in the upper digestive tract are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a simple suction tube for removing blood clots in upper gastrointestinal bleeding. Background Art

[0002] When removing blood clots at the upper gastrointestinal bleeding site, negative pressure suction is usually carried out through a suction tube bound to a gastroscope. Since blood clots are tough and vary in size, blockage is likely to occur during suction. It is necessary to remove the suction tube for blockage removal and then re-enter the upper gastrointestinal tract to remove blood clots. This not only reduces the removal efficiency, but also makes the patient feel uncomfortable when the suction tube repeatedly enters the human body, and may cause damage to the upper gastrointestinal mucosa.

[0003] In the prior art, cutting edges are usually provided inside the tip of the suction tube to break up the incoming blood clots and prevent blockage. However, due to the setting of the cutting edges, the channel area inside the tube is further reduced. Since there is a certain concentration of blood in the blood clots, when cutting the blood clots, blood clot debris will adhere to the surface of the cutting edges. Over time, blockage will also occur at the part where the cutting edges are provided, and the crushing effect of static cutting is not good. Summary of the Invention

[0004] The purpose of the present invention is to provide a simple suction tube for removing blood clots in upper gastrointestinal bleeding, which is used to solve the technical problems in the prior art that due to the setting of the cutting edges, the channel area inside the tube is further reduced, and since there is a certain concentration of blood in the blood clots, when cutting the blood clots, blood clot debris will adhere to the surface of the cutting edges. Over time, blockage will also occur at the part where the cutting edges are provided, and the crushing effect of static cutting is not good.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A simple suction tube for removing blood clots in upper gastrointestinal bleeding, comprising:

[0006] A tube body, which is driven by an external negative pressure source to suck the upper gastrointestinal bleeding site and remove blood clots;

[0007] A tip, which is located at the entrance of the tube body, and the tip includes a conical section and a cylindrical section;

[0008] Suction holes, which are obliquely arranged in a circumferential array inside the tip, and the feed ports of the suction holes are located at the connection of the conical section and the cylindrical section;

[0009] A dynamic cutting unit, which is arranged in a circumferential array on the hole wall of the suction holes, and the vibration cutting unit includes:

[0010] Cutting edges, which are arranged on the hole wall of the suction holes;

[0011] An elastic membrane, which is arranged in an arc shape on the inner wall of the suction hole, and the top of the arc is connected to the middle of the cutting edge. The elastic membrane periodically depresses and bulges, driving the cutting edge to vibrate radially to dynamically cut the blood clots entering the suction hole;

[0012] An arc-shaped groove, which is arranged on the inner wall of the suction hole corresponding to the elastic membrane, and forms a sealed cavity with the elastic membrane;

[0013] A negative pressure node, which is arranged inside the tip and is connected to the sealed cavity. The negative pressure node generates negative pressure to adjust the periodic change of the air pressure in the sealed cavity, so as to drive the periodic deformation of the elastic membrane.

[0014] Preferably, a reset spring is arranged between the inner arc top of the elastic membrane and the arc bottom of the arc-shaped groove to enhance the ability of the elastic membrane to recover from deformation.

[0015] Preferably, a blocking rod is fixedly arranged on the inner arc top of the elastic membrane, and the blocking rod is used to block the communication channel between the sealed cavity and the negative pressure node.

[0016] Preferably, the cutting edge is arranged in a spiral shape along the hole wall of the suction hole.

[0017] Preferably, the cutting edge is arranged in a non-continuous truncated spiral shape, and the adjacent two segments of the cutting edge are arranged in a staggered and alternating manner.

[0018] Preferably, the middle of each segment of the cutting edge is fixedly arranged at the arc top of the elastic membrane at the corresponding position.

[0019] Preferably, diversion grooves are arranged in a circumferential array on the hole wall of the suction hole. The diversion grooves are arranged in a spiral shape, and the spiral direction is opposite to the spiral direction of the cutting edge.

[0020] Preferably, an air channel is arranged inside the tip. The air inlet of the air channel is located at the feeding port of the suction hole, and the air outlet is communicated with the inside of the tube body. Hydrophobic membranes are arranged at both the air inlet and the air outlet of the air channel, so that only gas can pass through the air channel.

[0021] Preferably, the air channel includes at least one tapered channel. The channel area of the tapered channel gradually decreases from the air inlet end to the air outlet end, and the negative pressure node is located at the air outlet end of the tapered channel.

[0022] Preferably, a support ring is fixedly connected to the outer wall of the tapered section. The support ring is arranged in a convex shape, and the vertex of the convexity is higher than the feeding port of the suction hole.

[0023] In the above technical solution, a simple suction tube for removing blood clots in upper gastrointestinal bleeding provided by the present invention has the following beneficial effects:

[0024] Through the provided elastic membrane and cutting edges, the present invention generates periodic negative pressure through negative pressure nodes, thereby driving the periodic deformation of the elastic membrane, which in turn drives the radial vibration of the cutting edges within the suction holes. The radial vibration forces the tips of the cutting edges to periodically chisel into the dense layer of the blood clot. Each vibration impact forms microcracks on the surface of the blood clot, and the vibration energy is transmitted to the interior of the blood clot, destroying the fibrin cross-linked structure, thus making the blood clot break more thoroughly, effectively reducing the fragment size, further preventing the occurrence of blockage phenomena, saving the time for the blockage clearing process, and the vibration direction forms a superposition with the axial movement of the suction tube, generating multi-directional shear stress within the blood clot, thereby achieving dynamic cutting. Compared with static cutting, it effectively improves the fragmentation efficiency of the blood clot and the clearance efficiency of upper gastrointestinal blood clots. At the same time, the radial vibration induces local turbulence around the suction holes, keeping the fragmented blood clot fragments in a suspended state, further avoiding deposition blockage. The blood clot fragments crushed by the cutting edges are accelerated by negative pressure within the inclined flow channels of the suction holes and enter the main channel of the tube body along a spiral trajectory, thus preventing secondary accumulation of fragments and effectively improving the anti-blocking performance of the suction tube and the blood clot clearance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a front view three-dimensional structure schematic diagram provided by an embodiment of the present invention;

[0027] Figure 2 It is an enlarged schematic diagram of Structure A provided by an embodiment of the present invention;

[0028] Figure 3 It is a rear view three-dimensional structure schematic diagram provided by an embodiment of the present invention;

[0029] Figure 4 It is a three-dimensional structure schematic diagram of the tip provided by an embodiment of the present invention;

[0030] Figure 5 It is an enlarged schematic diagram of Structure B provided by an embodiment of the present invention;

[0031] Figure 6 It is a cross-sectional structure schematic diagram provided by an embodiment of the present invention;

[0032] Figure 7 It is a partial structure cross-sectional schematic diagram provided by an embodiment of the present invention;

[0033] Figure 8 It is an enlarged schematic diagram of Structure C provided by an embodiment of the present invention;

[0034] Figure 9 Schematic diagram of the three-dimensional structure of the cutting edge provided by the embodiment of the present invention.

[0035] Explanation of reference numerals:

[0036] 1, tube body; 2, tip; 21, conical section; 22, cylindrical section; 3, suction hole; 31, diversion groove; 4, support ring; 5, cutting edge; 6, air passage; 7, arc-shaped groove; 8, elastic membrane. Detailed implementation manners

[0037] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] As Figures 1-9 shown, a simple suction tube for removing blood clots in upper gastrointestinal bleeding includes:

[0039] A tube body 1, which is driven by an external negative pressure source to aspirate the position of gastrointestinal bleeding and remove blood clots;

[0040] A tip 2, which is located at the entrance of the tube body 1. The tip 2 includes a conical section 21 and a cylindrical section 22;

[0041] Suction holes 3, which are inclined and arranged in a circumferential array inside the tip 2. The feed ports of the suction holes 3 are located at the connection between the conical section 21 and the cylindrical section 22;

[0042] A dynamic cutting unit, which is arranged in a circumferential array on the hole wall of the suction hole 3. The vibration cutting unit includes:

[0043] A cutting edge 5, which is arranged on the hole wall of the suction hole 3;

[0044] An elastic membrane 8, which is arranged in an arc-shaped membrane on the inner wall of the suction hole 3, and the top of the arc is connected to the middle of the cutting edge 5. The elastic membrane 8 periodically depresses and bulges, driving the radial vibration of the cutting edge 5 to dynamically cut the blood clots entering the suction hole 3;

[0045] An arc-shaped groove 7, which is arranged on the inner wall of the suction hole 3 at the corresponding position of the elastic membrane 8 and forms a sealed cavity with the elastic membrane 8;

[0046] A negative pressure node, which is arranged inside the tip 2 and communicated with the sealed cavity. The negative pressure node generates negative pressure to adjust the periodic change of the air pressure in the sealed cavity, so as to drive the periodic deformation of the elastic membrane 8.

[0047] Specifically, the tube body 1 is bound to the gastroscope, and the tip 2 is brought into the human body together with the gastroscope. Before the gastroscope reaches the stomach, it first drives the tip 2 to pass through the upper digestive tract together. When the gastroscope observes bleeding in the upper digestive tract, the external negative pressure source can be activated, and the blood clots at the bleeding position in the upper digestive tract are sucked into the tube body 1 through the suction holes 3 opened on the tip 2, and then the blood clots are discharged out of the body through the outlet of the tube body 1.

[0048] Furthermore, since there is mucosa on the inner wall of the upper digestive tract and the mucosa is relatively fragile, when the gastroscope drives the tip 2 to move in the upper digestive tract, the tip 2 is likely to scratch the mucosa of the upper digestive tract, thus causing damage to the patient. Therefore, the tip 2 is divided into two parts, a conical section 21 and a cylindrical section 22, and the two are axially connected. The tip of the conical section 21 is designed to be blunt to prevent the tip of the conical section 21 from scratching the mucosa of the patient's upper digestive tract during the movement. The cone angle of the conical section 21 is between 30° and 45°, so as to facilitate the formation of fluid convergence and guide the blood clots to move towards the suction holes 3.

[0049] Further, the feed port of the suction hole 3 is located at the connection between the conical section 21 and the cylindrical section 22. By forming an angle between the outer wall of the conical section 21 and the outer wall of the cylindrical section 22, part of the feed port of the suction hole 3 is opened on the outer wall of the conical section 21, and the other part is opened on the outer wall of the cylindrical section 22, so as to increase the opening area of the feed port of the suction hole 3, and thus be able to suck and remove blood clots of larger volume, reducing the probability of blockage of the feed port of the suction hole 3 when removing blood clots of larger volume.

[0050] Furthermore, since an angle is formed between the outer wall of the conical section 21 and the outer wall of the cylindrical section 22, the inlet part of the suction hole 3 is partially opened on the outer wall of the conical section 21 and the other part is opened on the outer wall of the cylindrical section 22. When the cylindrical section 22 is attached to the inner wall of the upper digestive tract, a gap is formed between the conical section 21 and the inner wall of the upper digestive tract. At this time, the inlet of the suction hole 3 located on the outer wall of the cylindrical section 22 is blocked, and the inlet of the suction hole 3 located on the outer wall of the conical section 21 can still form a stable suction channel to remove the blood clot on the inner wall of the upper digestive tract. When the conical section 21 is attached to the inner wall of the upper digestive tract, a gap is formed between the cylindrical section 22 and the inner wall of the upper digestive tract. At this time, the inlet of the suction hole 3 located on the outer wall of the conical section 21 is blocked, and the inlet of the suction hole 3 located on the outer wall of the cylindrical section 22 can still form a stable suction channel to remove the blood clot on the inner wall of the upper digestive tract. Therefore, through the angle design between the outer wall of the conical section 21 and the outer wall of the cylindrical section 22, and the suction holes 3 arranged in a circumferential array, a stable suction channel can be maintained, effectively preventing the tip 2 from adhering to the inner wall of the upper digestive tract, further reducing the probability of blockage of the inlet of the suction hole 3, and at the same time avoiding the complete adhesion and blockage of the inlet of the suction hole 3 to the inner wall of the upper digestive tract, resulting in pressure burden on the inner wall of the upper digestive tract during suction and avoiding damage to the inner wall of the upper digestive tract.

[0051] Furthermore, the blood clot enters the tube body 1 through the suction hole 3, and a spiral negative pressure field is formed through the inclined suction hole 3. The shear force is used to peel off the blood clot adhering to the digestive tract wall. At the same time, the inclination angle prevents the orifice from being completely blocked by a large blood clot. During the process of the blood clot entering the suction hole 3, periodic negative pressure is generated by the negative pressure node, thereby adjusting the air pressure in the sealing cavity and driving the elastic membrane 8 to change as follows:

[0052] The negative pressure node generates negative pressure, thereby sucking the gas in the sealing cavity through the communication channel with the sealing cavity, so that the air pressure in the sealing cavity decreases, so that the elastic membrane 8 deforms into a depression towards the arc-shaped groove 7, thereby driving the cutting edge 5 to move radially towards the hole wall of the suction hole 3 in the suction hole 3.

[0053] The negative pressure node returns to normal pressure, and the elastic membrane 8 recovers from deformation and bulges towards the direction away from the arc-shaped groove 7, thereby driving the cutting edge 5 to move radially towards the central axis direction of the suction hole 3 in the suction hole 3.

[0054] A periodic negative pressure is generated through a negative pressure node, thereby driving the elastic membrane 8 to deform periodically, and further driving the cutting edge 5 to vibrate radially within the suction hole 3. The radial vibration forces the tip of the cutting edge 5 to periodically penetrate into the dense layer of the blood clot. Each vibration impact forms microcracks on the surface of the blood clot, and the vibration energy is transmitted to the interior of the blood clot, destroying the fibrin cross-linked structure, thereby making the blood clot break more thoroughly, effectively reducing the fragment size, further preventing the occurrence of blockage phenomena, saving the time of the blockage clearing process, and the vibration direction is superimposed with the axial movement of the suction tube (gastroscope advancement), generating multi-directional shear stress within the blood clot, thereby realizing dynamic cutting. Compared with static cutting, the crushing efficiency of the blood clot and the clearing efficiency of the upper gastrointestinal blood clot are effectively improved. At the same time, the radial vibration induces local turbulence around the suction hole 3, keeping the fragmented blood clot fragments in a suspended state, further avoiding deposition blockage. The blood clot fragments crushed by the cutting edge 5 are accelerated by the negative pressure in the inclined flow channel of the suction hole 3 and enter the main channel of the tube body 1 along a spiral trajectory, thereby avoiding secondary accumulation of fragments and effectively improving the anti-blocking performance of the suction tube and the blood clot clearing efficiency.

[0055] It should be noted that the periodic negative pressure generated by the negative pressure node can be the intermittent suction of a vacuum pump, the cyclic suction of an air pump, or can be achieved by technical means not known to those skilled in the art.

[0056] As a further embodiment provided by the present invention, a return spring is provided between the inner arc top of the elastic membrane 8 and the arc bottom of the arc-shaped groove 7 to enhance the ability of the elastic membrane 8 to recover from deformation.

[0057] Specifically, by arranging a return spring between the inner arc top of the elastic membrane 8 and the arc bottom of the arc-shaped groove 7, when the negative pressure node generates a negative pressure, the gas in the sealed cavity is sucked through the communication channel with the sealed cavity, so that the air pressure in the sealed cavity decreases, causing the elastic membrane 8 to deform inwards towards the arc-shaped groove 7 and compressing the return spring to store elastic potential energy, thereby driving the cutting edge 5 to move radially towards the wall of the suction hole 3 within the suction hole 3. When the negative pressure node returns to normal pressure, the elastic membrane 8 recovers from deformation and bulges outwards away from the arc-shaped groove 7, thereby driving the cutting edge 5 to move radially towards the central axis of the suction hole 3 within the suction hole 3. The return spring recovers its elastic deformation, pushing the elastic membrane 8 to quickly recover from deformation, thereby increasing the vibration frequency of the cutting edge 5, enhancing the dynamic shear crushing efficiency and degree of fragmentation of the blood clot, and at the same time peeling off the debris attached to the surface of the cutting edge 5 during rapid vibration, thereby realizing the self-cleaning function of the cutting edge 5.

[0058] As a further embodiment provided by the present invention, a blocking rod is fixedly arranged on the inner arc top of the elastic membrane 8, and the blocking rod is used to block the communication channel between the sealed cavity and the negative pressure node.

[0059] Specifically, through the arranged blocking rod, when the elastic membrane 8 deforms into a depression towards the arc-shaped groove 7 and compresses the return spring to store elastic potential energy, the blocking rod moves synchronously and enters the communication channel between the sealing cavity and the negative pressure node. Under the negative pressure suction of the negative pressure node, the elastic membrane 8 is further pulled to continue to sink for a certain distance, and the return spring is compressed, thereby increasing the vibration amplitude of the cutting edge 5, enabling the cutting edge 5 to cut the blood clot more deeply, so as to achieve the improvement of the vibration frequency while ensuring the amplitude, thereby effectively improving the dynamic cutting effect on the blood clot.

[0060] As a further embodiment provided by the present invention, the cutting edge 5 is arranged in a spiral shape along the pore wall of the suction hole 3.

[0061] Specifically, by designing the cutting edge 5 to be arranged in a spiral shape along the pore wall of the suction hole 3, an asymmetric flow field is generated, thereby asymmetrically cutting and crushing the blood clot, avoiding long-range scratches on a single part of the blood clot. Coupled with the dynamic cutting of the cutting edge 5, the uniformity and crushing efficiency of the blood clot fragmentation are further improved.

[0062] As a further embodiment provided by the present invention, the cutting edge 5 is a discontinuous truncated spiral setting, and the adjacent two segments of the cutting edge 5 are arranged in a staggered and alternating manner.

[0063] Specifically, through the discontinuous truncated spiral setting, discrete stress concentration points are formed. The truncated cutting edge 5 breaks the flow field symmetry of the continuous spiral structure, forming local turbulence in the suction hole 3, enhancing the contact probability between the blood clot and the cutting edge. Thus, when the blood clot passes through the suction hole 3, it is impacted and cut multiple times instead of being cut continuously, reducing the risk of large blood clot jamming, and further reducing the probability of blood clot blockage.

[0064] Furthermore, the alternating layout of adjacent segments of the cutting edge 5 generates asymmetric shear forces, forcing the blood clot to continuously change direction on the movement path, thereby improving the fragmentation uniformity and the fragmentation effect of the blood clot. The alternating layout further increases the secondary vortex of the fluid, reduces the axial accumulation of the blood clot in the suction hole 3, and forms a wavy stress surface. When the suction tube accidentally contacts the mucosa, the pressure is dispersed to multiple discrete points, reducing the pressure per unit area and minimizing mucosal damage.

[0065] As a further embodiment provided by the present invention, the middle of each segment of the cutting edge 5 is fixedly arranged at the apex of the elastic membrane 8 at the corresponding position.

[0066] Specifically, through the dynamic cutting formed by each segment of the cutting edge 5, multi-directional cutting of the passing blood clot in different directions can be carried out, making the blood clot fragmentation more thorough, further improving the cutting efficiency and the fragmentation efficiency, shortening the passing time of the blood clot through the suction hole 3, and effectively improving the clearance efficiency.

[0067] As a further embodiment provided by the present invention, diversion grooves 31 are arranged in a circumferential array on the pore wall of the suction hole 3. The diversion grooves 31 are arranged in a spiral shape, and the spiral direction is opposite to the spiral direction of the cutting edge 5.

[0068] Specifically, the spiral-shaped diversion grooves 31 guide the blood clot to form a swirling flow with the fluid, increasing the contact frequency between the blood clot and the pore wall of the suction hole 3, thereby increasing the contact frequency with the cutting edge 5. Through the anti-spiral design, a bidirectional shearing force is formed. The swirl of the diversion grooves 31 mainly acts on the surface of the blood clot to peel off the loose part, and the cutting edge 5 exerts a concentrated stress on the core dense area, realizing progressive crushing from the surface to the inside, and significantly improving the crushing efficiency.

[0069] As a further embodiment provided by the present invention, an air passage 6 is opened in the tip 2. The air inlet of the air passage 6 is located at the feed port of the suction hole 3, and the air outlet is communicated with the inside of the tube body 1. Hydrophobic membranes are arranged at both the air inlet and the air outlet of the air passage 6, so that only gas can pass through the air passage 6.

[0070] As a further embodiment provided by the present invention, the air passage 6 includes at least one tapered channel. The channel area of the tapered channel gradually decreases from the air inlet port to the air outlet port, and the negative pressure node is located at the air outlet port of the tapered channel.

[0071] Specifically, when the blood clot enters the suction hole 3, since the flow channel of the suction hole 3 is filled, and the external negative pressure source continues to suck, part of the gas enters the air passage 6 through the air inlet of the air passage 6 and passes through the tapered channel. Since the channel area of the tapered channel gradually decreases from the air inlet port to the air outlet port, following the principle that the flow rate is small at the large cross-section and large at the small cross-section, the air flow accelerates in the tapered channel and generates negative pressure at the outlet. Since the negative pressure node is located at the air outlet port of the tapered channel, the negative pressure generated by the negative pressure node is adjusted, thereby sucking the gas in the sealing cavity, causing the air pressure in the sealing cavity to drop, so that the elastic membrane 8 deforms into a concave shape towards the arc-shaped groove 7, thereby driving the cutting edge 5 to move radially towards the pore wall of the suction hole 3 in the suction hole 3. When the blood clot moves in the suction hole 3 and is cut, a gap is generated in the flow channel of the suction hole 3. At this time, the air entering the air passage 6 decreases, and the negative pressure formed is not sufficient to maintain the concave deformation of the elastic membrane 8. The elastic membrane 8 recovers its deformation, driving the cutting edge 5 to move radially towards the central axis direction of the suction hole 3 in the suction hole 3. The external negative pressure source continues to suck the blood clot through the gap generated in the flow channel of the suction hole 3 to fill the flow channel of the suction hole 3 again, thereby realizing the periodic negative pressure change of the negative pressure node, driving the cutting edge 5 to vibrate radially, and realizing dynamic cutting without an additional driving source to drive the negative pressure node to realize the periodic negative pressure change.

[0072] As a further embodiment provided by the present invention, a support ring 4 is fixedly connected to the outer wall of the conical section 21. The support ring 4 is provided in a convex shape, and the apex of the convexity is higher than the feed port of the suction hole 3.

[0073] Specifically, the support ring 4 provided can keep a gap between the feed port of the suction hole 3 and the mucous membrane all the time, further avoiding damage to the mucous membrane. Through the cleaning tube arranged at the end of the tube body 1, cleaning liquid can be injected through the cleaning tube to disinfect and clean the interior.

[0074] Only some exemplary embodiments of the present invention are described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A simple suction tube for removing blood clots in upper gastrointestinal bleeding, characterized in that, Comprising: A tube body, which is driven by an external negative pressure source to aspirate the gastrointestinal bleeding position and remove blood clots; A tip, which is located at the entrance of the tube body, and the tip includes a conical section and a cylindrical section; Suction holes, which are obliquely arranged in a circumferential array inside the tip, and the feed ports of the suction holes are located at the connection between the conical section and the cylindrical section; A dynamic cutting unit, which is arranged in a circumferential array on the hole wall of the suction hole, and the vibration cutting unit includes: Cutting edges, which are arranged on the hole wall of the suction hole; An elastic membrane, which is arranged in an arc shape on the inner wall of the suction hole, and the top of the arc is connected to the middle of the cutting edge. The elastic membrane periodically depresses and protrudes, driving the cutting edge to vibrate radially to dynamically cut the blood clots entering the suction hole; Arc-shaped grooves, which are arranged on the inner wall of the suction hole corresponding to the elastic membrane, and form a sealed cavity with the elastic membrane; Negative pressure nodes, which are arranged inside the tip and communicated with the sealed cavity. The negative pressure nodes generate negative pressure to adjust the periodic change of the air pressure in the sealed cavity, so as to drive the periodic deformation of the elastic membrane.

2. The simple aspirator tube for removing blood clots in upper gastrointestinal bleeding according to claim 1, characterized in that, A return spring is arranged between the inner arc top of the elastic membrane and the arc bottom of the arc-shaped groove to enhance the ability of the elastic membrane to recover from deformation.

3. The simple aspirator tube for removing blood clots in upper gastrointestinal bleeding according to claim 2, characterized in that, A blocking rod is fixedly arranged on the inner arc top of the elastic membrane, and the blocking rod is used to block the communication channel between the sealed cavity and the negative pressure node.

4. The simple suction tube for removing blood clots in upper gastrointestinal bleeding according to claim 3, characterized in that, The cutting edges are arranged in a spiral shape along the hole wall of the suction hole.

5. The simple suction tube for clearing blood clots in upper gastrointestinal bleeding according to claim 4, wherein, The cutting edges are arranged in a discontinuous truncated spiral shape, and the cutting edges of adjacent two segments are arranged in a staggered and alternating manner.

6. The simple aspirator tube for removing blood clots in upper gastrointestinal bleeding according to claim 5, wherein, The middle of each cutting edge is fixedly arranged at the arc top of the elastic membrane at the corresponding position.

7. The simple suction tube for removing blood clots in upper gastrointestinal bleeding according to claim 6, characterized in that, Flow guiding grooves are arranged in a circumferential array on the hole wall of the suction hole. The flow guiding grooves are arranged in a spiral shape, and the spiral direction is opposite to the spiral direction of the cutting edges.

8. The simple aspirating tube for removing blood clots in upper gastrointestinal bleeding according to claim 1, characterized in that, An air duct is arranged inside the tip. The air inlet of the air duct is located at the feed port of the suction hole, and the air outlet is communicated with the inside of the tube body. Hydrophobic membranes are arranged at both the air inlet and the air outlet of the air duct, so that only gas can pass through the air duct.

9. The simple suction tube for clearing blood clots in upper gastrointestinal bleeding according to claim 8, characterized in that, The air duct includes at least one conical channel, and the channel area of the conical channel gradually decreases from the air inlet port to the air outlet port. The negative pressure node is located at the air outlet port of the conical channel.

10. The simple suction tube for clearing blood clots in upper gastrointestinal bleeding according to claim 1, characterized in that, A support ring is fixedly connected to the outer wall of the conical section. The support ring is arranged in a convex shape, and the vertex of the convexity is higher than the feed port of the suction hole.

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