Intragastric hematocele suction device and method

Abstract

This invention relates to a device and method for aspirating hemorrhage from the stomach. The device includes a guide tube with an axially arranged suction chamber and an auxiliary chamber. One end of the suction chamber is fitted with a plug that communicates with it. The plug has several microporous rings penetrating its inner and outer circumference. The other end of the suction chamber is connected to a negative pressure unit. The auxiliary chamber is axially arranged on the wall of the suction chamber. One end of the auxiliary chamber extends into the end of the suction chamber and is connected to an impedance sensor. The other end is connected to an auxiliary flushing unit. The negative pressure unit and the auxiliary flushing unit are also electrically connected to a control module. The control module is electrically connected to the impedance sensor and the microporous rings and is used to trigger pulsed expansion of the microporous rings based on the impedance signal from the impedance sensor. Through pulsed expansion of the microporous rings, combined with reverse flushing by the auxiliary flushing unit, the device of this invention can achieve dual unblocking through both expansion and flushing, improving operational continuity.

Description

Technical Field

[0001] This invention belongs to the field of gastrointestinal endoscopy technology, specifically relating to a device and method for aspirating blood accumulated in the stomach. Background Technology

[0002] Upper gastrointestinal bleeding is a common clinical emergency. Blood accumulation and clots in the stomach not only severely impair the endoscopic view, interfering with lesion localization and treatment procedures, but can also induce serious complications such as aspiration and suffocation. In emergency endoscopy or intensive care settings, rapid and efficient removal of blood from the stomach is crucial for ensuring safe diagnosis and treatment.

[0003] Currently, clinical practice mainly relies on the suction system integrated into the endoscope to clear blood from the stomach. This system typically uses a single suction port at the tip of the endoscope, connected to a central negative pressure device via an operating handle to achieve suction. However, this system has the following drawbacks: The suction port has a small diameter and a single channel, making it prone to blockage when faced with a large amount of fresh blood or existing blood clots. This can lead to interrupted suction, difficulty in removing large amounts of accumulated blood in a short time, low suction efficiency, prolonged operation time, and increased patient risk.

[0004] Lacking warning and self-cleaning capabilities, once an adsorption blockage occurs, the endoscope must be removed for flushing or the equipment replaced, interrupting the treatment process and posing certain risks to the patient. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention aims to provide a device and method for aspirating blood from the stomach, which effectively avoids the problem of blockage during gastroscopy through a dual approach of pulsed dilation and flushing.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A device for aspirating hemorrhage in the stomach includes a guiding catheter with an axially arranged suction chamber and an auxiliary chamber. One end of the suction chamber is fitted with a plug that communicates with it. The plug has a microporous ring penetrating its inner and outer circumference. The other end of the suction chamber is connected to a negative pressure unit. The auxiliary chamber is axially arranged on the wall of the suction chamber. One end of the auxiliary chamber extends into the end of the suction chamber and is connected to an impedance sensor, while the other end is connected to an auxiliary flushing unit. The negative pressure unit and the auxiliary flushing unit are also electrically connected to a control module. The control module is electrically connected to the impedance sensor and the microporous ring, and is used to trigger pulse expansion of the microporous ring based on the impedance signal from the impedance sensor.

[0007] Furthermore, a flow-disrupting component is provided on the inner circumference of the end of the suction cavity adjacent to the plug.

[0008] Furthermore, the turbulence assembly includes turbulence ribs, a plurality of which are spirally distributed along the inner circumferential axis of the suction cavity tube, with one end connected to the inner circumference of the suction cavity tube and the other end extending toward the axis of the suction cavity tube.

[0009] Furthermore, the plug also includes a conical blind cylinder and a silicone layer. The conical blind cylinder is embedded at the end of the suction cavity tube, with its small open end communicating with the suction cavity tube and its large closed end facing the end of the suction cavity tube. The silicone layer covers the outer periphery of the conical blind cylinder, and the microporous ring is disposed on the large end face of the conical blind cylinder and penetrates the silicone layer, communicating with the suction cavity tube.

[0010] Furthermore, the microporous ring is a shape memory alloy ring.

[0011] Furthermore, the end of the guiding conduit is provided with a camera component and a lighting component, both of which are electrically connected to the control module.

[0012] Furthermore, a water vapor pipe is also provided axially along the guide conduit.

[0013] Furthermore, the auxiliary flushing unit includes a liquid storage tank, a solenoid valve, and a pressure pump, which are connected in series. The solenoid valve is connected to the other end of the auxiliary cavity tube.

[0014] The present invention also provides a method for aspirating blood from the stomach, using the aforementioned aspiration device, the method comprising: One end of the guiding catheter is placed into the area of ​​blood accumulation in the stomach, the other end of the suction tube is connected to the negative pressure unit, and the other end of the auxiliary tube is connected to the auxiliary flushing unit. The suction tube is activated to perform negative pressure suction. Blood and fluid in the stomach enter the suction tube through the plug and flow out through the turbulence component.

[0015] Furthermore, the method also includes: Real-time monitoring of the impedance value of the impedance sensor; If the impedance value is less than the impedance threshold, it is determined that a blockage has occurred; If the impedance value returns to the normal range, the blockage is resolved; If a blockage occurs, the control module controls the microporous ring to undergo pulse deformation, and simultaneously activates the auxiliary flushing unit to flush the blockage and remove the blockage.

[0016] Because the present invention adopts the above technical solution, it has the following advantages and effects: This invention provides a gastric blood aspiration device and method that uses an impedance sensor to monitor the conductivity (impedance value change) of the liquid near the aspiration orifice in real time. The control module sets dual judgment criteria of impedance threshold and flow rate threshold, which can identify the blockage in the early stage (when the blood clot has just formed or when there is partial blockage) in time, avoiding complete blockage and interruption of aspiration. Compared with the traditional passive judgment that relies on visual observation or sudden drop in negative pressure, the response time is shortened. In addition, the microporous ring actively expands the orifice diameter under the control signal, and with the reverse flushing of the auxiliary flushing unit, it achieves dual unblocking of the blockage by expanding the diameter and flushing, which greatly improves the continuity of operation and improves the efficiency of examination. Attached Figure Description

[0017] Figure 1 This is an isometric structural schematic diagram of the device of the present invention.

[0018] Figure 2 This is a front view of the device of the present invention.

[0019] Figure 3 This is a top view of the device of the present invention.

[0020] Figure 4 yes Figure 2 A magnified diagram of AA.

[0021] Figure 5 yes Figure 3 A magnified schematic diagram of part B.

[0022] Figure 6 This is a schematic diagram of the exploded structure of the device of the present invention.

[0023] Figure 7 yes Figure 6 A magnified schematic diagram of the interior of a portion of C.

[0024] Figure 8 yes Figure 7 A magnified schematic diagram of a portion of the image.

[0025] Figure 9 This is a schematic diagram of the isometric structure of the microporous ring of the device of the present invention.

[0026] Figure 10 This is a cross-sectional view of the microporous ring structure of the device of the present invention.

[0027] The attached diagram is labeled as follows: 1-Guiding catheter; 11-Suction cavity; 111-Break rib; 12-Auxiliary cavity; 13-Camera assembly; 14-Water and gas tube; 15-Illumination assembly; 16-Biopsy channel; 2-Handle; 3-Plug; 31-Conical blind tube; 32-Microporous ring. Detailed Implementation

[0028] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings to provide a clearer understanding of the purpose, features, and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative of the essential spirit of the technical solution of the present invention.

[0029] like Figures 1-8 As shown. The present invention provides a gastric blood aspiration device, including a guide catheter 1, a negative pressure unit, an auxiliary flushing unit and a control module, wherein a handle 2 is provided at the tail end of the guide catheter 1.

[0030] The guiding catheter 1 has an axially arranged suction lumen 11 and an auxiliary lumen 12. One end of the suction lumen 11 is fitted with a plug 3 that communicates with it. The upper surface of the plug 3 has multiple suction holes penetrating its inner and outer circumferences, and each suction hole contains a microporous ring 32. The auxiliary lumen 12 is axially arranged on the wall of the suction lumen 11. One end of the auxiliary lumen 12 extends into the end of the suction lumen 11 and is connected to an impedance sensor. The other end of the suction lumen 11 is connected to a negative pressure unit, and the other end of the auxiliary lumen is connected to an auxiliary flushing unit. The control module is electrically connected to the negative pressure unit for aspirating blood clots and fluid from the stomach, and to the auxiliary flushing unit for flushing the plug. The control module is also electrically connected to the impedance sensor and the microporous ring 32, and is used to trigger pulsed expansion of the microporous ring 32 based on the impedance signal from the impedance sensor.

[0031] Specifically, the guiding catheter 1 is made of medical-grade polyurethane, and its length can be set according to clinical needs. The suction lumen 11 and the auxiliary lumen 12 are arranged axially parallel, with the suction lumen 11 as the main lumen and the auxiliary lumen 12 as the secondary lumen. The guiding catheter 1 extends from the tail ends of both the suction lumen 11 and the auxiliary lumen 12.

[0032] One end of the suction chamber 11 is connected to a negative pressure unit via a quick connector, which provides suction negative pressure. The negative pressure unit is preferably a negative pressure pump. The negative pressure pump can be connected to the tail end of the suction chamber 11. One end of the auxiliary chamber 12 is connected to an auxiliary flushing unit via a quick connector. Multiple auxiliary chambers 12 are arranged in a circumferential array along the suction chamber 11, and impedance sensors are disposed at the ends of one or more auxiliary chambers.

[0033] The control module uses an STM32 series microcontroller. The impedance sensor is a resistive sensor, with its detection electrode positioned near the plug 3, preferably 5-10 mm from the end of the plug 3. The impedance sensor is electrically connected to the control module, sending the detected liquid conductivity to the control module. The control module determines the blockage status at the end of the suction chamber 11 based on changes in conductivity.

[0034] Furthermore, the guide catheter 1 is also provided with a biopsy channel 16 along its axis, and the tail end of the biopsy channel 16 is led out from the outer periphery of the tail end of the guide catheter 1.

[0035] Furthermore, a flow-disrupting component is provided on the inner circumference of the end of the suction cavity tube 11 adjacent to the plug 3. The flow-disrupting component includes several flow-disrupting ribs 111, which are made of polyurethane material integrally molded with the suction cavity tube 11. The flow-disrupting ribs 111 are spirally distributed along the inner circumferential axis of the suction cavity tube 11, with one end connected to the inner circumference of the suction cavity tube 11 and the other end extending towards the axis of the suction cavity tube 11. The cross-section of the flow-disrupting ribs 111 is an elliptical or circular arc surface, and its length is less than 1 / 3 to 1 / 2 of the inner diameter of the suction cavity tube 11. By providing asymmetrical spiral flow-disrupting ribs on the inner wall of the suction cavity tube 11, spiral flow of blood can be induced, enhancing the shear force within the tube, effectively delaying blood cell sedimentation and blood clot adhesion, and significantly reducing the probability of blockage.

[0036] Furthermore, a camera assembly 13 and an illumination assembly 15 are also provided at the end of the guide tube 1. The camera assembly 13 includes a miniature camera with a waterproof rating of at least IP67. The miniature camera is axially embedded in the end of the guide tube 1. The illumination assembly 15 includes an LED light source, which is embedded in the end of the guide tube 1 adjacent to the camera assembly 13, providing illumination for the camera assembly 13. The camera assembly 13 and the illumination assembly 15 are electrically connected to the control module via wires inside the handle 2. The handle 2 is provided with a communication interface that can be connected to a display device to output images.

[0037] Furthermore, a water-air tube 14 is also provided axially along the guiding catheter 1. One end of the water-air tube 14 extends out of the guiding catheter 1. The end of the water-air tube 14 extending out of the guiding catheter 1 can be connected to a source of rinsing fluid or a source of air. The water-air tube 14 includes a water supply tube and an air supply tube. The water supply tube delivers rinsing fluid to clean and expand the gastric mucosa, while the air supply tube delivers gas to expand the gastric cavity, improving the effectiveness and comfort of the examination.

[0038] Furthermore, the auxiliary flushing unit includes a reservoir, a solenoid valve, and a pressure pump. The reservoir stores physiological saline flushing solution. The pressure pump is preferably a miniature peristaltic pump, and the solenoid valve is preferably a normally closed solenoid valve. The reservoir, pressure pump, and solenoid valve are connected in series, with the solenoid valve connected to the tail end of the auxiliary chamber tube. Flushing solution is pumped into the auxiliary chamber tube 12 via the pressure pump.

[0039] like Figures 9-10As shown. Further, the plug 3 also includes a conical blind cylinder 31 and a silicone layer. The conical blind cylinder 31 is embedded at the end of the suction cavity 11. The conical blind cylinder 31 is made of medical-grade 316L stainless steel. The small open end of the conical blind cylinder 31 communicates with the suction cavity 11, while the large closed end faces the outer end of the suction cavity 11. The end face of the large end of the conical blind cylinder 31 is basically flush with the end face of the suction cavity 11. The silicone layer covers the outer periphery of the conical blind cylinder 31, and the thickness of the silicone layer is 0.5-1.0 mm. A microporous ring 32 is embedded in the end face of the large end of the conical blind cylinder 31 and penetrates the silicone layer, communicating with the inner periphery of the suction cavity 11. The number of microporous rings 32 is preferably 6-8, arranged in a ring array.

[0040] Furthermore, the microporous ring 32 is a ring-shaped shape memory alloy ring, preferably made of nickel-titanium shape memory alloy material, with a phase transition temperature of approximately 50°C. Initially, the microporous ring 32 is in the martensitic phase, with its pore size reduced. When heated to above the phase transition temperature, the microporous ring 32 undergoes a phase transition, and its pore size expands in a pulsed manner. The microporous ring 32 is electrically connected to the control module via wires.

[0041] During the suction process, the impedance sensor monitors the change in conductivity at the front end of the suction cavity 11 in real time, and judges the blockage phenomenon in combination with the suction flow. If blockage occurs, the control module triggers the microporous ring 32 to expand in a pulsed manner.

[0042] The present invention also provides a method for aspirating blood from the stomach, using the blood aspiration device of the present invention, the method comprising the following steps: Step S1, device preparation: The operator holds handle 2 and inserts the guiding catheter 1 into the patient's stomach through the mouth or nose, positioning the end of the plug 3 in the area of ​​blood accumulation. One end of the suction tube 11 is connected to the negative pressure unit, and one end of the auxiliary tube 12 is connected to the auxiliary flushing unit.

[0043] Step S2, negative pressure suction: When the negative pressure unit is turned on, the suction tube 11 is controlled to perform negative pressure suction. Blood clots and fluid in the stomach enter the suction tube 11 through the microporous ring 32 on the plug 3. Under the induction of the turbulence component, a spiral flow is formed and flows out with the fluid, greatly reducing the probability of blockage.

[0044] Step S3, Real-time monitoring: An impedance sensor detects the impedance value inside the suction cavity 11, and the control module collects and monitors the impedance value and the negative pressure value of the suction cavity 11 in real time (detected by a negative pressure sensor).

[0045] Step S4, determine blockage: The control module determines whether a blockage has occurred; First judgment condition: If the impedance value is less than the impedance threshold, then a blockage is judged to have occurred; The second judgment condition: If the negative pressure value is less than the negative pressure threshold, it is also judged that a blockage has occurred.

[0046] Step S5, anti-blocking treatment: When the control module detects a blockage, it performs the following anti-blockage operation; The auxiliary flushing unit is activated, the solenoid valve is opened, and the pressure pump operates. Physiological saline flushing solution is output in a pulsed manner through the auxiliary chamber tube 12 at a certain pressure to flush the end of the plug 3. Each flushing time is 3-5 seconds. At the same time, the control module triggers the microporous ring 32 to act, and pulsed discharge is performed on the microporous ring 32 for 2-3 seconds each time. This raises the temperature of the microporous ring 32 to the phase transition temperature. The pore size of the microporous ring 32 instantly deforms, expands, and resets to form a pulsed expansion, thereby loosening the blockage. Continue to maintain negative pressure suction so that the blockage is removed by the combined action of flushing and deformation of the microporous ring 32.

[0047] Step S6, Restore Judgment: After the anti-blocking treatment, the control module continues to monitor the impedance value and negative voltage value; If the impedance value returns to the normal range and the negative pressure returns to the normal value, then the blockage is considered to have been cleared.

[0048] If the blockage cannot be cleared after three consecutive anti-blocking attempts, the control module will issue an audible and visual alarm, prompting the operator to handle the situation manually.

[0049] Step S7, repeat the process: The device continues to operate under normal suction conditions. When a blockage is detected again, steps S4-S6 are repeated.

Claims

1. A device for aspirating blood accumulated in the stomach, characterized in that, The device includes a guide tube (1), which has an axially arranged suction chamber (11) and an auxiliary chamber (12). One end of the suction chamber (11) is fitted with a plug (3) that communicates with it. The plug (3) is provided with a plurality of microporous rings (32) that circumferentially penetrate its inner and outer circumference. The other end of the suction chamber (11) is connected to a negative pressure unit. The auxiliary chamber (12) is arranged axially along the wall of the suction chamber (11). One end of the auxiliary chamber (12) extends into the end of the suction chamber (11) and is connected to an impedance sensor. The other end is connected to an auxiliary flushing unit. The negative pressure unit and the auxiliary flushing unit are also electrically connected to a control module. The control module is electrically connected to the impedance sensor and the microporous rings (32) and is used to trigger the pulse expansion of the microporous rings (32) according to the impedance signal of the impedance sensor.

2. The gastric blood suction device according to claim 1, characterized in that, A flow-disrupting component is provided on the inner circumference of the end of the suction cavity tube (11) adjacent to the plug (3).

3. The gastric blood suction device according to claim 2, characterized in that, The turbulence assembly includes turbulence ribs (111), a plurality of turbulence ribs (111) are spirally distributed along the inner circumferential axis of the suction cavity tube (11), and one end of each rib is connected to the inner circumference of the suction cavity tube (11), and the other end extends toward the axis of the suction cavity tube (11).

4. The gastric blood suction device according to any one of claims 1-3, characterized in that, The plug (3) also includes a conical blind cylinder (31) and a silicone layer. The conical blind cylinder (31) is embedded at the end of the suction cavity tube (11) and its small open end is connected to the suction cavity tube (11), while its large closed end faces the end of the suction cavity tube (11). The silicone layer covers the outer periphery of the conical blind cylinder (31). The microporous ring (32) is disposed on the large end face of the conical blind cylinder (31) and penetrates the silicone layer and is connected to the suction cavity tube (11).

5. The gastric blood suction device according to claim 4, characterized in that, The microporous ring (32) is a shape memory alloy ring.

6. The gastric blood suction device according to claim 5, characterized in that, The end of the guide tube (1) is provided with a camera component (13) and a lighting component (15), both of which are electrically connected to the control module.

7. The gastric blood suction device according to claim 6, characterized in that, The guide tube (1) is also provided with a water vapor tube (14) along its axial direction.

8. The gastric blood suction device according to claim 7, characterized in that, The auxiliary flushing unit includes a liquid storage tank, a solenoid valve, and a pressure pump. The liquid storage tank, the pressure pump, and the solenoid valve are connected in series. The solenoid valve is connected to the other end of the auxiliary cavity tube (12).

9. A method for aspirating hemorrhage from the stomach, using the aspirator for aspirating hemorrhage from the stomach as described in any one of claims 1-8, characterized in that, The method includes: One end of the guiding catheter (1) is placed into the area of ​​blood accumulation in the stomach, the other end of the suction tube (11) is connected to the negative pressure unit, and the other end of the auxiliary tube (12) is connected to the auxiliary flushing unit. The suction tube (11) is activated to perform negative pressure suction. Blood and fluid in the stomach enter the suction tube (11) through the plug (3) and flow out through the turbulence assembly.

10. The method for aspirating blood from the stomach according to claim 9, characterized in that, The method further includes: Real-time monitoring of the impedance value of the impedance sensor; If the impedance value is less than the impedance threshold, it is determined that a blockage has occurred; If the impedance value returns to the normal range, the blockage is resolved; If a blockage occurs, the control module controls the microporous ring (32) to undergo pulse deformation, and simultaneously starts the auxiliary flushing unit to flush the blockage (3) to remove the blockage.

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