Coaxial irrigation and suction irrigator

Abstract

The present invention discloses a coaxial irrigation and suction irrigator, comprising a suction line for drawing in liquid and a flushing line for flushing out liquid. The proximal end of the suction line is connected to a negative pressure suction device, while the proximal end of the flushing line is connected to an infusion device. The distal ends of the suction and flushing lines are coaxial, forming a circulating vortex structure in which, when both lines operate simultaneously, liquid flushed out from the distal end of the flushing line flows into the suction line. This invention can reduce the outflow of irrigation fluid and reduce the risk of infection.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, in particular to a coaxial flushing and suction irrigator. Background Art

[0002] The irrigation and suction device is used to clean blood, tissue, etc. from wounds during surgery or to care for and clean wounds, natural cavities of the human body, etc. Traditional irrigation and suction devices are side-by-side irrigation and suction devices, with one tube for irrigation and one tube for aspiration. They can only be flushed and aspirated separately, not at the same time, or the single-tube separate irrigation and aspiration function cannot control the rapid suction to achieve balance after the irrigation fluid is flushed out. This can easily cause more irrigation fluid in the area that needs to be flushed, and there is a possibility of infiltrating sterile surgical sheets and surgical gowns, widening the scope of contamination, increasing the risk of infection, or flowing into natural cavities to harm the human body.

[0003] How to solve the above problems has become a technical problem that needs to be solved urgently. Summary of the Invention

[0004] The object of the present invention is to provide a coaxial flushing and suction irrigator that can reduce the outflow of irrigating fluid and lower the risk of infection.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The coaxial flushing and suction irrigator provided by the present invention includes a suction pipeline for sucking liquid and a flushing pipeline for flushing liquid. The proximal end of the suction pipeline is connected to a negative pressure suction device, and the proximal end of the flushing pipeline is connected to an infusion device. The distal end of the suction pipeline and the distal end of the flushing pipeline are coaxial to form a circulating vortex structure in which the liquid flushed out from the distal end of the flushing pipeline flows into the suction pipeline when the two work simultaneously.

[0007] Furthermore, the suction pipeline includes a suction tube, and a flushing and suction joint is provided at the junction of the proximal end of the suction pipeline and the proximal end of the flushing pipeline. The distal end of the flushing and suction joint is connected to the proximal end of the suction tube. The proximal end of the flushing and suction joint is a forked structure and its ends are respectively a flushing inlet and a suction inlet. The suction tube, the flushing and suction joint, and the suction inlet are connected in sequence to form a suction pipeline, and the suction inlet is connected to a negative pressure suction device. A suction pressure control valve is provided at one end of the flushing and suction joint near the suction inlet, and a flushing tube is sleeved inside the suction tube. The distal end of the flushing tube is coaxial with the distal end of the suction tube and the proximal end of the flushing tube extends to the flushing inlet and is connected to a catheter joint with two ends passing through. The catheter joint is connected to the flushing inlet near one end of the flushing tube. The flushing tube and the catheter joint are connected to form a flushing pipeline, and the catheter joint (8) is connected to the infusion device at one end away from the flushing tube.

[0008] Furthermore, the suction pipeline includes a suction tube and a flushing and suction joint. The flushing and suction joint is a tubular structure whose interior is divided into two upper and lower chambers that are not connected to each other. The distal end of the flushing and suction joint is connected to the proximal end of the suction tube and a sealing cap is provided at the proximal end of the flushing and suction joint. A suction inlet is provided on the tube wall of the flushing and suction joint. The suction tube, the upper chamber, and the suction inlet are connected in sequence to form a suction pipeline, and the suction inlet is connected to the negative pressure suction device. In addition, a flushing inlet is also provided on the tube wall of the flushing and suction joint. A flushing tube is sleeved inside the suction tube. The distal end of the flushing tube is coaxial with the distal end of the suction tube and the proximal end of the flushing tube extends into the lower chamber. The flushing tube, the lower chamber, and the flushing inlet are connected in sequence to form a flushing pipeline, and the flushing inlet is connected to the infusion device.

[0009] Furthermore, a plurality of small holes are provided on the distal end wall of the suction tube, and the small holes are linearly arranged or circumferentially distributed along the central axis of the suction tube.

[0010] Furthermore, the suction tube is provided with a bending control device, which is a traction line with one end connected to the outer wall of the suction tube, and the other end of the traction line is connected to the flushing and suction joint or is a free end.

[0011] Furthermore, the flushing pipeline includes a flushing tube, and a flushing and suction joint is provided at the junction of the proximal end of the suction pipeline and the proximal end of the flushing pipeline, the distal end of the flushing and suction joint is connected to the proximal end of the flushing tube, the proximal end of the flushing and suction joint is a forked structure and its ends are respectively a flushing inlet and a suction inlet, the flushing tube, the flushing joint and the flushing inlet are connected in sequence to form a flushing pipeline, and the flushing inlet is connected to the infusion equipment, and, a suction tube is provided inside the flushing tube, the distal end of the flushing tube is coaxial with the distal end of the suction tube and the proximal end of the suction tube extends to the suction inlet and is connected to a catheter joint with one end through, the catheter joint is connected to the suction inlet near one end of the suction tube, the suction tube is connected to the catheter joint to form a suction pipeline, and the catheter joint is connected to the negative pressure suction equipment away from one end of the suction tube.

[0012] Furthermore, the flushing pipeline includes a flushing tube and a flushing and suction joint. The flushing and suction joint is a tubular structure whose interior is divided into two upper and lower chambers that are not connected to each other. The distal end of the flushing and suction joint is connected to the proximal end of the flushing tube and a sealing cap is provided at the proximal end of the flushing and suction joint. A flushing inlet is provided on the tube wall of the flushing and suction joint. The flushing tube, the upper chamber, and the flushing inlet are connected in sequence to form a flushing pipeline, and the flushing inlet is connected to the infusion device. In addition, a suction inlet is also provided on the tube wall of the flushing and suction joint. A suction tube is sleeved inside the flushing tube. The distal end of the suction tube is coaxial with the distal end of the flushing tube and the proximal end of the suction tube extends into the lower chamber. The suction tube, the lower chamber, and the suction inlet are connected in sequence to form a suction pipeline, and the suction inlet is connected to the negative pressure suction device.

[0013] Furthermore, a plurality of small holes are provided on the distal end wall of the flushing tube, and the small holes are linearly arranged or circumferentially distributed along the central axis of the flushing tube.

[0014] Furthermore, the flushing tube is provided with a bending control device, which is a traction line with one end connected to the outer wall of the suction tube, and the other end of the traction line is connected to the flushing and suction joint or is a free end.

[0015] Due to the adoption of the above structure, the present invention has the following beneficial effects:

[0016] The present invention forms a circulating vortex structure by making the distal end of the suction pipeline coaxial with the distal end of the flushing pipeline and making the suction and flushing work at the same time. During operation, the irrigation fluid in the infusion device is flushed out along the flushing pipeline to clean the wound, and the liquid after cleaning the wound flows back along the suction pipeline under the suction of the negative pressure suction device. Due to the influence of the flushing pressure and the suction force at the same time, a circulating vortex phenomenon will occur at the distal ends of the suction pipeline and the flushing pipeline, in which the liquid flows from the distal end of the suction pipeline to the distal end of the flushing pipeline, thereby preventing the irrigation fluid from flowing out and contaminating equipment such as bed sheets and surgical instruments, reducing the risk of infection, and the cleaning effect is better than the traditional side-by-side flushing technology, saving cleaning time.

[0017] The present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, which are used to illustrate embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic structural diagram of embodiment 2 of the present invention;

[0021] Figure 3 This is a schematic structural diagram of embodiment 3 of the present invention;

[0022] Figure 4 This is a schematic structural diagram of a fourth embodiment of the present invention;

[0023] Figure 5 Schematic diagram of four control modes of the suction pressure control valve of the present invention;

[0024] Figure 6 Schematic diagram of different arrangements of small holes of the present invention;

[0025] Figure 7 Schematic diagrams of different forms of circulating vortex when the flushing tube of the present invention is sheathed in the suction tube;

[0026] Figure 8 Schematic diagrams of different forms of circulating vortex when the suction tube of the present invention is sheathed in the flushing tube. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] Example 1

[0029] Please refer to Figure 1 、 Figures 5 to 7 A coaxial flushing and suction irrigator includes a suction pipeline for sucking liquid and a flushing pipeline for flushing out liquid. The proximal end of the suction pipeline is connected to a negative pressure suction device, and the proximal end of the flushing pipeline is connected to an infusion device. The distal end of the suction pipeline and the distal end of the flushing pipeline are coaxial to form a circulating vortex structure in which the liquid flushed out from the distal end of the flushing pipeline flows into the suction pipeline when the two work at the same time.

[0030] Specifically, the circulating vortex structure refers to a structure in which, when the suction pipeline and the flushing pipeline are working simultaneously, the liquid is flushed out from the far end of the flushing pipeline and is affected by the suction force of the far end of the suction pipeline and flows back into the suction pipeline, thereby causing a circulating vortex phenomenon in the liquid at the far end of the suction pipeline and the far end of the flushing pipeline.

[0031] In this embodiment, the suction pipeline includes a suction tube 1, and a flushing and suction joint 6 is provided at the junction of the proximal end of the suction pipeline and the proximal end of the flushing pipeline. The distal end of the flushing and suction joint 6 is connected to the proximal end of the suction tube 1, and the flushing and suction joint 6 and the suction tube 1 are connected by a threaded connection or a transition fit or other detachable connection method, so that different types of suction tubes 1 can be replaced according to different needs; the proximal end of the flushing and suction joint 6 is a forked structure and its ends are respectively a flushing inlet 4 and a suction inlet 5. The suction tube 1, the flushing and suction joint 6, and the suction inlet 5 are connected in sequence to form a suction pipeline, and the suction inlet 5 is connected to the negative pressure suction device. A suction pressure control valve 7 is provided at one end of the flushing and suction joint 6 near the suction inlet 5. The suction pressure control valve 7 can be a long strip opening. The long strip opening can be covered by a finger to expose openings of different sizes, thereby forming different suction pressures in the suction pipeline. It can also be a push-pull switch. The push-pull switch can be made to expose openings of different sizes by pushing and pulling, thereby forming different suction pressures in the suction pipeline. The invention relates to a three-way control valve. By rotating the three-way control valve, different suction pressures are formed in the suction pipeline. It can also be a pressing opening. By pressing, the inner diameter of the cavity is changed to form different suction pressures in the suction pipeline, thereby achieving the purpose of controlling the suction pressure, and other structures that can be used to adjust the pressure; and a flushing tube 2 is sleeved in the suction tube 1. The distal end of the flushing tube 2 is coaxial with the distal end of the suction tube 1 and the proximal end of the flushing tube 2 extends to the flushing inlet 4 and is connected to a catheter connector 8 with two ends passing therethrough. The catheter connector 8 and the flushing tube 2 are connected by a threaded connection, a transition fit, or other detachable connection method, so that different models of flushing tubes 2 can be replaced according to different needs; the catheter connector 8 is connected to the flushing inlet 4 near one end of the flushing tube 2, and the connection method of the catheter connector 8 to the flushing inlet 4 near one end of the flushing tube 2 is a threaded connection, a transition fit, or other detachable connection method. The flushing tube 2 is connected to the catheter connector 8 to form a flushing pipeline, and the catheter connector 8 is connected to the infusion device at one end away from the flushing tube 2. When cleaning a wound, the irrigation fluid flushes out from the distal end of the flushing tube 2 to clean the wound, and the liquid after cleaning the wound is sucked back into the suction pipeline from the distal end of the suction tube 1, so that the liquid forms a circulating vortex after flushing out of the flushing tube 2. In addition, by adjusting the relative height between the suction tube 1 and the flushing tube 2 so that the distal end of the suction tube 1 is higher, flush with, or lower than the distal end of the flushing tube 2, the liquid can form different vortex refluxes.

[0032] In this embodiment, a plurality of small holes 3 are provided on the distal end wall of the suction tube 1 . The small holes 3 are arranged linearly or circumferentially along the central axis of the suction tube 1 . By changing the number and arrangement of the small holes 3 , vortices of different shapes can be generated.

[0033] In this embodiment, the suction tube 1 is provided with a bending control device 9, which is a traction wire with one end connected to the outer wall of the suction tube 1, and the other end of the traction wire is connected to the flushing and suction joint 6 or is a free end. By pulling the traction wire to adjust the curvature of the suction tube 1, it is convenient to clean the inside of the cavity or complex wound, and a handle can be provided on the tube wall of the flushing and suction joint 6, and the proximal end of the traction wire can be fixed to the handle for easy bending control. In addition, common medical equipment such as obturator can also be used to achieve a passive bending control effect.

[0034] In this embodiment, the suction tube 1 can be a hard tube or a semi-hard tube or a soft tube or a mixture of a soft tube and a hard tube, and its material can be transparent or translucent or opaque or a mixture of transparent and opaque, and its structure can be a single-cavity structure or a multi-cavity structure; the flushing tube 2 can be a hard tube or a semi-hard tube or a soft tube or a mixture of a soft tube and a hard tube, and its material can be transparent or translucent or opaque or a mixture of transparent and opaque, and its structure can be a single-cavity structure or a multi-cavity structure. In addition, a developing tube can be used as the suction tube 1 or the flushing tube 2 so that the position of the suction tube 1 or the flushing tube 2 inside the wound can be observed, and a scale can be set on the outer wall of the suction tube 1 to facilitate the observation of the depth of the suction tube 1 inserted into the wound.

[0035] When in use, the distal end of the suction tube 1 and the distal end of the flushing tube 2 are placed together near the wound that needs to be flushed and suctioned, the suction inlet 5 is connected to the negative pressure suction device, and the distal end of the flushing tube 2 is extended into the suction tube 1 and the distal end of the flushing tube 2 is coaxial with the distal end of the suction tube, the catheter connector 8 is connected to the infusion device, and the negative pressure suction device and the infusion device work simultaneously. The irrigation fluid in the infusion device is flushed out from the distal end of the flushing tube 2 to clean the wound. At the same time, under the suction force of the negative pressure suction device, the flushed liquid flows from the distal end of the suction tube 1 into the suction pipeline, thereby achieving a dynamic balance between the flushing liquid and the suction liquid, so that the liquid circulates and forms a vortex, which can prevent the outflow of irrigation fluid from contaminating bed sheets and surgical instruments, etc., reducing the risk of infection and improving the cleaning effect; during the cleaning process, the suction pressure is adjusted by the suction pressure control valve 7 to control the flushing and suction pressure balance to reduce the outflow of irrigation fluid. If necessary, the curvature of the suction tube 1 can be adjusted by the bending control device 9 to facilitate the cleaning of the cavity or complex wound and achieve better cleaning effect.

[0036] Example 2

[0037] The difference between this embodiment and the first embodiment is that:

[0038] Please refer to Figure 2The suction pipeline includes a suction tube 1 and a flushing and suction joint 6. The flushing and suction joint 6 is a tubular structure whose interior is divided into two upper and lower chambers that are not connected to each other. The distal end of the flushing and suction joint 6 is connected to the proximal end of the suction tube 1. The flushing and suction joint 6 and the suction tube 1 are connected by a threaded connection or a transition fit or other detachable connection method, so that different types of suction tubes 1 can be replaced according to different needs; a sealing cap 10 is provided at the proximal end of the flushing and suction joint 6 to prevent water from overflowing; a suction inlet 5 is provided on the pipe wall of the flushing and suction joint 6. The suction tube 1, the upper chamber, and the suction The inlet 5 is connected in sequence to form a suction pipeline, and the suction inlet 5 is connected to the negative pressure suction device. In addition, a suction pressure control valve 7 can be provided at a position corresponding to the upper chamber on the flushing and suction joint 6 to adjust the suction pressure; and a flushing inlet 4 is also provided on the tube wall of the flushing and suction joint 6. A flushing tube 2 is sleeved in the suction tube 1. The distal end of the flushing tube 2 is coaxial with the distal end of the suction tube 1 and the proximal end of the flushing tube 2 extends into the lower chamber. The flushing tube 2, the lower chamber, and the flushing inlet 4 are connected in sequence to form a flushing pipeline, and the flushing inlet 4 is connected to the infusion device.

[0039] Example 3

[0040] The difference between this embodiment and the first embodiment is that:

[0041] Please refer to Figure 3 and Figure 8 The flushing pipeline includes a flushing tube 2, and a flushing and suction joint 6 is provided at the junction of the proximal end of the suction pipeline and the proximal end of the flushing pipeline. The distal end of the flushing and suction joint 6 is connected to the proximal end of the flushing tube 2, and the flushing and suction joint 6 and the flushing tube 2 are connected by a threaded connection or a transition fit or other detachable connection method, so that different types of flushing tubes 2 can be replaced according to different needs; the proximal end of the flushing and suction joint 6 is a forked structure and its ends are respectively a flushing inlet 4 and a suction inlet 5, the flushing tube 2, the flushing and suction joint 6, and the flushing inlet 4 are connected in sequence to form a flushing pipeline, and the flushing inlet 4 is connected to the infusion device, and the flushing tube 2 is provided with a suction tube 1, and the flushing tube 2 distal end is coaxial with the distal end of the suction tube 1, and the proximal end of the suction tube 1 extends to the suction inlet 5 and is connected to a catheter connector 8 with two ends extending therethrough. The catheter connector 8 and the suction tube 1 are connected by a threaded connection, a transition fit, or other detachable connection method, so that different types of suction tubes 1 can be replaced according to different needs; the catheter connector 8 is connected to the suction inlet 5 at one end close to the suction tube 1, and the connection method of the catheter connector 8 at one end close to the suction tube 1 and the suction inlet 5 is a threaded connection, a transition fit, or other detachable connection method. The suction tube 1 and the catheter connector 8 are connected to form a suction pipeline, and the end of the catheter connector 8 away from the suction tube 1 is connected to the negative pressure suction device.

[0042] In this embodiment, a plurality of small holes 3 are provided on the distal end wall of the flushing tube 2 , and the small holes 3 are linearly arranged or circumferentially distributed along the central axis of the flushing tube 2 .

[0043] In this embodiment, a bending control device 9 is provided on the flushing tube 2. The bending control device 9 is a traction line with one end connected to the outer wall of the flushing tube 2 and the other end connected to the flushing and suction joint 6 or is a free end.

[0044] In this embodiment, a scale is provided on the outer wall of the flushing tube 2 to facilitate observation of the depth of the flushing tube 2 inserted into the wound.

[0045] When in use in this embodiment, the distal end of the suction tube 1 and the distal end of the flushing tube 2 are placed together near the wound that needs flushing and suction, the catheter connector 8 is connected to the negative pressure suction device and the distal end of the suction tube 1 is extended into the suction and flushing tube 2 and the distal end of the flushing tube 2 is coaxial with the distal end of the suction tube 1, the flushing inlet 4 is connected to the infusion device, the negative pressure suction device and the infusion device work simultaneously, the irrigation fluid in the infusion device is flushed out from the distal end of the flushing tube 2 to clean the wound, and at the same time, under the attraction of the negative pressure suction device, the flushed liquid flows from the distal end of the suction tube 1 into the suction pipeline, thereby achieving a dynamic balance between flushing and suction, causing the liquid to circulate and form a vortex.

[0046] Example 4

[0047] The difference between this embodiment and the third embodiment is that:

[0048] Please refer to Figure 4 The flushing pipeline includes a flushing tube 2 and a flushing and suction joint 6. The flushing and suction joint 6 is a tubular structure whose interior is divided into two upper and lower chambers that are not connected to each other. The distal end of the flushing and suction joint 6 is connected to the proximal end of the flushing tube 2. The flushing and suction joint 6 and the flushing tube 2 are connected by a threaded connection or a transition fit or other detachable connection method, so that different types of flushing tubes 2 can be replaced according to different needs; the proximal end of the flushing and suction joint 6 is provided with a sealing cap 10, and the sealing cap 10 and the flushing and suction joint 6 are connected by a threaded connection or a transition fit or other detachable connection method. When the suction pressure needs to be adjusted, the sealing cap 10 can be removed and the proximal port of the flushing and suction joint 6 can be covered with a finger. The pressure can be adjusted in an adjustable manner, and the suction pressure can also be adjusted by setting a suction pressure control valve 7 at a position corresponding to the flushing and suction joint 6 and the lower chamber; a flushing inlet 4 is provided on the tube wall of the flushing and suction joint 6, and the flushing tube 2, the upper chamber, and the flushing inlet 4 are connected in sequence to form a flushing pipeline, and the flushing inlet 4 is connected to the infusion device, and a suction inlet 5 is also provided on the tube wall of the flushing and suction joint 6, and a suction tube 1 is sleeved inside the flushing tube 2, the distal end of the suction tube 1 is coaxial with the distal end of the flushing tube 2, and the proximal end of the suction tube 1 extends into the lower chamber, the suction tube 1, the lower chamber, and the suction inlet 5 are connected in sequence to form a suction pipeline, and the suction inlet 5 is connected to the negative pressure suction device.

[0049] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-mentioned disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention that do not depart from the content of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

1. A coaxial flushing and suction irrigator, comprising a suction line for sucking liquid and a flushing line for flushing liquid; characterized in that: The proximal end of the suction line is connected to a negative pressure suction device, the proximal end of the flushing line is connected to an infusion device, and the distal end of the suction line and the distal end of the flushing line are coaxial to form a circulating vortex structure in which the liquid flushed out from the distal end of the flushing line flows into the suction line when the two lines work simultaneously; The suction pipeline comprises a suction tube (1), and a flushing and suction joint (6) is provided at the junction of the proximal end of the suction pipeline and the proximal end of the flushing pipeline. The distal end of the flushing and suction joint (6) is connected to the proximal end of the suction tube (1). The proximal end of the flushing and suction joint (6) is a bifurcated structure, and its ends are respectively a flushing inlet (4) and a suction inlet (5). The suction tube (1), the flushing and suction joint (6), and the suction inlet (5) are connected in sequence to form a suction pipeline, and the suction inlet (5) is connected to the negative pressure suction device. A suction pressure control valve (7) is provided at one end, and a flushing tube (2) is sleeved inside the suction tube (1), the distal end of the flushing tube (2) is coaxial with the distal end of the suction tube (1), and the proximal end of the flushing tube (2) extends to the flushing inlet (4) and is connected to a catheter connector (8) with two ends connected therethrough, the catheter connector (8) is connected to the flushing inlet (4) near one end of the flushing tube (2), the flushing tube (2) and the catheter connector (8) are connected to form a flushing pipeline, and the catheter connector (8) is connected to the infusion device at one end away from the flushing tube (2); The suction pipeline comprises a suction tube (1) and a flushing and suction joint (6). The flushing and suction joint (6) is a tubular structure whose interior is divided into two mutually incommunicative upper and lower chambers. The distal end of the flushing and suction joint (6) is connected to the proximal end of the suction tube (1) and a sealing cap (10) is provided at the proximal end of the flushing and suction joint (6). A suction inlet (5) is provided on the tube wall of the flushing and suction joint (6). The suction tube (1), the upper chamber, and the suction inlet (5) are sequentially connected to form a suction pipeline, and the suction inlet (5) is connected to a negative pressure suction device. In addition, a flushing inlet (4) is further provided on the tube wall of the flushing and suction joint (6). A flushing tube (2) is sleeved inside the suction tube (1). The distal end of the flushing tube (2) is coaxial with the distal end of the suction tube (1), and the proximal end of the flushing tube (2) extends into the lower chamber. The flushing tube (2), the lower chamber, and the flushing inlet (4) are sequentially connected to form a flushing pipeline, and the flushing inlet (4) is connected to an infusion device.

2. The coaxial flushing and suction irrigator according to claim 1, characterized in that: A plurality of small holes (3) are provided on the distal end wall of the suction tube (1), and the small holes (3) are arranged linearly or distributed circumferentially along the central axis of the suction tube (1).

3. The coaxial flushing and suction irrigator according to claim 1, characterized in that: The suction tube (1) is provided with a bending control device (9), which is a traction line with one end connected to the outer wall of the suction tube (1), and the other end of the traction line is connected to the flushing and suction joint (6) or is a free end.

4. The coaxial flushing and suction irrigator according to claim 1, characterized in that: The flushing pipeline comprises a flushing tube (2), a flushing and suction joint (6) is provided at the junction of the proximal end of the suction pipeline and the proximal end of the flushing pipeline, the distal end of the flushing and suction joint (6) is connected to the proximal end of the flushing tube (2), the proximal end of the flushing and suction joint (6) is a bifurcated structure and its ends are respectively a flushing inlet (4) and a suction inlet (5), the flushing tube (2), the flushing and suction joint (6) and the flushing inlet (4) are connected in sequence to form the flushing pipeline, and the flushing inlet (4) is connected to the infusion device, and, The flushing tube (2) is provided with a suction tube (1) sleeved therein, the distal end of the flushing tube (2) is coaxial with the distal end of the suction tube (1), and the proximal end of the suction tube (1) extends to the suction inlet (5) and is connected to a catheter connector (8) with two ends passing therethrough, the catheter connector (8) is connected to the suction inlet (5) near one end of the suction tube (1), the suction tube (1) and the catheter connector (8) are connected to form a suction pipeline, and the catheter connector (8) is connected to a negative pressure suction device at one end away from the suction tube (1).

5. The coaxial flushing and suction irrigator according to claim 1, characterized in that: The flushing pipeline comprises a flushing tube (2) and a flushing and suction joint (6). The flushing and suction joint (6) is a tubular structure whose interior is divided into two mutually incommunicative upper and lower chambers. The distal end of the flushing and suction joint (6) is connected to the proximal end of the flushing tube (2) and the proximal end of the flushing and suction joint (6) is provided with a sealing cap (10). A flushing inlet (4) is provided on the tube wall of the flushing and suction joint (6). The flushing tube (2), the upper chamber, and the flushing inlet (4) are sequentially connected to form a flushing pipeline, and the flushing inlet (4) is connected to an infusion device. In addition, a suction inlet (5) is further provided on the tube wall of the flushing and suction joint (6). A suction tube (1) is sleeved inside the flushing tube (2). The distal end of the suction tube (1) is coaxial with the distal end of the flushing tube (2), and the proximal end of the suction tube (1) extends into the lower chamber. The suction tube (1), the lower chamber, and the suction inlet (5) are sequentially connected to form a suction pipeline, and the suction inlet (5) is connected to a negative pressure suction device.

6. The coaxial flushing and suction irrigator according to claim 4 or 5, characterized in that: A plurality of small holes (3) are provided on the distal end wall of the flushing tube (2), and the small holes (3) are linearly arranged or circumferentially distributed along the central axis of the flushing tube (2).

7. The coaxial flushing and suction irrigator according to claim 4 or 5, characterized in that: The flushing tube (2) is provided with a bending control device (9), which is a traction line with one end connected to the outer wall of the suction tube (1), and the other end of the traction line is connected to the flushing and suction joint (6) or is a free end.

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