Irrigation catheter and irrigation catheter system

Abstract

The present invention is applicable to the field of medical devices, and provides an irrigation catheter, which includes a catheter assembly, a handle assembly, a filling channel, and a filling assembly. The handle assembly is provided with a cavity connected to a first pipe of a catheter of the catheter assembly, and the handle assembly includes a movable assembly axially and movably arranged in the cavity, so that the cavity has a first state in which the catheter can perform an irrigation operation and a second state in which the catheter can perform an aspiration operation. The filling assembly includes a filling portion arranged at the distal end of the catheter of the catheter assembly, and an adjusting member connected to the filling channel, the filling portion is connected to the filling channel, and the adjusting member controls the expansion of the filling portion by controlling the opening and closing of the filling channel, so that the filling portion at the distal end of the catheter can be in an expanded state when the catheter performs an aspiration operation, and the bronchial wall and other tissues are stretched open, so that the suction port at the distal end of the catheter does not contact and fit with the tissue, so that the catheter is easier to aspirate.

Description

Technical Field

[0001] The invention belongs to the field of medical devices, and in particular relates to an irrigation catheter and an irrigation catheter system. Background Art

[0002] Bronchoalveolar lavage is a method of injecting saline into the bronchoalveoli with a bronchoscope and then aspirating it to collect the effective fluid on the alveolar surface and examine its cellular components and soluble substances. It is clinically used for the diagnosis and differential diagnosis of various lung diseases, such as alveolitis, pulmonary fibrosis, asbestosis, lung cancer, pulmonary alveolar proteinosis, etc., as well as for studying the etiology, pathogenesis, and efficacy evaluation of lung diseases.

[0003] At present, the lavage catheter is generally delivered to the target bronchus through a bronchoscope, and then the saline is injected into the target bronchus through the injection port. After lavage, the working state of the lavage catheter is switched to the suction state, and the negative pressure device is turned on to complete the suction, and the lavage and suction are completed once. Due to the limited size of the bronchoscope, it is impossible to extend into the more secondary bronchi. The lavage catheter can only be extended from the bronchoscope and then continue to extend into the subsegment. The bronchial subsegment is narrow. When the lavage catheter is in the negative pressure suction state, it is easy to cause the bronchial wall to adhere to or wrap the distal port of the catheter body under the action of negative pressure. The suction port for extracting liquid, resulting in the inability to suck out the lavage fluid in the bronchus, resulting in a low recovery rate of the lavage fluid, which may cause the lavage fluid to remain in the trachea and cause complications such as hypoxemia and fever. Summary of the invention

[0004] The purpose of the present invention is to provide an lavage catheter and an lavage catheter system, aiming to solve the defect in the prior art that bronchial subsegments are prone to cause suction difficulties, and to provide an lavage catheter and an lavage catheter system.

[0005] The present invention is implemented as follows: an irrigation catheter, comprising: a catheter assembly, comprising a catheter for intervention in the body, the catheter comprising a first channel;

[0006] A handle assembly is connected to the catheter, the handle assembly includes a housing, the housing is provided with a cavity communicated with the first pipe of the catheter, and the handle assembly includes an axially movable member inserted into the cavity.

[0007] The movable component in the cavity is configured to enable the cavity to have a first state in which the catheter can perform an infusion operation and a second state in which the catheter can perform an aspiration operation;

[0008] The filling assembly comprises a filling part, an adjusting member and a filling channel, wherein the filling part is arranged at the distal end of the catheter, the adjusting member is closer to the proximal end of the catheter than the filling part, the filling channel and the first pipe of the catheter are independent of each other, and the two ends of the filling channel are respectively connected to the filling part and the adjusting member.

[0009] The adjusting member is connected to a joint, and the adjusting member controls the expansion of the filling portion by controlling the opening and closing of the filling channel. In one embodiment, the side wall of the distal end of the catheter is provided with an opening connected to the first pipe of the catheter, and the filling portion is arranged adjacent to the proximal end of the opening.

[0010] In one embodiment, the opening is spaced apart from the distal end surface of the catheter.

[0011] In one of the embodiments, the handle assembly is provided with an adjustment channel connected to the filling channel, and the adjustment member can control the opening and closing of the adjustment channel to control the opening and closing of the filling channel.

[0012] In one embodiment, the adjusting member is movably arranged on the handle assembly, and the adjusting member comprises a plug body movably arranged on the adjusting channel and a traction part, one end of the traction part is fixedly connected to the plug body, and the other end of the traction part is fixedly arranged on the movable assembly.

[0013] In one of the embodiments, the adjusting member further includes an elastomer, which is sleeved on an end portion of the traction portion close to the plug body, and the elastomer is supported between the shell of the handle assembly and the plug body.

[0014] In one embodiment, the adjusting member is movably arranged on the handle assembly, and the adjusting member includes a plug body movably arranged on the adjusting channel, a traction part fixedly connected to the plug body at one end, an elastic body sleeved on one end of the traction part close to the plug body, and a cover arranged at the entrance of the adjusting channel.

[0015] A pressure cover is provided at the position, a gap is formed between the pressure cover and the plug body, the elastic body is supported between the shell of the handle assembly 5 and the plug body, the other end of the traction part is fixed on the movable assembly, and an inflation port is provided on the pressure cover.

[0016] In one embodiment, the regulating channel includes a main channel and an expansion channel, the filling channel can be connected to the expansion channel through the main channel, the plug body is at least partially accommodated in the expansion channel and can move relative to the main channel to control the opening and closing of the filling channel.

[0017] In one embodiment, the shell includes a first shell and a second shell connected to each other, the first shell and the second shell enclose the cavity, the first shell is connected to the conduit, and the first shell is provided with an injection channel that can be communicated with the cavity. In the first state, the injection channel is communicated with the cavity, and the adjusting member is in a state of isolating the filling channel; in the second state, the movable component is blocked in the injection channel; and the adjusting member is in a state of connecting the filling channel.

[0018] The present invention also provides an irrigation catheter system, comprising a bronchoscope, a collector, a negative pressure device, a gas delivery device and a liquid perfusion device, and also comprises an irrigation catheter as described above, wherein the bronchoscope comprises a channel for the catheter to pass through, the collector is connected to the irrigation catheter to collect the irrigation fluid extracted when the irrigation catheter performs suction, the negative pressure device is connected to the irrigation catheter through the collector, the gas delivery device has a gas delivery channel, the gas delivery channel is connected to the filling channel and can deliver gas to the filling channel, and the liquid perfusion device is connected to the irrigation catheter to perfuse irrigation fluid into the first pipe of the catheter.

[0019] The irrigation catheter provided by the present invention is provided with a catheter assembly, a handle assembly, a filling channel and a filling assembly, wherein the handle assembly is provided with a cavity connected to a first pipe of the catheter of the catheter assembly, and the handle assembly includes a movable assembly axially and movably arranged in the cavity, so that the cavity has a first state in which the catheter can perform an irrigation operation and a second state in which the catheter can perform a suction operation, thereby respectively performing irrigation operation and suction operation, and the filling assembly includes a filling portion provided at the distal end of the catheter of the catheter assembly, and an adjusting member connected to the filling channel, the filling portion is connected to the filling channel, and the adjusting member controls the expansion of the filling portion by controlling the opening and closing of the filling channel, thereby enabling the filling portion located at the distal end of the catheter to be in an expanded state when the catheter performs a suction operation, and to expand the endothelial wall such as the bronchial wall, so that the suction port at the distal end of the catheter is not attached to or wrapped by the endothelial wall of the tissue such as the bronchial wall, thereby enabling the tube opening at the distal end of the catheter to be less likely to be blocked when the irrigation catheter is in a negative pressure suction state and is easier to perform suction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional schematic diagram of an irrigation catheter provided in Embodiment 1 of the present invention;

[0021] Figure 2 is an exploded schematic diagram of an irrigation catheter provided in Embodiment 1 of the present invention;

[0022] Figure 3 is a cross-sectional view of the irrigation catheter provided in the first embodiment of the present invention when performing irrigation work;

[0023] Figure 4 yes Figure 3 An enlarged schematic diagram of A in FIG.

[0024] Figure 5 yes Figure 3 An enlarged schematic diagram of point B in FIG.

[0025] Figure 6 is a cross-sectional view of the irrigation catheter provided in the first embodiment of the present invention when performing suction work;

[0026] Figure 7 yes Figure 6 An enlarged schematic diagram of C in FIG.

[0027] Figure 8 yes Figure 6 An enlarged schematic diagram of D in FIG.

[0028] Fig. 9 is a cross-sectional schematic diagram of the irrigation catheter provided in the second embodiment of the present invention when performing irrigation work;

[0029] Fig.10 yes Fig. 9 An enlarged schematic diagram of point E in FIG.

[0030] Fig.11 is a cross-sectional schematic diagram of the irrigation catheter provided in the second embodiment of the present invention when performing suction work;

[0031] Fig.12 yes Fig.11 An enlarged schematic diagram of F in FIG.

[0032] Fig.13 is a schematic diagram of an irrigation catheter system provided by the present invention;

[0033] Fig.14 yes Fig.13 An enlarged schematic diagram of point G in FIG.

[0034] Reference numerals:

[0035] 100, irrigation catheter; 1, handle assembly; 10, containing cavity; 11, first shell; 111, first distal cavity; 112, first conical cavity; 113, first proximal cavity; 114, injection channel; 115, communication port; 12, second shell; 121, second conical cavity; 122, middle cavity; 123, third conical cavity; 124, second proximal cavity; 125, negative pressure channel; 1251, negative pressure port; 126, embedded groove; 127, pressure relief port; 13, movable assembly; 131, core shaft; 1311, communication part; 13111, communication hole; 1312, switching part; 13120, through hole; 13121, first conical surface; 13122, second conical surface; 13123, third conical surface; 1313, connecting part; 132, end cap; 1321, extension part; 1322, sealing part; 132 21. buffer section; 13222. conical head; 1323. brim; 133. compression elastic member; 14. adjustment channel; 141. main channel; 142. expansion channel; 1421. inner cone; 15. pressure relief channel; 2. catheter assembly; 21. catheter; 210. first pipeline; 23. opening; 3. filling assembly; 31. filling part; 32. adjustment member; 321. plug body; 3211. conical head ; 322, traction part; 323, elastic body; 324, gland; 3241, inflation port; 325, protrusion; 33, filling channel; 4, irrigation catheter system; 41, bronchoscope; 411, inlet; 412, outlet; 42, collector; 43, negative pressure device; 44, hose; 45, gas transmission device; 46, switch valve; T1, first channel; T2, second channel; O, sealing ring; H, gap DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0038] It should also be noted that the directional terms such as left, right, up, and down in this embodiment are merely relative concepts or are based on the normal use status of the product and should not be considered as restrictive.

[0039] For the convenience of description, the terms "distal end" and "proximal end" are defined here. The above terms are commonly used in the field of interventional medical devices. Specifically, the "distal end" refers to the end away from the operator during the operation, and the "proximal end" refers to the end close to the operator during the operation. "Axial" generally refers to the length direction of the medical device when it is transported, "circumferential" generally refers to the direction around the "axial direction", and "radial" generally refers to the direction of the medical device that is perpendicular to its "axial direction" and passes through the central axis, and the "axial" and "radial" of any component of the medical device are defined based on this principle.

[0040] Embodiment 1

[0041] See also Figures 1 to 4 and Figure 6 As shown, during the use of the irrigation catheter 100, by switching the position of the movable component 13 of the handle assembly 1 relative to the cavity 10 of the handle assembly 1, the cavity 10 of the handle assembly 1 forms a first state and a second state, so as to realize the first state in which the first channel T1 is connected to the first pipe 210 of the catheter 21 or the second state in which the second channel T2 is connected to the first pipe 210 of the catheter 21. When the cavity 10 of the handle assembly 1 is in the first state, the irrigation catheter 100 can perform irrigation work, and when the cavity 10 of the handle assembly 1 is in the second state, the irrigation catheter 100 can perform suction work, thereby meeting the irrigation and suction purposes of the irrigation catheter 100.

[0042] In this embodiment, the irrigation catheter 100 includes a handle assembly 1 , a catheter assembly 2 and a filling assembly 3 .

[0043] The catheter assembly 2 is bonded to the switchable state handle assembly 1. The catheter assembly 2 includes a catheter 21 for intervention in the body, the distal end surface of the catheter 21 is provided with a catheter port, the proximal end of the catheter 21 is connected to the communication port 115 opened at the distal end of the handle assembly 1 by gluing or threaded fitting, so that the hollow first pipe 210 of the catheter 21 is connected to the communication port 115, the handle assembly 1 is provided with a cavity 10 connected to the first pipe 210 of the catheter 21, and the cavity 10 is connected to the first pipe 210 of the catheter 21 through the communication port 115, and the handle assembly 1 includes a movable assembly 13 axially movably arranged in the cavity 10, so that the cavity 10 forms the above-mentioned first state and second state.

[0044] The handle assembly 1 also includes a housing, which includes a first housing 11 and a second housing 12 connected to each other. The proximal end of the first housing 11 is provided with an internal thread, and the distal end of the second housing 12 is provided with an external thread, and the first housing 11 is located at the distal end side of the second housing 12 so that the internal thread at the proximal end of the first housing 11 and the external thread at the distal end of the second housing 12 are connected through internal and external threads. The first housing 11 and the second housing 12 are axially connected and enclosed to form a cavity 10, and a part of the movable assembly 13 is movably located in the cavity 10 and can move axially to achieve a first state or a second state relative to the first housing 11 and the second housing 12.

[0045] See also Figure 1-3 A connecting port 115 connected to the catheter assembly 2 is provided at the distal end of the first shell 11, and an injection channel 114 is extended along a non-axial direction near the distal end of the first shell 11. The injection channel 114 can be perpendicular to the axial direction or form an acute angle with the extension line of the connecting port 115 along the axial direction toward the proximal end and is located above the first shell 11, so that in the first state, the injected liquid tends to flow along the first channel T1 toward the catheter assembly 2.

[0046] In this embodiment, the inner cavity of the first shell 11 includes a first distal cavity 111, a first conical cavity 112 and a first proximal cavity 113 from the distal end to the proximal end, the proximal end of the first distal cavity 111 is connected to the small end of the first conical cavity 112, the distal end of the second shell 12 is sealed and connected to the side wall of the first proximal cavity 113, the radial cross-sectional area of ​​the first distal cavity 111 is less than or equal to the radial cross-sectional area of ​​the small end of the first conical cavity 112, the radial cross-sectional area of ​​the first proximal cavity 113 is greater than or equal to the radial cross-sectional area of ​​the large end of the first conical cavity 112, and the core shaft 131 is provided with a first conical surface 13121 adapted to the first conical cavity 112. The inner cavity of the second housing 12 includes a second tapered cavity 121, a middle cavity 122, a third tapered cavity 123 and a second proximal cavity 124 from the distal end to the proximal end. The small end of the second tapered cavity 121 is connected to the distal end of the middle cavity 122, the small end of the third tapered cavity 123 is connected to the proximal end of the middle cavity 122, the large end of the third tapered cavity 123 is connected to the second proximal cavity 124, and the radial cross-sectional area of ​​the middle cavity 122 is smaller than the radial cross-sectional area of ​​the large end of the second tapered cavity 121 and the large end of the third tapered cavity 123. The core shaft 131 is provided with a second tapered surface 13122 adapted to the second tapered cavity 121, and the movable component 13 is also provided with a third tapered surface 13123 adapted to the third tapered cavity 123. When the movable component 13 moves in the cavity 10 , its first conical surface 13121 , second conical surface 13122 , and third conical surface 13123 are sealed against or separated from the inner walls of the first conical cavity 112 , second conical cavity 121 , and third conical cavity 123 , respectively, to change the state of the cavity 10 .

[0047] It can be understood that the radial dimension of a cone or a cone cavity changes along the axial direction in a trend of gradually decreasing or increasing, and the radial dimensions at its two axial ends must be different in size. Therefore, in each embodiment of the present invention, the "small end" is defined to refer to the end of the cone or cone cavity with a smaller radial dimension, and the "large end" is defined to refer to the end of the cone or cone cavity with a larger radial dimension.

[0048] The movable component 13 includes a core shaft 131, an end cap 132 and a compression elastic member 133. The core shaft 131 is located in the cavity 10. The proximal end of the core shaft 131 is detachably connected to the distal end of the end cap 132, and the end cap 132 is sleeved on the second shell 12 and covers the cavity 10. One end of the compression elastic member 133 abuts against the embedded groove 126 at the proximal end of the second shell 12, and the other end of the compression elastic member 133 abuts against the annular groove of the end cap 132.

[0049] The second shell 12 is provided with a negative pressure channel 125 connected to the cavity 10. In the first state, a pressure relief channel 15 is formed between the side wall formed by the connection between the end cap 132 and the core shaft 131 and the inner wall of the cavity 10, and the pressure relief channel 15 is connected to the negative pressure channel 125.

[0050] like Figure 1-3 As shown, a pressure relief port 127 is provided at the proximal end of the second shell 12, and the negative pressure channel 125 is arranged near the distal end of the second shell 12 and extends in a non-axial direction. In the first state, the pressure relief port 127 is connected with the negative pressure channel 125 to connect the negative pressure channel 125 with the outside to achieve pressure relief.

[0051] The proximal end of the second shell 12 is recessed along the axial distal end to form an embedding groove 126 for fixing the compression elastic member 133. The distal end of the compression elastic member 133 is embedded in the embedding groove 126. The compression elastic member 133 is arranged around a portion of the end cap 132 as a whole, so that the distal end of the end cap 132 is threadedly connected to the core shaft 131, and the end cap 132 is also elastically connected to the second shell 12 so that the end cap 132 can move axially relative to the second shell 12. In this embodiment, the negative pressure channel 125 is perpendicular to the second shell 12 and is located below the second shell 12, so that the liquid sucked in the second state is collected in the collector through the negative pressure channel 125 along the second channel T2, as shown in FIG. Figure 6 shown.

[0052] When the handle assembly 1 is in the first state, the connecting portion 1311 of the core shaft 131 is on the proximal side of the connection between the injection channel 114 and the inner cavity of the first shell 11, so that the channel along the axial direction from the injection channel 114 through the first shell 11 to the connecting port 115 is formed as shown in FIG. Figure 3The first channel T1 is indicated by the arrow, and the first channel T1 is connected to the first pipe 210 of the catheter 21. At this time, the second conical surface 13122 of the core shaft 131 is sealed against the second conical cavity 121 of the second shell 12 to block the connection between the negative pressure channel 125 and the connecting port 115.

[0053] Combination Figure 1-3 and Figure 6 As shown, when the handle assembly 1 is in the first state, Figure 3 As shown, the inner wall of the second conical cavity 121 can abut against the second conical surface 13122 of the core shaft 131 and squeeze the sealing ring O to cooperate and seal, so that the core shaft 131 and the second shell 12 are sealed to block the passage between the negative pressure channel 125 and the connecting port 115. At the same time, the inner wall of the third conical cavity 123 and the third conical surface 13123 are spaced apart in a flat shape to form a pressure relief port 127; when the handle assembly 1 is in the second state, as shown in FIG. Figure 6 Shown in combination Figure 1-3 The inner wall of the third conical cavity 123 abuts against the third conical surface 13123 and is squeezed to seal the passage between the negative pressure channel 125 and the pressure relief port 127. At the same time, the inner wall of the first conical cavity 112 of the first shell 11 abuts against the first conical surface 13121 of the core shaft 131 and squeezes the sealing ring O at the corresponding position to deform and cooperate to maintain the sealing of the core shaft 131 and the first shell 11. At the same time, the core shaft 131 blocks the passage between the injection channel 114 and the connecting port 115. The inner wall of the second conical cavity 121 is spaced parallel to the second conical surface 13122 of the core shaft 131 to connect the passage between the negative pressure channel 125 and the connecting port 115.

[0054] like Figure 1-3 Combination Figure 6 As shown, the core shaft 131 is located in the housing 10 formed by the first shell 11 and the second shell 12 , and the core shaft 131 includes a connecting portion 1311 , a switching portion 1312 and a connecting portion 1313 from the distal end to the proximal end. The connecting portion 1311 is in the form of a long axis and is provided with a connecting hole 13111 along the axial direction. The connecting portion 1311 abuts against the first distal cavity 111. The switching portion 1312 can be a shuttle-shaped structure. The first conical surface 13121 and the second conical surface 13122 are both formed on the shuttle-shaped structure. In the first state, the second conical surface 13122 of the shuttle-shaped structure is sealed and abutted against the side wall of the second conical cavity 121, and the third conical surface 13123 is spaced and parallel to the side wall of the third conical cavity 123; in the second state, the first conical surface 13121 is sealed and abutted against the side wall of the first conical cavity 112, and the third conical surface 13123 of the movable component 13 is sealed and abutted against the side wall of the third conical cavity 123. The middle part of the shuttle-shaped switching part 1312 is provided with a through hole 13120 which penetrates radially and communicates with the cavity 10, and the communication hole 13111 extends toward the proximal end and communicates with the through hole 13120 along the axial direction. Figure 3As shown, the communication hole 13111 and the through hole 13120 together form a channel connecting the negative pressure channel 125 and the communication port 115. The proximal end of the connecting portion 1313 is connected to the end cap 132, and the proximal end is provided with an external thread, and correspondingly, the distal end of the end cap 132 is provided with an internal thread adapted to the external thread, so that the two can be detachably connected.

[0055] like Figure 1-3 As shown, the end cap 132 includes an extension portion 1321, a sealing portion 1322 and a brim portion 1323 from the distal end to the proximal end. The distal end of the sealing portion 1322 extends toward the distal end to form an extension portion 1321. The extension portion 1321 is sleeved on the proximal end of the core shaft 131 and is located in the inner cavity of the second shell 12. The extension portion 1321 includes a blind hole for accommodating part of the connecting portion 1313, and an internal thread is provided in the blind hole. The extension portion 1321 and the connecting portion 1313 of the core shaft 131 are connected to each other through the internal thread of the blind hole at the distal end of the end cap 132. The proximal end of the sealing portion 1322 is connected to the brim portion 1323, and the sealing portion 1322 includes a buffer section 13221 and a conical head 13222. The third conical surface 13123 is the side wall surface of the conical head 13222. The small end of the conical head 13222 is connected to the extension portion 1321, the large end of the conical head 13222 is connected to the distal end of the buffer section 13221, and the proximal end of the buffer section 13221 is connected to the brim portion 1323. A groove (not shown in the figure) for accommodating the sealing ring O is provided on the side wall surface of the conical head 13222, and the side wall surface of the conical head 13222 is used to abut and squeeze (press with external force) the second conical cavity 121 of the second shell 12 to seal the pressure relief port 127, and the buffer section 13221 is used to connect the sealing portion 1322 and the brim portion 1323, the brim portion 1323 surrounds the proximal end of the second shell 12, and the compression elastic member 133 is arranged around the sealing portion 1322.

[0056] The compression elastic member 133 may be a compression spring, and the compression elastic member may be made of high-quality carbon steel, alloy steel, stainless steel or other materials.

[0057] The movable assembly 13 further includes a plurality of sealing rings O to achieve a sealed connection between the abutting surfaces.

[0058] The second housing 12 is provided with a groove for accommodating the sealing ring O near the external thread. The first housing 11 and the second housing 12 are threadedly connected and the sealing ring O is squeezed to increase the sealing performance of the connection between the two housings. Figure 1-3 Combination Figure 6As shown. Similarly, the conical surfaces of the mandrel 131 of this embodiment, through the grooves and the sealing rings O in the grooves, abut against the inner walls of the conical cavities of the first shell 11 and the second shell 12 to squeeze the sealing rings O to increase the sealing performance, ensure the negative pressure environment when the second channel T2 is connected, and prevent the suction difficulties caused by poor sealing. Among them, the sealing ring O can be made of rubber materials, combined with the abutment of the mandrel 131 and the side walls of the conical cavities of the first shell 11 and the second shell 12 to squeeze the sealing ring O, so as to achieve good sealing performance.

[0059] Figure 3 The schematic diagram of the handle assembly 1 of this embodiment when the cavity 10 is in the first state is shown. Figure 1-2 As shown, when the handle assembly 1 is in the first state, the compression elastic member 133 is in a pre-compression state (the pre-compression state refers to a smaller compression amount relative to the natural state of the compression elastic member 133), so that the compression elastic member 133 can always have an elastic force toward the distal end on the end cap 132 to keep the compression elastic member 133 between the end cap 132 and the second shell 12, while keeping the second conical surface 13122 of the core shaft 131 and the inner wall of the second conical cavity 121 of the second shell 12 in a pressure-contact state, and at the same time squeeze the sealing ring O at the corresponding position to maintain better sealing, and the first conical surface 13121 of the core shaft 131 is parallel to the inner wall of the first conical cavity 112 of the first shell 11. At this time, the distal end of the core shaft 131 keeps away from the injection channel 114 to ensure that the injection channel 114 forms a first channel T1 with the inside of the first shell 11 and is connected to the first pipe 210 of the catheter 21 through the connecting port 115. The injection channel 114 and the channel along the axial direction of the first shell 11 together form the first channel T1. The second conical surface 13122 of the core shaft 131 abuts against the inner wall of the second conical cavity 121 of the second shell 12 and is squeezed and matched under the pre-compression rebound force of the compression elastic member 133 on the movable component 13 toward the proximal end, so that the core shaft 131 is sealed with the second shell 12 to block the communication between the negative pressure channel 125 and the connecting port 115. At the same time, the inner wall of the third conical cavity 123 is spaced flat from the third conical surface 13123 to form a pressure relief port 127 connected to the negative pressure channel 125, so that the negative pressure channel 125 is connected to the outside to relieve pressure. In the first state, physiological saline can be injected through the injection channel 114, and the injected physiological saline is injected into the bronchoalveoli through the first channel T1 and the first pipe 210 of the catheter 21 to achieve injection lavage.

[0060] Figure 6 The schematic diagram of the embodiment of the present invention is a schematic diagram showing the mandrel 131 in the second state relative to the housing. Figure 7 As shown, based on the first state, pressing the end cap 132 can drive the core shaft 131 to Figure 3 The first state shown moves axially toward the distal end to form Figure 6 In the second state shown, when the handle assembly 1 is in the second state, the compression elastic member 133 is in a compressed state (the compression state of the second state is an incompletely compressed state, that is, when the compression elastic member 133 is not compressed to the maximum deformation amount, the core shaft 131 has moved to the farthest limit position toward the distal end. At this time, the core shaft 131 has blocked the injection channel 114 and the first conical surface 13121 of the core shaft 131 is in contact with the inner wall of the first conical cavity 112 of the first shell 11, and the sealing performance is improved by the inclined surface abutment, and the sealing performance can be further improved by extruding the sealing ring O, that is, on the basis of the inclined surface abutment of each conical surface, the sealing performance of the first state and the second state is improved by combining the extrusion of the sealing ring O), so that the connection of the core shaft 131 The portion 1311 blocks the injection channel 114 on the side. At the same time, the first conical surface 13121 of the core shaft 131 is tightly abutted against the inner wall of the first conical cavity 112 of the first shell 11 to maintain the sealing of the core shaft 131 and the first shell 11. The second conical surface 13122 of the core shaft 131 is parallel to the inner wall of the second conical cavity 121 of the second shell 12 to connect the negative pressure channel 125 and the through hole 13120, thereby connecting the passage between the negative pressure channel 125 and the catheter assembly 2 (i.e., forming a second channel T2). The inner wall of the third conical cavity 123 of the second shell 12 is abutted against the third conical surface 13123 of the end cap 132 and squeezes the sealing ring O at the corresponding position to block the pressure relief port 127, maintain the sealing and prevent pressure relief. At this time, a connected second channel T2 is formed from the connecting port 115 through the connecting hole 13111, the through hole 13120 to the negative pressure channel 125. Figure 6 The path T2 is shown, and the second channel T2 is connected to the first pipe 210 of the catheter 21. The negative pressure channel 125 can achieve the suction of the physiological saline after irrigation by connecting to the negative pressure device.

[0061] In other embodiments, when the handle assembly 1 is in the second state, the compression elastic member 133 may also be in a fully compressed state, as long as the relative position of the handle is in the second state when the compression elastic member 133 is fully compressed (or before it is fully compressed), and the second channel T2 has good sealing properties.

[0062] By pressing the end cap 132 and further pressing the compression elastic member 133, the end cap 132 pushes the core shaft 131 to move axially from the proximal end to the distal end, and the core shaft 131 moves from the first state to the second state; when the force pressing the end cap 132 is removed, the compression elastic member 133 returns from the compressed state to the pre-compressed state, and the core shaft 131 automatically returns from the second state to the first state along with the end cap 132, thereby realizing the rapid switching of the core shaft 131 between the first state and the second state relative to the shell.

[0063] See also Figure 1-7As shown, the filling assembly 3 includes a filling portion 31, an adjusting member 32 and a filling channel 33. The filling portion 31 is arranged at the distal end of the catheter 21, and both ends of the filling channel 33 are connected to the filling portion 31 and the adjusting member 32, that is, the adjusting member 32 is closer to the proximal end of the catheter 21 than the filling portion 31, see Figure 3 , Figure 4 In this embodiment, the filling channel 33 is independently provided from the first pipe 210 of the catheter 21, that is, the filling channel 33 and the first pipe 210 of the catheter 21 are two independent channels. The filling channel 33 is used to guide the filled gas or liquid to the distal end of the catheter 21.

[0064] The adjusting member 32 controls the expansion state of the filling portion 31 by controlling the opening and closing of the filling channel 33, and the adjusting member 32 includes a traction portion 322 connected to the mandrel 131, and the traction portion is used to control the opening and closing of the filling channel 33 by the adjusting member 32 to correspond to the first state and the second state of the cavity, that is, when the cavity is in the first state, the mandrel 131 controls the traction portion to block the filling channel 33, and when the cavity is in the second state, the mandrel 131 controls the traction portion to connect the filling channel 33. In this embodiment, the traction portion can be set as a pull rope, and a slot for the traction portion to extend is set at a corresponding position of the handle assembly. By setting the traction part 322 to be connected with the core shaft 131 so that the core shaft 131 controls the switching between the first state and the second state of the cavity, and at the same time controls the adjusting member to control the on-off of the filling channel, the two independent processes of the suction of the irrigation catheter and the connection of the filling component can be linked by the core shaft when the cavity is in the second state, so as to realize the integrated control of the suction and the expansion of the filling part, so that the suction after irrigation and the on-off control of the filling part are easy to operate, and the irrigation time can be shortened, the patient's pain can be reduced, and a better irrigation effect can be achieved under single-person operation. In other embodiments, the traction part can also be set to other structures that can control the on-off of the filling channel 33 by means of the core shaft 131 linkage adjusting member 32, such as a push rod, and the corresponding shell at the movement of the push rod can be avoided. In this embodiment, the filling portion 31 can be filled by inflation. When the adjusting member 32 controls the filling channel 33 to be in a connected state, gas can be filled into the filling portion 31 through the filling channel 33 to expand the filling portion 31. The filling portion 31 can be an inflatable membrane bag. The filling portion 31 after inflation and expansion is a non-rigid support (i.e., in contact with the side wall of the bronchial subsegment) to reduce damage to the tissue, and can stretch the tissue (the side wall of the human bronchial subsegment, etc.). After the filling portion 31 stretches the tissue wall, the distal end of the catheter 21 expands, which can reduce the possibility that the tissue wall of the narrower subsegment completely adheres to or wraps the port at the distal end of the catheter 21, making it easier to perform suction. It can be understood that the filling portion 31 can also be expanded by filling liquid. When the adjusting member 32 controls the filling channel 33 to be in a disconnected state, for example, the filling channel 33 is blocked, gas cannot be filled into the filling portion 31, and the filling portion 31 is still in the initial unexpanded state. At this time, the filling portion 31 will not stretch the tissue (such as Figure 4 Combination Figure 5 shown).

[0065] Combination Figure 5As shown, the first housing 11 is provided with an adjusting channel 14 connected to the filling channel 33. The adjusting channel 14 includes a main channel 141 connected to the filling channel 33 and an expansion channel 142 connected to the main channel 141. The cross-sectional area of ​​the expansion channel 142 is larger than the cross-sectional area of ​​the main channel 141. The expansion channel 142 and the main channel 141 may be arranged at an angle. During filling, the gas flows from the expansion channel 142 into the main channel 141, and then flows from the main channel 141 into the filling channel 33. In this embodiment, the expansion channel 142 is arranged perpendicular to the axial direction of the handle assembly 1. The expansion channel 142 is used to accommodate a part of the adjusting member 32. The part of the adjusting member 32 can move in the expansion channel 142 to block the main channel 141 so that the adjusting member 32 is in a state of isolating the filling channel 33 from the gas transmission device or connecting the main channel 141 so that the adjusting member 32 is in a state of connecting the filling channel 33 with the gas transmission device.

[0066] See also Figure 2-5 The adjusting member 32 is movably disposed in the first housing 11 of the handle assembly 1. In other embodiments, the adjusting member may also be disposed in the second housing, or disposed outside the handle assembly, which is not limited here. The adjusting member 32 is movable relative to the first housing 11. The adjusting member 32 includes a plug body 321, a traction portion 322, and an elastic body 323. The plug body 321 is movably disposed in the expansion channel 142. One end of the traction portion 322 is fixedly connected to the plug body 321, and the other end is fixedly connected to the core shaft 131 of the movable assembly 13. The elastic body 323 is sleeved on one end of the traction portion 322 close to the plug body 321, and the elastic body 323 is held between the housing of the handle assembly 1 and the plug body 321. The plug body 321 has a cone head 3211 at one end close to the main channel 141, and the expansion channel 142 has an inner cone surface 1421 adapted to the cone head 3211. When the cavity is in the first state, the cone head 3211 of the plug body 321 is in sealing contact with the inner cone surface 1421 of the expansion channel 142, thereby blocking the passage between the expansion channel 142 and the main channel 141. When the core shaft 131 is in the first state in the cavity 10, the core shaft 131 is connected to the pull rope to tighten the pull rope, and the pull rope pulls the plug body 321 to press against the elastic body 323. Figure 5 As shown, the elastic body 323 is in a compressed state, the plug body 321 is located on a side close to the main channel 141, and the cone head 3211 of the plug body 321 is sealed and abutted against the inner cone surface 1421 of the expansion channel 142, blocking the entrance of the main channel 141. At this time, gas cannot be injected into the main channel 141, and the main channel 141 is in a blocked state, and the filling channel 33 cannot be filled through the main channel 141; when the core shaft switches from the first state to the second state in the cavity, the pull rope is relaxed, and the elastic body recovers partly or completely from the compressed state, so that the plug body 321 is away from the inner cone surface 1421 of the expansion channel 142, combined with Figure 8As shown, at this time, the expansion channel 142 is connected to the main channel 141, and gas can be injected into the main channel 141. When the cavity is in the first state, the proximal end of the main channel can be located below the distal end of the core shaft, and at the same time, the plug body is located at the end of the main channel. During the entire process from the core shaft being in the first state to switching to the second state in the cavity, the pull rope can be set to: the pull rope is only tensioned to relaxed; or it can also be set to: the pull rope is tensioned to relaxed and then tensioned, but the distance driven by the core shaft from tensioning to relaxing is greater than the distance from relaxing to tensioning, so as to prevent the plug body from abutting against the inner conical surface of the expansion channel when switching to the second state.

[0067] The elastic body 323 may be a compressible spring. In other embodiments, the elastic body 323 is not a necessary part, that is, the elastic body 323 can be removed, and the adjusting member 32 may not include the elastic body 323, and the on-off control and adjustment of the filling channel 33 can also be achieved.

[0068] In this embodiment, the adjusting member 32 also includes a pressure cover 324 covering the entrance of the expansion channel 142. The pressure cover 324 is detachably connected to the first shell 11 and can be fixed to the first shell 11 by means of threaded connection, snap connection or screws and other fasteners. The pressure cover 324 is provided with an inflation port 3241. When inflating, the external inflation device inflates the expansion channel 142 through the inflation port 3241, that is, when the mandrel is in the second state relative to the cavity, , there is a gap between the gland 324 and the plug body 321, and a small protrusion 325 can be provided on the side of the plug body 321 close to the gland 324 to support between the plug body 321 and the gland 324, and a gap is formed so that the non-protrusion can connect the inflation port 3241 and the main channel 141, so that when the elastic body 323 pushes the plug body 321 to move to the inner side of the gland 324 in a natural state, it can prevent the plug body 321 from completely fitting with the inner wall of the gland 324 and blocking the inflation port 3241. Alternatively, the height of the expansion channel is set so that when the cavity is in the second state, the elastic body completely returns to the non-compressed state, and the side of the plug body close to the inflation port 3241 is not attached to the gland 324 but has a gap, so that there is a gap between the plug body 321 and the gland 324 to connect the inflation port 3241 and the main channel 141.

[0069] See also Figure 6-8 , Figure 6 FIG. 2 shows a schematic diagram of the housing 10 of the handle assembly 1 in the second state. Figure 8The state of the regulating channel 14 and the regulating member 32 in the second state is shown. In the second state, the irrigation catheter 100 performs suction work. At this time, the filling part 31 needs to be inflated to expand and open the tissue wall to prevent the suction port (distal port or side wall opening) of the catheter 21 from fitting with the tissue wall and affecting the suction work. The core shaft 131 moves toward the distal end of the cavity 10 to form the second state. While the core shaft 131 moves, the pull rope is loosened, and the plug body 321 moves downward due to its own gravity and the elastic force of the elastic body 323. The plug body 321 moves downward due to its own gravity and the elastic force of the elastic body 323. The cone head 3211 of 21 and the inner cone surface 1421 of the expansion channel 142 are in an interval and parallel state, the passage between the expansion channel 142 and the main channel 141 is opened, and the expansion channel 142 and the main channel 141 are in a connected state. At this time, air can be inflated into the expansion channel 142 through the inflation port 3241 of the pressure cover 324, and the gas enters the filling part 31 along the expansion channel 142, the main channel 141, and the filling channel 33 in turn. The filling part 31 is filled and expanded to expand the tissue, and the irrigation catheter 100 can be smoothly suctioned.

[0070] See also Figure 4 and Figure 7 The side wall of the catheter 21 is provided with a filling channel 33 connected to the filling part 31 along the axial direction, that is, the filling channel 33 can be directly provided in the side wall of the catheter 21, which can simplify the overall structure of the irrigation catheter 100. It can be understood that in some other embodiments, a separate connecting pipe can be provided to fill the filling part 31 with gas and the connecting pipe can be fixed on the catheter 21, which can also achieve the purpose of filling the filling part 31 with gas.

[0071] In some other embodiments, see Figure 7 An opening 23 connected to the first conduit 210 of the conduit 21 may also be provided on the side wall of the distal end of the conduit 21, and the filling portion 31 is disposed adjacent to the proximal end of the opening 23. Since the opening 23 is relatively close to the filling portion 31, after the filling portion 31 is filled and expanded, the tissue wall 50 of the sub-segment is stretched open, so that the filling portion 31 is provided at the distal end thereof. The opening 23 stretches the tissue wall 50, so that the perfusion liquid can more easily enter the first conduit 210 of the conduit 21 through the opening during suction. The opening 23 is spaced apart from the distal end surface of the catheter 21, and because the filling portion 31 protrudes in the vertical axial direction relative to the side wall of the catheter 21, that is, the filling portion 31 protrudes from the opening 23 (protrudes from the side wall of the catheter) and the distal edge of the catheter in the circumferential direction, the filling portion 31 located on the proximal side of the opening 23 and the distal edge of the catheter 21 located on the distal side of the opening 23 support the tissue walls on the proximal and distal sides of the opening, thereby forming a gap H (such as Figure 7 Combination Fig.14As shown in the figure, during suction, the perfusion liquid can pass through the gap H and enter the first pipe 210 of the catheter 21 through the opening 23. At this time, even if the distal end of the catheter 21 is narrow due to the narrow bronchial subsegment, and the tissue wall of the bronchial subsegment is attached to the distal end of the catheter body when it is under negative pressure, it will not cause suction difficulties. That is, by providing a side wall opening, and supporting the tissue wall at the proximal and distal sides of the opening respectively with the help of the filling part 31 and the distal edge of the catheter, the tissue at the opening 23 is propped up, and a gap is formed at the opening 23 to achieve smooth suction of the perfusion liquid.

[0072] In other embodiments, the filling part can also be arranged non-continuously along the circumferential direction, and it is sufficient to ensure that the filling part is connected to the filling channel. The filling part may include a first filling part and a second filling part, the first filling part is located at the proximal side of the opening, and the second filling part is located at the distal end of the opening. The second filling part can be used to replace the role of the distal edge of the catheter, so as to prop up the tissue wall beside the proximal side and the distal side of the opening. The second filling part can be provided with one or two. When two second filling parts are provided, the two second filling parts are respectively provided on both sides of the axial line passing through the opening, and the irrigation fluid can enter the opening through the gap between the two filling parts, thereby entering the first channel of the catheter. When one second filling part is provided, the second filling part can be provided on one side of the axial line passing through the opening.

[0073] Embodiment 2

[0074] See also Figures 9 to 12 The main difference between the irrigation catheter of this embodiment and the irrigation catheter 100 of the first embodiment is that the structures of the adjustment channel 14 and the adjustment member 32 are different. The adjustment channel 14 is arranged in the first housing 11, and the adjustment channel 14 is connected to the filling channel 33. The adjustment member 32 can control the opening and closing of the adjustment channel 14 to control the opening and closing of the filling channel 33. In this embodiment, the specific structure, implementation method, working method, etc. of the filling channel 33, the first housing 11, the second housing 12, the core shaft 131, the end cap 132, the catheter assembly 2, and the filling part 31 can refer to the first embodiment, and will not be repeated here.

[0075] See also Fig. 9 , Fig.10The regulating channel 14 includes a main channel 141 and an expansion channel 142. The main channel 141 is connected to the filling channel (refer to the corresponding figure label of the filling channel in Example 1), and the expansion channel 142 is connected to the main channel 141. The cross-sectional area of ​​the expansion channel 142 is larger than the cross-sectional area of ​​the main channel 141. The expansion channel 142 and the main channel 141 can be set at an angle. As a specific embodiment, the expansion channel 142 and the main channel 141 can be set at an angle of 90 degrees. In other embodiments, the part of the expansion channel close to the core shaft side can be set at other angles to the main channel, as long as it is convenient for the traction part to extend and pull along the direction of the expansion channel. During filling, the gas flows from the expansion channel 142 into the main channel 141, and then flows from the main channel 141 into the filling channel 33.

[0076] In this embodiment, the main channel 141 and the expansion channel 142 are both arranged along the non-axial direction of the first shell 11. The expansion channel 142 is located at the entrance of the main channel 141. The expansion channel 142 is used to accommodate the adjustment member 32. The adjustment member 32 can move in the expansion channel 142 to block the proximal end of the main channel 141 so that the adjustment member is in a state of isolating the filling channel or avoiding the proximal end of the main channel 141 so that the adjustment member is in a state of connecting the filling channel.

[0077] The adjusting member 32 is movably disposed in the first housing 11. The adjusting member 32 includes a plug body 321, a traction portion 322, and an elastic body 323. The plug body 321 is movably disposed in the adjusting channel 14. One end of the traction portion 322 is fixedly connected to the plug body 321, and the other end is fixedly connected to the core shaft 131 of the movable component 13. The traction portion 322 can be set as a pull rope, the plug body 321 can be cylindrical, and the elastic body 323 can be a compression spring. One end of the elastic body 323 abuts against the abutment wall formed in the expansion channel 142 in the first housing 11, and the other end of the elastic body 323 abuts against the side of the plug body 321 close to the core shaft, and the pull rope passes through the middle of the compression spring, such as Fig.10 The length of the pull cord and the position of the connection between the pull cord and the core shaft can be determined according to the specific conditions such as the axial displacement of the core shaft and the distance the plug body needs to move when switching between the first state and the second state. Figure 9-10 As shown, when the core shaft 131 is in the first state in the cavity 10, the pull rope is in a relaxed state, the spring is in a natural state and has no force on the plug body, and the plug body 321 is blocked at the proximal end of the main channel 141 due to the friction between the plug body and the expansion channel 142. At this time, gas cannot be injected into the main channel 141, and the external inflation equipment cannot fill the filling part 31.

[0078] See also Fig.11 and Fig.12 , Fig.11 FIG. 2 shows a schematic diagram of the cavity in the second state. Fig.12The relative position relationship between the adjustment channel 14 and the adjustment member 32 in the second state is shown. In the second state, the irrigation catheter performs suction work. At this time, the filling part 31 needs to be inflated to expand it to expand the tissue to prevent the distal end of the catheter 21 from being attached or wrapped by the tissue wall and affecting the suction work. During the process of the core shaft 131 moving axially toward the distal end from the first state to form the second state, the core shaft pulls the pull rope, and the plug body 321 moves to the side close to the core shaft 131 under the pull of the pull rope, and the plug body 321 is pressed against the core shaft 131. The elastic body 323 is compressed, and the plug body 321 slides along the expansion channel 142 through the proximal end of the main channel 141, and the passage between the expansion channel 142 and the main channel 141 is opened, and the expansion channel 142 and the main channel 141 begin to communicate, and at this time, the expansion channel 142 can be inflated, and the gas enters the filling part 31 along the expansion channel 142, the main channel 141, and the filling channel 33 in sequence, and the filling part 31 is filled and expanded, so that the tissue wall of the sub-segment can be propped open, and the irrigation catheter can be smoothly sucked. It can be understood that in this embodiment, a detachably connected gland (not shown in the figure) can also be set at the entrance of the expansion channel 142, and an inflation port is opened on the gland.

[0079] like Fig.13 , Fig.14 As shown, the present invention further provides an irrigation catheter system 4, including an irrigation catheter 100, a bronchoscope 41, a collector 42, a negative pressure device 43, a gas delivery device 45 and a liquid irrigation device. The bronchoscope 41 includes a channel for the lavage catheter 100 to pass through, and the collector 42 is connected to the lavage catheter 100 to collect the lavage fluid extracted when the lavage catheter 100 performs suction work. The bronchoscope 41 is extended into the bronchus of the lung to form a delivery channel. The tube body of the catheter 21 of the lavage catheter 100 can be extended into the bronchoscope 41 from the entrance 411 of the delivery channel and extend from the exit 412 of the delivery channel along the channel, and then enter a more secondary bronchus. The gas delivery device 45 has a gas delivery channel 451, and the gas delivery channel 451 can be connected to the filling channel 33 of the lavage catheter 100 through an adjustment channel and can deliver gas to the filling channel 33. The gas delivery channel 451 is connected to the filling channel 33 through the adjustment channel 14 of the lavage catheter 100. The liquid perfusion device is connected to the lavage catheter 100 to perfuse lavage fluid into the first pipe 210 of the catheter 21. The negative pressure device 43 is connected to the negative pressure port 1251 of the negative pressure channel 125 of the irrigation catheter 100 through the collector 42, and the two ends of the collector 42 are respectively connected to the negative pressure port 1251 and the negative pressure device 43 through the hose 44. The liquid perfusion device includes a switch valve 46, which is used to communicate with the injection channel 114 in the first state and perfuse physiological saline into the irrigation catheter 100.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An irrigation catheter, characterized in that ,include: A catheter assembly, comprising a catheter for intervention in a body, wherein the catheter comprises a first channel; A handle assembly connected to the catheter, the handle assembly comprising a shell, the shell being provided with a cavity communicating with a first pipe of the catheter, the handle assembly comprising a movable assembly axially movably arranged in the cavity, so that the cavity has a first state that enables the catheter to perform an infusion operation and a second state that enables the catheter to perform an aspiration operation; A filling assembly, comprising a filling part, an adjusting member and a filling channel, wherein the filling part is arranged at the distal end of the catheter, the adjusting member is closer to the proximal end of the catheter than the filling part, the filling channel and the first pipe of the catheter are independent of each other, and both ends of the filling channel are connected to the filling part and the adjusting member respectively; The movable component includes a core shaft, which is located in the cavity; the handle assembly is provided with an adjustment channel connected to the filling channel, and the adjustment member includes a plug body and a traction part movably provided in the adjustment channel, one end of the traction part is fixedly connected to the plug body, and the other end of the traction part is fixedly provided on the movable component, when the cavity is in a first state, the core shaft controls the traction part to isolate the filling channel, and when the cavity is in a second state, the core shaft controls the traction part to connect the filling channel, so that the adjustment member controls the on-off of the adjustment channel to control the on-off of the filling channel, thereby controlling the expansion of the filling part.

2. The irrigation catheter according to claim 1, characterized in that The side wall of the distal end of the catheter is provided with an opening connected to the first pipe of the catheter, and the filling part is arranged adjacent to the proximal end of the opening.

3. The irrigation catheter according to claim 2, characterized in that , the opening is spaced apart from the distal end face of the catheter.

4. The irrigation catheter according to claim 1, characterized in that The adjusting member also includes an elastic body, which is sleeved on an end of the traction portion close to the plug body, and the elastic body is supported between the shell of the handle assembly and the plug body.

5. The irrigation catheter according to claim 3, characterized in that The adjusting member can be movably arranged on the handle assembly, and the adjusting member also includes an elastic body sleeved on one end of the traction part close to the plug body and a pressure cover arranged at the entrance of the adjusting channel, and there is a gap between the pressure cover and the plug body. The elastic body is supported between the shell of the handle assembly and the plug body, and an inflation port is opened on the pressure cover.

6. The irrigation catheter according to claim 5, characterized in that The regulating channel includes a main channel and an expansion channel. The filling channel can be connected to the expansion channel through the main channel. The plug body is at least partially accommodated in the expansion channel and can move relative to the main channel to control the opening and closing of the filling channel.

7. The irrigation catheter according to claim 1, characterized in that The shell includes a first shell and a second shell connected to each other, the first shell and the second shell are enclosed to form the cavity, the first shell is connected to the conduit, and the first shell is provided with an injection channel that can be connected to the cavity. In the first state, the injection channel is connected to the cavity, and the adjusting member is in a state of isolating the filling channel; in the second state, the movable component is blocked in the injection channel, and the adjusting member is in a state of connecting the filling channel.

8. An irrigation catheter system, characterized in that: It includes a bronchoscope, a collector, a negative pressure device, a gas delivery device and a liquid perfusion device, and also includes an lavage catheter as described in any one of claims 1 to 7, the bronchoscope includes a channel for the catheter to pass through, the collector is connected to the lavage catheter to collect the lavage fluid extracted when the lavage catheter performs suction work, the negative pressure device is connected to the lavage catheter through the collector, the gas delivery device has a gas delivery channel, the gas delivery channel is connected to the filling channel and can deliver gas to the filling channel, and the liquid perfusion device is connected to the lavage catheter to perfuse lavage fluid into the first channel of the catheter.

Images