Pulmonary alveolar lavage tube and pulmonary alveolar lavage device

Abstract

The utility model relates to the field of medical instruments, and provides a pulmonary alveolar lavage pipe and a pulmonary alveolar lavage device.The pulmonary alveolar lavage pipe is provided with a liquid flushing pipeline used for injecting liquid and a liquid suction pipeline used for recycling liquid, and the liquid suction pipeline is arranged outside the liquid flushing pipeline in a sleeving mode and forms a liquid suction channel; the liquid suction channel is provided with a supporting piece used for maintaining the passage state of the liquid suction channel. The liquid suction pipeline and the liquid flushing pipeline can also be coaxially arranged, so that the vortex formed during liquid flushing and liquid suction is stable and balanced, and the pressure in the pulmonary alveolar lavage pipe is kept balanced. The alveolar lavage device provided by the scheme is provided with the alveolar lavage tube, the alveolar lavage device is further provided with the three-way piece, the perfusion equipment and the lavage fluid collecting device connected with the negative pressure equipment, and the alveolar lavage tube is connected to the perfusion equipment and the lavage fluid collecting device through a fluid inlet and a fluid outlet of the three-way piece. Therefore, the alveolar focus part of a patient is flushed efficiently and accurately, and the lavage fluid sample is collected.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an alveolar lavage tube and an alveolar lavage device. Background Art

[0002] Bronchoalveolar lavage (BAL) is a new technique developed based on fiberoptic bronchoscopy. It involves using a bronchoscope to inject and then drain saline into the bronchoalveoli, collecting the available fluid on the alveolar surface for examination of its cellular components and soluble substances. BAL specimens play a crucial role in the clinical diagnosis of airway diseases and can be used to diagnose a variety of lung diseases, including alveolitis, pulmonary fibrosis, asbestosis, lung cancer, pneumocystis carinii, and pulmonary alveolar proteinosis, as well as to study the etiology, pathogenesis, treatment efficacy, and prognosis of lung diseases. BAL specimens also play a crucial role in the clinical diagnosis of airway diseases.

[0003] Alveolar lavage tubes are used to collect lavage fluid specimens from bronchoalveolar lesions. Currently used alveolar lavage tubes typically include a flushing line and a suction line, and the two are arranged side by side. In actual use, a step-by-step flushing and suction method is adopted. That is, the instrument must first be turned on the perfusion mode, and a predetermined amount of saline is perfused into the alveolar lesion site through the flushing line to allow the saline to infiltrate the alveolar lesion. Then, the suction mode is turned on and the lavage fluid is recovered through the suction line. The flushing and suction steps of this side-by-side alveolar lavage tube are cumbersome. The operator needs to operate the adjustment knob or regulating valve to switch the mode each time to perfuse saline and recover lavage fluid, which cannot achieve simultaneous flushing and suction.

[0004] In summary, it is necessary to optimize the design of existing clinical alveolar lavage equipment. Utility Model Content

[0005] In view of the above-mentioned defects or deficiencies in the prior art, the present application provides an alveolar lavage tube and an alveolar lavage device that can achieve synchronized flushing and aspiration, thereby solving the problem of complicated flushing and aspiration steps in traditional step-by-step flushing and aspiration alveolar lavage devices.

[0006] The present application provides an alveolar lavage tube and an alveolar lavage device. The alveolar lavage tube has a flushing liquid pipeline for injecting liquid and a liquid suction pipeline for recovering liquid. The proximal end of the flushing liquid pipeline is connected to a flushing interface through the liquid inlet of a three-way fitting and is connected to a perfusion device through the flushing interface; the proximal end of the liquid suction pipeline is connected to a liquid suction interface through the liquid suction port of the three-way fitting and is connected to a lavage fluid collection device connected to a negative pressure device through the liquid suction interface; the distal ends of the flushing liquid pipeline and the liquid suction pipeline are used to extend into the pulmonary bronchi, facilitating the injection of liquid into the bronchoalveoli and the derivation of the liquid in the alveolar lavage part; the liquid suction pipeline is sleeved outside the flushing liquid pipeline, and a liquid suction channel is formed between the outer wall of the flushing liquid pipeline and the inner wall of the liquid suction pipeline. The liquid suction channel is provided with a support member for maintaining the passage state of the liquid suction channel under a negative pressure state. During use, the lavage fluid injected into the alveolar lesion site can form a vortex from the flushing port of the flushing liquid pipeline towards the liquid suction port of the liquid suction pipeline, facilitating the synchronous and continuous flushing and liquid suction.

[0007] Further, the liquid suction pipeline and the flushing liquid pipeline are coaxially arranged, which is beneficial to the stability and balance of the vortex formed during flushing and liquid suction.

[0008] Further, a plurality of support members are provided, and the plurality of support members are arranged along the axis direction of the flushing liquid pipeline; optionally, the plurality of support members are evenly arranged along the circumferential direction of the flushing liquid pipeline. By adopting the above technical solution, during the flushing process, the liquid suction pipeline is evenly supported and expanded by the support members, so as to maintain the passage state of the liquid suction channel.

[0009] Further, an adsorption and blocking assembly is further provided on the outer surface of the distal end of the liquid suction pipeline. The adsorption and blocking assembly includes at least one adsorption hole. Under the liquid suction negative pressure, the adsorption hole is used to attract the patient tissue outside the liquid suction pipeline to form a blocking area, and the blocking area is used to block at least part of the liquid in the far side from flowing from the outside of the liquid suction pipeline to the near side; it can not only reduce the risk of bleeding at the suction site caused by too large negative pressure, but also play a role in blocking the overflow of the lavage fluid. Optionally, the adsorption and blocking assembly is provided with a plurality of the adsorption holes, and the plurality of adsorption holes are evenly distributed around the axis of the liquid suction pipeline to enhance the effect of blocking the overflow of the lavage fluid. Optionally, a plurality of the adsorption and blocking assemblies are provided, and the plurality of adsorption and blocking assemblies are linearly distributed along the axis direction of the liquid suction pipeline, playing the effects of multi-region blocking and forming multi-stage negative pressure.

[0010] Further, a flexible component is further included. The distal end of the flushing liquid pipeline extends beyond the liquid suction pipeline, and the flexible component is arranged at the distal end of the flushing liquid pipeline to reduce the risk of damaging the alveolar tissue during the catheter placement process.

[0011] In summary, the present application includes at least one of the following beneficial technical effects:

[0012] 1. Compared with traditional alveolar lavage instruments, in this application, the liquid suction pipeline is sleeved outside the liquid flushing pipeline, and a support member is provided between the two, so that the lavage liquid forms a vortex from the liquid flushing port of the liquid flushing pipeline towards the liquid suction port of the liquid suction pipeline, realizing synchronous liquid flushing and liquid suction, making the lavage more efficient and convenient;

[0013] 2. The liquid suction pipeline and the liquid flushing pipeline are coaxially arranged, so that the vortices formed during liquid flushing and liquid suction are stable and balanced, and the pressure in the pipeline remains balanced during liquid flushing and liquid recovery, improving the lavage efficiency;

[0014] 3. An adsorption and blocking assembly is provided on the outer wall of the liquid suction pipeline, which can achieve precise flushing of the lesion area, while reducing the overflow of the flushing liquid to non-lesion positions, improving the accuracy of the lavage site and the lavage efficiency;

[0015] 4. A flexible component is provided at the distal end of the liquid suction pipeline, which can reduce the risk of damaging alveolar tissue by the alveolar lavage tube during catheter placement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. The following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of an embodiment of the alveolar lavage device of this application;

[0018] Figure 2 Cross-sectional view of an embodiment of the alveolar lavage device of this application;

[0019] Figure 3 For Figure 1 An enlarged view of an embodiment of Region I in;

[0020] Figure 4 For Figure 2 An enlarged view of an embodiment of Region II in;

[0021] Figure 5 For Figure 3 Cross-sectional view of an embodiment of the O - O section in;

[0022] Figure 6 For Figure 5 Cross-sectional view of the flushing and suction pipelines at A - A in an embodiment;

[0023] Figure 7 For Figure 5 Cross-sectional view of the flushing and suction pipelines at B - B in an embodiment.

[0024] Description of reference numerals: 1. Alveolar lavage tube; 11. Liquid suction pipeline; 111. Liquid suction port; 112. Adsorption and blocking assembly; 1121, 1122. Adsorption holes; 12. Liquid flushing pipeline; 121. Liquid flushing port; 13. Support member; 2. Three-way fitting; 21. Liquid outlet; 22. Liquid inlet; 3. Liquid suction joint; 4. Liquid flushing joint; 5. Flexible member. Detailed implementation manners

[0025] The following further describes the present application in detail with reference to the drawings and embodiments. The embodiments described below are used to explain the present application, rather than limiting the solutions of the present application.

[0026] Regarding the problem that the alveolar lavage tube in the background art cannot achieve synchronous flushing and suction, the alveolar lavage tube provided by the present application forms a liquid suction channel by sleeving the liquid suction pipeline outside the liquid flushing pipeline, and a support member is provided in the liquid suction channel. Thus, when lavaging the lesion site, normal saline flushes out from the liquid flushing port of the liquid flushing pipeline and is immediately sucked back from the liquid suction port of the liquid suction pipeline, so that the lavage liquid forms a vortex from the liquid flushing port to the liquid suction port direction, and the operator can perform synchronous and continuous flushing and suction operations. Using such an alveolar lavage tube does not require setting a flushing and suction state adjustment knob or regulating valve, and flushing and suction can be carried out synchronously, improving the simplicity of operation and the lavage efficiency.

[0027] Referring to Figure 1 、 Figure 2 、 Figure 6 , an alveolar lavage device provided by an embodiment of the present application includes:

[0028] An alveolar lavage tube 1, which has:

[0029] A liquid suction pipeline 11, the distal end face of the liquid suction pipeline 11 has a liquid suction port 111 for sucking the lavage liquid at the lesion position of the patient's bronchoalveolar tissue, and the distal outer wall has an adsorption and blocking assembly 112 for adsorbing the patient's tissue and preventing the lavage liquid from flowing from the distal end outside the liquid suction pipeline to the proximal end;

[0030] A liquid flushing pipeline 12, the distal end face of the liquid flushing pipeline 12 has a liquid flushing port 121 for injecting normal saline into the lesion site of the patient's bronchoalveolar;

[0031] A support member 13, located between the liquid flushing pipeline 12 and the liquid suction pipeline 11, for ensuring the passage condition of the liquid suction channel;

[0032] It further includes:

[0033] A three-way fitting 2, arranged at the proximal end of the alveolar lavage tube 1, for connecting the alveolar lavage tube 1 with a perfusion device and a lavage liquid collection device;

[0034] A liquid suction joint 3, connected to the three-way fitting and the lavage liquid collection device, for leading the lavage liquid from the liquid suction pipeline 11 to the lavage liquid collection device;

[0035] The flushing liquid connector 4 is connected to the tee and the perfusion device, and is used to introduce the lavage liquid from the perfusion device into the flushing pipeline 12;

[0036] The flexible component 5 is arranged at the distal end of the liquid suction pipeline 11.

[0037] Refer to Figure 4 、 Figure 7 When using the alveolar lavage device, the operator starts the perfusion device, so that the normal saline passes through the flushing liquid connector 4 of the perfusion device, the liquid inlet 22 of the tee 2, and the flushing pipeline 12 in sequence, and is injected into the bronchial alveolar lesion site of the patient from the flushing port 121 through the flushing pipeline 12 to start lavage; at the same time, the operator starts the negative pressure device of the lavage liquid collection device, so that the lavage liquid flows from the liquid suction port 111 of the liquid suction pipeline 11 to the proximal end of the liquid suction pipeline 11, and is connected to the liquid suction connector 3 of the lavage liquid collection device through the liquid outlet 21 of the tee 2, so as to introduce the lavage liquid into the lavage liquid collection device, and thus complete the lavage of the alveolar lesion site of the patient and the collection of the lavage liquid.

[0038] Refer to Figure 5 、 Figure 6 、 Figure 7 Between the outer wall of the flushing pipeline 12 and the inner wall of the liquid suction pipeline 11 is a liquid suction channel, and the liquid suction channel is provided with a support member 13. The support member 13 is used to resist the tendency of the liquid suction pipeline 11 to shrink and fit into the flushing pipeline 12 under the liquid suction negative pressure, and ensure the passage state of the liquid suction channel during the liquid suction process, thereby reducing the risk of blockage of the liquid suction channel caused by the fitting of the inner wall of the liquid suction pipeline 11 and the outer wall of the flushing pipeline 12 due to the liquid suction negative pressure during the use of the instrument, and ensuring smoother liquid suction.

[0039] In one embodiment, the liquid suction pipeline 11 and the flushing pipeline 12 are coaxially arranged, which is beneficial to the stability and balance of the eddy currents formed during flushing and liquid suction, and ensures the balance of the pressure in the alveolar lavage tube 1.

[0040] In one embodiment, the support member 13 is arranged along the axial direction of the flushing pipeline 12. Specifically, the support member 13 can be continuously arranged at the distal end of the liquid suction channel; Refer to Figure 5 Furthermore, the liquid suction pipeline 11 and the flushing pipeline 13 are coaxial, and there are 2 symmetrically arranged support members 13, which divide the liquid suction channel into two symmetric arc-shaped channels, so as to evenly offset the shrinking tendency and deformation of the liquid suction pipeline 11 caused by the liquid suction negative pressure, and at the same time, it is also beneficial to keep the internal pressure of the liquid suction pipeline 11 relatively balanced during liquid suction.

[0041] In one embodiment, the support member 13 may also be discontinuously disposed at the distal end of the liquid suction channel. Specifically, there are a plurality of axially arranged support members 13 in a spoke shape. For example, there are more than two spoke-shaped support members 13. Each support member 13 may be composed of more than three long strips evenly distributed circumferentially around the liquid flushing pipeline 11, thereby playing a supporting role for the liquid suction channel. Preferably, the plurality of support members 13 are arranged parallel to each other in the axial direction to facilitate processing and manufacturing. Further, the support member 13 is at least 10 mm away from the end face of the distal end of the liquid flushing pipeline 12 to reduce the blocking length of the support member 13 on the liquid suction channel, thereby reducing the influence of the support member 13 on the flow rate at the liquid suction port 111.

[0042] In addition, in other embodiments, the liquid suction pipeline 11 may also be offset and sleeved outside the liquid flushing pipeline 12. In a preferred embodiment, the liquid flushing pipeline 12 is internally tangent to the liquid suction pipeline 11, that is, the outer wall of the liquid flushing pipeline 12 is joined to the inner wall of the liquid suction pipeline 11 at the internally tangent position, and an internally tangent support ridge is formed, thereby enhancing the structural stability of the alveolar lavage tube 1. Further, the support member 13 and the internally tangent support ridge are evenly arranged circumferentially around the liquid flushing pipeline 12. For example, when there is one support member 13 in the axial direction of the liquid flushing pipeline 12, the support member 13 is symmetric with the internally tangent support ridge; when there are two support members 13 in the axial direction of the liquid flushing pipeline 12, the support members and the internally tangent support ridge are arranged at 120 degrees circumferentially around the liquid flushing pipeline 12.

[0043] Refer to Figure 6 、 Figure 7 , in one embodiment, an adsorption blocking assembly 112 is further provided on the outer surface of the distal end of the liquid suction pipeline 11. The adsorption blocking assembly 112 includes at least one adsorption hole (1121, 1122). Under the liquid suction negative pressure, the adsorption hole (1121, 1122) is used to attract the patient tissue outside the liquid suction pipeline 11 to form a blocking area. The formed blocking area can resist at least part of the liquid in the far side from flowing from the outside of the liquid suction pipeline 11 to the near side, so that the injected lavage fluid is kept near the lesion site without overflowing, realizing precise lavage at the lesion site. In addition, a negative pressure can be formed at the adsorption hole (1121, 1122) by adsorbing the patient tissue, thereby correspondingly reducing the negative pressure at the liquid suction port 111 and reducing the risk of bleeding at the suction site caused by too large negative pressure at the liquid suction port 111.

[0044] Further, the adsorption blocking assembly 112 is provided with a plurality of adsorption holes (1121, 1122), and the plurality of adsorption holes (1121, 1122) are evenly distributed around the axis of the liquid suction pipeline 11 to enhance the effect of blocking the overflow of the lavage fluid. Refer to Figure 3, in one embodiment, four adsorption holes (1121, 1122) are uniformly arranged around the axis on the outer wall of the liquid suction pipeline 11. The adsorption hole 1121 is arranged perpendicular to the support member 13, and the adsorption hole 1122 is arranged parallel to the support member 13; further, the axial direction deviation between two adjacent adsorption holes (1121, 1122) is 2 - 6 mm, preferably 4 mm, so as to further expand the area of the blocking zone, and it is more beneficial for the blocking zone to resist the liquid at the far side from flowing from the outside of the liquid suction pipeline 11 to the near side.

[0045] In one embodiment, a plurality of adsorption blocking components 112 are linearly distributed along the axis direction of the liquid suction pipeline 11. Correspondingly, it can achieve the effects of multi-region blocking and forming multi-stage negative pressure. At the same time, when the adsorption blocking component 112 near the distal end of the alveolar lavage tube 1 fails to adsorb the patient's tissue, other adsorption blocking components 112 can play a certain supplementary role.

[0046] Refer to Figure 6 , Figure 7 , in one embodiment, the distal end of the flushing pipeline 12 extends beyond the liquid suction pipeline 11, and the extended distance can be 2 - 4 mm, so as to facilitate placing the flexible component 5 at the distal end of the liquid suction pipeline 11; it can be understood that the beneficial effect of this design is that when the alveolar lavage tube 1 is inserted into the alveolar bronchus, the flexible component 5 located at the distal end of the liquid suction pipeline 11 guides the alveolar lavage tube 1 to extend into and contact the bronchus, and the flexible component 5 can play a certain buffering role on the contact part, thereby reducing the risk of damaging the bronchus during the catheterization process. Therefore, the flexible component 5 capable of realizing this function is correspondingly selected, such as soft glue, etc.

[0047] Further, the three-way part 2 is adhesively bonded to the liquid suction pipeline 11 and the flushing pipeline 12 of the alveolar lavage tube 1, the liquid suction joint 3, and the flushing joint 4, and can also be fixedly connected by other means.

[0048] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present application by using the methods and technical contents disclosed above, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essence of the present application. Therefore: Any simple modification or equivalent change made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An alveolar lavage tube, having a flushing liquid pipeline for injecting liquid and a liquid suction pipeline for recovering liquid, the liquid is injected from the proximal end of the flushing liquid pipeline and is discharged from the distal end of the liquid suction pipeline after flushing, characterized in that, The liquid suction pipeline is sleeved outside the liquid flushing pipeline to form a liquid suction channel, and a support member is provided in the liquid suction channel, and the support member is used to maintain the passage state of the liquid suction channel under negative pressure.

2. The alveolar lavage tube according to claim 1, characterized in that, The liquid suction pipeline and the liquid flushing pipeline are coaxially arranged.

3. The alveolar lavage tube according to claim 1 or 2, characterized in that, The support member is arranged along the axial direction of the liquid flushing pipeline.

4. The alveolar lavage tube according to claim 3, wherein, There are multiple support members, and the multiple support members are evenly arranged along the circumferential direction of the liquid flushing pipeline.

5. The alveolar lavage tube according to claim 4, characterized in that, The support member is more than 10 mm away from the distal end face of the liquid flushing pipeline.

6. The alveolar lavage tube according to claim 1 or 2, characterized in that An adsorption blocking assembly is further provided on the outer surface of the distal end of the liquid suction pipeline. The adsorption blocking assembly includes at least one adsorption hole. Under the negative pressure of liquid suction, the adsorption hole is used to attract the patient tissue outside the liquid suction pipeline to form a blocking area, and the blocking area is used to block at least part of the liquid in the far side from flowing from the outside of the liquid suction pipeline to the near side.

7. The alveolar lavage tube according to claim 6, wherein The adsorption blocking assembly is provided with multiple adsorption holes, and the multiple adsorption holes are evenly distributed around the axis of the liquid suction pipeline.

8. The alveolar lavage tube according to claim 6, wherein, There are multiple adsorption blocking assemblies, and the multiple adsorption blocking assemblies are linearly distributed along the axial direction of the liquid suction pipeline.

9. The alveolar lavage tube according to claim 1, characterized in that, It further includes a flexible component. The distal end of the liquid flushing pipeline extends beyond the liquid suction pipeline, and the flexible component is arranged at the distal end of the liquid suction pipeline.

10. An alveolar lavage device, comprising an alveolar lavage tube according to any one of claims 1-9, characterized in that, A three-way component, a perfusion device and a lavage fluid collection device connected to a negative pressure device are further provided; the three-way component has a liquid inlet and a liquid suction port. The liquid flushing pipeline is connected to the perfusion device through the liquid inlet of the three-way component, and the liquid suction pipeline is connected to the lavage fluid collection device through the liquid suction port of the three-way component.

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