Bronchoalveolar lavage fluid specimen collecting device
By designing a bronchial alveolar lavage fluid collection device with shunt tubes and closures, the problems of specimen leakage and contamination are solved, stable placement and simplified operation are achieved, and detection accuracy of ICU patients is improved.
Patent Information
- Application Number
- CN202520783807.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2035-04-24
AI Technical Summary
The existing bronchial alveolar lavage fluid collection device is prone to specimen leakage and contamination during operation, especially in the ICU environment, which affects the accuracy of the detection results.
A bronchial alveolar lavage fluid sample collection device is designed, including a shunt tube, a closure and a base, through which the lavage fluid is directly transferred to the centrifugal test tube without opening the bottle cap, combining the hook and base to achieve stable placement and simplified operation.
Effectively prevent specimen leakage and contamination, simplify operation procedures, improve the accuracy of test results, and is suitable for specimen collection in critically ill patients in ICU.
Smart Images
Figure CN223081687U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical appliances, and particularly relates to a specimen collection device for bronchoalveolar lavage fluid. Background Technique
[0002] Bronchoalveolar lavage fluid (BALF) is the exudate on the surface of the lung mucosa collected after lavaging the lung segments and sub-lung segments below the bronchi during fiberoptic bronchoscopy.
[0003] The standardized collection and submission process of bronchoalveolar lavage fluid is a prerequisite for obtaining correct microbiological and cytological results of BALF. Results obtained through inappropriate operation methods are prone to misleading clinical diagnosis and treatment. Compared with general wards and patients with relatively stable conditions, the microecology in the ICU environment is more complex, and there are more opportunities for specimen collection and submission to be contaminated. Therefore, the acquisition, timely submission, standardized detection, and correct interpretation of the results of qualified BALF in critically ill patients in the ICU directly affect the diagnosis and treatment of patients and directly determine the prognosis of patients. When collecting samples, the first tube of BALF may be mixed with pathogenic bacteria at non-lesion sites, affecting the test results. It is recommended to collect the middle segment (the second tube) of the sample for pathogenic microorganism testing.
[0004] Currently, most of the existing traditional alveolar lavage fluid collection devices use collection bottles, which have the following disadvantages:
[0005] 1. The traditional collection bottle includes a bottle body, the top of the bottle body has a bottle cap, and the bottle cap has a negative pressure tube and a drainage tube; when the collected bronchoalveolar lavage fluid specimen is submitted for inspection, it is necessary to open the lid to transfer the lavage fluid into a centrifuge tube. This step is relatively cumbersome, prone to specimen leakage, and easy to cause specimen contamination and environmental pollution around.
[0006] 2. As mentioned above, the first tube of BALF in critically ill patients in the ICU may be mixed with pathogenic bacteria at non-lesion sites, affecting the test results. It is recommended to collect the middle segment (the second tube) of the sample for pathogenic microorganism testing; when using the existing collection bottle to perform this step, it is necessary to replace the collection bottle, and the lavage fluid remaining at the port of the drainage tube is likely to overflow to the external environment during the replacement process, which has certain drawbacks. Content of the Utility Model
[0007] In order to solve the problems existing in the above background technique, the utility model proposes a specimen collection device for bronchoalveolar lavage fluid.
[0008] The technical solution for the utility model to solve the technical problem is:
[0009] The utility model provides a specimen collection device for bronchoalveolar lavage fluid, which comprises a bottle body. A bottle cap is connected to the top of the bottle body. A negative pressure pipe joint and a drainage pipe joint are arranged on the bottle cap. The top end of a shunt pipe communicates with the bottom of the bottle body at the bottom of the bottle body. The device further comprises a base for placing the bottle body. The base is in an inverted "U" shape as a whole, and a notch is formed in the middle of the base. A through hole is formed in the top of the base. The bottom end of the shunt pipe penetrates through the through hole and enters the notch to form a storage structure. A closable closure is arranged on the shunt pipe.
[0010] Preferably, an installation hole is formed in the bottom of the bottle. A hollow bolt is inserted into the installation hole. A nut is threadedly connected to the hollow bolt. The head of the hollow bolt and the nut are respectively positioned on both sides of the bottom of the bottle. A pagoda joint is arranged at the bottom end of the hollow bolt. The bottom end of the shunt pipe is detachably connected to the pagoda joint.
[0011] Preferably, a hook used in cooperation with the base is further included. The hook comprises a horizontal support portion, a vertical connection portion and a hook portion. The bottom end of the vertical connection portion is perpendicularly connected to the horizontal support portion. The top end of the vertical connection portion is connected to the hook portion. The horizontal support portion is detachably connected to the base. Two cross braces are further arranged in parallel above the horizontal support portion. One end of each cross brace is fixedly connected to the vertical connection portion, and the other end penetrates through the side wall of the base and extends into the notch. The diameter of the through hole is larger than the outer diameter of the bottle body. The bottom of the bottle body passes through the through hole and is pressed above the cross braces. The through hole forms a circumferential limit for the bottle body.
[0012] Preferably, opposite hole grooves are formed in the two side walls of the base. A slot is formed at one end of the horizontal support portion away from the vertical connection portion. One end of the horizontal support portion penetrates through the hole groove, and the slot extends outside the base. A lock pin is further included. The lock pin is adaptively inserted into the slot to achieve positioning. The horizontal support portion located in the notch forms a support surface. The shunt pipe and the closure are placed above the support surface.
[0013] Preferably, a guide hole is formed in one side wall of the base. A blind hole is formed in the other side wall of the base. The blind hole is correspondingly arranged with the guide hole. One end of the cross brace penetrates through the guide hole and is inserted into the blind hole.
[0014] Preferably, the base is made of acrylic board.
[0015] Preferably, the hook is made of stainless steel.
[0016] Preferably, the closer includes a first cylinder and a second cylinder. The inside of the first cylinder is hollow, and the second cylinder is slidably sleeved on the first cylinder. A return spring is connected to the bottom of the second cylinder, and the bottom end of the return spring is connected to the inner bottom of the first cylinder. The first cylinder has hole a, and the second cylinder has hole b. Hole a and hole b are arranged correspondingly. One end of the shunt tube passes through hole a and hole b. Under the elastic force of the return spring, hole a and hole b are misaligned to clamp the shunt tube, so that the shunt tube is closed.
[0017] Preferably, the material of the bottle body is silicone-coated glass or polypropylene.
[0018] Preferably, both the hollow screw and the nut are made of plastic.
[0019] The above technical solution has the following advantages or beneficial effects:
[0020] 1. By setting a shunt tube, a closer and a matching base in the present utility model, when the collected bronchoalveolar lavage fluid specimen is sent for inspection, the lavage fluid can be transferred to a centrifuge tube by opening the closer, without the need to open the lid again, which simplifies the operation steps and can effectively solve the problems that the original operation method is prone to specimen leakage, specimen contamination and environmental pollution around.
[0021] 2. With the adoption of this collection device, the lavage fluid in the first tube can be directly emptied by using the shunt tube, and then convenient conditions are provided for collecting the middle-section sample, so that there is no need to replace the collection bottle again, effectively preventing the lavage fluid remaining at the drainage tube port from easily overflowing to the external environment during the process of opening the bottle cap when replacing. The present utility model is easy to collect specimens, without the need to transfer specimens and replace containers multiple times, simplifies the process and steps of specimen collection and subsequent inspection, and makes the inspection results more accurate.
[0022] 3. By designing structures such as a hook and a cross brace in the present utility model, not only the hanging function can be realized, but also the stable placement function of the bottle body is realized, making the two form an organic unified whole; moreover, the overall structure is simple, without complex structures, and is neat, simple and practical. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model.
[0024] Figure 1 is a perspective view of the bronchoalveolar lavage fluid specimen collection device proposed by the present utility model.
[0025] Figure 2 is Figure 1 the front view of the bronchoalveolar lavage fluid specimen collection device in
[0026] Figure 3 yes Figure 1 Schematic diagram of the structure of the bronchoalveolar lavage fluid specimen collection device during assembly.
[0027] Figure 4 It is a three-dimensional diagram of the structure of the hook.
[0028] Figure 5 It is an exploded view of the bottle body, hollow bolt and diverter pipe.
[0029] Figure 6 This is an exploded view of the closer.
[0030] Figure 7 It is a schematic diagram of the structure of the bronchoalveolar lavage fluid specimen collection device when it is hung.
[0031] Description of reference numerals:
[0032] 1. Bottle body; 101. Mounting hole; 2. Bottle cap; 3. Negative pressure pipe joint; 4. Drainage pipe joint; 5. Base; 51. Through hole; 52. Hole groove; 53. Blind hole; 54. Guide hole; 6. Diverter tube; 7. Closer; 71. First column; 711. Hole a; 72. Second column; 721. Hole b; 73. Reset spring; 8. Hook; 81. Horizontal support part; 811. Slot; 82. Vertical connection part; 83. Hook part; 9. Horizontal support; 10. Centrifuge test tube; 11. Lock pin; 12. Hollow bolt; 13. Nut; 14. Pagoda joint; 15. Base; 16. Hanging plate. DETAILED DESCRIPTION
[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0034] Example 1:
[0035] like Figure 1 - Figure 7As shown in the figure, this embodiment proposes a bronchoalveolar lavage fluid specimen collection device, which includes a bottle body 1. The material of the bottle body 1 can be silicone-coated glass or polypropylene. The top of the bottle body 1 is connected with a bottle cap 2, and the bottle cap 2 and the bottle body 1 adopt a detachable connection method, such as screw connection, plug connection or snap connection, etc. A negative pressure pipe joint 3 and a drainage pipe joint 4 are arranged on the bottle cap 2. Among them, the negative pressure pipe joint 3 is connected to a negative pressure generator through a pipeline, and the drainage pipe joint 4 is connected to a bronchoalveolar lavage device through a pipeline. Under the negative pressure action of the negative pressure generator, the lavage fluid can be sucked into the bottle body 1. The top end of a shunt pipe 6 is communicated with the bottom of the bottle body 1 at the bottom of the bottle body 1, and the shunt pipe 6 plays a role of emptying and shunting.
[0036] In the above design, a shunt pipe 6 is added to the bottom of the bottle bottom. Although the shunt and emptying functions are increased, which is beneficial to the pouring out of the lavage fluid, it also changes the originally flat bottom surface of the bottle body 1, resulting in the bottle body 1 being unable to be placed normally and will fall over. In order to make the best of both worlds, further optimization and improvement are made:
[0037] The whole device further includes a base 5 for placing the bottle body 1. The base 5 is of an inverted "U" shape as a whole, which includes a top plate and two side plates connected to the top plate. A notch is formed in the middle of the base 5 as a receiving cavity, which can be used to store items. A through hole 51 is opened at the top of the base 5, and the through hole 51 is communicated with the receiving cavity. The bottom end of the shunt pipe 6 passes through the through hole 51 and enters the notch to form a storage structure. In this embodiment, the aperture of the through hole 51 can be slightly larger than the diameter of the shunt pipe 6. During use, the bottle body 1 is directly placed on the top of the base 5, and the shunt pipe 6 passes through the through hole 51 and enters the notch. The normal placement of the bottle body 1 can be realized by using the base 5, meeting the normal use requirements, and realizing the normal flat placement function while retaining the shunt function.
[0038] In order to facilitate the control of the opening and closing of the shunt pipe 6, an openable and closable closure 7 is arranged on the shunt pipe 6. The closure 7 can adopt existing items such as clips, spring clamps, Robert stopcocks, etc., and can also adopt the following structure:
[0039] Specifically refer to the appendix Figure 6 , Figure 6It is an exploded view of the closer 7. The closer 7 includes a first cylinder 71 and a second cylinder 72. The interior of the first cylinder 71 is hollow, and its cross-sectional shape is a U-shaped structure. The second cylinder 72 is slidably sleeved on the first cylinder 71. The top of the second cylinder 72 is located above the first cylinder 71 for pressing use. A return spring 73 is connected to the bottom of the second cylinder 72, and the bottom end of the return spring 73 is connected to the inner bottom of the first cylinder 71. When the second cylinder 72 is pressed, the return spring 73 can be compressed to realize the relative sliding of the first cylinder 71 and the second cylinder 72. The first cylinder 71 has a hole a711, and the second cylinder 72 has a hole b721. Both the hole a711 and the hole b721 are through holes 51. The hole a711 and the hole b721 are arranged correspondingly. When the second cylinder 72 is pressed to a certain extent, the hole a711 and the hole b721 can coincide. One end of the shunt tube 6 passes through the hole a711 and the hole b721. Under the elastic force of the return spring 73, the hole a711 and the hole b721 are misaligned to clamp the shunt tube 6, closing the shunt tube 6. When shunting is needed, the second cylinder 72 is pressed, the return spring 73 is compressed, and the shunt tube 6 is no longer clamped, realizing the flow-through.
[0040] In this embodiment, the base 5 can be made of acrylic board, which has good surface hardness and gloss, large processing plasticity, and has the advantages of light weight, low price, easy molding, excellent weather resistance, etc.
[0041] Application effect:
[0042] By setting the shunt tube 6, the closer 7 and the adapted base 5, when the collected alveolar lavage fluid specimen is sent for inspection, the lavage fluid can be transferred to the centrifuge tube 10 by opening the closer 7 without opening the lid again, simplifying the operation steps, and effectively solving the problems that the original operation method is prone to specimen leakage, specimen contamination and environmental pollution around.
[0043] In addition, the first tube of BALF of ICU critically ill patients may be mixed with pathogenic bacteria at non-lesion sites, affecting the test results. It is recommended to collect the middle segment (the second tube) sample for pathogenic microorganism inspection. Using the collection device in this embodiment, the lavage fluid in the first tube can be directly emptied by the shunt tube 6, and then convenient conditions are provided for collecting the middle segment sample, so that there is no need to replace the collection bottle again, effectively preventing the lavage fluid remaining at the drainage tube port from easily overflowing to the external environment during the process of opening the bottle cap 2 when replacing.
[0044] This device is easy to collect specimens, without the need to transfer specimens and replace containers multiple times, simplifying the process and steps of specimen collection and subsequent inspection, and making the test results more accurate.
[0045] Example 2:
[0046] In the above embodiment, in order to facilitate manufacturing, the connection between the shunt pipe 6 and the bottle bottom can be realized by adopting the following structure:
[0047] Specific reference Figure 5 , Figure 5 FIG. 1 is an exploded view of the bottle body 1, the hollow bolt 12 and the diverter pipe 6. Figure 5 As shown, a mounting hole 101 is provided at the bottom of the bottle, a hollow bolt 12 is inserted into the mounting hole 101, a nut 13 is threadedly connected to the hollow bolt 12, the head of the hollow bolt 12 and the nut 13 are respectively positioned at both sides of the bottom of the bottle to achieve fixation; a pagoda joint 14 is provided at the bottom end of the hollow bolt 12, the pagoda joint 14 and the hollow bolt 12 form a flow passage, and the bottom end of the shunt pipe 6 is detachably connected to the pagoda joint 14. With the above structure, the existing bottle body 1 can be processed and modified, and only a hole is needed for installation, so that low-cost application can be achieved, and the practicability is high.
[0048] In this embodiment, the hollow screw and the nut 13 are both made of plastic material, which is low in cost and light in weight.
[0049] By adopting the hollow bolt 12, it is convenient to process and manufacture, and a sealed connection can be achieved. It is easy to assemble and has low cost. The built-in pagoda joint 14 is also convenient to be plugged into the shunt pipe 6. The present structure is suitable for the processing and manufacturing of a new bottle body 1, and is also suitable for the transformation of an old bottle body 1. It has a wide range of applications and few limitations.
[0050] Example 3:
[0051] Continue to refer Figure 1 - Figure 7 Although the two embodiments above have achieved the basic diversion function, there are still two problems when the bottle body 1 is placed on the base 5. One is that the bottle body 1 is placed on the upper surface of the base 5. Due to the lack of a limiter, there may be an instability problem. If a limiter component is added, this problem can be solved, but it will make the entire device look bloated and redundant, increasing the complexity of the device. The second is that sometimes the bottle body 1 and the base 5 need to be hung, but the above embodiment does not have a hanging function, resulting in the disadvantage of inconvenient hanging.
[0052] In view of the above two problems, how to unify the planning and effectively combine them to realize both the hanging function and the stable placement function of the bottle body 1 so that the two form an organic unified whole is necessary for further research. In this regard, the following optimizations are made:
[0053] The entire device also includes a hook 8 used in conjunction with the base 5. The hook 8 has not only a hanging function, but also a supporting and limiting function.
[0054] The hook 8 includes a horizontal support portion 81, a vertical connection portion 82, and a hook portion 83; the bottom end of the vertical connection portion 82 is perpendicularly connected to the horizontal support portion 81, and the top end of the vertical connection portion 82 is connected to the hook portion 83; the horizontal support portion 81, the vertical connection portion 82, and the hook portion 83 can be integrally formed.
[0055] The horizontal support portion 81 is detachably connected to the base 5, that is, the entire hook 8 can be detachably connected to the base 5; above the horizontal support portion 81, two cross braces 9 are also provided in parallel. One end of the cross brace 9 is fixedly connected to the vertical connection portion 82, and the other end passes through the side wall of the base 5 and extends into the slot. The cross brace 9 is a cantilever structure; in this embodiment, the diameter of the through hole 51 is greater than the outer diameter of the bottle body 1; the bottom of the bottle body 1 passes through the through hole 51 and is pressed above the cross brace 9. The cross brace 9 is used to support the bottom of the bottle. The shunt tube 6 passes through the gap between the two cross braces 9, and the through hole 51 forms a circumferential limit for the bottle body 1. With this structure, it is equivalent to lowering the bottom of the bottle, and the support and limit of the bottle body 1 are realized by using the through hole 51 and the cross brace 9, effectively ensuring the stability during placement. In this way, both the hanging function and the stable placement function of the bottle body 1 are realized, making the two form an organic unified whole; moreover, the overall structure is simple, without complex structures, and is neat and simple.
[0056] Next, the specific connection method between the base 5 and the hook 8 will be further elaborated:
[0057] Opposite hole slots 52 are provided on the two side walls of the base 5, and a slot 811 is provided at one end of the horizontal support portion 81 away from the vertical connection portion 82; one end of the horizontal support portion 81 passes through the hole slot 52, and the slot 811 extends outside the base 5; a locking pin 11 is also included. The locking pin 11 is adaptively inserted into the slot 811 for positioning. Inserting the locking pin 11 into the slot 811 can realize the left and right limits of the horizontal support portion 81 and prevent it from detaching; the horizontal support portion 81 located in the slot forms a support surface, and the shunt tube 6 and the closer 7 are placed above the support surface. This part of the support surface can also be used to place other items, such as centrifuge tubes 10, etc., and has a certain storage space function.
[0058] A guide hole 54 is provided on one side wall of the base 5; a blind hole 53 is provided on the other side wall of the base 5, and the blind hole 53 is correspondingly arranged with the guide hole 54; one end of the cross brace 9 passes through the guide hole 54 and is inserted into the blind hole 53, and the blind hole 53 can be used to support and position the end of the cross brace 9.
[0059] In this embodiment, the material of the hook 8 can be stainless steel.
[0060] As Figure 7 shown, Figure 7It is a schematic structural diagram of the bronchoalveolar lavage fluid specimen collection device when it is hung. During use, the hanging plate 16 is installed on the base body 15 in advance. The base body 15 can be an object such as a bed or a table. The hanging plate 16 and the base body 15 can be fixed by bolting. There is a certain gap between the hanging plate 16 and the base body 15, and the hook part 83 of the hook 8 can be hung at this gap.
[0061] It should be noted that the hook 8, the base 5, and the closer 7 in this embodiment can be reused multiple times, which can reduce costs.
[0062] Referring to "embodiment" in this article means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.
[0063] Although the specific implementation manners of the utility model are described above in conjunction with the accompanying drawings, it is not a limitation on the protection scope of the present utility model. Based on the technical solutions of the present utility model, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the present utility model.
Claims
1. A bronchoalveolar lavage fluid specimen collection device, comprising a bottle body (1), a bottle cap (2) is connected to the top of the bottle body (1), a negative pressure pipe joint (3) and a drainage pipe joint (4) are arranged on the bottle cap (2), and it is characterized in that, The bottom of the bottle body (1) is connected to the top of the shunt tube (6); the bottle body (1) also includes a base (5) for placing the bottle body (1); the base (5) is an inverted "U"-shaped structure as a whole, and a notch is formed in the middle of the base (5); a through hole (51) is opened at the top of the base (5), and the bottom end of the shunt tube (6) passes through the through hole (51) and enters the notch to form a storage structure; and an openable and closable closer (7) is provided on the shunt tube (6).
2. The bronchoalveolar lavage fluid specimen collection device according to claim 1, wherein The bottle bottom is provided with a mounting hole (101), a hollow bolt (12) is inserted into the mounting hole (101), a nut (13) is threadedly connected to the hollow bolt (12), and the head of the hollow bolt (12) and the nut (13) are respectively positioned at two sides of the bottle bottom; a pagoda joint (14) is provided at the bottom end of the hollow bolt (12), and the bottom end of the diverter pipe (6) is detachably connected to the pagoda joint (14).
3. The bronchoalveolar lavage fluid specimen collection device according to claim 1, wherein The invention also comprises a hook (8) for use with the base (5), the hook (8) comprising a transverse supporting portion (81), a vertical connecting portion (82) and a hook portion (83); the bottom end of the vertical connecting portion (82) is vertically connected to the transverse supporting portion (81); the top end of the vertical connecting portion (82) is connected to the hook portion (83); the transverse supporting portion (81) is detachably connected to the base (5); two transverse braces (9) are arranged in parallel above the transverse supporting portion (81), one end of the transverse brace (9) is fixedly connected to the vertical connecting portion (82), and the other end passes through the side wall of the base (5) and extends into the notch; the diameter of the through hole (51) is larger than the outer diameter of the bottle body (1); the bottom of the bottle body (1) passes through the through hole (51) and is pressed above the transverse brace (9), and the through hole (51) forms a circumferential limit for the bottle body (1).
4. The bronchoalveolar lavage fluid specimen collection device according to claim 3, characterized in that, The side walls of the base (5) are provided with opposite holes (52), and one end of the transverse support portion (81) away from the vertical connection portion (82) is provided with a slot (811); one end of the transverse support portion (81) passes through the hole (52), and the slot (811) extends outside the base (5); and the base (5) further comprises a locking pin (11), the locking pin (11) being adapted to be plugged into the slot (811) to achieve positioning; the transverse support portion (81) located in the slot forms a supporting surface, and the shunt pipe (6) and the closer (7) are placed above the supporting surface.
5. The bronchoalveolar lavage fluid specimen collection device according to claim 4, characterized in that, A guide hole (54) is provided on one side wall of the base (5); a blind hole (53) is provided on the other side wall of the base (5), and the blind hole (53) and the guide hole (54) are arranged correspondingly; one end of the cross brace (9) passes through the guide hole (54) and is inserted into the blind hole (53).
6. The bronchoalveolar lavage fluid specimen collection device according to claim 1, wherein, The base (5) is made of an acrylic plate.
7. The bronchoalveolar lavage fluid specimen collection device according to claim 3, wherein, The hook (8) is made of stainless steel.
8. The bronchoalveolar lavage fluid specimen collection device according to claim 1, characterized in that, The closer (7) includes a first cylinder (71) and a second cylinder (72). The interior of the first cylinder (71) is hollow, and the second cylinder (72) is slidably sleeved with the first cylinder (71). A return spring (73) is connected to the bottom of the second cylinder (72), and the bottom end of the return spring (73) is connected to the inner bottom of the first cylinder (71). The first cylinder (71) has a hole a (711), and the second cylinder (72) has a hole b (721). The hole a (711) and the hole b (721) are correspondingly arranged. One end of the shunt tube (6) passes through the hole a (711) and the hole b (721). Under the elastic force of the return spring (73), the hole a (711) and the hole b (721) are misaligned to clamp the shunt tube (6), closing the shunt tube (6).
9. The bronchoalveolar lavage fluid specimen collection device according to claim 1, wherein The material of the bottle body (1) is silicone-coated glass or polypropylene.
10. The bronchoalveolar lavage fluid specimen collection device according to claim 2, wherein Both the hollow bolt (12) and the nut (13) are made of plastic material.