Continuous output bronchial lavage device

Abstract

The application discloses a continuously outputted bronchial lavage device, which comprises a shell, a nozzle assembly, a liquid storage cavity, a liquid inlet switching assembly, a first output pipeline, a flexible liquid storage bag and a piston assembly. The liquid storage cavity is communicated with the nozzle assembly and the flexible liquid storage bag through the first output pipeline and a catheter respectively, and a one-way valve or a check valve is arranged on each pipeline. The piston assembly is communicated with the liquid storage cavity, and alternating negative pressure and positive pressure are formed in the liquid storage cavity through reciprocating movement of the piston assembly. When the piston is pulled outwards, external liquid enters the liquid storage cavity, and the flexible liquid storage bag is pressed to output liquid to the nozzle. When the piston is pushed back, liquid in the liquid storage cavity is sprayed out through the first output pipeline, and the flexible liquid storage bag is replenished with liquid. Through the above structure, liquid pumping and liquid spraying are alternately performed, so that the continuous output of liquid is realized. The application can also realize the switching of different liquids through a three-way valve, and realize different spraying modes through various nozzle structures, and has the advantages of convenient operation, continuous output, high safety and the like.

Description

Technical Field

[0001] This invention relates to medical devices, specifically to a bronchial lavage device capable of continuous output. Background Technology

[0002] In clinical practice, critically ill patients often require the use of electronic bronchoscopes for sputum suction and lung care. During the bronchoscopic procedure, traditional irrigation methods usually require two people: one person operates the endoscope while the other manually injects saline or medications using a syringe.

[0003] This traditional intermittent operation has the following significant drawbacks:

[0004] High risk of infection: During repeated fluid extraction, the syringe needle comes into frequent contact with the outside air, which greatly increases the risk of iatrogenic infection.

[0005] High labor costs: Since it is difficult for a single person to simultaneously handle both endoscope manipulation and drug injection, an additional assistant is often required, resulting in a high consumption of medical resources and wasting time and effort.

[0006] Difficult to handle in emergencies: When a patient's sputum is too thick or the airway is not humidified enough, causing the fiberoptic bronchoscope to become blocked, if the operator cannot perform flushing in time, it will pose a serious clinical safety hazard.

[0007] Therefore, how to achieve convenient single-person operation, ensure continuous and stable liquid output, and reduce the risk of cross-infection are the technical problems that urgently need to be solved in the field of bronchoalveolar lavage. Summary of the Invention

[0008] This invention provides a continuously outputting bronchial irrigation device, the continuously outputting bronchial irrigation device comprising a housing, wherein the housing contains:

[0009] The nozzle assembly, located at one end of the housing, is used to spray liquid outwards;

[0010] A liquid storage chamber is used to store liquids;

[0011] The liquid inlet switching assembly includes a three-way valve and at least two liquid inlets. The first end of the three-way valve is connected to the liquid storage chamber, and the other two ends are respectively connected to the first liquid inlet and the second liquid inlet.

[0012] The first output pipeline has one end connected to the liquid storage chamber and the other end connected to the nozzle assembly, and a first one-way valve is provided on the first output pipeline.

[0013] A flexible liquid storage bag has one end connected to the liquid storage chamber via a conduit, and a second one-way valve is provided on the conduit. The other end of the flexible liquid storage bag is connected to the nozzle assembly via a second output pipe, and a check valve is provided on the second output pipe to prevent backflow.

[0014] A piston assembly includes a piston cylinder, a piston head, and a piston rod connected to the piston head. The piston cylinder is connected to a liquid storage chamber. The piston rod is slidably disposed within the piston cylinder. One end of the piston rod extends outward from the outer casing, and the other end of the piston rod is fixed to the piston head, which is in a sealing and slidable connection with the piston cylinder. A return spring is sleeved on the piston rod.

[0015] As the piston rod slides outward within the piston cylinder, a negative pressure is created within the liquid storage chamber. This pressure draws external liquid into the storage chamber through a three-way valve. Furthermore, the outward sliding of the piston rod compresses the flexible liquid storage bag, and the liquid within the bag is then transported to the nozzle assembly and ejected outward through the second output pipeline.

[0016] As the piston rod slides inward in the piston cylinder, it creates positive pressure in the liquid storage chamber. The liquid in the liquid storage chamber is output in two ways: the first way is transported to the nozzle assembly through the first output pipeline and sprayed outward, and the second way is transported to the flexible liquid storage bag through the conduit.

[0017] Furthermore, the second and third ends of the three-way valve are respectively connected to the first inlet and the second inlet via a third check valve;

[0018] The first and second inlet ports can be any of the following: a standard infusion set interface, a Luer connector, or a puncture device.

[0019] Furthermore, the first inlet is connected to a saline bag or an irrigation fluid bag.

[0020] The second inlet connects to a drug syringe or pre-filled drug.

[0021] Furthermore, one end of both the first and second output pipes is connected to the nozzle assembly via a T-junction.

[0022] Furthermore, the nozzle assembly includes:

[0023] A fixed plate is fixed to the end face of the outer shell, and the fixed plate has an opening that is connected to the first output pipe and the second output pipe.

[0024] A rotating disk is provided with a central rod and is rotatably connected to the fixed disk. The rotating disk is provided with multiple nozzles of different specifications in the circumferential direction.

[0025] Furthermore, the nozzle assembly also includes a disposable sterile nozzle that can be detachably mounted on a rotating disk. The outer end face of the rotating disk is provided with multiple hollow rings that are arranged around the periphery of each nozzle. The disposable sterile nozzle is fitted onto one of the hollow rings and connected to the corresponding nozzle.

[0026] Furthermore, a sealing ring is provided between the opening of the fixed plate and the rotating plate;

[0027] The various nozzle specifications include:

[0028] A single large-diameter nozzle is used for rapid, high-flow-rate injection;

[0029] A single small-aperture nozzle is used for slow, low-flow dripping; and

[0030] Multi-hole small-diameter nozzles are used to generate multiple fine streams to flush the pipe wall.

[0031] Furthermore, the fixing plate is marked with corresponding opening positions;

[0032] The edge of the rotating disk is provided with multiple racks corresponding to the positions of the large-diameter nozzle, the small-diameter nozzle, and the multi-hole small-diameter nozzle. Each rack has a different shape. By rotating the rotating disk, one of the racks is aligned with the markings, so that one of the large-diameter nozzle, the small-diameter nozzle, and the multi-hole small-diameter nozzle is connected to the opening on the fixed disk.

[0033] Furthermore, a partition is provided at one end of the outer casing away from the liquid storage chamber, and the reset spring is supported between the partition and the piston head.

[0034] Furthermore, both the conduit and the flexible liquid storage bag are located inside the piston cylinder, and both are fixed to the inner wall of the piston cylinder.

[0035] The piston head is sealed and slides in contact with the inner wall of the piston cylinder and the guide tube.

[0036] The advantages of this invention are:

[0037] 1) This invention achieves continuous liquid output by setting up a dual-channel output structure of liquid storage chamber and flexible liquid storage bag, and combining it with piston reciprocating drive to realize alternating liquid extraction and spraying, thereby avoiding the problem of intermittent liquid supply of traditional syringes.

[0038] 2) By installing one-way valves or check valves in the first output pipeline, conduit and the second output pipeline respectively, the present invention effectively prevents liquid backflow and mutual interference between different flow paths, thereby improving the stability and safety of the system.

[0039] 3) By setting a three-way valve and multiple inlets, this invention enables the switching between physiological saline and drug solution, allowing rinsing and drug administration to be completed in the same operation, thus improving the efficiency of clinical operation.

[0040] 4) This invention uses a flexible liquid storage bag as an auxiliary energy storage unit to release liquid during the piston pull-out phase and store liquid during the push-back phase, thereby achieving flow compensation and making the spray more continuous and uniform.

[0041] 5) By setting up a rotating disk and various nozzle specifications, this invention enables operators to select different spraying modes according to different clinical needs, thereby improving applicability.

[0042] 6) By setting a detachable disposable sterile nozzle, the present invention effectively reduces the risk of cross-infection and meets the requirements for sterile use of medical devices.

[0043] 7) The present invention has a high degree of structural integration, enabling single-person operation, reducing reliance on auxiliary personnel, improving ease of use and reducing operational risks. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the inward pushing of the piston in a bronchial irrigation device capable of continuous output according to the present invention.

[0046] Figure 2 This is a schematic diagram of the piston sliding outward in a bronchial irrigation device capable of continuous output according to the present invention.

[0047] Figure 3 This is a structural diagram of the nozzle assembly;

[0048] Figure 4 An exploded view of the fixed disc and rotating disc of the nozzle assembly;

[0049] Figure 5 A schematic diagram of a nozzle assembly that can be fitted with disposable sterile nozzles;

[0050] Figure 6 This is a schematic diagram of a nozzle assembly equipped with a disposable sterile nozzle.

[0051] Explanation of reference numerals in the attached figures:

[0052] 1. Outer shell; 2. Nozzle assembly; 2-1. Fixed plate; 2-2. Opening; 2-3. Rotating plate; 2-4. Nozzle; 2-4. Large-diameter nozzle; 2-41. Small-diameter nozzle; 2-42. Multi-hole small-diameter nozzle; 2-43. Disposable sterile nozzle; 2-5. Hollow ring; 2-6. Rack; 2-8. Liquid storage chamber; 3. Liquid inlet switching assembly; 4. Three-way valve; 5. Third one-way valve; 5-1. First liquid inlet; 6. Second liquid inlet; 7. First output pipeline; 8. First one-way valve; 9. Flexible liquid storage bag; 10. Conduit; 11. Second one-way valve; 12. Second output pipeline; 13. Check valve; 14. Piston assembly; 15. Piston cylinder; 16. Piston head; 17. Piston rod; 18. Return spring; 19. Three-way pipe; 20. Partition plate; 21. Detailed Implementation

[0053] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0054] To fully understand this invention, detailed steps and structures will be presented in the following description to illustrate the technical solution of this invention. Preferred embodiments of the invention are described in detail below; however, in addition to these detailed descriptions, the invention may have other embodiments.

[0055] Reference Figure 1 As shown, the present invention provides a bronchial irrigation device with continuous output. The device includes a housing 1, and multiple functional modules are integrated in the housing 1. The modules are coordinated with each other through pipelines and valves to achieve continuous output of liquid. Specifically, it includes a nozzle assembly 2, a liquid storage chamber 3, a liquid inlet switching assembly 4, a first output pipeline 8, a flexible liquid storage bag 10, and a piston assembly 15.

[0056] The nozzle assembly 2 is located at one end of the housing 1 and is used to spray the liquid delivered inside out in a preset form, thereby realizing the flushing or drug administration of the bronchus.

[0057] The liquid storage chamber 3 is used to temporarily store irrigation fluid or medicine introduced from the outside, and serves as an intermediate volume chamber during the pressure conversion process;

[0058] The liquid inlet switching assembly 4 includes a three-way valve 5 and at least two liquid inlets. The first end of the three-way valve 5 is connected to the liquid storage chamber 3, and its other two ends are respectively connected to the first liquid inlet 6 and the second liquid inlet 7, thereby realizing the selection and switching between different liquid sources.

[0059] One end of the first output pipe 8 is connected to the liquid storage chamber 3, and the other end is connected to the nozzle assembly 2. A first one-way valve 9 is provided on the first output pipe 8 to limit the liquid to flow only from the liquid storage chamber 3 to the nozzle assembly 2 and prevent backflow.

[0060] The flexible liquid storage bag 10 serves as an auxiliary liquid storage and buffer unit. One end of the bag is connected to the liquid storage chamber 3 via a conduit 11. A second one-way valve 12 is installed on the conduit 11 to ensure that liquid enters the flexible liquid storage bag 10 from the liquid storage chamber 3 in one direction. The other end of the flexible liquid storage bag 10 is connected to the nozzle assembly 2 via a second output pipe 13. A check valve 14 is installed on the second output pipe 13 to prevent liquid from flowing back into the flexible liquid storage bag 10 from the nozzle end.

[0061] The piston assembly 15 includes a piston cylinder 16, a piston head 17, and a piston rod 18 connected to the piston head 17. The piston cylinder 16 is connected to the liquid storage chamber 3. The piston rod 18 can slide back and forth inside the piston cylinder 16. One end of the piston rod 18 extends out of the outer shell 1 for the operator to drive, and the other end is fixedly connected to the piston head 17. The piston head 17 forms a sealed sliding fit with the inner wall of the piston cylinder 16. A return spring 19 is provided on the piston rod 18 to drive the piston assembly to automatically reset after the external force is released.

[0062] like Figure 2 As shown, when the piston rod 18 slides outward relative to the piston cylinder 16, the internal volume of the piston cylinder 16 increases, creating a negative pressure in the liquid storage chamber 3. This allows external liquid to be drawn into the liquid storage chamber 3 through the selected inlet via the three-way valve 5. At the same time, the outward movement of the piston rod 18 will exert a squeezing effect on the flexible liquid storage bag 10, causing the liquid already in the flexible liquid storage bag 10 to be transported to the nozzle assembly 2 and sprayed out under pressure via the second output pipe 13, thereby realizing the function of "liquid extraction and spraying".

[0063] like Figure 1 As shown, when the piston rod 18 slides inward relative to the piston cylinder 16, a positive pressure is formed in the liquid storage chamber 3. Under the pressure drive, the liquid in the liquid storage chamber 3 is divided into two outputs: one output is delivered to the nozzle assembly 2 through the first output pipeline 8 and the first one-way valve 9 and sprayed out; the other output enters the flexible liquid storage bag 10 through the conduit 11 and the second one-way valve 12, so that the flexible liquid storage bag 10 is refilled and expanded, thereby providing liquid reserves for the next cycle and realizing a continuous output cyclic working mode.

[0064] In an optional embodiment, the second and third ends of the three-way valve 5 are connected to the first inlet 6 and the second inlet 7 respectively via a third one-way valve 5-1, thereby further improving the unidirectionality and stability of the inlet process. The first inlet 6 and the second inlet 7 can be any of a standard infusion set interface, a Luer connector, or a puncture device, facilitating universal connection with existing medical devices and improving the device's adaptability and practicality. By switching the three-way valve 5, rapid switching between saline solution and medication can be achieved. The three-way valve 5 can be a manual valve or an electrically controlled valve, allowing the liquid from the first inlet 6 and / or the second inlet 7 to be delivered into the reservoir 3.

[0065] In an optional embodiment, the first inlet 6 is connected to a saline bag or irrigation fluid bag to provide basic flushing fluid; the second inlet 7 is connected to a drug syringe or pre-filled drug to achieve quantitative drug administration, thereby meeting the usage needs of different clinical scenarios.

[0066] In an optional embodiment, one end of the first output pipe 8 and the second output pipe 13 are both connected to the nozzle assembly 2 via a three-way pipe 20, thereby enabling the two liquids to be delivered to the nozzle assembly 2 simultaneously.

[0067] In an alternative embodiment, such as Figure 3-4 As shown, the nozzle assembly 2 includes a fixed disk 2-1 and a rotating disk 2-3. The fixed disk 2-1 is fixedly mounted on the end face of the housing 1, and has an opening 2-2 through it, which is connected to the first output pipe 8 and the second output pipe 13 respectively; the rotating disk 2-3 is located outside the fixed disk 2-1 and is rotatably connected to the fixed disk 2-1 through a central rod. The rotating disk 2-3 has multiple nozzles 2-4 of different specifications along the circumferential direction, so that different spraying modes can be switched by rotation.

[0068] In an optional embodiment, a sealing ring is provided between the opening 2-2 of the fixed disk 2-1 and the rotating disk 2-3, thereby maintaining good sealing performance during the rotation switching of the nozzle, preventing liquid leakage, and improving the safety and reliability of the device.

[0069] In an alternative embodiment, such as Figure 4 As shown, the various nozzle specifications 2-4 include a single large-diameter nozzle 2-41, a single small-diameter nozzle 2-42, and a multi-hole small-diameter nozzle 2-43. The large-diameter nozzle is used for rapid, high-flow-rate injection, suitable for dispersing blood clots or diluting high-viscosity secretions; the small-diameter nozzle is used for low-flow, fine dripping, suitable for local drug administration or continuous humidification; the multi-hole nozzle is used to form multiple fine streams to flush the tube wall from multiple directions, improving the cleaning effect.

[0070] In an optional embodiment, the fixed disk 2-1 is provided with a marking structure corresponding to the opening 2-2. The marking structure can be set on the outer diameter surface of the fixed disk 2-1 at the position corresponding to the opening 2-2. The edge of the rotating disk 2-3 is provided with multiple racks 2-8 corresponding to different nozzle positions, and each rack has a different shape (e.g., distinguished by rack size, number of racks, etc.). By rotating the rotating disk 2-3, the corresponding rack is aligned with the marking, thereby realizing the positioning of the nozzle and connecting the selected nozzle with the opening of the fixed disk, improving the intuitiveness and accuracy of the operation.

[0071] Furthermore, such as Figure 5-6 As shown, the nozzle assembly 2 also includes a disposable sterile nozzle 2-5 that can be detachably mounted on the rotating disk 2-3. The outer end face of the rotating disk 2-3 is provided with multiple hollow rings 2-6 corresponding to each nozzle 2-4. The disposable sterile nozzle 2-5 can be fitted onto any hollow ring 2-6 and connected to the corresponding nozzle, thereby ensuring sterility while enabling convenient replacement and reducing the risk of cross-infection.

[0072] In an optional embodiment, a partition 21 is provided at the end of the housing 1 away from the liquid storage chamber 3, and a return spring 19 is supported between the partition 21 and the piston head 17, thereby providing a stable return force for the piston assembly and limiting the installation position of the spring to improve structural stability.

[0073] Furthermore, both the conduit 11 and the flexible liquid storage bag 10 are disposed inside the piston cylinder 16 and are fixed to the inner wall of the piston cylinder 16. The piston head 17 forms a sealed sliding fit with the inner wall of the piston cylinder 16 and the conduit 11. The conduit 11 is preferably a rigid conduit, one end of which extends into the interior of the flexible liquid storage bag 10 to ensure that the liquid can fully enter the interior of the bag, and the other end is connected to the liquid storage chamber 3, thereby forming a stable liquid transmission path.

[0074] In practical use, the disposable sterile nozzle of the irrigation device is connected to the irrigation channel of the bronchoscope. When the operator pulls the piston rod outward, the return spring 19 is compressed, creating a negative pressure in the reservoir 3, allowing external liquid to enter the reservoir through the three-way valve; simultaneously, the flexible reservoir bag 10 is compressed, squeezing out the liquid inside and spraying it out through the second output line. Then, the piston rod is released, and under the action of the return spring 19, the piston moves inward, and the liquid in the reservoir is sprayed out through the first output line, while some liquid enters the flexible reservoir bag, causing it to refill and expand. Through this reciprocating operation, the alternation of liquid extraction and spraying is achieved, thus achieving continuous liquid output.

[0075] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.

Claims

1. A continuously outputting bronchial irrigation device, the continuously outputting bronchial irrigation device comprising a housing, characterized in that, The outer casing contains: The nozzle assembly, located at one end of the housing, is used to spray liquid outwards; A liquid storage chamber is used to store liquids; The liquid inlet switching assembly includes a three-way valve and at least two liquid inlets. The first end of the three-way valve is connected to the liquid storage chamber, and the other two ends are respectively connected to the first liquid inlet and the second liquid inlet. The first output pipeline has one end connected to the liquid storage chamber and the other end connected to the nozzle assembly, and a first one-way valve is provided on the first output pipeline. A flexible liquid storage bag has one end connected to the liquid storage chamber via a conduit, and a second one-way valve is provided on the conduit. The other end of the flexible liquid storage bag is connected to the nozzle assembly via a second output pipe, and a check valve is provided on the second output pipe to prevent backflow. A piston assembly includes a piston cylinder, a piston head, and a piston rod connected to the piston head. The piston cylinder is connected to a liquid storage chamber. The piston rod is slidably disposed within the piston cylinder. One end of the piston rod extends outward from the outer casing, and the other end of the piston rod is fixed to the piston head, which is in a sealing and slidable connection with the piston cylinder. A return spring is sleeved on the piston rod. As the piston rod slides outward within the piston cylinder, a negative pressure is created within the liquid storage chamber. This pressure draws external liquid into the storage chamber through a three-way valve. Furthermore, the outward sliding of the piston rod compresses the flexible liquid storage bag, and the liquid within the bag is then transported to the nozzle assembly and ejected outward through the second output pipeline. As the piston rod slides inward in the piston cylinder, it creates positive pressure in the liquid storage chamber. The liquid in the liquid storage chamber is output in two ways: the first way is transported to the nozzle assembly through the first output pipeline and sprayed outward, and the second way is transported to the flexible liquid storage bag through the conduit.

2. The continuously outputting bronchial irrigation device according to claim 1, characterized in that, The second and third ends of the three-way valve are respectively connected to the first inlet and the second inlet via a third check valve; The first and second inlet ports can be any of the following: a standard infusion set interface, a Luer connector, or a puncture device.

3. The continuously outputting bronchial irrigation device according to claim 1 or 2, characterized in that, The first inlet is connected to a saline bag or an irrigation solution bag. The second inlet connects to a drug syringe or pre-filled drug.

4. The continuously outputting bronchial irrigation device according to claim 1, characterized in that, One end of both the first and second output pipes is connected to the nozzle assembly via a T-junction.

5. The continuously outputting bronchial irrigation device according to claim 1, characterized in that, The nozzle assembly includes: A fixed plate is fixed to the end face of the outer shell, and the fixed plate has an opening that is connected to the first output pipe and the second output pipe. A rotating disk is provided with a central rod and is rotatably connected to the fixed disk. The rotating disk is provided with multiple nozzles of different specifications in the circumferential direction.

6. The continuously outputting bronchial irrigation device according to claim 5, characterized in that, The nozzle assembly also includes a disposable sterile nozzle that can be detachably mounted on a rotating disk. The outer end face of the rotating disk is provided with multiple hollow rings that are arranged around the periphery of each nozzle. The disposable sterile nozzle is fitted onto one of the hollow rings and connected to the corresponding nozzle.

7. The continuously outputting bronchial irrigation device according to claim 5, characterized in that, A sealing ring is provided between the opening of the fixed plate and the rotating plate; The various nozzle specifications include: A single large-diameter nozzle is used for rapid, high-flow-rate injection; A single small-aperture nozzle is used for slow, low-flow dripping. as well as Multi-hole small-diameter nozzles are used to generate multiple fine streams to flush the pipe wall.

8. The continuously outputting bronchial irrigation device according to claim 7, characterized in that, The fixed plate is marked with corresponding opening positions; The edge of the rotating disk is provided with multiple racks corresponding to the positions of the large-diameter nozzle, the small-diameter nozzle, and the multi-hole small-diameter nozzle. Each rack has a different shape. By rotating the rotating disk, one of the racks is aligned with the markings, so that one of the large-diameter nozzle, the small-diameter nozzle, and the multi-hole small-diameter nozzle is connected to the opening on the fixed disk.

9. The continuously outputting bronchial irrigation device according to claim 1, characterized in that, A partition is provided at one end of the outer casing away from the liquid storage chamber, and the reset spring is supported between the partition and the piston head.

10. The continuously outputting bronchial irrigation device according to claim 1, characterized in that, The conduit and flexible reservoir bag are both located inside the piston cylinder, and both are fixed to the inner wall of the piston cylinder. The piston head is sealed and slides in contact with the inner wall of the piston cylinder and the guide tube.

Images