Negative pressure sputum suction equipment for patient lung nursing

By designing blanks and moving components in negative pressure suction equipment, the automatic storage of the catheter and the patient's free coughing are achieved, which solves the problems of cough discomfort and poor usage experience caused by catheter insertion in existing equipment, and improves the safety and convenience of the equipment.

CN119971166AInactive Publication Date: 2025-05-13SICHUAN CANCER HOSPITAL
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202510231474.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-28
Publication Date
2025-05-13
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

During the use of existing negative pressure suction equipment, insertion of catheter into the lungs can easily cause patients to cough, and it is difficult to remove the catheter in time, which has poor usage experience and may lead to dangerous situations.

Method used

A negative pressure sputum suction device is designed, using a combination of a baffle and a moving component. The baffle is installed slidingly in the sputum storage cavity and sealed through a sealing groove and a sealing sheet. When the baffle moves, the catheter will be stored in the sputum storage cavity. The patient can cough freely and the sputum is inhaled into the sputum storage cavity.

Benefits of technology

It is achieved that the patient can cough freely during the suction process, and the coughed sputum is effectively inhaled, avoiding discomfort and danger caused by catheter insertion, and improving the user experience.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119971166A_ABST
    Figure CN119971166A_ABST
Patent Text Reader

Abstract

According to the negative pressure sputum suction equipment for patient lung nursing, the blocking piece is installed in the sputum storage cavity in a sliding mode, the blocking piece is provided with a sealing groove and a communicating opening, the sealing groove is sealed with the sealing piece in an attached mode, the sealing piece is fixed to the inner wall of the sputum storage cavity, and the sealing piece is attached to the blocking piece to seal the sputum storage cavity; a moving assembly for controlling the blocking piece to move is arranged on one side of the blocking piece, the blocking piece is not attached to the sealing piece any more after moving, at the moment, air is exhausted from the communicating opening, the catheter can move along with the blocking piece to be contained in the sputum storage cavity, and at the moment, a patient can freely cough. Cough sputum can be sucked into the sputum storage cavity on the left side of the separation blade by the exhaust air at the communicating port, and meanwhile, the patient can expectorate through the negative pressure at the communicating port.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The invention relates to the field of medical equipment, in particular to a negative pressure sputum suction device used for lung care of patients. Background Art

[0002] During the season change, various respiratory diseases occur frequently, and a large amount of sputum will accumulate in the patient's lungs. The accumulation of sputum in the lungs will not only make the patient feel very uncomfortable, but also easily lead to suffocation, aspiration pneumonia, atelectasis and other conditions. For this reason, the emergence of various sputum suction equipment is crucial for the care of the patient's lungs. Most of the existing sputum suction equipment is negative pressure type, which is inserted into the lungs through a catheter. After a period of negative pressure suction, all the sputum in the lungs can be sucked out.

[0003] However, in the use of existing negative pressure suction equipment, it is often necessary to insert a catheter into the patient's lungs for suction, which usually lasts for 15s-20s. During the suction process, the insertion of foreign matter can easily cause the patient to have the urge to cough, because coughing is a mechanism of nerve emission and is difficult to curb, which can easily cause discomfort to the patient or even dangerous situations. It is also difficult for medical staff or patients to pull out the catheter in time, resulting in a poor user experience. Even after pulling it out, the catheter must be rearranged, which is very troublesome. Summary of the invention

[0004] The purpose of the present invention is to provide a negative pressure sputum suction device for patient lung care to solve the above problems.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a negative pressure sputum suction device for patient lung care, comprising a vacuum pump, a suction port is arranged on the vacuum pump, one end of a suction pipe is sleeved on the suction port, the other end of the suction pipe is sleeved on the connecting port, the connecting port is fixedly connected to a sputum storage cavity in a sputum storage tube, a receiving head is installed on one side of the sputum storage cavity, a baffle is installed in the sputum storage cavity, a vent is arranged on the baffle, the vent passes through the baffle and connects the sputum storage cavity on both sides of the baffle, and a catheter is fixedly connected on one side of the vent;

[0006] The baffle is slidably installed in the sputum storage cavity, and a sealing groove and a connecting port are provided on the baffle. A sealing plate is sealed in the sealing groove, and the sealing plate is fixed to the inner wall of the sputum storage cavity. The sealing plate and the baffle are in contact with each other to achieve sealing of the sputum storage cavity. A moving component for controlling the movement of the baffle is provided on one side of the baffle, and the baffle is no longer in contact with the sealing plate after it moves. At this time, air is extracted from the connecting port, and the catheter will move with the baffle and be stored in the sputum storage cavity.

[0007] Preferably, the sputum storage tube is threadedly mounted on a fixed tube, and the fixed tube is fixed to the vacuum pump.

[0008] Preferably, the moving component includes an iron sheet fixed on one side of the baffle and a No. 1 spring seat, a No. 1 spring is sleeved on the No. 1 spring seat, the other end of the No. 1 spring is sleeved on the No. 2 spring seat, the No. 2 spring seat is fixed in the fixed tube, and a micro electromagnet is embedded in the fixed tube.

[0009] Preferably, a control component is arranged on the outside of the sputum storage tube, the control component includes a power supply fixed on the vacuum pump, the power supply is electrically connected to the micro electromagnet through a No. 1 wire, two storage blocks are symmetrically arranged on both sides of the sputum storage tube, each of the storage blocks has a storage slot, a bite block is slidably installed in the storage slot, the bite block and the storage block are fixed by a No. 2 spring, the two storage blocks are fixed by at least one fixing rod, at least one guide bar is fixed on one side of the storage block, the guide bar is slidably connected to a guide seat, the guide seat is fixed to the vacuum pump, a No. 1 conductive sheet is fixed in one of the storage slots, a No. 2 conductive sheet is fixed on the bite block corresponding to the storage slot, the No. 2 conductive sheet is electrically connected to the power supply through a No. 2 wire, and the No. 1 conductive sheet is electrically connected to the micro electromagnet through a No. 3 wire.

[0010] Preferably, friction strips are fixed on the outer sides of the bite blocks.

[0011] Preferably, a ventilation nozzle is fixedly connected to the outside of the vent, and the catheter is inserted into the ventilation nozzle.

[0012] Preferably, guide rails are symmetrically fixed on both sides of the sputum storage chamber, guide grooves that slide with the guide rails are symmetrically provided on the baffle, and a limit block is fixed on one side of the two guide rails. The shape of the guide rails and the guide grooves are matched so that the baffle can be removed from the two guide rails.

[0013] Preferably, the receiving head is made of silicone.

[0014] In summary, the present invention has the following beneficial effects:

[0015] 1. In the present application, a baffle is slidably installed in the sputum storage cavity, and a sealing groove and a connecting port are provided on the baffle. A sealing plate is sealed in the sealing groove, and the sealing plate is fixed to the inner wall of the sputum storage cavity. The sealing plate and the baffle are fitted to achieve sealing of the sputum storage cavity. When the sealing plate and the baffle are fitted, air can only be drawn from the vent. At this time, sputum suction can be performed through a catheter. A moving component for controlling the movement of the baffle is provided on one side of the baffle. After the baffle moves, it is no longer fitted with the sealing plate. At this time, air is drawn from the connecting port, and the catheter will move with the baffle and be stored in the sputum storage cavity. At this time, the patient can cough freely, and the sputum coughed up will be sucked into the sputum storage cavity on the left side of the baffle by the air drawn at the connecting port. At the same time, the negative pressure at the connecting port also helps the patient to cough up sputum.

[0016] 2. The sputum storage tube is threadedly installed on the fixed tube, and the fixed tube is fixed to the vacuum pump. The sputum storage tube can be removed from the fixed tube to facilitate the subsequent cleaning and collection of sputum in the sputum storage tube.

[0017] 3. The moving component includes an iron sheet fixed on one side of the baffle and a No. 1 spring seat, a No. 1 spring is sleeved on the No. 1 spring seat, and the other end of the No. 1 spring is sleeved on the No. 2 spring seat, and the No. 2 spring seat is fixed in the fixed tube, and a micro electromagnet is embedded in the fixed tube. When the micro electromagnet is energized, it will attract the iron sheet, and the iron sheet will move, and the baffle will move with the iron sheet, and the No. 1 spring will be compressed, and the baffle will be separated from the sealing sheet after moving; a control component is designed on the outside of the sputum storage tube to control the power on and off of the micro electromagnet, and the control component includes a power supply fixed on the vacuum pump, and the power supply is electrically connected to the micro electromagnet through a No. 1 wire, and two storage blocks are symmetrically arranged on both sides of the sputum storage tube, and a storage groove is provided in the storage block, and a bite block is slidably installed in the storage groove, and the bite block and the storage block are fixed by the No. 2 spring, and the two storage blocks are fixed by at least one fixing rod, and one side of the storage block is fixed to One less guide bar is provided, the guide bar is slidably connected to the guide seat, the guide seat is fixed to the vacuum pump, a No. 1 conductive sheet is fixed in one of the storage slots, a No. 2 conductive sheet is fixed on the bite block corresponding to the storage slot, the No. 2 conductive sheet is electrically connected to the power supply through the No. 2 wire, and the No. 1 conductive sheet is electrically connected to the micro electromagnet through the No. 3 wire. When in use, the user opens his mouth, the sputum storage tube is inserted into the user's mouth, the user's upper teeth press the upper bite block, and the lower teeth bite the lower bite block. When the user wants to cough, the upper and lower teeth close, driving the two bite blocks to retract inward, so that the No. 2 conductive sheet fits with the No. 1 conductive sheet for conductivity, the power supply, the No. 1 wire, the micro electromagnet, the No. 3 wire, the No. 1 conductive sheet, the No. 2 conductive sheet and the No. 2 wire form a closed circuit, so that the micro electromagnet is energized, so that the patient can operate in time, and the user experience is very good.

[0018] 4. The guide rails are symmetrically fixed on both sides of the sputum storage cavity, and guide grooves that slide with the guide rails are symmetrically opened on the baffle. A limit block is fixed on one side of the two guide rails. The shape of the guide rails and the guide grooves is matched so that the baffle can be removed from the two guide rails. After the sputum storage tube is unscrewed from the fixed tube, the baffle can be taken out of the sputum storage tube for cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 is a first schematic diagram of the appearance of an embodiment of the present invention;

[0021] Figure 2 A schematic cross-sectional view of an embodiment of the present invention;

[0022] Figure 3 yes Figure 2 The enlarged schematic diagram at A in the middle;

[0023] Figure 4 yes Figure 2 The enlarged schematic diagram of point B in the middle;

[0024] Figure 5 is a schematic diagram of the structure of an embodiment of the present invention after the sputum storage tube is removed;

[0025] Figure 6 yes Figure 5 The enlarged schematic diagram at C in the middle;

[0026] Figure 7 It is a simple circuit display diagram of the present invention.

[0027] In the figure: 10, vacuum pump; 11, air extraction port; 12, air extraction pipe; 13, guide seat; 14, guide strip; 15, bite block; 16, storage block; 18, sputum storage tube; 19, receiving head; 20, catheter; 21, No. 3 wire; 22, fixing tube; 23, storage slot; 25, sputum storage chamber; 26, No. 1 spring; 27, connection port; 28, No. 2 spring seat; 29, micro electromagnet; 30, power supply ; 31. Wire No. 1; 32. Wire No. 2; 33. Limit block; 34. Guide rail; 35. Sealing plate; 36. Sealing groove; 37. Connecting port; 38. Spring seat No. 1; 39. Iron sheet; 40. Baffle; 41. Vent; 42. Vent nozzle; 43. Friction strip; 44. Spring No. 2; 45. Conductive sheet No. 1; 46. Conductive sheet No. 2; 47. Fixing rod; 48. Guide groove; 60. Control assembly. DETAILED DESCRIPTION

[0028] Combined with Figure 1-Figure 7 The negative pressure sputum suction device for patient lung care comprises a vacuum pump 10, on which a suction port 11 is arranged. After the vacuum pump 10 is started, negative pressure is generated to suck air from the suction port 11. One end of a suction pipe 12 is sleeved on the suction port 11, and the other end of the suction pipe 12 is sleeved on a connecting port 27. The connecting port 27 is fixedly connected to a sputum storage cavity 25 in a sputum storage tube 18. A receiving head 19 is installed on one side of the sputum storage cavity 25. A baffle 40 is installed in the sputum storage cavity 25, and a vent is provided on the baffle 40. 41, the vent 41 penetrates the baffle 40 and communicates with the sputum storage chambers 25 on both sides of the baffle 40, a catheter 20 is fixedly connected to one side of the vent 41, the air is finally sucked from the catheter 20 through the air suction pipe 12, the connecting port 27, the sputum storage chamber 25 at the air suction port 11, and the catheter 20 is manually inserted into the patient's lungs to achieve the function of suctioning sputum, and the sucked sputum will pass through the catheter 20 and the vent 41 and finally be collected in the sputum storage chamber 25 on the right side of the baffle 40;

[0029] During the suction process, the patient is likely to want to cough. To this end, the applicant has made improvements, specifically:

[0030] The baffle 40 is slidably installed in the sputum storage cavity 25. The baffle 40 is provided with a sealing groove 36 and a connecting port 37. The sealing groove 36 is sealed with a sealing sheet 35, and the sealing sheet 35 is fixed to the inner wall of the sputum storage cavity 25. The sealing sheet 35 and the baffle 40 are in contact with each other to achieve sealing of the sputum storage cavity 25. When the sealing sheet 35 and the baffle 40 are in contact with each other, air can only be extracted from the vent 41. A moving component for controlling the movement of the baffle 40 is provided on one side of the baffle 40. After the baffle 40 moves, it is no longer in contact with the sealing sheet 35. At this time, air is extracted from the connecting port 37, and the catheter 20 will move with the baffle 40 and be stored in the sputum storage cavity 25. At this time, the patient can cough freely, and the sputum coughed out will be sucked into the sputum storage cavity 25 on the left side of the baffle 40 by the air suction at the connecting port 37. At the same time, the negative pressure at the connecting port 37 also helps the patient to cough up sputum.

[0031] Particularly, the sputum storage tube 18 is threadedly mounted on a fixed tube 22 , and the fixed tube 22 is fixed to the vacuum pump 10 . The sputum storage tube 18 can be removed from the fixed tube 22 , so as to facilitate the subsequent cleaning and collection of sputum in the sputum storage tube 18 .

[0032] The moving component includes an iron sheet 39 and a No. 1 spring seat 38 fixed on one side of the baffle 40, a No. 1 spring 26 is sleeved on the No. 1 spring seat 38, and the other end of the No. 1 spring 26 is sleeved on the No. 2 spring seat 28, and the No. 2 spring seat 28 is fixed in the fixed tube 22. A micro electromagnet 29 is embedded in the fixed tube 22. When the micro electromagnet 29 is energized, it will attract the iron sheet 39, and the iron sheet 39 will move, and the baffle 40 will move with the iron sheet 39, the No. 1 spring 26 is compressed, and the baffle 40 will be separated from the sealing sheet 35 after moving.

[0033] In order to further optimize the user experience of the present application, the applicant has designed a control component 60 on the outside of the sputum storage tube 18 to control the on and off of the micro electromagnet 29. The control component 60 includes a power supply 30 fixed to the vacuum pump 10, and the power supply 30 is electrically connected to the micro electromagnet 29 through a No. 1 wire 31. Two storage blocks 16 are symmetrically arranged on both sides of the sputum storage tube 18, and a storage groove 23 is provided in each of the storage blocks 16. A bite block 15 is slidably installed in the storage groove 23. The bite block 15 is fixed to the storage block 16 by a No. 2 spring 44, and the two storage blocks 16 are fixed by at least one fixing rod 47. At least one guide bar 14 is fixed on one side of the storage block 16, and the guide bar 14 is slidably connected to the guide seat 13. The guide seat 13 is fixed to the vacuum pump 10, and a No. 1 conductive sheet 45 is fixed in one of the storage grooves 23. 3, a No. 2 conductive sheet 46 is fixed on the corresponding bite block 15, and the No. 2 conductive sheet 46 is electrically connected to the power supply 30 through the No. 2 wire 32, and the No. 1 conductive sheet 45 is electrically connected to the micro electromagnet 29 through the No. 3 wire 21. When in use, the user opens his mouth, the sputum storage tube 18 is inserted into the user's mouth, the user's upper teeth press the upper bite block 15, and the lower teeth bite the lower bite block 15. When the user wants to cough, the upper and lower teeth are closed, driving the two bite blocks 15 to retract inward, so that the No. 2 conductive sheet 46 and the No. 1 conductive sheet 45 are in contact with each other and conduct electricity. The power supply 30, the No. 1 wire 31, the micro electromagnet 29, the No. 3 wire 21, the No. 1 conductive sheet 45, the No. 2 conductive sheet 46 and the No. 2 wire 32 form a closed circuit, so that the micro electromagnet 29 is energized, so that the patient can operate in time, and the user experience is very good.

[0034] Furthermore, a friction strip 43 is fixed on the outer side of the bite block 15, and the friction strip 43 can optimize the patient's bite experience.

[0035] Furthermore, a vent nozzle 42 is fixedly connected to the outside of the vent port 41, and the conduit 20 is inserted into the vent nozzle 42. The conduit 20 can be removed from the vent nozzle 42 and replaced, so as to facilitate cleaning and maintain hygiene.

[0036] Furthermore, guide rails 34 are symmetrically fixed on both sides of the sputum storage cavity 25, guide grooves 48 symmetrically arranged on the baffle 40 for sliding cooperation with the guide rails 34, and a limit block 33 is fixed on one side of the two guide rails 34. The shape of the guide rails 34 and the guide grooves 48 cooperate so that the baffle 40 can be removed from the two guide rails 34. After the sputum storage tube 18 is unscrewed from the fixed tube 22, the baffle 40 can be removed from the sputum storage tube 18 for cleaning.

[0037] Furthermore, the receiving head 19 is made of silicone, which is easily deformable and convenient to put into the mouth.

[0038] Directions:

[0039] Insert the receiving head 19 together with the sputum storage tube 18 into the patient's mouth, wherein the receiving head 19 is aimed at the patient's throat, and the catheter 20 is inserted into the patient's lungs. The patient's upper and lower teeth respectively press the bite block 15, start the vacuum pump 10, and suck the sputum in the patient's lungs into the sputum storage cavity 25 on the right side of the baffle 40 through the suction port 11, the sputum storage cavity 25, the vent 41, and finally from the end of the catheter 20 into the sputum storage cavity 25 on the right side of the baffle 40;

[0040] If the patient wants to cough during the suction process, the patient can actively bite the two bite blocks 15, so that the two bite blocks 15 retract, and one of the bite blocks 15 drives the second conductive sheet 46 to fit the first conductive sheet 45, so that the power supply 30, the first wire 31, the micro electromagnet 29, the third wire 21, the first conductive sheet 45, the second conductive sheet 46 and the second wire 32 form a closed circuit, so that the micro electromagnet 29 is energized and the micro electromagnet When the magnet 29 is energized, a magnetic force is generated to attract the iron sheet 39, and the baffle 40 moves with the iron sheet 39. The baffle 40 moves away from the sealing sheet 35, and the connecting port 37 connects the sputum storage chambers 25 on both sides. After the baffle 40 moves, the catheter 20 is pulled into the sputum storage chamber 25. The patient can cough freely without being disturbed by the catheter 20. At this time, sputum suction is still performed, but the sputum is sucked from the connecting port 37. The negative pressure at the connecting port 37 helps the patient cough up sputum.

[0041] After coughing, the patient releases the two bite blocks 15, the No. 2 spring 44 is reset, driving the two bite blocks 15 to reset, the micro electromagnet 29 is powered off, the No. 1 spring 26 is reset, driving the baffle 40 to reset, and the catheter 20 is reinserted into the patient's lungs to suction sputum, and the baffle 40 is reset to fit tightly with the sealing sheet 35.

[0042] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology in this field to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A negative pressure sputum suction device for patient lung care, comprising a vacuum pump (10), wherein the vacuum pump (10) is provided with an air suction port (11), wherein one end of an air suction pipe (12) is sleeved on the air suction port (11), and the other end of the air suction pipe (12) is sleeved on a connecting port (27), wherein: The connecting port (27) is fixedly connected to the sputum storage cavity (25) in the sputum storage tube (18); a receiving head (19) is installed on one side of the sputum storage cavity (25); a baffle (40) is installed in the sputum storage cavity (25); a vent (41) is provided on the baffle (40); the vent (41) passes through the baffle (40) and is connected to the sputum storage cavity (25) on both sides of the baffle (40); and a catheter (20) is fixedly connected to one side of the vent (41); The baffle (40) is slidably installed in the sputum storage chamber (25). A sealing groove (36) and a connecting port (37) are provided on the baffle (40). A sealing plate (35) is sealed in the sealing groove (36). The sealing plate (35) is fixed to the inner wall of the sputum storage chamber (25). The sealing plate (35) and the baffle (40) are in contact with each other to achieve sealing of the sputum storage chamber (25). A moving component for controlling the movement of the baffle (40) is provided on one side of the baffle (40). After the baffle (40) moves, it is no longer in contact with the sealing plate (35). At this time, air is extracted from the connecting port (37), and the catheter (20) moves together with the baffle (40) and is stored in the sputum storage chamber (25).

2. A negative pressure sputum suction device for patient lung care according to claim 1, characterized in that: The sputum storage tube (18) is threadably mounted on a fixed tube (22), and the fixed tube (22) is fixed to the vacuum pump (10).

3. A negative pressure sputum suction device for patient lung care according to claim 1, characterized in that: The moving assembly comprises an iron sheet (39) fixed on one side of the baffle (40) and a No. 1 spring seat (38); a No. 1 spring (26) is sleeved on the No. 1 spring seat (38); the other end of the No. 1 spring (26) is sleeved on the No. 2 spring seat (28); the No. 2 spring seat (28) is fixed in the fixed tube (22); and a micro electromagnet (29) is embedded in the fixed tube (22).

4. A negative pressure sputum suction device for patient lung care according to claim 3, characterized in that: A control component (60) is arranged outside the sputum storage tube (18), and the control component (60) includes a power supply (30) fixed on the vacuum pump (10), and the power supply (30) is electrically connected to the micro electromagnet (29) via a No. 1 wire (31). Two storage blocks (16) are symmetrically arranged on both sides of the sputum storage tube (18), and a storage groove (23) is provided in each of the storage blocks (16). A bite block (15) is slidably installed in the storage groove (23), and the bite block (15) is fixed to the storage block (16) via a No. 2 spring (44), and the two storage blocks (16) are fixed via at least one fixing The rod (47) is fixed, at least one guide strip (14) is fixed on one side of the storage block (16), the guide strip (14) is slidably connected to the guide seat (13), the guide seat (13) is fixed to the vacuum pump (10), a No. 1 conductive sheet (45) is fixed in one of the storage slots (23), a No. 2 conductive sheet (46) is fixed on the bite block (15) corresponding to the storage slot (23), the No. 2 conductive sheet (46) is electrically connected to the power supply (30) through a No. 2 wire (32), and the No. 1 conductive sheet (45) is electrically connected to the micro electromagnet (29) through a No. 3 wire (21).

5. A negative pressure sputum suction device for patient lung care according to claim 1, characterized in that: A friction strip (43) is fixed on the outside of the bite block (15).

6. A negative pressure sputum suction device for patient lung care according to claim 1, characterized in that: A ventilation nozzle (42) is fixedly connected to the outside of the ventilation port (41), and the conduit (20) is inserted into the ventilation nozzle (42).

7. A negative pressure sputum suction device for patient lung care according to claim 1, characterized in that: Guide rails (34) are symmetrically fixed on both sides of the sputum storage chamber (25); guide grooves (48) symmetrically arranged on the baffle (40) are slidably matched with the guide rails (34); a limit block (33) is fixed on one side of the two guide rails (34); the shapes of the guide rails (34) and the guide grooves (48) are matched so that the baffle (40) can be removed from the two guide rails (34).

8. The negative pressure sputum suction device for patient lung care according to claim 1, characterized in that: The receiving head (19) is made of silicone.