Closed sputum suction catheter

Abstract

Disclosed in the present invention is a closed sputum suction catheter, comprising a joint assembly and a sputum suction hose. The joint assembly comprises a flushing cavity, a respiratory cavity and a sputum collecting cavity, wherein the respiratory cavity is provided with a ventilator joint configured to connect to a ventilator tube; the sputum collecting cavity is provided with a tube joint configured to connect to a tracheal tube; and the flushing cavity is provided with a first flushing tube. The sputum suction hose can run through the flushing cavity, the respiratory cavity and the sputum collecting cavity to enter the respiratory tract of a patient to suck out sputum. The sputum collecting cavity is further provided with a second flushing tube and a drainage tube. By means of the present invention, sputum coughed up by a patient can be collected, and the outer wall of the sputum suction hose can be easily cleaned, thereby improving the efficiency and safety of treatment.

Description

A closed suction tube Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a closed sputum suction tube. Background Art

[0002] Clinically, patients experiencing respiratory distress due to difficulty expectoration or coughing require manual suctioning to clear respiratory secretions and maintain airway patency. Nurses can utilize the negative pressure suction effect to remove sputum and aspirated material from the trachea through a suction tube. A closed suction tube can be connected to a ventilator and endotracheal tube, allowing the patient to maintain the necessary positive airway pressure and therapeutic oxygen concentration while the suctioning process is in progress.

[0003] While intubated, patients may experience choking and coughing, and coughed-up sputum may enter the breathing tube connected to the intubation tube or adhere to the inner wall of the breathing tube. Medical staff need to suction the sputum promptly, otherwise the sputum backflow may cause airway obstruction, resulting in hypoxia or suffocation. The duration of a patient's choking is uncertain. In order to promptly detect and address choking, nursing staff need to be by the patient's side to monitor the patient's condition at all times, which increases the workload of nursing staff and exacerbates the shortage of medical care resources.

[0004] In addition, the closed suction tube currently used in clinical practice can be retracted after suctioning and flushed by injecting flushing fluid. However, during use, some sputum will adhere to the outer wall of the suction tube, making it difficult to clean. The residual sputum on the outer wall of the suction tube is also prone to sticking to the protective cover of the suction tube, forming sputum scabs, causing bacterial growth, reducing medical safety, and shortening the service life of the suction tube.

[0005] Therefore, an object of the present invention is to provide a closed sputum suction tube that can at least partially solve the above-mentioned problems. Summary of the Invention

[0006] The technical problem to be solved by the embodiments of the present invention is to provide a closed sputum suction tube that can collect sputum coughed up temporarily by patients and is easy to clean the sputum suction hose.

[0007] In order to solve the above technical problems, an embodiment of the present invention provides a closed sputum suction tube, including a joint assembly and a sputum suction hose, wherein the joint assembly includes a flushing cavity, a breathing cavity and a sputum collecting cavity.

[0008] The breathing cavity is provided with a ventilator connector for connecting to a ventilator pipeline, the sputum collecting cavity is provided with a cannula connector for connecting to an endotracheal cannula, and the flushing cavity is provided with a first flushing tube;

[0009] The sputum suction hose can pass through the flushing cavity, the breathing cavity and the sputum collecting cavity, and enter the patient's respiratory tract to suck sputum;

[0010] The sputum collecting cavity is also provided with a second flushing tube and a drainage tube.

[0011] As an improvement to the above solution, an isolation valve is provided between the flushing cavity and the breathing cavity.

[0012] As an improvement to the above scheme, the two ends of the suction hose are respectively a suction end and a negative pressure access end, the suction end is used for suctioning sputum, and the negative pressure access end is used to connect a negative pressure pipeline; the negative pressure access end is provided with a control valve for controlling the opening and closing of the negative pressure pipeline.

[0013] As an improvement to the above solution, one end of the drainage tube is connected to the sputum collecting cavity, and the other end is connected to the sputum suction hose;

[0014] The connection point between the drainage tube and the sputum suction hose is located between the control valve and the sputum suction end.

[0015] As an improvement to the above solution, the outer side of the sputum suction hose is covered with a transparent protective cover;

[0016] The sputum suction hose is provided with a limit mark or a length mark for indicating the insertion depth;

[0017] The breathing cavity is also provided with a drug delivery tube for delivering drugs to the patient's respiratory tract;

[0018] The drainage tube is provided with a valve or a tube clamp.

[0019] As an improvement to the above solution, a guide tube corresponding to the intubation joint is provided at the connection point between the breathing cavity and the sputum collecting cavity, and the diameter of the guide tube gradually decreases along the direction in which the sputum suction hose is inserted into the intubation joint.

[0020] As an improvement of the above solution, a flushing baffle corresponding to the second flushing tube is provided in the sputum collecting cavity to prevent the flushing liquid injected from the second flushing tube from entering the intubation connector.

[0021] As an improvement of the above solution, the flushing baffle is V-shaped or arc-shaped, and is used to guide the flushing liquid to the inner wall of the sputum collecting cavity.

[0022] As an improvement to the above solution, a retaining ring is provided at the connection point between the sputum collecting cavity and the cannula connector to prevent the cleaning liquid injected from the second flushing tube from flowing into the cannula connector along the inner wall of the sputum collecting cavity.

[0023] As an improvement to the above solution, a diversion cavity is provided in the sputum collecting cavity, and the diversion cavity is connected to the second flushing tube;

[0024] In the radial direction of the sputum collecting cavity, a plurality of flushing holes are opened on both sides of the diversion cavity for flushing the inner wall of the sputum collecting cavity and the sputum suction hose.

[0025] As an improvement to the above solution, the cannula connector includes a connector body and a plug connector, one end of the plug connector is provided with a sputum collection port for communicating with the sputum collection cavity, and the other end is provided with a plug tube for communicating with the connector body, and the connector body is provided with an access tube for inserting the plug tube;

[0026] The side wall of the insertion tube is provided with a locking block, and the inner side wall of the access tube is provided with a locking channel, the locking channel includes an insertion channel for inserting the locking block and a rotation channel for circumferential movement of the locking block, and the locking block enters the rotation channel along the insertion channel;

[0027] The locking block is provided with a buckle portion, and a feedback portion for hindering the movement of the buckle portion is provided at a preset position of the rotation channel, so that the movement of the locking block is hindered by the combination or contact between the buckle portion and the feedback portion.

[0028] As an improvement to the above solution, the top surface of the buckle portion is an arc-shaped concave surface, and the feedback portion is a convex portion adapted to the arc-shaped concave surface;

[0029] Guide slopes are provided on both sides of the feedback portion, and the buckle portion is provided with inclined surfaces corresponding to the guide slopes.

[0030] As an improvement to the above solution, an outer side wall of the access tube is provided with an observation port corresponding to the rotation channel to expose the rotation channel.

[0031] As an improvement to the above solution, the connector body is provided with a main port and a communication channel, the main port is communicated with the access tube through the communication channel, and the diameter of the communication channel gradually decreases from the access tube to the main port.

[0032] As an improvement to the above solution, the connector body is further provided with an auxiliary tube communicating with the main port, and the auxiliary tube is arranged obliquely relative to the access tube.

[0033] As an improvement to the above solution, a sealing member is provided in the flushing cavity, and the sealing member is provided with a catheter hole adapted to the sputum suction hose;

[0034] The sputum suction hose includes a main section for connecting to a negative pressure pipeline, a sputum suction section for suctioning sputum, and an identification feedback section. The main section, identification feedback section, and sputum suction section are connected in sequence to form a main airway for connecting to the negative pressure pipeline.

[0035] The sputum suction section is provided with a side suction hole connected to the main airway, and the side wall of the identification feedback section is provided with a concave tactile feedback groove, so that when the tactile feedback groove passes through the catheter hole, it contacts the sealing member to form tactile feedback.

[0036] As an improvement to the above solution, the side wall of the identification feedback section is provided with a display area for reminding the user of the position, the display area is provided with an identification pattern of preset color and shape, and the display area is located between the tactile feedback groove and the main tube section.

[0037] As an improvement to the above solution, the end of the sputum suction section is provided with a main suction hole for suctioning sputum, and the side suction hole is provided on the side wall of the sputum suction section;

[0038] There are at least two side suction holes; along the axial direction of the main airway, a preset spacing is left between adjacent side suction holes so that the side suction holes are staggered.

[0039] As an improvement of the above solution, the tactile feedback groove is an annular groove, and the transition between the inner side wall of the annular groove and the outer side wall of the identification feedback section is a smooth surface.

[0040] The implementation of the present invention has the following beneficial effects:

[0041] The embodiment of the present invention discloses a closed sputum suction tube, comprising a joint assembly and a sputum suction hose, wherein the joint assembly comprises a flushing cavity, a breathing cavity and a sputum collecting cavity.

[0042] The setting of the sputum collecting cavity can effectively collect a small amount of sputum coughed up by the patient, thereby reducing the risk of choking and coughing of the patient when temporarily unattended, and the risk of the coughed-up sputum flowing back and blocking the endotracheal tube.

[0043] Moreover, the flushing cavity and the sputum collecting cavity are respectively connected to the first flushing tube and the second flushing tube to thoroughly clean the sputum suction hose.

[0044] The sputum collecting cavity is provided with a drainage tube for extracting sputum to discharge the accumulated fluid in the sputum collecting cavity. At the same time, the setting of the second flushing tube can also clean the sputum collecting cavity to reduce the growth of bacteria, thereby improving the safety of treatment and extending the service life of the sputum suction tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] FIG1 is a schematic diagram of the three-dimensional structure of a first embodiment of a closed sputum suction tube according to the present invention;

[0046] FIG2 is a schematic cross-sectional view of a connector assembly of a first embodiment of a closed sputum suction tube according to the present invention;

[0047] FIG3 is a schematic cross-sectional view of a connector assembly of a second embodiment of a closed sputum suction tube according to the present invention;

[0048] FIG4 is a schematic cross-sectional view of a connector assembly of a third embodiment of a closed sputum suction tube according to the present invention;

[0049] FIG5 is a schematic structural diagram of the cannula connector of the present invention;

[0050] FIG6 is a schematic diagram of the structure of the intubation joint of the present invention;

[0051] FIG7 is a schematic cross-sectional view of the intubation connector of the present invention;

[0052] FIG8 is a schematic diagram of the structure of another embodiment of the cannula connector of the present invention;

[0053] FIG9 is a schematic structural diagram of the flushing cavity of the present invention;

[0054] FIG10 is a schematic structural diagram of the sputum suction hose of the present invention;

[0055] FIG11 is a schematic cross-sectional view of the sputum suction hose of the present invention. DETAILED DESCRIPTION

[0056] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0057] Referring to Figures 1 and 2, a first embodiment of the present invention provides a closed sputum suction tube, comprising a connector assembly 1 and a sputum suction hose 2. The connector assembly 1 comprises a flushing cavity 11, a breathing cavity 12, and a sputum collection cavity 13 for temporarily collecting expectorated sputum. The sputum suction hose 2 sequentially passes through the flushing cavity 11, the breathing cavity 12, and the sputum collection cavity 13, and then enters the patient's respiratory tract through an endotracheal tube to aspirate sputum.

[0058] The flushing cavity 11 and the sputum collecting cavity 13 are respectively connected to a first flushing tube 111 and a second flushing tube 131 for cleaning. The sputum collecting cavity 13 is provided with a drainage tube 132 for discharging the accumulated fluid in the sputum collecting cavity 13 .

[0059] The breathing chamber 12 is provided with a ventilator connector 122 for connecting to a ventilator circuit, and the sputum collection chamber 13 is provided with a cannula connector 4 for connecting to an endotracheal tube. The first flushing tube 111 is used to inject cleaning fluid to clean the inner wall of the sputum suction hose 2. The second flushing tube 131 is used to inject cleaning fluid to flush the sputum collection chamber 13. Preferably, the second flushing tube 131 is also used to inject cleaning fluid to flush the outer wall of the sputum suction hose 2. The first flushing tube 111 and the second flushing tube 131 may be provided with protective caps and / or one-way valves.

[0060] Specifically, an isolation valve 5 is provided between the flushing cavity 11 and the breathing cavity 12 to control the communication between the flushing cavity 11 and the breathing cavity 12. That is, the isolation valve 5 can be used to open or close the passage between the flushing cavity 11 and the breathing cavity 12. When the isolation valve 5 is in an open state, the suction hose 2 can extend into and pass through the breathing cavity 12. When the isolation valve 5 is in a closed state, the flushing cavity 11 and the breathing cavity 12 are not connected. The cleaning liquid is injected through the first flushing pipe 111, and the cleaning liquid is sucked by negative pressure at the same time, so that the inner wall of the suction hose can be cleaned. Specifically, the isolation valve 5 can be a stopcock, and the stopcock is provided with a hose through hole for the suction hose 2 to pass through.

[0061] The outer side of the sputum suction hose 2 is covered with a transparent protective cover 7 for isolating the sputum suction hose 2 from the external environment. Specifically, one end of the transparent protective cover 7 is fixedly and sealedly connected to the flushing cavity 11, and the other end is sealedly connected to the outer wall of the sputum suction hose 2.

[0062] In order to facilitate the operation of medical staff, the suction hose 2 is provided with a limit mark and / or a length mark for indicating the insertion depth, so that the insertion depth of the suction hose 2 can be judged through the transparent protective cover 7. The limit mark and length mark can be realized by drawing, engraving or integrally injection-molded with the suction hose.

[0063] In addition, the breathing cavity 12 is further provided with a drug delivery tube 121 for delivering drugs to the patient's respiratory tract. For example, aerosolized drug delivery can be performed to the patient through the drug delivery tube 121. Preferably, the drug delivery tube 121 is provided with a sealing protective cap.

[0064] The suction hose 2 has a suction end and a negative pressure access end. The suction end is used to insert into the patient's intubation tube for suctioning, while the negative pressure access end is connected to the negative pressure pipeline. The negative pressure access end is equipped with a control valve 24 for controlling the opening and closing of the negative pressure pipeline. Therefore, the suction hose 2 can be connected to the negative pressure pipeline through the control valve 24, thereby aspirating sputum from the suction end. For example, the control valve 24 can be a conventional press valve, which adjusts the negative pressure airflow by the degree of pressure.

[0065] To facilitate suctioning of the drainage tube 132, one end of the drainage tube 132 is connected to the sputum collecting cavity 13, and the other end is connected to the negative pressure access end of the sputum suction hose 2; the connection point between the drainage tube 132 and the sputum suction hose 2 is located between the control valve 24 and the sputum suction end. That is, when the control valve 23 is opened, both the drainage tube 132 and the sputum suction end can be in a suction state, thereby facilitating the discharge of liquid from the sputum collecting cavity 13. Preferably, the drainage tube 132 is provided with a valve or tube clamp 1321 for medical personnel to close the drainage tube 132, thereby stopping the suctioning operation of the drainage tube 132.

[0066] The intubation joint is shown in Figure 2. In order to facilitate the user to insert the suction hose 2 into the intubation joint 4, a guide tube 14 corresponding to the intubation joint 4 is provided at the connection between the breathing cavity 12 and the sputum collecting cavity 13. Along the direction of inserting the suction hose 2 into the intubation joint 4, the diameter of the guide tube 14 gradually decreases. The suction hose 2 is aligned with the intubation joint 4 through the guide tube 14, so that it is easy to insert into the intubation joint 4.

[0067] In order to prevent the flushing liquid from flowing into the cannula connector 4, a retaining ring 15 is provided at the connection point between the sputum collecting cavity 13 and the cannula connector 4, to prevent the flushing liquid injected from the second flushing tube 131 from flowing down the inner wall of the sputum collecting cavity 13 and entering the cannula connector 4. Preferably, the retaining ring 15 is trumpet-shaped.

[0068] The closed sputum suction tube of Example 1 can effectively collect sputum coughed up by the patient, prevent sputum from flowing back into the endotracheal tube, reduce the workload of nursing staff, and improve treatment efficiency; at the same time, the inside and outside of the sputum suction tube can be cleaned after suctioning sputum, reducing bacterial growth, improving treatment safety, and extending the service life of the sputum suction tube.

[0069] 5 to 7 , in order to facilitate the connection of the endotracheal tube, the intubation connector 4 includes a connector body 41 and a plug connector 42. One end of the plug connector 42 is provided with a sputum collection port 421 for communicating with the sputum collection cavity 13, and the other end is provided with a plug tube 422 for communicating with the connector body 41. The connector body 41 is provided with an access tube 411 for inserting the plug tube 422.

[0070] Therefore, the connector body 41 can be used to stably connect with a tracheal tube that is required to be fixed frequently, and when relatively frequent replacement is required, the insertion tube 422 can be inserted into the access tube 411 to achieve rapid docking.

[0071] In which, the side wall of the plug-in tube 422 is provided with a locking block 4221, and the inner side wall of the access tube 411 is provided with a locking channel, and the locking channel includes an insertion channel 4111 for inserting the locking block 4221 and a rotation channel 4112 for circumferential movement of the locking block 4221, and the locking block 4221 enters the rotation channel 4112 along the insertion channel 4111; therefore, when the plug-in tube 422 is inserted into the access tube 411 along the insertion channel 4111 through the locking block 4221, the locking block 4221 can be completely separated from the insertion channel 4111 and enter the rotation channel 4112 by screwing the plug-in tube 422, thereby ensuring that the plug-in tube is difficult to axially separate from the access tube 411.

[0072] The locking block 4221 is provided with a snap portion, and a feedback portion for hindering the movement of the snap portion is provided at a preset position of the rotating channel 4112, so that the movement of the locking block 4221 is hindered through the combination or contact between the snap portion and the feedback portion, thereby preventing the locking block 4221 from accidentally returning to the insertion channel 4111 and loosening. At the same time, there is a certain resistance in the combination or contact between the snap portion and the feedback portion, so that the user can be well fed back through tactile feedback that the locking block 4221 is rotated to the preset firmly locked position.

[0073] The top surface of the buckle portion is a curved concave surface 422a, and the feedback portion is a raised portion 411a that matches this curved concave surface 422a. Therefore, when the raised portion 411a rotates to the feedback portion, it collides with the feedback portion, providing the operator with noticeable resistance feedback. Accordingly, the operator can increase the rotational force, causing the raised portion 411a to snap into the curved concave surface 422a through slight deformation between the buckle portion and the feedback portion, thereby completing the connection and locking between the insertion tube 422 and the access tube 411. This provides noticeable tactile feedback of the resistance change, as well as audible feedback.

[0074] Regarding the embodiments of the snap-on portion and feedback portion, another embodiment is provided, as shown in FIG8 . The feedback portion is provided with guide bevels 411b on either side, and the top of the snap-on portion is provided with an inclined surface 422b corresponding to the guide bevels 411b. Therefore, when the inclined surface 422b rotates toward the feedback portion, the top surface of the snap-on portion moves along the guide bevels 411b. As the inclined surface 422b moves along one guide bevel 411b, the compressive force between the top of the snap-on portion and the guide bevel 411b increases, creating a noticeable sense of resistance. Correspondingly, when the snap-on portion passes over the feedback portion and reaches the other guide bevel 411b, the compressive force between the top of the snap-on portion and the guide bevel 411b gradually decreases. This achieves a locked connection between the insertion tube 422 and the access tube 411, providing a noticeable tactile feedback of the resistance change.

[0075] Furthermore, to provide an additional way for the operator to confirm that the plug-in tube 422 and the access tube 411 are locked, the outer wall of the access tube 411 is provided with an observation port 4113 corresponding to the rotation channel 4112, thereby exposing the rotation channel 4112. The operator can observe the position between the locking portion and the feedback portion through the observation port 4113, thereby determining whether the plug-in tube 422 and the access tube 411 are locked.

[0076] To improve the seal between the insertion tube 422 and the access tube 411 after insertion, the connector body 41 is provided with a main port 412 and a communication channel 413. The main port 412 communicates with the access tube 411 through the communication channel 413. The diameter of the communication channel 413 gradually decreases from the access tube 411 to the main port 412. Therefore, the insertion tube 422 and the access tube 411 can be sealed by insertion and interlocking.

[0077] On the other hand, in order to improve the functionality of the connector body 41 , the connector body 41 is further provided with an auxiliary tube 414 communicating with the main port 412 . The auxiliary tube 414 is arranged obliquely relative to the access tube 411 .

[0078] Moreover, the side wall of the plug connector 42 is further provided with a side tube 423 for an external pipeline, and the side tube 423 is connected to the plug tube 422 , so that a flushing pipe can be connected to the side tube 423 to clean the inside of the plug connector 42 and the connector body 41 .

[0079] 9 , a sealing member 6 is provided in the flushing cavity 11 , and the sealing member 6 is provided with a catheter hole 61 adapted to the sputum suction hose;

[0080] 10 and 11 , the suction hose 2 includes a main section 21 for connecting to a negative pressure line, a suction section 23 for suctioning sputum, and an identification feedback section 22. The main section 21, the identification feedback section 22, and the suction section 23 are sequentially connected to form a main airway 2a for communicating with the negative pressure line.

[0081] The suction section 23 is provided with a side suction hole 231 connected to the main airway 2a. A main suction hole 232 for suctioning sputum is provided at the end of the suction section 23. The side suction hole 231 is located on the side wall of the suction section 23. The side wall of the indicator feedback section 22 is provided with a concave tactile feedback groove 221. When the tactile feedback groove 221 passes through the catheter hole 61, it contacts the sealing member 6 to provide tactile feedback. Therefore, when the suction hose 2 completes the suction process, the portion extending into the patient cannot be excessively withdrawn during the withdrawal process. Therefore, the position of the tactile feedback groove 221 on the suction hose 2 can be preset. This design position of the tactile feedback groove 221 can be used to provide a user with an early warning to stop withdrawing the suction hose 2, thereby preventing the user from excessively withdrawing the suction hose 2 and causing contaminants to spread within the transparent protective cover 7 or other locations. The sealing member 6 is preferably a sealing ring.

[0082] The sidewall of the identification feedback section 22 is provided with a display area 222 for reminding the user of the position. The display area is provided with an identification pattern of a preset color and shape. The identification pattern can be a conspicuous color such as a black rectangle or a blue wave. Therefore, when the medical staff withdraws the suction section 23, they can first see the identification pattern, which reminds the operator to stop suctioning.

[0083] Preferably, the display area is located between the tactile feedback groove 221 and the main tube section 21. This arrangement can provide the operator with visual and tactile prompts, thereby doubly ensuring that the suction section 23 will not be over-extracted.

[0084] To reduce the potential discomfort felt by the patient, the tactile feedback groove 221 is an annular groove. The transition between the inner wall of the annular groove and the outer wall of the identification feedback segment 22 is a smooth surface, such as an arc or an inclined surface. Preferably, the maximum depth of the annular groove does not exceed 1 / 4 of its width. The width of the annular groove is preferably 0.3-1 mm.

[0085] To improve suction efficiency and maximize sputum removal, at least two side suction holes 231 are provided. Adjacent side suction holes 231 are spaced at a predetermined distance along the axis of the main airway 2a, allowing for staggered distribution of the side suction holes 231. This increases the effective suction depth range of the side suction holes 231. Preferably, the side suction holes 231 are distributed in a spiral pattern on the suction section 23.

[0086] The main pipe section 21, the sputum suction section 23 and the identification feedback section 22 are an integrated structure and are made of flexible materials, such as soft plastic or silicone, etc. More preferably, they can be transparent plastic or silicone materials.

[0087] In order to facilitate the operation of medical users, the surface of the main tube section 21 is provided with a scale mark for indicating the insertion depth, so that the operator can easily know the insertion depth.

[0088] Moreover, in order to improve the comfort and reduce damage during the insertion of the suction section 23 into the patient, the end of the suction section 23 is provided with an arc chamfer.

[0089] The aperture of the side suction hole 231 is smaller than the aperture of the main airway 2 a to ensure the axial sputum suction performance of the sputum suction section 23 .

[0090] 3 , the present invention also provides a second embodiment, which differs from the first embodiment in that, in order to reduce the impact of the sputum collecting cavity cleaning operation on the patient, a flushing baffle 133 corresponding to the second flushing tube 131 is further provided in the sputum collecting cavity 13 to prevent the flushing liquid injected from the second flushing tube 131 from entering the intubation connector 4.

[0091] The flushing baffle 133 is V-shaped or arc-shaped to guide the flushing liquid injected from the second flushing tube 131 to the inner wall of the sputum collecting cavity 13, thereby preventing the flushing liquid from entering the intubation connector 4, and at the same time better guiding the cleaning liquid to clean the inner wall of the sputum collecting cavity 13.

[0092] The closed sputum suction tube of Example 2 can effectively collect the sputum coughed up by the patient, prevent the sputum from flowing back into the endotracheal tube, reduce the workload of nursing staff, and improve treatment efficiency; at the same time, it can prevent the flushing fluid from splashing into the endotracheal tube, improve treatment efficiency, and improve treatment safety.

[0093] 4 , the present invention further provides a third embodiment, which differs from the first embodiment in that a diversion cavity 16 is provided in the sputum collecting cavity 13 , and the diversion cavity 16 is connected to a second flushing tube 131 ;

[0094] In the radial direction of the sputum collecting cavity 13, a plurality of flushing holes 161 are opened on both the inner and outer sides of the diversion cavity 16 for respectively flushing the inner wall of the sputum collecting cavity 13 and the sputum suction hose 2. Preferably, the diversion cavity 16 is arc-shaped.

[0095] The closed sputum suction tube of Example 3 can effectively collect the sputum coughed up by the patient, prevent the sputum from flowing back into the endotracheal tube, reduce the workload of nursing staff, and improve treatment efficiency; at the same time, it can efficiently clean the sputum collection cavity and the inside and outside of the sputum suction hose after suctioning, ensuring treatment safety, further improving treatment efficiency, and extending the service life of the sputum suction tube.

[0096] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A closed sputum suction tube, characterized in that: It includes a connector assembly and a sputum suction hose. The connector assembly includes a flushing cavity, a breathing cavity and a sputum collection cavity. The breathing cavity is provided with a ventilator connector for connecting to a ventilator pipeline, the sputum collecting cavity is provided with a cannula connector for connecting to an endotracheal cannula, and the flushing cavity is provided with a first flushing tube; The sputum suction hose can pass through the flushing cavity, the breathing cavity and the sputum collecting cavity, and enter the patient's respiratory tract to suck sputum; The sputum collecting cavity is also provided with a second flushing tube and a drainage tube.

2. The closed sputum suction tube according to claim 1, characterized in that: An isolation valve is provided between the flushing cavity and the breathing cavity.

3. The closed sputum suction tube according to claim 1, characterized in that: The two ends of the sputum suction hose are respectively a sputum suction end and a negative pressure access end, the sputum suction end is used for suctioning sputum, and the negative pressure access end is used for connecting a negative pressure pipeline; the negative pressure access end is provided with a control valve for controlling the opening and closing of the negative pressure pipeline.

4. The closed sputum suction tube according to claim 3, characterized in that: One end of the drainage tube is connected to the sputum collecting cavity, and the other end is connected to the sputum suction hose; The connection point between the drainage tube and the sputum suction hose is located between the control valve and the sputum suction end.

5. The closed sputum suction tube according to claim 1, characterized in that: The outer side of the sputum suction hose is covered with a transparent protective cover; The sputum suction hose is provided with a limit mark or a length mark for indicating the insertion depth; The breathing cavity is also provided with a drug delivery tube for delivering drugs to the patient's respiratory tract; The drainage tube is provided with a valve or a tube clamp.

6. The closed sputum suction tube according to claim 1, characterized in that: A guide tube corresponding to the intubation joint is provided at the connection point between the breathing cavity and the sputum collecting cavity. The diameter of the guide tube gradually decreases along the direction in which the sputum suction hose is inserted into the intubation joint.

7. The closed sputum suction tube according to any one of claims 1 to 6, characterized in that: A flushing baffle corresponding to the second flushing tube is provided in the sputum collecting cavity, which is used to prevent the flushing liquid injected from the second flushing tube from entering the intubation joint.

8. The closed sputum suction tube according to claim 7, characterized in that: The flushing baffle is V-shaped or arc-shaped, and is used to guide the flushing liquid to the inner wall of the sputum collecting cavity.

9. The closed sputum suction tube according to any one of claims 1 to 6, characterized in that: A retaining ring is provided at the connection point between the sputum collecting cavity and the intubation joint, for preventing the cleaning fluid injected from the second flushing tube from flowing into the intubation joint along the inner wall of the sputum collecting cavity.

10. The closed sputum suction tube according to any one of claims 1 to 6, characterized in that: A diversion cavity is provided in the sputum collecting cavity, and the diversion cavity is connected to the second flushing pipe; In the radial direction of the sputum collecting cavity, a plurality of flushing holes are opened on both sides of the diversion cavity for flushing the inner wall of the sputum collecting cavity and the sputum suction hose.

11. The closed sputum suction tube according to claim 1, characterized in that: The cannula connector includes a connector body and a plug connector, one end of the plug connector is provided with a sputum collection port for communicating with the sputum collection cavity, the other end is provided with a plug tube for communicating with the connector body, and the connector body is provided with an access tube for inserting the plug tube; The side wall of the insertion tube is provided with a locking block, and the inner side wall of the access tube is provided with a locking channel, the locking channel includes an insertion channel for inserting the locking block and a rotation channel for circumferential movement of the locking block, and the locking block enters the rotation channel along the insertion channel; The locking block is provided with a buckle portion, and a feedback portion for hindering the movement of the buckle portion is provided at a preset position of the rotation channel, so that the movement of the locking block is hindered by the combination or contact between the buckle portion and the feedback portion.

12. The closed sputum suction tube according to claim 11, characterized in that: The top surface of the buckle portion is an arc-shaped concave surface, and the feedback portion is a convex portion adapted to the arc-shaped concave surface; Guide slopes are provided on both sides of the feedback portion, and the buckle portion is provided with inclined surfaces corresponding to the guide slopes.

13. The closed sputum suction tube according to claim 11, characterized in that: An observation port corresponding to the rotation channel is opened on the outer side wall of the access pipe to expose the rotation channel.

14. The closed sputum suction tube according to claim 11, characterized in that: The joint body is provided with a main port and a communication channel. The main port is communicated with the access pipe through the communication channel. The diameter of the communication channel gradually decreases from the access pipe to the main port.

15. The closed sputum suction tube according to claim 14, characterized in that: The joint body is further provided with an auxiliary pipe communicating with the main port, and the auxiliary pipe is arranged obliquely relative to the access pipe.

16. The closed sputum suction tube according to claim 11, characterized in that: A sealing member is provided in the flushing cavity, and the sealing member is provided with a catheter hole adapted to the sputum suction hose; The sputum suction hose includes a main section for connecting to a negative pressure pipeline, a sputum suction section for suctioning sputum, and an identification feedback section. The main section, identification feedback section, and sputum suction section are connected in sequence to form a main airway for connecting to the negative pressure pipeline. The sputum suction section is provided with a side suction hole connected to the main airway, and the side wall of the identification feedback section is provided with a concave tactile feedback groove, so that when the tactile feedback groove passes through the catheter hole, it contacts the sealing member to form tactile feedback.

17. The closed sputum suction tube according to claim 16, characterized in that: The side wall of the identification feedback section is provided with a display area for reminding the user of the position, the display area is provided with an identification pattern of preset color and shape, and the display area is located between the tactile feedback groove and the main tube section.

18. The closed sputum suction tube according to claim 16, characterized in that: The end of the sputum suction section is provided with a main suction hole for suctioning sputum, and the side suction hole is provided on the side wall of the sputum suction section; There are at least two side suction holes; along the axial direction of the main airway, a preset spacing is left between adjacent side suction holes so that the side suction holes are staggered.

19. The closed sputum suction tube according to claim 16, characterized in that: The tactile feedback groove is an annular groove, and the transition between the inner side wall of the annular groove and the outer side wall of the identification feedback section is a smooth surface.

Images