Comfortable percutaneous tracheotomy cannula

Abstract

The comfortable percutaneous tracheotomy cannula comprises an outer cannula body, an inner cannula body, an air bag, a limiting plate and an auxiliary oxygen supply connector, the inner cannula body can penetrate through the outer cannula body along a central insertion pipeline, and the air bag and the limiting plate are installed outside the outer cannula body and are arranged close to the inner insertion end and the exposed end respectively; a positioning air channel only communicating the outside with the air bag is arranged on the tube wall of the outer sleeve, the auxiliary oxygen supply connector penetrates through the tube wall and extends into the inner sleeve so as to send oxygen into the central tube body air channel when the auxiliary oxygen supply connector is connected into oxygen supply equipment, and the use comfort can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, in particular to the technical field of percutaneous tracheotomy tubes. Background Art

[0002] In the field of clinical medicine, percutaneous tracheotomy is an important operation commonly used to establish an artificial airway, and is widely used in the treatment of patients requiring long-term mechanical ventilation and airway obstruction. As a key instrument for this operation, the performance of the percutaneous tracheotomy cannula is directly related to the patient's comfort, treatment effect, and the risk of complications.

[0003] Traditional percutaneous tracheostomy cannulas usually include an outer cannula, an inner cannula, an air bag and a limit plate, such as a new percutaneous tracheostomy cannula with publication number CN209270554U, a compression hemostasis percutaneous tracheostomy cannula with publication number CN208640799U and a percutaneous tracheostomy cannula with publication number CN105617501B. During use, the outer cannula and the inner cannula arranged inside and outside each other can be used as oxygen supply lines for oxygen in and out; however, when suctioning the patient using the oxygen supply line, this single air path design can temporarily put the patient in a state of complete asphyxiation; this situation not only causes great pain to the patient, but may also have an adverse effect on the patient's treatment and recovery.

[0004] Percutaneous tracheotomy is very irritating to the patient, especially when inserting and removing the overtube. Before intubation, local anesthetics are usually applied to the outside of the overtube to reduce the irritation caused by intubation. However, since the overtube is left in place for a long time (the pre-applied local anesthetic will gradually lose its efficacy), and the limiting plate will block the overtube, making it difficult for medical staff to re-apply local anesthetics to the overtube before extubation, patients may still suffer from the discomfort caused by extubation.

[0005] In summary, the existing percutaneous tracheotomy tube has obvious deficiencies in reducing the stimulation of insertion and removal and ensuring the patient's oxygen supply during suctioning. There is an urgent need for a new design that can improve patient comfort and optimize the treatment process. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems in the prior art and to provide a comfortable percutaneous tracheotomy tube that can effectively improve the comfort of use.

[0007] To achieve the above object, the present invention provides a comfortable percutaneous tracheotomy cannula, which includes an outer cannula, an inner cannula, an airbag, a limiting plate and an auxiliary oxygen supply connector. The inner cannula can penetrate through the outer cannula along the central insertion pipe. The airbag and the limiting plate are respectively installed outside the outer cannula and are arranged near the inner insertion end and the exposed end. The outer cannula is provided with a positioning air passage on the pipe wall that only communicates with the outside and the airbag. The auxiliary oxygen supply connector penetrates through the pipe wall and extends into the inner cannula to send oxygen into the central pipe body air passage when the oxygen supply device is connected.

[0008] Preferably, the outer cannula is provided with a chute that is L-shaped and has one end penetrating to the exposed end on the inner wall. The inner cannula is provided with a slider on the outer wall that can be slidably fitted into the chute.

[0009] Preferably, the inner cannula is further provided with an annular boss on the outer wall that can just abut against the outer cannula at the exposed end when the slider slides along the chute to the end of the chute. The auxiliary oxygen supply connector is installed at the annular boss.

[0010] Preferably, the limiting plate is provided with a plurality of plate grooves for respectively tying straps.

[0011] Preferably, the auxiliary oxygen supply connector includes a fixed connector, a movable connector, an elastic driving member and a baffle. One end of the fixed connector is fixed to the inner cannula through a positioning pipe, and the other end simultaneously houses the elastic driving member and the baffle through a fixed expansion pipe. A fixed passage communicating with the central pipe body air passage is provided between the positioning pipe and the fixed expansion pipe. The baffle cuts off the fixed passage under normal circumstances and is driven by the elastic driving member. One end of the movable connector has a plug for connecting to the oxygen supply device, and the other end is provided with a movable expansion pipe that can be threadedly connected to the fixed expansion pipe. The movable connector also has a push pipe that can push open the baffle until the fixed passage is opened during the threaded connection of the fixed expansion pipe and the movable expansion pipe. A movable passage communicating the fixed passage with the oxygen supply device is also provided between the movable expansion pipe and the push pipe.

[0012] Preferably, the elastic driving member is a spring, and the fixed connector and the baffle are respectively provided with a first sleeve and a second sleeve for the spring to be sleeved.

[0013] Preferably, a first sealing ring that can be compressed when the baffle cuts off the fixed passage is further provided between the fixed connector and the baffle, and a second sealing ring that can be compressed when the baffle opens the fixed passage is further provided between the fixed connector and the movable connector.

[0014] Preferably, an auxiliary catheter is further included. The auxiliary catheter is located in the central pipe body air passage, and one end is arranged near the inner insertion end, and the other end is connected to the auxiliary oxygen supply connector.

[0015] Preferably, a plurality of diversion grooves that respectively penetrate through the limiting plate are provided in a circumferential manner on the outer wall of the outer cannula.

[0016] Preferably, an annular groove communicating with each flow guiding groove is further provided on the outer wall of the outer sleeve, and the annular groove is arranged on the side of the limiting plate away from the human body.

[0017] Advantages of the present invention: 1) By adding an auxiliary oxygen supply joint on the inner sleeve, the inner sleeve can be connected to the sputum suction device and the oxygen supply device at the same time, realizing the intermittent alternating operation of "sputum suction - oxygen supply", avoiding the risk of patient asphyxia caused by the traditional single gas path design (that is, using the double gas path design to ensure continuous oxygen supply), especially suitable for patients who need long-term mechanical ventilation, and reducing the occurrence probability of complications (such as arrhythmia, cerebral hypoxia) caused by short-term hypoxia; 2) By using the auxiliary catheter to extend the oxygen output end to the position near the inner insertion end of the central tube body gas path and making the auxiliary catheter discharge gas from the side, it can not only make the oxygen closer to the deep part of the patient's airway, improve the oxygen supply efficiency, reduce gas waste, but also avoid the backflow of sputum into the auxiliary oxygen supply joint; 3) By jointly using the fixed connector, the movable connector, the elastic driving member, the baffle, the first sealing ring and the second sealing ring to form the auxiliary oxygen supply joint, it can not only automatically cut off the passage between the auxiliary oxygen supply joint and the outside by using the elastic driving member to drive the baffle in the daily state, but also automatically open this passage quickly when the fixed connector and the movable connector are threadedly connected, and the first sealing ring and the second sealing ring can also assist in sealing in the two states respectively to prevent gas leakage; 4) By setting the slider and the sliding groove between the outer sleeve and the inner sleeve to form a self-locking mechanism, so that medical staff can quickly lock or unlock the inner sleeve when rotating the inner sleeve, which can prevent the accidental detachment of the inner sleeve while taking into account the operation convenience and ensure the airway patency; 5) By adding an annular boss outside the inner sleeve, it can not only limit the insertion depth of the inner sleeve by the top support between the annular boss and the outer sleeve, avoid the inner sleeve being inserted too deep and damaging the airway mucosa, but also use the annular boss to provide a stable installation base for the auxiliary oxygen supply joint to prevent oxygen leakage caused by its loosening; 6) By adding an annular groove and a flow guiding groove outside the outer sleeve, it is convenient for medical staff to drop local anesthetic drugs from the annular groove before extubation and make the local anesthetic drugs evenly distributed along the flow guiding groove, thus making up for the defect that the traditional pre-applied drugs lose their efficacy due to long retention time, reducing the pain stimulation during extubation, and further improving the patient comfort.

[0018] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the drawings. Brief Description of the Drawings

[0019] Figure 1 is the front view of Embodiment 1; Figure 2It is a cross-sectional view when the first embodiment assembles the outer sleeve, the airbag and the limit plate; Figure 3 It is a top view when the first embodiment assembles the outer sleeve and the limit plate; Figure 4 It is a cross-sectional view when the first embodiment assembles the inner sleeve and the auxiliary oxygen supply joint; Figure 5 It is Figure 4 an enlarged schematic view of part A of Figure 6 It is a cross-sectional view when the first embodiment assembles the fixed connector, the elastic driving member, the baffle and the first seal; Figure 7 It is a cross-sectional view when the first embodiment assembles the moving connector and the second sealing ring; Figure 8 It is a cross-sectional view when the second embodiment assembles the inner sleeve, the auxiliary conduit and the auxiliary oxygen supply joint; Figure 9 It is a cross-sectional view when the third embodiment assembles the outer sleeve, the airbag and the limit plate; Figure 10 It is a cross-sectional view when the fourth embodiment assembles the outer sleeve, the airbag and the limit plate.

[0020] In the figure: 1 - outer sleeve, 11 - central insertion pipe, 12 - positioning air path, 13 - chute, 14 - diversion groove, 15 - annular groove, 16 - subglottic suction port, 17 - subglottic suction joint, 18 - subglottic suction tube, 2 - inner sleeve, 21 - central tube body air path, 22 - annular boss, 3 - airbag, 4 - limit plate, 41 - plate groove, 5 - auxiliary conduit, 6 - auxiliary oxygen supply joint, 61 - fixed connector, 611 - positioning pipe, 612 - fixed expansion pipe, 613 - fixed passage, 614 - first sleeve, 62 - moving connector, 621 - plug, 622 - moving expansion pipe, 623 - push tube, 624 - moving passage, 63 - elastic driving member, 64 - baffle, 641 - second sleeve, 65 - first sealing ring, 66 - second sealing ring. Detailed implementation manners

[0021] The first embodiment: Refer to Figures 1 to 7, this embodiment includes an outer sleeve 1, an inner sleeve 2, an airbag 3, a limit plate 4, and an auxiliary oxygen supply connector 6. The inner sleeve 2 can penetrate the outer sleeve 1 along the central insertion pipe 11. The airbag 3 and the limit plate 4 are respectively installed outside the outer sleeve 1 and are arranged near the inserted end and the exposed end. The outer sleeve 1 is provided with a positioning air passage 12 on the pipe wall that only communicates the outside with the airbag 3. The auxiliary oxygen supply connector 6 passes through the pipe wall and extends into the inner sleeve 2 to send oxygen into the central pipe body air passage 21 when the oxygen supply device is connected. Among them, both the outer sleeve 1 and the inner sleeve 2 are bent pipes with a bent lower end, thus more conforming to the physiological bending trend of the human airway. It can reduce the hard extrusion of the airway during insertion, reduce the intubation resistance and the risk of mucosal damage, and is especially suitable for patients who need long-term catheterization.

[0022] The outer sleeve 1 is provided with a chute 13 on the inner wall, one end of which penetrates to the exposed end and is L-shaped. The inner sleeve 2 is provided with a slider on the outer wall that can be slidably fitted into the chute 13. Among them, the sliding fit between the chute 13 and the slider can realize the locking and unlocking between the outer sleeve 1 and the inner sleeve 2.

[0023] The inner sleeve 2 is further provided with an annular boss 22 on the outer wall that can just abut against the outer sleeve 1 at the exposed end when the slider slides to the end of the chute 13. The auxiliary oxygen supply connector 6 is installed at the annular boss 22. Among them, the annular boss 22 can not only limit the downward movement position of the inner sleeve 2, but also increase the installation stability of the auxiliary oxygen supply connector 6.

[0024] The limit plate 4 is provided with a number of plate grooves 41 for tying straps respectively.

[0025] The auxiliary oxygen supply connector 6 includes a fixed connector 61, a movable connector 62, an elastic driving member 63, and a baffle 64. One end of the fixed connector 61 is fixed to the inner sleeve 2 through a positioning pipe 611, and the other end simultaneously houses the elastic driving member 63 and the baffle 64 through a fixed expansion pipe 612. A fixed passage 613 communicating with the central pipe body air passage 21 is provided between the positioning pipe 611 and the fixed expansion pipe 612. The baffle 64 cuts off the fixed passage 613 driven by the elastic driving member 63 under normal circumstances. One end of the movable connector 62 has a plug 621 that can access the oxygen supply device, and the other end is provided with a movable expansion pipe 622 that can be threadedly connected to the fixed expansion pipe 612. The movable connector 62 also has a push pipe 623 that can push open the baffle 64 until the fixed passage 613 is opened during the threaded connection between the fixed expansion pipe 612 and the movable expansion pipe 622. A movable passage 624 that can communicate the fixed passage 613 with the oxygen supply device is also provided between the movable expansion pipe 622 and the push pipe 623.

[0026] The elastic driving member 63 is a spring. The fixed connector 61 and the baffle 64 are respectively provided with a first sleeve 614 and a second sleeve 641 for the spring to be sleeved.

[0027] A first sealing ring 65 that can be compressed when the baffle 64 cuts off the fixed passage 613 is further provided between the fixed connector 61 and the baffle 64, and a second sealing ring 66 that can be compressed when the baffle 64 opens the fixed passage 613 is further provided between the fixed connector 61 and the movable connector 62.

[0028] The working process of this embodiment: During use, first insert the outer sleeve 1 into the airway, and then tie the limit plate 4 to the neck through the strap passing through the plate groove 41 of the limit plate 4; then, send air into the airbag 3 through the positioning air passage 12 until the airbag 3 expands to further prevent the outer sleeve 1 from slipping in the airway; then, insert the inner sleeve 2 through the central insertion pipe 11 through the outer sleeve 1, and then rotate the inner sleeve 2 until the slider slides to the end of the groove along the chute 13; finally, indirectly connect the inner sleeve 2 to the oxygen supply device through a hose at the exposed end, and artificial oxygen supply can be carried out on the patient by using the central pipe body air passage 21; in addition, the inner sleeve 2 can also be indirectly connected to the sputum suction device through a hose at the exposed end, so as to suck sputum from the patient's body by using the central pipe body air passage 21.

[0029] During the sputum suction operation, supplementary oxygen can also be supplied by using the auxiliary oxygen supply joint 6; specifically, first threadedly connect the fixed expansion tube 612 and the movable expansion tube 622, so that the push tube 623 slowly pushes open the baffle 64 as the fixed connector 61 and the movable connector 62 gradually approach until the fixed passage 613 is connected to the movable passage 624, and then install a hose between the plug 621 and the oxygen supply device (that is to say, the inner sleeve 2 can be connected to the sputum suction device and the oxygen supply device at the same time); at this time, the sputum suction operation and the oxygen supply operation can be carried out intermittently; during the oxygen supply operation, oxygen can be injected into the body along the movable passage 624, the fixed passage 613 and the central pipe body air passage 21.

[0030] Embodiment Two: Refer to Figure 8 , and it further includes an auxiliary catheter 5. The auxiliary catheter 5 is located in the central pipe body air passage 21, and one end of it is arranged close to the inner insertion end and the other end is connected to the auxiliary oxygen supply joint 6; wherein, the auxiliary catheter 5 can set the air outlet at the side; compared with Embodiment One, oxygen can first flow downward along the auxiliary catheter 5 inside the central pipe body air passage 21, and then be released from the auxiliary catheter 5 and the central pipe body air passage 21 near the air outlet part; in addition, the side air outlet design can further prevent sputum from being sucked into the auxiliary catheter 5 and the auxiliary oxygen supply joint 6.

[0031] Others are the same as Embodiment One.

[0032] Embodiment Three: Refer to Figure 9, a plurality of diversion grooves 14 are arranged around the outer wall of the outer sleeve 1 and respectively penetrate through the limiting plate 4.

[0033] An annular groove 15 that is simultaneously communicated with each diversion groove 14 is further arranged on the outer wall of the outer sleeve 1, and the annular groove 15 is arranged on the side of the limiting plate 4 away from the human body.

[0034] The others are the same as in Embodiment 2.

[0035] The working process of this embodiment: When it is necessary to pull out the outer sleeve 1, local anesthetic drugs can be dropped from the annular groove 15 and the local anesthetic drugs can flow downward along each diversion groove 14, so as to realize the supplementary coating of local anesthetic drugs before tube pulling and reduce the tube pulling stimulation.

[0036] Embodiment 4: On the basis of Embodiments 1 to 3, a subglottic suction function can be further added to the outer sleeve 1; specifically, a subglottic suction joint 17 (located above the limiting plate 4) and a subglottic suction port 16 (located above the airbag 3) that communicate the outside with the central insertion pipe 11 can be respectively added to the upper and lower parts of the wall of the outer sleeve 1, and then a subglottic suction pipe 18 is connected to the subglottic suction port 16 and the subglottic suction joint 17 in the central insertion pipe 11; in addition, in order to prevent the subglottic suction pipe 18 from affecting the insertion of the inner sleeve 2, the subglottic suction pipe 18 can be embedded in the inner wall of the outer sleeve 1.

[0037] During use, a syringe or a suction device can be directly installed at the subglottic suction joint 17 to drain the subglottic retention (the subglottic retention can gradually drain out along the subglottic suction port 16, the subglottic suction pipe 18 and the subglottic suction joint 17).

[0038] The above embodiments are illustrative of the present invention, not limiting of the present invention, and any scheme obtained by simply transforming the present invention belongs to the protection scope of the present invention.

Claims

1. Comfortable percutaneous tracheotomy cannula, characterized in that: It includes an outer sleeve (1), an inner sleeve (2), an airbag (3), a limiting plate (4) and an auxiliary oxygen supply joint (6). The inner sleeve (2) can penetrate through the outer sleeve (1) along the central insertion pipe (11). The airbag (3) and the limiting plate (4) are respectively installed outside the outer sleeve (1) and are arranged near the insertion end and the exposed end. The outer sleeve (1) is provided with a positioning air path (12) on the pipe wall that only communicates the outside with the airbag (3). The auxiliary oxygen supply joint (6) passes through the pipe wall and extends into the inner sleeve (2) to send oxygen into the central pipe body air path (21) when the oxygen supply device is connected.

2. The comfortable percutaneous tracheotomy cannula according to claim 1, wherein: The outer sleeve (1) is provided with a chute (13) at the inner wall, one end of which penetrates to the exposed end and is L-shaped. The inner sleeve (2) is provided with a slider at the outer wall that can be slidably fitted into the chute (13).

3. The comfortable percutaneous tracheotomy cannula according to claim 2, wherein: The outer wall of the inner sleeve (2) is further provided with an annular boss (22) that can just abut against the outer sleeve (1) at the exposed end when the slider slides to the end of the chute (13). The auxiliary oxygen supply joint (6) is installed at the annular boss (22).

4. The comfortable percutaneous tracheotomy cannula according to claim 1, wherein: The limiting plate (4) is provided with a number of plate grooves (41) for the binding straps to be respectively tied.

5. The comfortable percutaneous tracheotomy cannula according to claim 1, wherein: The auxiliary oxygen supply joint (6) includes a fixed connector (61), a movable connector (62), an elastic driving member (63) and a baffle (64). One end of the fixed connector (61) is fixed to the inner sleeve (2) through a positioning pipe (611), and the other end simultaneously houses the elastic driving member (63) and the baffle (64) through a fixed expansion pipe (612). A fixed passage (613) communicating with the central pipe body air path (21) is provided between the positioning pipe (611) and the fixed expansion pipe (612). Under normal circumstances, the baffle (64) is driven by the elastic driving member (63) to cut off the fixed passage (613). One end of the movable connector (62) has a plug (621) that can access the oxygen supply device, and the other end is provided with a movable expansion pipe (622) that can be threadedly connected to the fixed expansion pipe (612). The movable connector (62) also has a push pipe (623) that can push open the baffle (64) until the fixed passage (613) is opened during the threaded connection between the fixed expansion pipe (612) and the movable expansion pipe (622). A movable passage (624) that can communicate the fixed passage (613) with the oxygen supply device is further provided between the movable expansion pipe (622) and the push pipe (623).

6. The comfortable percutaneous tracheotomy cannula according to claim 5, wherein: The elastic driving member (63) is a spring. The fixed connector (61) and the baffle (64) are respectively provided with a first sleeve (614) and a second sleeve (641) for the spring to be sleeved.

7. The comfortable percutaneous tracheotomy cannula according to claim 5, characterized in that: A first sealing ring (65) that can be compressed when the baffle (64) cuts off the fixed passage (613) is further provided between the fixed connector (61) and the baffle (64). A second sealing ring (66) that can be compressed when the baffle (64) opens the fixed passage (613) is further provided between the fixed connector (61) and the movable connector (62).

8. The comfortable percutaneous tracheotomy cannula according to claim 5, characterized in that: It further includes an auxiliary conduit (5). The auxiliary conduit (5) is located in the central pipe body air path (21), one end of which is arranged near the insertion end and the other end accesses the auxiliary oxygen supply joint (6).

9. The comfortable percutaneous tracheotomy cannula according to any one of claims 1 to 8, characterized in that: A plurality of diversion grooves (14) which respectively pass through the limit plate (4) are circumferentially arranged on the outer wall of the outer sleeve (1).

10. The comfortable percutaneous tracheotomy cannula according to claim 9, characterized in that: An annular groove (15) which is simultaneously communicated with each diversion groove (14) is further arranged on the outer wall of the outer sleeve (1), and the annular groove (15) is arranged on the side of the limit plate (4) away from the human body.

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