CN216496927U - A autogenous cutting sleeve pipe and autogenous cutting sleeve pipe assembly for during neck tumour postoperative radiotherapy - Google Patents

Abstract

The utility model discloses a tracheostomy cannula assembly used during radiotherapy after head and neck tumor operation, which comprises a portable infusion pump and a tracheostomy cannula, wherein the tracheostomy cannula comprises an inner tube and an outer cannula sleeved outside the inner tube, the upper end of the inner tube is exposed outside the outer cannula, the upper end of the outer cannula is provided with a fixing plate, the fixing plate is provided with a limiting piece, and the tracheostomy cannula assembly is characterized in that: the portable infusion device is characterized in that a first humidification pipe is arranged outside the outer sleeve, one end of the first humidification pipe is communicated with an outer connecting hole in the outer sleeve, the other end of the first humidification pipe is communicated with the portable infusion pump, and a switch valve is arranged in the first humidification pipe or the outer connecting hole. The utility model provides an tracheostomy cannula assembly used during postoperation radiotherapy of head and neck tumors, which can prevent a humidifying tube from falling off, thereby reducing the risk of infection caused by pollution of the humidifying tube, enabling medical personnel to carry out humidifying operation more conveniently and simultaneously facilitating free walking of a patient.

Description

A autogenous cutting sleeve pipe and autogenous cutting sleeve pipe assembly for during neck tumour postoperative radiotherapy

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a tracheostomy cannula and a tracheostomy cannula assembly used during radiotherapy after head and neck tumor operation.

Background

Radiotherapy is a very important treatment means in the treatment of head and neck tumors. About 80% of patients with head and neck tumors need radiotherapy and have good effects. The space of the head and the neck is narrow, a plurality of important organs are concentrated, and in addition, the parts of the organs are mutually staggered, so that the tumor is difficult to be completely removed in the operation. The head and neck control a number of important physiological functions including voice, speech, eating, breathing, viewing, listening, olfactory sensation, etc. Extensive surgical resection entails a loss of the above-mentioned function.

In the process of radiotherapy, the rays can also influence normal tissues while killing tumor tissues, generate radiotherapy reaction and generate various radiotherapy complications in severe cases. Wherein the adverse reaction of radiotherapy of skin and mucous membrane is obvious. The reaction of the mucosa to radiotherapy is manifested as mucositis, which occurs significantly earlier than radiodermatitis, and is manifested as atrophy, telangiectasia, ulcer, etc. in different degrees. Therefore, the management of closing an air injection channel is particularly important for head and neck tumor patients with tracheal tubes during radiotherapy, and the key of keeping the air channel smooth is to moisten the air channel.

In the prior art, an external humidifying pipe is directly extended into a central airway in the process of humidifying the airway of a tumor patient with an tracheostomy cannula, so that the patient is easy to choke, the humidifying pipe is easy to separate along with the choked airflow or sputum after the patient chokes, and the medical care personnel are required to repeatedly re-insert the separated humidifying pipe into the tracheostomy cannula on the patient, thereby easily increasing the risk of infection.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solve at least some of the problems of the related art: the utility model provides an autogenous cutting sleeve pipe that is used for neck tumour postoperative during radiotherapy, it can avoid the humidifying pipe to deviate from to the risk that causes the infection after having reduced the humidifying pipe pollution, and make medical personnel carry out the humidifying operation more convenient.

The present invention is directed to solve at least the second technical problem in the related art to some extent: the utility model provides an autogenous cutting sleeve subassembly for during neck tumour postoperative radiotherapy, it is on the basis that can avoid the humidifying pipe to deviate from for the patient can freely walk at the in-process of carrying out the air flue humidifying.

Therefore, an object of the present invention is to provide a tracheostomy cannula for use in radiotherapy after head and neck tumor surgery, which comprises an inner tube and an outer cannula sleeved outside the inner tube, wherein the upper end of the inner tube is exposed outside the outer cannula, the upper end of the outer cannula is provided with a fixing plate, the fixing plate is provided with a limiting member for limiting the relative movement of the inner tube and the outer cannula, and the tracheostomy cannula is characterized in that: the outer sleeve is provided with a first humidifying conduit at a position close to the fixing piece, one end of the first humidifying conduit is communicated with an outer connecting hole in the outer sleeve, and a switch valve is arranged in the first humidifying conduit or the outer connecting hole. Thereby make medical personnel can carry out humidification treatment to patient's air flue through external first humidification pipe, owing to saved originally as for the additional humidification pipe of inner tube, consequently should not cause the patient to chock and cough for patient's humidification process is releived more, and the problem that the humidification pipe of shelving originally was taken out and is come off also can not take place to take place when patient expectorates simultaneously, has consequently significantly reduced the infection problem that the humidification pipe arouses after being contaminated.

Preferably, the switch valve comprises a membrane valve plate, the membrane valve plate is installed in the outer connecting hole, an opening is formed in the membrane valve plate, and the membrane valve plate responds to pressure difference between two sides of the membrane valve plate to enable the opening to be opened under pressure or closed in a reset mode. Through setting up the film valve block not only simple structure can completely cut off the space inside and outside the overcoat pipe when the patient does not carry out the humidification treatment moreover, and can open the film valve block automatically through the increase of pressure at the humidification in-process.

Preferably, the inner pipe is provided with an inner connecting hole at a position corresponding to the outer connecting hole, the inner connecting hole is communicated with the outer connecting hole, and the inner connecting hole is covered with a filter screen. The inner connecting hole is arranged to enable the humidifying catheter to be communicated with the inner connecting hole through the outer connecting hole, so that humidifying treatment can be conveniently carried out through the inner tube.

Preferably, the filter screen is an arc filter screen which is concave towards the position of the central axis of the inner pipe. Through the arc-shaped filter screen with the concave part, the sputum taking process of the medical staff for the patient is simple.

Preferably, an elastic ring sleeve is arranged between the outer connecting hole and the inner connecting hole, one end of the elastic ring sleeve is fixedly connected with the inner side wall of the outer sleeve or the outer side wall of the inner pipe, the other end of the elastic ring sleeve abuts against the outer side wall of the inner pipe or the inner side wall of the outer sleeve, and the outer connecting hole in the outer sleeve is communicated with the inner connecting hole through the elastic ring sleeve.

Preferably, the inner side wall of the outer sleeve is in clearance fit with the outer side wall of the inner pipe, a second humidifying catheter is arranged at a position, close to the fixing piece, outside the outer sleeve, the second humidifying catheter is communicated with the outer sleeve, and the second humidifying catheter and the first humidifying catheter are arranged at intervals.

Preferably, the other end of the second humidifying conduit, which is far away from the outer sleeve, is communicated with the first humidifying conduit through a three-way valve.

Preferably, the inner tube is of a circular arc structure, and the outer sleeve is matched with the inner tube.

To this end, an object of the present invention is to provide an tracheostomy cannula assembly for use during postoperation radiotherapy of head and neck tumors, which comprises a portable infusion pump and said tracheostomy cannula, wherein one end of a first humidification conduit in said tracheostomy cannula communicates with an external connection hole on the external cannula, and the other end communicates with an air supply port of the portable infusion pump.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

The technical scheme has the following advantages or beneficial effects: firstly, because the humidifying pipe of integral type structure is integrated on outer sleeve pipe, consequently reduced the risk that the patient chocked and coughs, also avoided the problem that the humidifying pipe deviate from simultaneously, secondly, through linking to each other humidifying pipe and portable infusion pump for the patient can freely walk about at the in-process of carrying out the humidifying treatment, and the patient can lie and can walk off the bed walking along with oneself wish, and freely move about, makes the quality of life during being in hospital have obvious improvement.

Drawings

FIG. 1 is a schematic view of the construction of a tracheostomy cannula assembly of the present invention.

Fig. 2 is an exploded view of the gas shear sleeve assembly of fig. 1.

FIG. 3 is a schematic top view of the tracheostomy cannula assembly of the present invention with the portable infusion pump removed.

Fig. 4 is a schematic sectional view taken along the direction "a-a" in fig. 3.

FIG. 5 is a schematic sectional view taken along the line "B-B" in FIG. 3.

FIG. 6 is a schematic cross-sectional view taken in the direction "C-C" of FIG. 5.

Fig. 7 is a schematic cross-sectional view of fig. 5 in a perspective state.

Fig. 8 is a partially enlarged view of the region "D" in fig. 7.

FIG. 9 is a schematic view of the structure of the outer sheath with only the first humidification catheter of the present invention.

FIG. 10 is a schematic view of the construction of an outer sleeve with a first humidifying conduit and a second humidifying conduit according to the present invention.

FIG. 11 is a schematic view of the inner tube structure of the present invention.

FIG. 12 is a schematic view showing the structure of the core tube according to the present invention.

FIG. 13 is a schematic view of the first diaphragm valve in a compressed and opened state according to the present invention.

FIG. 14 is a schematic structural diagram of the first diaphragm valve in a reset closed state according to the present invention.

FIG. 15 is a schematic structural view of a second diaphragm valve sheet in a pressed open state according to the present invention.

FIG. 16 is a schematic structural diagram of the second diaphragm valve in a reset closed state according to the present invention.

Wherein, 100, autogenous cutting sleeve; 1. an inner tube; 1.1, flanging; 1.2, a gap; 2. an outer sleeve; 3. a core tube; 4. a fixing sheet; 4.1, clamping blocks; 5. a limiting member; 5.1, a plectrum; 5.2, a locking piece; 6. a first humidification conduit; 7. an outer connecting hole; 8. a thin film valve plate; 8.1, opening; 9. an inner connection hole; 10. a filter screen; 11. an elastic ring sleeve; 12. a second humidification conduit; 200. a portable infusion pump.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

The tracheostomy cannula assembly for use during post-operative radiotherapy of head and neck tumors according to an embodiment of the utility model will be described in detail below with reference to the accompanying drawings.

The first embodiment is as follows:

the utility model provides a tracheostomy cannula used in radiotherapy period after head and neck tumor operation, as shown in figure 1, it includes an inner tube 1 and an outer cannula 2 sleeved outside the inner tube 1, the inner tube 1 and the outer cannula 2 are both tubular structures with two through ends, most of the inner tube 1 is inserted into the outer cannula 2 so as to expose a small part of the upper end of the inner tube 1 outside the outer cannula 2, the outer cannula 2 needs to be inserted into the trachea of a patient and can fix the outer cannula 2 on the body of the patient in the using process, therefore, a fixing plate 4 needs to be arranged at the upper end of the outer cannula 2, as shown in figure 9 and figure 10, the fixing plate 4 is an oval sheet structure, the fixing plate 4 is integrally formed with the outer cannula 2, and a channel matched with the upper end orifice of the outer cannula 2 is arranged at the position of the fixing plate 4 corresponding to the orifice of the outer cannula 2, therefore, the lower end of the inner tube 1 can be smoothly inserted into the outer sleeve 2 through the channel on the fixing plate 4, and after the inner tube 1 is inserted to a certain depth, the inner tube 1 and the outer sleeve need to be fixed to each other, so that the problems of the inner tube 1 falling off and the like are avoided, and the fixing plate 4 is further provided with a limiting part 5 for limiting the relative movement of the inner tube 1 and the outer sleeve 2, and the device is characterized in that: a first humidifying conduit 6 is arranged on the outer side wall of the outer sleeve 2 and close to the fixing piece 4, one end of the first humidifying conduit 6 is communicated with an outer connecting hole 7 on the outer sleeve 2, and a switch valve is arranged in the first humidifying conduit 6 or the outer connecting hole 7. In order to avoid the detachment of the first humidifying conduit 6 and the outer sleeve 2 in the humidifying process, the first humidifying conduit 6 and the outer sleeve 2 can be fixedly connected, preferably, the first humidifying conduit 6 and the outer sleeve 2 are of an integral structure, the first humidifying conduit 6 is communicated with the inner space of the outer sleeve 2 through an outer connecting hole 7 formed in the outer sleeve 2, and at the moment, liquid supplied to the humidifying conduit 6 through external liquid supply equipment can enter the outer sleeve 2 to humidify the airway of the patient. Because the assembly clearance must be left between outer tube 2 and the inner tube 1, consequently send into the clearance between this outer tube 2 and the inner tube 1 with liquid and carry out the humidification in patient's air flue along the clearance inflow between outer tube 2 and the inner tube 1, can not directly drip down, its advantage compared with prior art has been removed from and has been choked and coughed because the upper end mouth of pipe of inner tube 1 inserts an additional humidifying pipe and cause, consequently, the humidifying process is more smooth-going, should not cause patient's discomfort, simultaneously, the humidifying pipe is installed in the outer tube outside from this, consequently, can not have because patient's expectoration and lead to originally additional humidifying pipe to deviate from and the problem of putting into again repeatedly, this has just reduced the humidifying pipe and has been polluted and has caused the risk of infection.

Of course, as an improvement, in order to reduce the problem that the humidification process is not efficient due to the small gap between the outer sleeve 2 and the inner tube, the improvement of the present embodiment is: the inner pipe 1 is provided with an inner connecting hole 9 at a position corresponding to the outer connecting hole 7, the inner connecting hole 9 is communicated with the outer connecting hole 7, and the inner connecting hole 9 is covered with a filter screen 10. Therefore, the humidifying liquid fed in from the humidifying catheter 6 can directly flow into the air passage of the patient through the inner wall of the inner tube 1 through the inner connecting hole 9, so that the patient can efficiently complete the medical advice of the air passage humidification prescribed by the doctor, and the effect of high-efficiency humidification is achieved.

Because the existence of outer connecting hole 7 and inner connecting hole 9, consequently the patient can be through first humidifying pipe 6 direct and external environment intercommunication when not humidifying patient's trachea, causes the infection scheduling problem easily this moment, so the improvement of this embodiment lies in: a switching valve is arranged in the first humidifying conduit 6 or the external connecting hole 7, and the switching valve can be opened and closed. Preferably, as shown in fig. 13 to 16, the switch valve includes a membrane valve plate 8, the membrane valve plate 8 is installed in the external connection hole 7, the outer edge of the membrane valve plate 8 is fixed to the inner wall of the external connection hole 7, the fixed portion is sealed, an opening 8.1 is formed in the membrane valve plate 8, and the membrane valve plate 8 responds to pressure difference between two sides of the membrane valve plate 8, so that the opening 8.1 is pressed to be opened or reset to be closed.

Specifically, the film valve plate 8 is preferably made of silica gel, the film valve plate 8 comprises two or three valves, all the valves are spliced in the horizontal direction to form a circular structure, and the joint of any two adjacent valves is abutted against the joint under the action of the elastic force of the valves to be sealed.

In order to make it more convenient for medical personnel to take sputum from patients for testing, the improvement of this embodiment lies in: the arc filter screen 10 of filter screen 10 for the axis position indent towards inner tube 1, the intermediate position of this filter screen 10 is protruding towards inner tube 1 promptly, makes the patient can adsorb the sputum on filter screen 10 at the in-process of physiological reactions such as humidifying in-process expectoration from this, and medical personnel only need take out the inner tube 1 or aspirate the sputum with on the filter screen that first humidifying pipe 6 can both be convenient and take out, accomplish the drawing to the sputum.

When internal connection hole 9 on the inner tube 1 and the external connection hole 7 on the outer tube 2 correspond relatively, although the liquid that injects from first humidifying pipe 6 in the humidifying process can flow into inner tube 1 from internal connection hole 9, but often can leave assembly gap between inner tube 1 and the outer tube 2, thereby if medical personnel need aspirate first humidifying pipe 6 because the position between internal connection hole 9 and the external connection hole 7 leaves the clearance when extracting the sputum on the filter screen 10 including inner tube 1 and outer tube 2, consequently, the efficiency 2 of suction has been reduced, so, can be extracted by the efficient more in order to improve medical personnel from the sputum on the in-process filter screen 10 of first humidifying pipe 6 suction sputum, the improvement of this embodiment lies in: an annular elastic change sleeve is additionally arranged between the inner pipe 1 and the outer sleeve 2, the elastic ring sleeve 11 is positioned between the outer connecting hole 7 and the inner connecting hole 9, if one end of the elastic ring sleeve 11 is fixedly connected with the inner side wall of the outer sleeve 2, the other end of the elastic ring sleeve 11 is abutted against the inner side wall of the outer side wall of the inner pipe 1, if one end of the elastic ring sleeve 11 is fixedly connected with the outer side wall of the inner pipe 1, the other end of the elastic ring sleeve 11 is abutted against the inner side wall of the outer sleeve 2, therefore, the elastic ring sleeve 11 constructs a closed channel between the outer connecting hole 7 and the inner connecting hole 9, and the outer connecting hole 7 on the outer sleeve 2 is communicated with the inner connecting hole 9 through the elastic ring sleeve 11. In this case, due to the elastic collar 11, the size requirement for the fit between the outer sleeve 2 and the inner tube 1 can be reduced, i.e. a larger gap can be left between the outer sleeve 2 and the inner tube 1.

Preferably, the medical staff is required to selectively humidify the trachea of the patient slowly through the gap between the outer cannula 2 and the inner tube or directly through the inner tube 1, depending on the health condition and the progress of the patient. The improvement measures based on the embodiment are as follows: the inside wall of outer tube 2 and the lateral wall clearance fit of inner tube 1, the position that is close to stationary blade 4 outside outer tube 2 is equipped with second humidifying pipe 12, second humidifying pipe 12 and outer tube 2 intercommunication, and second humidifying pipe 12 and first humidifying pipe 6 interval setting. Specifically, the first humidifying conduit 6 and the second humidifying conduit 12 are arranged along the axial direction of the outer sleeve 2 at intervals, or the first humidifying conduit 6 and the second humidifying conduit 12 are arranged along the circumferential direction of the outer sleeve 2 at intervals.

In order to facilitate the operation of the medical staff during the humidification using the first humidification catheter or the second humidification catheter, the other end of the second humidification catheter 12 facing away from the outer sleeve 2 is communicated with the first humidification catheter 6 through a three-way valve (not shown in the figure).

Preferably, first humidifying pipe 6 and second humidifying pipe 12 are the hose that the PVC material was made, and the tip that outer tube 2 was kept away from to first humidifying pipe 6 and second humidifying pipe 12 is equipped with the needle file interface, the needle file interface can link to each other with medical trachea dropping liquid device's connecting tube, is the screw socket formula between needle file interface and the connecting tube for example and connects. Furthermore, an infusion cap for sealing the needle seat interface is arranged on the needle seat interface so as to ensure the tightness of the needle seat interface under the condition of not using.

Preferably, the outer connecting hole 7 is a circular through hole, and the membrane valve plate 8 is installed in the outer connecting hole 7.

Preferably, the inner tube 1 is in a circular arc structure, and the outer sleeve 2 is also in a circular arc structure matched with the inner tube 1. The inner tube 1 and the outer sleeve 2 of the arc-shaped structure are matched with the trachea of a patient, the inner tube 1 and the outer sleeve 2 can be limited along the circumferential direction due to the arc-shaped structure, and therefore when the inner tube 1 is inserted into the outer sleeve 2, the inner connecting hole 9 in the inner tube 1 can be fine and corresponds to the outer connecting hole 7 in the outer sleeve 2.

Preferably, the limiting member 5 includes an annular shifting piece 5.1, the shifting piece 5.1 is attached to the upper end face of the fixing piece 4 and can only rotate in the circumferential direction, that is, the fixing piece 4 is provided with clamping blocks 4.1 which are uniformly distributed in the circumferential direction, and the outer edge of the shifting piece 5.1 is clamped with the clamping blocks, so that the shifting piece 5.1 is limited on the fixing piece 4 in the horizontal direction and the vertical direction and can only rotate in the circumferential direction. The outer side wall of the inner tube 1, which is located above the fixing piece 4, extends along the radial direction to form a flange 1.1, the flange 1.1 is attached to a shifting piece 5.1, and a locking piece 5.2 which is locked or unlocked along with the axial movement of the flange 1.1 along with the rotation of the shifting piece 5.1 is arranged between the shifting piece 5.1 and the edge of the flange 1.1. Specifically, the locking piece is the projection of L type, and the lower extreme and the plectrum 5.1 of locking piece are fixed, and the upper end of locking piece extends to on turn-ups 1.1, be equipped with on turn-ups 1.1 with this locking piece assorted breach 1.2.

The utility model provides a tracheostomy cannula assembly used during postoperative radiotherapy of head and neck tumors based on the embodiment of the tracheostomy cannula, which is characterized in that: the portable infusion pump comprises a portable infusion pump 200 and the tracheostomy cannula 100, wherein one end of a first humidifying conduit 6 in the tracheostomy cannula 100 is communicated with an external connecting hole 7 on an outer cannula 2, and the other end is communicated with an air supply port of the portable infusion pump 200. The portable infusion pump 20 can be directly hung on a patient, and the tracheostomy cannula 100 in the utility model can ensure that the first humidifying catheter is not easy to be separated, so that the patient can move freely in the process of humidifying the airway, can lie down and walk off the bed as will, and can move freely, thereby obviously improving the life quality in the hospitalization period.

Further, the portable infusion pump 200 may be a non-electrically driven single use portable infusion pump. The non-electrically driven disposable ambulatory infusion pump is a commercially available existing infusion pump, and therefore the structure thereof is not described in detail.

The use process of the utility model is as follows:

firstly, inserting a core tube 3 into an outer sleeve 2 for plugging a lower end pipe orifice of the outer sleeve 2, then installing the outer sleeve 2 with the core tube 3 on an air pipe of a patient, fixing the outer sleeve 2 on the patient through a fixing piece 4 on the outer sleeve 2, keeping the end part of a humidifying catheter on the outer sleeve 2 exposed at the moment, then drawing out the core tube, inserting an inner tube 1 matched with the outer sleeve 2 into the outer sleeve 2, at the moment, extending the lower end of the inner tube 1 into the outer sleeve 2, rotating a plectrum 5.1 to enable a locking piece 5.2 on the plectrum 5.1 to correspond to a notch 1.2 on a flanging 1.1 of the inner tube 1, thus enabling the flanging 1.1 on the inner tube 1 to be attached to the plectrum 5.1 fixed on the outer sleeve 2, and then rotating the plectrum 5.1 to enable the locking piece 5.2 to be far away from the notch 1.2 along the circumferential direction, thereby completing the installation of the inner tube 1; the installation of the present tracheostomy cannula assembly is completed by placing the air supply port hose fitting on the portable infusion pump 200 in communication with the humidifying catheter hub and allowing the portable infusion pump 200 to be strapped onto the patient. The humidifying catheter comprises a first humidifying catheter 6 and a second humidifying catheter 12, a medical worker can optionally select to use the first humidifying catheter 6 to be communicated with the portable infusion pump 200 or the second humidifying catheter 12 to be communicated with the portable infusion pump 200, the two humidifying catheters 6 can be identified by the medical worker conveniently, and the first humidifying catheter 6 and the second humidifying catheter 12 can be set to have different lengths and can be distinguished or can be distinguished by labels with different colors.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Various alterations and modifications will no doubt become apparent to those skilled in the art after having read the above description. Therefore, the appended claims should be construed to cover all such variations and modifications as fall within the true spirit and scope of the utility model. Any and all equivalent ranges and contents within the scope of the claims should be considered to be within the intent and scope of the present invention.

Claims (9)

1. The utility model provides a autogenous cutting sleeve pipe for during radiotherapy after neck tumour art, it includes inner tube (1) and cover outer tube (2) outside inner tube (1), the upper end of inner tube (1) is exposed outside outer tube (2), the upper end of outer tube (2) is equipped with stationary blade (4), be equipped with on stationary blade (4) and be used for restricting locating part (5) of inner tube (1) and outer tube (2) relative motion, its characterized in that: a first humidifying conduit (6) is arranged at a position, close to the fixing piece (4), outside the outer sleeve (2), one end of the first humidifying conduit (6) is communicated with an outer connecting hole (7) in the outer sleeve (2), and a switch valve is arranged in the inner or outer connecting hole (7) of the first humidifying conduit (6).

2. The tracheostomy cannula according to claim 1 for use during post-operative radiotherapy of head and neck tumors, characterized in that: the switch valve comprises a film valve plate (8), the film valve plate (8) is installed in the outer connecting hole (7), an opening (8.1) is formed in the film valve plate (8), and the film valve plate (8) responds to the pressure difference between the two sides of the film valve plate (8) to enable the opening (8.1) to be pressed to be opened or reset to be closed.

3. The tracheostomy cannula according to claim 1 for use during post-operative radiotherapy of head and neck tumors, characterized in that: the inner pipe (1) is provided with an inner connecting hole (9) at a position corresponding to the outer connecting hole (7), the inner connecting hole (9) is communicated with the outer connecting hole (7), and the inner connecting hole (9) is covered with a filter screen (10).

4. The tracheostomy cannula according to claim 3 for use during post-operative radiotherapy of a head and neck tumor, characterized in that: the filter screen (10) is an arc-shaped filter screen (10) which is concave towards the position of the central axis of the inner pipe (1).

5. The tracheostomy cannula according to claim 4 for use during post-operative radiotherapy of head and neck tumors, characterized in that: be equipped with elasticity ring cover (11) between outer connecting hole (7) and inner connecting hole (9), the one end of elasticity ring cover (11) and the inside wall of outer tube (2) or the lateral wall fixed connection of inner tube (1), the other end of elasticity ring cover (11) and the lateral wall of inner tube (1) or the inside wall of outer tube (2) offset and lean on, outer connecting hole (7) on outer tube (2) are through elasticity ring cover (11) and inner connecting hole (9) intercommunication.

6. The tracheostomy cannula according to claim 5 for use during post-operative radiotherapy of a head and neck tumor, characterized in that: the inside wall of outer tube (2) and the lateral wall clearance fit of inner tube (1), the position that is close to stationary blade (4) outside outer tube (2) is equipped with second humidifying pipe (12), second humidifying pipe (12) and outer tube (2) intercommunication, and second humidifying pipe (12) and first humidifying pipe (6) interval set up.

7. The tracheostomy cannula according to claim 6 for use during post-operative radiotherapy of head and neck tumors, characterized in that: the other end of the second humidifying conduit (12) departing from the outer sleeve (2) is communicated with the first humidifying conduit (6) through a three-way valve.

8. The tracheostomy cannula according to any one of claims 1 to 7 for use during post-operative radiotherapy of head and neck tumours, characterized in that: the inner tube (1) is of a circular arc-shaped structure, and the outer sleeve (2) is matched with the inner tube (1).

9. A tracheostomy cannula assembly for use during postsurgical radiotherapy of a head and neck neoplasm, comprising: it comprises a portable infusion pump (200) and an tracheostomy cannula (100) according to any of the previous claims 1 to 8, said tracheostomy cannula (100) having a first humidifying conduit (6) communicating at one end with an external connection opening (7) in the external cannula (2) and at the other end with an air supply opening of the portable infusion pump (200).

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