Trachea cannula capable of automatically relieving pressure

Abstract

The utility model provides a trachea cannula capable of automatically relieving pressure. The trachea cannula comprises a cuff and a pressure relief pipeline which are communicated with each other, a pressure relief pipe body is arranged on the pressure relief pipeline, an elastic diaphragm is arranged in the pressure relief pipe body, the pressure relief pipe body is divided into a first cavity and a second cavity by the elastic diaphragm, the second cavity is communicated with the cuff through an air inlet hole, an air leakage hole is formed in the second cavity, and when the air pressure in the second cavity does not exceed the maximum limited air pressure, the air leakage hole is in a closed state; when the air pressure in the second cavity exceeds the maximum limited air pressure, the air leakage hole is in an open state; a piston is installed in the first cavity in a sliding mode, the piston is fixedly connected with the elastic diaphragm, a visual window is arranged on the first cavity, scale marks are arranged on the visual window, when the air pressure in the second cavity is increased / decreased, the elastic diaphragm expands / contracts and drives the piston to slide, and the air pressure of the cuff is read through the position, at the scale marks, of the piston. The device can prevent the pressure of the cuff from being insufficient or too high, so that the pressure of the cuff is kept within a safe range.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, and particularly relates to a tracheal cannula with automatic pressure relief. BACKGROUND

[0002] The tracheal cannula is an auxiliary ventilation measure for general anesthesia and plays a vital role in general anesthesia, which not only ensures the smoothness of the respiratory tract of a patient, but also can seal the respiratory tract by a cuff on the tracheal cannula to avoid the reflux of gastric contents into the trachea and lungs. The cuff pressure is an important influencing factor of ventilation, when the cuff pressure is insufficient, air leakage occurs in the airway, and even causes regurgitation and aspiration, when the cuff pressure is too high, it is easy to cause damage to the tracheal mucosa, thereby causing a series of respiratory complications.

[0003] According to clinical experience, the cuff pressure is most suitable when it is 25-30cmH2O, the pressure range will not cause mucosal damage, nor will it cause the aspiration of secretions or gastric contents into the lungs. However, medical personnel usually operate by experience when inflating the cuff, whether the cuff pressure on the tracheal mucosa is appropriate cannot be directly judged, and it often leads to high cuff pressure and damage to the tracheal mucosa, causing ischemia, necrosis, even causing tracheal stenosis or perforation, or low cuff pressure and airway leakage.

[0004] Based on this, the utility model provides a tracheal cannula with automatic pressure relief to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at the shortage of prior art, and provides a tracheal cannula with automatic pressure relief, which can timely find out when the cuff pressure is insufficient, and can avoid high cuff pressure and damage to the tracheal mucosa.

[0006] In order to realize the above technical purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a kind of automatic pressure relief tracheal tube, the tracheal tube includes mutual communication cuff and pressure relief pipeline;Pressure relief pipeline is provided with pressure relief device, the pressure relief device includes pressure relief pipe body, and pressure relief pipe body is provided with elastic diaphragm, and elastic diaphragm is fixedly connected with the inner wall of pressure relief pipe body, and pressure relief pipe body is divided into first cavity and second cavity;The second cavity is communicated with the cuff by air inlet hole, and the second cavity is provided with air vent, when the air pressure in the second cavity does not exceed maximum limit air pressure, air vent is closed state, when the air pressure in the second cavity exceeds maximum limit air pressure, air vent is open state;Piston is slidably installed in the first cavity, and piston is fixedly connected with elastic diaphragm, when the air pressure in the second cavity increases / decreases, elastic diaphragm expands / contracts and drives piston to slide;First cavity is provided with visual window, and scale line for indicating air pressure is provided on visual window, and the air pressure of cuff is read by the position of piston on scale line.

[0008] Further, the air vent is installed with air vent assembly; the air vent assembly includes air vent pipe, spring, gasket and plug; one end of the air vent pipe is fixedly connected with the outer wall of the second cavity, the other end of the air vent pipe is fixedly connected with the plug, and the plug is provided with air outlet hole; the spring and the gasket are arranged in the air vent pipe, one end of the spring is connected with the inner wall of the plug, the other end is connected with the gasket, when the air pressure in the second cavity exceeds the maximum limit air pressure, the gasket is separated from the air vent, when the air pressure in the second cavity does not exceed the maximum limit air pressure, the gasket is sealedly connected with the air vent under the action of the spring.

[0009] Further, a gap is provided between the gasket and the air vent pipe.

[0010] Further, the plug is provided with external thread, and the air vent pipe is provided with internal thread matched with the external thread, and the plug is threadedly and sealingly connected with the air vent pipe.

[0011] Further, the piston is fixedly connected with the center of the elastic diaphragm.

[0012] Further, a connecting block is fixedly arranged at the center of the elastic diaphragm, and a connecting body is arranged on the side of the piston facing the elastic diaphragm, and the connecting body is distributed at the center position of the piston; a groove matched with the connecting block is formed in the connecting body, and the connecting block is fixedly installed in the groove.

[0013] Further, the tracheal tube further includes pipe body and inflation pipeline; the cuff is fixed on the outer surface of the pipe body, and the inflation pipeline is communicated with the cuff, and the inflation pipeline is provided with inflation interface.

[0014] Further, a connecting pipe is further provided, one end of the connecting pipe is communicated with the cuff, and the other end is respectively communicated with the inflation pipeline and the pressure relief pipeline.

[0015] The utility model discloses the beneficial effect of:

[0016] (1) the utility model discloses first cavity is provided with visual window, piston and scale line, can through the indication of piston and scale line real -time observation to the gas pressure in the sleeve bag, in order to when the gas pressure in the sleeve bag is insufficient, timely discovery and carry out inflation, can prevent sleeve bag pressure to be too low and lead to air passage air leakage;

[0017] (2) the utility model discloses through setting up the release of gas component and realizes the closure and opening of the air release hole, when the gas pressure in the sleeve bag exceeds the maximum limited gas pressure, can automatically release the excess gas, prevents sleeve bag pressure to be too high and damages the mucous membrane of tracheal inner wall, thereby make the gas pressure in the sleeve bag always keep in the proper range;

[0018] (3) the utility model discloses adjusting plug structure is used for adjusting the compression amount of spring, thereby setting different pressure relief value;

[0019] (4) the utility model discloses can realize single inflation and pressure control synchronous completion, need not external other pressure control device, avoided the adverse effect due to the gas pressure in the sleeve bag is too high or too low, guaranteed the treatment effect of patient after tracheal tube intubation. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is the tracheal tube structure schematic diagram of the utility model embodiment;

[0021] Fig. 2 It is the pressure relief area and pressure indication area schematic diagram of the utility model embodiment;

[0022] Fig. 3 It is the inside structure schematic diagram of the pressure relief pipe body of the utility model embodiment;

[0023] The mark in the drawing is:

[0024] 1, pipe body;2, sleeve bag;3, connecting pipe;4, inflation pipeline;5, pressure relief pipeline;6, inflation interface;7, pressure relief pipe body;7a, scale line;7b, air hole;7c, plug;7d, spring;7e, sealing pad;7f, air release hole;7g, air inlet;7h, elastic diaphragm;7i, piston;Ⅰ, pressure relief area;Ⅱ, pressure indication area. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] Embodiment 1

[0027] The utility model embodiments provide a kind of tracheal tube of automatic pressure relief, and the tracheal tube establishes temporary artificial respiration passage for patient.

[0028] With reference to Figs. 1-3 , the tracheal tube includes tube body 1, cuff 2, connecting pipe 3, inflation pipeline 4 and pressure relief pipeline 5, cuff 2 is fixed on the outer surface of tube body 1, connecting pipe 3 one end is communicated with cuff 2, other end is communicated with inflation pipeline 4 and pressure relief pipeline 5 respectively, inflation pipeline 4 is provided with inflation interface 6, inflation interface 6 includes one-way valve and indicating air bag.

[0029] With reference to Fig. 1 And 3 , the pressure relief pipeline 5 is provided with pressure relief device, and the pressure relief device includes pressure relief tube body 7, which is communicated with the pressure relief pipeline 5. The pressure relief tube body 7 is provided with an elastic diaphragm 7h, which is fixedly connected with the inner wall of the pressure relief tube body 7, so as to divide the pressure relief tube body 7 into a first cavity and a second cavity. When the cuff 2 is not inflated, the elastic diaphragm 7h is in a flat state, and after the cuff 2 is inflated, the elastic diaphragm 7h is deformed convexly. If the air pressure in the cuff 2 decreases, the elastic diaphragm 7h will shrink accordingly. The second cavity is communicated with the pressure relief pipeline 5 and the cuff 2 through the air inlet hole 7g, and the second cavity is provided with an air outlet hole 7f. When the air pressure in the second cavity does not exceed the maximum limited air pressure, the air outlet hole 7f is in a closed state, and when the air pressure in the second cavity exceeds the maximum limited air pressure, the air outlet hole 7f is in an open state.

[0030] In the embodiment, a piston 7i is slidably installed in the first cavity, and the piston 7i is fixedly connected with the elastic diaphragm 7h. When the air pressure in the second cavity increases / decreases, the elastic diaphragm 7h expands / contracts and drives the piston 7i to slide. The first cavity is provided with a viewing window, as shown in Fig. 3 , the viewing window is provided with a scale line 7a for indicating air pressure, and the moving range of the piston 7i is not less than the range of the scale line 7a. The air pressure value is read by the position of the piston on the scale line 7a, so as to monitor the air pressure in the cuff 2 in real time.

[0031] In other embodiments of the utility model, blocking piece can be arranged on the side of piston 7i far from elastic diaphragm 7h, and the blocking piece is arranged at the scale line of maximum limited air pressure.

[0032] The application principle of the device is as follows:

[0033] When the device is applied, medical staff inflates the cuff 2 through the inflation interface 6 on the inflation pipeline 4, and the inflation pipeline 4, the cuff 2 and the pressure relief pipeline 5 are in communication and have the same air pressure. When the inflation is started, the air pressure in the cuff 2 gradually increases, the air pressure in the pressure relief pipeline 5 increases, the air pressure in the second cavity of the pressure relief pipeline body 7 increases, the elastic diaphragm 7h expands and drives the piston 7i to slide towards the direction away from the second cavity (the friction force between the piston 7i and the inner wall of the first cavity is smaller than the thrust of the elastic diaphragm 7h), and at this time, the air vent 7f is in a closed state. When the inflation is excessive or the patient's body position changes to cause the air pressure in the second cavity to increase and exceed the maximum limited air pressure, the air vent 7f is opened to automatically release air until the air pressure in the second cavity does not exceed the maximum limited air pressure, and the air vent 7f returns to the closed state. When the air pressure in the second cavity decreases and is lower than the safety air pressure, the elastic diaphragm 7h contracts and drives the piston 7i to slide towards the direction close to the second cavity, and the medical staff can read the air pressure value in real time through the air pressure scale line 7a on the outer wall of the pressure indication area II cavity, and the air pressure in the cuff 2 can be inflated in time when the air pressure in the cuff 2 is insufficient.

[0034] The utility model can observe the air pressure in the cuff 2 in real time through the indication of the piston 7i and the scale line, can find in time and inflate when the air pressure in the cuff 2 is insufficient, prevents the airway from leaking due to the cuff pressure being too low, and can automatically release air when the air pressure in the cuff 2 exceeds the maximum limited air pressure, prevents the tracheal mucosa from being damaged due to the cuff pressure being too high, and can keep the air pressure in the cuff 2 in a suitable range at all times.

[0035] Embodiment 2

[0036] The main body structure of the embodiment is the same as that of embodiment 1, and the difference is that a gas release assembly is installed at the air vent 7f in the embodiment, and the air vent 7f is closed and opened through the gas release assembly.

[0037] Specifically, refer to Fig. 3In the embodiment, the air release assembly comprises an air release pipe, a spring 7d, a sealing gasket 7e and a plug 7c. One end of the air release pipe is fixedly connected to the outer wall of the second cavity, and the other end of the air release pipe is fixedly connected to the plug 7c, and the plug 7c is provided with an air outlet hole 7b. The spring 7d and the sealing gasket 7e are arranged in the air release pipe, one end of the spring 7d is connected to the inner wall of the plug 7c, the other end of the spring 7d is connected to the sealing gasket 7e, and a gap is arranged between the sealing gasket 7e and the air release pipe (the gap is set to 0.1 mm, so as to reduce the friction generated by contact and constrain the deformation path of the spring, so that the spring remains axial deformation). When the air pressure in the second cavity exceeds the maximum limited air pressure, the sealing gasket 7e blocking the air release hole 7f is subjected to a gas pressure greater than the predetermined pressure of the spring 7d, the sealing gasket 7e is separated from the air release hole 7f, and the gas in the cuff 2 is discharged to the outside through the connecting pipe 3, the pressure relief pipeline 5, the pressure relief pipe body 7, the air release hole 7f and the air outlet hole 7b, thereby realizing automatic pressure relief. When the air pressure in the second cavity does not exceed the maximum limited air pressure, the force of the air pressure pushing the sealing gasket 7e is equal to the elastic force of the spring 7d, and the sealing gasket 7e moves towards the air release hole 7f under the action of the spring 7d and is in sealing connection with the air release hole 7f.

[0038] In the embodiment, the plug 7c is provided with external threads, the air release pipe is provided with internal threads matched with the external threads, and the plug 7c is in threaded sealing connection with the air release pipe. The distance of the plug 7c extending into the air release pipe can be adjusted by screwing, and thus the compression amount of the spring 7d can be adjusted, so that the device is applicable to different air pressure requirements.

[0039] Embodiment 3

[0040] The main structure of the embodiment is the same as that of Embodiment 2, and the difference lies in that the connection mode of the piston 7i and the elastic diaphragm 7h is limited in the embodiment.

[0041] Specifically, referring to Fig. 3 In the embodiment, the piston 7i is fixedly connected to the center of the elastic diaphragm 7h. A connecting block is fixedly arranged at the center of the elastic diaphragm 7h, and a connecting body is arranged on the side of the piston 7i facing the elastic diaphragm 7h, and the connecting body is distributed at the center of the piston 7i. A groove matched with the connecting block is formed in the connecting body, and the connecting block is fixedly installed in the groove.

[0042] The preferred embodiments of the utility model are only above, the protection scope of the utility model is not only limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the utility model are within the protection scope of the utility model, and it should be pointed out that some improvements and decorations without departing from the principle of the utility model for the ordinary skilled in the art are regarded as the protection scope of the utility model.

Claims

1. An automatic pressure relief tracheal cannula, characterized in that, the tracheal cannula comprises a cuff (2) and a pressure relief pipeline (5) in communication with each other; the pressure relief pipeline (5) is provided with a pressure relief device, the pressure relief device comprises a pressure relief pipe body (7), an elastic diaphragm (7h) is arranged in the pressure relief pipe body (7), the elastic diaphragm (7h) is fixedly connected with the inner wall of the pressure relief pipe body (7), and the pressure relief pipe body (7) is divided into a first cavity and a second cavity; the second cavity is in communication with the cuff (2) through an air inlet hole (7g), and the second cavity is provided with an air outlet hole (7f); when the air pressure in the second cavity does not exceed the maximum limited air pressure, the air outlet hole (7f) is in a closed state; when the air pressure in the second cavity exceeds the maximum limited air pressure, the air outlet hole (7f) is in an open state; a piston (7i) is slidably arranged in the first cavity, the piston (7i) is fixedly connected with the elastic diaphragm (7h), and when the air pressure in the second cavity increases / decreases, the elastic diaphragm (7h) expands / contracts and drives the piston (7i) to slide; the first cavity is provided with a visible window, a scale line (7a) for indicating air pressure is arranged on the visible window, and the cuff air pressure is read by the position of the piston on the scale line (7a).

2. The automatic pressure relief tracheal cannula according to claim 1, characterized in that, an air outlet assembly is arranged at the air outlet hole (7f); the air outlet assembly comprises an air outlet pipe, a spring (7d), a sealing gasket (7e) and a plug (7c); one end of the air outlet pipe is fixedly connected with the outer wall of the second cavity, the other end of the air outlet pipe is fixedly connected with the plug (7c), and the plug (7c) is provided with an air outlet hole (7b); the spring (7d) and the sealing gasket (7e) are arranged in the air outlet pipe, one end of the spring (7d) is connected with the inner wall of the plug (7c), and the other end is connected with the sealing gasket (7e), when the air pressure in the second cavity exceeds the maximum limited air pressure, the sealing gasket (7e) is separated from the air outlet hole (7f); when the air pressure in the second cavity does not exceed the maximum limited air pressure, the sealing gasket (7e) is sealingly connected with the air outlet hole (7f) under the action of the spring (7d).

3. The automatic pressure relief tracheal cannula according to claim 2, characterized in that, a gap is arranged between the sealing gasket (7e) and the air outlet pipe.

4. The automatic pressure relief tracheal cannula according to claim 2, characterized in that, the plug (7c) is provided with external threads, the air outlet pipe is provided with internal threads matched with the external threads, and the plug (7c) is threadedly and sealingly connected with the air outlet pipe.

5. The automatic pressure relief tracheal cannula according to claim 1, characterized in that, the piston (7i) is fixedly connected with the center of the elastic diaphragm (7h).

6. The automatic pressure relief tracheal cannula according to claim 5, characterized in that, a connecting block is fixedly arranged at the center of the elastic diaphragm (7h), and a connecting body is arranged on the side of the piston (7i) facing the elastic diaphragm (7h), and the connecting body is distributed at the central position of the piston (7i); a groove matched with the connecting block is formed in the connecting body, and the connecting block is fixedly arranged in the groove.

7. The self-deflating tracheal cannula according to claim 1, wherein, the tracheal cannula further comprises a tube body (1) and an inflation conduit (4); the cuff (2) is fixed on the outer surface of the tube body (1), the inflation conduit (4) is in communication with the cuff (2), and the inflation conduit (4) is provided with an inflation port (6).

8. The self-deflating tracheal cannula according to claim 7, wherein, a connecting tube (3) is further provided, one end of the connecting tube (3) is in communication with the cuff (2), and the other end of the connecting tube (3) is in communication with the inflation conduit (4) and the pressure relief conduit (5) respectively.

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