Tracheal catheter capable of monitoring air bag pressure

Abstract

The utility model relates to a tracheal catheter capable of monitoring air bag pressure, which comprises an air guide tube, an air bag sleeved outside the air guide tube, an inflation tube used for inflating and deflating the air bag and a pressure measuring device capable of monitoring the air bag pressure, and the pressure measuring device comprises a pressure indicating bag arranged outside the air bag and a liquid storage bag sleeved outside the pressure indicating bag. The pressure indication bag is communicated with the air bag through an inflation tube, and indication liquid used for displaying expansion and contraction changes of the pressure indication bag is arranged in the liquid storage bag. After the technical scheme is adopted, the liquid storage bag is arranged outside the air bag, the liquid storage bag is located outside the human body during use, safety is higher, risks caused by accidental leakage are avoided, the pressure indicating bag and the liquid storage bag are used for monitoring the pressure change of the air bag, simplicity and intuition are achieved, and even if the pressure change is small, the liquid storage bag can not be used. The liquid level sensor has the advantage of being convenient to monitor.

Description

Technical Field

[0001] This utility model relates to an endotracheal tube capable of monitoring airbag pressure. Background Technology

[0002] Most critically ill patients in the ICU require endotracheal intubation for airway protection. A crucial aspect of caring for intubated patients is monitoring the cuff pressure. This monitoring is essential for proper cuff placement to prevent dislodgement; for airway closure to prevent air leakage; and for preventing aspiration and reducing the risk of lung infection.

[0003] Currently, methods for monitoring cuff pressure include the cuff manometer method, the pinch-feel method, and the minimum closure technique. The cuff manometer method is the most commonly used clinical choice due to its reliability, accuracy, and ease of operation. However, the cuff manometer method still has some drawbacks. For example, when the cuff manometer's connector is connected to the exposed pressure indicator cuff in the trachea, deflation occurs, leading to significant errors in the measured data, and it also requires reliance on a manometer.

[0004] Chinese utility model patent CN213526962U, entitled "An Automatically Monitorable Cuff Pressure Tracheal Tube," discloses an automatically monitorable cuff pressure tracheal tube. The tube includes an air tube, a cuff fitted over the air tube, and an inflation tube attached to the outside of the air tube for inflating and deflating the cuff. The tracheal tube also includes a pressure measuring device for automatically monitoring cuff pressure. This device includes a pressure-indicating line attached to the outside of the air tube and a reservoir inside the cuff. The reservoir is connected to the pressure-indicating line and contains liquid. Pressure scale lines are provided on the pressure-indicating line. While this patented tracheal tube can achieve real-time dynamic monitoring of cuff pressure, the reservoir is located inside the cuff. Leakage could cause significant harm to the patient. Furthermore, low pressure levels are not easily visible, affecting the accuracy of the monitoring.

[0005] Based on the above issues, the applicant conducted research on these issues and thus this case came into being. Utility Model Content

[0006] The purpose of this invention is to provide a tracheal tube that is safer and easier to monitor.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An airway tube for monitoring airbag pressure includes an air tube, an airbag fitted outside the air tube, an inflation tube for inflating and deflating the airbag, and a pressure measuring device for monitoring airbag pressure. The pressure measuring device includes a pressure indicator bladder located outside the airbag and a reservoir bag fitted outside the pressure indicator bladder. The pressure indicator bladder is connected to the airbag via the inflation tube, and the reservoir bag contains an indicator liquid for displaying the expansion and contraction changes of the pressure indicator bladder.

[0009] In a preferred embodiment of the present invention, the liquid storage bag includes a bladder portion and a tube portion that are interconnected, the bladder portion wrapping around the pressure indicator bladder and the tube portion sleeved around the inflation tube.

[0010] In a preferred embodiment of the present invention, the inflation tube includes a first tube body and a second tube body. The first tube body is disposed between the second tube body and the pressure indicator bladder, and the second tube body is attached to the outer wall of the air guide tube. The first tube body is separately disposed from the outer side of the air guide tube.

[0011] In a preferred embodiment of this utility model, the tube body is sleeved outside the first tube body.

[0012] In a preferred embodiment of this invention, the indicator liquid is methylene blue.

[0013] As a preferred embodiment of this utility model, the pressure indicator bladder is provided with an inflation check valve.

[0014] As a preferred embodiment of this utility model, the air guide tube is provided with a first scale.

[0015] As a preferred embodiment of this utility model, the first tube body is provided with a second scale.

[0016] In a preferred embodiment of this invention, the capsule portion is ellipsoidal.

[0017] In a preferred embodiment of this invention, the pressure indicator bladder is made of a flexible material, the hardness of the liquid storage bag is greater than that of the pressure indicator bladder, and the volume of the indicator liquid is smaller than that of the liquid storage bag.

[0018] By adopting the technical solution of this utility model, the liquid storage bag is placed outside the airbag. During use, the liquid storage bag is located outside the human body, which is safer and avoids the risk of accidental leakage. This utility model monitors the pressure change of the airbag through the pressure indicator bag and the liquid storage bag. It is simple and intuitive. Even if the pressure change is small, it can be reflected by the change of the indicator liquid. It has the advantage of convenient monitoring. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] In the picture:

[0021] Air tube 10 First graduation 11

[0022] 20 airbags, 30 inflation tubes

[0023] First tube body 31 Second tube body 32

[0024] Second graduation 33, reservoir bag 40

[0025] Balloon body part 41 Tube body part 42

[0026] Pressure indicator bladder 50, one-way valve 60

[0027] Indicator liquid 70 Detailed Implementation

[0028] To better understand the technical solution of this utility model, the following description is provided in more detail with reference to the embodiments.

[0029] Reference Figure 1 The endotracheal tube that can monitor the airbag pressure includes an air tube 10, an airbag 20 sleeved outside the air tube 10, an inflation tube 30 for inflating and deflating the airbag 20, and a pressure measuring device that can monitor the pressure of the airbag 20. When in use, the air tube 10 and the airbag 20 are inserted into the human respiratory trachea to achieve the positioning of the entire device.

[0030] The pressure measuring device described in this utility model includes a pressure indicator bladder 50 disposed outside the airbag 20 and a liquid storage bag 40 sleeved outside the pressure indicator bladder 50. The pressure indicator bladder 50 is connected to the airbag 20 through an inflation tube 30. The pressure of the pressure indicator bladder 50 is the same as that of the airbag 20. The pressure of the airbag 20 is displayed through the pressure indicator bladder 50. The liquid storage bag 40 is provided with an indicator liquid 70 for displaying the expansion and contraction changes of the pressure indicator bladder 50. When the pressure indicator bladder 50 expands, the liquid storage bag 40 is compressed accordingly, and the liquid level of the indicator liquid changes. When the pressure indicator bladder 50 contracts, the liquid level of the liquid storage bag 40 changes accordingly.

[0031] In a preferred embodiment of this invention, the liquid storage bag 40 includes a bladder portion 41 and a tube portion 42 that are interconnected. The bladder portion 41 wraps around the pressure indicator bladder 50, forming a space between the bladder portion 41 and the pressure indicator bladder 50 for receiving the pressure indicator bladder 50. The tube portion 42 is fitted over the inflation tube 30. Thus, when the pressure of the airbag 20 changes, the pressure indicator bladder 50 changes accordingly, manifested as the pressure indicator bladder 50 expanding or contracting. The indicator liquid 70 in the bladder portion 41 is squeezed into the tube portion 42 or flows back from the tube portion 42 to the bladder portion 41. By observing the changes in the indicator liquid 70 in the bladder portion 41, the pressure change of the airbag 20 can be determined.

[0032] In a preferred embodiment of the present invention, the inflation tube 30 includes a first tube body 31 and a second tube body 32. The first tube body 31 is disposed between the second tube body 32 and the pressure indicator bladder 50. The second tube body 32 is attached to the outer wall of the air guide tube 10 and can be fixed on the air guide tube 10. The first tube body 31 is separated from the outer side of the air guide tube 10. In use, the first tube body 31 is located outside the human body.

[0033] In a preferred embodiment of this invention, the tube body 42 is sleeved outside the first tube body 31. In a preferred embodiment of this invention, the indicator liquid 70 is methylene blue, which is edible methylene blue, to prevent agitated patients from biting off the capsule body 41 and accidentally ingesting it.

[0034] As a preferred embodiment of this utility model, the pressure indicator bladder 50 is provided with an inflation check valve 60, through which gas of a certain pressure can be injected into the airbag 20 to prevent air leakage.

[0035] In a preferred embodiment of this invention, the air guide tube 10 is provided with a first scale 11 to monitor the insertion depth of the air guide tube 10. In a preferred embodiment of this invention, the first tube body 31 is provided with a second scale 33 to monitor the variation range of the indicator liquid 70. The optimal range of the indicator liquid 70 can be indicated by setting a conspicuous mark at the scale line position.

[0036] In a preferred embodiment of the present invention, the bladder body 41 is ellipsoidal. In another preferred embodiment, the pressure indicator bladder 50 is made of a flexible material, the hardness of the bladder body 41 is greater than the hardness of the pressure indicator bladder 50, and the volume of the indicator liquid 70 is smaller than the volume of the storage bag 40; for example, the volume of the indicator liquid 70 is one-half to two-thirds of the volume of the storage bag 40.

[0037] This invention utilizes the principle of mercury pressure measurement. When air is pumped from the air bladder 20, as the pressure increases, the indicator liquid 70 in the reservoir 40 is squeezed out. The indicator liquid 70 moves upward with the rising pressure of the air bladder 20 until it reaches the optimal range indication area, at which point pumping can be stopped. If the pressure of the air bladder 20 drops, the indicator liquid 70 drops accordingly, falling below the optimal range. At this point, air can be pumped in again until the indicator liquid 70 returns to the optimal range.

[0038] Of course, the scope of protection of this utility model is not limited to this embodiment. Any similar changes made to it can be considered as not departing from the patent protection scope of this utility model.

Claims

1. An endotracheal tube for monitoring airbag pressure, comprising an air tube, an airbag sleeved outside the air tube, an inflation tube for inflating and deflating the airbag, and a pressure measuring device for monitoring airbag pressure, characterized in that: The pressure measuring device includes a pressure indicator bladder disposed outside the air bladder and a liquid storage bag sleeved outside the pressure indicator bladder. The pressure indicator bladder is connected to the air bladder through an inflation tube, and the liquid storage bag contains an indicator liquid for displaying the expansion and contraction changes of the pressure indicator bladder.

2. The endotracheal tube capable of monitoring cuff pressure as described in claim 1, characterized in that: The liquid storage bag includes a bladder portion and a tube portion that are interconnected. The bladder portion is wrapped around the pressure indicator bladder, and the tube portion is fitted over the inflation tube.

3. The endotracheal tube capable of monitoring cuff pressure as described in claim 2, characterized in that: The inflation tube includes a first tube and a second tube. The first tube is disposed between the second tube and the pressure indicator bladder. The second tube is attached to the outer wall of the air guide tube. The first tube is separated from the outer side of the air guide tube.

4. The endotracheal tube for monitoring cuff pressure as described in claim 3, characterized in that: The tube body is fitted over the first tube body.

5. The endotracheal tube for monitoring cuff pressure as described in claim 4, characterized in that: The indicator solution is methylene blue.

6. The endotracheal tube for monitoring cuff pressure as described in claim 5, characterized in that: The pressure indicator bladder is equipped with an inflation check valve.

7. The endotracheal tube for monitoring cuff pressure as described in claim 6, characterized in that: The air duct has a first graduation.

8. The endotracheal tube for monitoring cuff pressure as described in claim 7, characterized in that: The first tube has a second scale.

9. The endotracheal tube for monitoring cuff pressure as described in claim 8, characterized in that: The capsule portion is ellipsoidal.

10. The endotracheal tube for monitoring cuff pressure as described in claim 9, characterized in that: The pressure indicator bladder is made of a flexible material, the hardness of the liquid storage bag is greater than that of the pressure indicator bladder, and the volume of the indicator liquid is smaller than that of the liquid storage bag.

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