Airway opening pressure measuring device

Abstract

The airway opening pressure measuring device comprises a breathing machine communicating pipe, a three-way pipe, a pressure measuring end pipe and an artificial airway fixator, the breathing machine communicating pipe is communicated with the pressure measuring end pipe through the three-way pipe, and the third opening end, different from the breathing machine communicating pipe and the pressure measuring end pipe, of the three-way pipe is a pressure zero calibration opening. The artificial airway fixator is clamped with an artificial airway outer opening and the pressure measuring end tube, and one end, deviating from the three-way tube, of the pressure measuring end tube extends into the artificial airway of the patient for pressure measurement; tracheotomy model number scales and trachea cannula model number scales are arranged on the pressure measuring end tube, the tracheotomy model number scales correspond to the tip opening in the lower trachea of the model number, and the trachea cannula model number scales correspond to the tip opening in the cannula of the model number. The respiratory effort is measured by using the synchronism and correlation of the fluctuation of the tip pressure in the artificial airway and the fluctuation of the pressure in the esophagus, the design and operation are simple, the cost of product materials and consumables is low, the maintenance and cleaning are simple, the labor cost is low, and the popularization is convenient.

Description

Technical Field

[0001] The invention relates to an airway opening pressure measuring device, belonging to the technical field of medical equipment. Background Art

[0002] In 1949, Buytendijk first demonstrated that esophageal pressure (Pes) could be used to replace intrathoracic pressure (Ppl). In 1952, Dornhorst and Leathart demonstrated that the changes in Ppl and Pes were similar and helpful in understanding respiratory mechanics. The esophageal pressure fluctuation (ΔPes) reflects the average PL during spontaneous breathing, and it is also confirmed that Pes can estimate the magnitude of inspiratory effort.

[0003] Currently, the size of the patient's respiratory effort is measured by placing a gastric tube with a balloon pressure measurement system in the esophagus to obtain the pressure value, thereby estimating the change in intrathoracic pressure. The disadvantage of this method is that the patient must be monitored by inserting such a balloon-mounted gastric tube, which is cumbersome to operate, expensive, difficult to maintain and clean, and the transpulmonary pressure can only be converted by formula when the ventilator is operating.

[0004] With the refinement of our monitoring of respiratory mechanics, we have found that during the weaning test or formal weaning process in patients with endotracheal intubation or tracheotomy, we can monitor the pressure at the tip of the artificial airway to indicate the patient's respiratory effort at this time. In clinical practice, we found that the fluctuation of the pressure at the tip of the artificial airway is well synchronized and correlated with the pressure fluctuation in the esophagus. Therefore, we hope that this type of device can directly monitor the pressure at the tip of the airway of patients with endotracheal intubation or tracheotomy, so as to reflect the size of the respiratory drive of patients with endotracheal intubation or tracheotomy in the offline state, and provide certain clinical diagnosis and treatment guidance value. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the existing respiratory effort-driven size monitoring can only be monitored by inserting a gastric tube with an air bag, which is cumbersome to operate, high in cost, difficult to maintain and clean, and can only be converted into transpulmonary pressure by formula when the ventilator is operating.

[0006] In order to solve the above technical problems, the present invention provides an airway opening pressure measuring device, which can be used to directly measure the pressure at the internal opening of an artificial airway (endotracheal intubation and tracheotomy), and can provide certain clinical reference values ​​during the patient's inhalation and exhalation stages.

[0007] In order to achieve the above technical objectives and the above technical effects, this application is implemented through the following technical solutions:

[0008] A device for measuring pressure at the airway opening comprises a ventilator connecting tube, a three-way tube, a pressure measuring end tube and an artificial airway fixer, wherein the ventilator connecting tube and the pressure measuring end tube are connected via the three-way tube, the third end of the three-way tube being different from the ventilator connecting tube and the pressure measuring end tube is a pressure zeroing port, a three-way switch knob is provided on the three-way tube, the artificial airway fixer clamps the artificial airway outer opening and the pressure measuring end tube, and the end of the pressure measuring end tube facing away from the three-way tube extends into the interior of the patient's artificial airway for pressure measurement.

[0009] Preferably, the ventilator connecting tube is connected to the inlet of the three-way tube, the pressure measuring end tube is connected to the outlet of the three-way tube, and the pressure zeroing port is the middle interface of the three-way tube.

[0010] Preferably, the pressure measuring end tube is a pressure measuring tube, and two layers of scale lines are arranged on the outer wall of the pressure measuring end tube, and the two layers of scale lines include tracheotomy model number scale and endotracheal intubation model number scale.

[0011] Furthermore, the number scale of the tracheotomy model corresponds to the internal sharp port of the trachea under this model, and the number scale of the endotracheal intubation model corresponds to the internal sharp port of the intubation tube under this model.

[0012] Furthermore, the artificial airway fixer includes a first clamping portion, a second clamping portion and a connecting portion, the first clamping portion and the second clamping portion are arranged at both ends of the connecting portion, the first clamping portion is clamped and adapted to the side wall of the artificial airway outer opening, and the second clamping portion is clamped at the scale line on the outer wall of the pressure measuring end tube.

[0013] Furthermore, the first clamping portion and the second clamping portion are both C-shaped clamping structures capable of elastic deformation.

[0014] The airway opening pressure measuring device provided by the present invention has the following advantages:

[0015] 1. The airway opening pressure measuring device of the present invention, when the patient is intubated or tracheotomized and taken offline, connect the patient monitoring end of the device with the pressure measuring end of the ventilator, clip the first clamping part on artificial airways of different models, and then extend the pressure measuring tube into the patient's artificial airway at the corresponding scale, clip it on the second clamping part, and monitor and record on the ventilator.

[0016] 2. The airway opening pressure measuring device of the present invention is simple in design and operation, does not require complicated steps, has low cost of product material consumables, can be made of ordinary pressure measuring tubes, is relatively simple to maintain and clean, has low labor costs, and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of an airway opening pressure measuring device provided by an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the connection between an airway opening pressure measuring device and an artificial airway provided in an embodiment of the present invention;

[0019] In the figure:

[0020] 1-ventilator connecting tube; 2-three-way tube; 21-three-way switch knob; 22-pressure zeroing port; 3-pressure measuring end tube; 4-artificial airway fixer; 41-first clamping part; 42-second clamping part; 43-connecting part; 5-tracheotomy model number scale; 6-endotracheal intubation model number scale; 7-artificial airway. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technical personnel in this field without making creative work are within the scope of protection of the present invention.

[0022] Reference Figure 1 and Figure 2 , an airway opening pressure measuring device, comprising a ventilator connecting tube 1, a three-way tube 2, a pressure measuring end tube 3 and an artificial airway fixer 4, one end of the ventilator connecting tube 1 is connected to the ventilator pressure monitoring end, the other end of the ventilator connecting tube 1 is connected to the pressure measuring end tube 3 through the three-way tube 2, and the other end of the pressure measuring end tube 3 is extended into the patient's artificial airway 7 to measure the pressure; the third end of the three-way tube 2 is different from the ventilator connecting tube 1 and the pressure measuring end tube 3 as a pressure zeroing port 22, which is used for normal pressure calibration, and a three-way switch knob 21 is installed on the three-way tube 2 to control the flow of each end of the three-way tube 2, the artificial airway fixer 4 is clamped and fixed to the outer port of the artificial airway 7 and the pressure measuring end tube 3 to maintain the stability of the structure during testing. In this embodiment, the pressure measuring end tube 3 can achieve measurement by using an ordinary pressure measuring tube.

[0023] Furthermore, the ventilator connecting tube 1 is connected to the inlet of the three-way tube 2, the pressure measuring end tube 3 is connected to the outlet of the three-way tube 2, and the pressure zeroing port 22 is the middle interface of the three-way tube 2.

[0024] Reference Figure 1 and Figure 2 Two layers of scale lines are provided on the outer wall of the pressure measuring end tube 3, and the two layers of scale lines include a tracheotomy model number scale 5 and a tracheal intubation model number scale 6. The tracheotomy model number scale 5 corresponds to the internal tip end of the trachea under this model, and the tracheal intubation model number scale 6 corresponds to the internal tip end of the intubation tube of this model.

[0025] Reference Figure 1 and Figure 2The artificial airway fixer 4 includes a first clamping portion 41, a second clamping portion 42 and a connecting portion 43. The first clamping portion 41 and the second clamping portion 42 are respectively arranged at both ends of the connecting portion 43. The first clamping portion 41 is clamped and adapted with the side wall of the outer opening of the artificial airway 7, and the second clamping portion 42 is clamped at the scale line on the outer wall of the pressure measuring end tube 3. Specifically, the first clamping portion 41 and the second clamping portion 42 are integrally formed with the connecting portion 43. The first clamping portion 41 and the second clamping portion 42 are both C-shaped clamping structural parts that can undergo elastic deformation, including but not limited to polyurethane, polypropylene and nylon material clamping structural parts.

[0026] The working principle of an airway opening pressure measuring device of the present invention is as follows:

[0027] Since the fluctuation of the pressure at the tip of the artificial airway 7 has good synchronization and correlation with the pressure fluctuation in the esophagus, the pressure is measured at the tip of the tracheal tube and the tracheotomy, and the airflow pressure of the patient's inhalation and exhalation is transmitted to the pressure end of the ventilator for identification. When the patient is offline regardless of intubation or tracheotomy, the patient monitoring end of the device is connected to the ventilator pressure measurement end through the ventilator connecting tube 1, the first clamping part 41 of the artificial airway fixer 4 is clamped on the artificial airway 7, and then the corresponding scale on the pressure measuring end tube 3 is extended into the patient's artificial airway 7, and the second clamping part 42 of the artificial airway fixer 4 is clamped on the corresponding scale line on the pressure measuring end tube 3, and monitoring and recording can be performed on the ventilator.

[0028] The above is only a preferred embodiment of the present invention, and is not any formal or substantial limitation of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention, and these improvements and supplements should also be regarded as the protection scope of the present invention. Any technician familiar with this profession, without departing from the spirit and scope of the present invention, can make some changes, modifications and equivalent changes made by using the technical content disclosed above, which are equivalent embodiments of the present invention; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An airway opening pressure measuring device, characterized in that: The invention comprises a ventilator connecting tube (1), a three-way tube (2), a pressure measuring end tube (3) and an artificial airway fixer (4); the ventilator connecting tube (1) and the pressure measuring end tube (3) are connected via the three-way tube (2); a third end of the three-way tube (2) different from the ventilator connecting tube (1) and the pressure measuring end tube (3) is a pressure zeroing port (22); a three-way switch knob (21) is provided on the three-way tube (2); the artificial airway fixer (4) is clamped with the outer port of the artificial airway (7) and the pressure measuring end tube (3); and one end of the pressure measuring end tube (3) away from the three-way tube (2) extends into the interior of the patient's artificial airway (7) to measure the pressure.

2. An airway opening pressure measuring device as claimed in claim 1, characterized in that: The ventilator connecting pipe (1) is connected to the inlet of the three-way pipe (2), the pressure measuring end pipe (3) is connected to the outlet of the three-way pipe (2), and the pressure zeroing port (22) is the middle interface of the three-way pipe (2).

3. An airway opening pressure measuring device as claimed in claim 1, characterized in that: The pressure measuring end tube (3) is a pressure measuring tube. Two layers of scale lines are arranged on the outer wall of the pressure measuring end tube (3). The two layers of scale lines include tracheotomy model number scales (5) and tracheal intubation model number scales (6).

4. An airway opening pressure measuring device as claimed in claim 3, characterized in that: The tracheotomy model number scale (5) corresponds to the internal tip end of the trachea under this model, and the tracheal intubation model number scale (6) corresponds to the internal tip end of the intubation tube under this model.

5. An airway opening pressure measuring device as claimed in claim 3, characterized in that: The artificial airway fixer (4) comprises a first clamping portion (41), a second clamping portion (42) and a connecting portion (43), wherein the first clamping portion (41) and the second clamping portion (42) are respectively arranged at two ends of the connecting portion (43), the first clamping portion (41) is clamped and adapted to the side wall of the outer opening of the artificial airway (7), and the second clamping portion (42) is clamped at the scale line on the outer wall of the pressure measuring end tube (3).

6. An airway opening pressure measuring device as claimed in claim 5, characterized in that: The first clamping portion (41) and the second clamping portion (42) are both C-shaped clamping structures capable of elastic deformation.

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