Measuring device based on Valsalva action

Abstract

The invention discloses a measuring device based on Valsalva action. The measuring device comprises an expiration pressure test meter, a test board, a plastic cup provided with a bandage, an air suction pipe provided with a first valve and a breather pipe provided with a second valve, the expiration pressure testing meter is vertically fixed on the testing table, a patient wears the cup through the bandage to seal the periphery of the mouth and the nose, the patient can breathe through an inner cavity of the cup, the left end of the breather pipe is communicated with the interior of the cup, and the right end of the breather pipe is communicated with an air inlet in the bottom of the expiration pressure testing meter. The lower end of the air suction pipe is communicated with the breather pipe between the cup and the second valve through a tee joint. The device can prevent air leakage, accurately measure inspiration amount, expiration pressure and maintenance time, improve measurement efficiency and provide accurate diagnosis basis for doctors.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, in particular to a measuring device based on Valsalva maneuver. Background Art

[0002] The Valsalva maneuver is very commonly used and necessary in clinical practice, especially for the diagnosis and treatment of some diseases, such as hypertrophic obstructive cardiomyopathy, patent foramen ovale, venous reflux in the lower extremities, and termination of paroxysmal supraventricular tachycardia. The Valsalva maneuver can help doctors check whether patients with hypertrophic cardiomyopathy have the possibility of obstruction, because patients with hypertrophic cardiomyopathy with obstruction have a higher risk of sudden death and a poorer prognosis than patients with non-obstructive hypertrophic cardiomyopathy. Ablation therapy or even surgical treatment may be needed to reduce obstruction and improve prognosis. In addition, Valsalva is also very important for identifying whether patients with patent foramen ovale have right-to-left shunt. Patent foramen ovale is very common in clinical practice, and can be seen in about 1 / 4 of adults. Generally, because the left atrial pressure is higher than the right atrial pressure, patients with patent foramen ovale show left-to-right shunt, but various reasons that increase the right atrial pressure can cause right-to-left shunt at the foramen ovale, which can cause patients to have paradoxical embolism, migraine, diver's disease, etc. In order to better observe whether there is right-to-left shunt in patients with patent foramen ovale, patients are often required to undergo a provocative test. One of the commonly used provocative measures in clinical practice is the Valsalva maneuver, which can increase the detection rate of right-to-left shunt in patients with patent foramen ovale. The Valsalva maneuver can also induce reflux in the lower limb veins, thereby testing the function of the lower limb venous valves. During an attack of paroxysmal supraventricular tachycardia, patients often experience uncomfortable symptoms such as palpitations due to the fast heart rate. A large number of practices have confirmed that the Valsalva maneuver can terminate the attack. Therefore, it is crucial for patients to complete the Valsalva maneuver in a standardized manner.

[0003] The traditional Valsalva maneuver refers to the patient closing the glottis and doing a forced exhalation action in a normal or deep inhalation state for 15-20 seconds, requiring the pressure to reach 40mmHg and maintain for at least 5-10 seconds, and then exhaling normally. The modified Valsalva maneuver has the following three steps: a. The patient is in a 45° semi-recumbent position, holding a 10ml syringe and blowing forcefully for 15 seconds. b. Immediately after the blowing, the patient lies on his back and raises his legs to 45-90°, maintaining for 15 seconds. c. After 15 seconds, return to the semi-recumbent position, maintain the semi-recumbent position for 45 seconds, and then observe for 5 to 10 minutes. Whether it is the traditional Valsalva maneuver or the modified Valsalva maneuver, both increase the intrathoracic pressure by having the patient do this strong closed exhalation action, thereby affecting blood circulation and the functional state of the vagus nerve, and achieving the purpose of diagnosing and treating certain diseases.

[0004] According to the characteristic hemodynamic characteristics of the Valsalva maneuver, it can be divided into four phases. Phase 1: In the first few seconds, due to the increase in intrathoracic pressure, blood is discharged from the left atrium and blood pressure increases; then the aortic pressure increases, the pressure receptors are activated, and the heart rate decreases. Phase 2: Between 5-15 seconds, due to the increase in intrathoracic pressure, venous return decreases, cardiac output and blood pressure decrease, and the heart rate reflexively accelerates. Phase 3: It begins when the Valsalva maneuver stops, the intrathoracic pressure and left atrial pressure drop acutely, and the blood flow returning to the right atrium increases significantly, so the right atrial pressure increases. Phase 4: It is characterized by increased aortic pressure and a reflex decrease in heart rate. Clinically, a full Valsalva maneuver is manifested by jugular vein dilation, facial flushing, and increased abdominal muscle tension, providing accurate information for doctors' diagnosis.

[0005] In the prior art, the measurement devices for patients doing the Valsalva maneuver have the following drawbacks: First, the patient's inhalation volume, expiratory pressure and maintenance time cannot be accurately measured, which often leads to the patient's inability to correctly complete the Valsalva maneuver. Second, some auxiliary devices may not be tightly wrapped or leak when in use. Third, since patients do not fully understand the maneuver, especially the movements of elderly and young patients are very random, the quality of the Valsalva maneuver is poor. Therefore, even if the so-called "Valsalva maneuver" is performed, it is still difficult to help doctors accurately assess the relevant disease conditions. At present, there is a lack of simple and efficient devices to detect whether the patient's Valsalva maneuver is well coordinated and whether the two important detection thresholds of pressure 40mmHg and duration 5-10s are reached. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a measuring device based on the Valsalva maneuver, which has the characteristics of simple structure, convenient use, air leakage prevention and accurate measurement of inhalation volume, expiratory pressure and maintenance time.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a measuring device based on the Valsalva maneuver, including an expiratory pressure tester, a test bench, a plastic cup with a strap, an inhalation tube equipped with a first valve, and a ventilation tube equipped with a second valve; the expiratory pressure tester is vertically fixed on the test bench, the patient puts on the cup through the strap to seal the periphery of the mouth and nose, the inner cavity of the cup allows the patient to breathe deeply through the inhalation tube, the left end of the ventilation tube is connected to the inside of the cup, and the right end is connected to the bottom air inlet of the expiratory pressure tester, and the lower end of the inhalation tube is connected to the ventilation tube between the cup and the second valve through a tee.

[0008] The above-mentioned measuring device based on the Valsalva action, the exhalation pressure tester comprises a cylinder with an air inlet on the bottom and a piston rod with a scale, and the piston rod is slidably mounted in the cylinder.

[0009] The above-mentioned measuring device based on Valsalva action also includes an air flow meter and an intake pipe, wherein the lower port of the intake pipe is connected to the upper port of the air flow meter, and the lower port of the air flow meter is connected to the upper port of the intake pipe.

[0010] The above-mentioned measuring device based on Valsalva action also includes a digital pressure sensor, which is connected to the ventilation pipe between the second valve and the cylinder air inlet through a branch pipe.

[0011] The above-mentioned measuring device based on Valsalva action also includes a stopwatch timer, which is fixed on the front side of the test bench.

[0012] The present invention provides a measuring device based on the Valsalva maneuver, which comprises an exhalation pressure tester, a test platform, a plastic cup with a strap, an inhalation pipe equipped with a first valve, and a ventilation pipe equipped with a second valve; the exhalation pressure tester is vertically fixed on the test platform, a patient puts on the cup through the strap to seal the periphery of the mouth and nose, the inner cavity of the cup allows the patient to breathe deeply through the inhalation pipe, the left end of the ventilation pipe is connected to the inside of the cup, and the right end is connected to the bottom air inlet of the exhalation pressure tester, and the lower end of the inhalation pipe is connected to the ventilation pipe between the cup and the second valve through a three-way connection.

[0013] The beneficial technical effects of the present invention are:

[0014] First, the air intake pipe and air flow meter can accurately record the patient's maximum inhalation volume. Closing the first valve prevents the inhaled air from being lost at will. At this time, the air inhaled by the patient is in a sealed state in the device, ensuring no leakage and test accuracy. The patient can see the maximum value of his first inhalation volume on the air flow meter, and have a target to catch up with in the second inhalation experiment, preventing blindness in the experimental action.

[0015] Second, open the second valve to measure the exhalation pressure using a pressure tester and a digital pressure sensor to verify the accuracy of each other.

[0016] Third, the stopwatch timer can accurately grasp the maintenance time of chest pressure during deep exhalation.

[0017] Fourth, patients can easily master the use of the device through doctor's instructions, successfully complete the Valsalva maneuver, and record the original data. The device has the characteristics of simple structure, easy use, air leakage prevention, accurate measurement of inhalation volume, expiratory pressure and maintenance time, which can improve measurement efficiency, provide doctors with accurate and reliable measurement data, and assist clinical diagnosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] The components in the figure are numbered as follows: patient 1, air flow meter 2, intake pipe 3, cylinder 4, piston rod 5, scale 6, stopwatch timer 7, digital pressure sensor 8, test bench 9, branch pipe 10, second valve 11, ventilation pipe 12, first valve 13, suction pipe 14, cup 15, and strap 16. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figure 1As shown, the present invention provides a measuring device based on the Valsalva maneuver, and its use method is as follows; the stopwatch timer 7 can be manually operated, and the patient presses the stopwatch timer 7 button while exhaling, and presses the button again to end the timing after the exhalation. An automatic timer can also be installed, and the automatic timer is synchronized with the switching action of the second valve 11. The automatic timer starts timing when the second valve 11 is opened, and stops timing when the second valve 11 is closed. Operation steps: 1. Close the second valve 11, and the patient puts on the cup 15 to open the first valve 13. Since the cup 15 is made of plastic material and has good sealing performance, it is easy to disinfect and is worn on the mouth and nose without affecting the patient's breathing action. The patient inhales and exhales normally through the inhalation tube 14, and it should be checked whether the cup 15 seals the periphery of the mouth and nose to prevent air leakage. 2. After exhaling, the patient starts to inhale deeply until the lungs are fully inflated, and the air flow meter 2 records the maximum inhalation volume, closes the first valve 13, and starts to hold the breath. Third, open the second valve 11 and exhale the held air while observing the stopwatch 7. This must last for more than 15-20 seconds. When the exhalation is finished, close the second valve 11. At this time, the patient can take off the cup 15 and inhale. Fourth, observe the scale 6 of the piston rod 5 rising after exhalation and the pressure value of the digital pressure sensor 8 to see if the two data correspond. If the first effect is not good, the patient takes the first inhalation volume value and exhalation pressure value as the target to catch up. When repeating the breathing action, observe the air flow meter 2 and the digital pressure sensor 8 to achieve a satisfactory effect.

[0022] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also make appropriate changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A measuring device based on Valsalva maneuver, characterized in that: The invention comprises an expiratory pressure tester, a test bench (9), a plastic cup (15) provided with a strap (16), an inhalation pipe (14) provided with a first valve (13), and a ventilation pipe (12) provided with a second valve (11); the expiratory pressure tester is vertically fixed on the test bench (9); a patient puts on the cup (15) through the strap (16) to seal the periphery of the mouth and nose; the inner cavity of the cup (15) allows the patient (1) to breathe deeply through the inhalation pipe (14); the left end of the ventilation pipe (12) is connected to the inside of the cup (15), and the right end is connected to the bottom air inlet of the expiratory pressure tester; the lower end of the inhalation pipe (14) is connected to the ventilation pipe (12) between the cup (15) and the second valve (11) through a three-way connection.

2. A measuring device based on Valsalva maneuver according to claim 1, characterized in that: The exhalation pressure tester comprises a cylinder (4) with an air inlet at the bottom and a piston rod (5) with a scale (6), wherein the piston rod (5) is slidably mounted in the cylinder (4).

3. A measuring device based on Valsalva maneuver according to claim 2, characterized in that: It also includes an air flow meter (2) and an air intake pipe (3), wherein the lower port of the air intake pipe (3) is connected to the upper port of the air flow meter (2), and the lower port of the air flow meter (2) is connected to the upper port of the intake pipe (14).

4. A measuring device based on Valsalva maneuver according to claim 3, characterized in that: It also includes a digital pressure sensor (8), which is connected to a ventilation pipe (12) between the second valve (11) and the air inlet of the cylinder (4) through a branch pipe (10).

5. A measuring device based on Valsalva maneuver according to claim 4, characterized in that: It also includes a stopwatch timer (7), which is fixed on the front side of the test bench (9).

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