Breathing pressure monitoring system

By designing a respiratory pressure monitoring system including a respiratory pressure sensing device, a fixed strap and a respiratory state prompt device, the problem of inaccurate puncture caused by breathing during minimally invasive surgery is solved, and the timing of puncture is automatically judged, and the accuracy and efficiency of the surgery are improved.

CN222929767UActive Publication Date: 2025-06-03SUZHOU HENGRUI CALLISYN BIOLOGICAL MEDICINE TECH CO LTD +1
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Patent Information

Application Number
CN202421620968.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Priority Date
2023-07-21
Filing Date
2024-07-10
Publication Date
2025-06-03
Estimated Expiration
2034-07-10

AI Technical Summary

Technical Problem

In minimally invasive surgery, the patient's breathing leads to morphological changes in the chest and abdomen area, affecting the accuracy of the puncture. The prior art breathing monitoring devices are expensive or complex in structure and cumbersome in operation. The choice of puncture timing depends on doctor's experience, affecting accuracy and efficiency.

Method used

A respiratory pressure monitoring system is designed, including a respiratory pressure sensing device, a fixed strap and a breathing state prompting device. The sensing device is fixed to the human body detection part through the fixed strap. The sensing device detects the respiratory pressure and automatically determines the optimal puncture timing through the prompting device.

Benefits of technology

Accurate monitoring of the patient's respiratory status and automatic judgment of the puncture timing are achieved, the accuracy and efficiency of the puncture are improved, and the device is simple in structure and easy to operate, reducing costs.

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Abstract

The utility model relates to a respiratory pressure monitoring system. Firstly, the device is provided with a fixing bandage, a breathing pressure sensing device and a breathing state prompting device, abdomen changes generated when a patient breathes are transmitted to the breathing pressure sensing device through the fixing bandage, and the breathing pressure sensing device quantifies the abdomen changes through detected pressure; the breathing state prompting device receives the detected pressure, grades the pressure and prompts different pressure grades, so that a user can conveniently find the optimal puncture opportunity, and the device can be flexibly applied to various operation scenes; and secondly, a pressure overload protection device is arranged, so that the problem of pressure overload of the sensing device is effectively solved, and the clinical service life of the equipment is ensured.
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Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a respiratory pressure monitoring system. Background Art

[0002] Minimally invasive surgery is widely used in the treatment fields such as liver tumors, for example, biopsy, ablation, and particle implantation. Most of them achieve sampling, ablation, or particle implantation treatment by percutaneous puncture of a puncture needle to reach the lesion. However, during the percutaneous puncture process, due to the patient's own breathing, the morphology of the chest and abdomen area expands and contracts, which causes the marked puncture position to change, and it is impossible to ensure the puncture accuracy; the change of the puncture position often requires multiple adjustments of the puncture angle under image guidance, resulting in problems such as increased operation time and inaccurate puncture.

[0003] In order to effectively solve this problem, it is necessary to monitor and manage the patient's respiratory movement. A relatively common management method is to perform respiratory training on the patient through a respiratory monitoring device to achieve breath-holding or respiratory gating treatment. The current technical means for realizing respiratory monitoring are divided into non-contact and contact means. Among them, non-contact mainly includes optical body surface, laser ranging, etc., and contact includes air bags, respiratory valves, and force sensors, etc. The non-contact monitoring means are generally expensive, and the contact monitoring means often have complex structures and cumbersome operations.

[0004] In addition, the puncture timing often requires the patient's breathing to reach a certain state to be suitable for puncture, that is, the patient's breathing needs to reach a certain state to be suitable for puncture. In the related art, the puncture timing is generally determined by the doctor based on experience. Therefore, the selection of the puncture timing often varies from person to person, which affects the puncture accuracy and puncture efficiency to a certain extent. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a respiratory pressure monitoring system, which has a simple structure, is easy to operate, and can automatically judge the puncture timing, providing puncture accuracy and puncture efficiency.

[0006] The purpose of the utility model can be realized by the following technical solutions:

[0007] A respiratory pressure monitoring system, comprising:

[0008] A respiratory pressure sensing device, the respiratory pressure sensing device comprising a pressure sensor and a pressure overload protection device; the pressure overload protection device comprises an elastic member and a limiting device, the elastic member is arranged on the pressure sensor, the limiting device is arranged on the side of the elastic member away from the pressure sensor, and when the deformation amount of the elastic member reaches a preset value, the limiting device restricts the elastic member from further deforming;

[0009] A fixing strap, which is located on the breathing pressure sensing device to fix the breathing pressure sensing device at the human body detection site. The fixing strap exerts a force on the breathing pressure sensing device. The height of the human body detection site changes with human breathing, and the force exerted by the fixing strap on the breathing pressure sensing device changes with the distance between the highest position of the human body detection site and the fixing strap.

[0010] A breathing state prompting device, which is electrically connected to the pressure sensor and classifies and prompts according to the pressure value detected by the pressure sensor.

[0011] Preferably, the elastic member is a wave spring or a spring.

[0012] Preferably, the pressure sensor includes a sensor base and a sensing body. The sensing body is arranged on the upper surface of the sensor base, and the side of the sensing body away from the sensor base is the pressure acting surface. The elastic member acts on the pressure acting surface.

[0013] Preferably, the limiting device is a limiting cover. The limiting cover is sleeved on the elastic member. When in the limiting state, the sensing body is accommodated in the limiting cover, and the lower surface of the limiting cover abuts against the upper surface of the sensor base.

[0014] Preferably, both the sensor base and the sensing body are disc-shaped, and the diameter of the sensing body is smaller than that of the sensor base. The bottom of the limiting cover is circular, and the diameter of the limiting cover is smaller than that of the sensor base;

[0015] So as to support the limiting cover to continue to move onto the sensor base after completely accommodating the sensing body through the size difference between the sensor base and the sensing body.

[0016] Preferably, the breathing state prompting device includes a processor and a breathing state prompter. The processor is used to control the breathing state prompter. The processor is electrically connected to the pressure sensor, classifies the pressure value according to the pressure value received by the pressure sensor, and the breathing state prompter prompts the pressure state according to the classification of the pressure value.

[0017] Preferably, the breathing state prompter includes a voice broadcaster, and the processor controls the voice broadcaster according to the received pressure value;

[0018] When the pressure value is between N1 and N2, the processor controls the voice broadcaster to issue a prompt of "The pressure is moderate. Patient, please hold your breath and start the puncture."

[0019] Alternatively, when the pressure value is less than N1, the processor controls the voice broadcaster to issue a prompt of "The pressure is too loose and not suitable for puncture"; when the pressure value is greater than N2, the processor controls the voice broadcaster to issue a prompt of "The pressure is too tight and not suitable for puncture".

[0020] Preferably, the respiratory pressure monitoring system further includes a first base, and the sensor base is disposed on the first base.

[0021] Preferably, the respiratory pressure monitoring system further includes a protective cover configured to be telescopic. The protective cover covers the first base and is fixedly connected to the first base. An accommodation cavity is formed by the inner surface of the protective cover and a partial upper surface of the first base. Both the pressure sensor and the pressure overload protection device are located in the accommodation cavity.

[0022] Preferably, the respiratory pressure monitoring system further includes a universal tube bracket. The universal tube bracket includes a bracket base, a rigid tube, and a universal flexible rod. The bracket base is connected to the bed body. One end of the rigid tube is connected to the bracket base, and the other end of the rigid tube is connected to one end of the universal flexible rod. The other end of the universal flexible rod is used to fix the respiratory state prompting device.

[0023] The present utility model provides a respiratory pressure monitoring system, which has the following beneficial effects: First, by setting the fixing strap, the respiratory pressure sensing device, and the respiratory state prompting device, the abdominal changes generated during the patient's breathing are transmitted to the respiratory pressure sensing device through the fixing strap. The respiratory pressure sensing device quantifies the abdominal changes through the detected pressure. The respiratory state prompting device receives the detected pressure, classifies the pressure, and prompts different pressure levels, facilitating the user to find the best puncture timing and being flexibly applicable to various surgical scenarios. Second, by setting the pressure overload protection device, the problem of pressure overload of the sensing device is effectively solved, ensuring the clinical service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present utility model from a perspective.

[0025] Figure 2 It is an exploded structure schematic diagram of the respiratory pressure sensing device of an embodiment of the present utility model from a perspective.

[0026] Figure 3 It is an assembled structure schematic diagram of the respiratory pressure sensing device of an embodiment of the present utility model from a perspective.

[0027] Figure 4 It is an assembled structure schematic diagram of the fixing strap and the respiratory pressure sensing device of an embodiment of the present utility model from a perspective.

[0028] Figure 5 This is a schematic structural diagram of a pressure sensor from a perspective of an embodiment of the present utility model.

[0029] Figure 6 This is a schematic assembly structure diagram of a pressure sensor and a first base from a perspective of an embodiment of the present utility model.

[0030] Figure 7 This is a schematic structural diagram of an elastic member from a perspective of an embodiment of the present utility model.

[0031] Figure 8 This is a sectional view of the initial state of a respiratory pressure sensing device from a perspective of an embodiment of the present utility model.

[0032] Figure 9 This is a sectional view of the lower limit state of a respiratory pressure sensing device from a perspective of an embodiment of the present utility model.

[0033] Figure 10 This is a sectional view of the upper limit state of a respiratory pressure sensing device from a perspective of an embodiment of the present utility model.

[0034] Figure 11 This is a schematic structural diagram of a universal tube bracket from a perspective of an embodiment of the present utility model.

[0035] Figure 12 This is a schematic structural diagram of a respiratory state prompting device from a perspective of an embodiment of the present utility model.

[0036] Icons: 10 - First base; 20 - Pressure sensor; 201 - Sensor base; 202 - Sensing main body; 2021 - Pressure acting surface; 30 - Limiting device; 40 - Elastic member; 50 - Protective cover; 60 - Respiratory state prompting device; 601 - Too loose prompting lamp; 602 - Moderate prompting lamp; 603 - Too tight prompting lamp; 70 - Universal tube bracket; 701 - Bracket base; 702 - Rigid tube; 703 - Universal flexible rod; 80 - Fixed strap. Detailed implementation manners

[0037] To make the above objects, features, and advantages of the present application more apparent and understandable, the following describes the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0038] As Figure 1As shown in FIGS. -5, the present utility model provides a respiratory pressure monitoring system, including a respiratory pressure sensing device, a fixing strap 80, and a respiratory state prompting device 60; wherein the respiratory pressure sensing device is fixed to the detection part of the user through the fixing strap 80; the respiratory pressure sensing device is electrically connected to the respiratory state prompting device 60 to transmit the detected pressure to the respiratory state prompting device 60;

[0039] As Figure 2 As shown in FIGS. -10, the respiratory pressure sensing device includes a pressure sensor 20 and a pressure overload protection device; the pressure overload protection device includes an elastic member 40 and a limiting device 30. The elastic member 40 is arranged on the pressure sensor 20, and a limiting device 30 is arranged on the side of the elastic member 40 away from the pressure sensor 20. When the deformation amount of the elastic member 40 reaches a preset value, the limiting device 30 can limit the continuous deformation of the elastic member 40.

[0040] Referring to Figure 5 -6, the pressure sensor 20 includes a sensor base 201 and a sensing main body 202. The sensor base 201 is arranged on the first base 10, and the sensing main body 202 is arranged on the upper surface of the sensor base 201. The side of the sensing main body 202 away from the sensor base 201 is a pressure acting surface 2021, and the elastic member 40 acts on the pressure acting surface 2021; a cable is arranged on the sensor base 201. When the pressure of the compression or the rebound force of the elastic member 40 acts on the pressure acting surface 2021, the sensing main body 202 will collect the pressure and transmit it to the respiratory state prompting device 60 in real time through the cable.

[0041] The respiratory pressure sensing device further includes a first base 10, and the pressure sensor 20 is arranged on the first base; a water-absorbing fabric is attached to the surface of the first base 10 in contact with the chest and abdomen of the human body, which can not only increase the friction force, but also absorb the sweat of the patient during long-term use, further improving the stability of the respiratory pressure sensing device during the patient's breathing process.

[0042] Furthermore, a plurality of mounting holes are formed in the sensor base 201, and the sensor base 201 is fixedly connected to the first base 10 by inserting fasteners into the mounting holes.

[0043] The respiratory pressure sensing device further includes a protective cover 50. The protective cover 50 covers the first base 10 and is fixedly connected to the first base 10. The inner surface of the protective cover 50 and a part of the upper surface of the first base 10 enclose a cavity to form a receiving cavity, and both the pressure sensor 20 and the pressure overload protection device are located in the receiving cavity. The protective cover 50 is a telescopic structure, and the protective cover is preferably made of rubber material.

[0044] The protective cover 50 needs to meet the following requirements: First, the protective cover 50 can ensure that when the fixing strap 80 applies pressure to the respiratory pressure sensing device, it can transmit the pressure and can change accordingly with the compression or rebound of the elastic member 40; Second, the protective cover 50 should be able to increase the friction between the protective cover 50 and the fixing strap 80, prevent the fixing strap 80 from shifting or slipping when applying pressure to the respiratory pressure sensing device, and enhance the stability of the device during use; Finally, the setting of the protective cover 50 can ensure that its internal components are not damaged by the outside world, thereby increasing the service life of the device.

[0045] The respiratory state prompting device 60 includes a processor and a respiratory state prompter. The processor is electrically connected to the pressure sensor 20, classifies the pressure according to the received pressure value, and the respiratory state prompter prompts the pressure state according to the classification of the pressure value.

[0046] When the pressure value is between N1 and N2, the processor controls the respiratory state prompter to issue a prompt indicating that the pressure is moderate; or when the pressure value is less than N1, the processor controls the respiratory state prompter to issue a prompt indicating that the pressure is too loose. When the pressure value is between N1 and N2, the processor controls the respiratory state prompter to issue a prompt indicating that the pressure is moderate. When the pressure value is greater than N2, the processor controls the respiratory state prompter to issue a prompt indicating that the pressure is too tight.

[0047] Refer to Figure 1 - Figure 4 When a puncture operation needs to be performed, the operator fixes the respiratory pressure sensing device on the patient's detection site (the detection site is generally the chest or abdomen, hereinafter referred to as the chest and abdomen) through the fixing strap 80. At this time, the respiratory pressure sensing device is located between the patient's chest and abdomen and the fixing strap 80. When the patient switches between inhalation and exhalation, the chest and abdomen will produce a significant height change relative to other parts of the body, thereby generating tension, and the distance between the highest point of the chest and abdomen and the fixing strap 80 also changes accordingly.

[0048] Specifically, when the patient starts to inhale from the initial state of the chest and abdomen, at this time, under the action of the outward tension of inhalation on the chest and abdomen, the distance between the chest and abdomen and the fixing strap 80 gradually decreases. Therefore, the fixing strap 80 squeezes the elastic member 40, and the elastic member 40 is gradually compressed, and the pressure is applied to the pressure acting surface 2021 of the pressure sensor 20. After the pressure sensor 20 detects the pressure, the pressure information will be fed back to the processor of the respiratory state prompting device 60. The processor classifies the detected pressure value and gives different prompts according to the classified respiratory state of the patient to facilitate the user to find the puncture opportunity;

[0049] The patient continues to inhale, and the distance between the chest and abdomen and the fixing strap 80 continues to decrease. The fixing strap 80 continues to squeeze the elastic member 40 until the maximum compression amount of the elastic member 40 is reached (it should be noted that the maximum compression amount of the elastic member 40 can be set according to the numerical range of the maximum pressure that the pressure sensor 20 can withstand). The limiting device provided on the elastic member 40 can prevent the elastic member 40 from deforming further, thereby avoiding damage to the internal components of the pressure sensor 20 due to excessive force, effectively extending the service life of the pressure sensor 20, and also avoiding excessive deformation of the elastic member resulting in the loss of elastic reset ability.

[0050] The patient holds their breath briefly and exhales air. During exhalation, the chest and abdomen of the human body gradually flatten and gradually move away from the fixing strap 80. The elastic member 40 provided on the pressure acting surface 2021 gradually rebounds, and the resilience acts on the pressure acting surface 2021. The pressure sensor 20 feeds back the pressure information to the breathing state prompting device 60 to obtain the state of the chest and abdomen during the patient's exhalation.

[0051] Through the mutual cooperation of the fixing strap 80, the breathing pressure sensing device, and the breathing state prompting device 60 of the present utility model, the monitoring and prompting of the patient's breathing state can be realized, which is convenient and fast to find the puncture opportunity, with a simple structure and easy operation.

[0052] Furthermore, the limiting device 30 is preferably in the form of a limiting cover. The fixing strap 80 is made of an elastic material. The elastic strap can adapt to patients of different body types, increasing the flexibility of the device application, and the elastic strap can accommodate the undulation of the chest and abdomen during the patient's breathing, improving the comfort of the device use; the elastic member 40 is preferably a wave spring, a spring, etc.

[0053] The limiting cover is sleeved on the elastic member 40. When the human body is in the inhalation state, the chest and abdomen of the human body gradually bulge, the first base 10 gradually approaches the fixing strap 80 and compresses the elastic member 40. When the maximum compression amount set for the elastic member 40 is reached, the sensing body 202 is received in the limiting cover, and the bottom of the limiting cover abuts against the upper surface of the sensor base 201, triggering pressure overload protection; damage to the internal components of the pressure sensor is avoided, and the service life of the pressure sensor is effectively extended.

[0054] In some embodiments, both the sensor base 201 and the sensing body 202 are disc-shaped, and the diameter of the sensing body 202 is smaller than that of the sensor base 201; the bottom of the limiting cover is circular, and the diameter of the limiting cover is smaller than that of the sensor base 201; by using the dimensional difference between the sensor base 201 and the sensing body 202, when the limiting cover continues to move onto the sensor base 201 after completely accommodating the sensing body 202, a support point is provided, which can ensure that the bottom of the limiting cover abuts against the sensor base 201, thereby completing the limiting and realizing the protection of the pressure sensor 20.

[0055] In some embodiments, referring to Figure 12 , the breathing state indicator includes a display panel, and indicator lights are arranged on both opposite side surfaces of the display panel.

[0056] In one embodiment, the indicator lights only include the moderate indicator light 602.

[0057] In another embodiment, the indicator lights include the too-loose indicator light 601, the moderate indicator light 602, and the too-tight indicator light 603.

[0058] The indicator lights on both the front and back sides of the display panel are the same, which is convenient for patients and medical staff to obtain the same pressure information simultaneously, that is, the current state of the chest and abdomen, so that medical staff can guide patients to adjust the chest and abdomen to the best puncture form through breathing.

[0059] Furthermore, when the breathing pressure sensing device is placed at different positions on the chest and abdomen, since the undulating heights of different parts of the chest and abdomen during breathing are different, the magnitudes of the forces exerted on the breathing pressure sensing device by the fixing straps are also different, and thus the pressure information transmitted by the breathing pressure sensing devices placed at different positions to the breathing state indicating device is also different. Therefore, this device can set corresponding pressure ranges for the breathing pressure sensing device according to the undulating heights of different positions on the chest and abdomen during breathing, thereby ensuring the accurate monitoring of the breathing state.

[0060] In this embodiment, the breathing pressure sensing device is located at the middle of the patient's chest or abdomen. At this time, N1 takes the value of 5N and N2 takes the value of 8N. When the patient inhales air and the chest and abdomen slightly bulge, after the fixing strap 80 generates pressure on the breathing pressure sensing device, when the pressure detected by the pressure sensor 20 is less than 5N, the too-loose indicator light 601 lights up; when the patient continues to inhale, when the pressure detected by the pressure sensor 20 is between 5N and 8N, the too-loose indicator light 601 goes out and the moderate indicator light 602 lights up; when the patient continues to inhale, when the pressure detected by the pressure sensor 20 exceeds 8N, the moderate indicator light 602 goes out and the too-tight indicator light 603 lights up.

[0061] After a patient briefly holds their breath and then exhales, during the exhalation process, the pressure received by the pressure sensor 20 gradually decreases. When the pressure detected by the pressure sensor 20 is between 5N and 8N, the over-tight warning light 603 goes out, and the appropriate warning light 602 lights up again. The patient continues to exhale. When the pressure detected by the pressure sensor 20 is less than 5N, the appropriate warning light 602 goes out, and the over-loose warning light 601 lights up.

[0062] When there is only the appropriate warning light among the warning lights, when the pressure detected by the pressure sensor 20 is between 5N and 8N, the appropriate warning light 602 lights up.

[0063] During a patient's complete inhalation and exhalation process, the appropriate warning light 602 will light up twice. The pressure range detected by the respiratory pressure sensing device is between 5N and 8N. At this time, the patient's chest cavity morphology is most suitable for puncture, facilitating the doctor to find the puncture opportunity and improving the accuracy and efficiency of the operation.

[0064] The respiratory state indicator further includes a voice broadcast device. When the appropriate warning light lights up, the processor controls the voice broadcast device to issue a prompt of "The pressure is appropriate. Patient, please hold your breath and start the puncture."

[0065] In another embodiment, the respiratory state prompting device includes a processor and a voice broadcast device. The processor classifies the pressure according to the received pressure value, and the voice broadcast device prompts the pressure state according to the classification of the pressure value. When the pressure value is less than N1, the processor controls the voice broadcast device to issue a prompt of "The pressure is too loose and not suitable for puncture"; when the pressure value is between N1 and N2, the processor controls the voice broadcast device to issue a prompt of "The pressure is appropriate. Patient, please hold your breath and start the puncture." When the pressure value is greater than N2, the processor controls the voice broadcast device to issue a prompt of "The pressure is too tight and not suitable for puncture."

[0066] The processor may also only control the voice broadcast device to issue a prompt of "The pressure is appropriate. Patient, please hold your breath and start the puncture." when the pressure value is between N1 and N2.

[0067] In some embodiments, referring to Figure 1 and Figure 11, the respiratory pressure monitoring system further includes a universal tube bracket 70. The universal tube bracket 70 includes a bracket base 701, a rigid tube 702, and a universal flexible rod 703. The bracket base 701 is connected to the bed body. One end of the rigid tube 702 is connected to the bracket base 701, and the other end of the rigid tube 702 is connected to one end of the universal flexible rod 703. The other end of the universal flexible rod 703 is used to fix the respiratory state prompting device 60. The universal tube bracket 70 can suspend and fix the respiratory state prompting device 60, which is convenient for patients in the supine position to observe, and is also convenient for medical staff to observe the patient's respiratory state in real time according to the specific situation of the operation. Moreover, the universal flexible rod 703 can be adjusted at any angle, which is convenient for medical staff and patients to adjust the respiratory state prompting device 60 to a suitable observation angle.

[0068] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

Claims

1. A respiratory pressure monitoring system, characterized in that: include: A respiratory pressure sensing device, the respiratory pressure sensing device comprising a pressure sensor and a pressure overload protection device; The pressure overload protection device comprises an elastic member and a limiting device, wherein the elastic member is arranged on the pressure sensor, and the limiting device is arranged on a side of the elastic member away from the pressure sensor, and when the deformation amount of the elastic member reaches a preset value, the limiting device limits the elastic member from further deformation; A fixing strap, the fixing strap is located on the respiratory pressure sensing device to fix the respiratory pressure sensing device to a detection part of a human body, the fixing strap generates a force on the respiratory pressure sensing device, the height of the detection part of a human body changes with human breathing, and the force of the fixing strap on the respiratory pressure sensing device changes with the distance between the highest position of the detection part of the human body and the fixing strap; A breathing state prompting device is electrically connected to the pressure sensor and performs classification and prompting according to the pressure value detected by the pressure sensor.

2. The respiratory pressure monitoring system according to claim 1, characterized in that: The elastic member is a wave spring or a spring.

3. The respiratory pressure monitoring system according to claim 1, characterized in that: The pressure sensor comprises a sensor base and a sensing body. The sensing body is arranged on the upper surface of the sensor base. The side of the sensing body away from the sensor base is a pressure acting surface. The elastic member acts on the pressure acting surface.

4. The respiratory pressure monitoring system according to claim 3, characterized in that: The limiting device is a limiting cover, which is sleeved on the elastic member. When the limiting cover is in a limiting state, the sensing body is accommodated in the limiting cover, and the lower surface of the limiting cover abuts against the upper surface of the sensor base.

5. The respiratory pressure monitoring system according to claim 4, characterized in that: The sensor base and the sensing body are both disc-shaped, and the diameter of the sensing body is smaller than the diameter of the sensor base; the bottom of the limiting cover is circular, and the diameter of the limiting cover is smaller than the diameter of the sensor base; The size difference between the sensor base and the sensing body is used to provide support for the limiting cover when the limiting cover continues to move onto the sensor base after completely accommodating the sensing body.

6. The respiratory pressure monitoring system according to claim 3, characterized in that: The breathing status prompting device includes a processor and a breathing status prompter. The processor is used to control the breathing status prompter. The processor is electrically connected to the pressure sensor and classifies the pressure values ​​according to the pressure values ​​detected by the pressure sensor. The breathing status prompter prompts the pressure status according to the classification of the pressure values.

7. The respiratory pressure monitoring system according to claim 6, characterized in that: The breathing state prompter includes a voice announcer, and the processor controls the voice announcer according to the received pressure value; When the pressure value is between N1 and N2, the processor controls the voice announcer to issue a prompt of "pressure is moderate, patient please hold your breath, start puncture"; Or when the pressure value is less than N1, the processor controls the voice announcer to issue a prompt of "pressure is too loose, not suitable for puncture"; when the pressure value is between N1 and N2, the processor controls the voice announcer to issue a prompt of "pressure is moderate, please hold your breath and start puncture"; when the pressure value is greater than N2, the processor controls the voice announcer to issue a prompt of "pressure is too tight, not suitable for puncture".

8. The respiratory pressure monitoring system according to claim 3, characterized in that: The respiratory pressure monitoring system further comprises a first base, and the sensor base is arranged on the first base.

9. The respiratory pressure monitoring system according to claim 8, characterized in that: The respiratory pressure monitoring system also includes a protective cover, which is configured to be retractable. The protective cover is covered on the first base and fixedly connected to the first base. The inner surface of the protective cover and a portion of the upper surface of the first base form a accommodating cavity. The pressure sensor and the pressure overload protection device are both located in the accommodating cavity.

10. The respiratory pressure monitoring system according to any one of claims 1 to 9, characterized in that: The respiratory pressure monitoring system also includes a universal tube bracket, which includes a bracket base, a rigid tube and a universal soft rod. The bracket base is connected to the bed, one end of the rigid tube is connected to the bracket base, the other end of the rigid tube is connected to one end of the universal soft rod, and the other end of the universal soft rod is used to fix the respiratory status prompt device.