A breathing detection system

Abstract

The present invention relates to a breathing detection system, comprising: a mask, configured to cover at least part of the user's face to transfer oxygen to the user; an oxygen supply device, configured to provide oxygen to the user through the mask; a first monitoring unit, configured to monitor physiological parameters that change with changes in the partial pressure of carbon dioxide in the user's arterial blood; and a central control unit, the central control unit is respectively connected to the oxygen supply device and the first monitoring unit for communication, and the central control unit is configured to: when the physiological parameter obtained by the first monitoring unit exceeds a preset range, adjust the oxygen supply device to an intermittent oxygen supply mode to adjust the amount of oxygen provided by the oxygen supply device, thereby adjusting the oxygenation level. The present invention only needs to turn on and off the oxygen supply according to the patient's breathing stage, and does not need to set parameters such as oxygen flow or oxygen concentration multiple times.

Description

Technical Field

[0001] The present invention relates to the technical field of medical monitoring, and in particular to a breathing detection system. Background Art

[0002] Breathing is the process of gas exchange between the body and the external environment. It is a very important physiological process. Respiratory monitoring is an indispensable means. Monitoring respiratory changes can help understand changes in the respiratory function of the monitored person. For example, sleep apnea syndrome, respiratory arrest during sleep, hypoxia and even respiratory failure due to lack of oxygen in the body. For patients who need anesthesia and surgery, especially those with respiratory diseases, the assessment of respiratory function is particularly important. It can provide a reliable basis for the patient's condition and postoperative recovery and can promptly monitor whether the patient's condition has worsened.

[0003] In clinical treatment, oxygen therapy is usually used to correct different degrees of hypoxia caused by some diseases. Different diseases require different oxygen therapy strategies. For example, airway obstructive disease is a lung disease characterized by airflow limitation, especially chronic obstructive pulmonary disease (COPD). COPD has a high mortality rate and case fatality rate, which has placed a heavy burden on families and society. Long-term oxygen therapy is considered to be beneficial for the treatment of COPD patients after recovery. In addition, patients with acute respiratory distress syndrome (ARDS) and post-cardiopulmonary resuscitation (post-CPR) all require oxygen therapy.

[0004] The traditional oxygen therapy strategy is to maintain normal arterial oxygenation by increasing FiO2, and it is believed that too much oxygen is better than insufficient oxygen, ignoring the differences in the response of different individuals to oxygen. Excessive oxygen can easily cause oxygen toxicity and hyperoxia, which may also affect the patient's prognosis. There is increasing evidence that high oxygen is potentially harmful, such as increasing the incidence of organ failure.

[0005] Therefore, it is necessary to set oxygenation targets for patients undergoing oxygen therapy. Due to the patient's condition or individual differences, the optimal oxygenation target is uncertain. For patients with acute hypoxemic respiratory failure, the recommended oxygenation target is usually an arterial oxygen saturation of 88-95%, but in actual treatment, there is still a lack of a unified indicator for the patient's oxygenation target. Some studies have also proposed conservative oxygen therapy strategies in order to reduce the damage caused by hyperoxia, but conservative oxygen therapy may cause hypoxic damage and cannot improve the patient's prognosis. Therefore, it is necessary to continuously monitor the patient's oxygen therapy process and more comprehensively evaluate the patient's oxygenation level based on the monitoring parameters to adjust the patient's oxygen therapy strategy and minimize the damage to the patient caused by hyperoxia or hypoxia.

[0006] In actual use, the oxygen production equipment currently used usually manually adjusts the oxygen flow rate, and does not adjust itself according to the actual monitoring results of the user. Nursing staff are required to observe and adjust the user's oxygen inhalation process, which will cause inconvenience to nursing staff during nighttime monitoring and increase the workload of monitoring. When nursing staff neglect to observe, excessive oxygen therapy or hypoxia may occur; in addition, for patients with different degrees of hypoxia and carbon dioxide retention, their oxygen needs are also different, and there are also differences in oxygen requirements between individual patients. The current technology for blood gas monitoring is usually blood sampling analysis, which cannot be continuously monitored. Therefore, a system is needed that can monitor the patient's oxygen therapy process in real time and automatically adjust the oxygen therapy mode according to the patient's actual needs. Summary of the invention

[0007] In view of the shortcomings of the prior art, the present invention provides a breathing detection system, which can monitor the patient's oxygen therapy process in real time and automatically adjust the oxygen therapy mode according to the patient's actual needs. The breathing monitoring system includes a mask body, which is configured to cover at least part of the user's face to deliver oxygen to the user;

[0008] an oxygen supply device configured to provide oxygen to the user through the mask body;

[0009] A first monitoring unit configured to monitor a physiological parameter that changes along with a change in the partial pressure of carbon dioxide in the arterial blood of the user;

[0010] and a central control unit, wherein the central control unit is communicatively connected to the oxygen supply device and the first monitoring unit respectively, and is characterized in that:

[0011] The central control unit is configured to: when the physiological parameter acquired by the first monitoring unit exceeds a preset range, adjust the oxygen supply device to an intermittent oxygen supply mode to adjust the oxygen supply provided by the oxygen supply device, thereby adjusting the oxygenation level.

[0012] Preferably, the system further comprises: a second monitoring unit configured to monitor the breathing phase of the user, wherein the breathing phase comprises at least an exhalation phase and an inhalation phase of the user, and the central control unit is configured to control the oxygen supply device to supply oxygen to the user during the exhalation phase and / or the inhalation phase according to changes in the breathing phase.

[0013] Preferably, the central control unit is configured as follows:

[0014] When the physiological parameter exceeds the upper limit of the preset range and is less than the first preset value, the oxygen supply device is controlled to supply oxygen to the user in a first time period of the duration of the user's exhalation phase, and stops supplying oxygen in a second time period of the duration of the user's inhalation phase, wherein:

[0015] The first preset value is a reference value of the physiological parameter for determining whether the user's arterial blood carbon dioxide partial pressure is slightly elevated or severely elevated.

[0016] Preferably, the central control unit is configured as follows:

[0017] When the physiological parameter is greater than a first preset value, the oxygen supply device is controlled to supply oxygen to the user in a third time period lasting from the late exhalation stage to the late inhalation stage, and to stop supplying oxygen in a fourth time period lasting from the late inhalation stage to the late exhalation stage.

[0018] Preferably, the physiological parameters include at least breathing rate and heart rate.

[0019] Preferably, the oxygenation level is arterial blood oxygen saturation.

[0020] Preferably, the central control unit further comprises a calculation module, which is configured to obtain the duration of the exhalation phase and / or the inhalation phase of the user.

[0021] Preferably, the second monitoring unit is an electrocardiogram monitoring device.

[0022] Preferably, the second monitoring unit is communicatively connected to the central control unit to receive the ECG parameters of the second monitoring unit. Preferably, the ECG parameters refer to parameters that can reflect the ECG activity of the user. For example, the ECG monitor obtains the breathing waveform, ECG waveform, heart rate and other parameters after monitoring the user, and obtains the user's breathing stage through the ECG parameters.

[0023] Preferably, the first monitoring unit is a respiratory rate sensor.

[0024] In the present invention, physiological parameters refer to graphs or specific data monitored by the monitoring unit that can intuitively reflect the vital signs of the human body. For example, physiological parameters such as heart rate of 80 beats / min, blood pressure of 120 / 80 mmHg, and end-tidal carbon dioxide value of 35 mmHg. The preset range is the fluctuation range of the physiological parameters of the user specified by the doctor's order in the safe range. The first preset value is a reference value of the physiological parameter for judging whether the user's arterial carbon dioxide partial pressure is slightly elevated or severely elevated; or for judging mild carbon dioxide retention or more severe carbon dioxide retention.

[0025] The present invention also provides a mask, comprising at least a mask body, configured to deliver oxygen to a user in a manner that covers the user's nose and at least partially covers the user's mouth. The mask body can be in fluid communication with an externally provided conduit. The mask body can be in fluid communication with a monitoring device.

[0026] Preferably, the mask body at least comprises a gas storage portion, and the gas storage portion is arranged on the mask body in a manner adapted to the nose and mouth of the user.

[0027] Preferably, an oxygen supply port is provided below the gas storage portion. The gas storage portion is used to contain gas from the oxygen supply port and / or gas exhaled by the user.

[0028] Preferably, the mask body is provided with an exhalation hole. Preferably, the body is provided with a plurality of exhalation holes. The midline of the human face is taken as the midline of the mask body, and the exhalation holes are arranged on both sides of the midline of the mask body with the midline of the mask body as the dividing line.

[0029] According to a preferred embodiment, the exhalation hole is arranged above the oxygen supply port. The arrangement of the exhalation hole is conducive to releasing the exhaled gas of the user. Preferably, the exhalation hole center is arranged on both sides of the midline of the main body. The exhalation holes are arranged on both sides of the midline of the mask body in a manner surrounding the exhalation hole center.

[0030] According to a preferred embodiment, a detection port is also provided on the mask body. The detection port is provided with an adapter that can be connected to an external catheter or a monitoring device. Preferably, the monitoring device can be a sensor. Preferably, the monitoring device is configured to detect the concentration of carbon dioxide. Specifically, the sensor is an end-tidal ETCO2 sensor. The detection port includes a first detection port and a second detection port. The first detection port and the second detection port are respectively arranged on both sides of the main body with the center line of the main body as the dividing line. Preferably, the first detection port and the second detection port are respectively arranged at the center of the exhalation hole on both sides of the center line of the main body above the oxygen supply port.

[0031] Preferably, there is a first distance between the centers of the first detection port and the second detection port and the center of the oxygen supply port. Specifically, the first distance can be 0.5 to 3 cm.

[0032] Preferably, the detection system further comprises an alarm device, which sends out an alarm signal in response to the level of exhaled gas detected by the monitoring device exceeding a preset range.

[0033] Beneficial effects of the present invention: Currently, for the problem of carbon dioxide retention in type II respiratory failure, continuous low-flow oxygen inhalation is usually used to relieve symptoms. The present invention uses intermittent oxygen supply according to the patient's breathing stage to relieve symptoms, and the setting of the oxygen flow rate can be higher than the traditional oxygen flow rate. The advantage of such a setting is that oxygen is supplied during the patient's exhalation stage and stopped during the inhalation stage. The oxygen entering the mask uses its flow rate to blow the patient's exhaled gas to the exhalation holes on both sides of the face, helping to better discharge the exhaled gas accumulated in the mask. After the oxygen enters the mask and diffuses during the exhalation stage, its concentration will decrease. When it reaches the patient's inhalation stage, it can ensure that the final inhalation concentration will not be too high, and the patient's repeated inhalation of CO2 during the inhalation stage can be avoided as much as possible, ultimately achieving the purpose of improving ventilation and adjusting the oxygenation level to a level approved by the doctor. Especially for patients with shallow and fast exhalation, in the traditional oxygen therapy process, the CO2 exhaled by the patient is inhaled into the body again before being discharged. The present invention can solve this problem well. In addition, the present invention does not need to adjust the oxygen flow parameter or oxygen concentration multiple times, but adjusts the final oxygen concentration by the time period of intermittent oxygen supply. Compared with the intermittent oxygen supply mode of mild carbon dioxide retention, the intermittent oxygen supply mode of severe carbon dioxide retention adopts the third time period from the end of the exhalation stage to the end of the inhalation stage to supply oxygen to the user, and stops supplying oxygen in the fourth time period from the end of the inhalation stage to the end of the exhalation stage. Patients with mild carbon dioxide retention Unlike patients with severe carbon dioxide retention, the oxygen demand of the present invention only needs to turn on and off the oxygen supply according to the patient's breathing stage, and there is no need to set parameters such as oxygen flow rate or oxygen concentration. Different oxygen supply modes can use the same oxygen flow rate parameter setting. For the case of less oxygen demand, the mode of supplying oxygen in the exhalation stage and stopping oxygen supply in the inhalation stage is used to allow time for the oxygen entering the mask to diffuse so as to reduce the patient's final oxygen inhalation concentration. For the case of more oxygen demand, oxygen supply is adopted in the late exhalation stage until the oxygen supply is stopped in the late inhalation stage to ensure the patient's oxygen intake. In addition, according to the individual breathing differences of the patient, the breathing detection system can set a breathing mode suitable for the patient to achieve a better oxygen therapy effect.

[0034] In the prior art, the oxygenation target for patients undergoing oxygen therapy is usually set based on the oxygenation target that is theoretically suitable for the patient, without taking into account individual differences or differences in the condition of the patient. Based on individual differences or differences in the condition of the patient, the differences in the response of different individuals to oxygen are ignored during the oxygen therapy process. The oxygenation target that is theoretically suitable for the patient may be higher or lower than the oxygenation target actually required by the patient during actual use. That is, setting the theoretical oxygenation target as the patient's actual oxygenation target may cause the patient to be over-oxygenated or hypoxic, which is not conducive to the patient's recovery. Based on the monitoring of the patient's actual oxygen therapy process, the present invention can adjust the patient's oxygenation target and set an oxygenation target suitable for the patient in a targeted manner. In addition, continuous oxygen inhalation or long-term high-concentration oxygen inhalation will cause damage to the body. In the present invention, when the oxygenation target suitable for the patient is reached and each physiological parameter is within a preset range, the oxygen supply device stops supplying oxygen, but the monitoring unit continues to monitor the patient's vital signs. When the oxygen supply is stopped, the patient can maintain normal vital signs and does not need to continue to inhale oxygen; when the oxygen supply is stopped, if the patient has varying degrees of hypoxia, oxygen continues to be supplied to the patient, and a suitable oxygen supply mode is selected to supply oxygen to the patient. Compared with the detection system of the prior art, the advantages of the present invention are: overcoming the defect of supplying oxygen to patients according to theoretical oxygenation targets in oxygen therapy in the past, selecting an oxygen therapy strategy suitable for the patient according to individual differences and differences in the condition of the patient when performing oxygen therapy on the patient, and because oxygen therapy is usually performed for a long time, the present invention can avoid the harm to the patient caused by only relying on theoretical oxygenation targets and theoretical oxygen therapy strategies during oxygen therapy. Past studies have shown that in the treatment of critically ill patients in the ICU, both low oxygenation targets and high oxygenation targets will increase the mortality rate, especially when the arterial oxygen saturation exceeds the specified oxygen therapy target. For every 1% increase in the oxygenation target, the patient's mortality rate increases accordingly. High oxygen or low oxygen in oxygen therapy will affect the patient's prognosis. Therefore, the present invention sets oxygenation targets for patients in a targeted manner and provides an oxygen supply mode suitable for patients according to their actual conditions, which is significantly superior to the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram of a mask according to a preferred embodiment of the present invention;

[0036] Figure 2 is a simplified schematic diagram of a telescopic portion of a mask according to a preferred embodiment of the present invention;

[0037] Figure 3 It is a simplified connection diagram of a breathing detection system according to a preferred embodiment of the present invention.

[0038] Reference numerals list

[0039] 100: mask body; 110: gas storage part; 120: oxygen supply port; 130: detection port; 131: first detection port; 132: second detection port; 140: exhalation hole; 141: exhalation hole center; 150: telescopic part; 151: adhesive part; 160: belt part; 200: oxygen supply device; 300: first monitoring unit; 400: second monitoring unit; 500: central control unit; 510: computing module; 600: oxygen duct. DETAILED DESCRIPTION

[0040] The following is a detailed description with reference to the accompanying drawings.

[0041] It should be noted that the terms "upper", "lower", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the invention, it should be noted that, unless otherwise clearly specified and defined, the terms "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. "Several" means two or more, unless otherwise clearly and specifically defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Example 1

[0043] This embodiment provides a mask, such as Figure 1As shown, it includes a mask body 100, which can cover the nose and at least part of the mouth of the user. The mask is used to deliver oxygen to the user. The mask body 100 can be in fluid communication with a conduit provided externally. The mask body 100 includes at least a gas storage portion 110. The gas storage portion 110 provides space for the nose and mouth and allows the exhaled gas and the incoming gas to mix here. The gas storage portion 110 is arranged on the mask body 100 in a manner adapted to the nose and mouth of the user to facilitate the patient's breathing. Preferably, the gas storage portion 110 extends from the horizontal line where the mouth is located to the horizontal line where the nose is located. An oxygen supply port 120 is arranged below the gas storage portion 110. The gas storage portion 110 is used to accommodate gas from the oxygen supply port 120 and / or gas exhaled by the user. When supplying oxygen to the user, the distal end of the conduit is connected to the oxygen supply port 120, and the proximal end of the conduit is connected to the oxygen supply device 200. Preferably, the oxygen supply device 200 is a central oxygen supply device for a hospital. Preferably, the oxygen supply device 200 is an oxygen cylinder. Preferably, the oxygen supply device 200 is an oxygen storage tank.

[0044] In this embodiment, a detection port 130 is also provided on the mask body 100. The detection port 130 is provided with an adapter that can be connected to an external catheter or a monitoring device. Preferably, the monitoring device can be a sensor. Preferably, the monitoring device is configured to detect the concentration or partial pressure of carbon dioxide. Specifically, the monitoring device is an end-tidal ETCO2 sensor. The end-tidal ETCO2 sensor is connected to the detection port 130 to detect the concentration of carbon dioxide exhaled by the user. Preferably, the monitoring device is configured to detect the partial pressure of carbon dioxide. The detection port 130 includes a first detection port 131 and a second detection port 132. Specifically, the monitoring device can be an infrared sensor or a colorimetric sensor. The first detection port 131 and the second detection port 132 are respectively arranged on both sides of the mask body 100 with the center line of the mask body 100 as the dividing line. Preferably, the distal end of the external catheter is connected to only one of the detection ports. Preferably, the distal end of the external catheter can be connected to the first detection port 131. Preferably, the distal end of the external catheter can be connected to the second detection port 132.

[0045] Preferably, there is a first distance between the center of the detection port 130 and the center of the oxygen supply port 120. Preferably, there is a first distance between the first detection port 131 and the center of the oxygen supply port 120. Preferably, there is a first distance between the second detection port 132 and the center of the oxygen supply port 120. Specifically, the first distance can be 0.5 to 3 cm.

[0046] According to a preferred embodiment, at least one exhalation hole 140 is provided on the mask body 100. The exhalation hole 140 allows the gas or other substances inside the mask body 100 to be discharged to the outside of the mask body 100. The gas can be carbon dioxide, oxygen, etc. Preferably, a plurality of exhalation holes 140 are provided on the mask body 100. The plurality of exhalation holes 140 are arranged on both sides of the midline of the mask body 100 with the midline of the mask body 100 as the dividing line. According to a preferred embodiment, the exhalation hole 140 is arranged above the oxygen supply port 120. The arrangement of the exhalation hole 140 is conducive to releasing the exhaled gas of the user. Preferably, the exhalation hole center 141 is respectively arranged on both sides of the midline of the mask body 100. The exhalation holes 140 are respectively arranged on both sides of the midline of the mask body 100 in a manner of surrounding the exhalation hole center 141. The detection port 130 can be arranged on the mask body 100 adjacent to the exhalation hole 140. Preferably, a plurality of exhalation holes 140 are arranged on the mask body 100 in a manner of surrounding the detection port 130. Preferably, the center of the detection port 130 is located in the center of the exhalation hole 140. Preferably, a plurality of exhalation holes 140 are arranged on one side of the midline of the mask body 100 in a manner of surrounding the first detection port 131. Preferably, a plurality of exhalation holes 140 are arranged on the other side of the midline of the mask body 100 opposite to the first detection port 131 in a manner of surrounding the second detection port 132. Preferably, the detection port 130 is outside the area surrounded by the plurality of exhalation holes 140. Specifically, the center of the detection port 130 is 0.5 to 3 cm away from the exhalation hole 140, and the center of the detection port 130 is 0.5 to 3 cm away from the center of the exhalation hole 141.

[0047] Preferably, the exhalation hole 140 is connected to the flexible membrane to form a one-way air-permeable valve. The one-way air-permeable valve allows the gas inside the mask body 100 to be discharged to the outside of the mask body 100. The one-way air-permeable valve does not allow the gas outside the mask body 100 to enter the inside of the mask body 100. Preferably, the one-way air-permeable valve provided in this embodiment is a valve of various types that allows gas to flow in one direction. Preferably, the one-way air-permeable valve is integrally formed with the mask body 100. Preferably, the one-way air-permeable valve is a single component independent of the mask body 100. When the gas flows out from the inside of the mask body 100 through the one-way air valve, the exhalation hole 140 has a small resistance to the outflowing gas. The advantage of setting the detection port 130 at a position close to the exhalation hole 140 is that when the patient's exhaled gas is detected through the detection port 130, there is less or no interference from other gases. For example, there is no interference from the entry of external air or the input of oxygen, and the result is more accurate. When the detection port 130 is set close to the oxygen supply port 120, the oxygen input into the mask body 100 by the oxygen supply device 200 will interfere with the exhaled gas of the detection port 130, making the detection result inaccurate. For example, a low level of carbon dioxide and a high amount of oxygen may be detected, causing medical staff to misjudge the patient's condition.

[0048] Preferably, the mask is removably connected to the user's face in a manner that a sealed cavity can be formed with the user's face. The advantage of such a configuration is that the gas is stored in the sealed cavity, the oxygen concentration is stable, and changes in breathing patterns do not change the inhaled oxygen concentration. According to a preferred embodiment, the detection port 130 is provided in the gas storage portion 110.

[0049] Preferably, the mask body 100 can be in fluid communication with the monitoring device. The mask body 100 also includes a cap disposed on the detection port 130. Preferably, the cap is removably connected to the detection port 130. Preferably, the cap is used to seal the sensor port of the anesthesia ventilator. Preferably, a first cap is disposed on the first detection port 131. Preferably, a second cap is disposed on the second detection port 132. In the anesthesia breathing circuit, after removing the first cap on the first detection port 131, the sensor port is exposed after removing the catheter from the sensor on the anesthesia breathing circuit, the removed first cap is connected to the sensor port, thereby closing the sensor port, and then the catheter is connected to the exposed first detection port 131.

[0050] Preferably, the detection system further comprises a conduit connected to the detection port 130, an oxygen conduit 600 connected to the oxygen supply port 120, an oxygen supply device 200, and a sensor. The conduit is used to deliver the user's exhaled gas to the monitoring device. The oxygen conduit 600 is used to deliver the oxygen from the oxygen supply device 200 to the mask to provide oxygen to the user.

[0051] Preferably, the mask body 100 includes a first connector that connects the conduit to the detection port 130. Specifically, the first connector is configured to be able to perform rotational movement with at least two degrees of freedom relative to the detection port 130 when connected to the detection port 130. Specifically, the first connector is configured to be able to perform rotational movement with at least two degrees of freedom when connected to the conduit.

[0052] Preferably, the mask body 100 includes a second connector that connects the oxygen conduit 600 to the oxygen supply port 120. Specifically, the second connector is configured to be able to perform rotational movement with at least two degrees of freedom relative to the oxygen supply port 120 when connected to the oxygen supply port 120. Specifically, the second connector is configured to be able to perform rotational movement with at least two degrees of freedom when connected to the oxygen conduit 600.

[0053] Preferably, when the catheter is connected to the first connector, at least a portion of the catheter can move along with the movement of the first connector.

[0054] Preferably, when the oxygen conduit 600 is connected to the second connecting member, at least a portion of the oxygen conduit 600 can move along with the movement of the second connecting member.

[0055] Preferably, the first connecting member cooperates with an adapter provided on the detection port 130 to connect the catheter to the detection port 130 in a stable and sealed manner.

[0056] Preferably, the first connecting member has an opening for allowing gas to pass therethrough.

[0057] Preferably, the mask body 100 includes a retaining member that retains at least one of the connector and the conduit in a preferred position recognized by a medical professional.

[0058] Preferably, the catheter is provided with a rigid part. The rigid part has a greater hardness than other parts of the catheter. Specifically, the rigid part is about 4 to 5 cm away from the first connecting member.

[0059] Preferably, the mask body 100 is made of a fire-resistant material. For example, the mask body 100 can be made of a polyvinyl fluoride material.

[0060] Preferably, the two side edges of the mask body 100 are provided with belt portions 160 for holding the mask body 100 in a suitable position on the user's face. The belt portion 160 holds the mask body 100 on the user's face in a manner of wrapping around the user's head.

[0061] Preferably, the mask body 100 is removably attached to the user's face by an adhesive material.

[0062] According to a preferred embodiment, the mask body 100 is provided with a telescopic portion 150, such as Figure 2As shown. Preferably, the telescopic part 150 is configured as a corrugated strip. The material of the telescopic part 150 is silicone. The telescopic part 150 is respectively arranged on both sides of the mask body 100 with the center line of the mask body 100 as the dividing line. The telescopic part 150 has the center line of the mask body 100 as its extension direction. Preferably, the telescopic part 150 is arranged on both sides away from the center line of the mask body 100 adjacent to the first detection port 131 and the second detection port 132. According to a preferred embodiment, adhesive members 151 are provided on both sides of the telescopic part 150. The adhesive member 151 keeps the telescopic part 150 at its original size. When the mask body 100 needs to be enlarged, the adhesive members 151 on both sides of the telescopic part 150 are separated so that the telescopic part 150 is unfolded, thereby increasing the coverage area of ​​the mask body 100. When the original size of the mask body 100 needs to be restored, the adhesive pieces 151 on both sides of the telescopic part 150 are pressed together to change the telescopic part 150 from the expanded state to the compressed state. The size of the mask used in clinical treatment is fixed. Due to individual differences, masks of the same specifications cannot meet the needs of different patients. Therefore, the added telescopic part 150 can adjust the size of the mask to meet the needs of different types of users.

[0063] Example 2

[0064] This embodiment is an improvement on Embodiment 1, and the repeated contents are not repeated here.

[0065] This embodiment provides a breathing detection system. The breathing detection system includes at least a mask body 100, a monitoring device, and an oxygen supply device 200. The breathing detection system can supply oxygen to the user and detect the user's exhaled gas through the detection port 130. In clinical treatment, it can be used for patients who need auxiliary oxygen supply, such as oxygen supply and breathing monitoring for patients after surgery to ensure that the patient is in a normal breathing state. When the patient has abnormal breathing, medical staff can promptly detect the patient's abnormal condition and quickly take emergency measures.

[0066] like Figure 1 As shown, the mask body 100 has one or two detection ports 130, and the detection ports 130 are arranged between the horizontal line of the nose and the horizontal line of the mouth. The two detection ports 130 can meet the use needs of most patients. On the one hand, when the patient is in different lying positions such as supine or side-lying, since the detection ports 130 are arranged on both sides of the mask body 100, the detection ports 130 can be connected from a more convenient side, or the two detection ports 130 can be used for different purposes. Medical staff can perform different sampling tests through the two detection ports 130 during the physical examination of the patient; on the other hand, the mask body 100 can be used for oxygen supply and monitoring of the patient's breathing at the same time, such as respiratory support and respiratory monitoring for anesthetized patients, ICU critically ill patients, and respiratory patients, so as to timely detect dangerous situations such as insufficient ventilation, respiratory depression, and airway obstruction.

[0067] Preferably, the first detection port 131 and the second detection port 132 on both sides of the midline of the mask body 100 can be arranged symmetrically or asymmetrically. When the mask body 100 is worn at an appropriate position on the patient's face, the detection port 130 can be located above the horizontal line where the patient's upper lip is located. The detection port 130 can collect gas exhaled from the patient's nose and / or mouth. The detection port 130 can also collect other gases, such as oxygen provided by the oxygen supply device 200, indoor air, etc.

[0068] Preferably, the detection port 130 can be disposed at a position between the nose and the mouth.

[0069] According to a preferred embodiment, the detection port 130 is arranged on both sides of the midline of the mask body 100 and at a position higher than the oxygen supply port 120. In particular, during surgery, the anesthesiologist operates at the bedside of the patient. When the detection port 130 is arranged adjacent to the oxygen supply port 120, it is not conducive to the operation of the anesthesiologist. This is because the detection port 130 will be outside the field of vision of the anesthesiologist. In addition, the anesthesiologist needs to pass over the patient's face to connect the catheter to the detection port 130. When the anesthesiologist's arm passes over the patient's face, it will approach and block the patient's eyes or other sensitive parts, which is easy to cause panic in the patient. When the detection port 130 is arranged on both sides of the midline of the mask body 100, the anesthesiologist can choose to connect the detection port 130 to the monitoring device according to the convenience of operation. The position of the detection port 130 is fully exposed to the field of vision of the anesthesiologist, so it is convenient for the anesthesiologist to operate.

[0070] The separation of the oxygen supply port 120 and the detection port 130 can reduce interference with sampling at the detection port 130. The conduit connected to the detection port 130 and the oxygen conduit 600 connected to the oxygen supply port 120 do not interfere with each other.

[0071] The detection port 130 is provided with an adapter to interfere with the catheter. Specifically, the adapter of the detection port 130 is a male Luer connector, and the distal end of the catheter is a female Luer connector that matches it.

[0072] The detection port 130 on one side of the mask body 100 is selected. In this embodiment, the first detection port 131 is taken as an example. The distal end of the catheter is connected to the first detection port 131, and the proximal end of the catheter is connected to the sensor. The gas exhaled by the user enters the catheter through the first detection port 131 and finally enters the sensor. The sensor detects the exhaled gas of the user. In this embodiment, the gas exhaled by the user refers to carbon dioxide. The sensor is a carbon dioxide sensor. The carbon dioxide sensor detects the partial pressure of carbon dioxide exhaled by the user.

[0073] The detection system also includes an alarm device. Preferably, the alarm device can be a sound alarm. In response to the level of exhaled gas detected by the monitoring device exceeding a preset range, the alarm device sends an alarm signal. For example, when the end-tidal carbon dioxide value is monitored to exceed 35-45 mmHg, the alarm device sends a sound prompt.

[0074] Preferably, the gas exhaled by the user is discharged from the mask through the exhalation hole 140. Specifically, the gas exhaled by the user in the nebulization therapy or aerosol therapy is discharged from the mask through the exhalation hole 140. Preferably, the gas exhaled by the user is discharged from the mask through the one-way valve.

[0075] The oxygen supply device 200 delivers oxygen to the oxygen supply port 120 through the oxygen conduit 600 to provide the patient with oxygen of suitable concentration. Preferably, the provided oxygen concentration can be 21% to 100%. The flow rate of oxygen can be set to low flow, medium flow or high flow according to the patient's condition.

[0076] Example 3

[0077] Oxygen inhalation therapy is one of the most commonly used treatment methods in hospitals. For example, critically ill patients and other patients with respiratory diseases all need oxygen therapy. Due to the differences in the conditions of different patients, their oxygen partial pressure targets are different. Not all patients need to correct the arterial oxygen partial pressure (Pa02) to 80-100 mmHg and the blood oxygen saturation to 95% to 100% during oxygen therapy. In addition, although oxygen therapy is an indispensable means in the clinical treatment process, there may be uncorrected hypoxia or excessive oxygen therapy during oxygen therapy. For different patients, doctors usually set a theoretically appropriate oxygenation target for the patient based on past clinical experience. However, due to individual differences in patients, their reactions to oxygen are different, and the theoretically appropriate oxygenation target may not be the optimal oxygenation target for the patient. The current oxygen therapy process has a low degree of automation and requires manual monitoring, which increases the workload of medical staff. In the case of negligence in manual monitoring, hypoxia or excessive oxygen therapy cannot be discovered in time and causes damage to the patient's body. Therefore, this embodiment provides a respiratory monitoring system to establish a suitable oxygenation target and oxygen therapy strategy for the patient based on the real-time monitoring parameters of the patient.

[0078] The present embodiment provides a breathing detection system, which at least includes a monitoring device, a central control unit 500, and an oxygen supply device 200. The central control unit 500 is respectively connected in communication with the monitoring unit and the oxygen supply device 200 so that the detection system can work in coordination. Preferably, the monitoring unit includes at least an electrocardiogram monitor, a blood oxygen sensor, and an end-tidal carbon dioxide monitor. Preferably, the central control unit 500 is connected in communication with the patient's medical record database. The blood oxygen monitoring unit is used to monitor the patient's dynamic blood oxygen value, pulse rate, body temperature and other physiological parameters.

[0079] Studies have shown that in the treatment of critically ill patients in the ICU, both low and high oxygenation targets will increase mortality, especially when the arterial oxygen saturation exceeds the target of oxygen therapy. For every 1% increase in the oxygenation target, the patient's mortality rate increases. In addition, the mortality rate of critically ill patients receiving conservative oxygen therapy is nearly 10% lower than that of critically ill patients receiving active oxygen therapy, and the incidence of shock and liver failure is lower. The oxygen dose and duration of oxygen therapy vary according to the patient's condition. Therefore, establishing appropriate oxygenation targets and oxygen delivery strategies for patients can ensure the effectiveness of oxygen therapy and bring better prognosis to patients.

[0080] This embodiment takes ICU critically ill patients as an example to illustrate the working principle of the respiratory detection system. The central control unit 500 retrieves the treatment information of the corresponding patient from the patient case library. Preferably, the treatment information includes at least the department to which the patient belongs, the surgical history, the doctor's order information, etc. Preferably, the patient can be a patient with acute hypoxemia respiratory failure among critically ill patients in the ICU. The doctor's order information is provided with a first oxygenation target, a second oxygenation target, and a third oxygenation target for the patient. According to a preferred embodiment, the first oxygenation target is the theoretical optimal oxygenation target for this type of patient. The second oxygenation target is greater than the first oxygenation target. The second oxygenation target is configured as: when the patient is judged by the central control unit 500 to be in a hypoxic state under the first oxygenation target, the central control unit 500 determines the actual oxygenation target suitable for the patient. The third oxygenation target is less than the first oxygenation target and not less than 90%. The third oxygenation target is configured as: when the patient is judged by the central control unit 500 to be in excessive oxygen therapy under the first oxygenation target, the central control unit 500 determines the actual oxygenation target suitable for the patient. Preferably, the first oxygenation target in the patient's medical order information is an arterial oxygen saturation of 94-96%. Preferably, the second oxygenation target in the medical order information is an arterial oxygen saturation of 97%. Preferably, the third oxygenation target in the medical order information is an arterial oxygen saturation of 90-93%. When the patient undergoes oxygen therapy, the central control unit 500 controls the oxygen supply mode according to the medical order information. Preferably, the oxygen supply device 200 is provided with a first oxygen supply mode, a second oxygen supply mode, and a third oxygen supply mode. Preferably, the first oxygen supply mode is a continuous high-concentration oxygen supply. Preferably, the second oxygen supply mode is a continuous oxygen supply mode with an oxygen concentration higher than that of the first oxygen supply mode. Preferably, the third oxygen supply mode is an intermittent low-concentration oxygen supply. Specifically, the oxygen therapy concentration of the first oxygen supply mode is set to 45%. Specifically, the oxygen therapy concentration of the second oxygen supply mode is set to 50%. Specifically, the oxygen therapy concentration of the third oxygen supply mode is set to 30%. The central control unit 500 first controls the oxygen supply device 200 according to the patient's medical order information. Preferably, the central control unit 500 controls the oxygen supply device 200 to perform oxygen therapy for the patient in the first oxygen supply mode according to the first oxygenation target. Preferably, the oxygen supply device 200 can be a ventilator. Preferably, the oxygen supply device 200 can be an oxygen cylinder. The blood oxygen sensor, the respiratory rate sensor, and the blood gas analysis unit feed back the patient's physiological parameters during oxygen therapy to the central control unit 500 in real time. The central control unit 500 adjusts the patient's oxygenation target and oxygen therapy strategy according to the actual physiological parameters of the patient during oxygen therapy.

[0081] In this embodiment, the central control unit 500 is configured as follows:

[0082] The central control unit 500 first sets the first oxygenation target as the oxygenation target of the patient, and the central control unit 500 controls the oxygen supply device 200 to supply oxygen to the patient in the first oxygen supply mode, for example, the first oxygen supply mode is a continuous oxygen supply mode with an oxygen concentration of 45%. The blood oxygen sensor monitors the patient's blood oxygen saturation and feeds back the monitored blood oxygen saturation parameters to the central control unit 500. The blood oxygen sensor is connected in communication with the central control unit 500. The respiratory rate sensor monitors the patient's respiratory rate and feeds back the monitored respiratory rate parameters to the central control unit 500. The respiratory rate sensor is connected in communication with the central control unit 500. The arterial oxygen partial pressure of the patient is obtained through the blood gas analysis unit and the arterial oxygen partial pressure parameters are fed back to the central control unit 500. The blood gas analysis unit is used to monitor the arterial oxygen partial pressure parameters.

[0083] When the central control unit 500 receives that the patient's blood oxygen saturation reaches the first oxygenation target, that is, the arterial blood oxygen saturation is 94-96%, and at the same time monitors that the patient's heart rate is 60-100 times / min, the respiratory rate is 12-20 / min, and the arterial blood oxygen partial pressure is 60-80 mmHg, the central control unit 500 determines that the patient is mildly hypoxic under the first oxygenation target, and the central control unit 500 sets the second oxygenation target as the patient's oxygenation target. The central control unit 500 controls the oxygen supply device 200 to supply oxygen to the patient in the second oxygen supply mode. When the central control unit 500 monitors that the patient's blood oxygen saturation reaches the second oxygenation target, that is, 97%, and at the same time other physiological parameters are within the preset range, that is, the heart rate is 60-100 times / min, the respiratory rate is 12-20 / min, and the arterial blood oxygen partial pressure is 80-100 mmHg, the central control unit 500 determines that the patient is in a normal physiological condition, and the central control unit 500 controls the oxygen supply device 200 to stop supplying oxygen, and the blood oxygen sensor, the respiratory rate sensor, and the blood gas analysis unit continue to monitor the patient's condition.

[0084] After stopping the oxygen supply, if the central control unit 500 monitors that the patient's blood oxygen saturation is maintained at the second oxygenation target, that is, at 97%, and other physiological parameters are within the preset range, that is, the heart rate is 60-100 times / min, the respiratory rate is 12-20 times / min, and the arterial oxygen partial pressure is 80-100 mmHg, it is judged that the patient is in a normal physiological condition, and the central control unit 500 does not turn on the oxygen supply device 200.

[0085] After stopping the oxygen supply, if the central control unit 500 monitors that the patient's blood oxygen saturation is lower than the second oxygenation target, at 90-96%, and some physiological parameters fluctuate around the preset range, such as arterial oxygen partial pressure of 75-79 mmHg, heart rate of 60-100 times / min, and respiratory rate of 12-20 times / min, the central control unit 500 determines that the patient is mildly hypoxic, and the central control unit 500 controls the oxygen supply device 200 to start and supply oxygen to the patient in the third oxygen supply mode. Specifically, the third oxygen supply mode is an oxygen concentration of 30%, and oxygen is supplied to the patient at intervals every half hour or every hour until all physiological parameters return to the preset range.

[0086] After stopping the oxygen supply, if the central control unit 500 detects that the patient's blood oxygen saturation drops to 60-80%, the heart rate is 110-120 times / min, the respiratory rate is 25-30 times / min, and the arterial blood oxygen partial pressure is 50-60 mmHg, the central control unit 500 determines that the patient has moderate hypoxia, and the central control unit 500 controls the oxygen supply device 200 to start, and supplies oxygen to the patient in the first oxygen supply mode until the venous blood oxygen partial pressure returns to the preset range. Specifically, the first oxygen supply mode is a continuous oxygen supply mode with an oxygen concentration of 45%.

[0087] After stopping the oxygen supply, if the central control unit 500 detects that the patient's blood oxygen saturation is lower than 60%, the heart rate is greater than 130 times / min, the respiratory rate is 30-40 times / min, and the arterial blood oxygen partial pressure is 40-50 mmHg, the central control unit 500 determines that the patient has severe hypoxia, and the central control unit 500 controls the oxygen supply device 200 to start, and supplies oxygen to the patient in the second oxygen supply mode until the venous blood oxygen partial pressure returns to the preset range. Specifically, the second oxygen supply mode is a continuous oxygen supply mode with an oxygen concentration of 50%.

[0088] The central control unit 500 controls the oxygen supply device 200 to supply oxygen to the patient in a first oxygen supply mode, such as a continuous oxygen supply mode with an oxygen concentration of 45%. When the central control unit 500 receives that the patient's blood oxygen saturation reaches the first oxygenation target, i.e., 94-96%, the heart rate is 60-100 times / min, the respiratory rate is 12-20 / min, and the arterial oxygen partial pressure exceeds 100 mmHg, the central control unit 500 determines that the patient is in an over-oxygen therapy state under the first oxygenation target, and the central control unit 500 sets the third oxygenation target as the patient's oxygenation target. The central control unit 500 controls the oxygen supply device 200 to supply oxygen to the patient in the third oxygen supply mode. When the central control unit 500 monitors that the patient's blood oxygen saturation reaches the third oxygenation target, i.e., 90-93%, and other physiological parameters are within the preset range, i.e., the heart rate is 60-100 times / min, the respiratory rate is 12-20 / min, and the arterial oxygen partial pressure is 80-100 mmHg, the central control unit 500 determines that the patient is in a normal physiological condition, and the central control unit 500 controls the oxygen supply device 200 to stop supplying oxygen, and the blood oxygen sensor, the respiratory rate sensor, and the blood gas analysis unit continue to monitor the patient's condition.

[0089] After stopping the oxygen supply, if the central control unit 500 monitors that the patient's blood oxygen saturation is maintained at 90-93%, and other physiological parameters are within the preset range, that is, the heart rate is 60-100 times / min, the respiratory rate is 12-20 / min, and the arterial oxygen partial pressure is 80-100 mmHg, the central control unit 500 will not turn on the oxygen supply device 200.

[0090] After stopping the oxygen supply, if the central control unit 500 monitors that the patient's blood oxygen saturation is between 80% and 89%, and some physiological parameters fluctuate around the preset range, such as arterial oxygen partial pressure of 75-79 mmHg, heart rate of 60-100 times / min, and respiratory rate of 12-20 / min, the central control unit 500 determines that the patient has mild hypoxia, and the central control unit 500 controls the oxygen supply device 200 to start and supply oxygen to the patient in the third oxygen supply mode. Specifically, the third oxygen supply mode is an oxygen concentration of 30%, with an intermittent oxygen supply mode every half hour or every hour.

[0091] After stopping the oxygen supply, if the central control unit 500 detects that the patient's blood oxygen saturation drops to 60-80%, the heart rate is 110-120 times / min, the respiratory rate is 25-30 / min, and the arterial blood oxygen partial pressure is 50-60 mmHg, the central control unit 500 determines that the patient has moderate hypoxia, and the central control unit 500 controls the oxygen supply device 200 to start, and supplies oxygen to the patient in the first oxygen supply mode until the venous blood oxygen partial pressure returns to the preset range. Specifically, the first oxygen supply mode is a continuous oxygen supply mode with an oxygen concentration of 45%.

[0092] After stopping the oxygen supply, if the central control unit 500 detects that the patient's blood oxygen saturation is lower than 60%, the heart rate is greater than 130 times / min, the respiratory rate is 30-40 / min, and the arterial blood oxygen partial pressure is 40-50 mmHg, the central control unit 500 determines that the patient has severe hypoxia, and the central control unit 500 controls the oxygen supply device 200 to start, and supplies oxygen to the patient in the second oxygen supply mode until the venous blood oxygen partial pressure returns to the preset range. Specifically, the second oxygen supply mode is a continuous oxygen supply mode with an oxygen concentration of 50%.

[0093] The central control unit 500 controls the oxygen supply device 200 to supply oxygen to the patient in a first oxygen supply mode, such as a continuous oxygen supply mode with an oxygen concentration of 45%. When the central control unit 500 receives that the patient's blood oxygen saturation reaches the first oxygenation target, i.e., 94-96%, and other physiological parameters are within the preset range, i.e., the heart rate is 60-100 times / min, the respiratory rate is 12-20 / min, and the arterial oxygen partial pressure is 80-100 mmHg, the central control unit 500 controls the oxygen supply device 200 to stop supplying oxygen, and the blood oxygen sensor, the respiratory rate sensor, and the blood gas analysis unit continue to monitor the patient's condition.

[0094] After stopping the oxygen supply, if the central control unit 500 monitors that the patient's blood oxygen saturation is maintained at 94-96%, and other physiological parameters are within the preset range, that is, the heart rate is 60-100 times / min, the respiratory rate is 12-20 / min, and the arterial oxygen partial pressure is 80-100 mmHg, the central control unit 500 will not turn on the oxygen supply device 200.

[0095] After stopping the oxygen supply, if the central control unit 500 monitors that the patient's blood oxygen saturation is between 80% and 89%, and some physiological parameters fluctuate around the preset range, such as arterial oxygen partial pressure of 75-79 mmHg, heart rate of 60-100 times / min, and respiratory rate of 12-20 / min, the central control unit 500 determines that the patient has mild hypoxia, and the central control unit 500 controls the oxygen supply device 200 to start and supply oxygen to the patient in the third oxygen supply mode. Specifically, the third oxygen supply mode is an oxygen concentration of 30%, with an intermittent oxygen supply mode every half hour or every hour.

[0096] After stopping the oxygen supply, if the central control unit 500 detects that the patient's blood oxygen saturation drops to 60-80%, the heart rate is 110-120 times / min, the respiratory rate is 25-30 / min, and the arterial blood oxygen partial pressure is 50-60 mmHg, the central control unit 500 determines that the patient has moderate hypoxia, and the central control unit 500 controls the oxygen supply device 200 to start, and supplies oxygen to the patient in the first oxygen supply mode until the venous blood oxygen partial pressure returns to the preset range. Specifically, the first oxygen supply mode is a continuous oxygen supply mode with an oxygen concentration of 45%.

[0097] After stopping the oxygen supply, if the central control unit 500 detects that the patient's blood oxygen saturation is lower than 60%, the heart rate is greater than 130 times / min, the respiratory rate is 30-40 / min, and the arterial blood oxygen partial pressure is 40-50 mmHg, the central control unit 500 determines that the patient has severe hypoxia, and the central control unit 500 controls the oxygen supply device 200 to start, and supplies oxygen to the patient in the second oxygen supply mode until the venous blood oxygen partial pressure returns to the preset range. Specifically, the second oxygen supply mode is a continuous oxygen supply mode with an oxygen concentration of 50%.

[0098] Example 4

[0099] At present, the determination of arterial carbon dioxide partial pressure requires the extraction of patient blood samples and offline laboratory analysis. The information about arterial carbon dioxide provided by the blood sampling method is delayed and only intermittently available. In this embodiment, the change of arterial carbon dioxide partial pressure is judged by monitoring the physiological parameters that change with the change of arterial carbon dioxide partial pressure, so as to achieve the purpose of continuously monitoring arterial carbon dioxide partial pressure, wherein the physiological parameters that change with the change of arterial carbon dioxide partial pressure include at least respiratory rate, heart rate, blood pressure, etc. This embodiment uses the monitoring of respiratory rate and heart rate as an example to illustrate the work of the respiratory detection system. In type II respiratory failure, the pulmonary ventilation and (or) gas exchange function is severely impaired, so that effective gas exchange cannot be carried out, resulting in hypoxia with or without carbon dioxide retention. Figure 3 is a schematic diagram of this embodiment.

[0100] When supplying oxygen, the oxygen flow rate is set to 3-4 L / min, and the concentration is controlled within 30%. The following possible situations exist during the monitoring process: the patient's respiratory rate and heart rate exceed the upper limit of the preset range but are less than the first preset value, and the central control unit 500 determines that the patient has mild hypoxia with carbon dioxide retention. The central control unit 500 controls the oxygen supply device 200 to supply oxygen in an oxygen mode opposite to the patient's breathing phase to dilute the concentration of carbon dioxide exhaled by the patient to increase the oxygen content.

[0101] For example, the first preset value is set to 30 breathing times and 120 heart rate per minute.

[0102] When the patient's respiratory rate is monitored to be 25 and the heart rate is 110 beats / min, it is judged as slight carbon dioxide retention. The central control unit 500 controls the oxygen supply mode of the oxygen supply device 200 to supply oxygen to the user during the first time period of the duration of the user's exhalation phase, and stop supplying oxygen during the second time period of the duration of the user's inhalation phase, so that the arterial oxygen saturation reaches 88-92%.

[0103] At present, for the problem of carbon dioxide retention in type II respiratory failure, continuous low-flow oxygen inhalation is usually used to relieve symptoms. This embodiment uses intermittent oxygen supply according to the patient's breathing stage to relieve symptoms, and the setting of the oxygen flow rate can be slightly higher than the traditional oxygen flow rate. The advantage of this setting is that oxygen is supplied during the patient's exhalation stage and stopped during the inhalation stage. The oxygen entering the mask uses its flow rate to blow the patient's exhaled gas to the exhalation holes 140 on both sides of the face, helping to better discharge the exhaled gas accumulated in the mask. After the oxygen enters the mask and diffuses during the exhalation stage, its concentration will decrease. When it reaches the patient's inhalation stage, it can ensure that the final inhalation concentration will not be too high, and the patient's repeated inhalation of CO2 during the inhalation stage can be avoided as much as possible, so as to finally achieve the purpose of improving ventilation and adjust the oxygenation level to a level recognized by the doctor. Especially for patients with shallow and fast exhalation, in the traditional oxygen therapy process, the CO2 exhaled by the patient is inhaled into the body again before it is discharged, resulting in the oxygen therapy effect not being better achieved. The method provided in this embodiment can solve this problem well.

[0104] When it is detected that the patient's respiratory rate is 35 and the heart rate is 140 times / minute, it is judged as a relatively serious carbon dioxide retention, and the central control unit 500 controls the oxygen supply mode of the oxygen supply device 200 to supply oxygen to the user in the third time period of the duration from the late exhalation stage to the late inhalation stage, and stop supplying oxygen in the fourth time period of the duration from the late inhalation stage to the late exhalation stage, so that the arterial oxygen saturation reaches 88-92%. Preferably, the late inhalation stage refers to the end of the body's inhalation process and the entry into the exhalation stage. Preferably, the late exhalation stage refers to the end of the body's exhalation process and the entry into the inhalation stage.

[0105] The advantage of this embodiment is that it is not necessary to adjust the oxygen flow parameter or oxygen concentration multiple times, but the final oxygen concentration is adjusted by the time period of intermittent oxygen supply. Compared with the intermittent oxygen supply mode for mild carbon dioxide retention, the intermittent oxygen supply mode for severe carbon dioxide retention adopts a mode in which oxygen is supplied to the user in the third time period from the end of the exhalation phase to the end of the inhalation phase, and oxygen supply is stopped in the fourth time period from the end of the inhalation phase to the end of the exhalation phase. Since patients with mild carbon dioxide retention and patients with severe carbon dioxide retention have different oxygen requirements, in this embodiment, the intermittent oxygen supply mode is used to supply oxygen to the user in the third time period from the end of the exhalation phase to the end of the inhalation phase. It is only necessary to turn on and off the oxygen supply according to the patient's breathing stage. There is no need to set parameters such as oxygen flow or oxygen concentration. Different oxygen supply modes can use the same oxygen flow parameter settings. For situations where oxygen demand is low, the mode of supplying oxygen in the exhalation stage and stopping oxygen supply in the inhalation stage is used so that the oxygen entering the mask has time to diffuse to reduce the patient's final oxygen concentration. For situations where oxygen demand is greater, oxygen supply is used in the late exhalation stage until the oxygen supply is stopped in the late inhalation stage to ensure the patient's oxygen intake. In addition, based on the patient's individual breathing differences, the breathing detection system can set a breathing pattern suitable for the patient to achieve better oxygen therapy effects.

[0106] In this embodiment, the breathing stage refers to the stage in which the body is in when performing a breathing movement, including the exhalation stage, the inhalation stage, and the alternating breathing stage. The exhalation stage refers to the time period during which the body exhales. The inhalation stage refers to the time period during which the body inhales. The alternating breathing stage is the stage from the end of exhalation to the beginning of inhalation and the stage from the end of inhalation to the beginning of exhalation. The change of the breathing stage refers to the transition from one stage to another during the breathing process, such as the change from the exhalation stage to the inhalation stage.

[0107] Preferably, the second monitoring unit 400 is an electrocardiogram monitor. The electrocardiogram monitor can at least measure the user's electrocardiogram, heart rate, and respiratory rate and generate monitoring data. The second monitoring unit 400 is connected to the central control unit 500 for communication.

[0108] Preferably, the central control unit 500 is provided with a calculation module 510. The second monitoring unit 400 obtains the monitoring data of the user and sends it to the central control unit 500. The calculation module 510 obtains the breathing stage of the user after analyzing the monitoring data, and generates a corresponding breathing curve. Specifically, after the electrocardiogram is generated, the electrocardiogram monitor sends the data to the central control unit 500, and the calculation module 510 of the central control unit 500 connects the values ​​of the R wave in the electrocardiogram through a smooth curve to construct a breathing curve. The calculation module 510 determines the breathing stage of the user according to the slope of the point in the breathing curve. For example, in the exhalation curve, the calculation module 510 detects that the slope is 0 at point A, and it is judged that there is no breathing, which can represent the end point of the exhalation stage or the end point of the inhalation stage; the calculation module 510 detects that the slope is positive at point B, and judges that the user is in the exhalation stage at the time point corresponding to point B; the calculation module 510 detects that the slope is negative at point C, and judges that the user is in the inhalation stage at the time point corresponding to point C.

[0109] According to a preferred embodiment, when the calculation module 510 monitors that the slope changes from positive to 0, it is judged that the exhalation stage ends and the end point of the exhalation stage is reached; when the calculation module 510 monitors that the slope changes from 0 to negative, it is judged that the inhalation stage begins and the start point of the inhalation stage is reached; when the calculation module 510 monitors that the slope changes from negative to 0, it is judged that the inhalation stage ends and the end point of the inhalation stage is reached; when the calculation module 510 monitors that the slope changes from 0 to positive, it is judged that the exhalation stage begins and the start point of the exhalation stage is reached.

[0110] Preferably, the breathing curve at least includes time information such as the exhalation phase, the inhalation phase, the end point of exhalation, the end point of inhalation, the late exhalation phase, and the late inhalation phase.

[0111] It should be noted that the above-mentioned specific embodiments are exemplary, and those skilled in the art can come up with various solutions inspired by the disclosure of the present invention, and these solutions also belong to the disclosure scope of the present invention and fall within the protection scope of the present invention. Those skilled in the art should understand that the present invention specification and its drawings are illustrative and do not constitute a limitation of the claims. The scope of protection of the present invention is defined by the claims and their equivalents. The present invention specification contains multiple inventive concepts, such as "preferably", "according to a preferred embodiment" or "optionally", all of which indicate that the corresponding paragraph discloses an independent concept, and the applicant reserves the right to file a divisional application based on each inventive concept. Throughout the text, the feature guided by "preferably" is only an optional method and should not be understood as a must-have setting. Therefore, the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A breathing detection system, comprising: A mask body (100) configured to cover at least a portion of a user's face to deliver oxygen to the user; an oxygen supply device (200), configured to provide oxygen to the user through the mask body (100); A first monitoring unit (300) configured to monitor a physiological parameter that changes along with a change in the partial pressure of carbon dioxide in the arterial blood of a user; and a central control unit (500), wherein the central control unit (500) is communicatively connected to the oxygen supply device (200) and the first monitoring unit (300), respectively, and is characterized in that: The central control unit (500) is configured to: when the physiological parameter acquired by the first monitoring unit (300) exceeds a preset range, adjust the oxygen supply device (200) to an intermittent oxygen supply mode to adjust the amount of oxygen provided by the oxygen supply device (200), thereby adjusting the oxygenation level; The central control unit (500) is configured to: When the physiological parameter exceeds the upper limit of the preset range and is less than the first preset value, the oxygen supply device (200) is controlled to supply oxygen to the user during a first time period of the duration of the user's exhalation phase, and to stop supplying oxygen during a second time period of the duration of the user's inhalation phase, wherein: The preset range is the fluctuation range of the user's physiological parameters within the safe range specified by the doctor's order. The first preset value is a reference value of the physiological parameter for judging whether the arterial carbon dioxide partial pressure of the user is slightly elevated or severely elevated; When the physiological parameter is greater than a first preset value, the oxygen supply device (200) is controlled to supply oxygen to the user in a third time period lasting from the end of the exhalation phase to the end of the inhalation phase, and to stop supplying oxygen in a fourth time period lasting from the end of the inhalation phase to the end of the exhalation phase.

2. The system according to claim 1, characterized in that The system further comprises: The second monitoring unit (400) is configured to monitor the breathing phase of the user, wherein: The breathing phase at least includes an exhalation phase and an inhalation phase of the user, The central control unit (500) is configured to control the oxygen supply device (200) to supply oxygen to the user during the exhalation phase and / or the inhalation phase according to changes in the breathing phase.

3. The system according to claim 2, characterized in that The physiological parameters include at least breathing rate and heart rate.

4. The system according to claim 3, characterized in that The oxygenation level is arterial oxygen saturation.

5. The system according to claim 4, characterized in that The central control unit (500) further comprises a calculation module (510), wherein the calculation module (510) is configured to obtain the duration of the user's exhalation phase and / or inhalation phase.

6. The system according to claim 5, characterized in that The second monitoring unit (400) is an electrocardiogram monitoring instrument.

7. The system according to claim 6, characterized in that The second monitoring unit (400) is communicatively connected to the central control unit (500) to receive the electrocardiogram parameters of the second monitoring unit (400).

8. The system according to claim 7, characterized in that The first monitoring unit (300) is a respiratory rate sensor.

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