Novel mixed oxyhemoglobin saturation instrument

Abstract

The utility model discloses a novel mixed blood oxygen saturation instrument which comprises an arterial blood oxygen monitoring sensor which is clamped on an arterial blood pipeline of extracorporeal circulation equipment and is used for emitting light with different wavelengths to the arterial blood pipeline, receiving reflected light of the arterial blood pipeline and converting the intensity of the reflected light into a digital signal; the vein blood oxygen monitoring sensor is clamped on a vein blood pipeline of extracorporeal circulation equipment and is used for emitting light with different wavelengths to the vein blood pipeline, receiving reflected light of the vein blood pipeline and converting the intensity of the reflected light into a digital signal; and the host is used for processing the digital signal fed back by the arterial blood oxygen monitoring sensor and calculating arterial blood oxygen, and processing the digital signal fed back by the venous blood oxygen monitoring sensor and calculating venous blood oxygen. According to the utility model, non-contact blood monitoring is carried out on the artery blood pipeline and the vein blood pipeline of extracorporeal circulation equipment instead of acting on a human body, so that extra infection risks cannot be caused.

Description

Technical Field

[0001] The utility model relates to the technical field of pulse oximeters, and particularly relates to a new type of hybrid blood oxygen saturation meter. Background Art

[0002] As a monitoring device, a pulse oximeter mainly measures pulse rate, blood oxygen saturation, and perfusion index. Blood oxygen saturation is one of the important basic data in clinical medicine. Blood oxygen saturation refers to the percentage of the O2-binding capacity in the total blood volume that is bound to O2. Blood oxygen saturation is an important indicator reflecting the oxygen status in the body, and the physical quantity of blood oxygen saturation is used to describe the change of oxygen content in the blood. An optical pulse oximeter measures blood oxygen saturation by utilizing the difference in the absorption of red light and infrared light by oxyhemoglobin and deoxyhemoglobin.

[0003] Chinese Utility Model Patent CN219224802U discloses an in vitro blood monitoring device. When this device is used for detection, a disposable sampling needle needs to be inserted into the artery of a patient to draw blood. Therefore, this device is an invasive device and is likely to cause infection to the patient. Content of the Utility Model

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect that the existing pulse oximeter is an invasive device and is likely to cause infection to the patient, so as to provide a new type of hybrid blood oxygen saturation meter.

[0005] To achieve the above object, the technical solution adopted by the utility model is as follows:

[0006] The new type of hybrid blood oxygen saturation meter includes:

[0007] An arterial blood oxygen monitoring sensor, which is clamped on the arterial blood pipeline of an extracorporeal circulation device, is used to emit lights with different wavelengths to the arterial blood pipeline, receive the reflected light from the arterial blood pipeline, and convert the intensity of the reflected light into a digital signal;

[0008] A venous blood oxygen monitoring sensor, which is clamped on the venous blood pipeline of an extracorporeal circulation device, is used to emit lights with different wavelengths to the venous blood pipeline, receive the reflected light from the venous blood pipeline, and convert the intensity of the reflected light into a digital signal;

[0009] A host, which is respectively connected to the output ends of the arterial blood oxygen monitoring sensor and the venous blood oxygen monitoring sensor. The host is used to process the digital signal fed back by the arterial blood oxygen monitoring sensor and calculate the arterial blood oxygen, process the digital signal fed back by the venous blood oxygen monitoring sensor and calculate the venous blood oxygen, and calibrate the arterial blood oxygen and the venous blood oxygen respectively.

[0010] Further optimizing the technical solution, the arterial blood oxygen monitoring sensor includes:

[0011] The first blood oxygen monitoring sensor base has a first groove opened at the top end;

[0012] The first binding strap is arranged on the first blood oxygen monitoring sensor base;

[0013] The arterial light source emitter includes a first arterial light source emitter and a second arterial light source emitter respectively arranged inside the first blood oxygen monitoring sensor base. The first arterial light source emitter is used to emit red light with different wavelengths to the blood, and the second arterial light source emitter is used to emit infrared light with different wavelengths to the blood;

[0014] The first arterial detector is arranged inside the first blood oxygen monitoring sensor base and is used to receive the reflected light of the red light by the blood;

[0015] The second arterial detector is arranged inside the first blood oxygen monitoring sensor base and is used to receive the reflected light of the infrared light by the blood;

[0016] The first processing circuit is respectively connected to the output ends of the first arterial detector and the second arterial detector and is used to convert the reflected light into digital signals;

[0017] The first window is arranged on the first blood oxygen monitoring sensor base and is used to enable the red light emitted by the first arterial light source emitter to pass through and be reflected by the blood and then received by the first arterial detector, and enable the red light emitted by the second arterial light source emitter to pass through and be reflected by the blood and then received by the second arterial detector.

[0018] To further optimize the technical solution, the first binding strap is a first flexible binding strap.

[0019] To further optimize the technical solution, the first processing circuit is electrically connected to the host through a first cable, and a first cable fixing cover plate is arranged at the end of the first blood oxygen monitoring sensor base.

[0020] To further optimize the technical solution, the first groove is a first flexible conformal contact surface adapted to the arterial blood pipeline.

[0021] To further optimize the technical solution, the venous blood oxygen monitoring sensor includes:

[0022] The second blood oxygen monitoring sensor base has a second groove opened at the top end;

[0023] The second binding strap is arranged on the second blood oxygen monitoring sensor base;

[0024] The venous light source emitter includes a first venous light source emitter and a second venous light source emitter respectively arranged inside the second blood oxygen monitoring sensor base. The first venous light source emitter is used to emit red light with different wavelengths to the blood, and the second venous light source emitter is used to emit infrared light with different wavelengths to the blood;

[0025] A first venous detector, disposed inside the second blood oxygen monitoring sensor base, for receiving the reflected light of red light by blood;

[0026] A second venous detector, disposed inside the second blood oxygen monitoring sensor base, for receiving the reflected light of infrared light by blood;

[0027] A second processing circuit, respectively connected to the output ends of the first venous detector and the second venous detector, for converting the reflected light into a digital signal;

[0028] A second window, disposed on the second blood oxygen monitoring sensor base, for allowing the red light emitted by the first venous light source emitter to pass through and be reflected by blood and then received by the first venous detector, and for allowing the red light emitted by the second venous light source emitter to pass through and be reflected by blood and then received by the second venous detector.

[0029] Further optimizing the technical solution, the second binding band is a second flexible binding band.

[0030] Further optimizing the technical solution, the second processing circuit is electrically connected to the host through a second cable, and a second cable fixing cover plate is disposed at the end of the second blood oxygen monitoring sensor base.

[0031] Further optimizing the technical solution, the second groove is a second flexible conformal contact surface adapted to the arterial blood pipeline.

[0032] The technical solution of the present utility model has the following advantages:

[0033] 1. The novel hybrid blood oxygen saturation meter provided by the present utility model uses an arterial blood oxygen monitoring sensor to perform non-contact blood monitoring on the arterial blood pipeline of an extracorporeal circulation device, and uses a venous blood oxygen monitoring sensor to perform non-contact blood monitoring on the venous blood pipeline of the extracorporeal circulation device. Therefore, this device does not act on the human body and will not cause additional infection risks.

[0034] 2. The novel hybrid blood oxygen saturation meter provided by the present utility model has both the first binding band and the second binding band designed to be flexible, which are adapted to consumables with different diameters.

[0035] 3. The novel hybrid blood oxygen saturation meter provided by the present utility model has a first groove opened at the top of the first blood oxygen monitoring sensor base. The first groove is a first flexible conformal contact surface adapted to the arterial blood pipeline. Furthermore, when the arterial blood pipeline is placed at the position of the first groove, the first groove can better fit with the arterial blood pipeline.

[0036] The top of the second blood oxygen monitoring sensor base is provided with a second groove, and the second groove is a second flexible conformal contact surface adapted to the arterial blood pipeline. Thus, when the venous blood pipeline is placed at the position of the second groove, the second groove can better fit with the venous blood pipeline.

[0037] 4. The novel hybrid blood oxygen saturation meter provided by the utility model has a self-calibration function, is easy to operate, and has high precision.

[0038] 5. The novel hybrid blood oxygen saturation meter provided by the utility model has a non-consumable design and low cost.

[0039] 6. The novel hybrid blood oxygen saturation meter provided by the utility model can customize alarm trigger conditions, has a linkage control interface, can be used to link and control other devices, and is safe and flexible. Description of the Drawings

[0040] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0041] Figure 1 It is a schematic structural diagram of the novel hybrid blood oxygen saturation meter provided by the utility model;

[0042] Figure 2 It is a schematic structural diagram of the arterial blood oxygen monitoring sensor of the novel hybrid blood oxygen saturation meter provided by the utility model;

[0043] Figure 3 It is a schematic structural diagram of the venous blood oxygen monitoring sensor of the novel hybrid blood oxygen saturation meter provided by the utility model.

[0044] Reference numerals: 1, main body; 2, arterial blood oxygen monitoring sensor; 3, venous blood oxygen monitoring sensor; 4, first cable; 5, second cable; 6, first binding band; 7, first blood oxygen monitoring sensor base; 8, first cable fixing cover plate; 9, first window; 10, first flexible conformal contact surface; 11, second binding band; 12, second blood oxygen monitoring sensor base; 13, second cable fixing cover plate; 14, second window; 15, second flexible conformal contact surface. Detailed Embodiments

[0045] Exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present utility model can be more thoroughly understood and the scope of the present utility model can be completely conveyed to those skilled in the art.

[0046] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an" as used herein may also include the plural forms. The terms "comprising", "including" and "having" are inclusive and thus specify the presence of the stated features, elements and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0047] Although terms such as first, second, etc. may be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used in the text. In addition, in the description of the present utility model, unless otherwise clearly defined and limited, the terms "arranged", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0048] For ease of description, spatial relative relationship terms can be used in the text to describe the relationship of one element or feature shown in the figure relative to another element or feature. These relative relationship terms such as "front", "rear", "middle", "inner", "longitudinal", "lateral", "side", "vertical", "outer", etc. This spatial relative relationship term is intended to include different orientations of the mechanism in use or operation other than the orientations depicted in the figure. For example, if the mechanism in the figure is flipped, the element described as "below other elements or features" or "beneath other elements or features" will then be oriented as "above other elements or features" or "over other elements or features". Therefore, the exemplary term "below" can include both the upper and lower orientations. The mechanism can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are accordingly interpreted.

[0049] Medical devices refer to instruments, equipment, apparatus, in vitro diagnostic reagents and calibrators, materials, and other similar or related items that are directly or indirectly used on the human body, including the required computer software, with the purpose of diagnosing, preventing, monitoring, treating, or alleviating diseases, diagnosing, monitoring, treating, alleviating, or compensating for injuries; examining, substituting, regulating, or supporting physiological structures or physiological processes, supporting or maintaining life, controlling pregnancy; providing information for medical or diagnostic purposes by examining samples taken from the human body. A monitor is one of the commonly used medical devices.

[0050] As a type of monitor, a pulse oximeter mainly measures pulse rate, blood oxygen saturation, and perfusion index. Blood oxygen saturation is one of the important basic data in clinical medicine. Blood oxygen saturation refers to the percentage of the O2 - bound volume in the total blood volume to the total bindable O2 volume. Blood oxygen saturation is an important indicator reflecting the oxygen status in the body, and this physical quantity is used to describe the change in the oxygen content in the blood. An optical pulse oximeter measures blood oxygen saturation by utilizing the difference in the absorption of red light and infrared light by oxyhemoglobin and deoxyhemoglobin.

[0051] Blood oxygen saturation is a measurement of the oxygen content in the blood, which can help doctors diagnose diseases. Venous blood oxygen saturation refers to the oxygen content in venous blood, which can reflect the absorption and distribution of oxygen in the blood and the oxygen absorption capacity of the lungs. Arterial blood oxygen saturation refers to the oxygen content in arterial blood, which can reflect the oxygen absorption capacity of the lungs and the oxygen distribution capacity of the blood. The oxygen saturation of venous blood and arterial blood is different. The oxygen saturation of venous blood generally ranges between 75% - 95%, while the oxygen saturation of arterial blood is generally between 95% - 100%. Under normal circumstances, the oxygen saturation of arterial blood is higher than that of venous blood.

[0052] Chinese Utility Model Patent CN219224802U discloses an extracorporeal blood monitoring device. When this device conducts detection, it is necessary to insert a disposable sampling needle into the patient's artery to draw blood. Therefore, this device is an invasive device and is likely to cause infection to the patient.

[0053] Based on this, the present utility model provides a new type of hybrid blood oxygen saturation meter, which uses an arterial blood oxygen monitoring sensor to conduct non - contact blood monitoring on the arterial blood pipeline of an extracorporeal circulation device, and uses a venous blood oxygen monitoring sensor to conduct non - contact blood monitoring on the venous blood pipeline of the extracorporeal circulation device. Therefore, this device does not act on the human body and will not cause additional infection risks.

[0054] Existing blood monitoring devices can monitor the blood oxygen content in venous or arterial lines. However, they usually measure venous blood oxygen and arterial blood oxygen separately and calibrate arterial blood oxygen and venous blood oxygen respectively. Since venous blood oxygen fluctuates with tissue oxygen consumption ability, the calibration value of venous blood oxygen is not stable enough and even deviates from the actual blood oxygen value.

[0055] Based on this, the present utility model uses arterial blood oxygen to automatically correct venous blood oxygen. By utilizing the stability of arterial blood oxygen, a more stable corrected value of venous blood oxygen can be obtained. Moreover, the obtained corrected value of venous blood oxygen is not affected by changes in tissue oxygen consumption ability, making the accuracy of the obtained corrected value of venous blood oxygen higher.

[0056] The following elaborates on the specific embodiments of the present utility model in detail in conjunction with the novel hybrid blood oxygen saturation meter of the first aspect of the present utility model.

[0057] It should be noted that the novel hybrid blood oxygen saturation meter of the first aspect of the present utility model is only a preferred embodiment of the present utility model. The converter of the present utility model can either adopt the novel hybrid blood oxygen saturation meter of the first aspect of the present utility model or other structures. For the convenience of elaboration, the specific embodiments of the present utility model are elaborated below through the novel hybrid blood oxygen saturation meter of the first aspect of the present utility model.

[0058] As Figures 1 to 3 shown, this embodiment discloses a novel hybrid blood oxygen saturation meter, which includes an arterial blood oxygen monitoring sensor 2, a venous blood oxygen monitoring sensor 3, and a main unit 1.

[0059] The arterial blood oxygen monitoring sensor 2 is clamped on the arterial blood line of the extracorporeal circulation device. The reflection coefficients of oxyhemoglobin and deoxyhemoglobin for different spectra are different. By monitoring the reflected light intensities of different spectra, the contents of oxyhemoglobin and deoxyhemoglobin in the blood can be measured by fitting. The arterial blood oxygen monitoring sensor 2 is used to emit light of different wavelengths to the arterial blood line through the built-in light source, receive the reflected light from the arterial blood line, and convert the reflected light intensity into a digital signal.

[0060] The venous blood oxygen monitoring sensor 3 is clamped on the venous blood line of the extracorporeal circulation device. The reflection coefficients of oxyhemoglobin and deoxyhemoglobin for different spectra are different. By monitoring the reflected light intensities of different spectra, the contents of oxyhemoglobin and deoxyhemoglobin in the blood can be measured by fitting. The venous blood oxygen monitoring sensor 3 is used to emit light of different wavelengths to the venous blood line through the built-in light source, receive the reflected light from the venous blood line, and convert the reflected light intensity into a digital signal.

[0061] The host 1 is respectively connected to the output ends of the arterial blood oxygen monitoring sensor 2 and the venous blood oxygen monitoring sensor 3. The host 1 is used to process the digital signals fed back by the arterial blood oxygen monitoring sensor 2 and calculate the arterial blood oxygen, process the digital signals fed back by the venous blood oxygen monitoring sensor 3 and calculate the venous blood oxygen, and calibrate the arterial blood oxygen and the venous blood oxygen respectively.

[0062] For the above-mentioned new type of hybrid blood oxygen saturation meter, the arterial blood oxygen monitoring sensor 2 is used to perform non-contact blood monitoring on the venous blood pipeline of the extracorporeal circulation device, and the venous blood oxygen monitoring sensor 3 is used to perform non-contact blood monitoring on the venous blood pipeline of the extracorporeal circulation device. Therefore, this device does not act on the human body and will not cause additional infection risks.

[0063] In some embodiments, the arterial blood oxygen monitoring sensor 2 includes a first blood oxygen monitoring sensor base 7, a first binding strap 6, an arterial light source emitter, a first arterial detector, a second arterial detector, a first processing circuit, and a first window 9.

[0064] Among them, a first groove is formed at the top of the first blood oxygen monitoring sensor base 7. The first groove is a first flexible conformal contact surface 10 adapted to the arterial blood pipeline. Thus, when the arterial blood pipeline is placed at the position of the first groove, the first groove can better fit with the arterial blood pipeline.

[0065] The first binding strap 6 is arranged on the first blood oxygen monitoring sensor base 7 and is used to tightly fix the arterial blood pipeline to the first blood oxygen monitoring sensor base 7. And the first binding strap 6 is set to be flexible and can adapt to various different specifications of arterial blood pipelines.

[0066] The arterial light source emitter includes a first arterial light source emitter and a second arterial light source emitter respectively arranged inside the first blood oxygen monitoring sensor base 7. The first arterial light source emitter is used to emit red light of different wavelengths to the blood, and the second arterial light source emitter is used to emit infrared light of different wavelengths to the blood.

[0067] The first arterial detector is arranged inside the first blood oxygen monitoring sensor base 7 and is used to receive the reflected light of the red light by the blood.

[0068] The second arterial detector is arranged inside the first blood oxygen monitoring sensor base 7 and is used to receive the reflected light of the infrared light by the blood.

[0069] The first processing circuit is respectively connected to the output ends of the first arterial detector and the second arterial detector and is used to convert the reflected light into digital signals.

[0070] The first window 9 is provided on the first blood oxygen monitoring sensor base 7. The position of the first window 9 corresponds to the positions of the first arterial light source emitter, the second arterial light source emitter, the first arterial detector, and the second arterial detector, and is used to allow the red light emitted by the first arterial light source emitter to pass through and be reflected by the blood and then received by the first arterial detector, and to allow the red light emitted by the second arterial light source emitter to pass through and be reflected by the blood and then received by the second arterial detector. That is, the first window 9 is a light source emission and scattered light reception window.

[0071] In some embodiments, the arterial light source emitter emits light with a wavelength of 450 nm to 900 nm. Preferably, the arterial light source emitter emits light with three or more wavelengths with an interval of not less than 100 nm among 527 nm, 660 nm, 680 nm, 710 nm, 740 nm, 760, 802 nm, 803, 805, 810 nm, 815 nm, 825 nm, 827 nm, 830 nm, 850 nm, 880 nm, 900 nm, 935 nm, 999 nm.

[0072] More specifically, the first arterial light source emitter, the second arterial light source emitter, the first arterial detector, and the second arterial detector are all electrically connected to the host 1 through the first cable 4, where the first cable 4 is a power supply and communication cable.

[0073] The first cable fixing cover plate 8 is further provided on the arterial blood oxygen monitoring sensor 2 to press and protect the end of the first cable 4 through the first cable fixing cover plate 8.

[0074] In some embodiments, the venous blood oxygen monitoring sensor 3 includes a second blood oxygen monitoring sensor base 12, a second binding band 11, a venous light source emitter, a first venous detector, a second venous detector, a second processing circuit, and a second window 14.

[0075] Among them, a second groove is formed at the top of the second blood oxygen monitoring sensor base 12, and the second groove is a second flexible conformal contact surface 15 adapted to the arterial blood pipeline. Then, when the venous blood pipeline is placed at the position of the second groove, the second groove can better fit the venous blood pipeline.

[0076] The second binding band 11 is provided on the second blood oxygen monitoring sensor base 12 to tightly fix the venous blood pipeline to the second blood oxygen monitoring sensor base 12. And the second binding band 11 is set to be flexible and can adapt to various different specifications of venous blood pipelines.

[0077] The venous light source emitter includes a first venous light source emitter and a second venous light source emitter respectively disposed inside the second blood oxygen monitoring sensor base 12. The first venous light source emitter is used to emit red light of different wavelengths to the blood, and the second venous light source emitter is used to emit infrared light of different wavelengths to the blood.

[0078] The first venous detector is disposed inside the second blood oxygen monitoring sensor base 12 and is used to receive the reflected light of the red light by the blood.

[0079] The second venous detector is disposed inside the second blood oxygen monitoring sensor base 12 and is used to receive the reflected light of the infrared light by the blood.

[0080] The second processing circuit is respectively connected to the output ends of the first venous detector and the second venous detector and is used to convert the reflected light into a digital signal.

[0081] The second window 14 is disposed on the second blood oxygen monitoring sensor base 12 and is used to allow the red light emitted by the first venous light source emitter to pass through and be reflected by the blood and then received by the first venous detector, and to allow the red light emitted by the second venous light source emitter to pass through and be reflected by the blood and then received by the second venous detector. That is, the second window 14 is a light source emission and scattered light receiving window.

[0082] In some embodiments, the venous light source emitter emits light with a wavelength of 450 nm to 1000 nm. Preferably, the venous light source emitter emits light of three or more wavelengths with an interval of not less than 100 nm among 527 nm, 660 nm, 680 nm, 710 nm, 740 nm, 760, 802 nm, 803, 805, 810 nm, 815 nm, 825 nm, 827 nm, 830 nm, 850 nm, 880 nm, 900 nm, 935 nm, 999 nm.

[0083] More specifically, the first venous light source emitter, the second venous light source emitter, the first venous detector, and the second venous detector are all electrically connected to the host 1 through the second cable 5, where the second cable 5 is a power supply and communication cable.

[0084] The second cable fixing cover plate 13 is further disposed on the venous blood oxygen monitoring sensor 3, and the second cable 5 is pressed and protected at the end through the second cable fixing cover plate 13.

[0085] In some embodiments, the host 1 includes an arterial blood oxygen calculation module, a venous blood oxygen calculation module, an arterial blood oxygen calibration module, a venous blood oxygen calibration module, and an alarm module. The arterial blood oxygen calculation module is used to calculate the arterial blood oxygen based on the reflected light intensities of different wavelengths of light by the arterial blood pipeline, and obtain an estimated value of the arterial blood oxygen. The venous blood oxygen calculation module is used to calculate the venous blood oxygen based on the reflected light intensities of different wavelengths of light by the venous blood pipeline, and obtain an estimated value of the venous blood oxygen. The arterial blood oxygen calibration module is used to correct the arterial blood oxygen based on the estimated value of the arterial blood oxygen, and obtain a corrected value of the arterial blood oxygen. The venous blood oxygen calibration module is used to automatically correct the venous blood oxygen based on the estimated value of the arterial blood oxygen and the corrected value of the arterial blood oxygen, or manually correct the venous blood oxygen based on the estimated value of the venous blood oxygen and the manually input venous blood oxygen value, and obtain a corrected value of the venous blood oxygen. The alarm module is used to send an alarm signal when the corrected value of the arterial blood oxygen and / or the corrected value of the venous blood oxygen exceeds the warning threshold.

[0086] In this embodiment, after calculating and calibrating the arterial blood oxygen, the venous blood oxygen is calculated, and the venous blood oxygen is automatically corrected based on the estimated value of the arterial blood oxygen and the corrected value of the arterial blood oxygen, ensuring the accuracy of the corrected value of the venous blood oxygen. Moreover, the measurement of the arterial blood oxygen and the venous blood oxygen is non-contact, and no blood extraction from the artery and vein is required during correction, thus avoiding the risk of infection. Due to the deviation in measurement between the arterial blood oxygen monitoring sensor 2 and the venous blood oxygen monitoring sensor 3, when using the arterial blood oxygen to automatically correct the venous blood oxygen in this embodiment, only the arterial blood oxygen is measured by the arterial blood oxygen monitoring sensor 2, eliminating the steps of measuring and calibrating the venous blood oxygen by the venous blood oxygen monitoring sensor 3. There is no need to introduce the venous blood oxygen monitoring sensor 3 to measure the venous blood oxygen. Adopting the method in this embodiment can reduce the measurement deviation and ensure the accuracy of the measurement.

[0087] Moreover, the venous blood oxygen fluctuates with the tissue oxygen consumption ability; while the arterial blood oxygen is directly output by the extracorporeal circulation device and is not affected by the change of the tissue oxygen consumption ability, being relatively stable. Therefore, in this utility model, the arterial blood oxygen is used to automatically correct the venous blood oxygen. Using the stability of the arterial blood oxygen can obtain the corrected value of the venous blood oxygen more stably, and the obtained corrected value of the venous blood oxygen is not affected by the change of the tissue oxygen consumption ability, making the accuracy of the obtained corrected value of the venous blood oxygen higher.

[0088] The following elaborates on the specific embodiments of this utility model in detail in combination with the usage method of the novel hybrid blood oxygen saturation meter according to the second aspect of this utility model.

[0089] This embodiment discloses a usage method of a novel hybrid blood oxygen saturation meter, including the following steps:

[0090] S1. Clamp the arterial oxygen monitoring sensor 2 on the arterial blood pipeline of the extracorporeal circulation device, and clamp the venous oxygen monitoring sensor 3 on the venous blood pipeline of the extracorporeal circulation device.

[0091] S2. Emit red light and infrared light of different wavelengths to the arterial blood pipeline respectively, monitor the reflected light intensity of different lights, and after digitizing the reflected light intensity, feedback it to the host 1. Estimate the blood oxygen saturation in the arterial blood pipeline through the host 1 and obtain the arterial blood oxygen estimation value; correct the arterial blood oxygen based on the arterial blood oxygen estimation value.

[0092] Emit red light and infrared light of different wavelengths to the venous blood pipeline respectively, monitor the reflected light intensity of different lights, and after digitizing the reflected light intensity, feedback it to the host 1. Estimate the blood oxygen saturation in the venous blood pipeline through the host 1 and obtain the venous blood oxygen estimation value; automatically correct the venous blood oxygen based on the arterial blood oxygen estimation value and the arterial blood oxygen correction value, or manually correct the venous blood oxygen based on the venous blood oxygen estimation value and the manually input venous blood oxygen value to obtain the venous blood oxygen correction value.

[0093] The usage method of the above-mentioned novel hybrid blood oxygen saturation meter further includes a step of selecting a calibration mode: select a calibration mode in the host 1, and the calibration mode includes a self-calibration mode and a manual calibration mode;

[0094] S21. When the self-calibration mode is selected:

[0095] S211. Calculate the arterial blood oxygen according to the following formula:

[0096]

[0097] Where: SaO2 is the arterial blood oxygen estimation value, A n,m , B n,m , C n,m , D n,m , E n,m , F n,m and L are constants (obtained based on historical data and experience), R λn is the reflected light energy value of wavelength λ n (which can be directly obtained through the arterial oxygen monitoring sensor), R λm is the reflected light energy value of wavelength λ m (which can be directly obtained through the arterial oxygen monitoring sensor).

[0098] S212. Calculate the venous blood oxygen according to the following formula:

[0099]

[0100] Where: SvO2 is the venous blood oxygen estimation value, an,m , b n,m , c n,m , d n,m , e n,m , f n,m , and l are constants (obtained based on historical data and experience), R λn is the reflected light energy value at wavelength λ n (which can be directly obtained through a venous blood oxygen monitoring sensor), R λm is the reflected light energy value at wavelength λ m (which can be directly obtained through a venous blood oxygen monitoring sensor).

[0101] S213. Correct the arterial blood oxygen according to the following formula;

[0102] SaO'2 = A * SaO 2 2 + B * SaO2 + ε

[0103] Where: SaO'2 is the arterial blood oxygen value after automatic calibration, and A, B, and ε are constants (obtained based on historical data and experience).

[0104] After correcting the arterial blood oxygen, when the arterial blood oxygen reaches 100%, then switch to calibrating the venous blood oxygen and observe the venous blood oxygen status.

[0105] S214. Calibrate the venous blood oxygen according to the following formula:

[0106] SvO'2 = (α * (SaO'2 - SaO2) 3 + β * (SaO'2 - SaO2) 2 + χ * (SaO'2 - SaO2) +

[0107] δ * (SaO'2 - SaO2) -3 + φ * (SaO'2 - SaO2) -2 + μ * (SaO'2 - SaO2) -1 + σ) * SvO2 +

[0108] (α1 * (SaO'2 - SaO2) 3 + β1 * (SaO'2 - SaO2) 2 + χ1 * (SaO'2 - SaO2) +

[0109] δ1 * (SaO'2 - SaO2) -3 + φ1 * (SaO'2 - SaO2) -2 + μ1 * (SaO'2 - SaO2) -1 + σ1

[0110] Where: SvO'2 is the venous oxygen value after automatic calibration, and α, β, χ, δ, φ, μ, σ, α1, β1, χ1, δ1, φ1, μ1, σ1 are constants (obtained based on historical data and experience).

[0111] S22. When the self-calibration mode is selected:

[0112] S221. Calculate the arterial oxygen according to the following formula:

[0113]

[0114] Where: SaO2 is the estimated arterial oxygen value, A n,m 、B n,m 、C n,m 、D n,m 、E n,m 、F n,m and L are constants (obtained based on historical data and experience), R λn is the reflected light energy value at wavelength λ n (which can be directly obtained by the arterial oxygen monitoring sensor), R λm is the reflected light energy value at wavelength λ m (which can be directly obtained by the arterial oxygen monitoring sensor).

[0115] S222. Calculate the venous oxygen according to the following formula;

[0116]

[0117] Where: SvO2 is the estimated venous oxygen value, a n,m 、b n,m 、c n,m 、d n,m 、e n,m 、f n,m 、and l are constants (obtained based on historical data and experience), R λn is the reflected light energy value at wavelength λ n (which can be directly obtained by the venous oxygen monitoring sensor), R λm is the reflected light energy value at wavelength λ m (which can be directly obtained by the venous oxygen monitoring sensor).

[0118] S223. Correct the arterial oxygen according to the following formula:

[0119] SaO'2 = (ω1 * (SaO2 - SaO d 2) 2 + τ1 * (SaO2 - SaO d 2)+ ε1) * SaO 2 2 +

[0120] (ω2*(SaO2-SaO d 2) 2 +τ2*(SaO2-SaO d 2)+ε2)*SaO2+ε3

[0121] Where: SaO'2 is the arterial blood oxygen value after manual calibration, SaO d 2 is the manually input arterial blood oxygen value, ω1, τ1, ε1, ω2, τ2, ε2, ε3 are constants (obtained based on historical data and experience).

[0122] S224. Calibrate venous blood oxygen according to the following formula:

[0123] SvO'2=(ωω1*(SvO2-SvO d 2) 2 +ττ1*(SvO2-SvO d 2)+εε1)*SvO 3 2+

[0124] (ωω2*(SvO2-SvO d 2) 2 +ττ2*(SvO2-SvO d 2)+εε2)*SvO 2 2+

[0125] (ωω3*(SvO2-SvO d 2) 2 +ττ3*(SvO2-SvO d 2)+εε3)*SvO2+εε4

[0126] Where: SvO'2 is the venous oxygen value after manual calibration, SvO d 2 is the manually entered venous oxygen value, ωω1, ωω2, ωω3, ττ1, ττ2, ττ3, εε1, εε2, εε3, εε3 are constants (obtained based on historical data and experience).

[0127] S3. When the arterial or venous blood oxygen exceeds the warning threshold, an alarm signal is sent out. When the venous blood oxygen is greater than the set value, it means that the flow is sufficient; when the venous blood oxygen is less than the set value, it means that the flow is insufficient and blood needs to be added to the artificial heart to increase the flow of the artificial heart.

[0128] Obviously, the above embodiments are merely examples for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the creation of the present utility model.

Claims

1. A new hybrid blood oxygen saturation meter, characterized in that: include: An arterial blood oxygen monitoring sensor (2) is clamped on the arterial blood pipeline of the extracorporeal circulation device, and is used to emit light of different wavelengths to the arterial blood pipeline, receive reflected light from the arterial blood pipeline, and convert the reflected light intensity into a digital signal; A venous blood oxygen monitoring sensor (3) is clamped on the venous blood pipeline of the extracorporeal circulation device, and is used to emit light of different wavelengths to the venous blood pipeline, receive reflected light from the venous blood pipeline, and convert the reflected light intensity into a digital signal; The host (1) is connected to the output ends of the arterial blood oxygen monitoring sensor (2) and the venous blood oxygen monitoring sensor (3), respectively. The host (1) is used to process the digital signal fed back by the arterial blood oxygen monitoring sensor (2) and calculate the arterial blood oxygen, to process the digital signal fed back by the venous blood oxygen monitoring sensor (3) and calculate the venous blood oxygen, and to calibrate the arterial blood oxygen and the venous blood oxygen, respectively.

2. The novel hybrid blood oxygen saturation meter according to claim 1 is characterized in that: The arterial blood oxygen monitoring sensor (2) comprises: A first blood oxygen monitoring sensor base (7) has a first groove formed on the top; A first binding belt (6) is arranged on a first blood oxygen monitoring sensor base (7); An arterial light source transmitter, comprising a first arterial light source transmitter and a second arterial light source transmitter respectively arranged inside the first blood oxygen monitoring sensor base (7), the first arterial light source transmitter being used to transmit red light of different wavelengths to the blood, and the second arterial light source transmitter being used to transmit infrared light of different wavelengths to the blood; A first artery detector is arranged inside the first blood oxygen monitoring sensor base (7) and is used to receive the reflected light of the blood to the red light; A second artery detector is arranged inside the first blood oxygen monitoring sensor base (7) and is used to receive the reflected light of the infrared light from the blood; A first processing circuit is connected to the output ends of the first artery detector and the second artery detector respectively, and is used to convert the reflected light into a digital signal; The first window (9) is arranged on the first blood oxygen monitoring sensor base (7) and is used to allow the red light emitted by the first arterial light source emitter to pass through and be reflected by the blood before being received by the first arterial detector, and to allow the red light emitted by the second arterial light source emitter to pass through and be reflected by the blood before being received by the second arterial detector.

3. The novel hybrid blood oxygen saturation meter according to claim 2 is characterized in that: The first binding belt (6) is a first flexible binding belt.

4. The novel hybrid blood oxygen saturation meter according to claim 2 is characterized in that: The first processing circuit is electrically connected to the host (1) via a first cable (4), and a first cable fixing cover plate (8) is provided at the end of the first blood oxygen monitoring sensor base (7).

5. The novel hybrid blood oxygen saturation meter according to claim 2 is characterized in that: The first groove is a first flexible conformal contact surface (10) adapted to the arterial blood line.

6. The novel hybrid blood oxygen saturation meter according to claim 1 is characterized in that: The venous blood oxygen monitoring sensor (3) comprises: A second blood oxygen monitoring sensor base (12) has a second groove formed on the top; A second binding belt (11), arranged on a second blood oxygen monitoring sensor base (12); The vein light source emitter comprises a first vein light source emitter and a second vein light source emitter respectively arranged inside the second blood oxygen monitoring sensor base (12), the first vein light source emitter being used to emit red light of different wavelengths to the blood, and the second vein light source emitter being used to emit infrared light of different wavelengths to the blood; A first vein detector is arranged inside the second blood oxygen monitoring sensor base (12) and is used to receive the reflected light of the blood to the red light; A second vein detector is arranged inside the second blood oxygen monitoring sensor base (12) and is used to receive the reflected light of the infrared light from the blood; A second processing circuit is connected to the output ends of the first vein detector and the second vein detector respectively, and is used to convert the reflected light into a digital signal; The second window (14) is arranged on the second blood oxygen monitoring sensor base (12) and is used to allow the red light emitted by the first vein light source emitter to pass through and be reflected by the blood before being received by the first vein detector, and to allow the red light emitted by the second vein light source emitter to pass through and be reflected by the blood before being received by the second vein detector.

7. The novel hybrid blood oxygen saturation meter according to claim 6 is characterized in that: The second binding belt (11) is a second flexible binding belt.

8. The novel hybrid blood oxygen saturation meter according to claim 6 is characterized in that: The second processing circuit is electrically connected to the host (1) via a second cable (5), and a second cable fixing cover plate (13) is provided at the end of the second blood oxygen monitoring sensor base (12).

9. The novel hybrid blood oxygen saturation meter according to claim 6 is characterized in that: The second groove is a second flexible conformal contact surface (15) adapted to the arterial blood line.

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