Display device of the monitor system

Abstract

To facilitate the management of a patient requiring extracorporeal circulation by monitoring respiratory system data and blood system data on one screen.SOLUTION: A display device 30 of a monitor system 300 for monitoring the state of a patient comprises: a display unit 31 for displaying respiratory system data related to the respiration of the patient, and blood system data related to the blood of the patient; and a display control unit 34 for controlling the display unit 31 so that the respiratory system data and the blood system data are simultaneously displayed.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a display device of a monitoring system for monitoring the state of a patient before, during, and after extracorporeal circulation of blood.

Background Art

[0002] Patent Document 1 describes a monitoring system including a display device. This display device displays a numerical table of the excretion amount of CO 2 gas, mixed expiratory concentration, alveolar ventilation volume, dead space volume, and alveolar gas concentration.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Extracorporeal circulation of a patient's blood is performed for the purpose of assisting and substituting for cardiopulmonary function. Therefore, in order to perform appropriate and safe extracorporeal circulation, monitoring of various parameters indicating the patient's state is required. In particular, when performing VV-ECMO (Veno-Venous Extra Corporeal Membrane Oxygenation), which is difficult to manage, monitoring of the state of the patient's native lung and monitoring of blood oxygenation by an artificial lung are required. For example, by using a blood gas monitor, blood oxygenation by an artificial lung indicated by blood gas parameters can be monitored. However, a blood gas monitor cannot monitor parameters indicating the state of the native lung.

Means for Solving the Problems

[0005] A display device according to an aspect of the present invention is a display device of a monitoring system for monitoring a patient's condition, and includes a display unit that displays respiratory system data related to the patient's respiration and blood system data related to the patient's blood, and a display control unit that controls the display unit so that the respiratory system data and the blood system data are displayed simultaneously.

Advantages of the Invention

[0006] Thereby, since the respiratory system data and the blood system data can be monitored on one screen, it becomes easy to manage patients who require extracorporeal circulation.

[0007] Further features of the present invention will become apparent from the following description of exemplary embodiments illustrated with reference to the accompanying drawings.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0009] Hereinafter, exemplary embodiments for carrying out the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, and relative positions of the components described in the following embodiments can be arbitrarily set and can be changed according to the configuration of the device to which the present invention is applied or various conditions. Also, unless otherwise specified, the scope of the present invention is not limited to the embodiments specifically described below.

[0010] [First Embodiment] The monitoring system 300 shown in FIG. 1 is used to monitor the state of a patient before, during, and after extracorporeal circulation. The monitoring system 300 includes a display device 30, an extracorporeal circulation system 100 that performs extracorporeal circulation of the blood of patient P, and a respiratory assistance system 200. For example, the respiratory assistance system 200 is a ventilator or an inhalation anesthesia system, etc., and in the example of FIG. 1, a ventilator is provided. However, the monitoring system 300 may acquire data to be displayed on the display device 30 from at least one of the extracorporeal circulation system 100 and the respiratory assistance system 200. In this case, the monitoring system 300 does not necessarily need to include the extracorporeal circulation system 100 and the respiratory assistance system 200. Further, the monitoring system 300 may acquire data to be displayed on the display device 30 from an external medical device.

[0011] [Extracorporeal Circulation System 100] For example, the extracorporeal circulation system 100 performs the circulation operation of the blood of patient P and the addition of oxygen to and the removal of carbon dioxide from the blood. For this purpose, the extracorporeal circulation system 100 includes a blood withdrawal line 112 which is an example of a blood withdrawal circuit, and a blood delivery line 113 which is an example of a blood delivery circuit for transporting the blood. Further, the extracorporeal circulation system 100 includes a blood delivery pump 114 that delivers the blood on the delivery side into the body of patient P through the blood delivery line 113. Furthermore, the extracorporeal circulation system 100 includes an artificial lung 115 that discharges carbon dioxide in the blood and adds oxygen to the blood.

[0012] The blood extraction line 112 is provided with a blood extraction side sensor S1 for detecting blood system data related to the patient's blood. For example, the blood system data is data obtained during the extracorporeal circulation of blood and includes, for example, partial pressure of oxygen and partial pressure of carbon dioxide. The blood delivery line 113 is provided with a blood delivery side sensor S2 for detecting blood system data. Furthermore, the extracorporeal circulation system 100 includes a circulation control device (not shown), and the circulation control device controls the entire extracorporeal circulation system 100. Blood system data (for example, the pressure of the sweep gas, etc.) from each part constituting the extracorporeal circulation system 100 is acquired by the circulation control device. For example, the blood extraction side sensor S1 transmits the blood system data detected from the blood extraction side blood flowing through the blood extraction line 112 to the circulation control device. Also, the blood delivery side sensor S2 transmits the blood system data detected from the blood delivery side blood flowing through the blood delivery line 113 to the circulation control device.

[0013] In addition, the extracorporeal circulation system 100 may further include another detection device for detecting blood system data from the patient P. As an example, the other detection device is a pulse oximeter that detects transcutaneous arterial oxygen saturation. The control unit 32 includes a storage unit (not shown) and stores the oxygen consumption and carbon dioxide production of the living lung and the oxygen consumption and carbon dioxide production of the artificial lung 115 in association with the time when they are detected or calculated. Each time is synchronized so as to be displayed on the same time axis.

[0014] The blood drainage line 112 is provided with a blood drainage flow rate adjustment unit (not shown). This blood drainage flow rate adjustment unit adjusts the blood drainage flow rate according to the rotation speed of the motor of the blood delivery pump 114. Specifically, when the rotation speed of the motor increases, the blood drainage flow rate increases, and when the rotation speed of the motor decreases, the blood drainage flow rate decreases. Alternatively, the blood drainage flow rate adjustment unit may have a clamp member and its driving unit. The clamp amount (pinching amount) of the blood drainage flow rate adjustment unit can be adjusted manually or by the driving force of a driving unit such as a motor. Thereby, the cross-sectional area of the blood drainage line 112 can be changed to adjust the blood drainage flow rate flowing through the blood drainage line 112. Also, a blood delivery flow rate adjustment unit may be provided in the blood delivery line 113. This blood delivery flow rate adjustment unit is, for example, a clamp member, and the clamp amount can be adjusted manually or by the driving force from a motor connected to the clamp member. Thereby, the cross-sectional area of the blood delivery line 113 can be changed to adjust the blood delivery flow rate flowing through the blood delivery line 113.

[0015] The blood delivery pump 114 is a centrifugal pump that rotates the impeller blades by a motor to deliver blood to the artificial lung 115. Also, the rotation speed of the motor of the blood delivery pump 114 is controlled by a control signal output from the circulation control device. Then, the blood delivery pump 114 delivers blood at a flow rate corresponding to the increased or decreased rotation speed. Alternatively, the blood delivery pump 114 may be a roller pump that sucks and extrudes the blood in the tube by rotating and moving while the rotating roller crushes the tube.

[0016] The artificial lung 115 includes, for example, a hollow fiber membrane or a flat membrane with excellent gas permeability, etc., and discharges carbon dioxide in the blood and adds oxygen. Further, the artificial lung 115 has a heat exchange part for adjusting the temperature of the blood. Specifically, the venous blood before oxygen addition that has been drawn out of or induced outside the patient P is sent to the artificial lung 115. Then, the artificial lung 115 separates bubbles from the venous blood by a filter arranged on the outer periphery of the heat exchange part. After that, the artificial lung 115 adjusts the temperature of the venous blood by the heat exchange part. Furthermore, the artificial lung 115 arterializes the venous blood through a gas exchange element by the gas exchange part. That is, the artificial lung 115 adds oxygen and removes carbon dioxide. Then, the artificial lung 115 separates clot masses from the arterial blood after oxygen addition by a filter arranged on the inner periphery of the gas exchange part. After that, the arterial blood is sent to the patient P through the blood delivery line 113. Note that the extracorporeal circulation system 100 may be provided with a line filter for removing bubbles, foreign substances, and white blood cells in the blood undergoing extracorporeal circulation.

[0017] The artificial lung 115 is connected to a gas supply part (not shown), and medical gas is supplied from the gas supply part to the artificial lung 115. This medical gas is a mixed gas composed of oxygen and air, and carbon dioxide is further added as necessary. In the gas supply part, the flow rate of the medical gas is detected as blood system data. Further, a temperature probe is provided in the artificial lung 115, and temperature data is transmitted to the circulation control device as blood system data. Also, a gas analyzer (not shown) for analyzing the gas flowing into and out of the artificial lung 115 may be provided. For example, the gas analyzer detects the oxygen concentration and carbon dioxide concentration of the inflowing gas and the outflowing gas as blood system data. Then, the gas analyzer transmits the detected oxygen concentration and carbon dioxide concentration to the circulation control device.

[0018] [Respiratory assistance system 200] The respiratory assistance system 200 includes a main body 201 having an operation panel, a gas supply unit, a gas mixing unit, a pressure adjustment unit, etc., a respiratory circuit 202 for sending a mixed gas of oxygen and air from the main body 201 to a patient, and a humidifying unit 203 for humidifying the mixed gas. Further, the main body 201 is provided with a respiratory control device (not shown), and the respiratory control device controls the entire respiratory assistance system 200. And respiratory system data (for example, mixed gas flow rate, etc.) from each part constituting the respiratory assistance system 200 is acquired by the respiratory control device.

[0019] Furthermore, the respiratory assistance system 200 includes a detection device 204 for respiratory system data. The detection device 204 is a device for detecting the state of a living lung, and for example, transmits data detected from a patient's exhalation to a display device 30 or the respiratory control device of the respiratory assistance system 200. As an example, the detection device 204 is a capnograph that measures the concentration of carbon dioxide in exhaled breath.

[0020] [Display device 30] The display device 30 includes an input display unit 31 as an example of a display unit that displays respiratory system data related to a patient's respiration and blood system data related to the patient's blood. Further, the display device 30 includes a control unit 32 that controls the entire display device 30. And the input display unit 31 is connected to the control unit 32 by wire or wirelessly. As an example, the input display unit 31 is a touch panel that performs display and accepts input. Alternatively, the display unit for performing display and the input unit for accepting input may be separate bodies. For example, the display unit is a liquid crystal display or an organic EL display, and is a single display or a plurality of displays. Also, the input unit is an operation unit including a keyboard, a numeric keypad, or various switches.

[0021] Referring to FIG. 2, the display device 30 includes a main body 38 having a touch panel which is an example of the input display unit 31 as shown in FIG. 2A. The processor and memory constituting the control unit 32 are built in the main body 38. Further, as shown in FIG. 2B, the display device 30 includes a holder 36 that holds the input display unit 31. The display device 30 is fixed to a bed on which a patient lies, a part of the extracorporeal circulation system 100, or a part of the respiratory assist system 200 by the holder 36.

[0022] Furthermore, as shown in FIG. 2C, a plurality of expansion cartridges 39 can be attached to the display device 30. By attaching or replacing the expansion cartridge 39, the types of data displayed by the display device 30 can be added or changed. In this regard, if the displayable data is limited, it is not possible to draw a graph aggregating the data on the display device 30. On the other hand, according to the display device 30, by changing the combination of the expansion cartridges 39, various data can be combined for detection and display. Therefore, various data can be combined to obtain a medically new index. Further, a sensor cable (not shown) can be connected to the expansion cartridge 39. Thereby, even if the extracorporeal circulation system 100 or the respiratory assist system 200 is not connected, respiratory system data and blood system data can be acquired to monitor the patient's condition.

[0023] The control unit 32 has a processor (not shown). As an example, the processor of the control unit 32 is a CPU (Central Processing Unit) or an MPU (Micro-Processing Unit), which controls the entire display device 30 based on a program stored in a memory and also comprehensively controls various processes. Further, the control unit 32 has, as an example of a storage unit, a computer-readable non-transitory recording medium (not shown). And the storage unit stores a control program for the display device 30. Also, the storage unit includes a RAM (Random Access Memory) which is a system work memory for the processor to operate, and storage devices such as a ROM (Read Only Memory), an HDD (Hard Disc Drive), and an SSD (Solid State Drive) for storing programs and system software.

[0024] Note that the control unit 32 can also control the display device 30 according to a program stored in a portable recording medium such as a CD (Compact Disc), a DVD (Digital Versatile Disc), a CF (Compact Flash) card, and a USB (Universal Serial Bus) memory, or an external storage medium such as a server on the Internet. The control program causes the control unit 32 as a computer to function as an acquisition unit 33, a display control unit 34, and a creation unit 35. That is, the control unit 32 has the acquisition unit 33, the display control unit 34, and the creation unit 35 as a logical device realized by a combination of computer hardware and software.

[0025] The acquisition unit 33 acquires respiratory system data from the respiratory assistance system 200 and blood system data from the extracorporeal circulation system 100. For example, the respiratory system data includes data indicating the state of the patient's lungs, such as data detected from the patient's exhalation and data calculated or inferred based on such data. Also, the blood system data includes data indicating the state of the patient's blood, such as data detected from the patient's blood and data calculated or inferred based on such data. Further, the respiratory system data may include at least one of data indicating the change over time of the end-tidal carbon dioxide partial pressure and the respiratory dead space volume. Also, the blood system data may include at least one of the arterial blood carbon dioxide partial pressure and the venous blood carbon dioxide partial pressure. Furthermore, the blood system data may include artificial lung oxygen data indicating the change over time of the oxygen consumption of the artificial lung and artificial lung carbon dioxide data indicating the change over time of the carbon dioxide production of the artificial lung. Also, the respiratory system data may include biological lung oxygen data indicating the change over time of the oxygen consumption of the biological lung and biological lung carbon dioxide data indicating the change over time of the carbon dioxide production of the biological lung.

[0026] Alternatively, the acquisition unit 33 may acquire at least one of the respiratory system data and the blood system data from an external detection device or another medical device that does not constitute the extracorporeal circulation system 100 and the respiratory assistance system 200. Note that the respiratory system data and the blood system data acquired by the acquisition unit 33 and displayed by the input display unit 31 are not limited to the above data.

[0027] Also, the blood system data includes the arterial oxygen partial pressure PaO 2 , the venous oxygen partial pressure PvO 2 , the arterial carbon dioxide partial pressure PaCO 2 , the venous carbon dioxide partial pressure PvCO 2 , the oxygen partial pressure PO 2 , the carbon dioxide partial pressure PCO 2 , the pH of the blood indicating the balance between acids and alkalis, the potassium concentration K+, the sodium concentration Na+, the lactate concentration Lac, the arterial blood temperature Ta, the venous blood temperature Tv, the hematocrit value HCT which is the ratio of red blood cells in the blood, the hemoglobin amount Hgb which is the amount of hemoglobin contained in the blood, and the oxygen saturation SO2 , arterial oxygen saturation SaO 2 , venous oxygen saturation SvO 2 , blood perfusion rate Q which is the flow rate of blood circulating outside the body, transcutaneous arterial oxygen saturation SPO 2 , sweep gas flow rate SWEEP GAS F which is the flow rate of the sweep gas flowing into the artificial lung, sweep gas pressure SWEEP GAS P IN which is the pressure of the sweep gas flowing into the artificial lung, sweep gas pressure SWEEP GAS P OUT which is the pressure of the sweep gas flowing out from the artificial lung, value SWEEP GASΔP obtained by subtracting the sweep gas pressure SWEEP GAS P OUT which is the pressure at the artificial lung sweep gas outlet from the sweep gas pressure SWEEP GAS P IN which is the pressure at the artificial lung sweep gas inlet, sweep gas oxygen concentration SWEEP GAS FIO 2 , blood temperature Temp, blood pressure Press, inlet pressure P IN which is the pressure at the artificial lung inlet, outlet pressure P OUT which is the pressure at the artificial lung outlet, value ΔP obtained by subtracting the artificial lung outlet pressure from the artificial lung inlet pressure, base excess value BE which is the amount of acid that needs to be increased or decreased to return the pH to normal, HCO 3 - concentration, bicarbonate ion concentration HCO 3 -, oxygen consumption VO which is the amount of oxygen consumed per minute 2 , oxygen transport amount DO which is the amount of oxygen transported per minute 2 , oxygen consumption index VO which is the amount of oxygen consumed per minute per body surface area 2 i, oxygen transport index DO which is the amount of oxygen transported per minute per body surface area 2 i, oxygen extraction ratio O which is the ratio of oxygen consumption to oxygen transport amount 2 ER, Ranucci ratio DO which is the ratio of oxygen transport amount to carbon dioxide production amount 2 / VCO 2 , respiratory quotient RQ which is the ratio of carbon dioxide production amount to oxygen consumption amount, anesthetic gas uptake VAA, and resting energy expenditure REE may also be included.

[0028] Furthermore, the blood system data may include data indicating the state of the artificial lung or the patient's biological lung. For example, the data may be the biological lung oxygen consumption V'O2 NL, Biologic lung carbon dioxide production volume V'CO 2 NL, Oxygen consumption volume V'O which is the total oxygen consumption of the artificial lung and the biologic lung 2 TOTAL, Carbon dioxide production volume V'CO which is the total carbon dioxide production of the artificial lung and the biologic lung 2 TOTAL, Oxygen consumption image V'O which is the ratio of the biologic lung oxygen consumption to the total oxygen consumption of the biologic lung and the artificial lung 2 image, Carbon dioxide production image V'CO which is the ratio of the biologic lung carbon dioxide production to the total carbon dioxide production of the biologic lung and the artificial lung 2 image, Artificial lung dead space volume VD ML, Biologic lung dead space volume VD NL, PaO of the artificial lung 2 and FiO 2 ratio P / F ML, PaO of the biologic lung 2 and FiO 2 ratio P / F NL, Artificial lung inlet carbon dioxide concentration SWEEP GAS FICO 2 Artificial lung outlet carbon dioxide concentration SWEEP GAS FECO 2 Artificial lung inlet oxygen concentration SWEEP GAS FIO 2 Artificial lung outlet oxygen concentration SWEEP GAS FEO 2 It may also include artificial lung outlet gas temperature TE, artificial lung outlet body temperature T, artificial lung inlet anesthetic gas concentration FIAA, and artificial lung outlet anesthetic gas concentration FEAA.

[0029] Also, the respiratory system data includes artificial lung oxygen consumption V'O 2 ML, Artificial lung carbon dioxide production volume V'CO 2 ML, Inspiratory volume VI which is the volume of one inspiration, Expiratory volume VE which is the volume of one expiration, Respiratory dead space volume VDresp which is the ineffective ventilation volume without gas exchange, Alveolar ventilation volume VA which is the effective ventilation volume with gas exchange, Mixed expiratory carbon dioxide concentration FECO 2 Carbon dioxide production volume VCO which is the amount of carbon dioxide produced per minute 2 End-tidal carbon dioxide partial pressure ETCO 2 Airway dead space volume VDaw, Alveolar gas carbon dioxide concentration FACO 2, the respiratory rate RR which is the number of breaths per minute, the airway pressure Paw which is the internal pressure applied to the airway, the esophageal pressure Pes which is the internal pressure applied to the esophagus, the transpulmonary pressure PL which is the value obtained by subtracting the esophageal pressure from the airway pressure, PaO 2 and FiO 2 The P / F which is the ratio of, the lung compliance CL which is an index representing the ease of lung inflation, the positive end-expiratory pressure PEEP, the desflurane intake amount DES, the sevoflurane intake amount SEV, and the isoflurane intake amount ISO may be included.

[0030] The display control unit 34 controls the input display unit 31 so that the respiratory system data and the blood system data acquired by the acquisition unit 33 are displayed simultaneously. Also, the display control unit 34 may control the input display unit 31 so that the biological lung oxygen data and the artificial lung oxygen data are displayed side by side. Furthermore, the display control unit 34 may control the input display unit 31 so that the biological lung carbon dioxide data and the artificial lung carbon dioxide data are displayed side by side.

[0031] As an example, in the determination screen for ECMO shown in FIG. 3, a respiratory system data area DA1 for displaying respiratory system data and other areas for displaying blood system data are included and are displayed simultaneously by the input display unit 31. The other areas include a graphic data area DA2, a graph data area DA3, an arterial blood data area DA4, a venous blood data area DA5, an electrolyte data area DA6, a gas / pressure data area DA7, and a lung data area DA8. Although each area in FIG. 3 is indicated by an abbreviation, numerical values are displayed in each area on the actual screen. Alternatively, the display control unit 34 may cause the input display unit 31 to display the numerical values of the data corresponding to each abbreviation on the screen when a medical staff member touches and operates the part indicated by the abbreviation.

[0032] In the graphic data area DA2, the artificial lung oxygen consumption V'O per time series which is an example of artificial lung oxygen data 2 ML, and the biological lung oxygen consumption V'O per time series which is an example of biological lung oxygen data 2An oxygen consumption image in which NL and [the relevant data] are graphed such that their respective ratios are represented by area is being displayed. As a result, the input display unit 31 is displaying the biological lung oxygen data and the artificial lung oxygen data side by side. Also, in the graphic data area DA2, an example of artificial lung carbon dioxide data, the artificial lung carbon dioxide production volume V'CO for each time series 2 ML, and an example of artificial lung carbon dioxide data, the biological lung carbon dioxide production volume V'CO for each time series 2 An image of carbon dioxide production volume in which NL and [the relevant data] are graphed such that their respective ratios are represented by area is being displayed. As a result, the input display unit 31 is displaying the biological lung carbon dioxide data and the artificial lung carbon dioxide data side by side. Note that "NL" is an abbreviation indicating the biological lung, and "ML" is an abbreviation indicating the artificial lung.

[0033] In the graph data area DA3, the artificial lung dead space volume VD ML for each time series and the biological lung dead space volume VD NL for each time series are being displayed. Note that the horizontal axis of the graphic data area DA2 and the graph data area DA3 is the number of days (day), but it may also be the number of hours (hour).

[0034] The determination screen shown in FIG. 3 provides medical staff with data for determining whether to remove ECMO from the patient. That is, on the determination screen, blood system data and respiratory system data related to the gas exchange of the biological lung are displayed on one screen. As a result, in addition to monitoring the blood system data by detecting blood gas, the determination screen has a function of monitoring the respiratory system data indicating the state of the patient's biological lung. Therefore, medical staff can continuously monitor changes in the gas exchange situation of the living body. And since medical staff can easily monitor changes in the biological lung and the artificial lung, they can perform safe extracorporeal circulation.

[0035] Normally, in order to maintain the body, a person takes in oxygen by breathing according to their oxygen demand corresponding to their age, gender, and physical build, and excretes carbon dioxide. The gas exchange function of the living body's lungs may be severely impaired by viral pneumonia or the like. In this case, a ventilator is used to assist the living body's lung function. If the pneumonia worsens further, appropriate gas exchange cannot be maintained only with a ventilator. Therefore, ECMO is used to maintain gas exchange. ECMO mainly includes VA-ECMO that performs two types of assistance, respiration and circulation, and VV-ECMO that only performs respiratory assistance. Then, VA-ECMO or VV-ECMO is selected according to the patient's condition. Here, in cases where only the lungs are severely affected, such as in viral pneumonia, VV-ECMO aimed at resting the living body's lungs (lung rest) is selected.

[0036] In VV-ECMO, venous drainage and venous blood delivery are performed, and the locations of blood delivery and drainage are inevitably in the vicinity. As a result, recirculation occurs where oxygenated blood and non-oxygenated blood mix, reducing the gas exchange efficiency of the artificial lung. Also, in order to maintain the state where the alveoli of the living body's lungs are inflated, gas exchange by the living body's lungs is also maintained at a minimum. Therefore, gas exchange when performing VV-ECMO is carried out by both the artificial lung and the living body's lungs. Therefore, in order to maintain the optimal gas exchange state for the patient, it is necessary to monitor and manage the states of both the artificial lung and the living body's lungs. In this regard, on the judgment screen, blood system data and respiratory system data are displayed on one screen. As a result, both pieces of data can be monitored on a single display device 30, facilitating the management of patients who require extracorporeal circulation.

[0037] In particular, on the judgment screen, the start timing of starting the treatment by ECMO, the end timing of ending the treatment by ECMO, and the change timing of the patient's condition can be judged on one screen. Specifically, with reference to FIG. 3, the start timing, end timing, and change timing will be described. For the sake of convenience of explanation, in FIG. 3, in the graphic data area DA2, the first state TR1, the second state TR2, and the third state TR3 are shown as straight lines with arrows.

[0038] The state of the patient transitions from a first state TR1 in which the biological lung deteriorates and oxygenation becomes insufficient to a second state TR2 in which oxygenation is assisted by an artificial lung. Further, the state of the patient transitions from the second state TR2 to a third state TR3 in which the biological lung recovers and switches to oxygenation by the biological lung. In the first state TR1 and the third state TR3, assistance is provided by a ventilator. And in the second state TR2, in addition to the ventilator, assistance is provided by ECMO. And in the graphic data area DA2, the boundary between the first state TR1 and the second state TR2 is the change timing and the start timing. Also, the boundary between the second state TR2 and the third state TR3 is the change timing and the end timing. Therefore, medical staff can determine the start and end of the treatment by ECMO while looking at the judgment screen.

[0039] For example, the display device 30 simultaneously displays, as respiratory system data, at least one of a graph showing the change over time of the end-tidal carbon dioxide partial pressure ETCO 2 and the respiratory dead space volume VDresp, and as blood system data, at least one of the arterial blood carbon dioxide partial pressure PaCO 2 and the venous blood carbon dioxide partial pressure PvCO 2 . By knowing the respiratory dead space volume, it is possible to grasp the degree of pneumonia or inflammation, that is, the state of the biological lung, without performing a CT scan. Thereby, by displaying the respiratory system data and the blood system data on one screen, it is possible to determine the start timing or the end timing of ECMO. Also, medical staff can visually grasp the correlation between the respiratory system data and the blood system data. Note that the blood system data may also show changes over time not only by numerical values but also, for example, by a graph or the like.

[0040] On the one hand, if the monitor for monitoring blood system data and the monitor for monitoring respiratory system data are separate, medical staff will have to monitor each monitor. In this case, medical staff need to comprehensively consider each of the blood system data and the respiratory system data. Moreover, medical staff need to determine the start timing and end timing of ECMO and determine whether extracorporeal circulation is being properly performed. Therefore, it is difficult to compare blood system data and respiratory system data. Also, it is impossible to continuously view blood system data and respiratory system data, and extracorporeal circulation will be managed depending on the experience and skills of medical staff.

[0041] As shown in FIG. 3, a button area BT is provided on the judgment screen. And in the button area BT, a respiratory system screen button displayed as "ONLY Respiration", a blood system screen button displayed as "Pressure Blood Gas", and a judgment screen button displayed as "ECMO Judgment" are displayed. When a medical staff touches and operates the judgment screen button, the judgment screen is displayed. Also, when a medical staff touches and operates the respiratory system screen button, the respiratory system screen shown in FIG. 4 is displayed.

[0042] As shown in FIG. 4, on the respiratory system screen, instead of the graphic data area DA2 and the graph data area DA3 of the judgment screen, a respiratory graph area RA1 and an RA2 are provided. In the respiratory graph area RA1, a graph showing the change over time of the airway pressure Paw, the esophageal pressure Pes, and the transpulmonary pressure PL is displayed. Also, in the respiratory graph area RA2, a graph showing the change over time of the end-tidal carbon dioxide partial pressure ETCO 2 is displayed.

[0043] Also, when a medical staff member touches the blood system screen button, the blood system screen shown in FIG. 5 is displayed. In the blood system screen, instead of the graphic data area DA2 and the graph data area DA3 of the judgment screen, a numerical value area RA3 where numerical values such as blood flow rate are displayed is provided. Note that although it is shown by abbreviations in the numerical value area RA3 of FIG. 5, numerical values are displayed in each area on the actual screen. Alternatively, the display control unit 34 may display the numerical values of the data corresponding to each abbreviation on the screen when the medical staff member touches and operates the part shown by the abbreviation.

[0044] Returning to FIG. 1, the creation unit 35 creates a graph showing the temporal changes in the airway pressure Paw, the esophageal pressure Pes, and the transpulmonary pressure PL, and a graph showing the temporal changes in the end-tidal carbon dioxide partial pressure. Also, the creation unit 35 creates an oxygen consumption amount image and a carbon dioxide production amount image. Further, the creation unit 35 may create a graph or an image showing temporal changes based on the respiratory system data or the blood system data.

[0045] [Screen Display Processing] Referring to FIG. 6, the screen display processing will be described. First, the display control unit 34 causes the judgment screen (FIG. 3) to be displayed on the input display unit 31 (S101). Then, when the medical staff member touches and operates the respiratory system screen button (YES in S102), the display control unit 34 causes the respiratory system screen (FIG. 4) to be displayed on the input display unit 31 (S103). On the other hand, when the medical staff member does not touch and operate the respiratory system screen button (NO in S102) and touches and operates the blood system screen button (YES in S104), the display control unit 34 causes the blood system screen (FIG. 5) to be displayed on the input display unit 31 (S105). Further, when the medical staff member touches and operates the judgment screen button (YES in S106), the display control unit 34 causes the judgment screen to be displayed on the input display unit 31 (S101). When the medical staff member does not touch and operate the judgment screen button (NO in S106), the display of the screen is not changed and the screen display processing ends.

[0046] According to the display device 30 described above, respiratory data and blood system data can be monitored on one screen, facilitating the management of patients who require extracorporeal circulation. Also, although the present invention has been described with reference to each embodiment, the present invention is not limited to the above embodiments. Inventions modified within the scope not contrary to the present invention, and inventions equivalent to the present invention are also included in the present invention. Further, each embodiment and each modified form can be appropriately combined within the scope not contrary to the present invention.

[0047] For example, the display of respiratory data can also be used when diagnosing COPD (Chronic Obstructive Pulmonary Disease) or ARDS (Acute Respiratory Distress Syndrome).

Explanation of Reference Numerals

[0048] 30: Display device 31: Input display unit (display unit) 34: Display control unit 300: Monitor system

Claims

1. A display device of a monitoring system for monitoring a patient's condition, comprising: a display unit that displays respiratory system data related to the patient's respiration and blood system data related to the patient's blood; a display control unit that controls the display unit so that the respiratory system data and the blood system data are displayed simultaneously; the blood system data includes artificial lung carbon dioxide data indicating a change over time in the carbon dioxide production amount of an artificial lung; the respiratory system data includes biological lung carbon dioxide data indicating a change over time in the carbon dioxide production amount of a biological lung; the display control unit graphically represents the biological lung carbon dioxide data and the artificial lung carbon dioxide data such that respective ratios to the total production amount are represented by areas, and causes the display unit to display the data, the display device.

2. the respiratory system data includes data indicating the state of the patient's lungs; the blood system data includes data indicating the state of the patient's blood, the display device according to claim 1.

3. the respiratory system data includes at least one of a graph indicating a change over time in the end-tidal carbon dioxide partial pressure and the respiratory dead space volume, the display device according to claim 1 or 2.

4. the blood system data includes at least one of the arterial blood carbon dioxide partial pressure and the venous blood carbon dioxide partial pressure, the display device according to any one of claims 1 to 3.

5. A display device of a monitoring system for monitoring a patient's condition, comprising: a display unit that displays respiratory system data related to the patient's respiration and blood system data related to the patient's blood; a display control unit that controls the display unit so that the respiratory system data and the blood system data are displayed simultaneously; the blood system data includes artificial lung oxygen data indicating a change over time in the oxygen consumption amount of an artificial lung; the respiratory system data includes biological lung oxygen data indicating a change over time in the oxygen consumption amount of a biological lung; the display control unit graphically represents the biological lung oxygen data and the artificial lung oxygen data such that respective ratios to the total consumption amount are represented by areas, and causes the display unit to display the data, the display device.

6. The display control unit controls the display unit so that at least one of a boundary between a state of insufficient oxygenation and a state in which oxygenation is assisted by the artificial lung, and a boundary between a state in which the assistance is being performed and a state in which the oxygenation is switched from the state in which the assistance is being performed to oxygenation by the biological lung is displayed simultaneously with the respiratory data and the blood data. The display device according to any one of claims 1 to 5.

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