Infection risk assessment support device and infection risk assessment support program

Abstract

To provide an infection risk evaluation support device and program capable of supporting the evaluation of an infection risk for infectious diseases even a state before constructing a medical facility.SOLUTION: An infection risk evaluation support device 10 includes an acquisition part 11A for acquiring design condition related information related to design conditions of a building, infection disease related information related to an infection disease to be an evaluation object, equipment cost related information related to cost of equipment to be applied to perform at least one of ventilation and air cleaning in the building, and air amount related information related to an air amount for performing at least one of the ventilation and the air cleaning by the equipment, a derivation part 11B for deriving the number of applied equipment, the air amount for performing at least one of the ventilation and the air cleaning, infection risk information by an infection disease in the building in each of cases of applying a plurality of different conditions about at least one of the design conditions of the building, and introduction cost information required to introduce the equipment by using the acquired information, and a presentation part 11C for presenting the derived information.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] This invention relates to an infection risk assessment support device and an infection risk assessment support program. [Background technology]

[0002] In recent years, with the global spread of COVID-19, there has been a growing demand for technologies that can accurately assess the risk of infection in healthcare facilities.

[0003] Traditionally, the following technologies have been used to contribute to the assessment of infection risk for infectious diseases.

[0004] Patent Document 1 discloses an in-facility monitoring system aimed at monitoring the environmental conditions within a facility and identifying the risk of disease outbreaks caused by those environmental conditions.

[0005] This facility monitoring system includes a display unit that displays a layout diagram showing the locations of multiple sections within the facility, and sensors provided in each section that measure environmental parameters related to the risk of disease occurrence. Furthermore, this facility monitoring system includes a control unit that generates display data to display the environmental state representing the risk of disease occurrence in each section on the layout diagram, based on the measured values ​​of the environmental parameters output from the sensors.

[0006] Furthermore, Patent Document 2 discloses a method for quantifying infection risk that aims to probabilistically quantify infection risk by incorporating and unifying epidemiological data, including community transmission status, as input information (input parameters used in a mathematical model), in addition to environmental data measured within a facility.

[0007] This infection risk quantification method is an infection risk quantification method for evaluating the infection risk of at least one section within a facility, comprising a measurement step of measuring the CO2 concentration inside the section while simultaneously measuring the CO2 concentration outside the facility, and the number of reported cases of at least one infectious disease in the area to which the facility belongs, obtained from an epidemiological data viewing site. r The system includes the steps of acquiring CO2 values ​​as needed and deriving the probability of infection P in the compartment as needed using a mathematical model that includes the CO2 concentration in the compartment and the CO2 concentration outside the facility. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2019-79136 [Patent Document 2] Patent No. 6967329 [Overview of the project] [Problems that the invention aims to solve]

[0009] However, the technologies disclosed in Patent Documents 1 and 2 have the problem that, although they can be used when medical facilities are in operation, they cannot support the assessment of infection risk in pre-construction stages such as the planning or design phases of medical facilities.

[0010] This disclosure is made in light of the above circumstances and aims to provide an infection risk assessment support device and an infection risk assessment support program that can support the assessment of infection risk against infectious diseases even at the stage before the construction of a medical facility. [Means for solving the problem]

[0011] The infection risk assessment support device according to claim 1 of the present invention comprises: an acquisition unit that acquires design condition-related information relating to the design conditions of a building to be evaluated, infection-related information relating to an infectious disease to be evaluated, equipment cost-related information relating to the cost of equipment applied to perform at least one of ventilation and air purification in the building, and air volume-related information relating to the amount of air that is ventilated and air purified by the equipment; an extraction unit that uses the information acquired by the acquisition unit to derive infection risk information indicating the risk of infection by the infectious disease inside the building and introduction cost information indicating the cost required to introduce the equipment, for each case in which a plurality of different conditions are applied to the number of equipment to be applied, the amount of air that is ventilated and air purified, and at least one of the design conditions of the building; and a presentation unit that presents the infection risk information and introduction cost information derived by the extraction unit. The air volume-related information includes the number of units of the equipment required per bed room in the building. .

[0012] According to the infection risk assessment support device of the present invention as described in claim 1, design condition-related information regarding the design conditions of the building to be evaluated, infection-related information regarding the infectious disease to be evaluated, equipment cost-related information regarding the cost of equipment applied to perform at least one of ventilation and air purification in the building, and air volume-related information regarding the amount of air that is ventilated and air purified by the equipment, the device acquires the acquired information and derives infection risk information indicating the risk of infection by the infectious disease inside the building and introduction cost information indicating the cost required to introduce the equipment for each case in which multiple different conditions are applied to the number of equipment to be applied, the amount of air that is ventilated and air purified, and at least one of the design conditions of the building, and presents the derived infection risk information and introduction cost information, thereby supporting the assessment of infection risk to infectious diseases even at the stage before the construction of a medical facility.

[0013] The infection risk assessment support device according to the present invention described in claim 2 is the infection risk assessment support device described in claim 1, wherein the design condition-related information includes at least one of the volume of the room provided in the building, the number of hospital beds for use by infected persons in the room, and the number of medical staff entering the room, the infectious disease-related information includes the quanta generation rate, the equipment cost-related information includes at least one of the price of the equipment, the installation cost of the equipment, and the running cost of the equipment, and the air volume-related information includes at least one of the ventilation rate by outside air per unit time and the ventilation rate by circulation per unit time.

[0014] According to the infection risk assessment support device according to the present invention described in claim 2, the design condition-related information includes at least one of the volume of the room provided in the building, the number of hospital beds for use by infected persons in the room, and the number of medical staff entering the room, the infectious disease-related information includes the quanta generation rate, the equipment cost-related information includes at least one of the price of the equipment, the installation cost of the equipment, and the running cost of the equipment, and the air volume-related information includes at least one of the ventilation rate by outside air per unit time and the ventilation rate by circulation per unit time. By using the included information, infection risk information and introduction cost information can be derived.

[0015] The infection risk assessment support device according to the present invention described in claim 3 is the infection risk assessment support device described in claim 1 or claim 2, wherein the acquisition unit further acquires priority information indicating which of the infection risk information and the introduction cost information is to be prioritized, and the presentation unit presents the infection risk information and the introduction cost information in a state arranged in ascending or descending order with respect to the information indicated by the priority information acquired by the acquisition unit.

[0016] According to the infection risk assessment support device of the present invention as described in claim 3, by further acquiring priority information indicating which information, infection risk information or implementation cost information, should be prioritized, and presenting the infection risk information and implementation cost information in ascending or descending order based on the information indicated by the acquired priority information, the convenience for the user can be further improved.

[0017] The infection risk assessment support program according to claim 4 of the present invention acquires design condition-related information regarding the design conditions of the building to be evaluated, infection-related information regarding the infectious disease to be evaluated, equipment cost-related information regarding the cost of equipment applied to perform at least one of ventilation and air purification in the building, and air volume-related information regarding the amount of air that is ventilated and air purified by the equipment. Using the acquired information, the program derives infection risk information indicating the risk of infection by the infectious disease inside the building and introduction cost information indicating the cost required to introduce the equipment, for each case in which multiple different conditions are applied to the number of equipment applications, the amount of air that is ventilated and air purified, and at least one of the design conditions of the building, and presents the derived infection risk information and introduction cost information. The process includes the number of units of the equipment required per bed room in the building, Have the computer perform the process.

[0018] According to the infection risk assessment support program of the present invention as described in claim 4, design condition-related information regarding the design conditions of the building to be evaluated, infection-related information regarding the infectious disease to be evaluated, equipment cost-related information regarding the cost of equipment applied to perform at least one of ventilation and air purification in the building, and air volume-related information regarding the amount of air that is ventilated and air purified by the equipment are obtained, and using the obtained information, infection risk information indicating the risk of infection by the infectious disease inside the building and introduction cost information indicating the cost required to introduce the equipment are derived for each case in which multiple different conditions are applied to the number of equipment to be applied, the amount of air that is ventilated and air purified, and at least one of the design conditions of the building, and the derived infection risk information and introduction cost information are presented, thereby supporting the assessment of infection risk to infectious diseases even at the stage before the construction of a medical facility. [Effects of the Invention]

[0019] As described above, the present invention can support the assessment of infection risk from infectious diseases even at the stage before the construction of a medical facility. [Brief explanation of the drawing]

[0020] [Figure 1] This block diagram shows an example of the hardware configuration of an infection risk assessment support device according to an embodiment. [Figure 2] This block diagram shows an example of the functional configuration of an infection risk assessment support device according to an embodiment. [Figure 3] This is a schematic diagram showing an example of the configuration of a cost information database according to the embodiment. [Figure 4] This is a flowchart showing an example of infection risk assessment support processing according to the embodiment. [Figure 5] This is a front view showing an example of the configuration of the patient room type input screen according to the embodiment. [Figure 6] This is a front view showing an example of the configuration of the first design condition-related information input screen according to the embodiment. [Figure 7] This is a front view showing an example of the configuration of an infectious disease-related information input screen according to the embodiment. [Figure 8] This is a front view showing an example of the configuration of the second design condition-related information input screen according to the embodiment. [Figure 9] This is a front view showing an example of the configuration of the air volume-related information input screen according to the embodiment. [Figure 10] This is a front view showing an example of the configuration of the priority setting screen according to the embodiment. [Figure 11] This is a front view showing an example of the configuration of the evaluation support information display screen according to the embodiment. [Figure 12] This is a front view showing an example of the configuration of the detailed information display screen according to the embodiment. [Figure 13] This graph shows a comparison between the method according to the embodiment and the conventional method. [Modes for carrying out the invention]

[0021] Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

[0022] First, the configuration of the infection risk assessment support device 10 according to this embodiment will be described with reference to Figures 1 and 2. Figure 1 is a block diagram showing an example of the hardware configuration of the infection risk assessment support device 10 according to this embodiment. Figure 2 is a block diagram showing an example of the functional configuration of the infection risk assessment support device 10 according to this embodiment. Examples of the infection risk assessment support device 10 include information processing devices such as personal computers and server computers.

[0023] As shown in Figure 1, the infection risk assessment support device 10 according to this embodiment includes a CPU (Central Processing Unit) 11, a memory 12 as a temporary storage area, a non-volatile storage unit 13, an input unit 14 such as a keyboard and mouse, a display unit 15 such as a liquid crystal display, a media read / write device (R / W) 16, and a communication interface (I / F) unit 18. The CPU 11, memory 12, storage unit 13, input unit 14, display unit 15, media read / write device 16, and communication I / F unit 18 are connected to each other via bus B1. The media read / write device 16 reads information written on the recording medium 17 and writes information to the recording medium 17.

[0024] The storage unit 13 is implemented by an HDD (Hard Disk Drive), SSD (Solid State Drive), flash memory, etc. The storage unit 13, as a storage medium, stores the infection risk assessment support program 13A. The infection risk assessment support program 13A is stored in the storage unit 13 when a recording medium 17 on which the infection risk assessment support program 13A is written is set in a media read / write device 16, and the media read / write device 16 reads the infection risk assessment support program 13A from the recording medium 17. The CPU 11 reads the infection risk assessment support program 13A from the storage unit 13, loads it into memory 12, and sequentially executes the processes contained in the infection risk assessment support program 13A.

[0025] Furthermore, the memory unit 13 stores the cost information database 13B. The cost information database 13B will be described in detail later.

[0026] Next, with reference to Figure 2, the functional configuration of the infection risk assessment support device 10 according to this embodiment will be described. As shown in Figure 2, the infection risk assessment support device 10 includes an acquisition unit 11A, an output unit 11B, and a presentation unit 11C. The CPU 11 of the infection risk assessment support device 10 executes the infection risk assessment support program 13A, thereby enabling the acquisition unit 11A, the output unit 11B, and the presentation unit 11C to function.

[0027] The acquisition unit 11A according to this embodiment acquires design condition-related information regarding the design conditions of the building to be evaluated (hereinafter referred to as the "target building"), and infection-related information regarding the infectious disease to be evaluated (hereinafter referred to as the "target infectious disease"). In addition, the acquisition unit 11A according to this embodiment acquires equipment cost-related information regarding the cost of equipment applied to perform at least one of ventilation and air purification in the target building (in this embodiment, ventilation equipment having an air purification function, hereinafter simply referred to as the "ventilation equipment" or "target equipment"), and air volume-related information regarding the amount of air ventilated or purified by the target equipment. Hereinafter, air purification operation by circulation due to the air purification function will also be referred to as "ventilation".

[0028] In this embodiment, the design condition-related information includes, but is not limited to, the volume of a room in the target building, the number of beds available for infected persons in that room, and the number of medical personnel entering that room. For example, one or a combination of these pieces of information may be included in the design condition-related information.

[0029] Furthermore, while this embodiment includes the quanta generation rate in the infectious disease-related information, it is not limited to this. For example, other information related to the target infectious disease may be included in the infectious disease-related information instead of the quanta generation rate.

[0030] Furthermore, in this embodiment, the equipment cost-related information includes the price of the target equipment and the installation costs of the target equipment, but this is not the only form. For example, only one of these pieces of information may be included in the equipment cost-related information.

[0031] Furthermore, in this embodiment, the air volume-related information includes information on the number of ventilation cycles per unit time by outside air and the number of ventilation cycles per unit time by circulation, but it is not limited to this. For example, only one of these pieces of information may be included in the air volume-related information.

[0032] Note that "air exchange rate" here refers to the amount of ventilation per unit time. Specifically, it means the value obtained by dividing the amount of air flowing into the room per hour (= ventilation rate) by the volume of the room. For example, in a room with a floor width of 5m, a depth of 4m, and a height of 3m, the volume is 60m³. 3 )(=5×4×3), but in this case, the ventilation rate per hour is 120(m 3 If the ventilation rate is 2 (times / hour) (=120 / 60), then the ventilation rate will be 2 (times / hour) (=120 / 60).

[0033] Furthermore, the derivation unit 11B according to this embodiment uses the information acquired by the acquisition unit 11A to derive infection risk information indicating the risk of infection by the target infectious disease inside the target building, and introduction cost information indicating the cost required to introduce the target equipment, for each case in which multiple different conditions are applied to at least one of the number of target equipment applications, the amount of air ventilated, and the design conditions of the target building.

[0034] The presentation unit 11C according to this embodiment presents the infection risk information and introduction cost information derived by the derivation unit 11B. In this embodiment, the presentation by the presentation unit 11C is presented by display by a display unit, but this is not the only method. For example, presentation by printing using an image forming apparatus or presentation by sound using a sound generation device may be applied as the presentation by the presentation unit 11C.

[0035] Furthermore, the acquisition unit 11A according to this embodiment acquires priority information indicating which of the infection risk information and the implementation cost information should be prioritized. The presentation unit 11C according to this embodiment then presents the infection risk information and the implementation cost information in ascending or descending order, based on the information indicated by the priority information acquired by the acquisition unit 11A.

[0036] Here, we will explain the method for deriving infection risk information using the derivation unit 11B according to this embodiment.

[0037] In this embodiment, the infection risk information is derived in the following three steps.

[0038] <The first step>

[0039] Based on the Wells-Riley model shown in the following formula (1), the infection risk value (infection probability) P0 per hour for one medical worker is calculated. In formula (1), Q (m 3 / h) represents the effective ventilation volume, I (person) represents the number of infected persons, q (quanta / h) represents the quanta generation rate (infectious particle generation rate), p (m 3 / h·person) represents the breathing rate (breathing volume per person), and t (h) represents the stay time.

[0040]

Number

[0041] [[ID=XX]] Here, the effective ventilation volume Q may also be calculated by the following formula (2) referring to "Rethinking Ventilation Design as a Measure against Infectious Diseases" (The 54th Building Equipment Technology Conference 2021, Takashi Kurabuchi (Tokyo University of Science)). In formula (2), Q OA represents the ventilation volume by outdoor air, Q fltr represents the equivalent ventilation volume due to the filtration effect of the air filter, Q <XXXX>represents the equivalent ventilation volume related to removal by gravitational sedimentation, Q <XXXX>represents the ventilation volume conversion amount of the inactivation effect, and all units are (m 3 / h).

[0042] <000021-3>

Number

[0043] However, for simplicity, in the following, the effective ventilation volume Q will be calculated by the following formula (3).

[0044]

Number

[0045] It should be noted that the content marked as <XXXX> in the original text seems to be incomplete or incorrect tags. I have translated it as best as possible according to the context. If there are more specific requirements or corrections for these parts, please let me know. The amount of ventilation Q due to outside air is calculated by multiplying the room volume V by the number of air changes N1 due to outside air. OA The room volume V, the ventilation rate N2 by circulation, and the filtration rate or sterilization rate P are all considered. s By multiplying by this, the equivalent ventilation volume Q due to the filtration effect of the air filter is obtained. fltr This can be calculated. Furthermore, to account for the collection efficiency N due to the mask, the quanta generation rate q is changed to q × (1-N).

[0046] Substituting the above into equation (1) yields equation (4).

[0047]

number

[0048] Here, p is the respiratory rate, and it is necessary to set a value according to the person's activity level. It is also possible to directly input the respiratory rate p into the infection risk assessment support device 10, but in the embodiment shown below, the activity level of the patient in the hospital bed is assumed to be very light work, and a value set in advance in the infection risk assessment support device 10 is used.

[0049] Using values ​​pre-set in the infection risk assessment support device 10, the respiratory rate p = 0.6(m 3 The value will be set to / h·person). Other parameters will use values ​​set by the user through the infection risk assessment support process described later (see also Figure 4).

[0050] For example, I=1 (person), q=10 (quanta / h), N=95 (%), V=50 (m 3 ), N1=2(times / h), N2=10(times / h), P S If we set it to =50(%), the infection risk value P0 calculated by formula (4) will be as follows:

[0051]

number

[0052] <Phase 2>

[0053] In order to evaluate the infection risk for one healthcare worker from the infection risk value P0 per hour per healthcare worker calculated in the first stage, the evaluation period E P Infection risk value P corresponding to the risk of infection hc This is calculated based on the following formula (5).

[0054] Here, the length of stay is T, and the evaluation period is E. P This uses a value set by the user through the infection risk assessment support process described later.

[0055]

number

[0056] For example, P0 = 0.086 (%), T = 2 (h), E P If = 80 (days), the infection risk value P is calculated from equation (5). hc It will be as follows:

[0057]

number

[0058] <Phase 3>

[0059] In order to assess the infection risk for the entire hospital, based on the infection risk value P0 per hour per healthcare worker calculated in the first stage, the number of healthcare workers I N and evaluation period E P Infection risk value P corresponding to the risk of infection all This is calculated based on equation (6). Here, the number of healthcare workers I N , duration of stay T, evaluation period E P This uses a value set by the user through the infection risk assessment support process described later.

[0060]

number

[0061] For example, P0 = 0.086 (%), I N =10(people), T=2(h), E P If = 80 (days), the infection risk value P is calculated from equation (5). all It will be as follows:

[0062]

number

[0063] Next, with reference to Figure 3, the cost information database 13B according to this embodiment will be described. Figure 3 is a schematic diagram showing an example of the configuration of the cost information database 13B according to this embodiment.

[0064] As shown in Figure 3, the cost information database 13B according to this embodiment stores item, subject, and cost information in an associated manner.

[0065] The above items indicate the items covered in the introduction costs described above. In this embodiment, two types of costs are applied: equipment costs related to ventilation equipment (hereinafter simply referred to as "equipment costs") and construction costs for each type of patient room (hereinafter simply referred to as "construction costs"). However, this is not the only form; either equipment costs or construction costs may be applied as the introduction costs, or other costs such as the running costs of the ventilation equipment may be applied as the introduction costs in addition to these costs.

[0066] Furthermore, the above-mentioned "target" is information indicating the object being targeted, and the above-mentioned "cost" is information indicating the cost of the corresponding target itself. In this embodiment, the cost is calculated as the cost per unit (per room) of the corresponding target, but it goes without saying that this is not the only option.

[0067] In the example shown in Figure 3, for instance, the price per unit of equipment A in the ventilation system is 100,000 yen, and the installation cost per unit is 50,000 yen. It also shows, for example, that the construction cost per room for a single-bed room is 4,000,000 yen.

[0068] Next, the operation of the infection risk assessment support device 10 according to this embodiment will be explained with reference to Figures 4 to 13. Figure 4 is a flowchart showing an example of the infection risk assessment support process according to this embodiment.

[0069] When a user issues an instruction via the input unit 14 to start the execution of the infection risk assessment support program 13A, the CPU 11 of the infection risk assessment support device 10 executes the infection risk assessment support program 13A. The execution of this infection risk assessment support program 13A performs the infection risk assessment support process shown in Figure 4. For the sake of avoiding confusion, this explanation assumes that the cost information database 13B has already been established.

[0070] In step 100 of Figure 4, the CPU 11 reads all information (hereinafter referred to as "cost information") from the cost information database 13B.

[0071] In step 102, the CPU 11 controls the display unit 15 to display a patient room type input screen with a predetermined configuration, and in step 104, the CPU 11 waits until predetermined information is entered.

[0072] Figure 5 shows an example of the patient room type input screen according to this embodiment. As shown in Figure 5, the patient room type input screen according to this embodiment displays a message prompting the user to set the type of patient bed. In addition, the patient room type input screen displays a designation section 15A1 which is specified when setting at least one type of patient room, such as a 1-bed room, a 2-bed room, and a 4-bed room. Furthermore, when setting a patient room with a number of beds other than a 1-bed room, a 2-bed room, and a 4-bed room, the patient room type input screen displays a patient room setting frame 15A2 for inputting the number of beds in that patient room.

[0073] As an example, when the room type input screen shown in Figure 5 is displayed on the display unit 15, the user, via the input unit 14, selects the corresponding designation unit 15A1 if they wish to apply at least one type of room: a 1-bed room, a 2-bed room, or a 4-bed room. If the user wishes to apply a room with a different number of beds, they enter the number of beds they wish to set into the room setting frame 15A2. Once the user has finished setting the type of room they wish to apply, they select the confirm button 15K displayed on the room type input screen via the input unit 14. Accordingly, step 104 becomes a positive determination, and the process proceeds to step 106.

[0074] In step 106, the CPU 11 controls the display unit 15 to display a first design condition-related information input screen configured in advance, and in step 108, the CPU 11 waits until predetermined information is entered.

[0075] Figure 6 shows an example of the first design condition-related information input screen according to this embodiment. As shown in Figure 6, the first design condition-related information input screen according to this embodiment displays a message prompting the user to set the number of patient rooms for each case under consideration and for each type of patient room, as well as the size of each type of patient room. In addition, on this first design condition-related information input screen, an input box 15B1 is displayed for inputting the number of patient rooms for each case under consideration, for each type of patient room to be applied as set on the patient room type input screen, and an input box 15B2 is displayed for inputting information indicating the floor area and height of each type of patient room.

[0076] As an example, when the first design condition-related information input screen shown in Figure 6 is displayed on the display unit 15, the user inputs the number of patient rooms for each type of patient room they have set into the corresponding input field 15B1 via the input unit 14. The user also inputs information indicating the floor area and height of each patient room type into the corresponding input field 15B2 via the input unit 14, and then presses the confirm button 15K. Accordingly, step 108 becomes a positive judgment, and the process moves to step 110.

[0077] In step 110, the CPU 11 controls the display unit 15 to display an infectious disease-related information input screen configured in advance, and in step 112, the CPU 11 waits until predetermined information is entered.

[0078] Figure 7 shows an example of an infectious disease-related information input screen according to this embodiment. As shown in Figure 7, the infectious disease-related information input screen according to this embodiment displays a message prompting the user to set the type of infectious disease and parameters. In addition, this infectious disease-related information input screen displays a selection box 15C1 for selecting the target infectious disease to be applied from existing infectious diseases, and an input box 15C2 for inputting the quanta generation rate, inactivity time, and collection rate of the medical mask for the target infectious disease to be applied.

[0079] As an example, when the infectious disease-related information input screen shown in Figure 7 is displayed on the display unit 15, the user selects the target infectious disease to be applied using the selection box 15C1 via the input unit 14. The user also enters the values ​​for the quanta generation rate, inactivity time, and medical mask collection rate parameters into the corresponding input boxes 15C2, and then presses the confirm button 15K. Accordingly, step 112 becomes a positive judgment, and the process proceeds to step 114.

[0080] In step 114, the CPU 11 controls the display unit 15 to display a second design condition-related information input screen configured in advance, and in step 116, the CPU 11 waits until predetermined information is entered.

[0081] Figure 8 shows an example of the second design condition-related information input screen according to this embodiment. As shown in Figure 8, the second design condition-related information input screen according to this embodiment displays messages prompting the user to set various parameters. In addition, this second design condition-related information input screen displays input fields 15D for inputting the infection risk assessment period, the number of healthcare workers who come into contact with patients in the hospital bed, and the average daily stay time of healthcare workers in the hospital room.

[0082] As an example, when the second design condition-related information input screen shown in Figure 8 is displayed on the display unit 15, the user inputs the infection risk assessment period, the number of healthcare workers who come into contact with the patient in the hospital bed, and the average daily stay time of healthcare workers in the hospital room into the corresponding input fields 15D via the input unit 14. The user then selects the confirm button 15K. Accordingly, step 116 becomes a positive judgment, and the process proceeds to step 118.

[0083] In step 118, the CPU 11 controls the display unit 15 to display an air volume-related information input screen configured in advance, and in step 120, the CPU 11 waits until predetermined information is entered.

[0084] Figure 9 shows an example of the air volume-related information input screen according to this embodiment. As shown in Figure 9, the air volume-related information input screen according to this embodiment displays a message prompting the user to set conditions related to the air volume (ventilation rate) for each case under consideration. In addition, for each case under consideration, this air volume-related information input screen displays a selection frame 15E1 for selecting the ventilation equipment to be applied from existing ventilation equipment, and an input frame 15E2 for inputting parameters indicating the performance of the ventilation equipment. In this embodiment, the parameters used to indicate the performance of the ventilation equipment are the number of times the air is circulated with the outside air, the number of times the air is circulated, the filtration rate by the filter or the sterilization rate by ultraviolet light during circulation, and the number of ventilation equipment units required per bed room. However, it goes without saying that the parameters indicating the performance of the ventilation equipment are not limited to these.

[0085] As an example, when the air volume-related information input screen shown in Figure 9 is displayed on the display unit 15, the user selects the ventilation equipment to be applied for each case under consideration using the selection frame 15E1 via the input unit 14. The user then enters the parameter values ​​indicating the performance of the selected ventilation equipment into the corresponding input frame 15E2, and then presses the confirm button 15K. Accordingly, step 120 becomes a positive judgment, and the user proceeds to step 122.

[0086] In step 122, the CPU 11 uses the various information set by the user to derive various infection risk values ​​for each assumed case of consideration, following the procedure described above. Also in step 122, the CPU 11 uses the cost information read out by the process in step 100 to derive the implementation cost for each assumed case of consideration. At this time, the CPU 11 calculates the maximum number of patients and the number of medical personnel required from the types of patient rooms set by the user and the number of patient rooms of each type, and uses these values ​​to derive various infection risk values. Also at this time, the CPU 11 uses the types of patient rooms set by the user and the number of patient rooms of each type, along with the cost information read out by the process in step 100, to derive the implementation cost as a sum for all patient rooms and ventilation equipment.

[0087] In step 124, the CPU 11 controls the display unit 15 to display a priority setting screen with a predetermined configuration, and in step 126, the CPU 11 waits until predetermined information is entered.

[0088] Figure 10 shows an example of the priority setting screen according to this embodiment. As shown in Figure 10, the priority setting screen according to this embodiment displays a message prompting the user to set the option with the higher priority for the evaluation target. In addition, this priority setting screen displays a designation section 15F for specifying the option with the higher priority among the implementation cost and infection risk.

[0089] As an example, when the priority setting screen shown in Figure 10 is displayed on the display unit 15, the user, via the input unit 14, selects the designation unit 15F corresponding to the higher priority of either the installation cost or the infection risk, and then presses the confirm button 15K. Accordingly, step 126 becomes a positive judgment, and the process proceeds to step 128. Note that the example shown in Figure 10 illustrates the case where the installation cost has a higher priority than the infection risk.

[0090] In step 128, the CPU 11 creates information for displaying a predetermined evaluation support information presentation screen, which displays information including various infection risk values ​​and implementation costs derived in the processing of step 122, arranged according to the priority set by the user. In step 130, the CPU 11 controls the display unit 15 to display the evaluation support information presentation screen using the created information. Then, in step 132, the CPU 11 waits until predetermined information is input.

[0091] Figure 11 shows an example of the evaluation support information display screen 15G according to this embodiment. As shown in Figure 11, the evaluation support information display screen 15G according to this embodiment displays the introduction cost, the number of rooms for each type of room, the maximum number of patients, and the required number of medical personnel for each case under consideration. In addition, the evaluation support information display screen 15G displays the infection risk value P per medical personnel per set period (80 days in the example shown in Figure 11) for each case under consideration. hc , and the infection risk value P for the entire hospital all This information is displayed. In this case, the information is displayed in ascending or descending order for the items that the user has set as having high priority. In the example shown in Figure 11, cases under consideration with the same number of hospital rooms of each type are grouped together, and each group is shown in descending order of implementation cost.

[0092] For example, when the evaluation support information display screen 15G shown in Figure 11 is displayed on the display unit 15, the user can select the detailed information display button 15J via the input unit 14 if they wish to display a detailed information display screen that shows more detailed information. Alternatively, the user can select the OK button 15K if they wish to exit the display of the evaluation support information display screen 15G. If the user selects either the detailed information display button 15J or the OK button 15K, step 132 becomes a positive determination, and the system proceeds to step 134.

[0093] In step 134, the CPU 11 determines whether or not to display the detailed information display screen by determining whether or not the detailed information display button 15J was selected. If the determination is negative, this infection risk assessment support process is terminated. On the other hand, if the determination in step 134 is positive, the process proceeds to step 136.

[0094] In step 136, the CPU 11 controls the display unit 15 to display a detailed information display screen with a predetermined configuration. Then, in step 138, the CPU 11 waits until predetermined information is input.

[0095] Figure 12 shows an example of the detailed information display screen 15H according to this embodiment. As shown in Figure 12, the detailed information display screen 15H according to this embodiment displays information regarding the cost per room, room area, room height, ventilation equipment, ventilation rate by outside air and circulation, and filters for each case under consideration and for each type of patient room.

[0096] For example, when the detailed information display screen 15H shown in Figure 12 is displayed on the display unit 15, the user presses the OK button 15K if they wish to end the display of the detailed information display screen. When the user presses the OK button 15K, step 138 becomes a positive determination, and this infection risk assessment support process ends.

[0097] Incidentally, there are two main methods for dealing with contaminated air: firstly, dilution through ventilation with outside air, and secondly, filtration by filters or sterilization by ultraviolet light during circulation by air conditioning. Of these, the first method dilutes the CO2 concentration at the same time, while the second method does not dilute the CO2 concentration, but only removes or sterilizes the pollutants. For this reason, in indoor environments where the number of ventilation cycles by circulation is greater than the number of ventilation cycles with outside air, it is inappropriate to assess the risk of airborne infection based on CO2 concentration.

[0098] The method according to this embodiment can probabilistically evaluate the risk from contaminated air, taking into account the number of ventilation cycles due to circulation, and evaluates the risk of airborne infection including factors that are not considered in many conventional technologies.

[0099] Figure 13 shows a graph comparing the evaluation results of the method according to this embodiment, which takes into account the number of ventilation cycles, with those of a conventional method that does not take into account the number of ventilation cycles. In this conventional method, the effects of virus removal such as ventilation by circulation and sterilization cannot be taken into account, and even if the number of ventilation cycles is increased, the evaluation results of infection risk cannot be appropriately assessed.

[0100] On the other hand, the evaluation results obtained using the method according to this embodiment allow us to assess that the risk of infection has decreased due to the effect of increasing the ventilation rate through circulation, thus enabling a more appropriate and theoretical evaluation of the risk of airborne infection.

[0101] As described above, according to this embodiment, design condition-related information regarding the design conditions of the building to be evaluated (target building), infection-related information regarding the infectious disease to be evaluated (target infectious disease), equipment cost-related information regarding the cost of the equipment to be applied for ventilation in the building (target equipment), and air volume-related information regarding the amount of air ventilated by the equipment are acquired. Using the acquired information, infection risk information (infection risk value in this embodiment) indicating the risk of infection by the infectious disease inside the building, and introduction cost information (introduction cost itself in this embodiment) indicating the cost required to introduce the equipment, are derived for each case where multiple different conditions are applied to the number of equipment to be applied, the amount of air ventilated, and at least one of the design conditions of the building, and the derived infection risk information and introduction cost information are presented. Therefore, it is possible to support the evaluation of infection risk against infectious diseases even at the stage before the construction of a medical facility.

[0102] Furthermore, according to this embodiment, the design condition-related information includes at least one of the volume of the room (hospital room) provided in the building, the number of beds available for use by infected persons in the room, and the number of medical personnel entering the room; the infectious disease-related information includes the quanta generation rate; the equipment cost-related information includes at least one of the price of the equipment, the installation cost of the equipment, and the running cost of the equipment; and the air volume-related information includes at least one of the number of ventilations per unit time by outside air and the number of ventilations per unit time by circulation. Therefore, infection risk information and introduction cost information can be derived using the included information.

[0103] Furthermore, according to this embodiment, priority information indicating which information—infection risk information or implementation cost information—should be prioritized is acquired, and the infection risk information and implementation cost information are presented in ascending order based on the information indicated by the acquired priority information. Therefore, convenience for the user can be further improved.

[0104] In the above embodiment, we have described a case where the evaluation support information display screen is displayed in ascending order of implementation costs, but the system is not limited to this. For example, the evaluation support information display screen may be displayed in descending order of implementation costs, or in ascending order of infection risk values, or in descending order of infection risk values.

[0105] Furthermore, although the above embodiment described a case in which ventilation equipment with an air purification function is used as the equipment, it is not limited to this. For example, instead of the ventilation equipment, ventilation equipment without an air purification function may be used as the equipment, or air purification equipment without a ventilation function may be used as the equipment.

[0106] Furthermore, although the above embodiment described a case where the volume is common for each type of patient room, the invention is not limited to this. For example, the volume may be different for each type of patient room.

[0107] Furthermore, although the above embodiment described a case where the installation cost is included in the introduction cost, it is not limited to this. For example, the introduction cost may not include the installation cost, but only the equipment cost.

[0108] Furthermore, it goes without saying that the configuration of the cost information database 13B applied in the above embodiment is merely an example and is not limited to what is illustrated.

[0109] Furthermore, in the above embodiment, for example, the hardware structure of the processing unit that executes the acquisition unit 11A, the derivation unit 11B, and the presentation unit 11C can be any of the following types of processors. As mentioned above, these types of processors include a CPU, which is a general-purpose processor that executes software (programs) and functions as a processing unit, as well as programmable logic devices (PLDs), such as FPGAs (Field-Programmable Gate Arrays), which are processors whose circuit configuration can be changed after manufacturing, and dedicated electrical circuits, such as ASICs (Application Specific Integrated Circuits), which are processors with circuit configurations specifically designed to execute specific processes.

[0110] The processing unit may consist of one of these various processors, or it may consist of a combination of two or more processors of the same or different types (for example, a combination of multiple FPGAs, or a combination of a CPU and an FPGA). Alternatively, the processing unit may consist of a single processor.

[0111] Examples of configuring a processing unit with a single processor include, firstly, a configuration where one or more CPUs and software combine to form a single processor, as is common in client and server computers, and this processor functions as the processing unit. Secondly, a configuration using a processor that realizes the functions of the entire system, including the processing unit, on a single IC (Integrated Circuit) chip, as is common in System-on-a-Chip (SoC) systems. Thus, the processing unit is configured, in terms of hardware structure, using one or more of the above-mentioned types of processors.

[0112] Furthermore, the hardware structure of these various processors can more specifically utilize electrical circuits, which are combinations of circuit elements such as semiconductor devices. [Explanation of symbols]

[0113] 10. Infection risk assessment support device 11 CPU 11A Acquisition Department 11B Derivation part 11C Presentation section 12 memory 13 Storage section 13A Infection Risk Assessment Support Program 13B Cost Information Database 14 Input section 15 Display 15A1 Designated part 15A2 Patient Room Setting Slot 15B1 Input box 15B2 Input box 15C1 Selection Slot 15C2 Input Frame 15D Input Frame 15E1 Selection Slot 15E2 Input Frame 15F designated section 15G Evaluation Support Information Display Screen 15H Detailed information presentation screen 15J Detailed Information Display Button 15K Confirm button 16. Media reading / writing device 17 Recording media 18 Communication I / F Section

Claims

1. An acquisition unit that acquires design condition-related information regarding the design conditions of the building to be evaluated, infection-related information regarding the infectious disease to be evaluated, equipment cost-related information regarding the cost of equipment applied to perform at least one of ventilation and air purification in the building, and air volume-related information regarding the amount of air that is ventilated and air purified by the equipment, A derivation unit that uses the information acquired by the acquisition unit to derive infection risk information indicating the risk of infection by the infectious disease inside the building, and introduction cost information indicating the cost required to introduce the equipment, for each case in which multiple different conditions are applied to the number of applications of the equipment, the amount of air in which at least one of the ventilation and air purification is performed, and at least one of the design conditions of the building. A presentation unit presents the infection risk information and the introduction cost information derived by the derivation unit, Equipped with, The aforementioned air volume-related information includes the number of units of the equipment required per bed room in the building. Infection risk assessment support device.

2. The aforementioned design condition-related information includes at least one of the volume of a room provided in the building, the number of hospital beds available for use by infected persons in the room, and the number of medical personnel entering the room. The aforementioned infectious disease-related information includes the quanta generation rate, The aforementioned equipment cost-related information includes at least one of the price of the equipment, the installation cost of the equipment, and the running cost of the equipment. The aforementioned air volume-related information includes at least one of the number of ventilations per unit time due to outside air and the number of ventilations per unit time due to circulation. The infection risk assessment support device according to claim 1.

3. The acquisition unit further acquires priority information indicating which of the infection risk information and the introduction cost information should be prioritized. The display unit presents the information indicated by the priority information acquired by the acquisition unit, sorted in ascending or descending order, and includes the infection risk information and the introduction cost information. The infection risk assessment support device according to claim 1 or claim 2.

4. The following information is obtained: design condition-related information regarding the design conditions of the building to be evaluated, infection-related information regarding the infectious disease to be evaluated, equipment cost-related information regarding the cost of equipment applied to perform at least one of ventilation and air purification in the said building, and air volume-related information regarding the amount of air that is ventilated and purified by the said equipment. Using the acquired information, infection risk information indicating the risk of infection by the infectious disease inside the building, and installation cost information indicating the cost required to install the equipment, are derived for each case where multiple different conditions are applied to the number of applications of the equipment, the amount of air in which at least one of the ventilation and air purification is performed, and at least one of the building's design conditions. This process presents the derived infection risk information and the introduction cost information. The aforementioned air volume-related information includes the number of units of the equipment required per bed room in the building. A program that assists in assessing infection risk to enable computers to perform processing.

Images