CONTROLLER FOR A MEDICAL PRODUCTS STORAGE SYSTEM
A medical product storage device includes a controller that operates an access control system to limit access to a storage space of the medical product storage device. The controller monitors a temperature in the storage space and other operating parameters of the medical product storage device. The medical product storage device includes a display that displays information related to the operating parameters. The information related to the operating parameters includes a graph of the temperature in the storage space, the graph including icons associated with specific events that occur relative to the operating parameters. Activation of the icons cause an event history to be displayed. Activation of a specific event permits a user to generate a corrective action record. A user remote from the medical product storage device may be notified of specific adverse events.
The present invention relates generally to a controller for a medical products storage system. More specifically, the present invention relates to a controller for a medical products storage system that includes automated notification of fault conditions and an enhanced user interface.
Medical products including medications, tissues, and blood products are in limited supply and have a limited shelf life. Storage of medical products requires stringent controls to confirm that the products are of sufficient quality and that they have been maintained in a manner to confirm their safety for use. Controls must be in place along all steps of the collection, manufacturing, distribution, and administration of the medical products. The medical products move between storage locations at each step along the process, with each move a storage location providing opportunities for incorrect storage of the products. The products are usually stored in refrigerated cabinetry that operates to preserve the quality of the product stored by controlling the temperature within the compartments very carefully.
Because of the high value of products stored in the medical product storage devices, malfunctions of the devices or improper operating conditions should be communicated to appropriate personnel as soon as possible to provide for remediation of any out-of-control conditions. In addition, records are kept to confirm that the operating characteristics of the storage devices have been within acceptable control limits, thereby confirming the proper storage of the medical products stored therein.
SUMMARYThe present application discloses one or more of the features recited in the appended claims and/or the following features which alone or in any combination, may comprise patentable subject matter.
A medical product storage device comprises a storage space, a refrigeration unit, a controller, a user interface, and a temperature sensor. The refrigeration unit is operable to cool the storage space. The controller is electrically coupled to the refrigeration unit. The controller includes a processor and a memory device electrically coupled to the processor. The user interface includes a display and a user input device. The user interface is electrically coupled to the controller. The temperature sensor is electrically coupled to the controller. The temperature sensor communicates a temperature signal to the controller. The temperature signal is indicative of the temperature in the storage space. The controller is operable to generate an electronic record if the medical product storage device experiences an event that meets predetermined criteria for documentation. The controller is operable to allow a user to enter information related to the event, the user entered information being added to the record.
In some embodiments, the information related to the event is unalterable after the information has been written to the record.
In some embodiments, the event that meets predetermined criteria is a temperature in the storage space that is outside of an acceptable limit.
In some embodiments, the controller is operable to generate an alarm when the event occurs.
In some embodiments, the controller is operable to provide a notification to a user spaced apart from the medical product storage device.
In some embodiments, the notification to the user is a message provided over a network connection between the controller and an external network.
In some embodiments, the notification to the user is a message transmitted to the user through a wireless signal that communicates to a communication device associated with the user.
In some embodiments, the user to whom the notification is communicated is selected from a list of potential contacts, the user selected according to predetermined criteria.
In some embodiments, the predetermined criteria include the nature of the event about which the user is to be notified.
In some embodiments, the controller reads the temperature signal and communicates the temperature signal to the user interface. In some embodiments, the user interface generates an image on the display that graphically displays the temperature as a function of time.
In some embodiments, when the controller communicates the event to the user interface, the user interface graphically displays an icon representative of the event on the image with the location of the icon corresponding to the time of the event.
In some embodiments, the user interface is operable to allow a user to operate the user input to activate the icon representative of the event to thereby display a record associated with the specific event.
In some embodiments, the record of the event appears as an entry in a log of events and activation of any part of the record in the log causes the user interface to generate an image on the display that includes additional details of the record.
In some embodiments, the additional details of the record include an action taken to resolve the event.
In some embodiments, the refrigerator further comprises an electrically actuated access control device electrically coupled to the controller, the electrically actuated access control device operable to prevent access to the storage space under the control of the controller.
In some embodiments, the user interface is operable to receive a password from a user permitting access to the storage space.
In some embodiments, when a user accesses the storage space, a record is generated that includes information related to the user's access to the storage space. The information may include the the time and duration of the access.
In some embodiments, the controller communicates the record wirelessly to an external device associated with a particular user.
In some embodiments, the memory device includes instructions that, when executed by the processor, cause the processor to signal the user interface to display a first image on the display that indicates a graphical history of the temperature sensed by the temperature sensor.
In some embodiments, the memory device includes instructions that, when executed by the processor, cause the processor to respond to the receipt of information that predetermined criteria for documentation of an event has been met to signal the user interface to display an icon indicative of the event that meets predetermined criteria for documentation on the image displayed.
In some embodiments, the memory device includes instructions that, when executed by the processor, cause the processor to identify a user to be notified of the event, the user being identified based on criteria related to the event.
In some embodiments, the memory device includes instructions that, when executed by the processor, cause the processor to generate a signal that is transmitted from the medical product storage device to a location that is remote from the medical product storage device to signal the event to the user.
In some embodiments, the memory device includes instructions that, when executed by the processor, cause the processor to respond to a user input activating the icon by signaling the user interface to display a second image on the display that shows a list of events that have occurred over a period of time.
In some embodiments, the memory device includes instructions that, when executed by the processor, cause the processor to respond to a user input activating one of the data items in the list of events by signaling the user interface to display a third image on the display that shows details regarding a specific event.
In some embodiments, the memory device includes instructions that, when executed by the processor, cause the processor to respond to the user activating a first portion of the third image by permitting the user to input a cause associated with the specific event.
In some embodiments, the memory device includes instructions that, when executed by the processor, cause the processor to respond to the user activating a second portion of the third image by permitting a user to input a corrective action associated with the specific event.
In some embodiments, the memory device includes instructions that, when executed by the processor, cause the processor to respond to the user activating a third portion of the third image by permitting a user to enter to input a code associated with the user.
In some embodiments, the memory device includes instructions that, when executed by the processor, cause the processor to respond to the user activating a fourth portion of the third image by permitting the user to save the input information to a record.
Additional features and advantages of the invention will become apparent to those skilled in the art upon consideration of the following detailed description of illustrated embodiments exemplifying the best mode of carrying out the invention as presently perceived.
The detailed description of the drawings particularly refers to the accompanying figures in which:
A medical products storage device, illustratively embodied as a medical product storage device that operates at temperatures below freezing, is shown diagrammatically in
AC power is fed to a power supply assembly 14 that includes a DC power supply 16 that converts the AC power to 12 V DC power. The freezer 10 also includes a control assembly 18 that receives DC power from the DC power supply 16. The control assembly 18 includes a processor 20 and a memory device 22 which cooperate to provide the logic control for the freezer 10. The control assembly 18 is connected to a user interface control 24 to provide a power connection 26 and a communications connection 28. Communication between the control assembly 18 and the user interface control 24 over the communications connection 28 is via a USB protocol. The control assembly 18 also includes an RS-232 interface 30 that may be connected to other peripheral devices as will be understood by those of ordinary skill in the art. The control assembly 18 also communicates with an exterior alarm 32 through a connection 34 so that alarm conditions detected by the control assembly 18 may be communicated externally through the exterior alarm 32.
A condensing unit 36 includes a compressor 38 and a condensing fan 40. Operation of the condensing unit 36 is controlled by the control assembly 18 that operates a condenser relay 42 turn the condensing unit 36 on and off. The condenser relay receives power from the mains power source 12 with the condenser relay 42 being turned on and off by the control assembly 18. The control assembly 18 includes a relay 44 that operates a unit cooler 46 that includes fans 48 to circulate the cool air within the cabinet 21 of the freezer 10. Medical products are stored in a storage space defined by the cabinet 21. The control assembly 18 also includes a door heating elements relay 50 that operates a set of doors heating elements 52 as necessary to control the operation of the freezer 10. The door heating elements relay 50 receives power from the mains power source 12 and powers the doors heating elements 52 under the control of the control assembly 18. Similarly, a condenser evaporator 54 is operated by a relay 56 of the control assembly 18 through a connection 55. A light assembly 58 includes a power supply 60 that receives AC power from the mains power source 12 and converts it to 12 V DC power with the total power being controlled by the control assembly 18 through a relay 62. The condenser evaporator 54 and the door heating elements 52 are used to defrost the freezer 10.
The freezer 10 also includes a door lock 66 that includes a solenoid 68 that receives DC power from the power supply assembly 14 and is controlled by the control assembly 18 to lock and unlock the doors of the freezer 10 to control access to the cabinet 21 to authorized individuals. It is contemplated that a more complex access control structure may be implemented that includes a multi-level access control approach such as the approach employed in U.S. Patent Application Publication 2011-0202170-A1, titled “ACCESS AND INVENTORY CONTROL FOR CLIMATE CONTROLLED STORAGE,” which hereby incorporated by reference herein. The status of the doors (not shown) are monitored by door switches 70 which sense when the door or doors of the freezer 10 are closed and provide that signal as an input to the control assembly 18. The control assembly 18 also receives inputs from a number of probes that monitor a number of operating characteristics of the freezer 10. An upper chamber temperature probe 72 monitors the temperature inside the cabinet of the freezer 10. A water bottle probe 74 monitors the volume of water in a water bottle 76. The water bottle 76 is used as a temperature stabilizer in the cabinet of the freezer 10. A lower chamber temperature probe 78 monitors the temperature in the lower portion of the cabinet 21 of the freezer 10. A condenser discharge probe 80 monitors the presence of fluid in the condenser discharge (not shown).
The freezer 10 also includes a chart recorder 82 that receives power through the control assembly 18 from the power supply assembly 14. The chart recorder 82 is also connected to a battery 84 that provides backup power to the chart recorder 82 in the event of a power loss from the mains power source 12. The chart recorder 82 is connected to an independent temperature probe 86 which provides a signal indicative of the temperature in the cabinet of the freezer 10 to the chart recorder 82 which then mechanically marks the measured temperature on a paper graph provide a record of the temperature inside freezer 10 as a back-up to the electrically monitored signal.
The user interface control 24 includes a test port connection 88 that allows a user to connect an external device such as a laptop, for example, to the freezer 10 to access the control system 100 of the freezer 10 for maintenance. In addition, the user interface control is connected to a speaker 90 so that audible alarms can be generated through the speaker 90 by the user interface control 24. The user interface control 24 also includes a universal serial bus (USB) port 92 that is externally accessible by a user to connect to the user interface control 24 and, thereby the control assembly 18 through the communications connection 28 between the user interface control 24 and control assembly 18. The USB connection may also be used to connect the freezer 10 to an external network accessible remotely from the freezer 10. For example, the USB connection may be used to connect to control system 100 to a network of medical products storage devices that are monitored at a central location. For example, medical products storage devices may be distributed throughout a hospital and in communication with a central monitoring station in the hospital pharmacy or materials control departments. While the illustrative port 92 utilizes a USB communications protocol, it should be understood that any of a number of communications protocols could be adapted to the freezer 10 to allow the control system 100 to communicate with a network. For example, the control system 100 may include an Ethernet connection that allows the control system 100 to connect to a network. The user interface control includes a processor 94 and memory 96 which allow the user interface control to communicate with the control assembly 18 and to operate a touchscreen display 98 that is illustratively embodied as an LCD touchscreen device. The user interface control 24 is in communication with the touchscreen display 98 through a peripheral connection 102 and provides backlighting power to the touchscreen display 98 through a power connection 104.
Those of ordinary skill in the art will readily recognize the flexibility afforded by a user interface that includes a touchscreen display such as the touchscreen display 98. Other methods of activating icons on a display are known by those of skill in the art to include mouse, rollerball, joysticks or the like in conjunction with the separate input devices such as keyboards or buttons and the like. The present disclosure should not be considered to be limited to the use of touchscreens exclusively. Various images displayed on the display screen of the freezer 10 will be discussed in more detail below. In normal operation, a home screen image similar to the screen shown in
Activation of an applications icon 118 causes the display to generate an image of an applications screen similar to that shown in
Activation of icon 140 allows a user to transfer to a temperature calibration screen that is discussed in further detail below with regard to
Activation of the icon 144 activates the date and time screen that will be discussed in further detail below with regard to
Referring now to
Referring now to
Other alarm conditions such as power failure, probe failure, or a door open condition each are identified as an alarm event that is logged. However, each alarm event includes an adjustable time delay before the alarm event is actually signaled as an alarm condition to a user. The spin box 188 is used to set the time delay for the power failure condition; the spin box 190 is used to adjust the delay for a probe failure. The door-opened time may be adjusted using a spin box 192 that defines the period of time a door is allowed to be opened before alarm condition is signal to a user. In addition, the compressor temperature set point may be adjusted using a spin box 194 with a spin box 196 being used to define the time delay for the alarm condition for the compressor temperature set point. In some embodiments, the system may measure the number of times a door is opened and assign alarm conditions to that value. In some embodiments, an agitator may be positioned in the cabinet of the freezer 10 and the motion of the agitator may be monitored. A structure which utilizes an agitator is disclosed in U.S. Pat. No. 7,638,100, which is incorporated by reference herein. When the agitator motion stops unexpectedly, an alarm may be generated and the alarm condition signal may be time delayed as explained with regard to the other alarms discussed above. In still yet other embodiments, the pressure sensor may be used to monitor refrigerant pressure and when the refrigerant pressure drops below an acceptable level, the alarm condition signal may be generated. The refrigerant pressure alarm may also include a time delay that must be met before the alarm condition will be communicated to a user.
When the temperature calibration icon 140 shown in
When the time and date icon 144 shown in
When the icon 164 shown in
A spin box 246 is used to adjust the fan-operating mode between one of three modes. In mode one, the fan runs if the compressor output is on. In mode one, after a defrost cycle, the fan output is off until the fan delay time is met. The fan delay time is adjusted by spin box 250. In mode two, the fan runs continuously except during defrost and for the period of the fan delay after defrost adjusted by spin box 250. In mode three, the fan runs as the compressor output is on and it runs during defrost. A spin box 248 is used to adjust a fan stop temperature that is the temperature below which the fan will not run.
Referring now to
Referring now to
Referring now to
The display 98 may also be used to provide a visual display of key information related to the operation of the freezer 10. The screen shown in
Activation of either icon 302 or 304 will cause the display 98 to display an event log screen similar to that shown in
The event log detail screen includes additional information relating to the operation of the freezer 10 at the time of the event. In addition, a user is able to acknowledge the event and identify corrective actions taken related to the event. Specifically, the user may select a drop-down menu 322 to identify the cause of the alarm. Multiple alarm causes are listed in the drop-down menu or a user may select “Other” to activate a QWERTY keyboard to enter a cause of the alarm. A drop-down menu 344 is used to select an action taken to respond to the alarm with several corrective actions listed in the drop-down menu. A user may select “Other” under the action taken to activate a QWERTY keyboard to enter a specific corrective action not otherwise listed in the drop-down menu. By selecting an icon 326, a user activates a QWERTY keyboard display that allows the user to provide an input for their name or initials. Activation of an icon 328 allows the user to save the corrective action. Once a corrective action has been saved, it cannot be edited so that a corrective action cannot be modified later.
Activation of the icon 314 in
The access control setup screen is accessed by activating an icon 342 shown in
The control system 100 also includes the capability of downloading logged data with one, two, three, or four months of data available for downloading. Information included in any of the logs may be downloaded to memory device attached to USB port 92. In the illustrative embodiment, the data is downloaded as a .CSV file type. In addition, information may be uploaded to update the software of the control system 100 by inserting a memory device in the USB port 92 and activating and upload icon (not shown). Software uploaded could include new options for the control system 100 or software updates.
The control assembly 18 also includes a transceiver 19 illustratively embodied as a radio transceiver which is operable to broadcast event information to an extra receiver to notify a user who is not a proximate the freezer 10 of any alarm conditions experienced by the freezer 10. The transmitter 19 of the illustrative embodiment sends a cellular text message to a user or user group depending on parameters defined in the control system 100. For example, all alarms may be sent to a single individual. Alarms may be configured to be transmitted to the user logged in to the access control system. Event information may also be configured to be sent to specific individuals based on the type of the event or alarm so that the appropriate personnel can respond. In some embodiments, the transceiver 19 may detect the presence of a radio frequency identification (RFID) emitter in proximity to the freezer 10 and provide access to the control system 100 based on information associated with the RFID emitter which is associated with a particular user. In such embodiments, the user may forgo entering password information and the control system 100 may provide access to only authorized screens associated with the user.
It should also be understood that the control system 100 may be a client on a network and connected to the network through either the USB port 92 or test port 88. When connected to a network, event information may be communicated over the network to be stored remotely from the freezer 10 as well as being stored redundantly on the freezer 10.
Although the invention has been described with reference to the preferred embodiments, variations and modifications exist within the scope and spirit of the invention as described and defined in the following claims.
Claims
1. A medical product storage device comprising
- a storage space,
- a refrigeration unit operable to cool the storage space,
- a controller electrically coupled to the refrigeration unit, the controller including a processor and a memory device electrically coupled to the processor,
- a user interface including a display and a user input device, the user interface electrically coupled to the controller,
- a temperature sensor electrically coupled to the controller, the temperature sensor communicating a temperature signal to the controller, the temperature signal indicative of the temperature in the storage space, and
- wherein the controller is operable to generate an electronic record if the medical product storage device experiences an event that meets predetermined criteria for documentation and the controller is operable to allow a user to enter information related to the event, the user entered information being added to the record.
2. The medical product storage device of claim 1, wherein the information related to the event is unalterable after the information has been written to the record.
3. The medical product storage device of claim 1, wherein the event that meets predetermined criteria is a temperature in the storage space that is outside of an acceptable limit.
4. The medical product storage device of claim 1, wherein the controller is operable to generate an alarm when the event occurs.
5. The medical product storage device of claim 4, wherein the controller is operable to provide a notification to a user spaced apart from the medical product storage device.
6. The medical product storage device of claim 5, wherein the notification to the user is a message provided over a network connection between the controller and an external network.
7. The medical product storage device of claim 5, wherein the notification to the user is a message transmitted to the user through a wireless signal that communicates to a communication device associated with the user.
8. The medical product storage device of claim 7, wherein the user to whom the notification is communicated is selected from a list of potential contacts, the user selected according to predetermined criteria.
9. The medical product storage device of claim 8, wherein the predetermined criteria includes the nature of the event about which the user is to be notified.
10. The medical product storage device of claim 9, wherein the controller reads the temperature signal, communicates the temperature signal to the user interface, and wherein the user interface generates an image on the display that graphically displays the temperature as a function of time.
11. The medical product storage device of claim 10, wherein the controller communicates the event to the user interface and the user interface graphically displays an icon representative of the event on the image, the location of the icon corresponding to the time of the event.
12. The medical product storage device of claim 11, wherein the user interface is operable to allow a user to operate the user input to activate the icon representative of the event to thereby display the record associated with the specific event.
13. The medical product storage device of claim 12, wherein the record of the event appears as an entry in a log of events and wherein activation of any part of the record in the log causes the user interface to generate an image on the display that includes additional details of the record.
14. The medical product storage device of claim 13, wherein the additional details of the record include an action taken to resolve the event.
15. The medical product storage device of claim 1, further comprising an electrically actuated access control device electrically coupled to the controller, the electrically actuated access control device operable to prevent access to the storage space under the control of the controller.
16. The medical product storage device of claim 15, wherein the user interface is operable to receive a password from a user permitting access to the storage space.
17. The medical product storage device of claim 16, wherein when a user accesses the storage space, a record is generated that includes information related to user's access to the storage space including the time and duration of the access.
18. The medical product storage device of claim 17, wherein the controller communicates the record wirelessly to an external device associated with a particular user.
19. The medical product storage device of claim 15, wherein the electrically actuated access control device includes a solenoid actuated lock.
20. The medical product storage device of claim 1, wherein the memory device includes instructions that, when executed by the processor, cause the processor to
- signal the user interface to display a first image on the display that indicates a graphical history of the temperature sensed by the temperature sensor,
- in response to the receipt of information that predetermined criteria for documentation has been met, signal the user interface to display an icon indicative of an event that meets predetermined criteria for documentation on the image displayed,
- identify a user to be notified of the event, the user being identified based on criteria related to the event,
- generate a signal that is transmitted from the medical product storage device to a location that is remote from the medical product storage device to signal the event to the user,
- respond to a user input activating the icon by signaling the user interface to display a second image on the display that shows a list of event that have occurred over a history,
- respond to a user input activating one of the data items in the list of events by signaling the user interface to display a third image on the display that shows details regarding a specific event,
- respond to the user activating a first portion of the third image by permitting the user to input a cause associated with the specific event,
- respond to the user activating a second portion of the third image by permitting a user to input a corrective action associated with the specific event,
- respond to the user activating a third portion of the third image by permitting a user to enter to input a code associated with the user, and
- respond to the user activating a fourth portion of the third image by permitting the user to save the input information to a record.
Type: Application
Filed: Oct 7, 2011
Publication Date: Apr 11, 2013
Inventors: Colleen M. Holtkamp (Noblesville, IN), Donna L. Holpuch (Noblesville, IN), Jonathan A. Dorris (Noblesville, IN), Aaron G. Stout (Carmel, IN), Dennis K. Dawes (Indianapolis, IN)
Application Number: 13/268,148