US20100300130A1 - Medical Storage Case with Remote Unlocking Refrigerator with thermal Spoilage Protection - Google Patents

Medical Storage Case with Remote Unlocking Refrigerator with thermal Spoilage Protection Download PDF

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Publication number
US20100300130A1
US20100300130A1 US12854486 US85448610A US2010300130A1 US 20100300130 A1 US20100300130 A1 US 20100300130A1 US 12854486 US12854486 US 12854486 US 85448610 A US85448610 A US 85448610A US 2010300130 A1 US2010300130 A1 US 2010300130A1
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Prior art keywords
refrigerator
cabinet
power
temperature
ac power
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Abandoned
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US12854486
Inventor
Norman A. Shoenfeld
Fred H. Sopenoff
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S&S X-RAY PRODUCTS Inc
S&S X Ray Products Inc
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S&S X Ray Products Inc
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    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07FCOIN-FREED OR LIKE APPARATUS
    • G07F17/00Coin-freed apparatus for hiring articles; Coin-freed facilities or services
    • G07F17/0092Coin-freed apparatus for hiring articles; Coin-freed facilities or services for assembling and dispensing of pharmaceutical articles
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B50/00Containers, covers, furniture or holders specially adapted for surgical or diagnostic appliances or instruments, e.g. sterile covers
    • A61B50/10Furniture specially adapted for surgical or diagnostic appliances or instruments
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00Operating or controlling locks or other fastening devices by electric or magnetic means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHER SUBCLASS
    • F25D29/00Arrangement or mounting of control or safety devices
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F19/00Digital computing or data processing equipment or methods, specially adapted for specific applications
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07CTIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00Individual entry or exit registers
    • G07C9/00174Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00896Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/35Communication
    • A61M2205/3546Range
    • A61M2205/3561Range local, e.g. within room or hospital
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/35Communication
    • A61M2205/3576Communication with non implanted data transmission devices, e.g. using external transmitter or receiver
    • A61M2205/3592Communication with non implanted data transmission devices, e.g. using external transmitter or receiver using telemetric means, e.g. radio or optical transmission
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/36General characteristics of the apparatus related to heating or cooling
    • A61M2205/3606General characteristics of the apparatus related to heating or cooling cooled
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/60General characteristics of the apparatus with identification means
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/44Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for cooling or heating the devices or media
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B2047/0084Key or electric means; Emergency release
    • E05B2047/0086Emergency release, e.g. key or electromagnet
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B2047/0094Mechanical aspects of remotely controlled locks
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B65/00Locks or fastenings for special use
    • E05B65/0042For refrigerators or cold rooms
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHER SUBCLASS
    • F25D2700/00Means for sensing or measuring; Sensors therefor
    • F25D2700/02Sensors detecting door opening
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHER SUBCLASS
    • F25D2700/00Means for sensing or measuring; Sensors therefor
    • F25D2700/12Sensors measuring the inside temperature
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07CTIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C2209/00Indexing scheme relating to groups G07C9/00 - G07C9/02
    • G07C2209/60Indexing scheme relating to groups G07C9/00174 - G07C9/00944
    • G07C2209/62Comprising means for indicating the status of the lock
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07CTIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00Individual entry or exit registers
    • G07C9/00174Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00896Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses
    • G07C9/00912Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses for safes, strong-rooms, vaults or the like

Abstract

A controlled access pharmaceutical storage case has storage spaces arranged vertically one above the other and a pharmaceutical refrigerator located at its base. A remotely actuable refrigerator door lock on the refrigerator door has a data port connecting with a programmed electronic control arrangement, e.g., a computer or network. The refrigerator has a compressor at the top of the case that operates on line AC or on battery DC backup power. A battery backup arrangement is located at the top of the case. When AC is detected to be absent or insufficient, i.e., during general or localized power failure, the refrigerator operates on battery, and the door lock is prevented from unlocking. Internal temperature and humidity levels are tracked and sent at intervals to a predetermined destination for action.

Description

  • This is a Continuation-in-part of co-pending U.S. patent application Ser. No. 12/470,541, filed May 22, 2009, which is a Continuation-in-part of U.S. patent application Ser. No. 11/391,986, filed Mar. 29, 2006, now abandoned. Applicant also claims priority of co-pending applications Ser. No. 11/653,726, Jan. 16, 2007, now U.S. Pat. No. 7,728,711, and Ser. No. 11/800,937, May 8, 2007, pending. The contents thereof are incorporated by reference herein.
  • BACKGROUND OF THE INVENTION
  • This invention relates to an electronically accessible locked storage cabinet for storing consumable items for patient care, such as pharmaceuticals. The invention is more particularly concerned with a storage cabinet or case that incorporates a pharmaceutical refrigerator for storing certain sensitive drugs that are considered perishable and need to be kept refrigerated and not exposed to temperatures outside an optimal temperature range. The invention is also directed to a cabinet with an incorporated refrigerator that connects to a remote computer system, e.g., in a hospital or health care facility, to secure pharmaceuticals that need to be refrigerated, and which has a provision for maintaining the pharmaceuticals under refrigeration in the event of a power failure. The system may also adapted for keeping an audit trail of access to the refrigerator.
  • In general, pharmaceuticals and other patient care supplies such as bandages, injectable IV solutions, and the like, are delivered to patients when needed, and those that need to be kept refrigerated are stored in a refrigerator in the pharmacy of the hospital or other facility. However, those drugs that need refrigeration cannot simply be stored in a conventional secured room-temperature dispensing cabinet, but have to be kept in a refrigerator until needed. Any record of access to the refrigerator would have to be maintained on a paper record, or by separately keying in information on separate computer work station. There is also no means provided to ensure that the refrigerator is kept locked, to alarm if the refrigerator is left open or unlocked, or to monitor the refrigerator's operating temperature or the humidity within the refrigerator cabinet.
  • An additional problem is that many pharmaceuticals, including many used for oncology, are of extreme high value, and that the value of the drugs contained in a single pharmaceutical refrigerator may exceed two-hundred and fifty thousand dollars. In that case, a power failure to the refrigerator may result in a devastating financial loss to the hospital or other health care institution. Because of holiday staffing during long weekend periods, the status of a given pharmaceutical refrigerator may be unknown, and this risk from a power failure can be quite significant.
  • There is a pressing need to protect the integrity of refrigerated medications, including vaccinations and oncology medications, and to keep “suspect” medications out of the supply chain where patient harm can result. The health care system must protect patients from risk of harm.
  • Real-time temperature monitoring, with some alarm capability, does exist. However, because the rise in temperature can occur before pharmacy personnel can take action to halt distribution or to salvage the high-value pharmaceuticals, there is still a large risk that the medications may become unsafe and not usable, and that some may be administered to patients.
  • It would be desirable to employ a refrigerator as a part of the medications cabinet, arranged in the same footprint, as floor space in the hospital is always quite limited. Then prescribed medications, both those that require refrigeration and those that do not, can be loaded by pharmacy staff and stored securely until administered. It is also desirable to track access automatically for the non-refrigerated and refrigerated cabinet, and which can be accessed by the pharmacy staff electronically (e.g., using RFID, bar code, or wireless means). It is also desirable to ensure that the refrigerated cabinet is kept secure, and that the operating temperature is sufficiently cool even in the event of power failure. However, systems that are currently available cannot carry out all these functions.
  • It is also desirable to integrate the refrigerator lock with the continuous monitoring of the internal temperature (and/or humidity) of the refrigerator, and to take steps to prevent materials from being distributed from the refrigerator if conditions indicate that the contents may potentially be compromised. The software associated with the refrigerator should be able to lock out or disable the unlock function for normal users (i.e., staff) but still permit over-ride unlock capability for a “master” user, e.g., pharmacy director.
  • OBJECTS AND SUMMARY OF THE INVENTION
  • Accordingly, it is an object of the present invention to provide a pharmaceutical cabinet with storage compartments or drawers for non-refrigerated drugs and other items, to provide refrigerated storage for temperature sensitive materials.
  • It is an important object to protect patients from harm by keeping suspect refrigerated medications out of the supply chain.
  • It is a further object to provide a cabinet and incorporated refrigerator with remotely actuated door lock and with a power back up that permits the refrigerator to continue to function in the event of a power failure.
  • Another object is to provide an electronic door lock mechanism with key-lock override that can be used, e.g., during a power outage, to obtain access to the medications kept in the refrigerator.
  • A further object is real-time temperature monitoring, minute-by-minute, and maintenance of a real-time log, which can be available over a computer network, as well as notification of power interruptions which may exceed some threshold, such as five minutes.
  • In accordance with an aspect of the present invention, a controlled access pharmaceutical storage case has a vertical frame having a base and a top, with a number of storage spaces, i.e. compartments and drawers, arranged vertically one above the other. At the lower end, or base, a pharmaceutical refrigerator is installed in the frame. The pharmaceutical refrigerator has a cabinet, a door that closes against the cabinet. A remotely actuable refrigerator door lock, i.e., solenoid lock, allows authorized hospital personnel to open the refrigerator door. Typically, the door lock has a data port that connects with a programmed electronic control arrangement (such as a hospital PC computer device that is incorporated into the cabinet). The refrigerator employs a refrigerant circuit. A compressor is mounted at the top of the storage case and has a pressure port or discharge port, and a suction port or return port. The compressed refrigerant gas is supplied from the pressure port to a condenser coil. Then high-pressure liquid passes through an expansion valve to an evaporator coil situated within the refrigerator cabinet. Then another conduit brings the low pressure gas from the evaporator coil back to the compressor suction port.
  • In the embodiments of this invention, the compressor is adapted to operate either with standard AC line power (i.e., 110 volts/60 Hz) or with DC battery power (i.e., 12 volts). There are standard AC power cables that can connect to a wall outlet or similar a source of standard AC line power, and there are also a battery back-up system(s) that serves the refrigerator compressor and the incorporated PC computer. The battery back-up system(s) can be situated at the top of the cabinet near the compressor. The battery back up can include a 12-volt storage battery or batteries (at suitable voltage) for providing DC battery power to the compressor (and/or to the control electronics), as well as a trickle charger or similar charging mechanism coupled to the AC power cables for supplying charging power to the storage battery arrangement. A power sensor detects whether there is AC power available, and if so then the compressor is switched to the AC power and operates on normal line power. If it detects that there is no AC power available, which would mean that a power outage is occurring, or that the unit has become unplugged from the wall outlet, then the compressor is switched over to the 12 volt storage battery, and continues to operate. The power sensor means is coupled to a data input of the PC or elsewhere in the control electronics, so that an alert can be sent to a predetermined destination. The software for this may send out the alert immediately, or may send it out if the power outage continues beyond some interval, i.e., more than five minutes. Normally, the computer or control electronics is receptive to unlock commands specific to the refrigerator door lock, so that the hospital care staff can access the patient's medications. Thus, during normal power conditions, where the AC line power is available, the authorized staff can unlatch and open the refrigerator door lock with an access code. However, during a power outage, when the refrigerator is powered only by the 12 volts storage battery, the unlock facility is disabled, and the staff are prevented from accessing the contents of the refrigerator. The refrigerator can still be opened by a supervisory person with “master” access, which may be a physical key or may be a special access code. This feature keeps the refrigerator closed during the power outage (if it exceeds more than a few minutes), to minimize the risk of temperature spoilage of the refrigerator contents, and to avoid distributing or releasing suspect medications to the patient population.
  • Favorably, the PC has its own backup or UPS system, so as not to drain off the refrigeration battery during a power failure. The PC UPS needs to be ON long enough (at a minimum) to send an email notifying the pharmacist that there is a power issue, and preferably with a tracking of temperature curve over a longer interval. For this reason it is preferred to keep the refrigeration back-up battery and PC back-up battery separate.
  • In one preferred embodiment, the refrigerator lock includes a key lock cylinder permitting override access for allowing supervisory (i.e., pharmacy) personnel to open the pharmaceutical refrigerator during absence of said AC power. The lock can be maintained in a disabled state after resumption of AC power, if there has been a possible temperature compromise.
  • A temperature probe that senses temperature inside said refrigerator cabinet is coupled with control electronics, and the latter is operative to store at least one predetermined temperature limit, or upper and lower limits. The sensed temperature is compared with the stored temperature limit(s), and is operative to disable the refrigerator unlock facility if the sensed temperature is beyond the limit(s), so that the staff is denied normal access if the temperature has been beyond the acceptable range for longer than some maximum time. The temperature is tracked, minute by minute, and a real-time log is maintained and is made available, e.g. to pharmacy staff, either via the hospital computer network or over the Internet. Alarm message are sent out when a temperature alarm condition is reached, and also when there is a power outage. In some embodiments, a humidity sensor positioned in the refrigerator cabinet sends a sensed humidity signal to the control electronics, where it is compared with stored humidity threshold values. Then the unlock facility can be disabled if the sensed humidity is outside predetermined humidity limits so that the refrigerator door lock is prevented from being unlocked. Audit trail software can recording each time of opening of the refrigerator door lock and can also record the identity of each requesting person associated with such openings of the refrigerator door lock.
  • The cabinet PC computer may use the same storage battery arrangement as is used for powering the compressor during a power outage, or more preferably a separate UPS device is used for the computer.
  • The pharmacy staff or other person responsible for the refrigerated cabinet can monitor the temperature remotely for each individual patient pharmaceutical storage cabinet, using the temperature and power outage logs that are available over the computer network or over the Internet. This allows the staff to make decisions about recovery of pharmaceuticals from the refrigerated storage cabinets, and allows them to set priorities for recovery, resupply, and for disposal, if necessary, of possibly compromised materials.
  • Similar refrigerator or temperature controlled cabinets may be used in the radiology laboratory for controlled storage of items such as radiology contrast materials of or other temperature-sensitive pharmaceuticals. Also, the refrigerator may be used for storage of certain sensitive food products, where the patient has a prescribed dietary routine.
  • The above and many other objects, features, and advantages of this invention will become apparent from the ensuing description of a selected preferred embodiment, which is to be considered in connection with the accompanying Drawing.
  • BRIEF DESCRIPTION OF THE DRAWING
  • FIG. 1 is a perspective view of a medications cabinet with incorporated pharmaceutical refrigerator, according to one preferred embodiment of this invention.
  • FIG. 2 is a perspective view of a portion of the embodiment.
  • FIG. 3 is a schematic diagram for explaining this embodiment of the invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • A preferred embodiment of this medications cabinet can be favorably applied in a satellite pharmacy (on the patient hospital floor). In addition, the mechanism can be used to control drug monitoring in any location where temperature sensitive/humidity sensitive pharmaceuticals are stored. Anytime there is a problem, the PC and remote lock, powered by an uninterruptible power supply, can send a text message to the facility director to notify him that there is an issue, in time to deal with the problem and before the need arises to simply dispose of a large quantity of expensive medications. Inventory of the pharmaceutical cabinet can be automatically tracked and reported to the pharmacist, so that refill can be scheduled in a convenient manner.
  • With reference to the Drawing, and initially to FIGS. 1 and 2, a medication dispensing arrangement in a hospital pharmacy or pharmacy of other health care facility employs a dispensing cabinet 10, for storage and controlled access to medications and pharmaceuticals, some of which may need to be kept refrigerated. The cabinet shown here is a floor mounted medications cabinet 10, although other cabinets could be mounted on the wall of the patient room. The purpose of the medications cabinet 10 is to provide controlled access to non-refrigerated medications in one or more computer locked drawers or to refrigerated medications in an included refrigerator.
  • The cabinet 10 has a vertically arranged frame 12 which extends upward from a base 14 to a top 16, and has a number of locking compartments 18 as well as a locking drawer 20, in which medical supplies, medications, dressings, etc, can be stored for use with a patient. A medical refrigerator 22 is built into the cabinet, here between the base 14 and the lowermost locking drawer 20. The refrigerator 22 has an insulated cabinet 24 built into the frame 12, and has a front door 26 that closes off the front of the refrigerator cabinet 24. Here the door 26 is hinged at the left and opens from the right, but the unit could be arranged otherwise. As shown in FIG. 2, the refrigerator cabinet 24 can be provided with a number of shelves for storing the refrigerated materials.
  • The refrigerator 22 is provided with a door lock 30, which can be of the general type described in Shoenfeld published application US 2009/0231132. Here the door lock 30 has a body portion 32 (shown in broken line) built into the right front post of the cabinet frame 12, and a door portion 34 (also shown in broken line) that is built into one edge of the refrigerator door 26. The door lock body portion 32 has a solenoid and controlling electronics to permit remote actuation, e.g. via a network such as the hospital LAN. The door lock 30 releases the refrigerator door 26 by actuation of a solenoid. Also, the door portion 34 may have a key lock 36 to permit access in the event of a lockdown event, such as AC power loss. Presumably, only a person with master access, e.g., pharmacy director, would be provided with a key.
  • The cabinet itself has solenoid locks with momentary contact switches built into the right front post support of the cabinet frame. There are three such locks here, one each for the doors for the two compartments 18 and one for the refrigerator door 26.
  • In this embodiment, the cabinet 10 is provided with a personal computer 40, with keyboard, screen, and other interactive devices, and this interconnects with controls for the refrigerator door lock 30 as well as locking devices for the compartments and drawers 18 and 20. The computer 40, shown here supported on a shelf 42 at one side of the cabinet frame 12, is suitably programmed to recognize access codes from authorized persons, and to generate unlock signal(s) for the refrigerator lock and other cabinet locks. In other embodiments an associated touch-screen computer can be employed for the authorized health care provider to enter an authorization code to achieve access to the cabinet drawer(s) and refrigerator. The same personal computer or touch screen computer may communicate via the hospital LAN to generate and send alert messages, and to track activity involving the cabinet and keep an audit trail of times of opening and closing of the refrigerator 22.
  • The door lock assembly 30 may be directly connected with the LAN or network. The body portion 32 of the refrigerator lock 30 contain an electronics circuit board with an ethernet port or USB port and suitably programmed controller microprocessor, which can be programmed to accept and/or transmit self-descriptive command data packets, so that the hospital computer system will assign each refrigerator lock assembly a unique identifier code. A customized USB driver engineered specifically for this refrigerator lock can also be uploaded onto the hospital server. A similar system is employed when ethernet or other network system is employed. A microprocessor that is included on the refrigerator door lock is programmed to open the refrigerator lock remotely when an unlock code is received. The microprocessor may also be programmed with a predetermined temperature limit, i.e., a high temperature limit, a low temperature limit, or both, which can be set by pharmacy personnel. A humidity limit can also be set and programmed into the microprocessor. In the event that there is a temperature event (or humidity event) detected, i.e., the temperature in the interior of the refrigerator cabinet is outside the temperature limit (or alternatively the temperature remains outside the limit for some period of time), the microprocessor will automatically block the facility for remote opening of the lock. The microprocessor also includes a facility for generating an alert message if a temperature event of that type occurs (or if the detected humidity is too high or too low). The alert message will identify the refrigerator and the nature of the problem, and will automatically be transmitted (as an email or text message) to a predetermined addressee (or addressees), and sent over the hospital computer network.
  • Also shown here are a temperature sensor 44 and a relative humidity sensor 45 that are positioned in the interior of the refrigerator cabinet 24 and connected by wire to the circuit board of the refrigerator lock. A proximity sensor or microswitch is disposed at or adjacent the refrigerator door 26, and is coupled to the circuit board to provide an indication of the open/closed status of the door 26, which can then be communicated via the cable and LAN to the hospital computer system. The system can be programmed to alert the pharmacy personnel if one of the refrigerators fails to maintain a sufficiently cool interior temperature. This may be done by transmission of a text message or electronic mail automatically generated by the microprocessor of the circuit board.
  • Here, the refrigerator 22 has a refrigeration circuit 50 that is capable of operating either on standard AC mains power (e.g., 110 volts, 60 Hz) or on DC backup power (e.g., 12 volts DC).
  • The refrigeration circuit 50 has a compressor unit 52 that is favorably mounted on the top 14 of the cabinet. The compressor 52 has a pressure port P supplying high-pressure gas and a suction port S receiving low-pressure vapor. The pressure port P of the compressor leads to a condenser coil 54, where the refrigerant condenses to high pressure liquid, which passes through an expansion valve 56 to an evaporator coil 58 that is positioned inside the refrigerator cabinet 24. There, the liquid evaporates at low pressure, and is returned to the suction port S of the compressor. A battery back up system 60, e.g., a so-called uninterruptible power supply or UPS, is located at the top 14 of the cabinet 10. Preferably, there is a separate UPS device 60 a (FIG. 1) for the computer 40. The back up system 60 contains a storage battery 62 and a trickle charger 64. The latter has inputs connected with AC power cable 70 for recharging the battery from the standard AC line power. Power cables from the 12 volt storage battery 62 and the AC power cable 70 are coupled with a switching mechanism 66, which applies AC power to the compressor when available, but switches to battery power when the AC power is not present, i.e., during a power outage, or in the event that someone inadvertently unplugs or damages the cabinets's power cord. A sensor 68 detects whether the AC power is present. This sensor 68 is also connected to a data input of the computer 40, so the latter can send an alert message to predetermined addressees in the event the AC power disappears and the unit switches over to DC backup power. The switching mechanism 66 and sensor 68 may also be operative to switch over to battery power if low AC line voltage conditions (i.e., “brown out” conditions) are detected.
  • Preferably, the UPS or back up battery power is also furnished to the computer 40 so that it remains operative during a power failure.
  • As shown, e.g., in FIG. 2, the refrigerator 22 has a temperature control 72 for setting the internal temperature. This may include the humidity sensor 45 and a temperature sensor 44 (FIG. 3) which may be coupled to data input(s) of the computer 40.
  • This permits the computer 40 to continuously monitor temperature and humidity conditions in the interior of the refrigerator. As long as the temperature and humidity are within limits (established by presets loaded onto the computer 40), i.e., if the temperature and humidity are in the acceptable ranges, normal access is available. If not, the normal refrigerator unlock feature is disabled and an alert message is sent electronically, e.g., through the hospital network.
  • Once a temperature condition (or humidity condition) occurs such that the refrigerator contents are potentially compromised, the staff will be unable to open the refrigerator and access the possibly-compromised materials. This means that the potentially compromised drugs will not be distributed. However, the pharmacy director (who has been alerted to this situation by electronic message) can access the refrigerator lock by key, and can retrieve the contaminated or potentially compromised drugs. The pharmacy personnel can then replace those drugs with fresh ones, and reset the refrigerator lock to open normally.
  • In the event that AC power is lost, the compressor 52 will automatically switch over to battery power, and will continue to run the refrigeration circuit to keep the contents cool in the interior of the refrigerator cabinet. The loss of AC power is detected and sent to the computer 40, which then disables the unlock facility for the refrigerator door lock 30. Consequently, during the time that the refrigerator is operating on battery backup, the staff will not be able to open the refrigerator door. This conserves the cold air within the unit, and reduces the chance that the contents will become compromised due to elevated temperatures. At the same time, the pharmacy personnel are alerted to the power failure, and are provided with minute-by-minute temperature and humidity status. The pharmacy director may authorize release of the door lock if the pharmaceuticals are still uncompromised and are immediately needed for patient use. This allows the pharmacy staff to plan to recover some of the temperature sensitive drugs from the cabinet(s) 10, as need be, and to set a priorities for recovery. The authorized pharmacy personnel can be provided either with key access or with a master override code.
  • While the invention has been described hereinabove with reference to selected preferred embodiments, it should be recognized that the invention is not limited to those precise embodiments. Rather, many modification and variations would present themselves to persons skilled in the art without departing from the scope and spirit of this invention, as defined in the appended claims.

Claims (9)

  1. 1. A controlled access pharmaceutical storage case comprising a frame having a base and a top, a plurality of storage spaces within said frame arranged vertically one above the other; and a pharmaceutical refrigerator located in said frame on said base, and including a refrigerator cabinet and a door that closes against the refrigerator cabinet; a remotely actuable refrigerator door lock for locking and unlocking the refrigerator door including a data port connecting with a programmed electronic control arrangement;
    a refrigeration circuit that includes a compressor mounted at the top of the storage case and having a pressure port and a suction port, a condenser coil coupled to said pressure port and leading to an expansion valve, followed by an evaporator coil within the refrigerator cabinet and being connected with the suction port of the compressor;
    wherein said compressor is adapted to be operable when powered by standard AC line power or when powered by DC battery power;
    AC power cables coupled to a source of said standard AC line power;
    a storage battery arrangement providing DC battery power to said compressor and to said electronic control arrangement;
    charging means coupled to said AC power cables for supplying charging power to said storage battery arrangement;
    power sensor means coupled with said AC power cables and said storage battery arrangement for sensing whether AC power is present and coupling the compressor to the AC power cables when AC power is present but connecting the compressor to the storage battery arrangement when AC power is absent;
    said power sensor means being coupled to a data input of said electronic control arrangement;
    said computer arrangement having an unlock facility operative for receiving unlock commands specific to the refrigerator door lock, and unlatch the refrigerator door lock upon receipt of said unlock command to permit authorized hospital personnel access to the contents of the refrigerator, but operative to disable said unlock facility and prevent access to the contents of the refrigerator if the power sensor means detects that the AC power is absent for a period of time that exceeds a predetermined time interval.
  2. 2. Controlled access pharmaceutical cabinet of claim 1 wherein said storage battery and said charging means are disposed at the top of said storage case.
  3. 3. Controlled access pharmaceutical cabinet of claim 1 wherein said programmed control arrangement is adapted to generate and transmit an alert message to a predetermined addressee in the event that said AC power is absent for longer than a predetermined time interval.
  4. 4. Controlled access pharmaceutical cabinet of claim 1 in which said refrigerator lock includes a key lock cylinder permitting override access for allowing supervisory personnel to open the pharmaceutical refrigerator during absence of said AC power.
  5. 5. Controlled access pharmaceutical cabinet of claim 1 further comprising a temperature monitor having a probe sensing temperature inside said refrigerator cabinet, the temperature monitor being coupled with said programmed control arrangement to transmit the sensed temperature thereto; and wherein said control arrangement is operative to store at least one predetermined temperature limit, and to compare the sensed temperature with said at least one predetermined temperature limit, and is operative to disable said unlock facility if the sensed temperature is outside said predetermined temperature limit so that the refrigerator door lock is prevented from being unlocked remotely.
  6. 6. Controlled access pharmaceutical cabinet of claim 5 further including means for communicating a temperature alarm to said remote computer system when the sensed temperature is beyond said limit.
  7. 7. Controlled access pharmaceutical cabinet of claim 1 wherein said programmed control arrangement is adapted to generate and transmit an alert message to a predetermined addressee in the event that the power sensor means detects that the AC power is absent.
  8. 8. Controlled access pharmaceutical cabinet of claim 7 further comprising a humidity sensor positioned within said refrigerator cabinet and being coupled with said programmed circuit arrangement to transmit a sensed humidity thereto; and wherein the programmed circuit arrangement is operative to store at least one predetermined humidity limit, and to compare the sensed humidity from said humidity sensor with said at least one predetermined humidity limit, and is operative to disable said unlock facility if the sensed humidity is outside said predetermined humidity limit so that the refrigerator door lock is prevented from being unlocked.
  9. 9. Controlled access pharmaceutical cabinet of claim 1 wherein said control arrangement includes audit trail software for recording each time of opening of the refrigerator door lock and also recording identity of each requesting person associated with such openings of the refrigerator door lock.
US12854486 2006-03-29 2010-08-11 Medical Storage Case with Remote Unlocking Refrigerator with thermal Spoilage Protection Abandoned US20100300130A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US11391986 US20070227204A1 (en) 2006-03-29 2006-03-29 Remotely actuated refrigerator lock
US12470541 US8063735B2 (en) 2006-03-29 2009-05-22 Remotely actuated refrigerator lock with thermal spoilage protection
US12854486 US20100300130A1 (en) 2006-03-29 2010-08-11 Medical Storage Case with Remote Unlocking Refrigerator with thermal Spoilage Protection

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US12854486 US20100300130A1 (en) 2006-03-29 2010-08-11 Medical Storage Case with Remote Unlocking Refrigerator with thermal Spoilage Protection

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