Blood pump and oxygenator monitor-controller and display device

• US 4,401,431 A
• Filed: 06/26/1981
• Issued: 08/30/1983
• Est. Priority Date: 06/26/1981
• Status: Expired due to Term

• Current Assignee: Leon J. Arp
• Original Assignee: Leon J. Arp
• Inventors: Arp, Leon J.
• Primary Examiner(s): Apley, Richard J.
• Assistant Examiner(s): Yanulis, George
• Application Number:
  US06/277,887
• Time in Patent Office: 795 Days
• Field of Search: 128/214 E, 128/214 F, 128/24 R, 128/1 D, 128/214 R, 128/762, 128/700, 128/96, 128/670, 128/671, 128/672, 128/DIG. 3, 422/44-45, 604/4-6, 604/31, 604/50, 604/65-67
• US Class Current: 604/6.14
• CPC Class Codes: A61M 1/32 Oxygenators without membranes
• CPC Class Codes: A61M 1/361 before treatment
• CPC Class Codes: A61M 1/3612 after treatment
• CPC Class Codes: A61M 1/3621 Extra-corporeal blood circuits single-needle circuits A61M1/30
• CPC Class Codes: A61M 1/3623 Means for actively controlling temperature of blood
• CPC Class Codes: A61M 1/3663 Flow rate transducers; Flow integrators
• CPC Class Codes: Y10S 128/03 Heart-lung

Abstract

A blood pump and oxygenator monitor-controller and display device is disclosed. The device includes a plurality of data communication ports, a plurality of data and output control ports all operably connected to decision making or computer circuitry, and a plurality of digital and/or analog displays or controlling means responsive thereto for the purposes of displaying measured and calculated data and/or for monitoring and controlling the operation of various sub-systems contained in a blood pumping and oxygenating system.

Claims

1. A blood pump and oxygenator monitor-controller and display device comprising:

a plurality of sub-systems, said sub-systems being connected in fluid communication by a plurality of conduits, said conduits being connected to the blood supply of a patient, said blood supply being circulated from said patient through said subsystems and conduits and then back to said patient, said subsystems including transducers means for sensing parameter values of said blood supply and converting said parameter values into data input signals;

a plurality of data communication ports for receiving data input signals from said transducer means and being operably connected to decision making circuitry, said data communication ports transmitting said data input signals from said transducer means to said decision making circuitry;

a plurality of data output ports operably connected to said decision making circuitry for the purpose of receiving a plurality of signals produced by said decision making circuitry;

a plurality of data display devices operably connected to said data output ports for the purpose of receiving and displaying a plurality of signals transmitted from said data output ports;

a plurality of output control ports operably connected to said decision making circuitry for the purpose of receiving a plurality of signals produced by said decision making circuitry, said output control ports being operably connected to one or more of said sub-systems to modify the response or operation of the said sub-systems.

2. A blood pump and oxygenator monitor-controller and display device comprising:

a plurality of sub-systems, said sub-systems being connected in fluid communication by a plurality of conduits, said conduits being connected to the blood supply of a patient, said blood supply being circulated from said patient through said sub-systems and conduits and then back to said patient, said sub-systems including transducer means for sensing parameter values of said blood supply and converting said parameter values into data input signals;

a plurality of data communication ports for receiving data input signals from said transducer means, and containing multiplexing circuitry for the purpose of sequentially inputing signals from said transducer means to analog-to-digital converter circuitry, said data communication ports being operably connected to a digital computer for the purpose of transmitting input data to the said digital computer;

a plurality of digital type data output ports operably connected to said digital computer for the purpose of receiving a plurality of signals produced by said digital computer;

a plurality of digital type data display devices operably connected to said data output ports for the purpose of receiving and displaying a plurality of signals transmitted from said data output ports;

a plurality of digital type output control ports operably connected to said digital computer for the purpose of receiving a plurality of signals produced by said digital computer, said output control ports also being operably connected to said sub-systems to modify the response or operation of said sub-systems.

3. A blood pump and oxygenator monitor-controller and display device as defined in claim 2, wherein a plurality of said digital type data output ports contain digital-to-analog converters for the purpose of receiving a plurality of digital signals from the said digital computer and for converting said digital signals to a plurality of analog type display signals.

4. A blood pump and oxygenator monitor-controller and display device as defined in claim 3, wherein a plurality of linear type data display devices are operably connected to said data output ports, said linear type display devices receiving and displaying a plurality of analog signals transmitted from said data output ports, and wherein a plurality of said digital type control ports contain digital-to-analog converters for the purpose of receiving a plurality of digital signals from said digital computer and for converting said digital signals to a plurality of analog type control signals, said analog type control signals being transmitted to said sub-systems to modify the response or operation thereof.

9. A blood pump and oxygenator monitor-controller and display device as defined in claim 2, wherein said input signals from said transducers means include data for total hemoglobin content of the blood flowing through the device, blood flow rate, the percent of the total hemoglobin content which is saturated with oxygen for the blood entering a blood oxygenator sub-system, the percent of the total hemoglobin content which is saturated with oxygen for the blood leaving said blood oxygenator, the temperature of the blood leaving said blood oxygenator, and the heat exchanger water temperature;

and wherein the said digital computer uses said data to calculate the amount of oxygen transferred per minute by the blood oxygenator to the blood flowing through the device, said calculation being transmitted to and displayed by said display device.

10. A blood pump and oxygenator monitor-controller and display device as defined in claim 9, wherein a plurality of said digital type data output ports contain digital-to-analog converters for the purpose of receiving a plurality of digital signals from the said digital computer and for converting said digital signals to a plurality of analog type display signals.

11. A blood pump and oxygenator monitor-controller and display device as defined in claim 10, wherein a plurality of linear type data display devices are operably connected to said data output ports for the purpose of receiving and displaying a plurality of analog signals transmitted from said data output ports, and wherein a plurality of said digital type control ports contain digital-to-analog converter for the purpose of receiving a plurality of digital signals from said digital computer and for converting said digital signals to a plurality of analog type control signals, said analog type control signals modifying the response or operation of said sub-systems.

5. A blood pump and oxygenator monitor-controller and display device comprising:

a plurality of sub-systems, said sub-systems being connected in fluid communication by a plurality of conduits, said conduits being connected to the blood supply of a patient, said blood supply being circulated from said patient through said sub-systems and conduits and then back to said patient, said sub-systems including transducer means for sensing parameter values of said blood supply and converting said parameter values into data input signals;

a plurality of data communication ports for receiving data input signals from said transducer means and containing analog type circuitry for the purpose of receiving and conditioning analog type signals supplied to the inputs of said data communication ports by said transducer means, said data communication ports being operably connected to an analog type computer, said analog computer making comparisons between and among said input signals, performing calculations and producing a plurality of analog type output signals;

a plurality of analog type data output ports operably connected to said analog computer for the purpose of receiving a plurality of signals produced by said computer;

a plurality of analog type data display devices operably connected to said data output ports for the purpose of receiving and displaying a plurality of signals transmitted from said data output ports;

a plurality of analog type output control ports operably connected to said analog computer for the purpose of receiving a plurality of signals produced by said analog computer said output control ports being operably connected to said sub-systems to produce a plurality of control signals which modify the response or operation of said sub-systems.

6. A blood pump and oxygenator monitor-controller and display device as defined in claim 5, wherein a plurality of said analog type data output ports contain analog-to-digital converters for the purpose of receiving a plurality of analog signals from the said analog computer and for converting said analog signals to a plurality of digital type display signals.

7. A blood pump and oxygenator monitor-controller and display device as defined in claim 6, wherein a plurality of digital type data display devices are operably connected to said data output ports for receiving and displaying a plurality of digital signals transmitted from said data output ports, and wherein a plurality of linear type control ports operably connected to said digital computer contain analog-to-digital converters for the purpose of receiving a plurality of analog signals from said analog computer and for converting said analog signals to a plurality of digital type control signals said digital type control signals modifying the response or operation of said sub-systems.

12. A blood pump and oxygenator monitor-controller and display device as defined in claim 5, wherein the said analog type signals supplied to the inputs of said data communication ports include data for total hemoglobin content of the blood flowing through the device, blood flow rate, the percent of the total hemoglobin content which is saturated with oxygen for the blood entering a blood oxygenator sub-system, the percent of the total hemoglobin content which is saturated with oxygen for the blood leaving said blood oxygenator sub-system, the temperature of the blood leaving said blood oxygenator sub-system, and the water temperature of a heat exchanger sub-system.

13. A blood pump and oxygenator monitor-controller and display device as defined in claim 12, wherein a plurality of analog type data output ports contain analog-to-digital converters for the purpose of receiving a plurality of analog signals from the said analog computer and for converting said analog signals to a plurality of digital type signals.

14. A blood pump and oxygenator monitor-controller and display device as defined in claim 13, wherein a plurality of digital type data display devices are operably connected to said data output ports for the purpose of receiving and displaying a plurality of digital signals transmitted from said data output ports, and wherein a plurality of linear type control ports operably connected to said analog computers contain analog-to-digital converters for the purpose of receiving a plurality of analog signals from said analog computer and for converting said analog signals to a plurality of digital type control signals, said digital type control signals modifying the response or operation of one or more of said sub-systems.

8. A blood pump and oxygenator monitor-controller and display device comprising:

a plurality of sub-systems, said sub-systems being connected in fluid communication by a plurality of conduits, said conduits being connected to the blood supply of a patient, said blood supply being circulated from said patient through said sub-systems and conduits and then back to said patient, said sub-systems including transducer means for sensing parameter values of said blood supply and converting said parameter values into data input signals;

a plurality of data communication ports for receiving data input signals from said transducer means and being operably connected to decision making circuitry for the purpose of receiving a plurality of data input signals and transmitting said data input signals to said decision making circuitry, said data input signals including data for total hemoglobin content, blood flow rate, the percent of the total hemoglobin content which is saturated with oxygen for the blood entering a blood oxygenator sub-system, the percent of the total hemoglobin content which is saturated with oxygen for the blood leaving said blood oxygenator sub-system, the temperature of the blood leaving said blood oxygenator sub-system and the heat exchanger water temperature, said decision making circuitry using said data to calculate the amount of oxygen transferred per minute by said blood oxygenator sub-system to the blood flowing through said device;

a plurality of data output ports operably connected to said decision making circuitry for the purpose of receiving a plurality of signals produced by said decision making circuitry;

a plurality of data display devices operably connected to said data output ports for the purpose of receiving and displaying a plurality of signals transmitted from said data output ports;

a plurality of output control ports operably connected to said decision making circuitry for the purpose of receiving a plurality of signals produced by said decision making circuitry, said output control ports being operably connected to one or more of said sub-systems and producing a plurality of control signals to modify the response or operation of the said sub-systems.

15. A blood pump and oxygenator monitor-controller and display device comprising:

a plurality of sub-systems, said sub-systems being connected in fluid communication by a plurality of conduits, said conduits being connected to the blood supply of a patient, said blood supply being circulated from said patient through said sub-systems and conduits and then back to said patient, said sub-systems including transducer means for sensing parameter values of said blood supply and converting said parameter values into data input signals;

a plurality of data communication ports receiving data input signals from said transducer means and containing multiplexing circuitry for the purpose of inputing signals from said transducer means to analog-to-digital converter circuitry and operably connected to a digital computer, said digital computer performing calculations and making logical decisions, said input signals from said transducer means including data for total hemoglobin content of the blood flowing through the device, blood flow rate, the percent of the total hemoglobin content which is saturated with oxygen for the blood entering a blood oxygenator sub-system, the percent of the total hemoglobin content which is saturated with oxygen for the blood leaving said blood oxygenator, the temperature of the blood leaving said blood oxygenator, and the water temperature of a heat exchanger sub-system; and

wherein said digital computer performs calculations to determine the amount of oxygen transferred per minute by said blood oxygenator sub-system to the blood flowing through the device;

a plurality of digital type data output ports operably connected to said digital computer for the purpose of receiving plurality of signals produced by said digital computer;

a plurality of digital type data display devices operably connected to said data output ports for the purpose of receiving and displaying a plurality of signals transmitted from said data output ports;

a plurality of digital type output control ports operably connected to said digital computer for the purpose of receiving plurality of signals produced by said digital computer, said output control ports also operably connected to one or more of said sub-systems to produce a plurality of control signals to modify the response of said sub-systems.

16. A blood pump and oxygenator device, said device being connected to a patient for extracorporeal blood pumping and oxygenation of the patient'"'"'s blood supply during surgical procedures, comprising:

a plurality of sub-systems including a blood oxygenator and blood pump;

conduit means for fluidly connecting said sub-systems to the blood supply of the patient so that the blood supply circulates through said sub-systems;

said sub-systems further including transducer means in fluid communications with the blood supply flowing through said blood oxygenator and said blood pump, said transducer means sensing values of parameters of the blood supply and converting said parameter values into electrical signals;

at least one signal line in electrical connection with said transducer means; and

a means for displaying one or more of said parameter values, said parameter values being transmitted from said transducer means over said signal line to said display means.

17. The blood pump and oxygenator device of claim 16 wherein said signal lines are operably connected between said transducer means and a plurality of data communication ports, said data communication ports being operably connected to decision making and computing circuitry, said decision making and computing circuitry having at least one output operably connect to said display means.

18. The blood pump and oxygenator device of claim 16, further comprising a means for controlling one or more of said sub-systems in response to parameter values sensed by said transducer means.

19. The blood pump and oxygenator device of claim 16, wherein said transducer means includes a hemoglobin content transducer, an input oxygen saturation transducer operationally preceeding said blood oxygenator, an output oxygen saturation transducer operationally subsequent said blood oxygenator, and a blood flow rate transducer, the electrical output of said transducers being electrically input to computer circuitry wherein the metabolic oxygen consumption of the patient is calculated, said computer circuitry having an output operatively connected to said displaying means, said metabolic oxygen consumption being displayed by said displaying means.

20. The blood pump and oxygenator device of claim 17, wherein said transducer means further comprises a free gas detector transducer, said free gas detector transducer being operatively connected to a means for controlling a diversion valve, said free gas detector activating said diversion valve to divert the blood flowing through the device from flowing to the patient whenever free gas is detected in the blood flowing through the device by said free gas detector transducer.