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Method and apparatus for controlling an extra-corporeal blood treatment in a medical device

  • US 9,162,020 B2
  • Filed: 07/01/2011
  • Issued: 10/20/2015
  • Est. Priority Date: 07/08/2010
  • Status: Active Grant
First Claim
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1. Apparatus for controlling an extra-corporeal blood treatment in a medical device, comprising:

  • a blood treatment device, the blood treatment device being a dialyzer;

    an extra-corporeal blood transport line, having at least an arterial line configured to bring blood from a first access of a patient under treatment to said blood treatment device, a venous line configured to bring blood from said blood treatment device to a second access of the patient, and at least a first pump for moving blood in said extra-corporeal blood transport line;

    a fluid transport line for a treatment fluid for said blood, the fluid transport line adapted to bring the treatment fluid from a source to said blood treatment device and from said blood treatment device to an exit, and at least a second pump for moving the treatment fluid in the fluid transport line;

    at least a sensor adapted to provide a measure correlated to at least a treatment parameter of the extra-corporeal blood treatment or of the treatment device in the medical device;

    at least one storage memory; and

    at least a control device operatively connected at least with said storage memory and with said sensor;

    wherein said control device is configured for;

    receiving said measure from said sensor,correlating said measure at least with referential data of said treatment device for said treatment parameter provided from said at least one storage memory to obtain a first deviation value (DV1),comparing said first deviation value (DV1) with a first threshold (T1) to determine when the first deviation value (DV1) is less than or greater than the first threshold (T1),correlating said measure with patient historical data of said patient under treatment for said treatment parameter during an extra-corporeal blood treatment of said patient under treatment, provided from said at least one storage memory, to obtain a second deviation value (DV2),comparing said second deviation value (DV2) with a second threshold (T2) to determine when the second deviation value (DV2) is less than or greater than the second threshold (T2),detecting the occurrence of a first event when the first deviation value (DV1) is greater than the first threshold (T1) and the second deviation value (DV2) is less than the second threshold (T2),detecting the occurrence of a second event when the first deviation value (DV1) is less than the first threshold (T1) and the second deviation value (DV2) is greater than the second threshold (T2),determining that a first root-cause of the first deviation value (DV1) and the second deviation value (DV2) is related to delivery of the extra-corporeal blood treatment to the patient under treatment when the occurrence of the first event is detected,determining that a second root-cause of the first deviation value (DV1) and the second deviation value (DV2) is related to a deviation in a clinical status of the patient under treatment when the occurrence of the second event is detected.

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