Perfusion Device with Compensation of Medical Infusion During Wear-Time

• US 20090318791A1
• Filed: 06/15/2007
• Published: 12/24/2009
• Est. Priority Date: 06/30/2006
• Status: Abandoned Application

• Current Assignee: Novo Nordisk A/S
• Original Assignee: Novo Nordisk A/S
• Inventors: Kaastrup, Peter
• Application Number:
  US12/305,688
• Publication Number:
  US 20090318791A1
• Time in Patent Office: Days
• US Class Current: 600/365
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/4839 combined with drug delivery
• CPC Class Codes: A61M 2005/14208 with a programmable infusion control system, characterised by the infusion program
• CPC Class Codes: A61M 2205/3331 Pressure; Flow
• CPC Class Codes: A61M 2230/201 Glucose concentration
• CPC Class Codes: A61M 5/14244 adapted to be carried by the patient, e.g. portable on the body
• CPC Class Codes: A61M 5/16886 for measuring fluid flow rate, i.e. flowmeters
• CPC Class Codes: A61M 5/172 electrical or electronic A61M5/16804, A61M5/16831 take precedence
• CPC Class Codes: A61M 5/1723 using feedback of body parameters, e.g. blood-sugar, pressure measurement of body parameters A61B5/00

Abstract

A medical action device is adapted to cooperate with an object to be inserted into a body and to cooperate with a timing device, able to start timing from the moment the object is inserted. This information is fed to a control unit whereby the control unit gets an input which can be used to compensate one or more parameters of the medical action as a function of the increased blood flow in the area around the inserted object over time due to the inflammation reaction.

Claims

1. A portable medical device adapted to perform a medical action, the medical action comprising an injection, an infusion or a monitoring of a physiological parameter, said device is in communication or has a fluid connection with a member to be inserted into a body,

said device comprising a timer adapted to produce an output corresponding to the time elapsed from the insertion of said member into the body,

and a controller, the controller comprising an algorithm or a look-up table,

wherein said controller is adapted to determine a wear time factor on the basis of the timer output and said algorithm or said look-up table, said wear time factor is applied by said controller to postpone said medical action or adjust one or more parameters of the medical action according to the time elapsed from the insertion of said member into the body.

2. A medical device according to claim 1,

wherein said postponement or adjustment are discrete constant values corresponding to discrete periods of time starting at the time said member was inserted into the body, said discrete constant values are pre-programmed into the controller.

3. A medical device according to claim 1,

wherein said portable device is a drug injection or infusion device and said controller is adapted to decrease the infusion flow rate or injection dose size according to the time elapsed from insertion of said member into the body in a first time period, to increase the infusion flow rate or injection dose size in a second time period, and to decrease the infusion flow rate or injection dose size in a third time period.

4. A medical device according to claim 1,

wherein said portable device is adapted to monitor blood glucose and that the blood glucose output value is delayed for a first time value during a first time period starting at the time said member was inserted into the body, the glucose output value is delayed for a second time value being smaller than the first time value and the glucose output value is delayed for a third time value being larger than the second time value.

5. A medical device according to claim 1,

wherein said wear time factor, wt(Ct), being the following values:

1 (0 hours), 0.95 (12 hours), 0.9 (24 hours), 0.85 (36 hours), 0.8 (48 hours), 0.75 (60 hours), 0.7 (72 hours).

6. A medical device according to claim 1,

wherein said wear time factor, wt(Ct) being the following values:

1 (0 hours), in the interval 0.5-0.9 (0-24) hours and in the interval 0.7-0.95 (24 hours-end time of member insertion).

7. A medical device according to claim 1,

wherein said wear time factor, wt(Ct) being the following values:

1 (0 hours), in the interval 0.5-0.9 (0-48) hours and in the interval 0.7-0.95 (48 hours-end time of member insertion).

8. A medical device according to claim 1,

wherein said medical device is an expelling device, said expelling device is adapted to reduce the flow rate by reducing the stroke volume or the stroke frequency.

9. A medical device according to claim 1,

wherein said medical device is an insulin injection or insulin infusion device.

10. A medical device according to claim 5, wherein said medical device is an expelling device, said expelling device is adapted to reduce the flow rate by reducing the stroke volume or the stroke frequency.