US 2006/0224140 A1Published application

Method for delivery of therapeutic substances

AssigneeMedtronic, Inc.

InventorDouglas Junker

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Abstract

A method for transitioning between therapeutic substances to be delivered at different flow rates to a patient. The first therapeutic substance is delivered to the patient at a known flow rate, a bridge duration equal to the known volume divided by the known flow rate is calculated; and the flow rate is controlled following introduction of a second therapeutic substance into the reservoir. If the second flow rate is lower than the first flow rate, delivery is begun of at least one of the first therapeutic substance and the second therapeutic substance at the second flow rate at least as soon as the bridge duration is over. If the second flow rate is higher than the first flow rate, delivery is begun of the at least one of the first therapeutic substance and the second therapeutic substance at the second flow rate at least as late as when the bridge duration is over.

Claims9

Dependent claims

In a system for delivering a therapeutic substance at a flow rate to a patient, said system having a reservoir for holding said therapeutic substance operatively coupled to a delivery path of a known volume for delivering said therapeutic substance to said patient, a method of transitioning from delivery of a first therapeutic substance contained in said reservoir at a first flow rate to delivery of a second therapeutic substance at a second flow rate, comprising the steps of:

introducing said second therapeutic substance to said reservoir;
delivering at least one of said first therapeutic substance and said second therapeutic substance at a know flow rate;
calculating a bridge duration equal to said known volume divided by said known flow rate;
and
then controlling said flow rate following said introducing step:
if said second flow rate is lower than said first flow rate, beginning delivery of at least one of said first therapeutic substance and said second therapeutic substance at said second flow rate at least as soon as said bridge duration is over;
and
if said second flow rate is higher than said first flow rate, beginning delivery of said at least one of said first therapeutic substance and said second therapeutic substance at said second flow rate at least as late as when said bridge duration is over.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/429,896Filed 8 May 2006
Priority: 27 Mar 2002
Published: 5 Oct 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

A61M 5/14276
Adapted to be carried by the patient, e.g. portable on the body: specially adapted for implantation
A61M 5/16827
Active flow controllers: controlling delivery of multiple fluids, e.g. sequencing, mixing or via separate flow-paths
G16H 20/17
Relating to drugs or medications, e.g. for ensuring correct administration to patients: delivered via infusion or injection
A61M 5/16877
Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters: passive flow controllers; Devices for…

Family

Application60/368,477Us provisional application · filed 27 Mar 2002
Application10/400,152Division · filed 24 Mar 2003
Application11/429,896Division · filed 8 May 2006
US 2003/0216682 A1Published application
US 8,043,277 B2Related patent
US 8,128,616 B2Related patent
US 2006/0224140 A1This patent

From the US filing history. Foreign family members aren’t listed.