System for controlling flow through a line during intravenous drug delivery

• US 20010007932A1
• Filed: 02/27/2001
• Published: 07/12/2001
• Est. Priority Date: 08/22/1997
• Status: Abandoned Application

• Current Assignee: Charles M. Grinnell, Dean Kamen, Dennis Gilbreath, Jason A. Demers, Kevin Grant, Marc A. Mandro, Richard Lannigan, Robert Manning, William T. Larkins
• Original Assignee: Charles M. Grinnell, Dean Kamen, Dennis Gilbreath, Jason A. Demers, Kevin Grant, Marc A. Mandro, Richard Lannigan, Robert Manning, William T. Larkins
• Inventors: Lannigan, Richard, Demers, Jason A., Mandro, Marc A., Kamen, Dean L., Grant, Kevin, Larkins, William T., Manning, Robert, Grinnell, Charles M., Gilbreath, Dennis
• Application Number:
  US09/793,930
• Publication Number:
  US 20010007932A1
• Time in Patent Office: Days
• US Class Current: 604/132
• CPC Class Codes: A61M 2005/1402 Priming
• CPC Class Codes: A61M 2005/1403 Flushing or purging
• CPC Class Codes: A61M 2005/14208 with a programmable infusion control system, characterised by the infusion program
• CPC Class Codes: A61M 2205/123 with incorporated reservoirs
• CPC Class Codes: A61M 2205/128 with incorporated valves
• CPC Class Codes: A61M 2205/35 Communication
• CPC Class Codes: A61M 2205/8206 battery-operated
• CPC Class Codes: A61M 2206/22 eliminating pulsatile flows, e.g. by the provision of a dampening chamber
• CPC Class Codes: A61M 39/24 Check- or non-return valves
• CPC Class Codes: A61M 5/1409 in series, e.g. first substance passing through container holding second substance, e.g. reconstitution systems needle sets A61M5/162
• CPC Class Codes: A61M 5/1413 Modular systems comprising interconnecting elements
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/14224 Diaphragm type
• CPC Class Codes: A61M 5/16809 by repeated filling and emptying of an intermediate volume pressure infusion using positive displacement pumps A61M5/142
• CPC Class Codes: A61M 5/16827 controlling delivery of multiple fluids, e.g. sequencing, mixing or via separate flow-paths infusion of multiple fluids without using a controller A61M5/1407
• CPC Class Codes: A61M 5/16831 Monitoring, detecting, signalling or eliminating infusion flow anomalies low-level float-valves causing cut-off A61M5/40; indicating or recording presence, absence or direction of flow in general G01P13/0066
• CPC Class Codes: A61M 5/16854 by monitoring line pressure
• CPC Class Codes: A61M 5/16877 Adjusting flow; Devices for setting a flow rate
• CPC Class Codes: A61M 5/365 Air detectors A61M5/1684 takes precedence; in extracorporeal blood circuits A61M1/3626
• CPC Class Codes: A61M 5/5086 for indicating if defective, used, tampered with or unsterile
• CPC Class Codes: F16K 5/0414 : Plug channel at 90 degrees to the inlet
• CPC Class Codes: F16K 5/0478 : on the plug

Abstract

A system for controlling flow through a line during intravenous drug delivery. The system is capable of use in conjunction with a bedside-pharmacy system for the preparation and delivery of intravenous drugs. The system includes a disposable cassette with first and second valve chambers and a control unit into which the cassette is capable of being received. The control unit has a cam and first and second actuators. The bedside-pharmacy system may include a liquid inlet for connection to a liquid supply, vial receptacles, and a liquid outlet for providing the intravenous drug in mixed, liquid form to the patient. That system may include a chamber having a variable volume, and a valve mechanism, which may be actuated to control flow between the liquid outlet, the variable-volume chamber, the vial receptacles and the liquid inlet. That system induces change in the volume of the variable-volume chamber and actuates the valve mechanism, so as to introduce liquid from the liquid inlet into the vials and reconstitute or dilute the drugs and so as to deliver the drugs to the patient.

Claims

1. A system for controlling flow through an intravenous line, the system comprising:

a disposable cassette having;

a first valve chamber defined by a first rigid wall and a first flexible membrane, and

a second valve chamber defined by a second rigid wall and a second flexible membrane; and

a control unit having

a cam,

a first actuator disposed adjacent the first flexible membrane so that movement of the first actuator causes a change in pressure on the first flexible membrane, and

a second actuator disposed adjacent the second flexible membrane so that movement of the second actuator causes a change in pressure on the second flexible membrane,

wherein the cam and actuators are disposed with respect to each other such that, as the cam is rotated, the actuators are moved.

2. The system of

claim 1

wherein the cam is shaped so that, at any time, at least one actuator is urging the corresponding flexible membrane into a closed position.

3. The system of

claim 2

wherein the cassette further includes a pressure-conduction chamber located in a fluid passageway between the first and second valve chambers.