Pressure isolation mechanisms, method of use thereof and fluid delivery systems including pressure isolation mechanisms

• US 20050104444A1
• Filed: 12/20/2004
• Published: 05/19/2005
• Est. Priority Date: 10/18/2000
• Status: Active Grant

• Current Assignee: Bayer Healthcare LLC (Bayer AG)
• Original Assignee: Bayer Medical Care Inc. (Bayer AG)
• Inventors: Kwo, Jennie, Callan, Gerald W., Zirps, Christopher T., Beaulieu, Roderick H., Pedraza, Luis A.
• Granted Patent: US 8,852,147 B2
• Time in Patent Office: Days
• US Class Current: 303/114.100
• CPC Class Codes: A61M 2005/1403 Flushing or purging
• CPC Class Codes: A61M 2205/582 by tactile feedback
• CPC Class Codes: A61M 2209/01 Remote controllers for specific apparatus
• CPC Class Codes: A61M 31/005 for contrast media
• CPC Class Codes: A61M 39/22 Valves or arrangement of valves A61M39/02, A61M39/0247, A61M39/16 take precedence; regulating valves in infusion systems A61M5/16881; in devices worn by the patient for the reception of urine, faeces, catamenial or other discharge, or in colostomy devices A61F5/4405
• CPC Class Codes: A61M 5/007 for contrast media
• CPC Class Codes: A61M 5/14546 Front-loading type injectors
• 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: Y10T 137/7727 Excessive flow cut-off

Abstract

A pressure isolation mechanism for use in a medical procedure includes a lumen, an isolation port in fluid connection with lumen, and a valve having a first state and a second state. The first state occurs when the lumen and the isolation port are connected. The second state occurs when the lumen and the isolation port are disconnected. The lumen remains open for flow of fluid therethrough in the first state and in the second state. The valve is normally in the first state and is switchable to the second state when fluid pressure in the lumen reaches a predetermined pressure level. A pressure transducer can be in fluid connection with the isolation port of the pressure isolation mechanism A fluid delivery system includes a manually operated syringe and a pressure isolation mechanism as described above.

Claims

1. A pressure isolation mechanism for use in a medical procedure, comprising:

a lumen;

an isolation port in fluid connection with lumen; and

a valve having a first state and a second state, the first state occurring when the lumen and the isolation port are connected, the second state occurring when the lumen and the isolation port are disconnected, the lumen being open for flow of fluid therethrough in the first state and in the second state, the valve being normally in the first state and being switchable to the second state when fluid pressure in the lumen reaches a predetermined pressure level.

2. The pressure isolation mechanism of claim 1 wherein the valve is biased in the first state.

3. The pressure isolation mechanism of claim 1, further comprising a pressure transducer in fluid connection with the isolation port of the pressure isolation mechanism.

4. The pressure isolation mechanism of claim 2 wherein the pressure transducer is in communication with an actuator to control the state of the valve.

5. A fluid delivery system comprising:

a syringe; and

a pressure isolation mechanism in fluid communication with the syringe, the pressure isolation mechanism comprising;

a lumen;

an isolation port; and

a valve operably disposed between the lumen and the isolation port, the valve having a first state wherein the lumen and the isolation port are in fluid communication and a second state wherein the lumen and the isolation port are not in fluid communication, the lumen being open for flow of fluid therethrough in the first state and in the second state, the valve being normally in the first state and being switchable to the second state when fluid pressure in the lumen reaches a predetermined pressure level.

6. The fluid delivery system of claim 5 wherein the syringe is a hand-held syringe.

7. The fluid delivery system of claim 5, further comprising a second port in fluid communication with the lumen.

8. The fluid delivery system of claim 7, further comprising a second valve operably disposed between the second port and the lumen.

9. The fluid delivery system of claim 5, further comprising second and third ports in fluid communication with the lumen.

10. The fluid delivery system of claim 5 wherein the valve is biased in the first state.

11. The fluid delivery system of claim 10 wherein the valve is spring-biased in the first state.

12. The fluid delivery system of claim 5, further comprising a pressure transducer in fluid communication with the isolation port.