Fluid path containing a pressure isolation valve
A fluid path set including a multi-patient use section adapted for connection with a pump device and a source of injection fluid, and a per-patient use section adapted for removable fluid communication with the multi-patient use section. The per-patient use section includes a pressure isolation mechanism having a first port adapted for connection to the pump device via the multi-patient use section, a second port adapted for connection to a patient, and a pressure isolation port adapted for connection to a source of medical fluid via the multi-patient use section. The per-patient use section includes a valve member biased to a normally open position permitting fluid communication between the first port, the second port, and the pressure isolation port, and movable to a closed position to close the pressure isolation port when fluid pressure reaches a predetermined pressure level sufficient to overcome a biasing force applied to the valve member.
1. A fluid path set for use in a fluid delivery system, comprising:
a multi-patient use section adapted for connection to a pump device and to a source of injection fluid; and
a per-patient use section adapted for removable fluid communication with the multi-patient use section, the per-patient use section comprising a pressure isolation mechanism, wherein the pressure isolation mechanism comprises: a first port adapted for connection to the pump device via the multi-patient use section, a second port adapted for connection to a patient, a pressure isolation port adapted for connection to a source of medical fluid via the multi-patient use section, a lumen connecting the first port and the second port, and a valve member biased to a normally open position permitting fluid communication between the first port, the second port, and the pressure isolation port, and movable to a closed position to close the pressure isolation port when fluid pressure in the lumen reaches a predetermined pressure level sufficient to overcome a biasing force applied to the valve member.
2. The fluid path set of claim 1 , wherein the multi-patient use section further comprises a multi-position valve adapted to selectively isolate the pump device, the source of the injection fluid, and the per-patient use section.
3. The fluid path set of claim 1 , further comprising a pressure transducer associated with the pressure isolation port.
4. The fluid path set of claim 1 , wherein the multi-patient use section further comprises an intervening drip chamber between the source of medical fluid and the pressure isolation port.
5. The fluid path set of claim 1 , wherein the multi-patient use section is connectable to the per-patient use section by a pair of connectors.
6. The fluid path set of claim 1 , wherein the lumen is in fluid communication with an automated or a manual valve having a waste port.
7. The fluid path set of claim 1 , further comprising a spike for connecting the multi-patient use section with the source of the injection fluid.
8. The fluid path set of claim 1 , wherein the valve member comprises a spring that applies the biasing force to maintain the valve member in the normally open position.
9. The fluid path set of claim 1 , wherein the valve member comprises a sealing portion for sealing the pressure isolation port when the valve member is in the closed position.
10. The fluid path set of claim 9 , further comprising a sealing seat that contacts the sealing portion of the valve member when the valve member is in the closed position.
11. The fluid path set of claim 1 , wherein the valve member is linearly movable between the normally open position and the closed position.
12. The fluid path set of claim 1 , wherein, in the normally open position, the pressure isolation mechanism is configured for permitting fluid flow through the lumen and permitting monitoring of a blood pressure of the patient.
13. A pressure isolation mechanism, comprising:
a housing defining a lumen with a first port, a second port, and a pressure isolation port; and
a valve member disposed within the housing, the valve member biased to a normally open position permitting fluid communication between the first port, the second port, and the pressure isolation port, and movable to a closed position to close the pressure isolation port when fluid pressure in the lumen reaches a predetermined pressure level sufficient to overcome a biasing force applied to the valve member.
14. The pressure isolation mechanism of claim 13 , further comprising a pressure transducer associated with the pressure isolation port.
15. The pressure isolation mechanism of claim 13 , wherein the lumen is in fluid communication with an automated or a manual valve having a waste port.
16. The pressure isolation mechanism of claim 13 , wherein the valve member comprises a spring that applies the biasing force to maintain the valve member in the normally open position.
17. The pressure isolation mechanism of claim 13 , wherein the valve member comprises a sealing portion for sealing the pressure isolation port when the valve member is in the closed position.
18. The pressure isolation mechanism of claim 17 , wherein the housing comprises a sealing seat that contacts the sealing portion of the valve member when the valve member is in the closed position.
19. The pressure isolation mechanism of claim 13 , wherein the valve member is linearly movable between the normally open position and the closed position.
20. The pressure isolation mechanism of claim 13 , wherein, in the normally open position, the pressure isolation mechanism is configured for permitting fluid flow through the lumen and permitting monitoring of a patient's blood pressure.