Vascular interface

• US 4,258,717 A
• Filed: 09/06/1977
• Issued: 03/31/1981
• Est. Priority Date: 09/06/1977
• Status: Expired due to Term

• Current Assignee: Institute of Critical Care Medicine
• Original Assignee: Institute of Critical Care Medicine
• Inventors: Bisera, Jose, Weil, Max H., Carrington, James H.
• Primary Examiner(s): Michell, Robert W.
• Assistant Examiner(s): Wallen, T. J.
• Application Number:
  US05/830,847
• Time in Patent Office: 1,302 Days
• Field of Search: 128/1, 128/2 G, 128/2 R, 128/2 L, 128/214 B, 128/214 E, 128/2 F, 128/214 R, 128/247, 128/213, 128/637
• US Class Current: 600/486
• CPC Class Codes: A61B 5/02158 provided with two or more sensor elements
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150221 Valves
• CPC Class Codes: A61B 5/150229 Pumps for assisting the blood sampling
• CPC Class Codes: A61B 5/150992 Blood sampling from a fluid line external to a patient, such as a catheter line, combined with an infusion line; blood sampling from indwelling needle sets, e.g. sealable ports, luer couplings, valves tubing connectors and couplings A61M39/00
• CPC Class Codes: A61B 5/153 Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
• CPC Class Codes: A61B 5/155 Devices specially adapted for continuous or multiple sampling, e.g. at predetermined intervals devices loaded with multiple lancets simultaneously A61B5/15146
• CPC Class Codes: A61M 1/3621 Extra-corporeal blood circuits single-needle circuits A61M1/30
• CPC Class Codes: A61M 1/3646 Expelling the residual body fluid after use, e.g. back to the body

Abstract

Apparatus for facilitating the performance of medical procedures involving the vascular system of a patient, especially in a critical care environment, such as withdrawal of blood for analysis and infusion of medication. In the taking of a blood sample, blood flows through an arterial catheter connected to an artery of the patient, past a sample station, and then through a venous catheter that brings the blood back to the patient, the various mechanisms being connected by transparent plastic tubes. After a sample is taken, the tubes are flushed through the sample station, arterial catheter, and the venous catheter. Calibration of all pressure transducers requires application of high and low pressures to them, the high pressure being obtained by applying a high pressure (e.g. 200 mm Hg) to a bottle of saline solution which is also utilized to flush the tubes and which is connected to all of the transducers.

Claims

1. A vascular interface apparatus, for connection to a patient comprising:

an arterial station including an arterial station valve with first, second, and third ports and an arterial catheter coupled to said first port for connection to an artery of the patient;

a venous station including a venous catheter for connection to a vein of the patient;

a sample station which includes a sample valve having first, second, and third ports and a valve member movable to connect said first port to said second or third ports, and a syringe receiver means at said third port for receiving a syringe means that can hold a blood sample;

a first conduit coupling said second port of said arterial station valve to said first port of said sample valve;

a second conduit coupling said second port of said sample valve to said venous station;

means for operating said sample valve to interconnect said first and second sample valve ports to cause blood flow from an artery to a vein past said sample station, and to interconnect said first and third sample valve ports to enable the filling of a syringe means with a blood sample;

a flushing source which includes a container of saline solution coupled to said third port of said arterial

flushing means for operating said arterial station valve to connect said third port to said first port to flush said arterial catheter by passing saline solution through the first and second conduits and through the venous catheter to the patient;

an arterial transducer coupled to said arterial station to measure the arterial blood pressure;

a venous transducer coupled to said venous station to measure the venous blood pressure; and

means operable to apply a controlled pressure to said arterial and venous stations and to the transducers coupled thereto while blocking the application of blood pressure to said transducers, whereby to enable simultaneous calibration of the transducers to the same pressure while maintaining the sterility of the system.