Contrast medium delivery system and associated method

Abstract

A device cooperating with a pump for guiding a contrast medium from a source thereof to a catheter for delivery to a patient's vascular system. The device comprises a dual check valve, a tubular member, an in-line check valve and a three-port stopcock. The dual check valve has an inlet port connectable to the source of contrast medium, an inlet-outlet port connectable to the pump, and an outlet port coupled to the tubular member. The in-line check valve is connected to the tubular member at a point spaced from the dual check valve for preventing fluid flow towards the dual check valve. The stopcock connected at a first port to the in-line check valve, a second port of the stopcock being operatively connectable to the catheter. Using this device, medical personnel infuses contrast medium into the patient from the source without having to disconnect any element from the device during the infusion process.

Description

BACKGROUND OF THE INVENTIONThis invention relates to a device and a system for delivering contrast medium to a patient. The device and system are especially effective for delivering carbon dioxide gas to the vascular system of a patient. This invention also relates to an associated method for delivering contrast medium such as carbon dioxide gas to a patient.Delivery systems for contrast media have been used for many years in the medical field. Keeping the system a "closed system" so that no room air will be introduced is critical to the features of these delivery systems. With the advent of carbon dioxide gas or CO.sub.2 as a viable fluid for displacing blood in vessels for visualization under Digital Subtraction Angiography (DSA), the need to keep air out of the system is of even greater importance. Air and CO.sub.2 are invisible so introduction of air into a CO.sub.2 delivery system would pose a danger to a patient if it were inadvertently injected into the vasculature.CO.sub.2 h...

AI Technical Summary

Benefits of technology

Another object of the present invention is to provide such a device or system wherein air can be effectively eliminated prior to the feeding of the contrast medium to the patient.

In a device or system in accordance with the present invention for delivering contrast medium to a patient's vascular system, air can be effectively eliminated prior to the feeding of the contrast medium to the patient. Highly pressurized sources of contrast medium are isolated from the patient, thereby preventing inadvertent introduction of excessive amounts of contrast medium into the patient. Also, explosive introduction of gaseous contrast medium (carbon dioxide) into the patient can be minimized or eliminated.

Problems solved by technology

Air and CO.sub.2 are invisible so introduction of air into a CO.sub.2 delivery system would pose a danger to a patient if it were inadvertently injected into the vasculature.

But since CO.sub.2 is invisible introduction of room air into the system would pose a great danger to the patient.

The air would go undetected and, once in the patient's vasculature, could cause a blockage or even an air embolism to the brain resulting in a stroke or death.

The problem with this method is that the CO.sub.2 cylinder pressure is much higher than blood pressure (830 psi vs.

Images