Contrast media injector
First Claim
Patent Images
1. Apparatus for delivering gas into an animal'"'"'s cardio-vascular system to enable the gas to function as an angiographic contrast medium comprising:
- a source of the desired gas,a catheter adapted to be coupled into the animal'"'"'s cardio-vascular system,injection control means responsive to the cardiac cycle to provide a first control signal during systole and a second control signal during diastole,valve means connecting said source to said catheter,said valve means being responsive to said control signals to provide said gas at a first rate during systole and a second rate during diastole.
6 Assignments
0 Petitions
Accused Products
Abstract
An apparatus is provided to deliver carbon dioxide to an animal in a manner which allows the carbon dioxide to totally displace blood in an area of interest and to thus serve as a contrast media for angiographic procedures, or blood displacement media for angioscopic or laser procedures. The apparatus enables the carbon dioxide to flow at varied flow rates, the varied flow rates correlated to the varied flow rate of blood in the animal'"'"'s vascular system. The flow rate of the carbon dioxide is variable during the course of a single injection.
-
Citations
27 Claims
-
1. Apparatus for delivering gas into an animal'"'"'s cardio-vascular system to enable the gas to function as an angiographic contrast medium comprising:
-
a source of the desired gas, a catheter adapted to be coupled into the animal'"'"'s cardio-vascular system, injection control means responsive to the cardiac cycle to provide a first control signal during systole and a second control signal during diastole, valve means connecting said source to said catheter, said valve means being responsive to said control signals to provide said gas at a first rate during systole and a second rate during diastole. - View Dependent Claims (2, 3)
-
-
4. An apparatus for injecting gas into an animal in a manner which allows the gas to totally displace blood in an area of interest, the apparatus comprising:
-
an injector comprising means for connecting to a source of gas; a catheter comprising mans for connecting to aid injector and through which the gas enters into the animal; said injector comprising means for varying the flow rate of gas through the injector and the catheter at a first flow rate during systole and a second flow rate during diastole so that a pulsatile flow of gas synchronous to the flow of blood in the animal'"'"'s vascular system is achieved. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A method of delivering gas into an animal'"'"'s vascular system to enable the gas to function as an angiographic contrast medium, the method including the steps of:
-
(a) determining a desired flow rate of gas to be delivered during systole; (b) determining a desired flow rate of gas to be delivered during diastole; (c) determining the total volume of gas to be delivered; (d) introducing the gas into the animal using a catheter; (e) gathering, on an on-going basis, information relating to the animal'"'"'s cardiac cycle; (f) gathering information relating to the animal'"'"'s blood pressure; (g) providing a microprocessor with the information determined in steps (a), (b), (c), (e) and (f) and with the length and diameter of the catheter; (h) providing an injecting apparatus and connecting said apparatus to both said catheter and to a source of gas, the injecting apparatus including means to vary the flow rate of gas through the apparatus, said means being controlled by said microprocessor such that the gas will flow at a first flow rate during systole and at a second flow rate during diastole to totally displace the blood in an area of interest to enable angiographic study. - View Dependent Claims (19, 20, 21, 22)
-
-
23. A method of delivering gas into an animal'"'"'s cardiovascular system to enable the gas to function as an angiographic contrast medium comprising the steps of:
injecting the gas at a first predetermined flow rate during systole an a second predetermined flow rate during diastole which synchronizes with systolic and diastolic phases of the cardiac cycle to provide total displacement of blood by the gas in an area of interest. - View Dependent Claims (24, 25, 26, 27)
Specification