Extracorporeal blood circuit air removal system and method
First Claim
1. An air removal device of an extracorporeal blood circuit providing extracorporeal oxygenation of a patient'"'"'s blood by drawing venous blood from the venous system of a patient through a venous return line and delivering oxygenated blood through an arterial line to the arterial system of the patient during cardiopulmonary bypass surgery adapted to be performed on the patient in the presence of a perfusionist, the air removal device comprising:
- an air removal device housing enclosing a lower blood chamber and an upper blood inlet chamber;
an upper blood inlet through the air removal device housing to the upper blood inlet chamber that is sized and shaped to be coupled to the return line;
a lower blood outlet through the air removal device housing to the lower blood chamber that is sized and shaped to be coupled to a blood pump to draw blood into the upper blood inlet chamber and out of the lower blood chamber;
a purge port through the air removal device housing to the upper blood inlet chamber;
an upper air sensor comprising first and second piezoelectric elements at respective first and second locations of the air removal device housing having a portion of the upper blood inlet chamber between the first and second locations, the first and second locations being separated by a first distance;
a lower air sensor comprising third and fourth piezoelectric elements at respective third and fourth locations of the air removal device housing that are below the first and second piezoelectric elements, the third and fourth locations being separated by a second distance; and
wherein the first distance is different than the second distance.
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Accused Products
Abstract
A disposable, integrated extracorporeal blood circuit employed during cardiopulmonary bypass surgery performs gas exchange, heat transfer, and microemboli filtering functions in a way as to conserve volume, to reduce setup and change out times, to eliminate a blood reservoir, and to substantially reduce blood-air interface. Blood from the patient or prime solution is routed through an air removal device that is equipped with air sensors for detection of air. An active air removal controller removes detected air from blood in the air removal device. A disposable circuit support module is used to mount the components of the disposable, integrated extracorporeal blood circuit in close proximity and in a desirable spatial relationship to optimize priming and use of the disposable, integrated extracorporeal blood circuit. A reusable circuit holder supports the disposable circuit support module in relation to a prime solution source, the active air removal controller and other components.
187 Citations
11 Claims
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1. An air removal device of an extracorporeal blood circuit providing extracorporeal oxygenation of a patient'"'"'s blood by drawing venous blood from the venous system of a patient through a venous return line and delivering oxygenated blood through an arterial line to the arterial system of the patient during cardiopulmonary bypass surgery adapted to be performed on the patient in the presence of a perfusionist, the air removal device comprising:
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an air removal device housing enclosing a lower blood chamber and an upper blood inlet chamber; an upper blood inlet through the air removal device housing to the upper blood inlet chamber that is sized and shaped to be coupled to the return line; a lower blood outlet through the air removal device housing to the lower blood chamber that is sized and shaped to be coupled to a blood pump to draw blood into the upper blood inlet chamber and out of the lower blood chamber; a purge port through the air removal device housing to the upper blood inlet chamber; an upper air sensor comprising first and second piezoelectric elements at respective first and second locations of the air removal device housing having a portion of the upper blood inlet chamber between the first and second locations, the first and second locations being separated by a first distance; a lower air sensor comprising third and fourth piezoelectric elements at respective third and fourth locations of the air removal device housing that are below the first and second piezoelectric elements, the third and fourth locations being separated by a second distance; and wherein the first distance is different than the second distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification