Valve port assembly with interlock
First Claim
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1. A method for establishing extracorporeal blood circulation from a patient'"'"'s vasculature, said method comprising:
- (a) inserting a first access tube into a first subcutaneous port connected to a first cannula implanted in a blood vessel to withdraw blood from the blood vessel into extracorporeal circulation;
(b) mechanically opening a first valve disposed between the first subcutaneous port and the first cannula in response to insertion of the first access tube into the first port;
(c) inserting a second access tube into a second subcutaneous port connected to a second cannula implanted in a blood vessel to return blood from extracorporeal circulation to the blood vessel;
(d) mechanically opening a second valve disposed between the second subcutaneous port and the second cannula in response to insertion of the second access tube into the second port, whereby a flow path from the second cannula to the second port is at least partly established; and
(e) mechanically opening a third valve disposed between the first subcutaneous port and the first cannula in response to insertion of the second access tube into the second port, whereby a flow path from the first port to the first cannula is established.
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Abstract
A dual port vascular access assembly comprises a first access port and a second access port. The linkage is coupled between the first access port to close the second access port in the absence of an access tube in the first access port. Such port assemblies are particularly useful for implantation in patients receiving hemodialysis. By connecting the first access port to the blood withdrawal side of the system, blood withdrawal will be automatically terminated upon cessation of blood returned to due loss of the return access tube in the port assembly.
120 Citations
4 Claims
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1. A method for establishing extracorporeal blood circulation from a patient'"'"'s vasculature, said method comprising:
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(a) inserting a first access tube into a first subcutaneous port connected to a first cannula implanted in a blood vessel to withdraw blood from the blood vessel into extracorporeal circulation;
(b) mechanically opening a first valve disposed between the first subcutaneous port and the first cannula in response to insertion of the first access tube into the first port;
(c) inserting a second access tube into a second subcutaneous port connected to a second cannula implanted in a blood vessel to return blood from extracorporeal circulation to the blood vessel;
(d) mechanically opening a second valve disposed between the second subcutaneous port and the second cannula in response to insertion of the second access tube into the second port, whereby a flow path from the second cannula to the second port is at least partly established; and
(e) mechanically opening a third valve disposed between the first subcutaneous port and the first cannula in response to insertion of the second access tube into the second port, whereby a flow path from the first port to the first cannula is established. - View Dependent Claims (2, 3, 4)
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Specification