Dialysis pressure monitoring with clot suppression
First Claim
1. A tubular set and system for conveying blood and for permitting sensing of the pressure of said blood, which comprises:
- a length of main blood flow tubing;
a branch connection tube that connects into branching relation with said blood flow tubing at one end, and which carries a connector at its other end in operative connection with a pressure transducer unit; and
in which the branch connection tube is filled with an aqueous, isotonic, substantially cell-free solution in a first portion spaced from sad other end;
a second portion of said branch connection tube adjacent to said connector at its other end being air filled, spacing the aqueous solution in said branch connection tube from the connector; and
a priming solution tube, connected to a source of priming solution, said priming solution tube being connected in branching relation with the branch connection tube.
5 Assignments
0 Petitions
Accused Products
Abstract
Pressure is sensed in blood flow tubing by placing an aqueous, preferably isotonic, substantially cell-free solution into branch connection tubing that connects in branching relation with the blood flow tubing at one end. The branch connection tubing also connects in use with a pressure transducer unit at its other end. An air volume is maintained, occupying a portion of the branch connection tubing which is adjacent to the other end. One flows positively or negatively pressurized blood through the blood flow tubing, with the result that the pressure of the blood is communicated through the aqueous solution and the air volume in the branch connection tubing to the pressure transducer unit, with the blood being spaced from the air volume. Preferably, substantially all of the branch connection tubing containing the aqueous solution and air volume has an inner diameter of substantially no more than 5 mm. This facilitates the continued separation of blood and solution when pressurized blood enters the branch connection tubing through the one end.
122 Citations
17 Claims
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1. A tubular set and system for conveying blood and for permitting sensing of the pressure of said blood, which comprises:
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a length of main blood flow tubing;
a branch connection tube that connects into branching relation with said blood flow tubing at one end, and which carries a connector at its other end in operative connection with a pressure transducer unit; and
in which the branch connection tube is filled with an aqueous, isotonic, substantially cell-free solution in a first portion spaced from sad other end;
a second portion of said branch connection tube adjacent to said connector at its other end being air filled, spacing the aqueous solution in said branch connection tube from the connector; and
a priming solution tube, connected to a source of priming solution, said priming solution tube being connected in branching relation with the branch connection tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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8. A tubular set and system for conveying blood and for permitting sensing of the pressure of said blood, which comprises:
a length of main extracorporeal blood flow tubing;
a branch connection tube that connects in branching relation with said blood flow tubing at one end and which carries a connector at its other end in operative connection with a pressure transducer unit;
said branch connection tubing filled with an aqueous, isotonic, substantially cell-free solution in a first portion spaced from said other end, said branch tubing being filled with air in a second portion adjacent to said other end.
Specification