Blood loss detection for hemodialysis system
First Claim
1. A blood loss detection device for a hemodialysis system having a blood intake line, a dialysis machine including a pump, said dialysis machine in communication with said blood intake line, and a blood return line in communication with said dialysis machine, which detection device comprises:
- a patch having an external boundary edge circumnavigating said patch;
a central opening through said patch so that said patch surrounds said central opening, wherein said central opening is within said boundary edge and forms a target for receipt of a return access site and said blood return line so that said opening of said patch surrounds and encloses said target;
a slit through said patch extending between said boundary edge and said central opening;
a primary circuit loop circumnavigating said central opening terminating at two ends at said slit;
an early warning alarm circuit loop circumnavigating said central opening terminating at two ends at said slit;
an emergency shut-down circuit loop circumnavigating said central opening terminating at two ends at said slit, said emergency shut-down circuit loop independent from said early warning alarm circuit loop wherein said primary circuit loop, said early warning alarm circuit loop, and said emergency shut-down circuit loop are in a radial plane; and
a modular connector connecting said patch to an alarm activated by said early warning alarm circuit loop and to a switch mechanism actuated by said emergency shut-down circuit loop to shut down said dialysis machine and pump wherein said early warning alarm circuit loop is activated by a small blood leak and wherein said emergency shut-down circuit loop is activated by a larger blood loss.
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Accused Products
Abstract
A blood loss detection device for a hemodialysis system having a blood intake line, a dialysis machine including a pump, with the dialysis machine in communication with the blood intake line, and a blood return line in communication with the dialysis machine. The detection device includes a patch having an exterior edge and an opening through the patch forming a target for receipt of the return blood line. A slit through the patch extends between the exterior edge and the opening. A primary loop circuit terminates at two ends at the slit. An early warning alarm circuit loop terminates at two ends at the slit. An emergency shut-down circuit loop terminates at two ends at the slit. A modular connector connects the patch to an alarm activated by the early warning alarm circuit and to a switch mechanism activated by the shut-down circuit in order to shut down the dialysis machine and the pump.
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Citations
7 Claims
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1. A blood loss detection device for a hemodialysis system having a blood intake line, a dialysis machine including a pump, said dialysis machine in communication with said blood intake line, and a blood return line in communication with said dialysis machine, which detection device comprises:
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a patch having an external boundary edge circumnavigating said patch; a central opening through said patch so that said patch surrounds said central opening, wherein said central opening is within said boundary edge and forms a target for receipt of a return access site and said blood return line so that said opening of said patch surrounds and encloses said target; a slit through said patch extending between said boundary edge and said central opening; a primary circuit loop circumnavigating said central opening terminating at two ends at said slit; an early warning alarm circuit loop circumnavigating said central opening terminating at two ends at said slit; an emergency shut-down circuit loop circumnavigating said central opening terminating at two ends at said slit, said emergency shut-down circuit loop independent from said early warning alarm circuit loop wherein said primary circuit loop, said early warning alarm circuit loop, and said emergency shut-down circuit loop are in a radial plane; and a modular connector connecting said patch to an alarm activated by said early warning alarm circuit loop and to a switch mechanism actuated by said emergency shut-down circuit loop to shut down said dialysis machine and pump wherein said early warning alarm circuit loop is activated by a small blood leak and wherein said emergency shut-down circuit loop is activated by a larger blood loss. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of blood loss detection for a hemodialysis system having a blood intake line, a dialysis machine including a pump, said dialysis machine in communication with said blood intake line, and a blood return line in communication with said dialysis machine, which method comprises:
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placing a patch having an external boundary edge circumnavigating said patch and a central opening through said patch forming a target for a blood return access site so that said patch surrounds said central opening; terminating a primary circuit loop at two ends at a slit extending between said external boundary edge and said central opening, terminating an early warning alarm circuit loop at two ends at said slit, and terminating an emergency shut-down circuit loop at said two ends of said slit, wherein said primary circuit loop, said early warning alarm circuit loop and said emergency shut-down circuit loop are in a radial plane and each circumnavigate said central opening; adhesively securing said patch to a patient; sensing a status change in properties when blood closes said primary circuit loop and said early warning alarm circuit loop and thereafter activating an alarm; sensing a status change in properties when blood closes said primary circuit loop and said emergency shut-down circuit loop; and thereafter shutting down said dialysis machine and said pump wherein said early warning alarm circuit loop and said emergency shut-down circuit loop operate independently.
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Specification