Fluid Distribution Module and Extracorporeal Blood Circuit Including Such a Module
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0 Petitions
Accused Products
Abstract
A fluid distribution module (1) for causing and monitoring the circulation of fluids from and to a patient through an extracorporeal blood treatment device, comprises a degassing device (11) connected to a connecting structure (10). The degassing device (11) comprises a first chamber (12) having a lower inlet (13) for a liquid and a second chamber (14) having an upper opening (79) closed by a hydrophobic membrane (78) and an outlet (15) for discharging the liquid. The connecting structure (10) has at least a first and a second conduits (20, 21) defined therein, wherein the first conduit (20) comprises a first end for connection to a discharge tube (7) from the treatment device and a second end connected to the inlet (13) of the first chamber (12) of the degassing device (11), and the second conduit (21) comprises a first end connected to the outlet (15) of the second chamber (14) of the degassing device (11) and a second end for connection to a blood return tube (6) to a patient.
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Citations
65 Claims
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1-28. -28. (canceled)
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29. A fluid distribution module for causing and monitoring the circulation of fluids from and to a patient through an extracorporeal blood treatment device, comprising:
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a degassing device comprising;
a first chamber having an inlet for a liquid; and
a second chamber having an opening closed by a hydrophobic membrane and an outlet for discharging the liquid, wherein the first chamber partially extends within the second chamber and communicates therewith by an upper passageway, and the second chamber comprises a upstream portion extending above the passageway and a downstream portion extending below the passageway; and
a connecting structure having at least a first and a second conduits defined therein, wherein;
the first conduit comprises a first end for connection to a discharge tube from the treatment device and a second end connected to the inlet of the first chamber of the degassing device, and the second conduit comprises a first end connected to the outlet of the second chamber of the degassing device and a second end for connection to a blood return tube to a patient. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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57. A fluid distribution module for causing and monitoring the circulation of fluids from and to a patient through an extracorporeal blood treatment device, comprising:
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a degassing device comprising;
a first chamber having an inlet for a liquid; and
a second chamber having an opening closed by a hydrophobic membrane and an outlet for discharging the liquid, wherein the first chamber partially extends within the second chamber and communicates therewith by an upper passageway, and the second chamber comprises a upstream portion extending above the passageway and a downstream portion extending below the passageway, and a connecting structure having at least a first, second, fourth and fifth conduits defined therein, wherein;
the first conduit comprises a first end for connection to a discharge tube from the treatment device and a second end connected to the inlet of the first chamber of the degassing device, the second conduit comprises a first end connected to the outlet of the second chamber of the degassing device and a second end for connection to a blood return tube to a patient, the fourth conduit comprises a first end for connection to a blood withdrawal tube from a patient and a second end for connection to a first end of a pump hose of a peristaltic pump, and the fifth conduit comprises a first end for connection to a second end of the pump hose of a peristaltic pump and a second end for connection to a supply tube to a blood treatment device, wherein the second end of the fourth conduit and the first end of the fifth conduit are so positioned that a pump hose connected thereto forms a loop that laterally extends within a plan from the connecting structure.
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58. A fluid distribution module for causing and monitoring the circulation of fluids from and to a patient through an extracorporeal blood treatment device, comprising:
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a degassing device comprising;
a first chamber having an inlet for a liquid; and
a second chamber having an opening closed by a hydrophobic membrane and an outlet for discharging the liquid, wherein the first chamber partially extends within the second chamber and communicates therewith by an upper passageway, and the first chamber has a downstream portion having a cross-section selected with respect to a maximal blood flow rate in an extracorporeal blood circuit connected to the degassing device so that a velocity of blood in the downstream portion of the first chamber is less than a predetermined velocity; and
a connecting structure having at least a first and a second conduits defined therein, wherein;
the first conduit comprises a first end for connection to a discharge tube from the treatment device and a second end connected to the inlet of the first chamber of the degassing device, and the second conduit comprises a first end connected to the outlet of the second chamber of the degassing device and a second end for connection to a blood return tube to a patient.
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59. A fluid distribution module for causing and monitoring the circulation of fluids from and to a patient through an extracorporeal blood treatment device, comprising:
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a degassing device comprising;
a first chamber having an inlet for a liquid; and
a second chamber having an opening closed by a hydrophobic membrane and an outlet for discharging the liquid, wherein the first chamber partially extends within the second chamber and communicates therewith by an upper passageway, and the cross-section of the second chamber of the degassing device at the level of the passageway is selected so that the ratio of a velocity of blood within a downstream portion of the first chamber to a velocity of blood within the second chamber at the level of the passageway is more than a determined value; and
a connecting structure having at least a first and a second conduits defined therein, wherein;
the first conduit comprises a first end for connection to a discharge tube from the treatment device and a second end connected to the inlet of the first chamber of the degassing device, and the second conduit comprises a first end connected to the outlet of the second chamber of the degassing device and a second end for connection to a blood return tube to a patient.
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60. A fluid distribution module for causing and monitoring the circulation of fluids from and to a patient through an extracorporeal blood treatment device, comprising:
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a degassing device comprising;
a first chamber having an inlet for a liquid; and
a second chamber having an opening closed by a hydrophobic membrane and an outlet for discharging the liquid, wherein the first chamber partially extends within the second chamber and communicates therewith by an upper passageway, the second chamber comprises a upstream portion extending above the passageway and a downstream portion extending below the passageway, and the downstream portion of the second chamber of the degassing device asymmetrically surrounds an upper part of the first chamber; and
a connecting structure having at least a first and a second conduits defined therein, wherein;
the first conduit comprises a first end for connection to a discharge tube from the treatment device and a second end connected to the inlet of the first chamber of the degassing device, and the second conduit comprises a first end connected to the outlet of the second chamber of the degassing device and a second end for connection to a blood return tube to a patient.
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61. A fluid distribution module for causing and monitoring the circulation of fluids from and to a patient through an extracorporeal blood treatment device, comprising:
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a degassing device comprising;
a first chamber having an inlet for a liquid; and
a second chamber having an opening closed by a hydrophobic membrane and an outlet for discharging the liquid, wherein the first chamber partially extends within the second chamber and communicates therewith by an upper passageway that has a lesser cross-section than a cross-section of the second chamber so that a flow of liquid from the first chamber into the second chamber decreases within the second chamber; and
a connecting structure having at least a first and a second conduits defined therein, wherein;
the first conduit comprises a first end for connection to a discharge tube from the treatment device and a second end connected to the inlet of the first chamber of the degassing device, and the second conduit comprises a first end connected to the outlet of the second chamber of the degassing device and a second end for connection to a blood return tube to a patient.
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62. A fluid distribution module for causing and monitoring the circulation of fluids from and to a patient through an extracorporeal blood treatment device, comprising:
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a degassing device comprising;
a first chamber having an inlet for a liquid; and
a second chamber having an opening closed by a hydrophobic membrane and an outlet for discharging the liquid, wherein the first chamber partially extends within the second chamber and communicates therewith by an upper passageway, and the first chamber, the second chamber and the passageway are arranged with respect to each other so that a flow pattern of a liquid flowing through the degassing device comprises a component that is tangential to the hydrophobic membrane; and
a connecting structure having at least a first and a second conduits defined therein, wherein;
the first conduit comprises a first end for connection to a discharge tube from the treatment device and a second end connected to the inlet of the first chamber of the degassing device, and the second conduit comprises a first end connected to the outlet of the second chamber of the degassing device and a second end for connection to a blood return tube to a patient.
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63. A fluid distribution module for causing and monitoring the circulation of fluids from and to a patient through an extracorporeal blood treatment device, comprising:
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a degassing device comprising;
a first chamber having an inlet for a liquid; and
a second chamber having an opening closed by a hydrophobic membrane and an outlet for discharging the liquid, wherein the first chamber partially extends within the second chamber and communicates therewith by an upper passageway, and the first chamber, the second chamber and the passageway are arranged with respect to each other so that a liquid flowing through the degassing device keeps gas bubbles in motion along an inner surface of the hydrophobic membrane; and
a connecting structure having at least a first and a second conduits defined therein, wherein;
the first conduit comprises a first end for connection to a discharge tube from the treatment device and a second end connected to the inlet of the first chamber of the degassing device, and the second conduit comprises a first end connected to the outlet of the second chamber of the degassing device and a second end for connection to a blood return tube to a patient.
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64. A fluid distribution module for causing and monitoring the circulation of fluids from and to a patient through an extracorporeal blood treatment device, comprising:
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a degassing device comprising;
a first chamber having an inlet for a liquid; and
a second chamber having an opening closed by a hydrophobic membrane and an outlet for discharging the liquid, wherein the first chamber partially extends within the second chamber and communicates therewith by an upper passageway, the second chamber comprises a upstream portion extending above the passageway and a downstream portion extending below the passageway, and the downstream portion of second chamber forms an overflow for a liquid flowing from the first chamber into the second chamber; and
a connecting structure having at least a first and a second conduits defined therein, wherein;
the first conduit comprises a first end for connection to a discharge tube from the treatment device and a second end connected to the inlet of the first chamber of the degassing device, and the second conduit comprises a first end connected to the outlet of the second chamber of the degassing device and a second end for connection to a blood return tube to a patient.
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65. A fluid distribution module for causing and monitoring the circulation of fluids from and to a patient through an extracorporeal blood treatment device, comprising:
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a degassing device comprising;
a first chamber having an inlet for a liquid; and
a second chamber having an opening closed by a hydrophobic membrane and an outlet for discharging the liquid, wherein the first chamber partially extends within the second chamber and communicates therewith by an upper passageway, the second chamber comprises a upstream portion extending above the passageway and a downstream portion extending below the passageway, and the upstream portion of the second chamber has a decreasing cross-section, with a larger cross-section that is substantially level with the passageway and a smaller cross-section that is substantially level with the hydrophobic membrane; and
a connecting structure having at least a first and a second conduits defined therein, wherein;
the first conduit comprises a first end for connection to a discharge tube from the treatment device and a second end connected to the inlet of the first chamber of the degassing device, and the second conduit comprises a first end connected to the outlet of the second chamber of the degassing device and a second end for connection to a blood return tube to a patient.
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Specification