12 results about "Blood withdrawal" patented technology

An extracorporeal blood treatment apparatus (100) comprises: a treatment unit (200); an extracorporeal blood circuit (300) comprising a blood withdrawal line (301) connected to the treatment unit (200) and connectable to a first access port (A) or a second access port (B) of a patient and a blood return line (302) connected to an outlet (202) of the treatment unit (200) and connectable to the second access port (B) or the first access port (A) of the patient; a switching valve (1) in fluid communication with the blood withdrawal line (301) and the blood return line (302) and with the first access port (A) and the second access port (B), which is switchable between: (i) a first switching condition, wherein the first access port (A) and the second access port (B) are respectively fluidly connected to the blood withdrawal line (301) and the blood return line (302) to trigger a normal mode of operation; (ii) a second switching condition, wherein the first access port (A) and the second access port (B) are respectively fluidly connected to the blood return line (302) and the blood withdrawal line (301) to trigger a reversing mode of operation wherein blood coming from the patient is circulated through the treatment unit (200) according to an opposite / reverse direction and returned to the patient; (iii) a third switching condition, wherein the first access port (A) and the second access port (B) are fluidly connected to each other and the blood withdrawal line (301) and the blood return line (302) are fluidly connected to each other to trigger a recirculation mode, wherein the extracorporeal blood circuit (300) is not in fluid communication with the first (A) and the second access port (B).

A blood collection device can include a syringe having hemolysis protection. The syringe with hemolysis protection can be coupled to a catheter assembly and used to draw blood. The blood collection device can include a syringe that can include a distal end and a flow restrictor. The flow restrictor can include a distal end and a proximal end. The proximal end of the flow restrictor can be coupled to the distal end of the syringe such that hemolysis can be protected against.

To improve the accuracy of impedance measurements in blood circuits. [Solution] The blood purification device includes a first electrode that contacts a blood withdrawal side blood circuit connected to the blood purifier, a second electrode that contacts a blood return side blood circuit connected to the blood purifier, and a measuring unit that measures the impedance between the first electrode and the second electrode. At least one of the first electrode and the second electrode includes an electrode unit 60. The electrode unit 60 includes a receiving section 62 on which a tube 58 provided in the blood withdrawal side blood circuit or the blood return side blood circuit is arranged. The receiving section 62 includes a contact surface 64 that contacts the outer surface of the tube 58, a deformable section 68 that makes the contact surface 64 deformable, and an electrode section 66 provided along the contact surface 64.

An apparatus for extracorporeal blood treatment comprising a filtration unit, a blood circuit comprising a blood withdrawal line and a blood return line, and a fluid circuit. The fluid circuit comprises at least one or more water inlet ducts for receiving water, a dialysis preparation assembly comprising one or more concentrated sources housing a respective concentrate solution and configured to prepare a mixed solution of a dialysis fluid, wherein the water inlet duct is configured to provide water to the dialysis preparation assembly for preparing said mixed solution of dialysis fluid. The fluid circuit further comprises an infusion preparation assembly comprising one or more concentrated sources housing a respective concentrate solution and configured to prepare a mixed solution of an infusion fluid, wherein the water inlet duct is configured to provide water to the infusion preparation assembly for preparing said mixed solution of infusion fluid.

When performing drainage in an AV connection type blood circuit, it is determined that the blood circuit is in an AV connection state. A blood purification device includes a blood circuit having a blood withdrawal side circuit and a blood return side circuit, one end of the blood withdrawal side circuit and one end of the blood return side circuit being connected to each other by a blood purifier, and the other end of the blood withdrawal side circuit and the other end of the blood return side circuit being connected to each other, whereby a closed circuit can be formed; a blood pump provided in the blood circuit; a flow path switching section capable of being switched between an open state in which a fluid can flow through one end of the blood withdrawal side circuit and one end of the blood return side circuit, and a closed state in which the fluid cannot flow; a pressure detection section for detecting an internal pressure of the blood circuit; and a control section that, when the blood circuit is in a state in which the closed circuit is formed, performs a drainage process of draining residual liquid in the blood circuit to a predetermined discharge location. The control section performs the following control: in the closed state, after a pressure difference is generated between the blood withdrawal side circuit and the blood return side circuit by rotation of the blood pump, the open state is switched to, and the pressure difference is monitored based on a detection result of the pressure detection section to determine whether the blood circuit is the closed circuit.

To improve the accuracy of impedance measurements in blood circuits. [Solution] The blood purification device includes a first electrode that contacts a blood withdrawal side blood circuit connected to a blood purifier, a second electrode that contacts a blood return side blood circuit connected to a blood purifier, and a measuring unit that measures the impedance between the first electrode and the second electrode. At least one of the first electrode and the second electrode includes an electrode unit 60. The electrode unit 60 includes a receiving section 62 on which a tube 58 provided in the blood withdrawal side blood circuit or the blood return side blood circuit is arranged. The receiving section 62 includes a contact surface 64 having a concave curved shape that contacts the outer surface of the tube 58, and an electrode section 66 provided along the contact surface 64.

This image is intended to show the predetermined pressures in the blood circuit through which the patient's blood circulates in a cardiopulmonary bypass machine. In the upper section, the pressures at points located from left to right on the blood withdrawal side (upstream) to the blood infusion side (downstream) of the circuit are displayed, and in the lower section, the differential pressure between each point is displayed. The differential pressure display in the lower section is positioned midway between the two point pressure displays in the upper section, allowing the user to visually confirm which points the differential pressure represents.

To reduce the volume of blood circulating extracorporeally while ensuring safety in blood purification therapy. [Solution] The device comprises an arterial clamp capable of opening and closing the blood flow path of the arterial blood circuit to which an arterial blood circuit can be attached, a venous clamp capable of opening and closing the blood flow path of the venous blood circuit to which a venous blood circuit can be attached, a pump capable of introducing or releasing air into a gas circuit, a processing unit that controls the pump, the arterial clamp, and the venous clamp and alternately performs a blood withdrawal process by introducing the gas into the branching point and a blood return process by releasing the gas from the branching point, and a pressure measuring unit provided only in the gas circuit among the arterial blood circuit, the venous blood circuit, and the gas circuit, or provided only in the branching point.

Extracorporeal blood treatment apparatus comprising a disposable set, the disposable set comprising: a blood circuit with a blood withdrawal line extending between a first end connected to the treatment unit and a second end, and with a blood return line extending between a first end connected to the treatment unit and a second end; a fluid infusion line with a pressure valve and extending between a first end connected to the blood circuit and a second end for connection to an infusion source, wherein the pressure valve is configured to switch from an interception position to a flow position when a differential pressure across the pressure valve exceeds an aperture pressure and from the flow position to the interception position when said differential pressure across the pressure valve falls below a closure pressure, and the closure pressure is below the aperture pressure; further wherein the apparatus comprises a blood pump, an infusion pump and a control unit configured to perform a pulsed infusion procedure.

A disposable set for an extracorporeal blood treatment apparatus, the disposable set comprising a treatment unit, a blood circuit with a blood withdrawal line extending between a first end connected to the treatment unit and a second end, and with a blood return line extending between a first end connected to the treatment unit and a second end; the set further comprises a fluid infusion line extending between a first end connected to the blood circuit and a second end for connection to an infusion source, and a degassing chamber on the blood return line; said degassing chamber comprising a blood inlet for blood entry; a blood outlet for blood output; and a fluid infusion inlet connected to the first end of the fluid infusion line; wherein said fluid infusion inlet is interposed between said blood inlet and said blood outlet.

To improve the accuracy of impedance measurements in blood circuits. [Solution] The blood purification device includes a first electrode that contacts a blood withdrawal side blood circuit connected to a blood purifier, a second electrode that contacts a blood return side blood circuit connected to a blood purifier, and a measuring unit that measures the impedance between the first electrode and the second electrode. At least one of the first electrode and the second electrode includes an electrode unit 60F. The electrode unit 60F includes a receiving section 62F on which a cuvette 80 provided in the blood withdrawal side blood circuit or the blood return side blood circuit is arranged. The receiving section 62F includes a contact surface 64F that contacts the outer surface of the cuvette 80, and an electrode section 66F provided along the contact surface 64F.

An extracorporeal blood treatment apparatus (1) has a filtration unit (2), a blood circuit (6), and a main infusion line (9) connected to a blood withdrawal line (6a) to infuse a solution into blood. A main infusion pump (11) causes the infusion solution I to flow from an infusion fluid source (10) to the blood withdrawal line, and an inactivated condition, wherein the main infusion pump (11) is inactive; a concentrate sensor (12) is placed on the blood withdrawal line between an injection point (9a) and the filtration unit (2) for monitoring the concentration of a substance. A control unit (13), in the first operating condition, activates the main infusion pump (11) and acquires the signal from the concentrate sensor (12) to determine the concentration of the substance into blood infused with the infusion solution, and, in the second operating condition, inactivates the main infusion pump (11) and acquires the signal to determine the concentration of the substance when no infusion solution I is infused into the blood.