30 results about "Blood withdrawal" patented technology

The port catheter may be configured to facilitate insertion of a blood drawing device or other vascular probe or instrument. The port catheter may include a bushing or wedge shaped to provide smooth access and advancement of a tube of a blood drawing device coupled to the port catheter, whether the tube passes through the proximal opening or the port of the port catheter. Such bushings may be particularly beneficial when the port of a port catheter is oriented at an angle toward the catheter. By incorporating such a bushing, a port catheter can better minimize kink or bending of a tube of a blood drawing device. The port catheter may also include catheter strain relief features to minimize kink or kink of a tube of a blood drawing device as it extends through the catheter.

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 disposable circuit for extracorporeal blood treatment comprising a filtration unit (2) and a blood circuit (6, 7) having a blood withdrawal line (6) and a blood return line (7) designed to be connected to the cardiovascular system of a patient, wherein the blood withdrawal line (6) and the blood return line (7) are provided with an arterial connector (40) and a venous connector (41) which are detachably connected to a vascular access device of the patient; at least one fluid line (15, 21, 25, 42; 42a) is connected to the blood circuit (6, 7) and the disposable circuit further comprises a first auxiliary connector (51, 53, 55, 57, 59) and a second auxiliary connector (50, 52, 54, 56, 58) which are arranged on the blood circuit (6, 7) or on the fluid line (15, 21, 25, 42; 42a) and are configured to be removably connected with the arterial connector (40) and the venous connector (41) in a recirculation configuration so as to define a closed circuit which allows fluid recirculation.

The invention relates to a blood line (10) comprising a blood withdrawal line (12) and a blood return line (14), the blood withdrawal line (12) comprising a first inlet line (120) comprising a first inlet (120A) configured to receive blood from a patient and a first outlet (120B) opening into a three-way connector (16), a second inlet line (122) comprising a second inlet (122A) configured to receive physiological saline and a second outlet (122B) opening into the three-way connector (16), the three-way connector (16) being connected to a main line (124) having an outlet (124B) configured to be connected to a dialyzer (1002), the blood withdrawal line (12) being provided with a single puncture / injection housing (126), the puncture / injection housing (126) being arranged on the main line (124).

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.

An apparatus for extracorporeal treatment of blood (1) comprising a filtration unit (2), a blood withdrawal line (6), a blood return line (7), an effluent fluid line (13), a pre and / or post-dilution fluid line (15, 25) connected to the blood withdrawal line, and a dialysis fluid line. Pumps (17, 18, 21, 22, 27) act on the fluid lines for regulating the flow of fluid. A control unit (10) is configured to periodically calculate a new value for the patient fluid removal rate to be imposed on an ultrafiltration actuator in order to keep a predefined patient fluid removal rate across a reference time interval irrespective of machine down times.

An apparatus (1) for extracorporeal blood treatment comprising a filtration unit (2) having a primary chamber (3) and a secondary chamber (4) separated by a semipermeable membrane (5), a blood circuit (17) comprising at least a blood withdrawal line (6) and a blood return line (7), a fluid circuit (32) comprising a fluid supply (50) for providing a sterile fluid, and at least one gas inlet (49) for allowing gas to enter the blood circuit (17). The apparatus further comprises a control unit configured to perform a blood restitution procedure to a patient to end the extracorporeal blood treatment before disconnection from the patient, said blood restitution procedure comprising the steps of infusing a predetermined amount of sterile fluid from the supply (50) into the blood circuit (17), and causing a predetermined amount of gas to enter the blood circuit (17) from the gas inlet (49).

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 provide a catheter assembly to open a fluid path for avoiding obstructions and opening a fluid path for blood collection or fluid delivery.SOLUTION: A catheter assembly to open a fluid path comprises: a catheter adapter comprising a proximal end, a distal end, and a lumen extending along a longitudinal axis therebetween; a catheter extending from the distal end of the catheter adapter; and a stationary base element configured to receive the catheter adapter such that movement of the catheter adapter relative to the stationary base element controls a position of a tip of the catheter.SELECTED DRAWING: Figure 6A

The invention relates to a device for treating an individual suffering from cardiac or circulatory arrest or from a stroke, comprising a blood withdrawal device (BE) that is applied to the individual (P), an analysis unit (BA) which is directly or indirectly connected to the blood withdrawal device for detecting a blood analysis result (BAE) providing at least one characteristic of the blood, directly or indirectly connected to a blood return device (BR) that is applied to the individual (P) and is designed to deliver a substance to the individual via the return device (BR).

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.

A disposable kit and an extracorporeal blood treatment device include a blood circuit including a filter unit, a blood draw line, a blood return line, and a blood pump section on the blood draw line or the blood return line and configured to be coupled to a blood pump of the extracorporeal blood treatment device, to promote blood flow in the blood circuit. The blood circuit also includes an infusion portion connected to the blood extraction line at a first site and to the return line at a second site. The blood circuit can be configured in a loop recirculation circuit that includes a filter unit, a blood pump section, a portion of a blood draw line, a portion of a blood return line, and a recirculation portion of an infusion line between a first site and a second site.

An extracorporeal blood circuit comprises a blood withdrawal line, a blood return line, one or more air separators, a dialysis supply line, a dialysis effluent line, one or more infusion lines, a flexible bag for enabling blood flow connected to the blood return line or to the blood withdrawal line, and a fluid conduit. The fluid conduit has a maximum width in a direction of fluid flow through the fluid conduit. The one or more deflection sections includes an entry section and an exit section. The width of the fluid conduit decreases along the direction of fluid flow through the entry section from the maximum width to a narrower width and the width of the fluid conduit increases along the direction of the fluid flow through the exit section from the narrower width to the maximum width.

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.

An integrated venous catheter can have a side port that facilitates blood withdrawal. The side port provides a separate fluid pathway for blood withdrawal and for infusion of fluid via an extension set. The side port can be configured to allow priming of the extension set while a blood sample is being collected. In this way, it is facilitated to collect a blood sample upon catheter insertion.

The invention relates to a device for treating an individual suffering from cardiac or circulatory arrest or from a stroke, comprising a blood withdrawal device (BE) that is applied to the individual (P), an analysis unit (BA) which is directly or indirectly connected to the blood withdrawal device for detecting a blood analysis result (BAE) providing at least one characteristic of the blood, directly or indirectly connected to a blood return device (BR) that is applied to the individual (P) and is designed to deliver a substance to the individual via the return device (BR).

An arterial catheter system may include a catheter assembly that may include a catheter hub and an arterial catheter. An arterial catheter system may include a needle assembly that may include a needle hub and an introducer needle. The arterial catheter system may include an extension tube coupled to the catheter assembly and a fluid pathway extending through the arterial catheter, the catheter hub, and the extension tube. A first fluid resistance within a portion of the fluid passage within the extension tube may be greater than a second fluid resistance within the fluid passage distal or proximal to the portion of the fluid passage. The extension tube may have a length L and an inner diameter D. The geometry factor Gf of the portion of the fluid pathway may be equal to L / D4 and may be selected to reduce hemolysis during blood drawing from the artery.

An apparatus (1) for extracorporeal blood treatment comprises a filtration unit (2) having a primary chamber (3) and a secondary chamber (4) separated by a semi-permeable membrane (5), a blood circuit (17) comprising at least a blood withdrawal line (6) and a blood return line (7), a fluid circuit (32) comprising a fluid supply source (50) for providing a sterile fluid, and at least one gas inlet (49) to allow gas to enter into the blood circuit (17). The apparatus further comprises a control unit configured to perform a blood restitution procedure towards the patient for ending an extracorporeal blood treatment and before disconnecting the patient, said blood restitution procedure comprising the steps of infusing a predetermined amount of sterile fluid from the supply source (50) into the blood circuit (17) and causing a predetermined amount of gas to enter into the blood circuit (17) from the gas inlet (49).

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.

An apparatus for extracorporeal treatment of blood (1) comprising a treatment unit, a blood withdrawal line, a blood return line, a preparation line and a spent dialysate line. A control unit (10) is configured to calculate values of a parameter relating to treatment effectiveness based on measures of the conductivity in the spent dialysate line. An upstream variation of the value of the characteristic (Cdin) is caused in the fresh treatment liquid with respect to a prescription baseline (Cdset) thereby causing a corresponding and timely delayed downstream variation of the same characteristic (Cdout) in the spent liquid flowing in the spent dialysate line (13). An amplitude (ΔCin) and / or a duration over time (ΔT) of the upstream variation are / is computed as a function of the flow rate (Qdial) of the fresh treatment liquid in a preparation line (19) or of the parameter correlated to the flow rate (Qdial).

An extracorporeal blood treatment apparatus comprises a blood treatment device (2), an extracorporeal blood circuit, a blood pump (8) configured to be coupled to a blood withdrawal line (6) of the extracorporeal blood circuit. A closed fluid line (10) is connected to an inlet port (4a) and to an outlet port (4b) of a fluid chamber (4) of the blood treatment device (2), wherein the closed fluid line (10) together with the fluid chamber (4) forms a recirculation loop. An evacuation line (15) departs from the closed fluid line (10). A warming device (13) and a recirculation pump (17) are coupled or configured to be coupled to the closed fluid line (10). At least one temperature sensor (22) is operative on the extracorporeal blood circuit and it is configured to sense a blood temperature (Tb). A control unit (25), connected to the warming device (13), to the recirculation pump (17) and to the temperature sensor (22), is configured to execute the following procedure: receiving from the temperature sensor (22) at least a signal correlated to the blood temperature (Tb); adjusting the blood temperature (Tb) by controlling at least one of the warming device (13) and the recirculation pump (17).

An apparatus for extracorporeal treatment of blood comprising a filtration unit, a blood withdrawal line, a blood return line, an effluent fluid line, a pre and / or post-dilution fluid line connected to the blood withdrawal line, and a dialysis fluid line. Pumps act on the fluid lines for regulating the flow of fluid. A control unit is configured to set initial values to one or more fluid flow rates through the above lines and to periodically execute a flow rate update procedure in order to deliver a set dose (Dset) in a reference time interval.

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.

To provide a vascular access device having a vented blood collection port.SOLUTION: The present invention is a vascular access device comprising a catheter assembly having a catheter extending distally therefrom, the catheter assembly having a side inlet, a side port having a distal end coupled to the catheter assembly via the side inlet, a proximal end, and a side branch to which an extension set is coupled, and a vented blood collection port formed at a proximal end of the side port.SELECTED DRAWING: Figure 1

Provided herein is a catheter system comprising a catheter and a catheter hub, the catheter hub further comprising: a hub body having a cavity formed therein extending between a hub distal end and a hub proximal end; a seat port at a proximal end of the seat; and a wedge within the cavity adjacent the distal end of the seat, the wedge coupled to the proximal end of the catheter. A connector is coupled to the catheter hub and includes a proximal link, a distal link configured to mate with the hub port, and a main lumen extending between the distal link and the proximal link and in fluid communication with the lumen of the catheter. The distal coupling includes a collar portion configured to mate with the seat port and an extended tip extending distally beyond the collar portion and into the cavity to the wedge of the catheter seat.

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.