33results about "Reciprocating system" patented technology

The invention provides a single-needle hemodialysis blood pipeline device which comprises a piston type container, a liftable piston plate is connected to the interior of the piston type container through a first elastic piece, an artery pot and a vein pot are arranged on one side of the piston type container and communicate with each other through a three-way pipeline, one end of the first pipeline communicates with the artery pot through a first valve, and the other end of the first pipeline communicates with the vein pot through a second valve. The blood pump is communicated with a dialyzer, one end of the dialyzer is communicated with a pipeline II, and the pipeline II is communicated with the vein pot through a valve II; the pipeline III is communicated with the pipeline I and the piston type container and is provided with a valve III; the fourth pipeline is communicated with the second pipeline and the piston type container and provided with a fourth valve, and the piston type container is further provided with a switching mechanism. According to the device, blood can be fully dialyzed only through single-needle puncture, it is ensured that the blood in the dialyzer makes full contact with the dialyzer, the toxin removing efficiency is improved, and finally full dialysis in a special scene is achieved.

An extracorporeal and drug delivery system includes a renal failure therapy machine operable with a blood filter in fluid communication with an arterial line and a venous line, the machine including an effluent pump for pumping effluent from the blood filter, and at least one of a dialysis fluid pump for pumping dialysis fluid to the blood filter at a dialysis fluid flowrate, a predilution pump for pumping replacement fluid into the arterial line at a predilution flowrate, or a postdilution pump for pumping replacement fluid into the venous line at a postdilution flowrate; an infusion pump operable to deliver an intravenous (“IV”) drug to the patient; and a coordinating logic implementor configured to determine if a formulation adjustment should be made to the IV drug when a constituent of the IV drug exists in the dialysis fluid, the predilution replacement fluid, and / or the postdilution replacement fluid.

Dialysis systems are disclosed comprising new fluid flow circuits. Systems may include blood and dialysate flow paths, where the dialysate flow path includes balancing, mixing, and / or directing circuits. Dialysate preparation may be decoupled from patient dialysis. Circuits may be defined within one or more cassettes. The fluid circuit fluid flow paths may be isolated from electrical components. A gas supply in fluid communication with the dialysate flow path and / or the dialyzer able to urge dialysate through the dialyzer and urge blood back to the patient may be included for certain emergency situations. Fluid handling devices, such as pumps, valves, and mixers that can be actuated using a control fluid may be included. Control fluid may be delivered by an external pump or other device, which may be detachable and / or generally rigid, optionally with a diaphragm dividing the device into first and second compartments.

Described are embodiments that include methods and devices for separating components from multi-component fluids. Embodiments may involve use of separation vessels and movement of components into and out of separation vessels through ports. Embodiments may involve the separation of plasma from whole blood. Also described are embodiments that include methods and devices for positioning portions, e.g., loops, of disposables in medical devices. Embodiments may involve use of surfaces for automatically guiding loops to position them into a predetermined position.

To control pressure fluctuation in an extracorporeal circulation part while reducing an extracorporeal circulation blood amount.SOLUTION: An arterial clamp capable of opening and closing the arterial blood circuit, a venous clamp capable of opening and closing the venous blood circuit, a pump capable of introducing or discharging air into or from the gas circuit, and a processing unit configured to control the pump, the arterial clamp, and the venous clamp, and a clamp control unit configured to perform control such that the flow path of the arterial blood circuit is opened by the arterial clamp and the flow path of the venous blood circuit is closed by the venous clamp during the blood removal treatment, and the flow path of the arterial blood circuit is closed by the arterial clamp and the flow path of the venous blood circuit is opened by the venous clamp during the blood returning treatment.SELECTED DRAWING: Figure 3

A flow path (42) is formed in a cassette body (40) of a blood component collection cassette (28). The cassette body (40) includes a bulging structure (50) in which at least a portion of the flow path is formed. A first gripped member (60), which is configured to be gripped by a first gripping member (78) provided on a centrifugal separation device (14), is disposed on one surface of the bulging structure (50) in a thickness direction thereof. A second gripped member (62), which is configured to be gripped by a second gripping member (80) to which a load detection unit (82) that is provided on the centrifugal separation device (14) is fixed, is disposed on another surface of the bulging structure (50) in the thickness direction thereof.

The present invention relates to a method for temporarily interrupting an extracorporeal treatment of blood of a patient by use of a blood treatment apparatus. The method comprises activating or controlling a control device provided and configured to bring the blood treatment apparatus into a state in which the blood treatment session of the patient can be interrupted with the intention to continue the blood treatment session. The present invention further relates to a control device, a blood treatment apparatus, a digital storage means, a computer program product as well as a computer program.

A blood component collection system (10) includes a first internal pressure calculation unit (110) adapted to calculate a first internal pressure of a first pressed portion (60) using first calibration curve data (118), a second internal pressure calculation unit (112) adapted to calculate a second internal pressure of a second pressed portion (62) using second calibration curve data (120), and a correction unit (114) adapted to correct the first calibration curve data (118) in a manner so that the first internal pressure becomes equal to the second internal pressure in a state in which operation of a collection and returning pump (100) is stopped during at least one of a collection operation and a returning operation of a first cycle.

Provided is a blood component collection cassette capable of measuring a circuit internal pressure using a simple and economical configuration. A blood component collection cassette (28) includes an inflow line for sending blood or a blood component collected from a donor to a centrifugal separator (14), a return line for returning a predetermined blood component to the donor, and a line forming member forming one of the inflow line and the return line and having a load detection soft portion made of a soft material.

Provided is a blood component collection cassette, a blood component collection kit, a blood component collection system, and a flow path internal pressure detection method capable of accurately measuring a circuit internal pressure in negative pressure and positive pressure regions. A flow path (42) formed in a cassette body (40) of a blood component collection cassette (28) has a first line (42a) through which blood flows when a blood component separation device is in operation, and a second line (42b) through which blood does not flow when the blood component separation device is in operation. A first line forming member (54) is provided with a first pressure-receiving portion (60) pressed by a first load detector (88) attached to the blood component separation device. A second line forming member (56) is provided with a second pressure-receiving portion (62) pressed by a second load detector (90) attached to the blood component separation device.

To enable detection of blood clots in an extracorporeal blood circulation, a device for detecting blood clots in an extracorporeal blood circulation is proposed, the device optionally comprising an actuator which can create an adjustable constriction on the extracorporeal blood circulation in that it reduces the cross section of a section of a blood line, at least one sensor, which requires at least one parameter related to a property of the liquid in the extracorporeal blood circulation, and a control unit, which is configured such that a measurement signal from the at least one sensor is evaluated, and, that on the basis of this evaluation of the parameter measured by the sensor, the passage of a blood clot through the constriction and / or the sticking of a blood clot in the constriction can be detected.

The present technology relates to systems and methods for removing a thrombus from a blood vessel of a patient. In some embodiments, the present technology is directed to systems including an elongated catheter having a distal portion configured to be positioned within the blood vessel of the patient, a proximal portion configured to be external to the patient, and a lumen extending therebetween. The system can also include a fluid delivery mechanism coupled with a fluid lumen and configured to apply fluid to at least partially fragment the thrombus.

The invention relates to devices, systems, and methods for calculating a bicarbonate concentration in a fluid used in dialysis. The devices, systems, and methods can be used to calculate the bicarbonate concentration in either dialysate or blood. The invention measures the amount of carbon dioxide in both an acidified and non-acidified solution and calculates the bicarbonate concentration based on the difference in carbon dioxide concentrations.

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.

The present invention comprises an artery clamp that is capable of opening and closing an artery-side blood circuit, a vein clamp that is capable of opening and closing a vein-side blood circuit, a pump that is capable of introducing or discharging air into or from a gas circuit, and a processing unit that controls the pump, the artery clamp, and the vein clamp, wherein the processing unit comprises: a pump control unit that controls the rotation direction of the pump to alternately perform introduction of gas into a branch part and discharge of gas from the branch part and thereby alternately perform a blood removal process and a blood return process on a patient; and a clamp control unit that performs control such that, during the blood removal process, a flow path of the vein-side blood circuit is closed by the vein clamp while a flow path of the artery-side blood circuit is opened by the artery clamp, and, during the blood return process, the flow path of the vein-side blood circuit is opened by the vein clamp while the flow path of the artery-side blood circuit is closed by the artery clamp.

A method is provided for controlling fluid flow through a tubing segment is provided in which a pump draws fluid through the tubing segment using negative pressure P. The method includes the steps of: a) operating the pump at an initial commanded fluid flow rate to draw fluid through the tubing segment; b) measuring on a continuous basis the P in the tubing segment; c) determining into which of four zones the measured P falls, a first zone being where P > X1, a second zone being where X1 > P > X2, a third zone where X2 > P > X3, and a fourth zone where X3 > P; d) if P is in the first zone for greater than a first pre-established time period, then increasing the commanded flow rate of the pump and returning to step b); e) if P is in the second zone, then continuing to operate the pump at the flow rate at which the pump is currently operated and returning to step b); f) if P is in the third zone, for greater than a second pre-established time period, then decreasing the commanded flow rate of the pump and returning to step b); and g) if P is in the fourth zone, then commanding the pump to stop. A system including a programmable controller configured to automatically perform the method is also disclosed

Described are embodiments that include methods and devices for separating components from multi-component fluids. Embodiments may involve use of separation vessels and movement of components into and out of separation vessels through ports. Embodiments may involve the separation of plasma from whole blood. Also described are embodiments that include methods and devices for positioning portions, e.g., loops, of disposables in medical devices. Embodiments may involve use of surfaces for automatically guiding loops to position them into a predetermined position.

To control pressure fluctuation in an extracorporeal circulation part while reducing an extracorporeal circulation blood amount.SOLUTION: An arterial clamp capable of opening and closing the arterial blood circuit, a venous clamp capable of opening and closing the venous blood circuit, a pump capable of introducing or discharging air into or from the gas circuit, and a processing unit configured to control the pump, the arterial clamp, and the venous clamp, and a clamp control unit configured to perform control such that the flow path of the arterial blood circuit is opened by the arterial clamp and the flow path of the venous blood circuit is closed by the venous clamp during the blood removal treatment, and the flow path of the arterial blood circuit is closed by the arterial clamp and the flow path of the venous blood circuit is opened by the venous clamp during the blood returning treatment.SELECTED DRAWING: Figure 3

The present subject matter relates to systems and methods for syringe-free blood return in a dialysis machine blood circuit. A three-way connector can include a first inlet configured to be connected to a patient arterial access line, a second inlet connected to a substitution fluid line, and an outlet connected to a machine arterial line. In this arrangement, the three-way connector is configured to selectively allow a flow of substitution fluid from the substitution line into the machine arterial line and / or into the patient arterial access line without changing the connections of tubing within the circuit.

An improved method and device for improved catheters and / or related technologies. The device generally comprises an improved medical technology. The provided device substantially improves upon catheter-related medical device technology.

A method is provided for controlling fluid flow through a tubing segment is provided in which a pump draws fluid through the tubing segment using negative pressure P. The method includes the steps of: a) operating the pump at an initial commanded fluid flow rate to draw fluid through the tubing segment; b) measuring on a continuous basis the P in the tubing segment; c) determining into which of four zones the measured P falls, a first zone being where P>X1, a second zone being where X1>P>X2, a third zone where X2>P>X3, and a fourth zone where X3>P; d) if P is in the first zone for greater than a first pre-established time period, then increasing the commanded flow rate of the pump and returning to step b); e) if P is in the second zone, then continuing to operate the pump at the flow rate at which the pump is currently operated and returning to step b); f) if P is in the third zone, for greater than a second pre-established time period, then decreasing the commanded flow rate of the pump and returning to step b); and g) if P is in the fourth zone, then commanding the pump to stop. A system including a programmable controller configured to automatically perform the method is also disclosed.

The disclosure provides a manual blood or body fluid treatment system comprising first and second reservoirs for holding a batch of blood from a patient and a filter for performing an extracorporeal treatment on blood passing therethrough by removing waste molecules and / or fluid. The first reservoir is constructed to be displaced vertically relative to the second reservoir and vice versa, such that a height difference between the first and second reservoirs causes blood or body fluid to flow between the reservoirs due to gravity.

An improved method and device for improved catheters and / or related technologies. The device generally comprises an improved medical technology. The provided device substantially improves upon catheter-related medical device technology.

To make the blood collection process more efficient and faster for donors. [Solution] Embodiments are described that include a device for separating components from blood. Embodiments include the separation of plasma from whole blood. Embodiments are also described that include a method and device for positioning a part of a disposable item, such as loops, within a medical device. Embodiments include the use of a surface for automatically guiding the loops to position them in a predetermined position.

To provide improved methods and apparatus for improved catheters and / or related technologies. [Solution] An alternating flow catheter 20 is shown, comprising an outer catheter 30, an inner catheter 40, a catheter cap 50, and one or more balloons 60. The outer catheter 30 further has one or more distal axial holes 32, one or more proximal holes 34, a fixed area 36, ​​and a check valve 38. The inner catheter 40 further has one or more distal axial holes, one or more proximal holes 44, and an alternating flow control mechanism.

The present invention pertains to a tube set configured to be suitable both for single-needle and dual-needle hemodialysis. The tube set comprises an extracorporeal circuit comprising an arterial line configured to convey blood from a patient to a blood pump of a blood treatment device, and a venous line configured to convey blood from the blood pump to the patient, wherein the arterial line and the venous line each comprise a line connector configured to removably fluidically couple the arterial line and the venous line to an expansion chamber that is removably cou-pleable to the extracorporeal circuit. The removable expansion chamber allows the same tube set to be used for single-needle and dual-needle (conventional) hemodialysis.

This invention provides an indwelling needle and medical device management system that shortens dialysis time and improves patient convenience in dialysis using a single-needle type indwelling needle. [Solution] The indwelling needle 100 has a needle portion 200 having a hollow cross-section channel (needle channel portion) and a partition plate 300 inserted into the inside of the channel (needle channel portion) of the needle portion. The needle portion has a needle body 210 provided on the front side and inserted into the blood vessel, and a needle base portion (needle bottom portion 220) provided on the rear side of the needle body 210. The partition plate is inserted in place of the puncture needle after the needle portion has been punctured into the blood vessel together with the puncture needle 900, thereby dividing the hollow cross-section channel (needle channel portion) of the needle portion into a channel for the blood withdrawal portion 250 and a channel for the blood return portion.