A method for filling and venting a device for extracorporeal blood treatment is disclosed, such as a patient module in a heart-lung machine, without attached patient. A filling liquid from a filling liquid container located higher than the device flows by gravity via a venous side of the system into a reservoir and flows onwards into a blood pump located at the lower end of the reservoir, wherein a first controllable valve (HC1) for a venting line of a filter is opened and, after the response of an upper filling level sensor in the reservoir, is closed. An upper level of the filter is positioned higher than the upper filling level sensor, and a start-stop motion of the blood pump is performed, as a result of which a stepped flooding of the filter is made providing for an advantageous de-airing of the device.

A dialysis machine that includes a valve member having a deformable area configured to deform outwardly away when pressurized fluid is introduced into the valve member. The valve member is configured so that, when a dialysis fluid cassette is disposed in a cassette compartment of the dialysis machine and pressurized fluid is introduced into the valve member, the deformable area obstructs a fluid channel of the dialysis fluid cassette to control dialysis fluid flow therethrough.

The device of the present invention includes a dual chamber gas exchanger that is configured for increased flexibility and scalability for many clinical applications. The dual chamber oxygenator can be configured and used in various applications, such as in a heart-lung machine for cardiopulmonary support during cardiothoracic surgery, in an extracorporeal membrane oxygenation (ECMO) circuitry, as a respiratory assist device for patients with lung failure, and the like. The dual chamber gas exchanger features two sweep gas flow paths and two gas exchange membrane bundles enclosed in a housing structure with various blood flow distribution and gas distribution mechanisms. The gas exchanger includes an outer housing, an intermediate housing, two gas exchange fiber bundles, a blood inlet, a blood outlet, two gas inlets, two gas outlets, two gas distribution chambers and an optional heat exchanger.

The device of the present invention includes a dual chamber gas exchanger that is configured for increased flexibility and scalability for many clinical applications. The dual chamber oxygenator can be configured and used in various applications, such as in a heart-lung machine for cardiopulmonary support during cardiothoracic surgery, in an extracorporeal membrane oxygenation (ECMO) circuitry, as a respiratory assist device for patients with lung failure, and the like. The dual chamber gas exchanger features two sweep gas flow paths and two gas exchange membrane bundles enclosed in a housing structure with various blood flow distribution and gas distribution mechanisms. The gas exchanger includes an outer housing, an intermediate housing, two gas exchange fiber bundles, a blood inlet, a blood outlet, two gas inlets, two gas outlets, two gas distribution chambers and an optional heat exchanger.

A dual lumen coaxial cannula, assembly includes a first infusion tube having a first elongate body defining a first lumen therethrough and a second drainage tube co-axially aligned with the first infusion tube and having a second elongate body with a second lumen defined by a space between the first infusion tube and second drainage tube. A connector is removably attached to the first infusion tube and the second drainage tube for coupling the dual lumen coaxial cannula to an extracorporeal blood circuit. The first infusion tube and the second drainage tube include a plurality of infusion and drainage apertures, respectively, provided at the distal end and extending through the sidewall of the first infusion tube and the drainage tube, respectively.

Embodiments of pumps are described herein that may be used as peristaltic pumps. The pumps may include features that provide for quiet operation as well as automatically loading of tubing. Embodiments may be implemented in blood separation systems.

A processor of a medical device configured to communicate with a remote server can be programmed to protect the medical device from exposure to unauthorized or malicious software. A system or method to implement this form of protection can include, for example, at least one processor on the medical device, a control software module that controls the operation of the medical device and is executable on the processor, a data management module that manages data flow to and from the control software module from sources external to the medical device, and an agent module that has access to a limited number of designated memory locations in the medical device. In addition, a hemodialysis apparatus can be configured to operate in conjunction with an apparatus for providing purified water from a source such as a municipal water supply or a well. A system for controlling delivery of purified water to the hemodialysis apparatus can comprise a therapy controller of the hemodialysis apparatus configured to communicate with a controller of a water purification device, and a user interface controller of the hemodialysis apparatus configured to communicate with the therapy controller, and to send data to and receive data from a user interface.

A method of draining a device for extracorporeal blood treatment, wherein the device comprises a dialyzer which is divided by means of a membrane into a first chamber and a second chamber, an arterial line connected to a blood inlet of the first chamber, a venous line connected to a blood outlet of the first chamber, a dialysis fluid line for fresh dialysis fluid connected to a dialysis fluid inlet of the second chamber and a dialysis fluid line for used dialysis fluid connected to a dialysis fluid outlet of the second chamber, a blood pump disposed in the arterial line, a venous expansion chamber disposed in the venous line and an air detector unit downstream of the venous expansion chamber, and wherein the method comprises the following steps of: connecting a patient-side port of the arterial line to a patient-side port of the venous line; generating a negative pressure in the second chamber; operating the blood pump in a first direction and draining the arterial and venous lines in the first direction via the membrane and the second chamber; and stopping the blood pump and draining the arterial and venous lines in a second direction opposed to the first direction via the membrane and the second chamber.

So as to be able to determine the position of a functional element as precisely as possible during the invasive use of a blood pump in a patient's body without the use of imaging methods, the blood pump is connected to a main sensor which records signals of the patient's heart, which are compared to other electrophysiological heart signals recorded by several sensors distributed on the body surface so as to allow the position of the blood pump to be determined by way of linking.

The present invention relates to a method of determining a system compressibility value of a medical membrane pump drive, wherein a first and second pressure level are moved to and a first and second operating parameter value of the membrane pump drive are detected; wherein the system compressibility value is determined on the basis of the detected operating parameter values; and wherein the membrane of the membrane pump drive is supported at a rigid surface during the determination of the system compressibility value.