Systems, devices, and methods are provided for sensing gas bubbles within a liquid flow line, such as within a medical device. The systems, devices, and methods can measure a change in capacitance across a pair of conductive plates to calculate a volume of gas in a flow line. If a calculated volume of gas exceeds an established threshold, an alert can be sent and/or changes made to operation of the device.

A system and method for producing fluid for peritoneal dialysis (PD) is disclosed. The system comprises a fluid path including one or more PD-concentrate connectors each connected to one or more sources of PD-concentrate fluid, and a water connector connected to a source of water. The system further includes a forward osmosis FO-unit including a draw side and a feed side separated by a FO-membrane. The FO-unit is fluidly connected to the fluid path. The FO-unit receives the one or more PD-concentrate fluids at the draw side, and receives the water at the feed side. Purified water is transported to one or more PD-concentrate fluids through the FO-membrane by means of an osmotic pressure gradient between the draw side and the feed side. The transported purified water is further purified by the FO-membrane and the one or more PD-concentrate fluids is diluted to produce a diluted PD-concentrate fluid.

A gravity fed peritoneal dialysis (“PD”) machine includes: a frame configured to be set on a supporting surface; at least one load cell; a scale platform supported by the frame via the at least one load cell positioned between the frame and the scale platform; a drain container support in mechanical communication with and extending downwardly from the scale platform, the machine configured such that when the frame is set on the supporting surface, at least one fresh PD fluid supply container is supportable by the scale platform above the at least one load cell and at least one used PD fluid drain container is supportable by the drain container support below the at least one load cell, so that a combined weight of fresh PD fluid and used PD fluid may be sensed by the at least one load cell.

In some examples, a system includes a glucose sensor configured to generate a signal indicative of a blood glucose level of a patient, a medical device configured to deliver insulin to the patient, a peritoneal dialysis (PD) device, and control circuitry. The control circuitry is configured to control the PD device to deliver PD therapy to a patient during a PD cycle, determine a blood glucose level of the patient during the PD cycle based on a signal from the glucose sensor, determine that the blood glucose level is greater than or equal to a predetermined blood glucose level threshold, and control the medical device to deliver insulin to the patient in response to determining the blood glucose level is greater than or equal to the predetermined blood glucose level threshold.

Damping devices, including damping devices for automated peritoneal dialysis (APD) systems, and associated systems, devices, and methods are disclosed herein. In one embodiment, a damping device includes a body portion, a first membrane, and a second membrane. The body portion can include a first side, a second side opposite the first side, an inlet, and a cavity fluidly coupled to the inlet. The cavity can be defined at least in part by a lumen in the body portion extending from the first side to the second side. The first membrane can be affixed to the first side of the body portion such that the first membrane hermetically seals the cavity at the first side. The second membrane can be affixed to the second side of the body portion such that the second membrane hermetically seals the cavity at the second side.

A peritoneal dialysis cassette and an interface between the cassette and a peritoneal dialysis system is provided. The peritoneal dialysis cassette can include one or more fluid passages connecting a plurality of inlet/outlet ports, with one or more linear actuators usable to selectively direct fluid through the peritoneal dialysis cassette.

A medical treatment system, such as a peritoneal dialysis system, may include a control system and other features to enhance patient comfort and ease of use. For example, the peritoneal dialysis system may include the control system that can adjust a volume of fluid infused into a peritoneal cavity to prevent an intraperitoneal fluid volume from exceeding a pre-determined amount. The control system can adjust by adding one or more therapy cycles, allowing for fill volumes during each cycle of the one or more therapy cycles to be reduced. The control system may continue to allow the fluid to drain from the peritoneal cavity as completely as possible before starting the next therapy cycle of the one or more therapy cycles. The control system may also adjust a dwell time of the fluid within the peritoneal cavity during the one or more therapy cycles in order to complete a therapy within a scheduled time period. A cycler may also be configured to have a heater control system that monitors both a temperature of a heating tray and a temperature of a bag of dialysis fluid in order to bring a temperature of the dialysis fluid rapidly to a specified temperature, with minimal temperature overshoot.

A method of performing a dialysis treatment includes using a pump and a dialysate supply line to transport peritoneal dialysis fluid, the supply line having a proximal end into which peritoneal dialysis fluid is supplied and from which spend dialysate is withdrawn, and a distal end which is connected to a patient's peritoneal access. The method further includes generating proximal and distal pressure signals using pressure detectors located at both the proximal and distal ends, respectively, of said supply line. During a drain cycle in which spent dialysate is pumped from the patient, the method includes, responsively to the proximal and distal pressure signals, detecting a characteristic of a pressure difference between the distal and proximal ends whose magnitude is determined by a predicted change in dialysate properties, and responsively to the characteristic, generating a signal indicating the change in dialysate properties.

A medical system, device, and methods are provided having programming to communicate with a mobile device; the medical device further having programming to authenticate the mobile device; the medical device granting access to one or more functions if the mobile device is authenticated.

Enhanced systems and methods for performing Direct Sodium Removal (DSR) therapy are provided in which an implantable device includes a variable speed motor-driven pump that may be programmed to output different flow rates at different stages of a DSR therapy session, wherein the system monitors operational parameters of the pump and is configured to generate an alarm condition indicative of a fault that may be displayed on a patient's smartphone to permit corrective action, and in which a catheter set implanted with the implantable device enables a DSR solution may be instilled into the patient's peritoneal cavity using a peritoneal catheter that is subsequently used to remove the DSR solution and sodium-rich ultrafiltrate from the peritoneal cavity to the patient's bladder.