The present disclosure relates to a pressure measuring line, with a connector to connect the pressure measuring line to a blood treatment apparatus, and to a membrane. In some embodiments, the pressure measuring line comprises at least two consecutive lumen sections, namely the first lumen section and the second lumen section. The first lumen section comprises a first lumen geometry and the second lumen section comprises a second lumen geometry, whereby the first lumen geometry and the second lumen geometry differ from each other in at least their diameters. Further, a monitoring method and devices are described.

A pressure pod for haemodialysis medical lines includes a hollow body with an intermediate flexible membrane which delimits a gas chamber and a liquid chamber with inlet and outlet tubular fittings for connection to the haemodialysis medical line. A female luer-lock connector has an outer tubular body and an inner tubular body on which the outer tubular body is axially blocked rotatably. A tubular fitting is engaged within an annular cavity formed between the inner and outer tubular bodies of the female connector.

A medical device includes a case obtained by mating a liquid-phase-portion case and a gas-phase-portion case to each other, a membrane member as an elastic member with which a liquid-phase portion covered by the liquid-phase-portion case and a gas-phase portion covered by the gas-phase-portion case are separated from each other, fixing parts and at which the liquid-phase-portion case and the gas-phase-portion case that are mated to each other are fixed to each other, holding surfaces and between which a peripheral edge of the membrane member is held, and a sealing part that seals the entirety of the peripheral edge of the membrane member held between the holding surfaces and. The medical device has a releasing part that releases the pressure in an air gap produced between the sealing part and the fixing parts.

A method of manufacturing a medical device. The medical device includes a case obtained by mating a first case portion and a second case portion to each other, the case having a housing space inside; an elastic membrane as an elastic member attached to the case and with which a first housing space covered by the first case portion and a second housing space covered by the second case portion are separated from each other; fixing parts provided at respective peripheries of the first case portion and the second case portion and at which the first case portion and the second case portion that are mated to each other are fixed to each other; holding surfaces provided at the respective peripheries of the first case portion and the second case portion and between which a peripheral edge of the elastic membrane is held; and a sealing part provided at the periphery of the first case portion or the second case portion on an inner side with respect to the fixing parts and that seals an entirety of the peripheral edge of the elastic membrane held between the holding surfaces. When fixing at the fixing parts and sealing by the sealing part are performed to assemble the first case portion and the second case portion together, an air gap produced between the sealing part and the fixing parts is depressurized or heated.

Dialyzer systems can consolidate multiple technologies and functionalities of blood treatment systems in a significantly integrated fashion. For example, this disclosure describes dialyzer systems that include a magnetically driven and magnetically levitating pump rotor integrated into the dialyzer. Such a dialyzer can be used with treatment modules that include a magnetic field-generating pump drive unit. In some embodiments, the dialyzers include pressure sensor chambers with flexible membranes with which corresponding pressure transducers of the treatment modules can interface to detect arterial and/or venous pressures.

A system for controlling the position of a diaphragm in a diaphragm-containing pressure pod, is provided. The system can include a peristaltic pump, a pressure pod having a flow-through fluid side and a gas side that are separated by a diaphragm, and a pressure sensor operatively connected to the gas side. The pressure sensor is configured to sense pulses of pressure resulting from movement of the diaphragm and caused by the action of the peristaltic pump. A gas source and a valve can be in fluid communication with the gas side of the pressure pod and can be configured to provide gas to, or vent gas from, the gas side. A controller receives pressure signals from the pressure sensor and controls the valve in response, and in so doing, controls the position of the diaphragm. Methods for positioning the diaphragm are also included.

A medical system includes a medical fluid pumping machine comprising a pressure sensor, a medical fluid line set comprising a fluid line in fluid communication with a fluid passage formed between a diaphragm and a base, the medical fluid line set being configured to be connected to the medical fluid pumping machine in a manner such that the diaphragm of the medical fluid line set aligns with the pressure sensor of the medical fluid pumping machine, and a member configured to apply a positive force to the pressure sensor when the medical fluid line set is connected to the medical fluid pumping machine and the fluid passage is at atmospheric pressure.

A pressure detector that includes a case connectable to a flow route for liquid, and a membrane member attached inside the case and with which a liquid-phase portion to be supplied with the liquid in the flow route and a gas-phase portion to be supplied with gas are separated from each other, the membrane member being displaceable in accordance with a pressure of the liquid supplied to the liquid-phase portion, the pressure detector detecting the pressure of the liquid in the flow route by detecting a pressure in the gas-phase portion. The pressure detector includes an inlet port including a connecting portion connectable to the flow route for the liquid, and a flow-route portion through which the liquid flows into an inlet opening of the liquid-phase portion; and an outlet port including a connecting portion connectable to the flow route for the liquid, and a flow-route portion through which the liquid having flowed into the liquid-phase portion is discharged from an outlet opening. At least one of the flow-route portion of the inlet port and the flow-route portion of the outlet port is configured such that an incoming direction or an outgoing direction of the liquid is inclined with respect to an attaching plane defined for the membrane member.

A pressure detector is provided that includes a case connectable to a flow route for liquid, and a membrane member attached inside the case and with which a liquid-phase portion to be supplied with the liquid in the flow route and a gas-phase portion to be supplied with gas are separated from each other, the membrane member being displaceable in accordance with a pressure of the liquid supplied to the liquid-phase portion, the pressure detector detecting the pressure of the liquid in the flow route by detecting a pressure in the gas-phase portion with a pressure detection sensor. The pressure detector includes a hydrophobic portion that allows gas to pass through but blocks liquid from passing through, the hydrophobic portion being provided between the gas-phase portion and the pressure detection sensor.

A pressure detector including a case connectable to a flow route and attachable to a predetermined attaching surface; and a membrane member attached inside the case and with which a liquid-phase portion to be supplied with the liquid in the flow route and a gas-phase portion to be supplied with gas are separated from each other, the membrane member being displaceable in accordance with a pressure of the liquid supplied to the liquid-phase portion, the pressure detector detecting the pressure of the liquid in the flow route by detecting a pressure in the gas-phase portion. The pressure detector includes an inlet port including a connecting portion connectable to the flow route, and a flow-route portion through which the liquid flows into an inlet opening of the liquid-phase portion; and an outlet port including a connecting portion connectable to the flow route, and a flow-route portion through which the liquid having flowed into the liquid-phase portion is discharged from an outlet opening. The outlet opening is positioned in a part of the liquid-phase portion that includes a highest point in a vertical direction in a state where the case is attached to the predetermined attaching surface, and the outlet port extends obliquely upward from the outlet opening.