Gambro Hospal (schweiz) Ag

Gambro Lundia Ab

Hospal Ag

Bellco S.r.l.

Gambro Hospal Ag

Renato Pedrazzi

Mauro Suffritti

Anna Puppini

Paolo Rovatti

Paolo Pirazzoli

Domenico Cianciavicchia

Mauro Aldrovandi

In a process for testing filters () and () of treatment fluid of a hemodiafiltration apparatus (), each filter has a wet semipermeable membrane () which separates a gas-filled first chamber (and) from a liquid-filled second chamber (and). The first chambers are pressurized by a pump () supplying air, while the second chambers are placed in depression by a drainage pump () of used dialysis fluid. A first closed system is formed which includes the first chambers and a second closed system is formed which includes the second chambers. Two pressure gauges (Pand P) monitor the pressure in the two closed systems for a predetermined time. The monitoring provides indications relating to the filter integrity.

Apparatus and process for testing filters

In a process for testing filters () and () of treatment fluid of a hemodiafiltration apparatus (), each filter has a wet semipermeable membrane () which separates a gas-filled first chamber (and) from a liquid-filled second chamber (and). The first chambers are pressurised by a pump () supplying air, while the second chambers are placed in depression by a drainage pump () of used dialysis fluid. A first closed system is formed which includes the first chambers and a second closed system is formed which includes the second chambers. Two pressure gauges (Pand P) monitor the pressure in the two closed systems for a predetermined time. The monitoring provides indications relating to the filter integrity.

A method for emptying a blood circuit of an apparatus for the extracorporeal treatment of blood after interrupting a treatment session. The apparatus has a blood treatment device with first and second compartments separated by a semi permeable membrane, an arterial pipe connected to an inlet of the first compartment, a venous pipe connected to an outlet of the first compartment and a second end, and a used liquid circuit having a drain pipe connected to an outlet of the second compartment. The method involves the closing of the blood circuit on itself. The blood circuit includes the arterial pipe, the first compartment of the blood treatment apparatus, and the venous pipe, in order to form a closed loop circuit after the arterial and venous pipes have been disconnected from the vascular system of the patient. The blood circuit contains a liquid, which is transferred from the closed loop circuit into the used liquid circuit. The liquid transferred into the used liquid circuit is then drained using the drain pipe.

Method for emptying a blood circuit of an apparatus for the extracorporeal treatment of blood

An infusion control device controls infusion of a liquid in an extracorporeal blood circuit having an arterial pipe connected to an inlet of a blood compartment of a filter and a venous pipe connected to an outlet of the blood compartment. The arterial pipe is also connected to a pre-dilution pipe of an infusion circuit, and the venous pipe is also connected to a post-dilution pipe of said infusion circuit. The infusion control device regulates and distributes an infusion flow rate in the arterial and venous pipes based on a monitoring of quantities that are directly correlated with the operating conditions of the filter.

Device and method for controlling infusion of a liquid in an extracorporeal blood circuit

A dialysis machine includes an extracorporeal blood circuit having an arterial pipe and a venous pipe respectively connected to an inlet and an outlet of a blood compartment of a filter. The blood compartment and a dialysis liquid compartment of the filter are separated by a semi-permeable membrane. The machine is configured to determine a sequence of infusion of a liquid in the extracorporeal blood circuit, from at least one characteristic value correlated with the concentration of the blood and/or a filtration efficiency of the filter, and to infuse the infusion solution in the arterial pipe and in the venous pipe in accordance with the determined infusion sequence.

Device and method for controlling infusion of liquid in an extracorporeal blood circuit

Apparatus for circulating a liquid along a tubular conduit comprises a peristaltic pump provided with a rotor which acts through the intermediary of rollers, on an elastically deformable tube disposed in series along the mentioned tubular conduit and a device mounted outside on a section of the deformable tube for emitting an electric signal depending on the deformation induced in operation in the section of tube by the pressure of the said pumped liquid.

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Mirandola, Italy

Renato Pedrazzi