Gambro Lundia Ab

Anna Puppini

Mauro Suffritti

Massimo Fava

Renato Pedrazzi

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

An apparatus () for extracorporeal blood treatment comprising a blood treatment device () having a semipermeable membrane () which separates a blood chamber () from a fluid chamber (). A used fluid line () connects the fluid chamber to a used fluid discharge. A first pump () controls the ultrafiltration through the semipermeable membrane. A second pump () arranged in the used fluid line downstream of the first pump keeps pressure between the first and the second pump at a constant predetermined value. The invention provides a protection system against any possible pressure change in the used fluid discharge in a hemodialysis or hemo(dia)filtration apparatus.

Apparatus for extracorporeal blood treatment

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.

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Mirandola, Italy

Anna Puppini