1
Wilfried Schael: Blood flow monitoring and control apparatus. Dr Eduard Fresenius Chemisch Pharmazeutische Industrie KG Apparatebau KG, W G Fasse, W W Roberts, November 4, 1980: US04231366 (111 worldwide citation)

The present blood flow monitoring and control apparatus is especially use in connection with the so-called single needle technique, for example, for treatments such as dialysis, perfusion, or diafiltration. The blood pressure control is accomplished by a measuring chamber including a pressure equali ...


2
Wilfried Schael: Hemodialysis apparatus with degassing means for the dialysis solution. Fresenius Aktiengesellschaft, W G Fasse, D H Kane Jr, September 13, 1988: US04770769 (101 worldwide citation)

The ultra-filtration in a hemodialysis operation is controlled by a control apparatus which is connected to a balancing device (1) and to a dosing device (9) to form a closed loop control circuit for the metered supply of dialysis concentrate into the balancing device and for the metered supply of f ...


3
Johannes G Schindler, Wilfried Schael: Catheter device and system for continuous chemical analysis of body fluids in vivo. Dr E Fresenius Chemisch pharmazeutisch Industrie KG, Omri M Behr, Martin Sachs, May 5, 1981: US04265249 (94 worldwide citation)

A system for obtaining body fluids for continuous chemical analysis thereof includes a catheter for obtaining the material to be measured. The surface of the catheter is partially coated with a semi-permeable filter membrane. From the rear side of the filter membrane a plurality of channels are prov ...


4
Wilfried Schael: Peritoneal dialysis apparatus. Dr Eduard Fresenius Chemisch pharmazeutische Industrie KG Apparatebau KG, W G Fasse, D F Gould, December 23, 1980: US04240408 (94 worldwide citation)

In peritoneal dialysis apparatus, flushing liquid is pumped into a supply vessel (4) which is then emptied into the body cavity through a valve (5) and a catheter (6). The supply vessel is then refilled while the cavity is drained back through the catheter into a receptacle (11) of the same weight a ...


5
Johannes G Schindler, Wilfried Schael: Portable artificial kidney. Dr E Fresenius Chemisch Pharmazeutische Industrie KG, Omri M Behr, Martin Sachs, November 25, 1980: US04235231 (64 worldwide citation)

A portable artificial kidney designed for continuous use includes a catheter with filter properties. The body portion of the catheter has an infusion duct which opens into the surface of the catheter and is provided with surface channels which are covered by a semi-permeable membrane. Ducts are prov ...


6
Wilfried Schael: Apparatus for fluid balancing under sterile conditions. Dr Eduard Fresenius Chemisch pharmazeutische Industrie KG Apparatebau KG, W G Fasse, D F Gould, June 30, 1981: US04275726 (62 worldwide citation)

Apparatus for removing fluid from and supplying fluid to the human body in substantially equal quantities includes a double tube pump (1), a measuring chamber (2), and a supply container (4), the pump being arranged to deliver fluid from the supply container to the body by a line (13) while removing ...


7
Wilfried Schael: Apparatus for periodically rinsing body cavities, particularly the abdominal cavity. Dr Eduard Fresenius Chemisch pharmazeutische Industrie KG Apparatebau KG, W G Fasse, D F Gould, February 24, 1981: US04252115 (30 worldwide citation)

Apparatus for rinsing body cavities includes a double tube pump (1) for simultaneously pumping fluid into a storage vessel (4) for subsequent feed through a catheter (K) and pumping discharged fluid from a measuring vessel (9) at the same rate, so that surplus fluid with the discharge can be measure ...


8
Horst Ewert, Wilfried Schael: Indicator and limit value alarm device. Dr Eduard Fresenius Chemisch pharmazeutische Industrie KG Apparatebau KG, W G Fasse, D F Gould, February 17, 1981: US04251769 (27 worldwide citation)

The present electronic indicator or display device is equipped with adjustable upper and/or lower limit value markers to provide a respective alarm if such limit values are exceeded or not reached. The display itself comprises an electronic circuit and optical display elements such as light emitting ...


9
Wilfried Schael, Jan Erik Sigdell, Gerd E Krick: Apparatus for the mass transfer between two media. Dr Eduard Fresenius Chemisch Pharmazeutische Industrie KG Apparatebau KG, W G Fasse, D F Gould, February 27, 1979: US04141835 (27 worldwide citation)

The present mass transfer apparatus between two media is especially adapted to blood dialysis. To assure an undisturbed flow of the blood through the dialyser and to avoid coagulation all flow channels are shaped to avoid dead corners and choking zones so that the blood is prevented from forming wak ...


10
Johannes G Schindler, Wilfried Schael: Electrode having membrane with ion selective properties. Dr E Fresenius Chemisch Pharmazeutische Industrie KG Apparatebau KG, Omri M Behr, Martin Sachs, December 2, 1980: US04236987 (17 worldwide citation)

There is provided a novel type of ion selective membrane comprising a non-ion selective carrier, and an ion selective active phase molecule having a hydrophilic segment and a lipophilic periphery. In the preferred embodiment said molecule is a siloxane molecule whose Si-O-Groups are open chain, bran ...