초록 ▼

A dialyser has a membrane assembly (12) comprising two superposed conduits partially defined, and separated, by a transfer membrane wall. The walls of the conduit are provided with furrowing (38 or 39) extending with a component along the conduits. Blood is pumped through one conduit by a roller pum

A dialyser has a membrane assembly (12) comprising two superposed conduits partially defined, and separated, by a transfer membrane wall. The walls of the conduit are provided with furrowing (38 or 39) extending with a component along the conduits. Blood is pumped through one conduit by a roller pump (21) and dialysate is pumped in counter current through the other conduit by a roller pump (24). The conduits communicate with separate chambers in flexible bladders (16) along each side edge of the conduits and the bladders are alternately compressed by rollers (27) to provide a superimposed reciprocatory flow component on the blood and dialysate in a direction transverse to the length of the conduits. This reciprocatory flow component, in conjunction with the furrows, produces vortexes in, and good mixing of, the blood and dialysate in their respective conduits and hence enhanced contact of each of these liquids with the transfer membrane wall.

대표청구항 ▼

Apparatus for effecting transfer of heat or mass between two fluids through a transfer membrane, comprising a first conduit having generally opposite edges for the flow of a first one of the fluids and defined between two predomiantly planar surfaces of which at least one is provided by the membrane

Apparatus for effecting transfer of heat or mass between two fluids through a transfer membrane, comprising a first conduit having generally opposite edges for the flow of a first one of the fluids and defined between two predomiantly planar surfaces of which at least one is provided by the membrane, said membrane having alternate furrows and ridges extending side-by-side in a direction with a component along the first conduit, said first conduit having a longitudinal direction extending generall in the direction of said flow; first pumping means for passing the first fluid with a mean flow along the first conduit, and second pumping means for applying fluid pressure alternately to generally opposite edges of said first conduit to superimpose on the mean flow a reciprocatory flow component transverse to the direction of mean flow and transverse to the length of the furrows and ridges to cause a resulting pulsation of fluid to translate the fluid first in one direction and then in an opposed direction past the furrows to produce in the furrows a rotary flow having components of motion parallel and perpendicular to the reciprocatory flow component and to the membrane.