A device for treating blood comprising a first set of fluid channels for blood and a second set of channels for a treatment fluid. Each channel of the first set is defined by a pair of panels of semi-permeable membrane which are supported along spaced-apart lines by supports. At least a portion of the channels of the second set are defined by a pair of membrane panels and a pair of the supports. Each set of channels is arranged into a plurality of layers, the layers alternating between channels ...

A blood chamber for an arterial line of an extracorporeal blood system. The chamber is a flow through device for blood with an air cushion over the blood and access structure for sampling and treating the blood. A pressure tap in the chamber communicates the air cushion with a pressure transducer to facilitate measurement of blood pressure within the chamber. Undesirable obstruction of the pressure tap by blood foam is reduced by introducing blood into the chamber through a submerged inlet. The ...

A blood oxygenator is provided with a preformed defoaming member of open-cell sponge material of synthetic plastic disposed in the defoaming chamber in series between the oxygenating chamber and the blood reservoir chamber of the oxygenator. Spaces are provided between the defoaming member and the upper and lower walls of the defoaming chamber to produce a reduced resistance to the flow of gas and blood. A fine mesh filter and funnel are connected to the defoaming chamber to gently transfer and ...

A blood dialyzer has a housing enclosing a blood compartment and a compartment for dialysis fluid separated by a semi-permeable membrane, inlet and outlet to each compartment, a tube connected between the inlet and outlet of the latter compartment, means for circulating dialysis fluid through the compartment and the tube and means for removing fluid from the circuit and for adding fresh fluid. Air in the compartments may be purged therefrom with a water soluble gas.

A device for treating human blood prior to its return to a living human body. The blood filter employs a bed of particles between about 50 and 1,000 microns in size, the outer surface of which particles is formed of impermeable carbon. Suitable spheres may be coated with vapor-deposited pyrolytic carbon, and the particles may be supported between upper and lower screens which are likewise coated.

A blood oxygenator comprising a first embodiment of a fluid tight housing having a chamber formed therein one end of which is fluid connected by a conduit to a source of blood to be oxygenated, the other end fluid connected for returning oxygenated blood to the source, a plurality of liquid impermeable, gas permeable tubes extended through the chamber for transferring therethrough oxygen at a pressure higher than the partial pressure of the oxygen in the blood, and one or more membranes forming ...

The present invention provides methods for inhibiting blood clotting. In general, the methods include adding corn trypsin inhibitor (CTI) to blood or a blood product in an amount sufficient to inhibit the clotting. The CTI can be used alone or in combination with other anti-coagulants. In one aspect, the invention features plasma clotting assays featuring substantially prolonged clotting times. Clotting assays using whole or minimally altered blood are also provided. Further provided are methods...

A blood oxygenating device having an oxygenating chamber and a heat exchanger chamber. The oxygenating chamber consists of a bubbler chamber and a mixing chamber. Oxygen is introduced into the bubbler chamber through a porous diffusion means situated near the inlet of the bubbler chamber. Bubbles pass from the bubbler chamber into a mixing chamber which is provided with a plurality of secondary flow-producing deflectors to promote secondary flow of blood bubbles passing therethrough. The seconda...

In a blood lancet consisting of a handle and a tip, which are injection molded in one piece of plastic, there is provided according to the invention a protective yoke which protects the tip against damage. The protective yoke (24) is integrally molded to the handle in one piece, leaving predetermined break points, so that it can be broken off. The tip of rhombic cross-section comprises a base which imparts mechanical stability and limits the pricking depth, and an offset fine pricking tip.

A blood collector includes a cylindrical body having a closed end and an open end, and a hollow body is arranged coaxially at the closed end of the cylindrical body and has a hole communicating with the interior of the cylindrical body. A columnar body is arranged within the cylindrical body to be in tight contact with an inner wall thereof, with a distal end defining a blood collection space with the closed end of the cylindrical body. Further, the columnar body has a hole which allows the bloo...