Abstract:
A validatable method for determining a photochemically effective dose for inactivating pathogens in a fluid sample is described herein. In particular, the instant invention covers methods for determining a photochemically effective doses sufficient to inactivate pathogens in a biological sample while leaving biologically active substances of interest unaffected. A batch irradiation reactor effective for inactivating pathogens in biological samples is also described.
Abstract:
A permeable structure (16) forms a chamber (12) to hold living cells (14). The structure includes a first permeable region (18) surrounding at least a portion of the chamber (12) having a confirmation that, when implanted is host tissue, substantially blocks penetration of host cells into the chamber (12) while permitting solute transport. The structure (16) also includes a second permeable region (20) overlaying the first permeable region (18) having a confirmation that, when implanted in host tissue, forms a permeable interface with host tissue that permits solute transport. A third permeable region (22) is located between the first (18) and second (20) permeable regions. The third region (22) comprises a solution of polymer material formed in place between the first (18) and second (20) permeable regions. The third permeable region (22) bonds the first (18) and second (20) permeable regions together. The third permeable region (22) also has a confirmation that, when implanted in host tissue, permits solute transport between the first (18) and second (20) permeable regions together, providing a robust, laminated structure that resists delamination during implantation caused by cellular infiltration into discontinuous spaces between the first (18) and second (20) regions. The third, formed-in-place region (22) can also have a confirmation providing an immunoisolation effect. Furthermore, the permeability of the third, formed-in-place membrane (22) is sufficient high that it does not adversely effect the permability value desired for the overall multiple layer structure (16).
Abstract:
Implant assemblies (10) and methodologies provide immuno-protection for implanted allografts, xenografts, and isografts. The assemblies and methodologies establish an improved boundary (34) between the host and the implanted cells. The boundary (34) has a pore size, an ultimate strength, and a metabolic transit value that assures the survival of the cells during the critical ischemic period and afterward. The boundary (34) allows the fabrication and clinical use of implant assemblies (10) and methodologies that can carry enough cells to be of therapeutic value to the host, yet occupy a relatively small, compact area within the host.
Abstract:
The present invention relates to a method for determining an effective dose of monochromatic or polychromatic light from one or more light sources to inactivete microorganisms present in a biological fluid, preferably a non-trannsparent fluid. Moreover, there is provided a method for the inactivation of microorganism in a biological fluid in a flow-through-reactor. Moreover, the invention advantageously provides a flow-through-reactor with one or more thermostated light sources. The invention further provides a method of controlling the light sum dose of monochromatic or polychromatic light emitted from one or more light sources to effectively inactivate microorganisms present in a biological fluid in a batch reactor.
Abstract:
The present invention relates to a method for determining an effective dose of monochromatic or polychromatic light from one or more light sources to inactivete microorganisms present in a biological fluid, preferably a non-trannsparent fluid. Moreover, there is provided a method for the inactivation of microorganism in a biological fluid in a flow-through-reactor. Moreover, the invention advantageously provides a flow-through-reactor with one or more thermostated light sources. The invention further provides a method of controlling the light sum dose of monochromatic or polychromatic light emitted from one or more light sources to effectively inactivate microorganisms present in a biological fluid in a batch reactor.
Abstract:
Membranes and methods for making membranes are disclosed. The membranes (10) include a polymeric matrix (16) and a particulate material immobilized within the matrix. The membrane may further include a skin layer (19) having randomly spaced surface pores (21). The membranes may find particular application in methods and apparatus for removing organic compounds from a biological fluid as part of a pathogen inactivation treatment.
Abstract:
Microporous membranes (10) comprising polyvinylidene difluoride and methods for making such membranes are disclosed. The membranes (10), which are not crosslinked and are not contacted with a strong alkali solution during manufacture, are wettable by aqueous solution even after repeated wetting and drying. The membrane includes a support (18) and surfaces (11) treated with a hydrophilic coating. Separately, such membranes are also useful in apparatus (60) for separating a biological fluid into two or more components.
Abstract:
Methods and systems for collection of blood components, such as plasma, from donors (D). One method includes the steps of collecting a unit of whole blood from a donor (D); forcing the collected blood unit through a plasma separator (90); accumulating the plasma in a container (94); and returning concentrated cells to the donor (D). One system includes a disposable blood collection set (14) and a reusable fixture (12) into which the collection set (14) can be mounted. The fixture (12) is operated by a self-contained energy source requiring no exterior electrical connection or other external source of energy.
Abstract:
A membrane (10) and a method for making a membrane (10) are disclosed. The membrane (10) includes a polymeric matrix (16) and a particulate material immobilized within the matrix (16). The membrane (10) may include a support (18) within the core of the mebrane (10) and may further include a skin (19). The membrane (10) may find particular application in methods and apparatus for removing organic compounds from a biological fluid as part of a pathogen inactivation treatment.