48 results about "Oxygen tension" patented technology

A biosensor that utilizes a mediator, i.e., an isomer of phenanthroline quinone, 1,10-phenanthroline-5,6-dione, and a metal ion, such as manganese, with an enzyme dependent upon NAD(P)+, such as, for example, glucose dehydrogenase, for improving the hematocrit bias and oxygen bias of biosensors. The electrodes of the biosensors employing this mediator and a metal ion provide an accurate clinical response over a hematocrit range that ranges from about 20% to about 70% and over an oxygen tension range that ranges from about 1 kPa to about 20 kPa.

The HIF-1 transcription factor drives gene expression changes in hypoxia. While HIF-1 stimulates glycolysis, it also actively represses mitochondrial function and oxygen consumption by inducing pyruvate dehydrogenase kinase 1 (PDK1). PDK1 phosphorylates and inhibits pyruvate dehydrogenase from converting pyruvate to acetyl-CoA to fuel the mitochondrial TCA cycle. This causes a drop in mitochondrial oxygen utilization and results in a relative increase in intracellular oxygen tension.

Systems, devices and methods for sensing physiologic data and draining and analyzing bodily fluids are described which are capable of sensing physiologic data based on sensors incorporated into a catheter adapted to reside in any of a urinary tract, gastrointestinal tract, rectal location, pre-peritoneal, pleural space or other body cavity. The devices aid emptying of the bladder, measure urine output and various urine parameters such as oxygen tension, urine conductance and urine specific gravity, monitor renal function, analyze urine parameters, including urine content, including the presence of infection, and track and / or control fluid administration.

Apparatuses, systems, and methods are provided for growing and maintaining cells. A three-dimensional matrix, such as a hydrogel material, is seeded with cells and placed in a bioreactor having two compartments. The matrix is supported between the two compartments by first and second porous materials, which engage opposing surfaces of the matrix. A first media stream having certain properties is propagated through the first compartment, where it contacts one surface of the matrix via the first porous material. A second media stream having different properties is propagated through the second compartment such that it contacts the opposite surface of the matrix via the second porous material. Through migration of each stream at least partially into the matrix, various controlled gradients may be established within the matrix, encouraging growth of the cells. Such gradients include osmotic pressure, oscillating osmotic pressure, hydrostatic pressure, oxygen tension, and / or nutrient gradients.

A bioreactor device, and a method and system for fabricating tissues and growing cells and tissues in the bioreactor device, accommodates less than about 1 mL (or less than about 200 μL) of local medium volume but sample sizes of about 100 μL or greater. The bioreactor device includes a bioreactor chamber for containing a sample, where sample growth in response to mechanical, electrical, and biofactor stimulation is monitored through one or more optical ports. Embedded sensors are provided for measuring fluid pressure, pH, temperature, and oxygen tension. The bioreactor device can receive different types of mechanical loadings, including fluid shear, hydrostatic pressure, matrix compression, and clinorotation.

A composite for delivering extended-release of oxygen is disclosed. The composite can include a biocompatible polymeric support having a plurality of solid peroxide particles suspended therein. The polymer support can exhibit an oxygen tension value of at least 40 mmHg for a period of 14 days. The weight ratio of biocompatible polymeric support to solid peroxide particles can range from 1:1 to 99:1. Also disclosed is a method of using the composite to deliver oxygen to cells in both in vivo and in vitro environments.

Methods of weight management for a subject are provided. Generally the methods comprising: administering an effective amount to the small intestine and / or large intestine of the subject of at least one agent that increases oxygen tension and / or redox potential and / or pH in the colon of the subject to thereby manage the weight of the subject. Also provided are compositions comprising at least one agent that increases oxygen tension and / or redox potential and / or pH, wherein the composition is formulated for delivery of an effective amount of the at least one agent to the small intestine and / or large intestine of a subject following oral ad ministration of the composition to the subject.

The present invention relates to a method and a system for producing a mammalian pre-embryo and a stem cell having a better quality than prior art methods. The system comprises means for obtaining a mammalian oocyte, and means for obtaining a mammalian spermatozoa, and an apparatus having at least two separate air-tight chambers, for which the oxygen tension of one chamber may be changed independent of the oxygen tension of the other chamber, said at least two separate air-tight chambers constitute a main chamber and at least one residence chamber. The method for in vitro producing a mammalian pre-embryo comprising the steps: a1) providing a mammalian oocyte, a2) providing a mammalian spermatozoa, b) culturing the oocyte and the spermatozoa, c) fertilizing the oocyte with the spermatozoa obtaining a fertilized oocyte, and d) allowing cell-division of the fertilized oocyte obtaining a multicellular pre-embryo wherein at least one of the steps a1) or a2) is conducted at an oxygen tension below 15%, or e) allowing cell-division of the fertilized oocyte obtaining a multicellular pre-embryo, wherein the culture is performed at an oxygen tension allowing cultivation of the cells and wherein at least one of the steps comprises a change in the oxygen tension. Stem cells are produced from the multicellular pre-embryo.

The invention belongs to the technical field of traditional Chinese medicines and particularly provides a plaster for treating ulcer of lower limbs. The plaster for treating the ulcer of the lower limbs is prepared from angelica roots, pangolins, honeysuckles, a barbed skullcap herb, radix angelicae sinensis, radix rehmanniae, garden balsam stems, radix sileris, gallnuts, fructus forsythiae, stiff silkworms, peach kernels, cassia twigs, Chinese honeylocust spine, radix cyathulae, folium artemisiae argyi, long pepper, radix bupleuri, frankincense, myrrh, calomel, dragon's blood, camphor, borneol, musk, minium and sesame oil. The plaster follows the theory of 'removing necrotic tissues to promote tissue regeneration and removing pus to promote tissue regeneration' of Chinese medicine, enables the Chinese herbal medicines to be externally coated on affected parts, makes the medicine effects act on the local parts, conditions the oxygen tension of the affected parts and angiogenesis, facilitates dissolution of necrotic tissues and fibrous protein, promotes release of multiple growth factors and further achieves the purposes of relieving pain and accelerating wound healing, and clinical trials show that the plaster is remarkable in curative effect, economic, practical, free of side effects and worthy of clinical popularization and application.

A composite for delivering extended-release of oxygen is disclosed. The composite can include a biocompatible polymeric support having a plurality of solid peroxide particles suspended therein. The polymer support can exhibit an oxygen tension value of at least 40 mmHg for a period of 14 days. The weight ratio of biocompatible polymeric support to solid peroxide particles can range from 1:1 to 99:1. Also disclosed is a method of using the composite to deliver oxygen to cells in both in vivo and in vitro environments.