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Blood Urea Nitrogen
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D001806 |
[The urea concentration of the blood stated in terms of nitrogen content. Serum (plasma) urea nitrogen is approximately 12% higher than blood urea nitrogen concentration because of the greater protein content of red blood cells. Increases in blood or serum urea nitrogen are referred to as azotemia and may have prerenal, renal, or postrenal causes. (From Saunders Dictionary & Encyclopedia of Laboratory Medicine and Technology, 1984)
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Blood Vessel Prosthesis
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D001807 |
[Device constructed of either synthetic or biological material that is used for the repair of injured or diseased blood vessels.
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Blood Vessel Prosthesis Implantation
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D019917 |
[Surgical insertion of BLOOD VESSEL PROSTHESES to repair injured or diseased blood vessels.
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Blood Vessels
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D001808 |
[Any of the tubular vessels conveying the blood (arteries, arterioles, capillaries, venules, and veins).
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Blood Viscosity
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D001809 |
[The internal resistance of the BLOOD to shear forces. The in vitro measure of whole blood viscosity is of limited clinical utility because it bears little relationship to the actual viscosity within the circulation, but an increase in the viscosity of circulating blood can contribute to morbidity in patients suffering from disorders such as SICKLE CELL ANEMIA and POLYCYTHEMIA.
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Blood Volume
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D001810 |
[Volume of circulating BLOOD. It is the sum of the PLASMA VOLUME and ERYTHROCYTE VOLUME.
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Blood Volume Determination
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D001811 |
[Method for determining the circulating blood volume by introducing a known quantity of foreign substance into the blood and determining its concentration some minutes later when thorough mixing has occurred. From these two values the blood volume can be calculated by dividing the quantity of injected material by its concentration in the blood at the time of uniform mixing. Generally expressed as cubic centimeters or liters per kilogram of body weight.
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Blood-Air Barrier
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D015824 |
[The barrier between capillary blood and alveolar air comprising the alveolar EPITHELIUM and capillary ENDOTHELIUM with their adherent BASEMENT MEMBRANE and EPITHELIAL CELL cytoplasm. PULMONARY GAS EXCHANGE occurs across this membrane.
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Blood-Aqueous Barrier
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D018916 |
[The selectively permeable barrier, in the EYE, formed by the nonpigmented layer of the EPITHELIUM of the CILIARY BODY, and the ENDOTHELIUM of the BLOOD VESSELS of the IRIS. TIGHT JUNCTIONS joining adjacent cells keep the barrier between cells continuous.
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Blood-Borne Infections
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D000086982 |
[Diseases due to or propagated by body fluids from hosts whose BLOOD has been contaminated with pathogens.
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Blood-Borne Pathogens
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D017848 |
[Infectious organisms, including pathogenic bacteria, viruses, and fungi, that are present in the BLOOD.
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Blood-Brain Barrier
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D001812 |
[Specialized non-fenestrated tightly-joined ENDOTHELIAL CELLS with TIGHT JUNCTIONS that form a transport barrier for certain substances between the cerebral capillaries and the BRAIN tissue.
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Blood-Nerve Barrier
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D049428 |
[The barrier between the perineurium of PERIPHERAL NERVES and the endothelium (ENDOTHELIUM, VASCULAR) of endoneurial CAPILLARIES. The perineurium acts as a diffusion barrier, but ion permeability at the blood-nerve barrier is still higher than at the BLOOD-BRAIN BARRIER.
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Blood-Retinal Barrier
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D001813 |
[A specialized transport barrier, in the EYE, formed by the retinal pigment EPITHELIUM, and the ENDOTHELIUM of the BLOOD VESSELS of the RETINA. TIGHT JUNCTIONS joining adjacent cells keep the barrier between cells continuous.
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Blood-Testis Barrier
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D001814 |
[A specialized barrier, in the TESTIS, between the interstitial BLOOD compartment and the adluminal compartment of the SEMINIFEROUS TUBULES. The barrier is formed by layers of cells from the VASCULAR ENDOTHELIUM of the capillary BLOOD VESSELS, to the SEMINIFEROUS EPITHELIUM of the seminiferous tubules. TIGHT JUNCTIONS form between adjacent SERTOLI CELLS, as well as between the ENDOTHELIAL CELLS.
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Bloodless Medical and Surgical Procedures
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D057668 |
[The treatment of patients without the use of allogeneic BLOOD TRANSFUSIONS or blood products.
, Medical, pre-operative, and post-operative organizational approaches that support patients who refuse allogeneic BLOOD TRANSFUSIONS or blood products for personal reasons, religious beliefs, or fear of bloodborne infections. Preparations for AUTOLOGOUS BLOOD TRANSFUSIONS may be a component of some programs.
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Bloodletting
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D001815 |
[Puncture of a vein to draw blood for therapeutic purposes. Bloodletting therapy has been used in Talmudic and Indian medicine since the medieval time, and was still practiced widely in the 18th and 19th centuries. Its modern counterpart is PHLEBOTOMY.
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Bloom Syndrome
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D001816 |
[An autosomal recessive disorder characterized by telangiectatic ERYTHEMA of the face, photosensitivity, DWARFISM and other abnormalities, and a predisposition toward developing cancer. The Bloom syndrome gene (BLM) encodes a RecQ-like DNA helicase.
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Blotting, Far-Western
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D026481 |
[A method that is derived from western blotting (BLOTTING, WESTERN) and is used to detect protein-protein interactions. The blotted proteins are probed with a non-antibody protein which can then be tagged with a labeled antibody.
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Blotting, Northern
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D015152 |
[Detection of RNA that has been electrophoretically separated and immobilized by blotting on nitrocellulose or other type of paper or nylon membrane followed by hybridization with labeled NUCLEIC ACID PROBES.
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