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Carpentier -Edwards Valve (C-E) : This is porcine aortic valve preserved in gluteraldehyde and mounted on flexible stent made of cobalt-chromium-nickel alloy (ELGILOY). Gluteraldehyde, a chemical used for tanning of leather causes stability to valve leaflets due to cross linkage of collagen fibres and it reduces antigenicity. It has sewing ring with polytetra fluoro ethylene (PTFEGoretex), incorporating silicon rubber. Valves are available for aortic and mitral position in various sizes. Biological deterioration will occur after 7- 10 years but mechanical failure is uncommon. The rate of biological deterioration 'is faster in children.
Define about the Hyponatremia and Hypernatremia? Serum concentration of sodium is normally regulated within the range of 135 to 145 milimole per litre (a). Hyponatremia is defi
Hydrarch - Ecology Its various stages are well studied in ecosystem like ponds, pools and lakes. Since pond is a fresh water ecosystem, the succession in it is also referred t
Clinical Evaluation in maintenance in the Continuing Care Cycle Examination of gingival contours, along with mechanical evaluation of the prosthesis, implants, and implant comp
Describe in detail - Nacreous layer. The innermost of the three layers of a mollusc shell. It is also referred to as mother-of-pearl, it comprises thin layers or calcium carbon
What is Spermatogenesis in human biology? The male sex cells, or sperm, are produced in the oval-shaped testes, the primary sex organs of the male reproductive system, in a pro
Determine the food source for Magnesium? Magnesium is widely distributed in variety of foods and beverages. In plants it is associated with chlorophyll. Thus, green leafy veget
A kinase is in general an enzyme which catalyzes the transfer of the phosphate group from ATP to something else. In the molecular biology, it has acquired the more specific verbal
Q. What is the estimated percentage (in mass) of water in the human body? Is this percentage expected to be larger in the adult or in the old individual? Ans. Approximatel
Osmotic and Ionic Regulation The ammonotelism, ureotelism and uricotelism are the adaptations of the animals for the removal of toxic nitrogenous wastes and thereby maintain
Name two ways in which the chances of hypothermia can be reduced during outdoor activities. Eating well before going out and wearing warm, wind-proof clothing can reduces the c
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