Central venous access device refers to a small, flexible tube positioned in large veins for an individual who needs continuous access to the bloodstream. Such devices are usually considered as catheters or venous access ports, as they permit regular access to the veins without application of deep needle sticks.
All the CVADs require a dressing immediately post insertion of the device to reduce the threat of infection. It requires a dressing surrounding the entrance to the tunnel of the skin unless and until the wound gets healed. This can take about 10 to 14 days based on the condition of the patient.
The right answer is Carbon fixation
Rubisco (or ribulose-1,5-diphosphate carboxylase / oxygenase) is a plant enzyme involved in the Calvin cycle and more particularly in the fixation of carbon dioxide.
Rubisco, located in chloroplasts, is the most abundant protein in plant biomass and even in total biomass.
Answer:
Combustion of a substance
Explanation:
Johann Becher in 1669 proposed that all the material are composed of the rocks, water and the oils present in the Earth.
When the material is burned, the oil present in the material which is responsible for the combustion. The oil is escaped into the atmosphere which is released through fire and flames are the signs that it is releasing.
In 1703, George Sthal renamed this combustible component called the "Phlogiston" which is taken from the Greek language to refer in flame.
Therefore, phlogiston is responsible for the combustion of a substance.
Prothrombin time will be prolonged due to deterioration of factor V.
Explanation:
Prothrombin time (PT) assess the function of the blood clotting factors which include – vitamin K and factors I, II V, VII and X.
The PT will be longer than the standardized international normalized ratio (INR) if under any blood-thinning medications, absence or deterioration of blood clotting factors, or any inhibitors which inhibit the clotting factors.
While conducting a PT test, the blood sample is taken in a small test tube containing sodium citrate. The sodium citrate is an anticoagulant which will prevent coagulation.
The sample tube should be filled with the blood collected and the tube should also be inverted frequently to prevent any coagulation. The specimen collecting tube with sodium citrate is usually marked with a light blue color.
Sodium citrate is used as the anticoagulant because it keeps the specimen stable with the help of its calcium chelating properties. However, at room temperature the specimen can be stable for about four hours.
Prolonged h and hours will deteriorate the coagulation factor V because the pH of the citrate solution is high mostly above 8.0 and hence prolonging the specimen in it will deteriorate the labile factor V