A surgical procedure requires reversal of oral anticoagulation to guarantee adequate hemostasis during and after the operation.
A surgical procedure requires reversal of oral anticoagulation to guarantee adequate hemostasis during and after the operation. This does not generally apply, however, to low dose (8 1 mg/d) aspirin therapy since, unlike high-dose antiplatelet drug therapy, it is not associated with increased perioperative bleeding. The key to management of a patient on long-term warfarin […]
For most surgical procedures, anticoagulation can be safely instituted after 1 2-24 hours of demonstrated hemostasis.
For most surgical procedures, anticoagulation can be safely instituted after 1 2-24 hours of demonstrated hemostasis. Some situations may temper that interval, including the nature of the operation, for example neurosurgery where bleeding into a closed space can be disastrous or when there is an ongoing difficulty with bleeding at the operative site. In low-risk […]
write down a ground state electronic configuration and indicate which electrons are core and which are valence
For each of the following atoms, write down a ground state electronic configuration and indicate which electrons are core and which are valence: (a) Na, (b) F, (c) N, (d) Sc. Draw energy level diagrams (see Fig. 1.15) to represent the ground state electronic configurations of the atoms in problem 1.26. Write down the […]
How do you account for the fact that, although potassium is placed after argon in the periodic table
How do you account for the fact that, although potassium is placed after argon in the periodic table, it has a lower relative atomic mass? What is the evidence that the aufbau principle is only approximately true? The first list in the table opposite contains symbols or phrases, each of which has a ‘partner’ in […]
Draw possible stereoisomers for the trigonal bipyramidal [SiF3Me2]_ anion (Me ¼ CH3).
(a) Draw possible stereoisomers for the trigonal bipyramidal [SiF3Me2]_ anion (Me ¼ CH3). An X-ray diffraction study of a salt of [SiF3Me2]. shows that two F atoms occupy axial sites. Suggest why this stereoisomer is preferred over the other possible structures that you have drawn. (b) Account for the fact that members of the series […]