The rule of thumb is most women need about 300 extra calories every day during the last five to six months of pregnancy for good fetal development. This will combine to a healthy weight gain of about one pound each week.
In general, the brain can withstand up to three to six minutes without oxygen before brain damage occurs, but this may vary from person to person.If the brain goes without oxygen longer than this, serious and often irreversible damage is likely to take place.eath is usually declared once the brain has gone more than 15 minutes without oxygen. Although the brain can only go a few minutes without oxygen before some type of brain damage occurs, patients can often regain cognitive function if treated quickly.
6) the worst possible thing one can do is with-hold oxygen to someone demonstrating critically low blood oxygen levels...deliver what you can to get them to 90-94%. A non-rebreather mask may not deliver enough oxygen to a patient as their condition worsens.Therefore, as long as you can demonstrate a need for oxygen, a non-rebreather mask may be perfectly acceptable and occasionally insufficient.) the worst possible thing one can do is with-hold oxygen to someone demonstrating critically low blood oxygen levels...deliver what you can to get them to 90-94%. A non-rebreather mask may not deliver enough oxygen to a patient as their condition worsens.