Explanation/Reference:
Explanation:
(A) The nurse may never discontinue a central line without a physician's order. (B) The nurse may never initiate a peripheral IV without a physician's order except in an emergency situation. (C) The nurse should always document findings and alert the physician to the findings as well. The physician may then initiate a new central line and order the current central line to be discontinued. (D) Besides cleaning and redressing, the nurse should always document the findings.

Explanation
(A) Both a benign and a malignant tumor can displace or destroy nearby structures or increase intracranial pressure. (B) Benign or malignant brain tumors grow at different rates depending on the type of tumor. (C) Some benign tumors do become malignant tumors. (D) Whether or not a tumor is operable depends on its location and the amount of damage its removal will cause.

(A) Because the extremity may continue to swell and the cast could constrict circulation, the nurse should elevate the limb and observe for capillary refill, warmth, mobility of toes and circulation. (B) Although muscle tone may diminish over time in the affected limb, this is not the immediate concern. (C) The limb has been immobilized already by the cast, and therefore immobilization is not a concern. (D) Heated fans and dryers are discouraged because the outside cast will dry quickly, yet the area beneath the cast remains wet and could cause burns.

Section: Questions Set G
Explanation:
(A) Thioridazine (an antipsychotic drug), lithium (an antimanic drug), and benztropine (an antiparkinsonism agent) are generally administered to treat schizophrenic and bipolar disorders. (B) Atropine (a cholinergic blocker), sodium brevitol (a shortacting anesthetic), and succinylcholine (a neuromuscular blocker) are administered either before or during ECT to coun teract bradycardia and to provide anesthesia and total muscle relaxation. (C) These are electrolyte substances administered to correct fluid and electrolyte imbalances in the body. (D) Carbamazepine (an anticonvulsant), haldoperidol (an antipsychotic), and trihexyphenydyl (an antiparkinsonism agent) are usually administered in psychiatric settings to control problems associated with psychotic behavior.

Explanation/Reference:
Explanation:
(A) Nausea and vomiting are experienced by almost half of all pregnant women during the first 3 months of pregnancy as a result of elevated human chorionic gonadotropin levels and changed carbohydrate metabolism. (B) Quickening is the mother's perception of fetal movement and generally does not occur until 18-20 weeks after the last menstrual period in primigravidas, but it may occur as early as 16 weeks in multigravidas. (C) During the first trimester there should be only a modest weight gain of 2-4 lb. It is not uncommon for women to lose weight during the first trimester owing to nausea and/or vomiting. (D) Physical changes are not apparent until the second trimester, when the uterus rises out of the pelvis.