Explanation
(A) Tetany is seen with low calcium. (B) Low potassium causes dysrhythmias because potassium is responsible for cardiac muscle activity. (C) Numbness of extremities is seen with high potassium. (D) Headache is not associated with potassium excess or deficiency.

(A) A residual volume of 20 mL is not excessive. (B) A residual volume of 25 mL is not excessive. (C) A residual volume of 30 mL is not excessive. (D) Tube feedings should be withheld and physician notified for residual volumes of 50-100 mL.

Explanation/Reference:
Explanation:
(A) This answer is incorrect. Phenothiazines are antipsychotic drugs and produce the symptoms. (B) This answer is correct. Anticholinergic agents are often used prophylactically for extrapyramidal symptoms.
They balance cholinergic activity in the basal ganglia of the brain. (C) This answer is incorrect. Anti- Parkinsonian drugs would increase the symptoms. (D) This answer is incorrect. Tricyclic agents are used for symptoms of depression.

(A) Prednisone is not linked with hematological side effects. (B) Timolol, a -adrenergic blocker is metabolized by the liver. It has not been linked to blood dyscrasia. (C) Gentamicin is ototoxic and nephrotoxic. (D) Phenytoin usage has been linked to blood dyscrasias such as aplastic anemia. The drug most commonly linked to aplastic anemia is chloramphenicol (Chlormycetin).

Explanation
(A) Monthly blood transfusions are not indicated postgastrectomy. (B) Increasing iron in the client's diet may cause irritation and will not alleviate pernicious anemia. (C) It may be necessary that the client eat small meals several times per day, but this measure has no relevance to prevention of pernicious anemia. (D) Pernicious anemia is caused by lack of Vitamin B12, and replacement therapy will be necessary because the client's stomach has been removed.