Mary Smith has been experiencing nausea and vomiting for the past three days, and she has been admitted for dehydration. At the time of admission, the cause of the vomiting was not known. Select the appropriate ICD-9-CM code(s) using an ICD-9-CM codebook

An anemic patient has a reticulocyte production index (RPI) of 1. What does this value suggest?

A) Erythropoiesis is inadequate and indicative of possible pathology. B) Erythropoiesis is occurring at a rate equal to red blood cell degradation. C) Erythropoiesis is proceeding at a normal rate. D) Both B and C are correct.

Auscultation of the chest on an adult patient intubated with an 8.0 mm endotracheal tube reveals diminished breath sounds on the left side. This is mostly likely caused by

A. left-sided fluid consolidation B. intubation of the right mainstem bronchus C. left-sided pneumothorax D. pleural effusion