A client is admitted to the emergency room with chest pain and a suspected diagnosis of acute myocardial infarction (MI). Which test would the nurse expect the physician to order to make a definitive diagnosis of MI?

Choice A rationale

The oral mucosa is the most reliable indicator of central cyanosis because it reflects the oxygenation of central tissues. When there is a lack of oxygen in the bloodstream, the lips and mucous membranes, such as the oral mucosa, appear blue or cyanotic. This is a clear sign that the central tissues are not receiving adequate oxygenation.

Choice B rationale

The sclera of the eye is not a reliable indicator of central cyanosis. The sclera is white and does not change color due to oxygen levels. Instead, it may become yellow in jaundice or red in inflammation but does not reflect central cyanosis.

Choice C rationale

The ear lobes are peripheral areas and do not reliably indicate central cyanosis. Peripheral cyanosis can occur due to local blood flow issues, and ear lobes can appear blue in cold conditions even when central oxygenation is normal.

Choice D rationale

The soles of the feet, similar to the ear lobes, are peripheral areas and not reliable indicators of central cyanosis. Cyanosis in the feet can result from poor peripheral circulation rather than central hypoxia.

Choice A rationale

Administering post-procedure antibiotics is not typically required for a bronchoscopy unless there is evidence of infection. The procedure itself does not inherently pose a high risk of infection requiring antibiotics as a preventative measure.

Choice B rationale

Providing pre-procedure sedation is important to ensure the client is comfortable and relaxed during the bronchoscopy. This helps minimize discomfort and anxiety associated with the procedure.

Choice C rationale

Ensuring the client is NPO (nothing by mouth) for a specific period before the procedure is crucial to prevent aspiration. Aspiration can occur if the client has food or liquid in their stomach, posing a serious risk during the insertion of the bronchoscope.

Choice D rationale

Encouraging the client to drink plenty of fluids before the procedure is not appropriate because the client needs to be NPO to prevent aspiration risks during the bronchoscopy.