Final answer:
A comprehensive patient history, including patient age and history of cardiac disease, is crucial in deciding whether to use ionic or nonionic contrast medium. Avoiding allergy medications before allergy testing is essential for accurate results. Identifying Type III hypersensitivities requires detailed patient history and specific diagnostic tests.
Step-by-step explanation:
When considering the administration of either an ionic or nonionic contrast medium, it's critical to take into account a comprehensive patient history. Factors such as patient age, a history of respiratory disease, and a history of cardiac disease all play a significant role in the decision-making process. A history of respiratory disease can increase the risk of adverse reactions to the contrast medium, while cardiac disease can complicate the patient's ability to handle the stress of the procedure.
The correct answer to the initial, implied question regarding the patient history to consider for contrast medium delivery would be 'D. 1 and 3 only', meaning both patient age and history of cardiac disease are important factors.
Critical Thinking on Allergy Testing
Patients are advised to avoid allergy medications prior to allergy testing because these medications can suppress the body's allergic responses. This is important to ensure the allergy tests can accurately detect what a patient is allergic to without the results being affected by the allergy medications.
Hypersensitivity Diagnosis
A comprehensive patient history is essential in the diagnosis of Type III hypersensitivities, which may present with nonspecific inflammatory symptoms similar to other diseases. Proper diagnosis often involves bronchoalveolar lavage (BAL), pulmonary function tests, and high-resolution computed tomography (HRCT).