1. The document discusses several non-invasive diagnostic procedures for critically ill patients including chest x-rays, computed tomography scans, ultrasounds, echocardiograms, and pulse oximetry.
2. For each procedure, the document outlines the nursing responsibilities before, during, and after including preparing the patient, monitoring them for discomfort, and assessing them post-procedure.
3. Maintaining patient safety is a key concern, such as shielding vulnerable areas from radiation and monitoring for reactions to contrast dyes.