The nurse places a call to the provider that the 74-year-old patient’s potassium level is 7.1 mEq/dL. The nurse is prepared to answer which questions from the provider? Select all that apply.  

The 49-year-old patient presented with a breast lump found during her monthly breast self-exam. This is confirmed on mammogram; the lump was biopsied and found to be an adenocarcinoma that is HER2/neu negative. The patient requests that interventions conserve as much of her breast tissue as possible. The nurse prepares the patient for which next step in management?  

A neonate is born at full term to a mother who did not receive prenatal care. The neonate required moderate resuscitation at birth. Upon assessment, the nurse notes poor muscle tone, a protruding tongue, low nasal bridge, and low-set ears. A loud continuous “machine-like” heart murmur is heard. The patient requires 85% FiO2 to maintain an oxygen saturation above 90%. Which of the following tests is the next best diagnostic step in the management of this patient?