Correct Answer: D

Rationale: The first step Nurse Gabriela should do when handling vaccines is to check the vial for the expiration date. It is crucial to ensure that the vaccine has not expired before proceeding with any further steps. Administering an expired vaccine can be ineffective or even harmful to the patient. Therefore, checking the expiration date is the foundational step in the safe and proper administration of vaccines.

Correct Answer: C

Rationale: Chest pain, dyspnea, hypotension, and ST-segment elevation on an ECG in the inferior leads are classic signs of an acute myocardial infarction (MI). An acute MI occurs when there is a sudden blockage of blood flow to a part of the heart muscle, leading to tissue damage. This causes symptoms such as chest pain due to ischemia, dyspnea due to heart failure, and hypotension due to poor cardiac output. The ST-segment elevation seen on the ECG is indicative of significant myocardial injury. Prompt diagnosis and management are crucial in acute MI to prevent further complications and to minimize damage to the heart muscle. It is important to differentiate an acute MI from stable or unstable angina or other cardiovascular disorders, as the management and prognosis vary significantly.

Correct Answer: A

Rationale: The nurse should prioritize ensuring proper zeroing and calibration of the ICP monitoring system to ensure procedural accuracy and reliability of the measurements obtained. Proper zeroing involves setting the transducer at the level of the patient's external auditory meatus (ear), which serves as a reference point for accurate ICP readings. Calibration is necessary to establish accurate pressure measurements. Incorrect zeroing or calibration can lead to inaccurate ICP readings, which can impact clinical decision-making for patients with traumatic brain injury. Positioning the patient in a high-Fowler's position, administering prophylactic antibiotics, or placing the ICP monitor in the subarachnoid space via lumbar puncture are not directly related to ensuring the accuracy of the ICP monitoring procedure.

Correct Answer: A

Rationale: The described presentation is classic for acute angle-closure glaucoma. This condition is characterized by sudden-onset severe eye pain, headache, nausea, and vomiting. The red eye, steamy cornea (corneal edema), and mid-dilated non-reactive pupil are consistent with acute angle-closure glaucoma. The sudden increase in intraocular pressure leads to impaired aqueous humor outflow, causing these symptoms. Immediate intervention is required to prevent permanent vision loss in such cases. Central retinal artery occlusion would present with sudden painless vision loss. Optic neuritis typically presents with vision loss and pain with eye movements. Corneal ulcer presents with eye discomfort, foreign body sensation, and may have a history of corneal trauma or contact lens wear.

Correct Answer: A

Rationale: The most appropriate nursing intervention to alleviate breast engorgement and discomfort in a breastfeeding client is to encourage frequent breastfeeding or pumping sessions. Engorgement occurs when the breasts become overly full of milk, causing them to become swollen, firm, and painful. By ensuring that the baby breastfeeds frequently, the client can effectively empty the breasts, which helps to relieve engorgement and discomfort. Encouraging the client to breastfeed on demand and ensuring proper latching can help prevent further engorgement issues. Pumping can also be useful if the baby is unable to feed directly from the breast or to relieve engorgement between feedings. This intervention addresses the root cause of the problem and promotes the client's comfort and breastfeeding success. Applying cold packs, using a supportive bra or breast binder, and administering oral analgesics may provide some relief for discomfort but do not address the underlying issue of engorgement.