Correct Answer: C

Rationale: Insulin glargine (Lantus) is a long-acting insulin that is typically administered once daily at the same time each day to help maintain a steady level of insulin in the body. It is important to rotate injection sites within the same body region (such as the abdomen, thigh, or upper arm) to prevent lipodystrophy (lumpiness or dents in the skin) and to ensure consistent absorption of the insulin. Proper rotation of injection sites helps to prevent tissue damage and ensures optimal insulin absorption, improving the effectiveness of insulin therapy. It is not necessary to inject insulin glargine before meals, vigorously shake the vial, or administer it with a rapid-acting insulin.

Correct Answer: C

Rationale: Cryptosporidium parvum is a parasite commonly found in contaminated water sources such as streams or lakes. It causes an infection called cryptosporidiosis, which often presents with symptoms like watery diarrhea, abdominal cramps, and nausea. The oocysts of Cryptosporidium parvum can be identified in stool samples, making it the likely culprit in this scenario. Giardia lamblia, another common waterborne parasite, can also cause similar symptoms but is characterized by trophozoites rather than oocysts in stool samples. Entamoeba histolytica is associated with amoebic dysentery and does not typically present with watery diarrhea. Cyclospora cayetanensis is another parasite causing gastrointestinal symptoms but is not as commonly associated with contaminated water sources as Cryptosporidium parvum.

Correct Answer: C

Rationale: The nurse's priority action when noticing a malfunctioning anesthesia machine in the operating room should be to inform the anesthesia provider immediately. Anesthesia providers are responsible for administering anesthesia safely during surgical procedures, and they need to be made aware of any equipment issues promptly to ensure patient safety. Continuing with the surgical procedure using a malfunctioning anesthesia machine can pose serious risks to the patient's well-being. Using an alternative anesthesia machine may be an option, but informing the anesthesia provider first ensures that the appropriate action is taken to address the issue effectively. Documenting the malfunction in the equipment log is important for record-keeping purposes, but it should not take precedence over informing the anesthesia provider and taking immediate action to address the problem.

Correct Answer: B

Rationale: In the case of umbilical cord prolapse, the priority nursing action is to prepare for an immediate cesarean section. Umbilical cord prolapse is a serious obstetric emergency where the umbilical cord slips through the cervix ahead of the presenting part of the fetus. This can lead to compression of the cord, compromising fetal blood flow and oxygenation. Immediate delivery via cesarean section is necessary in order to prevent fetal hypoxia and avoid potential complications such as brain damage or death. Elevating the mother's hips or administering intravenous fluids rapidly may be interventions done in conjunction with preparing for a cesarean section, but the priority remains expedited delivery of the baby. Applying external fetal monitoring is not the most appropriate action in this emergency situation.

Correct Answer: A

Rationale: Long-term corticosteroid use in patients with rheumatoid arthritis can lead to osteoporosis, which is a common complication. Osteoporosis causes weakening of the bones, increasing the risk of fractures, particularly in weight-bearing bones such as the hip, spine, and wrist. Osteoporotic fractures are a significant concern in patients on long-term corticosteroid therapy, highlighting the importance of monitoring bone health and considering preventive measures such as calcium, Vitamin D supplementation, and regular bone density testing. While osteonecrosis of the femoral head and avascular necrosis of the talus can also occur as complications of corticosteroid use, osteoporotic fractures are more commonly associated with this type of therapy in patients with rheumatoid arthritis. Septic arthritis, on the other hand, is not directly related to corticosteroid use but can occur due to other factors such as joint infections.