Correct Answer: A

Rationale: If visible residue is noticed on the surgical instruments, it is crucial to re-sterilize them before using them for any procedure. Visible residue may indicate that the instruments are not sterile and could potentially introduce contaminants into the patient during the procedure, leading to infection or other complications. It is essential to maintain the highest standards of cleanliness and sterility in healthcare settings to ensure patient safety. Therefore, the nurse should take immediate action to re-sterilize the instruments before proceeding with any surgical procedure.

Correct Answer: C

Rationale: In a primiparous patient who complains of unrelieved perineal pain on the first postpartum day, Nurse Kayla should assess for a perineal hematoma. A perineal hematoma is a collection of blood in the perineal tissues and can cause significant pain and discomfort. It can be a result of trauma during delivery or due to a blood vessel rupture. This condition requires prompt assessment and intervention to prevent complications such as infection or excessive bleeding. Vaginal laceration would typically be identified during the delivery process and would have been repaired by the healthcare provider. History of drug abuse, while important to know for overall patient care, is not as relevant in this immediate postpartum pain assessment. Puerperal infection usually presents with other signs such as fever, foul-smelling discharge, and uterine tenderness, which are not mentioned in this scenario.

Correct Answer: C

Rationale: Autonomy is the ethical principle that upholds an individual's right to make decisions about their own medical treatment, free from coercion or undue influence. In this scenario, the 70-year-old patient has voluntarily decided not to have the pacemaker inserted despite the physician's recommendation. The fact that the decision is respected by the family further highlights the importance of autonomy in this situation. Respecting the patient's right to make choices regarding their own healthcare, even if it goes against medical advice, demonstrates a commitment to autonomy as an ethical principle.

Correct Answer: A

Rationale: T helper cells (Th cells) are primarily responsible for coordinating and regulating immune responses by producing cytokines that direct the activities of other immune cells. These cytokines help in activating cytotoxic T cells, B cells, macrophages, and other cells involved in the immune response. Th cells play a crucial role in mounting an effective immune response against infections and diseases by providing the necessary signals to activate and control various immune cells. Thus, T helper cells are considered the central coordinators of the immune system.

Correct Answer: B

Rationale: Submitting the audiotape to their research adviser is the appropriate action for the group to take after transcription. It is important to maintain the audiotape as a research record for verification purposes, especially if any discrepancies arise during the analysis of the transcript. The research adviser can provide guidance on how to securely store or handle the audiotape in compliance with research ethics and data protection guidelines. This ensures the integrity of the research process and supports transparency in the event of any future inquiries or validation requirements. Keeping a record of the audiotape and following proper protocols for its handling is essential in conducting ethical and reliable research.