Correct Answer: C

Rationale: When the nurse collects data at one point in time, it is referred to as a cross-sectional study. Cross-sectional studies are observational research designs that provide a snapshot of a population or a sample at a specific point in time. This type of study can help identify associations or relationships between variables at a single time point but cannot establish causality or determine changes over time. In contrast, time series involve collecting data over multiple time points, longitudinal studies follow individuals or samples over time to track changes or outcomes, and crossover studies involve multiple interventions or treatments over different periods.

Correct Answer: B

Rationale: Obtaining informed consent is primarily the responsibility of the physician. Informed consent is a crucial ethical and legal concept in healthcare that requires the healthcare provider, usually the physician, to ensure that the patient understands the proposed treatment, including the risks, benefits, alternatives, and potential outcomes, before agreeing to proceed with the treatment. While other healthcare professionals, such as nurses, nurse managers, anesthesiologists, and midwives, may also play a role in the informed consent process by providing information and clarifying details, it is ultimately the physician who must obtain the patient's informed consent before any treatment or procedure is performed.

Correct Answer: D

Rationale: Nursing mothers should not wash their nipples with soap and water prior to feeding. Using soap can dry out the skin and potentially lead to irritation or cracking of the nipple, which can increase the risk of mastitis. It is recommended to simply clean the nipples with water, if necessary.

Correct Answer: A

Rationale: This scenario falls under the category of invasion of privacy. Invasion of privacy occurs when a person's private information or images are shared or used without their consent, leading to an intrusion of their private life. In this case, Kris, as a hospitalized movie star, had her picture taken without permission by the nursing assistant, which was later sold to a local newspaper. Kris has a right to privacy, especially during a vulnerable time like being hospitalized, and the nursing assistant violated that right by taking and selling her picture without consent. This action constitutes an invasion of privacy.

Correct Answer: C

Rationale: When the nurse collects data at one point in time, it is referred to as a cross-sectional study. Cross-sectional studies are observational research designs that provide a snapshot of a population or a sample at a specific point in time. This type of study can help identify associations or relationships between variables at a single time point but cannot establish causality or determine changes over time. In contrast, time series involve collecting data over multiple time points, longitudinal studies follow individuals or samples over time to track changes or outcomes, and crossover studies involve multiple interventions or treatments over different periods.