A client has a mean arterial blood pressure (MAP) of $97 \mathrm{mmHg}$ and an intracranial pressure (ICP) of $12 \mathrm{mmHg}$. What is the cerebral perfusion pressure (CPP) for this client?

Correct Answer: B

Rationale: CPP = MAP - ICP; 97 - 12 = 85 mmHg (B). Other options (A, C, D) miscalculate. B is correct. Rationale: CPP measures brain perfusion; 85 mmHg is within normal (60-100 mmHg), critical for assessing adequacy post-injury, per neurocritical care formulas.

Correct Answer: C

Rationale: Documentation is a cornerstone of nursing practice, and recognizing the chart as a legal document is paramount. It serves as the primary evidence of care provided, protecting the nurse in legal disputes by detailing actions, observations, and client responses. If called to court, this record may be the only defense against claims of negligence or improper care, making accuracy and completeness essential. Brevity might compromise detail, undermining its legal value, while specific formats like SOAP enhance clarity but aren't the core issue. Hourly documentation isn't universally required unless specified by policy; the focus is on capturing significant events. This understanding ensures nurses document with precision, safeguarding both client care and professional accountability in a legal context.

Correct Answer: C

Rationale: An electrical fire requires a Class C extinguisher, designed for energized electrical equipment like appliances or wiring. Class A suits ordinary combustibles (wood), Class B handles flammable liquids, and Class E isn't standard (often confused with electrical but not U.S.-classified). Using a Class C extinguisher, typically with non-conductive agents like carbon dioxide, ensures safety by avoiding shock while extinguishing. This choice protects both the nurse and client in a healthcare setting, aligning with fire safety protocols.

Correct Answer: A

Rationale: Hospital policy dictates who takes telephone orders, ensuring legal and safety compliance, typically a licensed nurse, not a student or instructor alone. This standard protects clients from errors by untrained personnel, aligning with nursing scope and institutional rules for accurate order execution.

Correct Answer: A

Rationale: Limiting bathing to once or twice weekly prevents further drying of already dry skin, preserving natural oils. Daily bathing, even without soap or with oil, risks exacerbation, and lotion isn't a bath substitute. Nurses apply this to maintain skin integrity.