A patient has been diagnosed with heart failure and cardiac output is decreased. Which formula can the nurse use to calculate cardiac output?
Ventricular filling time/diastolic filling time
Stroke volume x heart rate
Myocardial contractility x myocardial blood flow
Preload/afterload
The Correct Answer is B
A. Ventricular filling time and diastolic filling time are not formulas used to calculate cardiac output; they pertain to the phases of the cardiac cycle.
B. Cardiac output is calculated by multiplying stroke volume (the amount of blood ejected by the heart with each beat) by heart rate (the number of beats per minute). This formula accurately reflects the overall volume of blood the heart pumps in one minute.
C. Myocardial contractility and myocardial blood flow are important factors in cardiac function but do not directly provide a formula for calculating cardiac output.
D. Preload and afterload are factors that affect stroke volume but are not used to calculate cardiac output directly.
Free Nursing Test Bank
- Free Pharmacology Quiz 1
- Free Medical-Surgical Quiz 2
- Free Fundamentals Quiz 3
- Free Maternal-Newborn Quiz 4
- Free Anatomy and Physiology Quiz 5
- Free Obstetrics and Pediatrics Quiz 6
- Free Fluid and Electrolytes Quiz 7
- Free Community Health Quiz 8
- Free Promoting Health across the Lifespan Quiz 9
- Free Multidimensional Care Quiz 10
View Related questions
Correct Answer is D
Explanation
A. Assessment has already been completed as the initial step, involving data collection.
B. Diagnosis is also completed, involving analysis and identification of the patient’s health problems.
C. Implementation occurs after planning, when nursing interventions are executed.
D. Planning is the appropriate next step, involving the creation of specific, measurable goals and interventions based on the identified nursing diagnoses.
Correct Answer is A
Explanation
A. After a nurse is exposed to blood from a cut by a used scalpel, it is crucial to test the patient for bloodborne pathogens (e.g., HIV, hepatitis B, hepatitis C) and to offer post-exposure prophylaxis or treatment to the nurse if indicated.
B. While removing gloves and disposing of them properly is part of standard infection control practices, it is not the primary process required after an exposure incident.
C. Although the nurse should report the incident, providing a medical evaluation should follow the protocols established by the facility, not just the manager's assessment.
D. Properly disposing of the scalpel in a sharps container is necessary for safety but does not directly address the required process for managing exposure to blood.