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 ["A","B","C","D"]
Explanation
A. Asking about travel outside the United States helps identify potential exposure to infections that are more prevalent in certain areas.
B. Assessing handwashing techniques is crucial, as proper hand hygiene is a fundamental way to prevent infections.
C. Understanding the patient's perception of infection risk in their home environment can highlight potential areas for intervention.
D. Knowing the signs and symptoms of infection allows the nurse to evaluate the patient’s awareness and ability to recognize early signs of infection.
E. While mobility can affect overall health, it is not directly related to assessing the risk of infection.
F. Knowing who runs errands may provide context for the patient's support system, but it does not directly assess infection risk.
Correct Answer is ["A","D"]
Explanation
A. Turning the clean pillowcase inside out over the hand holding it helps avoid contamination and allows easy application.
B. Soiled linens should be kept away from the nurse's uniform to prevent cross-contamination; hence, this is incorrect.
C. Sterile gloves are not required for bed-making; clean gloves may be used when handling soiled linens.
D. A modified mitered corner keeps the bed neat and helps secure the sheet, blanket, and spread.
E. Advising the patient of a lump when rolling over is not necessary for bed making, as the goal is to provide comfort without lumps.