preload refers to

NCLEX-RN

NCLEX RN Exam Prep

1. What does preload refer to?

A. The volume of blood entering the left side of the heart
B. The volume of blood entering the right side of the heart
C. The pressure in the venous system that the heart must overcome to pump the blood
D. The pressure in the arterial system that the heart must overcome to pump the blood

Correct answer: B

Rationale: Preload refers to the volume of blood that enters the right side of the heart. This volume stretches the fibers in the heart before contraction. Preload is an essential factor in determining the force of ventricular contraction. Choices A, C, and D are incorrect. Choice A is incorrect because preload is specifically related to the volume of blood entering the right side of the heart. Choices C and D are incorrect as they refer to afterload, which is the pressure that the heart must overcome to pump blood out of the ventricles into the systemic or pulmonary circulation.

2. A patient's Foley catheter has been discontinued. You will dispose of this patient equipment by doing which of the following?

A. Wearing gloves and then placing this equipment in the regular trash can after it is placed in a paper bag.
B. Simply placing this equipment in the regular trash can after it is placed in a paper bag.
C. Wearing gloves and then placing this equipment into a special 'hazardous waste' container.
D. Simply placing this equipment in the 'hazardous waste' container after it is placed in a paper bag.

Correct answer: C

Rationale: When disposing of used patient equipment, such as a Foley catheter, that has come in contact with bodily fluids, it is considered hazardous waste. The correct procedure involves wearing gloves and placing the Foley bag and tubing into a special 'hazardous waste' container. This container is marked as 'Hazardous' and is typically red to indicate the potential danger of its contents. Placing the equipment in a regular trash can, even if placed in a paper bag, is not appropriate as it does not meet the standards for disposing of hazardous waste. Therefore, options A and B are incorrect. Similarly, simply placing the equipment in a 'hazardous waste' container after it is placed in a paper bag is also incorrect as direct disposal into the designated container while wearing gloves is the proper protocol, making option D incorrect.

3. Madge is a 91-year-old nursing home resident with a history of dementia and atrial fibrillation who has been admitted to the hospital for treatment of pneumonia. As you are performing her bed bath, you note bruising around her breasts and genital area. What potential issue should be of major concern in Madge's situation?

A. Idiopathic thrombocytopenic purpura (ITP)
B. Embolic stroke
C. Sexual abuse
D. Nursing home-acquired pneumonia (NHAP)

Correct answer: C

Rationale: Bruising around the breasts and genitals should trigger concern for sexual abuse. Elder abuse is a growing problem in America, and nurses are uniquely positioned to recognize and intervene on behalf of vulnerable populations, such as the elderly. According to the National Center on Elder Abuse (NCEA), major types of elder abuse include physical abuse, sexual abuse, emotional or psychological abuse, neglect, abandonment, financial or material exploitation, and self-neglect. In this scenario, given Madge's age, history of dementia, and the presence of unexplained bruising in sensitive areas, sexual abuse must be considered as a major concern. Idiopathic thrombocytopenic purpura (ITP) is a platelet disorder that presents with excessive bruising and bleeding, but it is less likely in this case as the bruising pattern is suggestive of a different cause. Embolic stroke is a neurological condition that typically presents with sudden onset neurological deficits and is not related to the observed bruising. Nursing home-acquired pneumonia (NHAP) is a common issue in elderly residents but would not manifest as bruising in specific areas like the breasts and genitals.

4. When taking blood pressures on a variety of people at a health fair, what should the nurse keep in mind?

A. After menopause, blood pressure readings in women are usually higher than those taken in men.
B. The blood pressure of an African-American adult is usually higher than that of a non-Hispanic White adult of the same age.
C. Blood pressure measurements in people who are overweight are usually higher than those of people who are at a normal weight.
D. A teenager's blood pressure reading may be lower than that of an adult.

Correct answer: B

Rationale: When assessing blood pressures, it is important to consider that the blood pressure of African-American adults is typically higher than that of non-Hispanic White adults of the same age. This is significant as Black individuals in the United States have a higher prevalence of hypertension compared to other groups. Blood pressure readings in women are generally higher than in men after menopause. Additionally, blood pressure measurements in overweight individuals are typically higher than those in individuals of normal weight. While teenagers may have lower blood pressure readings than adults, it is crucial to recognize the trend of a gradual rise in blood pressure throughout childhood and into adulthood. Therefore, the correct choice is B. Choices A, C, and D are incorrect as they do not reflect the typical blood pressure differences observed in various populations.

5. When printing out an EKG, a nurse notices that the QRS complexes are extremely small. What should be the next step?

A. Alert the physician immediately as this is a sign of impending cardiac arrest.
B. Check to see that all leads are attached and rerun the EKG.
C. Increase the sensitivity control to 20 mm deflection.
D. Decrease the run speed to 50.

Correct answer: C

Rationale: Increasing the sensitivity control to 20 mm deflection will double the sensitivity, allowing for better observation of the small QRS complexes. This step is crucial in obtaining a clearer EKG reading. Choice A is incorrect because small QRS complexes do not necessarily indicate impending cardiac arrest; it's more likely a technical issue. Choice B is not the first step to take when small QRS complexes are observed; it's important to adjust the settings first. Choice D is incorrect because decreasing the run speed to 50 is not the appropriate action for this situation; adjusting the sensitivity control is more relevant to improve the visualization of the complexes.