The ability of a screening test to distinguish correctly between persons with and without a disease is knows as _________.
- A. Reliability
- B. Validity
- C. Sensitivity
- D. Specificity
Correct Answer: B
Rationale: Validity refers to the extent to which a test accurately measures what it is intended to measure. In the context of screening tests for diseases, validity is crucial in assessing whether the test can correctly distinguish between individuals who have the disease (true positives) and those who do not have the disease (true negatives). This includes the ability to minimize false positives (incorrectly identifying someone as having the disease) and false negatives (incorrectly identifying someone as not having the disease). Therefore, when assessing the ability of a screening test to distinguish correctly between persons with and without a disease, we are essentially evaluating its validity.
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Nurse Addison provides instructions about measures to prevent postpartum mastitis who is breast feeding her newborn. Which of the following would indicate that the mother needs further instruction? "I Should _______."
- A. wash my hands wel1 before breastfeeding
- B. breastfeed every 2-3 hours
- C. change the breast pads frequently
- D. wash my nipples with s0ap and water prior to feeding 3 hours
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.
Which of the following nursing actions should the nurse TEACH the patient's care giver regarding tracheostomy care?
- A. Remove the tracheostomy tube if obstruction occurs
- B. Leave the tracheostomy ties in place until the physician change them
- C. Remove and clean the inner cannula daily
- D. Never put a covering over the tracheostomy stoma
Correct Answer: C
Rationale: Cleaning the inner cannula daily helps prevent the accumulation of secretions and debris, which can lead to blockages and infections. It is an essential aspect of tracheostomy care to maintain the patency of the airway and prevent complications. Caregivers should be taught how to safely remove, clean, and reinsert the inner cannula as part of routine tracheostomy care.
A 35-year-old woman presents with irregular menstrual cycles, hirsutism, and acne. Which of the following conditions is most likely to be associated with these symptoms?
- A. Polycystic ovary syndrome (PCOS)
- B. Endometriosis
- C. Ovarian cancer
- D. Uterine fibroids
Correct Answer: A
Rationale: Polycystic ovary syndrome (PCOS) is a common hormonal disorder in women of reproductive age. The classic symptoms of PCOS include irregular menstrual cycles, hirsutism (excess hair growth in a male pattern), and acne. Women with PCOS often have enlarged ovaries with multiple small cysts. Other common features include obesity, insulin resistance, and infertility. Endometriosis is characterized by the presence and growth of endometrial-like tissue outside the uterus, leading to symptoms such as pelvic pain and infertility. Ovarian cancer usually presents with nonspecific symptoms and is less likely in a young woman with these specific symptoms. Uterine fibroids are benign tumors that can cause heavy menstrual bleeding and pelvic pressure but are less likely to be associated with hirsutism and acne.
A patient with heart failure is prescribed digoxin. Which electrolyte imbalance increases the risk of digoxin toxicity?
- A. Hyperkalemia
- B. Hypernatremia
- C. Hypokalemia
- D. Hyponatremia
Correct Answer: C
Rationale: Hypokalemia (low levels of potassium) increases the risk of digoxin toxicity. This is because digoxin competes with potassium for binding sites on the sodium-potassium ATPase pump in the cell membrane. When potassium levels are low, there is an increased binding of digoxin to these pumps, leading to enhanced entry of calcium into the cells. This can result in an increased intracellular calcium concentration, leading to digoxin toxicity and potential cardiac arrhythmias. Therefore, monitoring and correcting potassium levels is crucial in patients prescribed digoxin to reduce the risk of toxicity.
Nurse Maris is correct in identifying whinch of the following is a health resource problem?
- A. Increase in number of deaths fromm Pneumonia
- B. Feud between Midwife andHead of t he Sanitation Committee
- C. Absence of midwife in the communtiy to render health services
- D. High Maternal Mortality Rate
Correct Answer: C
Rationale: The correct answer, C, reflects a health resource problem. The absence of a midwife in the community means that there is a lack of a critical health resource necessary for providing essential health services, especially for pregnant women and infants. This directly impacts the access to healthcare services and can contribute to negative health outcomes, such as high maternal mortality rates. The other options do not directly address a health resource problem but rather focus on specific issues or conflicts within the community.