Nokea
Which of the following procedures always requires surgical asepsis?
- A. Vaginal instillation of conjugated estrogen
- B. Urinary catheterization
- C. Nasogastric tube insertion
- D. Colostomy irrigation
Correct Answer: B
Rationale: Surgical asepsis, which involves maintaining a sterile field and preventing contamination in a surgical setting, is required for urinary catheterization as it involves entering a sterile body cavity. Vaginal instillation of conjugated estrogen, nasogastric tube insertion, and colostomy irrigation do not always require surgical asepsis as they involve different levels of sterility and infection control measures.
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The physician orders the administration of high-humidity oxygen by face mask and placement of the patient in a high Fowler's position. After assessing Mrs. Paul, the nurse writes the following nursing diagnosis: Impaired gas exchange related to increased secretions. Which of the following nursing interventions has the greatest potential for improving this situation?
- A. Encourage the patient to increase her fluid intake to 200 ml every 2 hours
- B. Place a humidifier in the patient's room
- C. Continue administering oxygen by high humidity face mask
- D. Perform chest physiotherapy on a regular schedule
Correct Answer: D
Rationale: Chest physiotherapy is the most effective intervention in cases of impaired gas exchange related to increased secretions. This technique helps mobilize and clear secretions from the airways, thereby improving gas exchange in the lungs. Placing a humidifier or administering oxygen by high humidity face mask may provide moisture but may not directly address the clearance of secretions. Encouraging increased fluid intake can help with hydration but may not address the underlying issue of impaired gas exchange due to secretions.
Which of the following blood tests should be performed before a blood transfusion?
- A. Prothrombin and coagulation time
- B. Blood typing and cross-matching
- C. Bleeding and clotting time
- D. Complete blood count (CBC) and electrolyte levels
Correct Answer: B
Rationale: Before administering a blood transfusion, it is crucial to perform blood typing and cross-matching to ensure compatibility between the donor's blood and the recipient's blood. This process helps prevent adverse reactions such as transfusion reactions, which can be life-threatening. Prothrombin and coagulation time, bleeding and clotting time, as well as CBC and electrolyte levels are important tests in other clinical contexts, but for blood transfusions, blood typing and cross-matching are essential to ensure patient safety.
Which of the following statements about chest X-rays is false?
- A. There are contraindications for this test
- B. Before the procedure, the patient should remove all jewelry, metallic objects, and buttons above the waist
- C. A signed consent is not required
- D. Eating, drinking, and medications are allowed before this test
Correct Answer: A
Rationale: The correct answer is A because there are contraindications for chest X-rays, such as pregnancy or concerns about radiation exposure. Patients may need to remove jewelry and metallic objects to prevent interference with the imaging. While a signed consent is typically not required for a routine chest X-ray, there are specific situations where consent may be necessary. It is essential for patients to follow fasting instructions before certain types of chest X-rays to obtain accurate results.
What is the primary purpose of a platelet count?
- A. Assessing clot formation potential
- B. Assessing bleeding risk
- C. Detecting antigen-antibody response
- D. Identifying cardiac enzymes presence
Correct Answer: B
Rationale: A platelet count is primarily used to assess the risk of bleeding. Platelets play a crucial role in blood clotting, so a low platelet count can lead to an increased risk of bleeding. Monitoring platelet levels helps healthcare providers evaluate a patient's ability to form clots and manage bleeding.
Which of the following measures is not recommended to prevent pressure ulcers?
- A. Massaging the reddened area with lotion
- B. Using a water or air mattress
- C. Adhering to a schedule for positioning and turning
- D. Providing meticulous skin care
Correct Answer: A
Rationale: Massaging a reddened area can cause further tissue damage by increasing pressure on already compromised skin. The other options, such as using specialized mattresses, adhering to repositioning schedules, and maintaining good skin care, are all recommended strategies to prevent pressure ulcers by reducing pressure and friction on vulnerable areas of the skin.