Nokea
The nurse is evaluating a patients diagnosis of arterial insufficiency with reference to the adequacy of the patients blood flow. On what physiological variables does adequate blood flow depend?
- A. Efficiency of heart as a pump
- B. Adequacy of circulating blood volume
- C. Ratio of platelets to red blood cells
- D. Size of red blood cells
- E. Patency and responsiveness of the blood vessels
Correct Answer: A,B,E
Rationale: Adequate blood flow depends on the efficiency of the heart as a pump, the patency and responsiveness of the blood vessels, and the adequacy of circulating blood volume. Adequacy of blood flow does not primarily depend on the size of red cells or their ratio to the number of platelets.
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A nurse working in a long-term care facility is performing the admission assessment of a newly admitted, 85-year-old resident. During inspection of the residents feet, the nurse notes that she appears to have early evidence of gangrene on one of her great toes. The nurse knows that gangrene in the elderly is often the first sign of what?
- A. Chronic venous insufficiency
- B. Raynauds phenomenon
- C. VTE
- D. PAD
Correct Answer: D
Rationale: In elderly people, symptoms of PAD may be more pronounced than in younger people. In elderly patients who are inactive, gangrene may be the first sign of disease. Venous insufficiency does not normally manifest with gangrene. Similarly, VTE and Raynauds phenomenon do not cause the ischemia that underlies gangrene.
The nurse is providing care for a patient who has just been diagnosed with peripheral arterial occlusive disease (PAD). What assessment finding is most consistent with this diagnosis?
- A. Numbness and tingling in the distal extremities
- B. Unequal peripheral pulses between extremities
- C. Visible clubbing of the fingers and toes
- D. Reddened extremities with muscle atrophy
Correct Answer: B
Rationale: PAD assessment may manifest as unequal pulses between extremities, with the affected leg cooler and paler than the unaffected leg. Intermittent claudication is far more common than sensations of numbness and tingling. Clubbing and muscle atrophy are not associated with PAD.
The nurse is preparing to administer warfarin (Coumadin) to a client with deep vein thrombophlebitis (DVT). Which laboratory value would most clearly indicate that the patients warfarin is at therapeutic levels?
- A. Partial thromboplastin time (PTT) within normal reference range
- B. Prothrombin time (PT) eight to ten times the control
- C. International normalized ratio (INR) between 2 and 3
- D. Hematocrit of 32%
Correct Answer: C
Rationale: The INR is most often used to determine if warfarin is at a therapeutic level; an INR of 2 to 3 is considered therapeutic. Warfarin is also considered to be at therapeutic levels when the clients PT is 1.5 to 2 times the control. Higher values indicate increased risk of bleeding and hemorrhage, whereas lower values indicate increased risk of blood clot formation. Heparin, not warfarin, prolongs PTT. Hematocrit does not provide information on the effectiveness of warfarin; however, a falling hematocrit in a client taking warfarin may be a sign of hemorrhage.
The nurse is caring for a patient with a large venous leg ulcer. What intervention should the nurse implement to promote healing and prevent infection?
- A. Provide a high-calorie, high-protein diet.
- B. Apply a clean occlusive dressing once daily and whenever soiled.
- C. Irrigate the wound with hydrogen peroxide once daily.
- D. Apply an antibiotic ointment on the surrounding skin with each dressing change.
Correct Answer: A
Rationale: Wound healing is highly dependent on adequate nutrition. The diet should be sufficiently high in calories and protein. Antibiotic ointments are not normally used on the skin surrounding a leg ulcer and occlusive dressings can exacerbate impaired blood flow. Hydrogen peroxide is not normally used because it can damage granulation tissue.
A patient who has undergone a femoral to popliteal bypass graft surgery returns to the surgical unit. Which assessments should the nurse perform during the first postoperative day?
- A. Assess pulse of affected extremity every 15 minutes at first.
- B. Palpate the affected leg for pain during every assessment.
- C. Assess the patient for signs and symptoms of compartment syndrome every 2 hours.
- D. Perform Doppler evaluation once daily.
Correct Answer: A
Rationale: The primary objective in the postoperative period is to maintain adequate circulation through the arterial repair. Pulses, Doppler assessment, color and temperature, capillary refill, and sensory and motor function of the affected extremity are checked and compared with those of the other extremity; these values are recorded initially every 15 minutes and then at progressively longer intervals if the patients status remains stable. Doppler evaluations should be performed every 2 hours. Pain is regularly assessed, but palpation is not the preferred method of performing this assessment. Compartment syndrome results from the placement of a cast, not from vascular surgery.