HESI LPN
Medical Surgical HESI
1. Which additional congenital malformation is expected in 80% of infants with a myelomeningocele?
- A. Cerebral palsy
- B. Hydrocephalus
- C. Meningitis
- D. Neuroblastoma
Correct answer: B
Rationale: Hydrocephalus is the additional congenital malformation expected in 80% of infants with a myelomeningocele. Myelomeningocele is commonly associated with hydrocephalus due to the abnormal accumulation of cerebrospinal fluid in the brain. Cerebral palsy (Choice A) is a motor disorder but not typically associated with myelomeningocele. Meningitis (Choice C) is an infection of the meninges and is not a congenital malformation. Neuroblastoma (Choice D) is a type of cancer that originates in immature nerve cells and is not a typical association with myelomeningocele.
2. A young adult client, admitted to the emergency department following a motor vehicle collision, is transfused with 4 units of PRBCs. The client’s pretransfusion hematocrit is 17%. Which hematocrit value should the nurse expect the client to have after all PRBCs have been transfused?
- A. 23%
- B. 25%
- C. 27%
- D. 29%
Correct answer: D
Rationale: One unit of PRBCs typically raises the hematocrit by 3%. Since the client received 4 units, the hematocrit is expected to increase by approximately 12% (4 units x 3% per unit). Therefore, the nurse should expect the client's hematocrit to be 29% after all PRBCs have been transfused. Choices A, B, and C are incorrect as they do not account for the cumulative effect of multiple PRBC units on the hematocrit level.
3. A middle-aged man who has a 35-year smoking history presents to the emergency department confused and short of breath. Before starting oxygen, these baseline arterial blood gases (ABGs) are obtained: pH=7.25, pCO2=50 mmHg, HCO3=30 mEq/L. These findings indicate to the nurse that the client is experiencing which acid-base imbalance?
- A. Metabolic acidosis.
- B. Respiratory acidosis.
- C. Metabolic alkalosis.
- D. Respiratory alkalosis.
Correct answer: B
Rationale: The ABG results show a low pH (acidosis) and increased pCO2, indicating respiratory acidosis. In respiratory acidosis, the lungs cannot remove enough CO2, leading to its accumulation in the blood. This often occurs in conditions like COPD and is consistent with the patient's smoking history. Metabolic acidosis (choice A) is characterized by low pH and low HCO3 levels. Metabolic alkalosis (choice C) is marked by high pH and high HCO3 levels. Respiratory alkalosis (choice D) presents with high pH and low pCO2.
4. What is the most effective therapy for maintaining remission of acute lymphoblastic leukemia in a child?
- A. Surgery to remove enlarged lymph nodes
- B. Long-term chemotherapy
- C. Nutritional supplements to enhance blood cell production
- D. Blood transfusions to replace ineffective red cells
Correct answer: B
Rationale: The correct answer is B: Long-term chemotherapy. In the case of acute lymphoblastic leukemia, the most effective approach for maintaining remission is long-term chemotherapy, particularly with methotrexate, a chemotherapeutic agent. Surgery to remove enlarged lymph nodes (choice A) is not the primary treatment for leukemia. Nutritional supplements (choice C) may be beneficial for overall health but are not the mainstay of leukemia treatment. Blood transfusions (choice D) are used to manage anemia in leukemia but do not address the underlying disease process.
5. Twelve hours following a unilateral total knee replacement, a client reports being unable to sleep because of severe incisional pain. What is the best initial nursing action?
- A. Administer a prescribed sedative.
- B. Reposition the client for comfort.
- C. Apply ice packs to the surgical site.
- D. Instruct the client in the use of the prescribed patient-controlled analgesia (PCA) pump.
Correct answer: D
Rationale: Instructing the client in the use of the PCA pump is the best initial nursing action for managing severe incisional pain after knee replacement surgery. The PCA pump allows the client to self-administer pain medication effectively, promoting better pain management. Administering a sedative may mask the pain temporarily but doesn't address the root cause. Repositioning the client for comfort or applying ice packs may provide some relief but doesn't address the need for effective pain control as the PCA pump does.
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