Exam 4 Flashcards
Which of the following patients is at the highest risk for hyperosmolar hyperglycemic syndrome?
a. An 18-year-old college student with type 1 diabetes who exercises excessively
b. A 45-year-old woman with type 1 diabetes who forgets to take her insulin in the morning
c. A 75-year-old man with type 2 diabetes and coronary artery disease who has recently started on insulin injections
d. An 83-year-old, long-term care resident with type 2 diabetes and advanced Alzheimer’s disease who recently developed influenza
Chapter 18 #2
d. An 83-year-old, long-term care resident with type 2 diabetes and advanced Alzheimer’s disease who recently developed influenza
Hyperosmolar hyperglycemic syndrome is more common in type 2 diabetes; influenza is a stressor that would result in further increases in blood sugar. Some individuals with advanced Alzheimer’s disease cannot communicate thirst needs and may be incontinent, making hypertonic fluid loss more difficult to estimate. Uncontrolled type 1 diabetes is associated with diabetic ketoacidosis. Interruption of insulin delivery related to a missed insulin dose in type 1 diabetes creates a situation of absolute insulin deficiency in type 1 diabetes and is associated with diabetic ketoacidosis. A patient with type 2 diabetes who is new to insulin is at risk for hypoglycemia.
The nurse is assigned to care for a patient who presented to the emergency department with diabetic ketoacidosis. A continuous insulin intravenous infusion is started, and hourly bedside glucose monitoring is ordered. The targeted blood glucose value after the first hour of therapy is:
a. 70 to 120 mg/dL.
b. a decrease of 25 to 50 mg/dL compared with admitting values.
c. a decrease of 50 to 75 mg/dL compared with admitting values.
d. less than 200 mg/dL.
Chapter 18 #5
c. a decrease of 50 to 75 mg/dL compared with admitting values.
Initial insulin infusions should be administered with a target blood glucose reduction of 50 to 75 mg/dL per hour. Decreases of less than this rate may be associated with inadequate insulin replacement and allow for the persistence of the ketotic state. Rapid reductions of blood glucose may precipitate life-threatening cerebral edema; thus, controlled reduction of glucose is required.
A 32-year-old patient is admitted to the critical care unit with a diagnosis of diabetic ketoacidosis. Following aggressive fluid resuscitation and intravenous (IV) insulin administration, the blood glucose begins to normalize. In addition to glucose monitoring, which of the following electrolytes requires close monitoring?
a. Calcium
b. Chloride
c. Potassium
d. Sodium
Chapter 18 #10
c. Potassium
Potassium must be closely monitored. In the early stages of diabetic ketoacidosis and hyperosmolar hyperglycemic syndrome, the potassium value is often high, but it may lower to critical levels once fluid balance has been restored and glucose has returned to more normal levels. Insulin administration used in the treatment of diabetic ketoacidosis further promotes lowering of potassium as the electrolyte is relocated to the cellular bed. Calcium levels do not drastically change in hyperosmolar states and are not a primary concern unless phosphate replacement is initiated. Chloride levels typically follow sodium levels and normalize with fluid replacement. Sodium levels may initially be elevated as a result of dehydration but will be corrected with fluid replacement.
The nurse is caring for a 27-year-old patient with a diagnosis of head trauma. The nurse notes that the patient’s urine output has increased tremendously over the past 18 hours. The nurse suspects that the patient may be developing:
a. diabetes insipidus.
b. diabetic ketoacidosis.
c. hyperosmolar hyperglycemic syndrome.
d. syndrome of inappropriate secretion of antidiuretic hormone.
Chapter 18 #7
a. diabetes insipidus.
Diabetes insipidus results in large volumes of urine; dehydration and hypovolemia can result. Head trauma and resulting increased intracranial pressure are potential causes of diabetes insipidus. High urine output following head trauma is associated with diabetes insipidus. Even though hyperosmolar hyperglycemic syndrome results in osmotic diuresis, the cause is a deficiency in insulin in type 2 diabetes, not head trauma. SIADH may occur with head trauma but results in reduced urine output and, potentially, hypervolemia.
An individual with type 2 diabetes who takes glipizide (Glucotrol) to control her blood glucose has begun a formal exercise program at a local gym. While exercising on the treadmill, she becomes pale, diaphoretic, and shaky. She has a headache and feels as though she is going to pass out. What is the individual’s priority action?
a. drink additional water to prevent dehydration
b. Eat something with 15 g of simple carbohydrates.
c. Go to the first aid station to have glucose checked.
d. Take another dose of the oral agent.
Chapter 18 #14
b. Eat something with 15 g of simple carbohydrates.
The patient is displaying classic symptoms of hypoglycemia. The patient is on sulfonylurea therapy, which carries the risk of hypoglycemia. The walking may be more exercise than she is used to and may thereby cause hypoglycemia. Fifteen grams of carbohydrate is appropriate for initial management of hypoglycemia. Hypoglycemia does not place the patient at risk for dehydration. The patient requires immediate treatment and could pass out while going to the first aid station. It cannot be assumed that the gym has access to diabetes treatment supplies. Additional doses of oral diabetes medications should not be taken without consulting the healthcare team. An additional dose of glipizide could promote further hypoglycemia.
In the management of diabetic ketoacidosis and hyperosmolar hyperglycemic syndrome, when is an intravenous (IV) solution that contains dextrose started?
a. Never; normal saline is the only appropriate solution in diabetes management
b. When the blood sugar reaches 70 mg/dL
c. When the blood sugar reaches 150 mg/dL
d. When the blood glucose reaches 250 mg/ dL
Chapter 18 #9
d. When the blood glucose reaches 250 mg/ dL
Normal saline is the best initial fluid choice for management of hyperglycemic states. However, when the glucose reaches about 250 mg/dL, solutions containing dextrose are added to prevent hypoglycemia. Hypotonic solutions are required to replace intracellular fluid deficits, and dextrose is required to prevent hypoglycemia later when glucose levels reach initial targets. A glucose level of 70 mg/dL is suggestive of hypoglycemia and would require oral glucose replacement, a 50% dextrose bolus, or glucagon administration.
An elderly female patient has presented to the emergency department with altered mental status, hypothermia, and clinical signs of heart failure. Myxedema is suspected. Which of the following laboratory findings support this diagnosis?
a. Elevated adrenocorticotropic hormone
b. Elevated cortisol levels
c. Elevated T3 and T4
d. Elevated thyroid-stimulating hormone
Chapter 18 #19
d. Elevated thyroid-stimulating hormone
Thyroid hormones are low in myxedema. Thyroid-stimulating hormone is usually high in relation to the feedback mechanisms for hormone regulation if myxedema is caused by primary hypothyroidism. Elevated adrenocorticotropic hormone may be seen in pituitary conditions or adrenal insufficiency. Elevated cortisol levels accompany Cushing’s syndrome. Elevated T3 and T4 levels are consistent with hyperthyroidism.
A patient presents to the emergency department with suspected thyroid storm. The nurse should be alert to which of the following cardiac rhythms while providing care to this patient?
a. Atrial fibrillation
b. Idioventricular rhythm
c. Junctional rhythm
d. Sinus bradycardia
Chapter 18 #18
a. Atrial fibrillation
Increased heart rate and tachydysrhythmia, including atrial fibrillation, may accompany thyroid storm. Bradycardiac rhythms may be suggestive of hypothyroidism.
The nurse admits a patient to the critical care unit following a motorcycle crash. Assessment findings by the nurse include blood pressure 100/50 mm Hg, heart rate 58 beats/min, respiratory rate 30 breaths/min, and temperature of 100.5°. The patient is lethargic, responds to voice but falls asleep readily when not stimulated. Which nursing action is most important to include in this patient’s plan of care?
a. Frequent neurological assessments
b. Side to side position changes
c. Range of motion to extremities
d. Frequent oropharyngeal suctioning
Chapter 13 #1
a. Frequent neurological assessments
Nurses complete neurological assessments based on ordered frequency and the severity of the patient’s condition. The newly admitted patient has an altered neurological status so frequent neurological assessments are most important to include in the patient’s plan of care. Side to side position changes, range of motion exercises, and frequent oral suctioning are nursing actions that may need to be a part of the patient’s plan of care but in the setting of increased intracranial pressure should not be regularly performed unless indicated.
While caring for a patient with a basilar skull fracture, the nurse assesses clear drainage from the patient’s left naris. What is the best nursing action?
a. Have the patient blow the nose until clear.
b. Insert bilateral cotton nasal packing.
c. Place a nasal drip pad under the nose.
d. suction the left nares until the drainage clears
Chapter 13 #5
c. Place a nasal drip pad under the nose.
In the presence of suspected cerebrospinal fluid leak, drainage should be unobstructed and free flowing. Small bandages may be applied to allow for fluid collection and assessment. Patients should be instructed not to blow their nose because that action may further aggravate the dural tear. Suction catheters should be inserted through the mouth rather than the nose to avoid penetrating the brain due to the dural tear.
The nurse is caring for a patient admitted to the ED following a fall from a 10-foot ladder. Upon admission, the nurse assesses the patient to be awake, alert, and moving all four extremities. The nurse also notes bruising behind the left ear and straw- colored drainage from the left nare. What is the most appropriate nursing action?
a. Insert bilateral ear plugs.
b. Monitor airway patency.
c. Maintain neutral head position.
d. Apply a small nasal drip pad.
Chapter 13 #11
d. Apply a small nasal drip pad.
Patient assessment findings are indicative of a skull fracture. The presence of straw- colored nasal draining may be indicative of a CSF leak. Drainage should be monitored and allowed to flow freely. Application of a nasal drip pad is the most appropriate action. Monitoring airway patency and maintaining the head in a neutral position are not priorities in a patient who is awake and alert. Insertion of bilateral ear plugs is not standard of care.
The nurse is caring for a mechanically ventilated patient with a brain injury. Arterial blood gas values indicate a PaCO2 of 60 mm Hg. The nurse understands this value to have which effect on cerebral blood flow?
a. Altered cerebral spinal fluid production and reabsorption
b. Decreased cerebral blood volume due to vessel constriction
c. Increased cerebral blood volume due to vessel dilation
d. No effect on cerebral blood flow (PaCO2 of 60 mm Hg is normal)
Chapter 13 #8
c. Increased cerebral blood volume due to vessel dilation
Cerebral vessels dilate when PaCO2 levels increase, increasing cerebral blood volume. Cerebral vessels dilate when CO2 levels increase, increasing cerebral blood volume. To compensate for increased cerebral blood volume, cerebral spinal fluid may be displaced, but the scenario is asking for the effect of hypercarbia (elevated PaCO2) on cerebral blood flow. PaCO2 of 60 mm Hg is elevated, which would cause cerebral vasodilation and increased cerebral blood volume.
The nurse is caring for a mechanically ventilated patient admitted with a traumatic brain injury. Which arterial blood gas value assessed by the nurse indicates optimal gas exchange for a patient with this type of injury?
a. pH 7.38; PaCO2 55 mm Hg; HCO3 22 mEq/L; PaO2 85 mm Hg
b. pH 7.38; PaCO2 40 mm Hg; HCO3 24 mEq/L; PaO2 70 mm Hg
c. pH 7.38; PaCO2 35 mm Hg; HCO3 24 mEq/L; PaO2 85 mm Hg
d. pH 7.38; PaCO2 28 mm Hg; HCO3 26 mEq/L; PaO2 65 mm Hg
Chapter 13 #14
c. pH 7.38; PaCO2 35 mm Hg; HCO3 24 mEq/L; PaO2 85 mm Hg
Optimal gas exchange in a patient with increased intracranial pressure includes adequate oxygenation and ventilation of carbon dioxide. A pH of 7.38, PaCO2 of 35 mm Hg, and a
PaO2 of 85 mm Hg indicates both. PaCO2 values greater than normal (35-45) can lead to
cerebral vasodilatation and further increase cerebral blood volume and ICP. Carbon dioxide levels less than 35 mm Hg can lead to cerebral vessel vasoconstriction and ischemia. Adequate oxygenation of cerebral tissues is achieved by maintaining a PaO2 above 80 mm Hg.
While caring for a patient with a closed head injury, the nurse assesses the patient to be alert with a blood pressure 130/90 mm Hg, heart rate 60 beats/min, respirations 18 breaths/min, and a temperature of 102° F. To reduce the risk of increased intracranial pressure (ICP) in this patient, what is (are) the priority nursing action(s)?
a. Ensure adequate periods of rest between nursing interventions.
b. Insert an oral airway and monitor respiratory rate and depth.
c. Maintain neutral head alignment and avoid extreme hip flexion.
d. Reduce ambient room temperature and administer antipyretics.
Chapter 13 #12
d. Reduce ambient room temperature and administer antipyretics.
In this scenario, the patient’s temperature is elevated, which increases metabolic demands. Increases in metabolic demands increase cerebral blood flow and contribute to increased intracranial pressure (ICP). Cooling measures should be implemented. Insertion of an oral airway in an alert patient is contraindicated. While maintaining neutral head position and ensuring adequate periods of rest between nursing interventions are appropriate actions for patients with elevated ICP, treatment of the fever is of higher priority.
The nurse is caring for a patient 5 days following clipping of an anterior communicating artery aneurysm for a subarachnoid hemorrhage. The nurse assesses the patient to be more lethargic than the previous hour with a blood pressure 95/50 mm Hg, heart rate 110 beats/min, respiratory rate 20 breaths/min, oxygen saturation (SpO2) 95%
on 3 L/min oxygen via nasal cannula, and a temperature of 101.5° F. Which physician order should the nurse institute first?
a. Blood cultures (2 specimens) for temperature > 101° F
b. Acetaminophen (Tylenol) 650 mg per rectum
c. 500 mL albumin infusion intravenously
d. Decadron 20 mg intravenous push every 4 hours
Chapter 13 #22
c. 500 mL albumin infusion intravenously
Cerebral vasospasm is a life-threatening complication following subarachnoid hemorrhage. Once an aneurysm has been repaired surgically, blood pressure is allowed to rise to prevent vasospasm. Volume expansion with 500 mL albumin is the priority intervention for a blood pressure of 95/50 mm Hg to prevent vasospasm and ensure cerebral perfusion. Blood cultures, acetaminophen administration, and Decadron are appropriate to include in the plan of care but are not priorities in this scenario.
The nurse is caring for a patient admitted with a subarachnoid hemorrhage following surgical repair of the aneurysm. Assessment by the nurse notes blood pressure 90/60 mm Hg, heart rate 115 beats/min, respiratory rate 28 breaths/min, oxygen saturation (SpO2) 99% on supplemental oxygen at 3L/min by cannula, a Glasgow Coma
Score of 4, and a central venous pressure (CVP) of 2 mm Hg. After reviewing the physician orders, which order is of the highest priority?
a. Lasix 20 mg intravenous push as needed
b. 500 mL albumin intravenous infusion
c. Decadron 10 mg intravenous push
d. Dilantin 50 mg intravenous push
Chapter 13 #29
b. 500 mL albumin intravenous infusion
To ensure adequate cerebral perfusion, for a CVP of 2 mm Hg, blood pressure of 90/60 mm Hg, and heart rate of 115 beats/min, an infusion of 500 mL of albumin is most appropriate. Lasix is contraindicated in low volume states. Although Decadron and Dilantin are appropriate medications, in this scenario, they are not the priority medications.
The nurse is caring for a patient admitted to the emergency department in status epilepticus. Vital signs assessed by the nurse include blood pressure 160/100 mm Hg, heart rate 145 beats/min, respiratory rate 36 breaths/min, oxygen saturation (SpO2)
96% on 100% supplemental oxygen by non-rebreather mask. After establishing an intravenous (IV) line, which order by the physician should the nurse implement first?
a. Obtain stat serum electrolytes.
b. Administer lorazepam (Ativan).
c. Obtain stat portable chest x-ray.
d. Administer phenytoin (Dilantin).
Chapter 13 #25
b. Administer lorazepam (Ativan).
The nurse should administer lorazepam (Ativan) as ordered; lorazepam (Ativan) is the first-line medication for the treatment of status epilepticus. Phenytoin (Dilantin) is administered only when lorazepam fails to stop seizure activity or if intermittent seizures persist for longer than 20 minutes. Serum electrolytes and chest x-rays are appropriate orders but not the priority in this scenario.
The nurse has just received a patient from the emergency department with an admitting diagnosis of bacterial meningitis. To prevent the spread of nosocomial infections to other patients, what is the best action by the nurse?
a. Implement droplet precautions upon admission.
b. Wash hands thoroughly before leaving the room.
c. Scrub the hub of all central line ports prior to use.
d. Dispose of all bloody dressings in biohazard bags.
Chapter 13 #31
a. Implement droplet precautions upon admission.
Droplet precautions are maintained for a patient with bacterial meningitis until 24 hours after the initiation of antibiotic therapy to reduce the potential for spread of the infection.
Washing hands and scrubbing the hub of injection ports are practices that help reduce the risk of infection, but added precautions are necessary for preventing the spread of bacterial meningitis. Disposing all bloody dressings in biohazard bags is a standard universal precaution and is not specific to bacterial meningitis.
The nurse is caring for a patient admitted with bacterial meningitis. Vital signs assessed by the nurse include blood pressure 110/70 mm Hg, heart rate 110 beats/min, respiratory rate 30 breaths/min, oxygen saturation (SpO2) 95% on supplemental oxygen
at 3 L/min, and a temperature 103.5° F. What is the priority nursing action?
a. Elevate the head of the bed 30 degrees.
b. Keep lights dim at all times.
c. Implement seizure precautions.
d. Maintain bedrest at all times.
Chapter 13 #32
c. Implement seizure precautions.
Bacterial meningitis is an infection of the pia and arachnoid layers of the meninges and the cerebrospinal fluid (CSF) in the subarachnoid space. As such, the patient can experience symptoms associated with cerebral irritation such photophobia and seizures. In addition, the patient is at increased risk for seizures because of a high temperature. The priority nursing action is to implement seizure precautions in an attempt to prevent injury. Elevating the head of the bead, keeping the lights dim, and maintaining bedrest are all appropriate nursing interventions but are not the priorities in this scenario.
A patient is having complications from abdominal surgery and remains NPO. Because enteral tube feedings are not possible, the decision is to initiate parenteral feedings. What are the major complications for this therapy?
a. Aspiration pneumonia and sepsis
b. Fluid and electrolyte imbalances and sepsis
c. Fluid overload and pulmonary edema
d. Hypoglycemia and renal insufficiency
Chapter 6 #1
b. Fluid and electrolyte imbalances and sepsis
Because of the high dextrose concentration, including the fluid and electrolyte content, the patient is placed at high risk for sepsis and fluid and electrolyte imbalances. Aspiration pneumonia is a potential complication of enteral feedings; sepsis is a potential complication of parenteral nutrition. Fluid overload is possible but unlikely and is not a major complication of parenteral nutrition. Hyperglycemia is more of a concern than hypoglycemia with parenteral nutrition; however, renal insufficiency is not related to parenteral nutrition.
A patient with acute pancreatitis is started on parenteral nutrition. The student nurse listed possible interventions for this patient. Which intervention needs correction before finalizing the plan of care?
a. Change the intravenous tubing every 24 hours.
b. Infuse antibiotics through the intravenous line.
c. Monitor the blood glucose every 6 hours.
d. Monitor the fluid and electrolyte balance.
Chapter 6 #11
b. Infuse antibiotics through the intravenous line.
Medications should not be infused through the IV line infusing parenteral nutrition.
A patient is receiving enteral tube feedings and has developed drug- nutrient interactions. The nurse recognizes which drug as having the potential for causing drug-nutrient reactions?
a. Aspirin
b. Enoxaparin
c. Ibuprofen
d. Phenytoin
Chapter 6 #13
d. Phenytoin
Bioavailability of phenytoin is reduced when administered with enteral feedings.