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Med Surg Adaptive Quizzing and Rationale

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Med Surg Adaptive Quizzing and Rationale Phosphorus and calcium have inverse or reciprocal relationships, meaning that when calcium levels are high, phosphorus levels tend to be low. Therefore administration of phosphorus will reduce a patient's already abnormally low calcium level, which can result in life-threatening complications. Potassium phosphate will not have any effect on sodium, magnesium, or potassium levels. The nurse is caring for a patient admitted with an exacerbation of asthma. After several treatments, the arterial blood gas (ABG) results are pH 7.40, PaCO 2 40 mm Hg, HCO 3 24 mEq/L, PaO 2 92 mm Hg, and O 2 saturation 99%. What does the nurse interpret these findings to indicate? WNL The normal pH is 7.35 to 7.45. Normal PaCO 2 levels are 35 to 45 mm Hg, and normal HCO 3 levels are 22 to 26 mEq/L. A normal PaO 2 level is greater than 80 mm Hg. Normal oxygen saturation is greater than 95%. Because the patient's results all fall within these normal ranges, the nurse can conclude that the patient's blood gas results are within normal limits. The nurse admits a patient that states they have been unable to eat for 10 days and feel extremely weak and sick. When reviewing the arterial blood gas results, what condition does the nurse expect to find? metabolic acidosis Starvation leads to production of lactic acid from the cells, resulting in metabolic acidosis. Metabolic alkalosis is caused by severe vomiting, gastric suction, and diuretic therapy. Factors such as chest wall abnormality and chronic obstructive pulmonary disease may cause respiratory acidosis. Septicemia, hypoxia, and anxiety cause respiratory alkalosis. The nurse suspects which possible conditions in a patient whose serum potassium level is 6.8 mEq/L on admission? Select all that apply. The patient is on insulin therapy. The patient is taking amiloride daily. The patient suffers from renal disease. The patient's electrocardiogram reveals flattened T waves. The patient's orders will include intravenous fluids with added potassium. The patient is taking amiloride daily. The patient suffers from renal disease. Potassium levels greater than 5.0 mEq/mL indicated hyperkalemia. Potassium-sparing diuretics, such as amiloride, increase the potassium levels. The kidneys excrete potassium, so renal disease can also lead to increased potassium levels. Insulin moves potassium into the cell and decreases serum potassium values. Hyperkalemia is manifested on an electrocardiogram as tall, peaked T waves, not flattened T waves. Potassium should not be added to IV fluids if the patient is already suffering from hyperkalemia. The nurse is preparing to administer sodium polystyrene sulfonate rectally to a patient with an irregular pulse and weakness of the lower extremities. What laboratory finding does the nurse determine is the reason for this treatment? hyperkalemia Irregular pulse and weakness of the lower extremities are generally seen in patients with hyperkalemia. Sodium polystyrene sulfonate binds with potassium in exchange for sodium, thereby reducing hyperkalemia. Hypokalemia can be treated with potassium chloride. Hypocalcemia can be treated with calcium supplements. Hypercalcemia can be treated by administering furosemide. An older adult patient with dementia arrives in the emergency department with a family member; the patient is found to be hypercarbic. The patient has an advanced directive and does not want any invasive procedure. The family member asks if this issue will resolve by itself. Which is the nurse's most appropriate response? c) "Older adults have a harder time compensating because they have decreased respiratory and kidney functions." Hypercarbia is an increased level of CO 2 in the blood, which is a hallmark of respiratory acidosis. Older adults have difficulty compensating for acid-base imbalances because of decreased functional capacity in the respiratory and renal systems. Hyperventilation is a normal physiologic response to hypercarbia; hyperventilation may not be possible with decreased functional respiratory reserves. Normal kidneys can sense hypercarbia and begin to reabsorb buffer to normalize pH; however, older adults may lack the functional capacity or have some degree of kidney disease. Normal renal compensation is slow and will often begin in 24 hours, if kidney function is normal. The nurse is caring for a patient scheduled for surgery with a chest wall abnormality. Which condition should the nurse carefully monitor the client's arterial blood gases for? respiratory acidosis A chest wall abnormality may cause difficulty in breathing, leading to hypoventilation. Hypoventilation may result in respiratory acidosis. Metabolic acidosis is caused by factors that increase the concentration of acid other than carbonic acid. Metabolic alkalosis occurs as a result of factors contributing to the loss of bicarbonate or gain of acids. Respiratory alkalosis is caused by conditions which result in hyperventilation

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Med Surg Adaptive Quizzing and Rationale


The nurse is planning care for a patient with a new diagnosis of hypercalcemia resulting from treatment
for hypocalcemia. Which change to the plan of care should the nurse anticipate?

- weight bearing exercises



A patient with hypercalcemia as a result of treatment for hypocalcemia would require the addition of
weight-bearing exercises to the plan of care. These exercises will facilitate the movement of extra
calcium ions in the blood to the bone. Teaching the patient to breathe into a bag, administering calcium
gluconate, and administering a thiazide diuretic are all appropriate for hypocalcemia; therefore these
actions should be removed from the plan of care, not added



The nurse is caring for a group of patients. Which patient is at greatest risk for increased extracellular
fluid accumulation?

1.A patient with drainage from a rectal fistula

2.A patient with osmotic diuresis

3.A patient with renal impairment

4.A patient with an intestinal obstruction

3



Extracellular fluid accounts for one-third of total body fluids, which consist of interstitial fluid, plasma,
and transcellular fluid. The extracellular fluid may become excessive when the elimination of water is
impaired, especially during kidney failure. Conditions such as fistula drainage, osmotic diuresis, and
intestinal obstruction result in a loss of body fluid.



A patient asks why the primary health care provider prescribed a b-type natriuretic peptide (BNP).
Which response by the nurse is accurate?

1.It is a diagnostic procedure to rule out urine retention.

2.It is a blood test that is elevated in patients with hyponatremia.

3.It is a blood test that shows if there is excess fluid in the heart.

4.It is an x-ray that helps determine the presence of stomach ulcers.

3

,BNP is a hormone that is produced when the atrial pressure increases. This blood test is used to
diagnose the severity and treatment outcomes of congestive heart failure (CHF). The atrial pressure
increases because of increased venous return and hypernatremia. The test gives no information to rule
out urine retention or the presence of stomach ulcers. A serum sodium level is needed to determine
hyponatremia.



The nurse reviews the arterial blood gases for a patient that has taken an overdose of barbiturates. The
results are: pH 7.32; PaCO 2 52; HCO 3- 24. What does the nurse interpret these results to mean?

respiratory acidosis



Normal pH is 7.35 to 7.45. Values less than 7.35 indicate acidosis. Normal value for PaCO 2 is 35 to 45
mm Hg. Because the HCO 3- is normal and the PaCO 2 is elevated, the source of the acidosis is
respiratory. The patient is in respiratory acidosis.



The nursing instructor is discussing peripherally implanted catheters (PICC) with a nursing student.
Which nursing student statement would indicate a need for further teaching?

Blood pressure should not be taken on an arm with a PICC line because inflation of the cuff can lead to
the risk of vein damage or thrombosis. Nurses do need to check for phlebitis for up to 10 days after the
PICC is inserted. PICC lines are typically used for access for up to six months, and they can be left longer.
PICC lines have fewer side effects than central venous catheters.



The nurse is caring for a patient with acute kidney failure due to severe dehydration. When evaluation
of the arterial blood gases is done, what condition does the nurse likely interpret the findings to
indicate?

metabolic acidosis



Renal failure will make the blood more acidic because of the inability of the kidneys to excrete acid.
Therefore the nurse suspects that the patient would develop metabolic acidosis. Metabolic alkalosis is
caused by excess bicarbonate intake and a potassium deficit. Respiratory acidosis is caused by
hypoventilation. Respiratory alkalosis is caused by hyperventilation.



A patient has been admitted for dehydration. What is a priority nursing intervention?

, a) Perform daily weights.



b) Reorient the patient hourly.



c) Restrict sodium intake to 2 grams per day.



d) Provide continuous oxygen saturation monitoring

A



Measuring weight is the most reliable means of detecting changes in fluid balance. Weight loss would
indicate that the dehydration is worsening, whereas weight gain would indicate restoration of fluid
volume. The nurse would recall that a 1-kg weight gain indicates a gain of approximately 1000 mL of
body water. This patient is not disoriented, and that is not a common assessment finding in the patient
with dehydration. Continuous oxygen saturation monitoring is not indicated. Sodium intake does not
need to be restricted.



When assessing a patient admitted with nausea and vomiting, which finding supports a determination of
deficient fluid volume?

General restlessness



Restlessness is an early cerebral sign that dehydration has progressed to the point where an intracellular
fluid shift is occurring. If the dehydration is left untreated, cerebral signs could progress to confusion
and later coma. Polyuria, decreased pulse, and difficulty breathing do not support a determination of
deficient fluid volume.



A patient with cancer is found to have a serum phosphate level of 5.4 mg/dL. What does the nurse
determine is the probable reason for the increase in phosphate levels in this patient?




Chemotherapy



Insulin therapy

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