Chapter 16: Caring for Clients with Fluid, Electrolyte, and Acid-Base Imbalances

The nurse is caring for a client with severe diarrhea. The nurse recognizes that the client is at risk for developing which acid-base imbalance?

Metabolic acidosis

Which is considered an isotonic solution?

0.9% normal saline

The weight of a client with congestive heart failure is monitored daily and entered into the medical record. In a 24-hour period, the client's weight increased by 2 lb. How much fluid is this client retaining?

1 L

A patient's serum sodium concentration is within the normal range. What should the nurse estimate the serum osmolality to be?

275-300 mOsm/kg

A patient complains of tingling in the fingers as well as feeling depressed. The nurse assesses positive Trousseau's and Chvostek's signs. Which decreased laboratory results does the nurse observe when the patient's laboratory work has returned?

Calcium

Treatment of FVE involves dietary restriction of sodium. Which of the following food choices would be part of a low-sodium diet, mild restriction (2 to 3 g/day)?

Three ounces of light or dark meat chicken, 1 cup of spaghetti and a garden salad

A client has a serum calcium level of 7.2 mg/dl (1.8 mmol/L). During the physical examination, the nurse expects to assess:

Trousseau's sign.

A client with emphysema is at a greater risk for developing which acid-base imbalance?

chronic respiratory acidosis

When evaluating arterial blood gases (ABGs), which value is consistent with metabolic alkalosis?

pH 7.48

Which could be a potential cause of respiratory acidosis?

Hypoventilation

The nurse is analyzing the arterial blood gas (ABG) results of a client diagnosed with severe pneumonia. Which of the following ABG results indicates respiratory acidosis?

pH: 7.20, PaCO2: 65 mm Hg, HCO3-: 26 mEq/

The nurse is caring for a client diagnosed with bulimia. The client is being treated for a serum potassium concentration of 2.9 mEq/L (2.9 mmol/L). Which statement made by the client indicates the need for further teaching?

"I can use laxatives and enemas but only once a week."

The nurse is instructing a client with recurrent hyperkalemia about following a potassium-restricted diet. Which statement by the client indicates the need for additional instruction?

"I will not salt my food; instead I'll use salt substitute."

A client is to receive hypotonic IV solution in order to provide free water replacement. Which solution does the nurse anticipate administering?

0.45% NaCl

Which solution is hypotonic?

0.45% NaCl

A client experiencing a severe anxiety attack and hyperventilating presents to the emergency department. The nurse would expect the client's pH value to be

7.50

Hypomagnesemia is a common yet often overlooked imbalance in acutely and critically ill patients. Which of the following patients is most likely at the highest risk of experiencing low serum magnesium levels?

A female patient who has liver cirrhosis and who is experiencing withdrawal from heavy alcohol use

When a client's ventilation is impaired, the body retains which substance?

Carbon dioxide

Which electrolyte is a major anion in body fluid?

Chloride

The nurse is caring for a client with a serum sodium concentration of 113 mEq/L (113 mmol/L). The nurse should monitor the client for the development of which condition?

Confusion

Before seeing a newly assigned client with respiratory alkalosis, a nurse quickly reviews the client's medical history. Which condition is a predisposing factor for respiratory alkalosis?

Extreme anxiety

One day after a client is admitted to the medical unit, the nurse determines that the client is oliguric. The nurse notifies the acute-care nurse practitioner who prescribes a fluid challenge of 200 mL of normal saline solution over 15 minutes. This intervention will achieve what goal?

Help distinguish reduced renal blood flow from decreased renal function

A client has the following arterial blood gas (ABG) values: pH, 7.12; partial pressure of arterial carbon dioxide (PaCO2), 40 mm Hg; and bicarbonate (HCO3-), 15 mEq/L. These ABG values suggest which disorder?

Metabolic acidosis

A patient is being treated with loop diuretics; gastric suctioning has been initiated. The nurse understands the patient is at risk for developing which of the following electrolyte imbalances?

Hypokalemia

An elderly client takes 40 mg of Lasix twice a day. Which electrolyte imbalance is the most serious adverse effect of diuretic use?

Hypokalemia

Oral intake is controlled by the thirst center, located in which of the following cerebral areas?

Hypothalamus

Which intervention is most appropriate for a client with an arterial blood gas (ABG) of pH 7.5, a partial pressure of arterial carbon dioxide (PaCO2) of 26 mm Hg, oxygen (O2) saturation of 96%, bicarbonate (HCO3-) of 24 mEq/L, and a PaO2 of 94 mm Hg?

Instruct the client to breathe into a paper bag.

A client hospitalized for treatment of a pulmonary embolism develops respiratory alkalosis. Which clinical findings commonly accompany respiratory alkalosis?

Light-headedness or paresthesia

The nurse is caring for a patient with diabetes type I who is having severe vomiting and diarrhea. What condition that exhibits blood values with a low pH and a low plasma bicarbonate concentration should the nurse assess for?

Metabolic acidosis

A client has been diagnosed with an intestinal obstruction and has a nasogastric tube set to low continuous suction. Which acid-base disturbance is this client at risk for developing?

Metabolic alkalosis

A priority nursing intervention for a client with hypervolemia involves which of the following?

Monitoring respiratory status for signs and symptoms of pulmonary complications.

A nurse in the neurologic ICU has received a prescription to infuse a hypertonic solution into a client with increased intracranial pressure. This solution will increase the number of dissolved particles in the client's blood, creating pressure for fluids in the tissues to shift into the capillaries and increase the blood volume. This process is best described as which of the following?

Osmosis and osmolality

A client is being treated in the ICU 24 hours after having a radical neck dissection completed. The client's serum calcium concentration is 7.6 mg/dL (1.9 mmol/L). Which physical examination finding is consistent with this electrolyte imbalance?

Presence of Trousseau sign

The nurse is caring for a client who has a peripheral IV in place for fluid replacement. When caring for the client's IV site, the nurse should:

ensure that the tubing is firmly anchored to the client's skin.

A client with cancer is being treated on the oncology unit for bilateral breast cancer. The client is undergoing chemotherapy. The nurse notes the client's serum calcium concentration is 12.3 mg/dL (3.08 mmol/L). Given this laboratory finding, the nurse should suspect that the

malignancy is causing the electrolyte imbalance.

Fluid and electrolyte balance is maintained through the process of translocation. What specific process allows water to pass through a membrane from a dilute to a more concentrated area?

osmosis

A client admitted with acute anxiety has the following arterial blood gas (ABG) values: pH, 7.55; partial pressure of arterial oxygen (PaO2), 90 mm Hg; partial pressure of arterial carbon dioxide (PaCO2), 27 mm Hg; and bicarbonate (HCO3-), 24 mEq/L. Based on these values, the nurse suspects:

respiratory alkalosis.

Which is a correct route of administration for potassium?

Oral

Which is the most common cause of symptomatic hypomagnesemia?

Alcoholism

A client with hypertension has been prescribed hydrochlorothiazide. What nursing action will best reduce the client's risk for electrolyte disturbances?

Ensure the client has sufficient potassium intake.

The nurse is caring for a client who is to receive IV daunorubicin, a chemotherapeutic agent. The nurse starts the infusion and checks the insertion site as per protocol. During the most recent check, the nurse observes that the IV has infiltrated so the nurse stops the infusion. What is the nurse's priority concern with this infiltration?

Extravasation of the medication

The surgical nurse is caring for a client who is postoperative day 1 following a thyroidectomy. The client reports tingling in her lips and fingers. She states that she has an intermittent spasm in her wrist and hand and she exhibits increased muscle tone. What electrolyte imbalance should the nurse first suspect?

Hypocalcemia

To compensate for decreased fluid volume (hypovolemia), the nurse can anticipate which response by the body?

Tachycardia

Early signs of hypervolemia include

increased breathing effort and weight gain.

Clients diagnosed with hypervolemia should avoid sweet or dry food because it:

increases the client's desire to consume fluid.

Following a unilateral adrenalectomy, a nurse should assess for hyperkalemia as indicated by:

muscle weakness.

The nurse is evaluating a newly admitted client's laboratory results, which include several values that are outside of reference ranges. Which of the following alterations would cause the release of antidiuretic hormone (ADH)?

Increased serum sodium

A client has a respiratory rate of 38 breaths/min. What effect does breathing faster have on arterial pH level?

Increases arterial pH

While assessing a client's peripheral IV site, the nurse observes edema around the insertion site. How should the nurse document this complication related to IV therapy?

Infiltration

A client with a suspected overdose of an unknown drug is admitted to the emergency department. Arterial blood gas values indicate respiratory acidosis. What should the nurse do first?

Prepare to assist with ventilation.

A nurse is caring for a client admitted with a diagnosis of exacerbation of myasthenia gravis. Upon assessment of the client, the nurse notes the client has severely depressed respirations. The nurse would expect to identify which acid-base disturbance?

Respiratory acidosis

A patient in the ICU starts complaining of being "short of breath." An arterial blood gas (ABG) is drawn. The ABG has the following values: pH = 7.21, PaCO2 = 64 mm Hg, HCO3 = 24 mm Hg. What does the ABG reflect?

Respiratory acidosis

A client has been admitted to the hospital unit with signs and symptoms of hypovolemia; however, the client has not lost weight. The client exhibits a localized enlargement of her abdomen. What condition could the client be presenting?

third-spacing

Which of the following is the most common cause of symptomatic hypomagnesemia in the United States?

Alcoholism

A patient with a diagnosis of colon cancer has undergone a bowel resection with the creation of an ileostomy. The patient's ileostomy output has been unexpectedly high in the 2 days since surgery, and the patient's most recent blood work indicates a K+ level of 2.7 mEq/L. This potassium level should prompt the nurse to assess for which of the following physical manifestations?

Fatigue, cramps, and weakness

Potassium can be administered by which of the following forms? Select all that apply.

IV Tablet Elixir

A client has questioned the nurse's administration of IV normal saline, asking, "Wouldn't sterile water would be a more appropriate choice than saltwater?" Under what circumstances would the nurse administer electrolyte-free water intravenously?

Never, because it rapidly enters red blood cells, causing them to rupture.