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WorksheetsElectrolytes HY #3
Total questions: 22
Worksheet time: 13mins
Which of the following is not a role for calcium?
Bone and tooth metabolism
Collagen formation
Platelet aggregation
Regulation of pancreatic insulin release
You receive the labs for a patient and see that their sodium is 115 mEq/L, and glucose is 340 mg/dL. What is the estimation of this patient's true sodium concentration?
110 mEq/L
120 mEq/L
130 mEq/L
140 mEq/L
Which of the following can be observed in a patient presenting with hypokalemia?
Myalgia
Hyperreflexia
Peaking of T waves
Tetany
You have a patient with impaired renal function, and you want to assess their electrolyte status based on today's labs. What potassium level generally denotes a patient who has hyperkalemia?
>2.5 mEq/L
>3.5 mEq/L
>4.5 mEq/L
>5.5 mEq/L
Which of the following can cause hypokalemia? (Select ALL that apply.)
Albuterol
Stable Type 2 Diabetes
Extensive 2nd or 3rd degree burns
Losartan
Which of the following is not a common etiology for the development of hypocalcemia?
Diminished intake
Hypoparathyroidism
Multiple myeloma
Vitamin D deficiency
A patient presents with euvolemic hyponatremia from the syndrome of inappropriate antidiuretic hormone secretion (SIADH). Which class of medications can cause SIADH? (Select ALL that apply.)
Aminoglycosides
Angiotensin receptor blockers
Narcotics
Selective serotonin reuptake inhibitors
Which of the following can cause hypernatremia? (Select ALL that apply.)
Adrenal gland impairment
excessive perspiration
prolonged vomiting
severe burns
Which of the following signs and symptoms could be seen in a pregnant patient receiving high-dose magnesium sulfate for preeclampsia with severe features experiencing hypermagnesemia? (Select ALL that apply.)
Changes in cardiac condition
Decreased reflexes
Tachycardia
Mental status changes
A patient presents with hyperkalemia and is found to have a classic widening QRS and peaked T-waves on his 12-lead ECG. The clinician prescribes calcium gluconate. Which of the following most accurately describes the mechanism of action of calcium gluconate?
Activate Na+/K+ ATPase pump
Causes exchange of H+ for K+
Exchanges Na+ for K+ in the large intestine
Stabilize the cardiac membrane
Which of the following electrolytes has a normal range of 135-145 mEq/L in the serum?
Calcium
Magnesium
Potassium
Sodium
Where in the nephron is the last chance to concentrate the urine and increase free water absorption?
Collecting duct
Distal convoluted tubule
Proximal renal tubule
Thick ascending limb
Which of the following medications is most likely to cause SIADH (syndrome of inappropriate antidiuretic hormone) leading to euvolemic hyponatremia?
cyclophosphamide
fluvoxamine
cidofovir
venlafaxine
Which of the following is a common symptom of hypokalemia?
Hypertension
Increased insulin release
Increased reflexes
Skeletal muscle weakness
Which of the following electrolytes should be administered via a central line?
Calcium chloride
Calcium cluconate
Potassium
Sodium
Why is hyperkalemia common in patients with chronic kidney disease (CKD)?
Decreased aldosterone activity
Decreased renin release
Impaired potassium excretion
Increased muscle contraction
You are seeing a 32-year-old female whom you were told had finished a marathon and was reported to be behaving normally at the finish but became lost in the crowd, with family unable to find her until 2 hours later when she was found lost, altered, confused, and agitated. Which of the following is highest on the differential diagnosis?
Hyponatremia
Hypernatremia
Hypokalemia
Rhabdomyolysis
Euvolemic hyponatremia is commonly seen in which of the following medical conditions? (Select ALL that apply.)
Chronic kidney disease
Heart failure
Hypothyroidism
Syndrome of inappropriate antidiuretic hormone secretion (SIADH)
A patient who is being treated for Addison's disease presents to the pharmacy with a prescription for prednisone. Which of the following is NOT important patient counseling information?
Adverse effects of prednisone
Consequences of missing doses of prednisone
Expected outcome of treatment
Required laboratory test to determine appropriate dosing
Which best reflects the definition of homeostasis?
A solute passes through a membrane, leaving a solution of higher concentration to a solution of higher concentration, thereby balancing the solutes on either side of the membrane.
Ions and molecules in a solution spread out for uniform distribution
The body maintains a balance of fluid to molecules, including electrolytes
A liquid or gas passes through a membrane by forces of pressure
A patient presents with a potassium level of 2.2 mEq/L and U waves on his ECG. Which route of administration for potassium replacement is most appropriate for this patient?
Intramuscularly
Intravenously over an hour
Intravenously over five minutes
Orally
A 53-year-old female was sent over by her primary care physician due to an electrolyte abnormality. Upon initial assessment and history, it is discovered that the patient has end stage renal disease, is on hemodialysis three times per week, and has missed the last two weeks. She is awake, alert, and oriented, with normal vital signs and a bedside glucose measurement of 474 mg/dL. Initial chemistry reports the following results: Na 132 mmol/L, K 7.1 mmol/L, CO2 23 mmol/L, Cl 108 mmol/L, BUN 25 mg/dL Scr 11.2 mg/dL, Glucose 525 mg/dL. The current 12-lead ECG shows some widening of the QRS complex. Which of the following is the most appropriate? (Select all that apply)
Calcium gluconate IV 3 g
Dextrose 10% water IV 250 mL
Insulin regular IV 5 units
Furosemide IV 40 mg
