A nurse is preparing to administer potassium chloride 20 mEq. The amount available is potassium chloride liquid 40 mEq/15 mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["7.5"]
We can calculate the volume of potassium chloride solution to administer using the following steps:
Identify the prescribed dose: The nurse needs to administer 20 mEq of potassium chloride.
Identify the concentration of available solution: The potassium chloride liquid is available in a concentration of 40 mEq/15 mL. This means there are 40 milliequivalents (mEq) of potassium chloride in every 15 milliliters (mL) of the solution.
Set up a proportion to find the volume needed:
Desired dose (mEq) : Volume to administer (mL) = Concentration (mEq/mL)
Plug in the values:
20 mEq : Volume to administer (mL) = 40 mEq/15 mL
Solve for the volume:
To isolate the volume (mL), multiply both sides of the proportion by the volume unit (mL) and divide by the dose (mEq).
Volume to administer (mL) = (20 mEq) x (mL) / (40 mEq/15 mL)
We can simplify the calculation before dividing:
Volume to administer (mL) = (20 mEq x 15 mL) / 40 mEq
Volume to administer (mL) = 300 mL / 40 mEq
Volume to administer (mL) = 7.5 mL (round to one decimal place)
Therefore, the nurse should administer 7.5 mL of the potassium chloride solution.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A) Chill the otic solution prior to administration:
Chilling ear drops is not typically necessary or recommended. Cold solutions can cause discomfort or dizziness when instilled into the ear. Room temperature or slightly warmed ear drops are generally more comfortable for the client.
B) Pull the pinna upward and backward:
This is the correct action for administering ear drops to an adult client. Pulling the pinna (outer ear) upward and backward helps straighten the ear canal, allowing the drops to enter the ear canal properly.
C) Avoid applying pressure to the tragus of the ear:
The tragus is the small cartilaginous flap in front of the ear canal. Applying pressure to the tragus can help facilitate the flow of medication into the ear canal rather than avoiding it. Gently pressing on the tragus after instilling the drops can aid in distributing the medication.
D) Don sterile gloves to instill the medication:
Sterile gloves are not typically required for administering ear drops unless the nurse is dealing with a client with a compromised immune system or open ear canal. Standard precautions (clean hands) are usually sufficient for administering ear drops.
Correct Answer is D
Explanation
A) Shave excess hair from skin before applying a nitroglycerin patch:
Shaving excess hair is not necessary for applying a nitroglycerin patch. The patch should be applied to a clean, dry, and hairless area of skin to ensure proper adhesion and absorption of medication.
B) Keep a nitroglycerin patch in place 24 hr per day:
Nitroglycerin patches are typically worn for a specified period (usually 12 to 14 hours) and then removed for a "patch-free" interval to prevent tolerance development. Continuous use can lead to tolerance, reducing the effectiveness of the medication.
C) Put a second patch in place if angina pain occurs:
Applying a second nitroglycerin patch is not recommended without consulting a healthcare provider. Increasing the dosage of nitroglycerin without proper medical advice can lead to hypotension and other adverse effects. The client should follow the prescribed regimen and seek medical assistance if angina pain is not relieved.
D) Fold used patch with medication area to the inside and discard in a closed receptacle:
This is the correct instruction. Used nitroglycerin patches should be folded with the adhesive side together (medication area inside) to prevent accidental exposure and disposed of in a closed receptacle. This helps ensure safe disposal and prevents unintentional contact with the medication by others.
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