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A client is ordered digoxin 0.25mg po. daily. On hand is a liquid in a dropper bottle labeled 500mcg/10mL. How many milliliters will be administered?
Answer and Explanation

The Correct Answer is ["5"]

Given:

Desired dose: Digoxin 0.25 mg PO daily

Available concentration: Digoxin 500 mcg/10 mL

 

To find:

Volume to administer (in mL)

 

Step 1: Convert desired dose to micrograms

We know that 1 milligram (mg) is equal to 1000 micrograms (mcg). Therefore, to convert the desired dose from mg to mcg, we multiply by 1000:

Desired dose (mcg) = Desired dose (mg)x 1000

Desired dose (mcg) = 0.25 mg x 1000 = 250 mcg

 

Step 2: Set up the proportion

We can use the following proportion to solve the problem:

(Desired dose) / (Available concentration) = Volume to administer

 

Step 3: Substitute the values

Plugging in the given values, we get:

(250 mcg) / (500 mcg/10 mL) = Volume to administer

 

Step 4: Simplify

To simplify, we can invert the denominator and multiply:

(250 mcg) x (10 mL / 500 mcg) = Volume to administer

The "mcg" units cancel out, leaving us with:

(250 x 10 mL) / 500 = Volume to administer

 

Step 5: Calculate

Performing the multiplication and division, we get:

2500/ 500 = Volume to administer

5 mL = Volume to administer


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Related Questions

Correct Answer is ["A","C","E"]

Explanation

A) Presence of a two-vessel umbilical cord:
The presence of a two-vessel umbilical cord (instead of the normal three vessels, which includes two arteries and one vein) is a significant finding that requires follow-up. A two-vessel cord can be associated with fetal anomalies, particularly with renal, cardiac, or chromosomal conditions. Therefore, it requires further evaluation to rule out any underlying conditions and ensure proper organ development.

B) Molding of the skull:
Molding of the skull is a normal and expected finding in newborns following a vaginal birth, especially after a long or difficult delivery. It refers to the temporary reshaping of the fetal skull bones as they overlap to pass through the birth canal. This is typically self-correcting and resolves within a few days, so no follow-up is needed for molding.

C) Asymmetry of ears:
Asymmetry of the ears can indicate congenital anomalies, such as craniofacial syndromes or other physical deformities. Although some degree of asymmetry can occur in newborns, especially in the first hours of life, persistent or significant asymmetry should be evaluated further. It may indicate an abnormality that requires follow-up or assessment by a specialist.

D) Tongue extending past the lower lip:
A tongue that extends past the lower lip is a normal finding in newborns, as babies are still developing their oral reflexes and muscle tone. This is not a cause for concern, and no follow-up is required unless other feeding issues arise. It's important to differentiate between normal tongue movements and more serious concerns like tongue-tie (ankyloglossia), but this is not indicative of a problem by itself.

E) Diminished breath sounds on one side:
Diminished breath sounds on one side of the chest can indicate a serious issue, such as a pneumothorax, diaphragmatic hernia, or other respiratory concerns. This finding warrants immediate follow-up, as the newborn could be experiencing a respiratory distress condition that needs urgent intervention and management. This is a significant finding requiring immediate evaluation.

Correct Answer is ["2"]

Explanation

Given:

Desired dose: Ampicillin 0.5 g PO

Available concentration: Ampicillin capsules 250 mg each

To find:

Number of capsules to administer for a single dose

Step 1: Convert desired dose to milligrams

We know that 1 gram (g) is equal to 1000 milligrams (mg). Therefore, to convert the desired dose from grams to milligrams, we multiply by 1000:

Desired dose (mg) = Desired dose (g) x 1000

Desired dose (mg) = 0.5 g x 1000 = 500 mg

Step 2: Calculate the number of capsules

To find the number of capsules, we divide the desired dose by the strength of each capsule:

Number of capsules = Desired dose / Capsule strength

Number of capsules = 500 mg / 250 mg/capsule = 2 capsules

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