Problem 106 - Cliffs Test Prep NCLEX-RN

Question

The physician orders parenteral IV fluid for a patient to infuse at 100 milliliters per hour. Using a 10 drop per milliliter macrodrop parenteral fluid administration set, the nurse calculates the drop rate at: 1\. 16.6 drops per minute. 2\. 10 drops per minute. 3\. 17 drops per minute. 4\. 33.3 drops per minute

Step-by-Step Solution

Answer

The nurse should calculate the drop rate at 17 drops per minute (option 3).

Step 1: Understand the Information

The physician ordered an IV fluid to infuse at a rate of 100 milliliters per hour. The administration set delivers 10 drops per milliliter.

Step 2: Calculate Drops per Hour

Given that the administration set is 10 drops per milliliter, for 100 milliliters, the drop rate per hour will be \(100 \text{ mL/hour} \times 10 \text{ drops/mL} = 1000 \text{ drops/hour}\).

Step 3: Convert drops per hour to drops per minute

To find the drop rate per minute, divide the drops per hour by 60, since there are 60 minutes in an hour: \( \frac{1000 \text{ drops/hour}}{60 \text{ minutes/hour}} \approx 16.67 \text{ drops/minute}\).

Step 4: Round to the Nearest Whole Number

Since the options given are whole numbers, round 16.67 to the nearest whole number. It rounds to 17.

Step 5: Select the Closest Correct Option

Comparing the calculated value (17 drops per minute) against the multiple-choice options, the closest correct option is 3. 17 drops per minute.

Key Concepts

Parenteral Administration

Parenteral administration refers to delivering substances, such as fluids, medications, or nutrients, into the body through means other than the digestive tract. This type includes intravenous (IV), intramuscular (IM), subcutaneous (SC), and intradermal (ID) routes. For patients requiring immediate effects or when oral administration isn't feasible, parenteral methods are ideal. IV administration is particularly common in hospitals for its rapid onset and effectiveness.

In an IV setup, fluids or medications are delivered directly into a vein, allowing faster and controlled administration. This is especially crucial when immediate intervention is necessary, like in cases of dehydration or critical illnesses. The choice of IV fluid and rate is determined by patient needs, set prescriptions, and medical guidelines.

Understanding this delivery method is essential for ensuring patient safety and efficacy in treatment. It requires careful monitoring of the administration rate and patient response to the therapy.

Nursing Calculations

Nursing calculations play a pivotal role in patient care, especially when administering medications or IV fluids. Accurate calculations ensure the effectiveness and safety of treatments, preventing both underdosing and overdosing.

In the realm of IV fluid administration, nursing calculations determine how quickly fluid enters the patient's system. The calculation involves understanding the volume prescribed, the delivery set’s capability (e.g., 10 drops per mL), and converting these into a manageable flow rate.

The example exercise begins with determining how much fluid, in milliliters, is required per hour. Given the drop factor (drops per mL), the nurse must calculate how many drops are needed per hour, and subsequently per minute, to achieve the prescribed rate. Breaking this into step-by-step calculations allows for minimizing errors and ensuring the correct infusion rate.

• Start with understanding the prescribed rate (e.g., 100 mL/hour).
• Use the drop factor to calculate drops per hour.
• Divide by 60 to convert to drops per minute.
• Round to the nearest whole number to match practical application.

Simplicity in these calculations through structured steps aids nurses in efficiently performing their duties and ensures optimal patient outcomes.

Drop Rate Calculation

Drop rate calculation is a crucial aspect of IV fluid administration and requires precision. It's the computation that determines how fast or slow fluid from an IV bag should run into a patient’s bloodstream to achieve the desired rate prescribed by a physician.

To calculate the drop rate, the nurse should apply the formula: \[ ext{Drop rate per minute} = rac{ ext{(Volume in mL) × (Drop factor in drops/mL)}}{ ext{Time in minutes}} \]Using the provided exercise, where the volume is 100 mL/hour and the drop factor is 10 drops/mL, the formula would look like this:

• Drops per hour: \[ 100 ext{ mL/hour} imes 10 ext{ drops/mL} = 1000 ext{ drops/hour} \]
• Drops per minute: \[ rac{1000 ext{ drops/hour}}{60} ext{ minutes/hour} ightarrow 16.67 ext{ drops/minute} \]
• The nearest whole number of 16.67 is 17, hence, the target drop rate is 17 drops/minute.

This calculated rate ensures that the patient receives the correct amount of fluid as intended. Understanding and executing this calculation, incorporating correct rounding and unit conversions, is vital for nurses to maintain safe and effective patient care.