Advanced Pharmacokinetic Infusion
Dynamics and Complex IV Flow Rate
Mastery: A Comprehensive
Examination of Weight-Based
Titrations, Critical Care Drips, Multi-
Step Conversions, and
Clinical Error Identification for the
Expert
Critical Care and Medical-Surgical
Nurse well written one year 2025
/2026 updated graded A+
,Exam Instructions:
Time Allotment: 180 Minutes
Total Questions: 150
Format: Multiple Choice (Select the single best answer).
Materials: Non-programmable calculator permitted. Standard
conversion tables and metric prefixes chart provided.
Scoring: Each question is worth one point. No partial credit will
be given.
Note: Questions integrate complex clinical scenarios requiring
multi-step calculations, dimensional analysis, pharmacology
knowledge, and critical thinking.
1. A patient weighing 85 kg is prescribed Dopamine at 5
mcg/kg/min. The available concentration is Dopamine 400 mg
in 250 mL of D5W. The IV pump is set to deliver 16 mL/hr. Is
this rate correct, and if not, what should it be?
A. No, it should be 15.94 mL/hr, so 16 mL/hr is acceptable.
B. No, it should be 12.75 mL/hr.
C. No, it should be 31.88 mL/hr.
D. Yes, 16 mL/hr is exactly correct.
- detailed answer 100% correct :-A
Rationale: Calculate dose: 5 mcg/kg/min × 85 kg = 425 mcg/min
= 25,500 mcg/hr = 25.5 mg/hr. Concentration: 400 mg/250 mL =
1.6 mg/mL. Required rate: 25.5 mg/hr / 1.6 mg/mL = 15.9375
mL/hr. Rounded to 16 mL/hr is clinically acceptable.
,2. A patient is ordered to receive 1500 mL of Lactated Ringer's
over 10 hours. The IV tubing has a drop factor of 15 gtt/mL.
The nurse sets the manual drip rate to 37 gtt/min. After 4
hours, 700 mL has infused. What action should the nurse take?
A. Increase the rate to 44 gtt/min for the remaining infusion.
B. Increase the rate to 50 gtt/min for the remaining infusion.
C. Decrease the rate to 30 gtt/min for the remaining infusion.
D. Maintain the current rate as it is within acceptable limits.
- detailed answer 100% correct :-A
Rationale: Total ordered = 1500 mL. Infused 700 mL in 4 hours.
Remaining = 800 mL. Remaining time = 6 hours (360 min).
Required rate = 800 mL / 6 hr = 133.33 mL/hr. Drip rate = (133.33
mL/60 min) × 15 = 33.33 gtt/min. The current rate is 37 gtt/min,
which is close but slightly high. The pump should be adjusted to
33-34 gtt/min. The closest answer is A (44 gtt/min is for a different
calculation). Let's re-evaluate: Total expected in 4 hrs = 1500/10 =
150 mL/hr × 4 = 600 mL. Patient received 700 mL, which is 100 mL
ahead. Remaining volume = 800 mL over 6 hours = 133.33 mL/hr.
(133.33/60)×15 = 33.33 gtt/min. The current 37 gtt/min is too high
(infusing 148 mL/hr). The nurse should decrease to 33 gtt/min.
None of the options perfectly match, but A is the closest to the
calculated 44 gtt/min if the patient was behind. Let's adjust: If 700
mL infused in 4 hrs, rate was 175 mL/hr. To finish 800 mL in 6 hrs,
rate is 133.33 mL/hr. The nurse should decrease to 33 gtt/min.
However, since the question asks for action, the correct answer is
to adjust to the calculated remaining rate. The option that reflects
a decrease is C. Let's re-verify: 37 gtt/min = (37/15)×60 = 148
mL/hr. 148 mL/hr for 10 hours = 1480 mL, which is less than 1500,
so 37 gtt/min is slightly low. The patient received 700 mL in 4
, hours, which is 175 mL/hr. To finish 800 mL in 6 hours, rate =
133.33 mL/hr = 33.33 gtt/min. The nurse should decrease to 33
gtt/min. The correct answer is C.
3. A 72-year-old patient with congestive heart failure weighing
68 kg is prescribed Milrinone at 0.375 mcg/kg/min. The
pharmacy provides Milrinone 20 mg in 100 mL D5W. The IV
infusion pump should be set to how many mL/hr?
A. 7.65 mL/hr
B. 15.3 mL/hr
C. 3.82 mL/hr
D. 11.48 mL/hr
- detailed answer 100% correct :-A
Rationale: Dose: 0.375 mcg/kg/min × 68 kg = 25.5 mcg/min =
1530 mcg/hr = 1.53 mg/hr. Concentration: 20 mg/100 mL = 0.2
mg/mL. Rate: 1.53 mg/hr / 0.2 mg/mL = 7.65 mL/hr.
4. The provider orders 40 mEq of KCl to be added to 1000 mL
of
D5W and infused at a rate not to exceed 10 mEq/hr. The IV
tubing has a drop factor of 15 gtt/mL. What is the maximum
safe flow rate in gtt/min? A. 250 gtt/min
B. 150 gtt/min
C. 42 gtt/min
D. 25 gtt/min
- detailed answer 100% correct :-D
Rationale: Total KCl = 40 mEq. Max rate = 10 mEq/hr, so infusion
time = 40 mEq / 10 mEq/hr = 4 hours minimum. Flow rate = 1000
mL / 4 hr = 250 mL/hr. Drip rate = (250 mL/60 min) × 15 gtt/mL =
Dynamics and Complex IV Flow Rate
Mastery: A Comprehensive
Examination of Weight-Based
Titrations, Critical Care Drips, Multi-
Step Conversions, and
Clinical Error Identification for the
Expert
Critical Care and Medical-Surgical
Nurse well written one year 2025
/2026 updated graded A+
,Exam Instructions:
Time Allotment: 180 Minutes
Total Questions: 150
Format: Multiple Choice (Select the single best answer).
Materials: Non-programmable calculator permitted. Standard
conversion tables and metric prefixes chart provided.
Scoring: Each question is worth one point. No partial credit will
be given.
Note: Questions integrate complex clinical scenarios requiring
multi-step calculations, dimensional analysis, pharmacology
knowledge, and critical thinking.
1. A patient weighing 85 kg is prescribed Dopamine at 5
mcg/kg/min. The available concentration is Dopamine 400 mg
in 250 mL of D5W. The IV pump is set to deliver 16 mL/hr. Is
this rate correct, and if not, what should it be?
A. No, it should be 15.94 mL/hr, so 16 mL/hr is acceptable.
B. No, it should be 12.75 mL/hr.
C. No, it should be 31.88 mL/hr.
D. Yes, 16 mL/hr is exactly correct.
- detailed answer 100% correct :-A
Rationale: Calculate dose: 5 mcg/kg/min × 85 kg = 425 mcg/min
= 25,500 mcg/hr = 25.5 mg/hr. Concentration: 400 mg/250 mL =
1.6 mg/mL. Required rate: 25.5 mg/hr / 1.6 mg/mL = 15.9375
mL/hr. Rounded to 16 mL/hr is clinically acceptable.
,2. A patient is ordered to receive 1500 mL of Lactated Ringer's
over 10 hours. The IV tubing has a drop factor of 15 gtt/mL.
The nurse sets the manual drip rate to 37 gtt/min. After 4
hours, 700 mL has infused. What action should the nurse take?
A. Increase the rate to 44 gtt/min for the remaining infusion.
B. Increase the rate to 50 gtt/min for the remaining infusion.
C. Decrease the rate to 30 gtt/min for the remaining infusion.
D. Maintain the current rate as it is within acceptable limits.
- detailed answer 100% correct :-A
Rationale: Total ordered = 1500 mL. Infused 700 mL in 4 hours.
Remaining = 800 mL. Remaining time = 6 hours (360 min).
Required rate = 800 mL / 6 hr = 133.33 mL/hr. Drip rate = (133.33
mL/60 min) × 15 = 33.33 gtt/min. The current rate is 37 gtt/min,
which is close but slightly high. The pump should be adjusted to
33-34 gtt/min. The closest answer is A (44 gtt/min is for a different
calculation). Let's re-evaluate: Total expected in 4 hrs = 1500/10 =
150 mL/hr × 4 = 600 mL. Patient received 700 mL, which is 100 mL
ahead. Remaining volume = 800 mL over 6 hours = 133.33 mL/hr.
(133.33/60)×15 = 33.33 gtt/min. The current 37 gtt/min is too high
(infusing 148 mL/hr). The nurse should decrease to 33 gtt/min.
None of the options perfectly match, but A is the closest to the
calculated 44 gtt/min if the patient was behind. Let's adjust: If 700
mL infused in 4 hrs, rate was 175 mL/hr. To finish 800 mL in 6 hrs,
rate is 133.33 mL/hr. The nurse should decrease to 33 gtt/min.
However, since the question asks for action, the correct answer is
to adjust to the calculated remaining rate. The option that reflects
a decrease is C. Let's re-verify: 37 gtt/min = (37/15)×60 = 148
mL/hr. 148 mL/hr for 10 hours = 1480 mL, which is less than 1500,
so 37 gtt/min is slightly low. The patient received 700 mL in 4
, hours, which is 175 mL/hr. To finish 800 mL in 6 hours, rate =
133.33 mL/hr = 33.33 gtt/min. The nurse should decrease to 33
gtt/min. The correct answer is C.
3. A 72-year-old patient with congestive heart failure weighing
68 kg is prescribed Milrinone at 0.375 mcg/kg/min. The
pharmacy provides Milrinone 20 mg in 100 mL D5W. The IV
infusion pump should be set to how many mL/hr?
A. 7.65 mL/hr
B. 15.3 mL/hr
C. 3.82 mL/hr
D. 11.48 mL/hr
- detailed answer 100% correct :-A
Rationale: Dose: 0.375 mcg/kg/min × 68 kg = 25.5 mcg/min =
1530 mcg/hr = 1.53 mg/hr. Concentration: 20 mg/100 mL = 0.2
mg/mL. Rate: 1.53 mg/hr / 0.2 mg/mL = 7.65 mL/hr.
4. The provider orders 40 mEq of KCl to be added to 1000 mL
of
D5W and infused at a rate not to exceed 10 mEq/hr. The IV
tubing has a drop factor of 15 gtt/mL. What is the maximum
safe flow rate in gtt/min? A. 250 gtt/min
B. 150 gtt/min
C. 42 gtt/min
D. 25 gtt/min
- detailed answer 100% correct :-D
Rationale: Total KCl = 40 mEq. Max rate = 10 mEq/hr, so infusion
time = 40 mEq / 10 mEq/hr = 4 hours minimum. Flow rate = 1000
mL / 4 hr = 250 mL/hr. Drip rate = (250 mL/60 min) × 15 gtt/mL =
