My senior doctor told to keep IVF at 75ml/hr who should I keep that exact rate
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IV fluid rate 75 ml/hr indication maintenance nursing
Here is a clear answer to your question:
Keep 75 ml/hr for the Patient Your Doctor Ordered It For
The answer is simple: keep that exact rate (75 ml/hr) for the specific patient your senior doctor prescribed it for. You do not change it or apply it to other patients unless ordered.
Why 75 ml/hr Is a Common Maintenance Rate
75 ml/hr is a standard maintenance IV fluid rate for adults. According to Nurse Key's IV calculations guide:
"The average-sized adult patient who is NPO for a short period of time but is otherwise well hydrated, with good heart, lung, and renal function, may have a maintenance isotonic continuous IV solution ordered at about 75-125 mL per hr."
This works out to roughly 1.8 L over 24 hours, which falls within the typical adult maintenance requirement of 25-30 ml/kg/day (per NICE guidelines).
Typical Patients Who May Receive 75 ml/hr
| Patient Type | Rationale |
|---|---|
| NPO (nil per oral) patients awaiting surgery | Replacing normal oral fluid intake |
| Post-operative patients (mild to moderate) | Maintenance after procedure |
| Patients with mild dehydration | Slow, controlled rehydration |
| Patients with restricted fluid intake | Deliberate sub-maintenance rate |
| Patients with mild cardiac/renal concerns | Lower rate to avoid fluid overload |
Key Nursing Points
- Follow the order exactly - 75 ml/hr means 75 ml/hr, not 70 or 80.
- Do not apply this rate to any other patient without a separate order for them.
- Monitor hourly - check the drip rate and infusion pump regularly.
- Reassess - if the patient develops signs of fluid overload (breathlessness, swelling, raised JVP) or dehydration, inform your senior immediately rather than adjusting the rate yourself.
- Document the rate, fluid type, and time started in nursing notes.
If your senior said "keep IVF at 75 ml/hr," that is the prescription for that patient - your job is to maintain that exact rate, monitor the patient's response, and escalate if anything changes.
Formula included in it Flow rate
The flow rate formula for IV fluids is a core nursing calculation. Let me give you this directly.
IV Flow Rate Formulas
Formula 1 — Flow Rate in ml/hr (for infusion pumps)
$$\text{Flow Rate (ml/hr)} = \frac{\text{Volume to be infused (ml)}}{\text{Time (hours)}}$$
Formula 2 — Drop Rate in drops/min (for manual drip sets)
$$\text{Drop Rate (drops/min)} = \frac{\text{Volume (ml) × Drop factor (drops/ml)}}{\text{Time (minutes)}}$$
Common drop factors:
| Drip Set Type | Drop Factor |
|---|---|
| Macro drip (standard adult) | 20 drops/ml |
| Macro drip (alternate) | 15 drops/ml |
| Micro drip (pediatric) | 60 drops/ml |
Applying It to Your Case: 75 ml/hr
On an Infusion Pump
The pump is already set in ml/hr, so simply set it to 75 ml/hr directly. No calculation needed.
Calculating Drops/min for a Manual Drip Set
Given: 75 ml/hr, using a 20 drops/ml macro set
Step 1 - Convert hours to minutes:
75 ml/hr = 75 ml over 60 minutes
Step 2 - Apply formula:
$$\text{Drops/min} = \frac{75 \times 20}{60} = \frac{1500}{60} = \textbf{25 drops/min}$$
Quick Reference Table for 75 ml/hr
| Drop Set | Drops/min |
|---|---|
| 20 drops/ml (macro) | 25 drops/min |
| 15 drops/ml (macro) | 18.75 ≈ 19 drops/min |
| 60 drops/ml (micro) | 75 drops/min |
Easy Shortcut to Remember
For a 20 drops/ml set: Drops/min = ml/hr ÷ 3 → 75 ÷ 3 = 25 drops/min ✓
For a 60 drops/ml set: Drops/min = ml/hr (they are equal) → 75 ml/hr = 75 drops/min ✓
So for your senior's order of 75 ml/hr using a standard macro drip set, count 25 drops every minute at the drip chamber.
What drop factor does your IV set have?
I'm an AI, so I don't have a physical IV set! 😊
You need to check your IV set packaging - the drop factor is always printed on the wrapper of the IV giving set.
How to Find It
Look at the label on your IV set packet. It will say something like:
| What you see on packet | Drop Factor |
|---|---|
| "20 drops/ml" | 20 gtt/ml (standard adult macro drip) |
| "15 drops/ml" | 15 gtt/ml (macro drip - some brands) |
| "60 drops/ml" | 60 gtt/ml (micro drip / pediatric set) |
Most Common in Clinical Settings
- Adult wards → usually 20 drops/ml macro drip set
- Pediatric wards → usually 60 drops/ml micro drip set
- ICU/pumps → infusion pump (no drop calculation needed - just set ml/hr directly)
Once You Know Your Drop Factor
Use the formula:
$$\text{Drops/min} = \frac{75 \times \text{Drop Factor}}{60}$$
| If your set is... | Calculation | Answer |
|---|---|---|
| 20 drops/ml | 75 × 20 ÷ 60 | 25 drops/min |
| 15 drops/ml | 75 × 15 ÷ 60 | ≈ 19 drops/min |
| 60 drops/ml | 75 × 60 ÷ 60 | 75 drops/min |
Check the packet, identify your drop factor, then apply the formula above to get your exact drip rate!
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