Profofol dosage in dogs and give also mainataines dosage during surgery
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propofol induction maintenance dose dogs veterinary anesthesia mg/kg CRI
Here is a complete, evidence-based reference for propofol use in dogs:
Propofol in Dogs - Dosing Guide
Induction Dose
| Patient Status | Dose | Administration |
|---|---|---|
| Unpremedicated | 4-6 mg/kg IV (up to 6.5 mg/kg) | Titrate slowly over 10-40 seconds to effect |
| Premedicated (opioid, acepromazine, alpha-2) | 1-4 mg/kg IV | Titrated to effect; lower doses due to sedation |
| Optimal infusion rate for induction | 1 mg/kg/min IV via syringe pump | Reduces apnea and hypotension compared to rapid bolus |
Key point: Always titrate to effect - give slowly and stop once the dog is ready for intubation. Rapid bolus administration significantly increases the risk of apnea and hypotension.
Maintenance Dose (CRI - Constant Rate Infusion) During Surgery
| Technique | Rate | Notes |
|---|---|---|
| Propofol TIVA alone | 0.2-0.4 mg/kg/min | Start infusion ~60 seconds after induction |
| With medetomidine premedication | 0.15 mg/kg/min | Alpha-2 agonists significantly reduce propofol requirements |
| Propofol + low-dose ketamine | 0.35 mg/kg/min propofol + 0.025 mg/kg/min ketamine | Ketamine reduces propofol minimum infusion rate |
| Propofol + high-dose ketamine | 0.30 mg/kg/min propofol + 0.05 mg/kg/min ketamine | Further reduction in propofol needed |
CRI dose calculation:
Dose (mg/kg/min) x body weight (kg) = mg/min needed from your syringe/pump
Important Clinical Notes
- Apnea is the most common adverse effect, especially with rapid administration or high doses. Have intubation equipment ready at all times.
- Hypotension is dose-dependent - rates of 0.5 mg/kg/min and above have caused marked hypotension in some studies and should be avoided.
- Recovery is rapid due to redistribution and short elimination half-life - this is one of propofol's major advantages in dogs.
- Bacterial contamination risk: propofol contains no antimicrobial preservative. Use immediately after opening; do not store partially used vials.
- Premedication matters: adequate premedication (opioid + benzodiazepine or alpha-2 agonist) reduces induction and maintenance requirements substantially, improving safety.
- Propofol alone provides no analgesia - always combine with analgesics (opioids, NSAIDs, local blocks) for surgical procedures.
Summary Quick Reference
| Phase | Dose |
|---|---|
| Induction (unpremedicated) | 4-6 mg/kg IV slow |
| Induction (premedicated) | 1-4 mg/kg IV slow |
| Maintenance CRI | 0.2-0.4 mg/kg/min |
Give me dosage for dog weight of 31 kgs
Here are the calculated propofol doses for a 31 kg dog:
Propofol Doses for a 31 kg Dog
Induction Dose
| Patient Status | Dose Range | Volume (10 mg/mL = 1% propofol) |
|---|---|---|
| Unpremedicated | 124 - 186 mg (4-6 mg/kg) | 12.4 - 18.6 mL |
| Premedicated | 31 - 124 mg (1-4 mg/kg) | 3.1 - 12.4 mL |
Always give slowly to effect - you may not need the full calculated dose. Titrate in increments and stop once the dog is ready for intubation.
Maintenance CRI During Surgery
| Technique | Rate (mg/kg/min) | Rate for 31 kg (mg/min) | Volume/min (1% propofol) | Volume/hour |
|---|---|---|---|---|
| Propofol alone | 0.2 - 0.4 mg/kg/min | 6.2 - 12.4 mg/min | 0.62 - 1.24 mL/min | 37.2 - 74.4 mL/hr |
| With alpha-2 premed | 0.15 mg/kg/min | 4.65 mg/min | 0.47 mL/min | 27.9 mL/hr |
| With ketamine CRI | 0.3 - 0.35 mg/kg/min | 9.3 - 10.85 mg/min | 0.93 - 1.09 mL/min | 55.8 - 65.1 mL/hr |
Start the CRI approximately 60 seconds after the induction dose. Adjust rate up or down based on depth of anesthesia and response to surgical stimulation.
Practical Example (Premedicated Dog, Moderate Surgery)
A 31 kg dog premedicated with an opioid + acepromazine:
- Induction: Give propofol at ~1 mg/kg/min IV. Expect to use roughly 62-93 mg (6.2-9.3 mL of 1%) - stop when ready to intubate.
- Maintenance CRI: Start at 0.3 mg/kg/min = 9.3 mg/min = 0.93 mL/min = ~55.8 mL/hr.
- Titrate: Reduce if too deep (slow HR, low BP); increase if lightening (swallowing, movement).
Note: These calculations assume standard 1% propofol (10 mg/mL). If using a different concentration, adjust volumes accordingly. Always have oxygen, intubation equipment, and vasopressors available.
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