CRI Calculators


Select Species and Sex
lbs
kgs

Fluid Rate-ml/hr


*Cats should be limited to a maximum dose rate of 1.5 mg/kg/hr (25 mcg/kg/min)
Drug Dose Range Drug Dose (mg/ml) Volume
Morphine 15mg/ml 0.12 to 0.36 mg/kg/hr
(2 to 6 ug/kg/min)
Lidocaine 20mg/ml 0.6 to 3.0 mg/kg/hr
(10 to 50 ug/kg/minute)*
Ketamine 100mg/ml 0.12 to 1.2 mg/kg/hr
(2 to 20 ug/kg/minute)
Volume of fluid to remove

Drug Dose Range Drug Dose (mg/ml) Volume (ml)
Methadone 10mg/ml 0.083 to 0.166 mg/kg/hr
(1.4 to 2.8 ug/kg/min)
Lidocaine 20mg/ml 0.6 to 3.0 mg/kg/hr
(10 to 50 ug/kg/minute)*
Ketamine 100mg/ml 0.12 to 1.2 mg/kg/hr
(2 to 20 ug/kg/minute)
Volume to remove
Drug Dose Range Drug Dose (mg/ml) Volume
Hydromorphone 2mg/ml 0.024 to 0.072 mg/kg/hr
(0.4 to 1.2 ug/kg/min)
Lidocaine 20mg/ml 0.6 to 3.0 mg/kg/hr
(10 to 50 ug/kg/minute)*
Ketamine 100mg/ml 0.12 to 1.2 mg/kg/hr
(2 to 20 ug/kg/minute)
Volume of fluid to remove
Drug Dose Range Drug Dose (mg/ml) Volume
Buprenorphine 0.00245 to 0.0075 mg/kg/hr
(0.042 to 0.125 ug/kg/min)
Lidocaine 20mg/ml 0.6 to 3.0 mg/kg/hr
(10 to 50 ug/kg/minute)*
Ketamine 100mg/ml 0.12 to 1.2 mg/kg/hr
(2 to 20 ug/kg/minute)
Volume of fluid to remove
Drug Dose Range Drug Dose (mg/ml) Volume
Butorphanol 10 mg/ml 0.012 to 0.072 mg/kg/hr
(0.2 to 1.20 ug/kg/min)
Lidocaine 20mg/ml 0.6 to 3.0 mg/kg/hr
(10 to 50 ug/kg/minute)*
Ketamine 100mg/ml 0.12 to 1.2 mg/kg/hr
(2 to 20 ug/kg/minute)
Volume of fluid to remove
Drug Dose Range Drug Dose (mg/ml) Volume
Fentanyl 0.05 mg/ml 0.012 to 0.072 mg/kg/hr
(0.2 to 1.20 ug/kg/min)
Lidocaine 20mg/ml 0.6 to 3.0 mg/kg/hr
(10 to 50 ug/kg/minute)*
Ketamine 100mg/ml 0.12 to 1.2 mg/kg/hr
(2 to 20 ug/kg/minute)
Volume of fluid to remove
Drug Dose Range Drug Dose (mg/ml) Volume (ml)
Dexmedetomidine 0.5 mg/ml 0.0005– 0.002 mg/kg/hr
Lidocaine 20mg/ml 0.6 to 3.0 mg/kg/hr
(10 to 50 ug/kg/minute)*
Ketamine 100mg/ml 0.12 to 1.2 mg/kg/hr
(2 to 20 ug/kg/minute)
Volume to remove
Drug Dose Range Drug Dose (mg/ml) Volume (ml)
Morphine 15mg/ml 0.12 to 0.36 mg/kg/hr
(2 to 6 ug/kg/min)
Fentanyl 0.05 mg/ml 0.012 to 0.072 mg/kg/hr
(0.2 to 1.20 ug/kg/min)
Butorphanol 10 mg/ml 0.012 to 0.072 mg/kg/hr
(0.2 to 1.20 ug/kg/min)
Hydromorphone 2mg/ml 0.024 to 0.072 mg/kg/hr
(0.4 to 1.2 ug/kg/min)
Methadone 10mg/ml 0.083 to 0.166 mg/kg/hr
(1.4 to 2.8 ug/kg/min)
Buprenorphine 0.00245 to 0.0075 mg/kg/hr
(0.042 to 0.125 ug/kg/min)
Dexmedetomidine 0.5 mg/ml 0.0005– 0.002 mg/kg/hr
Lidocaine 20mg/ml 0.6 to 3.0 mg/kg/hr
(10 to 50 ug/kg/minute)*
Ketamine 100mg/ml 0.12 to 1.2 mg/kg/hr
(2 to 20 ug/kg/minute)
Drug Dosage Range Set Dose Volume
Morphine
15 mg/ml
0.1 - 0.5 mg/kg IV IM
Fentanyl
0.05 mg/ml
0.002 - 0.003 mg/kg IV IM
Hydromorphone
2 mg/ml
0.05 - 0.1 mg/kg IV IM
Methadone
10 mg/ml
0.5 mg/kg IV IM
Buprenorphine 0.01 - 0.02 mg/kg IV IM SQ
Butorphanol
10 mg/ml
0.1 - 0.5 mg/kg IV IM
Dexmedetomidine 1–4 mcg/kg IV IM
Lidocaine
20mg/ml
0.25-1.0mg/kg IV
Ketamine
100 mg/ml
0.25 - 0.5 mg/kg IV