§ 18
How much medicine should go in the water?
Answer: Experimental animals poultry and groups of animals are often medicated through drinking water. The vet prescribes a dose in mg per kg per day and you must convert it to a concentration in the water. It requires that you know the animals' weight and how much they actually drink. Measure intake in 2-3 days before starting because animals drink differently depending on species age temperature and feed. The calculator also works out how much preparation should go in the bottle or tank and how long it lasts.
Dosis pr. dyr pr. døgn (mg) = dosis (mg/kg/døgn) × vægt pr. dyr (kg)
Koncentration (mg/l) = dosis pr. dyr pr. døgn ÷ vandindtag pr. dyr (l/døgn)
Præparat til flasken (mg) = koncentration × flaskens liter
Flasken rækker (døgn) = flaskens ml ÷ (vandindtag pr. dyr × antal dyr)
| Symbol | Meaning | Unit |
|---|---|---|
| dosis_mg_kg_doegn | Ordered dose (from the vet) | mg/kg/døgn |
| vaegt_kg | Weight per animal | kg |
| vand_ml_doegn | Measured water intake per animal | ml/døgn |
| antal_dyr | Number of animals drinking from the bottle/tank | stk |
| flaske_ml | Bottle or tank volume | ml |
| = | Concentration in drinking water | mg/l |
| = | Medication for whole bottle/tank | mg |
| = | Dose per animal per 24-hour period | mg |
| = | The bottle/tank lasts | døgn |
Does not apply when
The calculator's own default values inserted. The figures are calculated with exactly the formula the tool uses.
Substituted
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Du bruger den, når en gruppe dyr skal medicineres gennem drikkevandet, fx mus og rotter i et forsøgsdyranlæg eller fjerkræ. Dosis er dyrlægens. Du regner koncentrationen og mængden til flasken eller tanken.
Fem mus på 30 g drikker hver ca. 5 ml om dagen. Dyrlægen har ordineret 10 mg/kg/døgn, og vandflasken rummer 250 ml.
It means: Vandet skal indeholde 60 mg/l, så der skal 15 mg præparat i flasken. Den rækker i 10 24 hours, men skift den, så ofte præparatets holdbarhed i vand siger.
Fire rotter på 350 g drikker hver ca. 35 ml om dagen. Dyrlægen har ordineret 5 mg/kg/døgn, og flasken rummer 500 ml.
It means: Koncentrationen skal være 50 mg/l, så du skal bruge 25 mg til flasken. Hver rotte får 1.75 mg i døgnet, og flasken rækker i 3.6 24 hours.
Mus drikker ca. 15 ml pr. 100 g kropsvægt om dagen og rotter ca. 10 ml pr. 100 g.
Vej flasken hver dag. Falder indtaget, får dyrene for lidt medicin, og dyrlægen skal vide det.