## Answers

**ANSWER.**

**23) Calculation of gtt/min.**

**Formula**

** ** **gtt/min = Volume(ml) / Time(min) * Drop factor (gtt/ml).**

Here

Volume(ml) = 500 ml

Time (min) = 600 min (10hr).

Drop factor = 60 gtt/ml (microdrip drop factor).

As per above formula

** gtt/min** = 500/600 * 60

= 0.83 * 60

= 49.8

= **50 gtt/min.**

**24) Calculation gtt/min.**

** ** **gtt/min = Volume(ml) / Time(min) * Drop factor(gtt/ml).**

Here

Volume(ml) = 250 ml

Time(min) = 120 min (2hr).

Drop factor = 10 gtt/ml.

As per above formula

**gtt/min =** 250/120 * 10

= 2.08 * 10

= 20.8

= **21 gtt/min.**

**25) Calculation of ml/hr.**

** ** **ml/hr = Volume(ml) / Time(hr).**

**Calculation of volume.**

** Volume(ml) =** **Desired dose/Dose in hand * Quantity.**

** Here**

Desired dose(D) = 1 g.

Dose in hand (H) = 1 g.

Quantity (Q) = 200 ml.

As per above formula

Volume(ml) of drug required = **D/H * Q**

= 1/1 * 200

= 200 ml.

**TIme (hr) =** 1.5 hr (90 min).

So

**ml/hr** = 200 / 1.5

= **133.3 ml/hr.**

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