Question

The physician ordered for 1 gram of Vancomycin to infuse over 90 minutes. Vancomycin is available as 1 gram per 250ml of 5% Dextrose. Calculate the pump flow rate in ml/hr.

The Pediatrician has ordered IM Penicillin G 10000 units per kg. The patient weight is 150 lbs. How many mg is the ordering dose? Round to nearest thousand place.

A patient is to receive 8.75 mg of codeine. Available to you is 2.5mg per 1 ml. How many ml will the patient be given to receive the proper dose? Do not round.

Answer 1

ANS :

1. We having following values -

* Dose ordered - 1 gm of Inj . Vancomycin.  

* Time - 90 minutes.

* Dose available - inj . Vancomycin 1gm / 250 ml of Dextrose 5%

* Pump flow rate ( ml/ hr ) = ?

Formula :

Rate ( ml/ min) = Dose available( ml)/Time ( min)

= 250 / 90

= 2.77 ml / min

We want to find flow rate per hour.

Rate ( ml / hr ) = 2.77 × 60 ( 1 hr = 60 min )

= 166.2 ml/ hr

So, Nurse should set pump flow rate on 166.2 ml / hr for giving 1 gm vancomycin diluted in 250 ml dextrose in 90 min.

2. We having value of following :

* Dose ordered - Inj. Penicillin G 10,000units / kg

* Pt weight - 150 lbs

* Dose for baby - ?

For calculating dose for baby we should convert weight of baby in kg from lbs.

150 lbs = 68.04 ( 1 kg = 2.20 lbs )

Ordering dose = weight in kg × 10,000

= 68.04 × 10000

= 680,400 Units .

Inj. Penicillin G contains 1000 units = 1 mg approximately

Dose order in mg = 680400 ÷ 1000

= 680.4 mg

= 680 mg ( > 0.5 )

So , nurse should give 680 mg inj . Penicillin G IM to patient.

3. We having following values :

* Dose ordered - 8.75 mg of codein

* Available Dose - 2.5 mg / ml

* Patient receive how many ml ?

Formula -

Administration of dose in ml = Dose order (mg )/

Available dose(mg)

= 8.75 / 2.5

= 3.5 ml

So, nurse should administer 3.5 ml of Inj. Codein to giving 8.75 mg dose.