Tuesday 6 August 2013

iv hydralazine

Iv hydralazine

Indication:
1.       When bp > 160/110 mmhg or
2.       Mean arterial pressure > 125 mmhg

For rapid control
1.       Iv hydralazine 5mg bolus over 15-20 mins and repeat every 15-20 mins to a maximum cumulative dosage of 20mg.


Maintenance dose using infusion pump
1.       Dilute 50 mg hydralazine in 50cc normal saline <1ml/ml>
2.       Start at 5ml/h infusion of hydralazine
3.       Increase every 15-20 mins by 1ml/h until maximum dose od 10ml/h
4.       Aim to reduce dbp to 90-100

Maintenance dose using infusion drip set
1.       Dilute 50mg hydralazine in 500cc normal saline <0.1mg/ml>
2.       Start at 5dpm of hydralazine <0.025mg/ml>
3.       Increase every 15-20 mins by 5dpm until max dose of 30dpm
4.       Aim to reduce dbp to 90-100 mmhg
5.       Stop infusion if dbp <80mmhg.


Contraindications
1.       Severe tachycardia
2.       Dissecting aortic aneurysm
3.       Heart failure with high cardiac output.
4.       Cor pulmonale
5.       Myocardial insufficiency due to mechanical obstruction
6.       Coronary artery disease
7.       Idiopathic SLE
8.       Patient with recent MI


1 comment:

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