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Dopamine: |
Sympathomimetic Chatecholamine |
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DA1 > DA2 > b; dose = a > b > DA |
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INFUSION DOSING |
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This is the starting dose. Also known by rebelious types and more "experienced" doctors as "Renal dose Dopa" which may be ordered to increase renal perfusion. |
2-5 mcg/kg/min |
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This dose is higher than the previous dose (duh). You get more cardiac contractility in this dosage range. |
5-10 mcg/kg/min |
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Now this is the relief you've been waiting for! Vasoconstriction! Now you can go pee... |
10-20 mcg/kg/min |
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What, you mean the Vasopressin, Levophed, and the upside down cardiac chair position still isn't enough? Time to change code status... |
20-30 mcg/kg/min |
Used
for severe heart failure, cardiogenic shock, and hypotension to improve CO.
It is the precursor of norepinephrine and epinephrine, and directly
releases norepinephrine from stores within the heart.
Half life: very short, effects end only 5-10 minutes after IV infusion is stopped.
Side Effects: AMI, arrhythmias, HTN, N/V, HA. Extravasation causes tissue necrosis.
Contraindicated:
Tachydysrhythmias and HTN.
*If
pt. is on MAO inhibitors, you must cut the dose by 1/10th!!!
Dopamine
is preferred when there is impaired renal blood flow, such as severe CHF.
Dobutamine
is preferred if a pt. is tachycardic, or has ventricular arrhythmias (or risk).
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