Simple calculations in clinical anesthesia | review

Recently, many colleagues in the background asked about the calculation of drugs in anesthesia work, so I simply edited and republished the articles about calculations that I published in the past two years.
Please refer to each other.

The above is the most commonly used method for pumping vasoactive drugs.
According to the potency of the drugs and the commonly recommended doses, the key is to configure the amount of vasoactive drugs (solutes) in 50ml.
The above methods are generally called "standard formulations".
The logic is shown in the figure below.

The pump injection method of dextromethorphan is more complicated.
According to foreign guidelines, the total load is generally recommended to be 1ug/kg.
For example, the dextromethorphan load of a 60kg patient is 60ug, that is, the standard method of walking speed is 1.
5×60=90ml/h, and the time is 10min; However, the domestic guidelines recommend a smaller dose, the total amount is 0.
8ug/kg or 0.
67ug/kg, the corresponding pump speed at this time is 0.
8×(1.
5×kg)=1.
2×kg(ml/h), 0.
67×( 1.
5×kg)=1.
0×kg (ml/h), but it must be noted that this speed can only be pumped for 10 minutes.

The key to understanding the alkali supplement formula is that blood gas analysis reflects the pH of the extracellular fluid.
The supplemented alkali fluid needs to correct the entire extracellular fluid.
It is very simple to understand this point and then calculate the formula.

Recommendation: Excuse me: Can I not catheterize after spinal anesthesia?