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To induce general anesthesia, propofol is the drug used almost exclusively, having largely replaced sodium thiopental. [13]It is often administered as part of an anesthesia maintenance technique called total intravenous anesthesia, using either manually programmed infusion pumps or computer-controlled infusion pumps in a process called target controlled infusion (TCI).
The drug interactions between sedative-hypnotic agents and adjuvant agents suggest that dosing regimens cannot be fixed. [19] Instead, dosing should be based on adjusted body weight or estimated lean body weight, especially for obese patients. It is recommended that drug doses be titrated in brief intervals (around 20 to 60 seconds). [22]
Propofol infusion syndrome (PRIS) is a rare syndrome which affects patients undergoing long-term treatment with high doses of the anaesthetic and sedative drug propofol. It can lead to cardiac failure , rhabdomyolysis , metabolic acidosis , and kidney failure , and is often fatal.
An example for a simple case (mono-compartmental) would be to administer D=8 mg/kg to a human. A human has a blood volume of around V b l o o d = {\displaystyle V_{blood}=} 0.08 L/kg . [ 7 ] This gives a C 0 = {\displaystyle C_{0}=} 100 μg/mL if the drug stays in the blood stream only, and thus its volume of distribution is the same as V b l o ...
Propofol [6] is a non-barbiturate derivative that is thought to act by stimulating inhibitory GABA receptors and blocking excitatory NMDA receptors. It takes 40 seconds for the effects of propofol to kick in, and effects last six minutes. [3] Propofol has both sedative and amnestic effects, but provides no analgesia.
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Ciprofol appears to have similar effects upon the respiratory and cardiovascular systems as those propofol. [4] At doses of 0.4 mg/kg to 0.5 mg/kg, ciprofol induces equivalent sedation/anesthesia and has an incidence of adverse events similar to that of propofol 2.0 mg/kg. [14] [15]
In toxicology, the median lethal dose, LD 50 (abbreviation for "lethal dose, 50%"), LC 50 (lethal concentration, 50%) or LCt 50 is a toxic unit that measures the lethal dose of a given substance. [1] The value of LD 50 for a substance is the dose required to kill half the members of a tested population after a specified test duration.