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Sodium thiopental is an ultra-short-acting barbiturate and has been used commonly in the induction phase of general anesthesia.Its use has been largely replaced with that of propofol, but may retain some popularity as an induction agent for rapid-sequence induction and intubation, such as in obstetrics. [12]
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).
Commonly used intravenous induction agents include propofol, sodium thiopental, etomidate, methohexital, and ketamine. Inhalational anaesthesia may be chosen when intravenous access is difficult to obtain (e.g., children), when difficulty maintaining the airway is anticipated, or when the patient prefers it.
General anesthetics that agonize them are typically used to induce a state of sedation and/or unconsciousness. Such drugs include propofol, etomidate, isoflurane, benzodiazepines (midazolam, lorazepam, diazepam), and barbiturates (sodium thiopental, methohexital). [2] [3] [4]
Sodium thiopental (US trade name: Sodium Pentothal) is an ultra-short acting barbiturate, often used for anesthesia induction and for medically induced coma. The typical anesthesia induction dose is 0.35 grams.
Propofol Among the barbiturates mentioned above, thiopental and methohexital are ultra-short-acting and are used to induce and maintain anesthesia. [ 11 ] However, though they produce unconsciousness, they provide no analgesia (pain relief) and must be used with other agents. [ 11 ]
From the perspective of the subject receiving a sedative, the effect is a feeling of general relaxation, amnesia (loss of memory) and time passing quickly. Many drugs can produce a sedative effect including benzodiazepines, propofol, thiopental, ketamine and inhaled general anesthetics.
Thiopental; Metaraminol or ephedrine, where hypotension may occur secondary to the sedating drugs. Phenylephrine – This drug is administered to those with hypotension post intubation as a result of lidocaine, midazolam, fentanyl, Propofol, and ketamine. The dosages range from 50 to 200 μg in adults.