Blood/gas distribution coefficient (λ blood/gas)

Oil/gas partition coefficient (fat solubility)

Minimum alveolar effective concentration (MAC)

N2O: The inspired oxygen concentration must be maintained above 0.3 to avoid hypoxemia.

Enflurane: Elevated inhaled concentrations may cause epileptiform spikes and burst suppression

Isoflurane: has no significant effect on liver and kidney function

Sevoflurane: can be used for induction and maintenance of anesthesia

Desflurane: "Quick to sleep, quick to wake up", requires special vaporizer

Can increase cerebral blood flow, intracranial pressure and cerebral metabolic rate

Sympathetic nerve stimulating effect

Mild impact on breathing

Can increase saliva and respiratory secretions

Can cause transient respiratory depression; hallucinations, psychiatric symptoms; increased intraocular pressure and intracranial pressure

1. An artificial airway should be established and assisted or controlled breathing should be performed

2. Muscle relaxants have no sedative or analgesic effects and cannot be used alone. They should be used under the action of general anesthesia.

3. The application of succinylcholine can cause a temporary increase in serum potassium; therefore, it is contraindicated in patients with severe trauma, burns, paraplegia, glaucoma, and elevated intracranial pressure.

4. Hypothermia can prolong the action time of muscle relaxants

5. Patients with neuromuscular junction diseases are contraindicated in using non-depolarizing muscle relaxants.

6. Some muscle relaxants have the effect of releasing histamine, so those with asthma and allergies should use with caution.

Open drip method (basically abandoned)

Mask inhalation induction