Total intravenous anaesthesia

Anesthesia technique using intravenous drugs

Total intravenous anaesthesia (TIVA) is a method of inducing and maintaining general anesthesia exclusively through the administration of intravenous drugs, without the use of inhalation agents. This technique is often employed in various surgical procedures and is known for its ability to provide a stable and controlled anesthetic state.

Technique

TIVA involves the continuous infusion of anesthetic drugs through an infusion pump. The most commonly used drugs in TIVA include propofol, remifentanil, and other opioids. These drugs are administered in a carefully controlled manner to maintain the desired depth of anesthesia.

An infusion pump used for administering intravenous drugs.

The administration of TIVA requires precise monitoring of the patient's physiological parameters, including heart rate, blood pressure, and oxygen saturation. An important aspect of TIVA is the use of bispectral index (BIS) monitoring or other forms of electroencephalography (EEG) to assess the depth of anesthesia.

An EEG recording cap used for monitoring brain activity during anesthesia.

Advantages

TIVA offers several advantages over traditional inhalation anesthesia. It provides a more predictable and rapid recovery, as the drugs used have a short half-life and are quickly metabolized. This can lead to reduced postoperative nausea and vomiting, which is a common side effect of inhalation agents.

Additionally, TIVA is beneficial in patients with a history of malignant hyperthermia, a rare but serious reaction to certain anesthetic gases. Since TIVA does not use inhalation agents, it eliminates the risk of triggering this condition.

Disadvantages

Despite its benefits, TIVA also has some disadvantages. The technique requires sophisticated equipment and careful monitoring, which can increase the complexity and cost of anesthesia management. Furthermore, the lack of inhalation agents means that there is no direct measurement of anesthetic concentration, making it crucial to rely on indirect measures such as BIS monitoring.

Applications

TIVA is widely used in various surgical settings, including day surgery, neurosurgery, and cardiac surgery. It is particularly useful in procedures where rapid recovery and minimal postoperative side effects are desired.

Related pages

• Anesthesia
• Propofol
• Remifentanil
• Malignant hyperthermia

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  Infusion pump used in total intravenous anaesthesia
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  EEG recording cap used in total intravenous anaesthesia