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General Anesthesia: Overview

General Anesthesia: Overview

Anesthesia is a medical procedure that uses drugs for CNS suppression to enable painless surgeries and procedures. The selection of anesthetics is influenced by their pharmacokinetic properties, side effects, and patient characteristics. Various types of anesthesia include general, local, regional, spinal, and inhalational.
General anesthesia induces unconsciousness in the whole body, while the others target specific areas or sensations. It is administered to minimize adverse effects, maintain...

Parenteral Anesthetics: Overview

Parenteral Anesthetics: Overview

Intravenous anesthetics are drugs administered parenterally to induce anesthesia or sedation. Propofol is a widely used agent formulated as a 1% emulsion in soybean oil, glycerol, and egg phosphatide. It induces rapid anesthesia primarily due to its rapid distribution from the bloodstream to target tissues and is metabolized in the liver. However, it can cause significant pain on injection and hypertriglyceridemia. Fospropofol, a water-based prodrug of propofol, lacks these adverse effects.

Stages of General Anesthesia

Stages of General Anesthesia

Various sedation levels offer significant advantages in facilitating procedural interventions for patients undergoing medical or invasive surgical procedures. These levels span from anxiolysis to general anesthesia, providing a spectrum of sedative effects to cater to specific patient needs. Anxiolysis reduces anxiety and is achieved through minimal sedation, enabling patients to remain awake and responsive while feeling more at ease during the procedure. This level can benefit minor...

Local Anesthetics: Pharmacokinetics

Local Anesthetics: Pharmacokinetics

The potency and duration of action of local anesthetics (LAs) are determined by their pharmacokinetics. Pharmacokinetics describes how LAs are absorbed, distributed, metabolized, and eliminated from the body. When administered to the vascular tissues, LAs are quickly absorbed and enter the systemic circulation, reducing their localized effects. Adding vasoconstrictors such as epinephrine to LAs reduces their absorption into the systemic circulation, making them clinically effective. The...

Inhalational Anesthetics: Overview

Inhalational Anesthetics: Overview

Inhalation anesthetics are drugs that induce general anesthesia upon inhalation. They work by increasing the sensitivity of GABAA receptors or inhibiting NMDA receptors, leading to a decrease in central nervous system activity. The depth of anesthesia can be rapidly adjusted by changing the concentration of the inhaled gas. Some common examples of inhalational anesthetics include volatile liquids like isoflurane, desflurane, sevoflurane and gases like xenon and nitrous oxide. Isoflurane, a...

Local Anesthetics: Clinical Application as Epidural Anesthesia

Local Anesthetics: Clinical Application as Epidural Anesthesia

Epidural anesthetics are administered in the fat-filled epidural space, the outermost part of the spinal canal. This technique is commonly employed for pain management and anesthesia during lower abdomen and pelvis surgeries or labor and delivery.
Since epidural anesthetics can be infused through an epidural catheter, all types of drugs, including short-acting ones, can be administered. Chloroprocaine and lidocaine are examples of short and long-duration anesthetics, respectively. Bupivacaine...

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[Do anesthetic techniques influence postoperative outcomes? Part II].

N Esteve¹, J Valdivia, A Ferrer

¹Servicio de Anestesiología, Reanimación y Terapia del Dolor, Hospital Universitario Son Espases, Palma de Mallorca, Islas Baleares, España. neus.esteve@ssib.es

Revista Espanola De Anestesiologia Y Reanimacion

|October 27, 2012

Summary

Anesthetic techniques significantly impact postoperative outcomes, influencing recovery, pain, and even cancer recurrence. Research explores protective strategies to minimize complications and improve patient recovery.

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Area of Science:

Anesthesiology
Surgical Outcomes Research

Background:

Anesthetic techniques' influence on postoperative outcomes is a growing research area.
This review focuses on controversies in 6 key areas: cognitive dysfunction, chronic pain, cancer recurrence, nausea/vomiting, surgical outcomes, and resource utilization.

Purpose of the Study:

To review major controversies regarding anesthetic techniques and postoperative outcomes.
To highlight areas for future research in protective and preventive anesthetic strategies.

Main Methods:

Literature review of current research on anesthetic techniques and postoperative outcomes.
Analysis of controversies in 6 specific clinical areas.

Main Results:

Anesthetic techniques impact cognitive function, chronic pain, and nausea/vomiting.
The influence on cancer recurrence remains controversial; perioperative fluid therapy may increase complications.
Normoglycemia and normothermia are linked to decreased morbidity; resource utilization is critical for cost-effectiveness.

Conclusions:

Protective anesthetic strategies are crucial for minimizing short and long-term complications.
Dynamic pain control is essential for accelerated recovery and preventing chronic pain.
Further research is needed to define anesthesia's role in immunosuppression and cancer recurrence.