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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...

Local Anesthetics: Common Agents and Their Applications

Local Anesthetics: Common Agents and Their Applications

Local anesthetics (LAs) are commonly used for various applications in medical and dental procedures. Some of the common agents used are cocaine, lidocaine, and bupivacaine.
Cocaine is an ester of benzoic acid and methylecgogine. It is used to anesthetize and vasoconstrict locally. Currently, it is used primarily for topical applications. It is beneficial for surgeries on the upper respiratory tract, providing anesthesia and shrinking the mucosa. Cocaine in the form of cocaine hydrochloride is...

Local Anesthetics: Clinical Application as Spinal Anesthesia

Local Anesthetics: Clinical Application as Spinal Anesthesia

Spinal anesthetics are given during lower abdomen and limb surgeries to block sensory and motor neurons. They are administered in the mid to low lumbar regions, primarily acting on the cauda equina's nerve roots. The blockade level depends on the local anesthetic (LA) concentration. Usually, low LA concentrations are sufficient to block sensory fibers, while only high LA concentrations block motor fibers. Other factors like injection volume and speed, the patient's posture, and the drug...

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...

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...

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.

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Related Experiment Video

Updated: Jun 22, 2026

Proper Positioning and Restraint of a Rat Hind Limb for Focused High Resolution Imaging of Bone Micro-architecture Using In Vivo Micro-computed Tomography

Proper Positioning and Restraint of a Rat Hind Limb for Focused High Resolution Imaging of Bone Micro-architecture Using In Vivo Micro-computed Tomography

Published on: November 22, 2017

[Anesthesia in the afro-american population].

Nilton Bezerra do Vale¹, José Delfino

¹Universidade Federal do Rio Grande do Norte, Brazil.

Revista Brasileira De Anestesiologia

|May 29, 2009

Summary

This summary is machine-generated.

Anesthetic drug responses can differ in patients of African descent due to genetic and environmental factors. Recognizing these racial differences is crucial for safe anesthesia and successful surgical outcomes.

Related Experiment Videos

Last Updated: Jun 22, 2026

Proper Positioning and Restraint of a Rat Hind Limb for Focused High Resolution Imaging of Bone Micro-architecture Using In Vivo Micro-computed Tomography

Proper Positioning and Restraint of a Rat Hind Limb for Focused High Resolution Imaging of Bone Micro-architecture Using In Vivo Micro-computed Tomography

Published on: November 22, 2017

Area of Science:

Anesthesiology
Pharmacogenetics
Medical Anthropology

Context:

Significant physiological and pharmacological variations exist in Afro-American populations that may impact anesthesia.
Historical migration, genetics, and socio-environmental factors contribute to distinct pathophysiological profiles in Afro-Americans compared to Caucasians.
These differences influence various organ systems, including the central nervous system (CNS), cardiovascular system (CVS), respiratory, and renal systems.

Purpose:

To re-evaluate potential biases related to racial differences in the effects of anesthetic drugs and adjuvants.
To highlight how genetic and environmental factors unique to Afro-American populations can alter anesthetic drug efficacy and safety.
To inform preanesthetic evaluations by considering race as a factor in drug response.

Summary:

Anesthetic drug responses vary due to biological, genetic, cultural, and environmental factors.
Specific drug effects differ in Afro-Americans, including reduced local anesthetic efficacy (EMLA), enhanced propofol effects, altered responses to antihypertensives (ACEI, beta-blockers, AT1), and modified fibrinolysis (t-PA).
These variations necessitate tailored anesthetic and surgical approaches, particularly for patients with hypertension, renal issues, asthma, or stroke.

Impact:

Incorporating racial considerations into preanesthetic evaluations can prevent perioperative idiosyncratic reactions.
Optimizing anesthetic management based on population-specific responses enhances patient safety.
Ensuring anesthetic-surgical success requires a comprehensive understanding of how diverse patient backgrounds influence drug interactions and physiological responses.