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Local Anesthetics: Clinical Application as Epidural Anesthesia01:29

Local Anesthetics: Clinical Application as Epidural Anesthesia

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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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Parenteral Anesthetics: Overview01:24

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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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General Anesthesia: Overview01:24

General Anesthesia: Overview

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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.
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Inhalational Anesthetics: Overview01:20

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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...
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Local Anesthetics: Clinical Application as Surface, Infiltration, and Conduction Block Anesthesia01:30

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Depending on the target organ, local anesthetics (LAs) can be administered via various routes. In surface anesthesia, LAs are applied directly to the surface of the skin or mucous membranes. It is widely used for topical skin numbing before venipuncture or minor surgical procedures. Commonly used surface local anesthetics are lidocaine or benzocaine sprays or creams. Surface anesthesia occurs within 5 minutes and lasts for about 60 minutes. One of the main disadvantages of topical anesthesia is...
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Local Anesthetics: Clinical Application as Spinal Anesthesia01:11

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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...
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Advances in Anesthesia Delivery in the Deployed Setting.

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Combat casualty care has advanced, with total intravenous anesthesia (TIVA) emerging as a valuable alternative to volatile gases for trauma resuscitation in deployed settings. Future focus should be on TIVA for safe anesthesia in austere environments.

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Area of Science:

  • Anesthesiology
  • Trauma Surgery
  • Military Medicine

Background:

  • Combat casualty management has evolved significantly over 15 years, influencing trauma anesthesia practices.
  • Early deployable anesthesia relied on balanced techniques using volatile gases and IV adjuncts.
  • Modern warfare demands mobile surgical capabilities with reduced logistical needs.

Purpose of the Study:

  • To highlight the advantages of total intravenous anesthesia (TIVA) in deployed settings.
  • To advocate for TIVA as a safe alternative for trauma management and resuscitation.
  • To emphasize the need for future research and education on TIVA in austere environments.

Main Methods:

  • Review of lessons learned in combat casualty management.
  • Analysis of advancements in anesthesia equipment for deployed settings.
  • Comparison of TIVA with volatile gas anesthesia in trauma care.

Main Results:

  • Total intravenous anesthesia (TIVA) offers significant advantages for trauma management and resuscitation in deployed environments.
  • Despite advancements in volatile anesthetic delivery, TIVA is recognized as a valuable alternative by experienced providers.
  • The military's focus has been on lighter, more mobile volatile gas delivery systems.

Conclusions:

  • TIVA presents a compelling option for anesthesia in austere combat environments.
  • Future efforts in research, development, and education should prioritize TIVA.
  • Adapting to future conflicts requires retaining lessons learned and innovating casualty management solutions.