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Analgesia and Pain Management

Analgesia and Pain Management

Pain is critical to various clinical pathologies, provoking an urgent need for effective management. Pain, whether acute or chronic, is a complex neurochemical process. Its alleviation depends on the type, with nonopioid analgesics effective for mild to moderate pain, such as musculoskeletal or inflammatory pain, while neuropathic pain responds best to anticonvulsants, tricyclic antidepressants, or serotonin/norepinephrine reuptake inhibitors. For severe acute or chronic pain, opioids may be...

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...

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: Differential Sensitivity of Nerve Fibers

Local Anesthetics: Differential Sensitivity of Nerve Fibers

Local anesthetics (LAs) block the sodium channels of nerve trunks, sensory nerve endings, and neuromuscular junctions. Although LAs can block all kinds of nerves, the sensitivity of nerve fibers differs according to nerve types and structures. LAs are known to block myelinated fibers faster than unmyelinated ones. Also, they block pain or sensory neurons at low concentrations without affecting the motor neurons involved in muscle contractions. This helps relieve labor pain without affecting the...

Opioid Analgesics: Synthetic and Semisynthetic Opioids

Opioid Analgesics: Synthetic and Semisynthetic Opioids

Synthetic and semisynthetic opioids are pivotal in pain management and tackling opioid addiction. Semisynthetic opioids, including morphinans (morphine derivatives), oxycodone, oxymorphone, hydrocodone, and hydromorphone, have improved pharmacokinetic profiles compared to morphine. Additionally, heroin and 6-MAM (6-Monoacetylmorphine) show better CNS penetration than morphine due to heightened lipid solubility. Hydromorphone, a potent opioid, undergoes hepatic metabolism to form the active...

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...

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Related Experiment Video

Updated: Jun 5, 2026

Electrophysiological Methods to Assess Peripheral Pain Block in an Anesthetized Rat

Electrophysiological Methods to Assess Peripheral Pain Block in an Anesthetized Rat

Published on: November 21, 2025

Labour analgesia: Recent advances.

Sunil T Pandya¹

¹Department of Anaesthesia, Pain and Critical Care, Fernandez Hospital (Hospital for Women and Newborns) and Prerna Anaesthesia and Critical Care Services Pvt. Ltd., Hyderabad - 500 001, India.

Indian Journal of Anaesthesia

|December 31, 2010

Summary

Modern labor analgesia offers comprehensive pain management, utilizing advanced techniques and medications. Evidence debunks myths linking epidurals to increased C-sections or backache, improving maternal and fetal safety.

Keywords:

Ambulatory epidurals labour analgesia recent advances

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Electrophysiological Methods to Assess Peripheral Pain Block in an Anesthetized Rat

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Spinal Sonography for Ultrasound-Guided Lumbar Neuraxial Anesthesia

Spinal Sonography for Ultrasound-Guided Lumbar Neuraxial Anesthesia

Published on: January 31, 2025

Area of Science:

Obstetrics and Gynecology
Anesthesiology
Pain Management

Background:

Labor analgesia has evolved significantly from early anesthetic agents to modern evidence-based practices.
Recent advancements include combined spinal epidurals, low-dose epidurals, and patient-controlled analgesia options.

Purpose of the Study:

To review the revolutionary advances in labor pain management.
To highlight technological and pharmacological innovations improving parturient care.

Main Methods:

Review of recent randomized controlled trials and Cochrane studies.
Analysis of pharmacological and technological advancements in labor analgesia.

Main Results:

Newer labor analgesia techniques, including epidurals, do not increase C-section rates or long-term backache.
Low-dose epidural regimens show no significant impact on labor duration or breastfeeding.
Ultrasound guidance and patient-controlled epidural analgesia (PCEA) improve success rates and patient satisfaction.

Conclusions:

Modern labor analgesia is safe and effective, debunking previous concerns.
Technological and pharmacological advances enhance maternal satisfaction and safety during childbirth.
Individualized analgesic regimens can be customized for each parturient.