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Related Concept Videos

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.
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General Anesthesia: Overview01:24

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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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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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Endotracheal Intubation II: Nursing Management01:17

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Endotracheal intubation is a critical procedure that can be lifesaving for many patients with respiratory distress or failure. The role of nursing in managing endotracheal tubes is pivotal, as it involves pre-intubation preparation, assisting during the procedure, and post-extubation care.
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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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Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy01:26

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Sigmoidoscopy and laparoscopy are distinct medical procedures that enable physicians to internally inspect different parts of the GI tract. Although they serve different purposes, each is essential for diagnosing and, in some cases, treating various medical conditions.
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Related Experiment Video

Updated: Apr 7, 2026

Laparoscopic Extracorporeal Knot-Tying for Uterine Vessel Occlusion during Hysterectomy with Cervical Cerclage in Large Uteri
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[A review on tocolysis].

P Rozenberg1

  • 1Unité de recherche EA 7285, département d'obstétrique et de gynécologie, université Versailles-Saint-Quentin, hôpital Poissy-Saint-Germain, 78303 Poissy cedex, France.

Journal De Gynecologie, Obstetrique Et Biologie De La Reproduction
|July 5, 2015
PubMed
Summary
This summary is machine-generated.

Tocolytic agents offer limited delay in preterm birth without neonatal benefits. Cyclo-oxygenase inhibitors and calcium channel blockers show the most efficacy, but short-term use is crucial due to side effects.

Keywords:
Antagonistes des récepteurs à l’ocytocineBetamimeticsBêtamimétiquesCalcium canal inhibitorsCyclo-oxygenase inhibitorsInhibiteurs de la cyclooxygénaseInhibiteurs du flux calciqueOxytocin receptors antagonistsPreterm labourTocolyseTocolysisTravail prématuré

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Area of Science:

  • Obstetrics and Gynecology
  • Pharmacology

Context:

  • Preterm birth remains a significant challenge in obstetrics.
  • Tocolytic agents are used to delay delivery, but their efficacy and safety profiles vary.
  • Limited neonatal benefits have been observed with current tocolytic therapies.

Purpose:

  • To evaluate the efficacy and safety of various tocolytic agents for delaying preterm delivery.
  • To compare the maternal and fetal tolerating profiles of different tocolytic drug classes.
  • To determine optimal usage guidelines for tocolytic agents in preterm labor.

Summary:

  • Tocolytic agents provide a short-term delay (48 hours to 7 days) in preterm delivery, primarily facilitating maternal transfer and fetal lung maturation.
  • Cyclo-oxygenase inhibitors and calcium channel blockers appear most effective, while betamimetics have the highest maternal side effect incidence.
  • Oxytocin receptor antagonists and cyclo-oxygenase inhibitors offer favorable maternal tolerance, and nifedipine shows the best fetal tolerance, though long-term fetal/neonatal effects require further investigation.
  • Combined or sequential tocolytic treatment offers no superior benefit over single-agent therapy and increases maternal adverse effects.
  • Optimal use is recommended between 24 and 34 weeks of gestation for short durations (24-72 hours) to maximize benefits and minimize risks.

Impact:

  • Highlights the limited efficacy of tocolytic agents in preventing preterm birth but underscores their critical role in enabling essential obstetric interventions.
  • Provides a comparative overview of tocolytic agents, guiding clinical decisions towards agents with better maternal and fetal tolerability.
  • Emphasizes the importance of short-term administration and specific gestational windows for tocolytic use to optimize outcomes and mitigate risks.