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Related Concept Videos

Parenteral Anesthetics: Overview01:24

Parenteral Anesthetics: Overview

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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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Pharmacokinetics in Pediatric Patients: Drug Distribution01:17

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Drug distribution in the pediatric population exhibits unique challenges and considerations due to the physiological differences between children, particularly neonates and infants, and adults. A crucial aspect of pediatric pharmacology is understanding how these differences impact the pharmacokinetics of various drugs, necessitating age-specific dosing strategies to ensure efficacy and safety.Neonates and infants have a higher total body water content, ~75%–90% of their body weight,...
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Pharmacokinetics in Pediatric Patients: Overview and Drug Absorption01:23

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Understanding the physiological differences in the pediatric population is crucial for effective pharmacotherapy. Neonates, infants, and children exhibit significant variations in gastric pH, gastric emptying time, intestinal transit time, and biliary function. These variations profoundly affect oral drug absorption, necessitating a nuanced approach to pediatric dosing.Neonates present with a unique physiological profile, having a gastric pH greater than 4 and faster and more irregular gastric...
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Factors Affecting Drug Distribution: Organ Perfusion Rate01:15

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Drug distribution within the body is a complex process influenced by several factors, including perfusion rate, the rate at which the bloodstream transports drugs to tissue. This limitation becomes particularly significant when dealing with highly lipophilic drugs. In such cases, the rate at which the drug can move across membranes is crucial, and if the membrane is highly permeable to the drug, distribution becomes rate-limited by perfusion.
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Inhalational Anesthetics: Overview01:20

Inhalational Anesthetics: Overview

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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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Nonlinear Pharmacokinetics: Dependence of Elimination Half-Life and Dose Clearance01:23

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The elimination half-life and drug clearance of drugs following nonlinear kinetics can vary with dosage. The Michaelis-Menten parameters and drug concentration influence these factors. As the dose increases, the elimination half-life tends to lengthen, resulting in a reduction in clearance and a disproportionately larger area under the curve. The total clearance can be derived from the Michaelis-Menten equation for drugs following a one-compartment model.
A study on guinea pigs examined the...
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Development of a Neonatal Piglet Acute Lung Injury Model Recreating the Early Environment of Preterm Infant Lungs
08:58

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Propofol in neonates causes a dose-dependent profound and protracted decrease in blood pressure.

Ellen H M de Kort1,2, Jos W R Twisk3, Ellen P G van T Verlaat2

  • 1Division of Neonatology, Department of Pediatrics, Máxima Medical Center, Veldhoven, The Netherlands.

Acta Paediatrica (Oslo, Norway : 1992)
|April 6, 2020
PubMed
Summary
This summary is machine-generated.

Propofol premedication for endotracheal intubation in neonates causes a dose-dependent blood pressure drop. Lower starting doses are recommended to minimize profound and prolonged hypotension, ensuring safer administration.

Keywords:
blood pressurehypotensionneonatepremedicationpropofol

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Area of Science:

  • Anesthesiology and Critical Care
  • Neonatal Medicine
  • Pharmacology

Background:

  • Endotracheal intubation is a common procedure in neonates.
  • Propofol is frequently used for sedation during intubation.
  • The effects of varying propofol doses on neonatal hemodynamics require careful evaluation.

Purpose of the Study:

  • To analyze the impact of different propofol starting doses on neonatal blood pressure.
  • To determine the relationship between propofol dosage and hemodynamic changes in neonates.

Main Methods:

  • Retrospective analysis of neonates from a previous dose-finding study.
  • Inclusion of neonates who received propofol starting doses of 1.0, 1.5, or 2.0 mg/kg.
  • Monitoring and analysis of blood pressure for 60 minutes post-propofol administration.

Main Results:

  • Blood pressure decreased in all propofol dosing groups.
  • The most significant blood pressure decline was observed in the 2.0 mg/kg group.
  • Hypotension persisted for up to 60 minutes and was primarily linked to the initial propofol dose.

Conclusions:

  • Propofol administration results in a dose-dependent, profound, and prolonged decrease in blood pressure in neonates.
  • Careful consideration of propofol use is warranted.
  • Initiating propofol at a low dose and titrating to effect is the safest strategy.