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Pharmacokinetics in Pediatric Patients: Drug Metabolism01:24

Pharmacokinetics in Pediatric Patients: Drug Metabolism

In pediatric care, understanding the nuances of hepatic drug metabolism is crucial, as it significantly differs from that of adults. This divergence is primarily due to the developmental stage of drug-metabolizing enzymes, which affects how medications are processed in the body. In neonates, for instance, the activity of Phase I enzymes—critical for the initial breakdown of drugs—is markedly reduced, functioning at just 20–40% of the levels seen in adults. This reduction poses a challenge in...
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Chronopharmacokinetics: Time-Dependent Pharmacokinetics

Chronopharmacokinetics studies the temporal change in drug absorption and elimination. These changes can be cyclical or non-cyclical. Cyclical changes occur over a regular interval, while non-cyclical changes occur over a longer, irregular period.
Time-dependent pharmacokinetics refers to non-cyclical changes in drug rate processes over a period of time. It can lead to nonlinear pharmacokinetics, where the relationship between drug concentration and time is not proportional. Non-cyclical...
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Pharmacokinetics in Pediatric Patients: Overview and Drug Absorption

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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In pediatric medicine, understanding the renal function and drug elimination nuances is crucial for administering safe and effective treatments. Newborns, in particular, display markedly slower renal functions than adults, profoundly affecting how drugs are cleared from their bodies. This slower drug clearance requires clinicians to extend the dosing intervals for many medications to prevent drug accumulation and toxicity while ensuring therapeutic efficacy.One key area where these adjustments...
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Pharmacokinetics in Pediatric Patients: Drug Distribution

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, compared...
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The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.

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Gaze in Action: Head-mounted Eye Tracking of Children's Dynamic Visual Attention During Naturalistic Behavior
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Changes in American children's time - 1997 to 2003.

Sandra L Hofferth1

  • 1Department of Family Science, 1210E Marie Mount Hall, School of Public Health, University of Maryland, College Park 207423.

Electronic International Journal of Time Use Research
|September 21, 2010
PubMed
Summary

Children

Area of Science:

  • Sociology
  • Child Development
  • American Studies

Background:

  • The period 1997-2003 in the United States was marked by significant societal shifts, including welfare reform, educational policy changes, the 9/11 terrorist attacks, and a conservative turn in values.
  • These broad social changes potentially influenced the daily lives and activities of children.

Purpose of the Study:

  • To examine how children's time allocation changed between 1997 and 2003.
  • To correlate observed changes in children's activities with concurrent social and cultural trends in the United States.

Main Methods:

  • Analysis of children's time use data from 1997 to 2003.
  • Comparison of activity trends (studying, reading, sports, religious activities, outdoor play) during the specified period.

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Last Updated: Jun 8, 2026

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Published on: November 14, 2018

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Main Results:

  • A decline in children's discretionary time was observed.
  • Significant increases in time spent studying and reading, alongside a decrease in sports participation.
  • Upticks in religious and youth group activities, with a concurrent decline in outdoor activities.

Conclusions:

  • Changes in children's time use reflect broader societal trends, including increased academic focus and shifts in parental values.
  • The findings suggest a continuation of increased reading and studying, but a shift towards religious/youth activities over sports compared to previous decades.