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Related Concept Videos

Pulmonary Function Tests01:25

Pulmonary Function Tests

Pulmonary Function Tests (PFTs)
Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
PFTs involve using a spirometer, a...
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Drug Dosing: Infants and Children

Pediatric patient dosages diverge from adults due to disparities in body surface area, total body water, and extracellular fluid per kilogram of body weight. The dosing regimen considers the variations in pharmacokinetics and pharmacology across distinct age groups, encompassing preterm newborns, infants, young children, older children, and adolescents. Calculation of pediatric patient doses is predicated on determining body surface area, which exhibits a superior correlation with the child's...
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Drug Dosing in Renal Diseases: Estimation of Glomerular Filtration Rate Based on Serum Creatinine Concentration

Glomerular filtration rate (GFR) can be estimated from serum creatinine using the modification of diet in renal disease (MDRD) formula or the chronic kidney disease–epidemiology collaboration (CKD–EPI) equation. Both methods are widely used in clinical practice to assess kidney function and guide treatment decisions.The MDRD equation does not require weight or height measurements and is normalized to the body surface area of 1.73 m², considered the average adult surface area. This equation is...
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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, compared...
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Pharmacokinetics in Pediatric Patients: Drug Excretion

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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Reference equations for pulmonary function tests in preschool children: a review.

Sanja Stanojevic1, Angie Wade, Sooky Lum

  • 1Portex Respiratory Physiology Unit, UCL, Institute of Child Health, London, United Kingdom. s.stanojevic@ich.ucl.ac.uk

Pediatric Pulmonology
|August 30, 2007
PubMed
Summary

Objective respiratory function tests for preschool children are improving, but limited reference equations hinder their use. More standardized data and analysis are needed for accurate interpretation and early lung disease detection.

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Area of Science:

  • Pediatric Pulmonology
  • Respiratory Medicine
  • Biostatistics

Background:

  • Pulmonary function tests (PFTs) now allow objective respiratory assessments in preschool children (2-5 years).
  • The clinical utility of these PFTs is currently limited by a lack of appropriate reference equations.
  • Existing reference equations show considerable variability in methodology and population characteristics.

Purpose of the Study:

  • To review available reference equations for PFTs in preschool children.
  • To identify limitations in current methodologies and statistical approaches for these equations.
  • To propose future directions for improving preschool PFT reference data.

Main Methods:

  • A systematic PubMed search using MeSH terms: preschool, respiratory function test, and reference value.
  • Screening of 214 publications to identify 34 presenting 36 reference equations across seven techniques.
  • Analysis of differences in population characteristics, recruitment, equipment, and methodologies.

Main Results:

  • Significant heterogeneity exists in population characteristics, recruitment strategies, equipment, and methodologies among published reference equations.
  • Generalizability of existing equations may be limited by small sample sizes (especially <5 years), lack of detailed reporting, and inappropriate statistical methods.
  • Despite an increase in available equations, substantial gaps and limitations persist.

Conclusions:

  • There is a critical need for a standardized approach to developing preschool PFT reference equations.
  • Future efforts should focus on large, well-documented sample populations, standardized protocols, and advanced statistical methods.
  • Improved reference data will enhance the clinical application of PFTs, enabling earlier detection of lung disease in young children.