Related Experiment Video
Updated: May 22, 2026

Transdermal Measurement of Glomerular Filtration Rate in Mechanically Ventilated Piglets
Published on: September 13, 2022
Glomerular function in neonates.
Rozita Hoseini1, Hasan Otukesh, Nahid Rahimzadeh
1Ali Asghar Children Hospital, Tehran University of Medical Sciences, Tehran, Iran. rozitahoseini@yahoo.com
Glomerular filtration rate (GFR) in newborns is low but increases with age. While serum creatinine is common, cystatin C shows promise as a more stable marker for neonatal kidney function, though more research is needed.
Area of Science:
- Neonatal Physiology
- Pediatric Nephrology
- Biomarkers of Kidney Function
Background:
- Glomerular filtration rate (GFR) is significantly lower in fetal and neonatal periods, gradually increasing after birth.
- Established methods for measuring neonatal GFR include inulin clearance and creatinine clearance.
- Serum creatinine levels are affected by factors like muscle mass and tubular handling, prompting a search for more reliable markers.
Purpose of the Study:
- To evaluate the potential of serum cystatin C as a stable and reliable marker for assessing kidney function in neonates.
- To address the limitations and limited research surrounding cystatin C use in newborn infants.
- To determine the need for further studies on cystatin C's normal range and its efficacy compared to traditional markers.
Main Methods:
- Review of existing literature on glomerular filtration rate measurement in neonates.
- Analysis of the characteristics of serum cystatin C as a potential biomarker.
- Identification of research gaps concerning cystatin C in neonatal kidney function assessment.
Main Results:
- Serum cystatin C possesses characteristics making it a potentially stable marker, independent of muscle mass and tubular secretion.
- Current research on cystatin C in neonates is limited, with insufficient data on its normal range.
- Existing methods like creatinine clearance have limitations due to various influencing factors.
Conclusions:
- Further research is essential to establish normal cystatin C levels in neonates.
- Investigating cystatin C's ability to replace serum creatinine as a primary kidney function test in newborns is warranted.
- Exploration of novel kidney function tests for newborn infants should be prioritized.
Related Concept Videos
Pharmacokinetics in Pediatric Patients: Drug Metabolism
Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate
Physiology of the Genitourinary System I: Renal Blood Flow and Glomerular Filtration
Glomerular Filtration Rate and its Regulation
GFR regulation involves two primary intrinsic controls: the myogenic and tubuloglomerular feedback mechanisms.
The myogenic...
Renal Drug Excretion: Glomerular Filtration
Drugs gain access to the kidney via the renal artery, which progressively branches off into afferent arterioles.
Pharmacokinetics in Pediatric Patients: Drug Distribution

