Creatinine for evaluation of glomerular filtration rate in children

Area of Science:

• Pediatric Nephrology
• Clinical Chemistry
• Renal Function Assessment

Background:

• Chronic kidney disease (CKD) is a significant health concern in adults, with early detection in childhood crucial for intervention.
• Delayed disease progression through early intervention can improve long-term outcomes.
• Accurate assessment of kidney function in pediatric populations is essential for timely diagnosis and management.

Purpose of the Study:

• To present a practical method for primary care physicians to identify pediatric patients with impaired kidney function.
• To compare measured glomerular filtration rate (GFR) with a calculated GFR in children.
• To establish clear referral criteria for pediatric nephrology evaluation.

Main Methods:

• Comparison of cimetidine clearance (measured GFR) with calculated GFR using height and serum creatinine.
• Analysis of 222 clearance studies conducted in 32 pediatric patients over an 8-year period.
• Evaluation of the diagnostic accuracy of calculated GFR for identifying reduced kidney function.

Main Results:

• A calculated GFR below 60 mL/min/1.73 m2 was found to be a significant indicator of impaired kidney function in children aged 1 year and older.
• The study validated the utility of calculated GFR as a screening tool.
• Data from 222 studies in 32 pediatric patients over 8 years informed the findings.

Conclusions:

• A calculated glomerular filtration rate (GFR) less than 60 mL/min/1.73 m2 is a reliable marker for identifying reduced kidney function in children aged one year and above.
• This finding provides primary care physicians with a straightforward method for referring children to pediatric nephrology.
• Early identification and referral are critical for managing pediatric kidney disease and potentially delaying progression.