What question did this study set out to answer?

To develop and evaluate a simplified formula for calculating 51Cr-EDTA clearance in pediatric patients using a single plasma sample.

February 1, 1984Clinical Physiology

Calculation of ⁵¹Cr‐EDTA clearance in children from the activity in one plasma sample by transformation of the biexponential plasma time‐activity curve into a monoexponential with identical integral area below the time‐activity curve

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Why the study?

Does a single-sample formula accurately estimate 51Cr-EDTA clearance compared to the standard method in children?

Population

Children

Comparison

Calculation of 51Cr-EDTA clearance from one… vs 51Cr-EDTA clearance calculated by means of a…

Authors

SGS. GrothBrighton and Sussex Medical School

Discussion

Member takes

Implication

May simplify pediatric GFR estimation with fewer samples; leaves open prospective validation before clinical adoption.

Key Points

To develop and evaluate a simplified formula for calculating 51Cr-EDTA clearance in pediatric patients using a single plasma sample.
Derived mathematical functions, s(t) and g(t), to convert biexponential plasma time-activity curves into monoexponential curves with identical integral areas under the curve.
Empirically determined the time-dependent variation of g(t) to establish a single-sample clearance formula (ClST) for plasma taken between 90 and 150 minutes post-injection.
Single-sample 51Cr-EDTA clearance (ClST) correlated closely with standard multi-sample clearance values (r = 0.991).

Structured PICO

Does a single-sample formula accurately estimate 51Cr-EDTA clearance compared to the standard method in children?

Population

Children

Intervention

Calculation of 51Cr-EDTA clearance from one single plasma sample withdrawn between 90 and 150 min after injection using a derived formula

Comparator

51Cr-EDTA clearance calculated by means of a standard method

Outcome

Agreement between single-sample clearance and standard method clearancesurrogate

A derived formula allows for accurate calculation of 51Cr-EDTA clearance in children using only a single plasma sample, simplifying the procedure.

Cite This Study

S. Groth (1984) studied this question.

synapsesocial.com/papers/6a82bc3baab30c8fb7b2860a https://doi.org/10.1111/j.1475-097x.1984.tb00645.x

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Calculation of ⁵¹Cr‐EDTA clearance in children from the activity in one plasma sample by transformation of the biexponential plasma time‐activity curve into a monoexponential with identical integral area below the time‐activity curve

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Calculation of ⁵¹Cr‐EDTA clearance in children from the activity in one plasma sample by transformation of the biexponential plasma time‐activity curve into a monoexponential with identical integral area below the time‐activity curve

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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Also Consider