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Related Experiment Videos

Estimating vaginal blood loss.

D A Grimes

    The Journal of Reproductive Medicine
    |April 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Estimating vaginal bleeding by counting sanitary products is unreliable. The study found significant, clinically relevant variations in blood absorption capacity among different products and even within the same package.

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    Area of Science:

    • Gynecology
    • Medical Devices
    • Clinical Measurement

    Background:

    • Obstetrician-gynecologists traditionally estimate vaginal bleeding by asking patients about sanitary product usage.
    • This method assumes uniform and known blood absorption capacities for menstrual products.
    • The clinical utility of this estimation technique has not been rigorously evaluated.

    Purpose of the Study:

    • To evaluate the accuracy of estimating vaginal bleeding based on sanitary product use.
    • To measure the blood absorption capacity of commercially available sanitary products.
    • To determine if product absorbency is consistent and clinically reliable.

    Main Methods:

    • Quantified the blood absorption capacity of 15 different commercial sanitary products.

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  • Utilized a one-way analysis of variance (ANOVA) to compare mean absorption volumes.
  • Assessed variability in absorbency both between different product types and within individual product packages.

    • Main Results:

    • Mean blood absorption capacities varied significantly across products, ranging from 1.32 ml to 94.86 ml.
    • Statistical analysis (p < .001) confirmed significant differences in mean absorption volumes between products.
    • Substantial variations in absorbency were observed even among products from the same package.

    Conclusions:

    • The assumption of equivalent and known blood absorption by sanitary products is invalid.
    • Estimating vaginal bleeding volume based on the number of sanitary products used is unlikely to yield clinically useful data.
    • Questions regarding sanitary product count should be removed from routine gynecologic history taking.