The Bristol stool scale is a diagnostic medical tool designed to classify the form of human faeces into seven categories.It is used in both clinical and experimental fields. It was developed at the Bristol Royal Infirmary as a clinical assessment tool in 1997, and is widely used as a research tool to evaluate the effectiveness of treatments for various diseases of the bowel, as well as a clinical communication aid;Bristol scale stool form. A still valid help in medical practice and clinical research G Riegler, I Esposito – Techniques in coloproctology, 2001 – Springer including being part of the diagnostic triad for irritable bowel syndrome . 
Infobox diagnostic | name = Bristol stool scale | image = BristolStoolChart (cropped).png | alt = | caption = Bristol stool chart | pronounce = | purpose = classify type of feces ( diagnostic triad for irritable bowel syndrome ) | test of = | based on = | synonyms = Bristol stool chart (BSC),<ref> cite journal|vauthors=Amarenco G|title=Bristol Stool Chart: étude
R
The
Infobox diagnostic | name =
D
is a diagnostic medical tool designed to classify the form of human faeces into seven categories.It is used in both clinical and experimental fields.
R
It was developed at the Bristol Royal Infirmary as a clinical assessment tool in 1997, and is widely used as a research tool to evaluate the effectiveness of treatments for various diseases of the bowel, as well as a clinical communication aid;Bristol scale stool form. A still valid help in medical practice and clinical research G Riegler, I Esposito – Techniques in coloproctology, 2001 – Springer including being part of the
| image = BristolStoolChart (cropped).png | alt = | caption = Bristol stool chart | pronounce = | purpose = classify type of feces (
R
.
) | test of = | based on = | synonyms = Bristol stool chart (BSC),<ref>
A
cite journal|vauthors=Amarenco G|title=Bristol Stool Chart: étude