Critical size of kidney stone through ureter: A mechanical analysis.
J Mech Behav Biomed Mater
; 135: 105432, 2022 11.
Article
in En
| MEDLINE
| ID: mdl-36115174
ABSTRACT
Blockage of ureter caused by kidney stone, accompanied by severe pain/infections, is a high incidence urinary tract disease that has received extensive attention. Currently, in clinics, a kidney stone with diameter less than â¼5 mm is considered capable of passing through ureter. However, this critical size (â¼5 mm) is empirically based, lacking quantitative analysis. In this study, we proposed a stone-ureter interaction model to quantificationally estimate the critical size of kidney stone passing through ureter. We revealed that the critical size of kidney stone is related to ureter size, about 11%-22% larger than the inner diameter of ureter. Further, based upon the Winkler elastic foundation beam model, we developed a simplified stone-ureter interaction model to evaluate how this critical size is dependent upon the stiffness of ureter and the surface roughness of kidney stone. The proposed model may help urologists improve the accuracy of personalized diagnosis and treatment.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Ureter
/
Kidney Calculi
Limits:
Humans
Language:
En
Journal:
J Mech Behav Biomed Mater
Journal subject:
ENGENHARIA BIOMEDICA
Year:
2022
Document type:
Article
Affiliation country: