The skin-to-calyx distance measured by renal ct scan and ultrasound.
Int Braz J Urol
; 40(2): 212-9, 2014.
Article
de En
| MEDLINE
| ID: mdl-24856488
ABSTRACT
PURPOSE:
We developed a stereotactic device to guide the puncture for percutaneous nephrolithotripsy, which uses the distance from the target calyx to its perpendicular point on skin (SCD) to calculate the needle´s entry angle. This study seeks to validate the use of measurements obtained by ultrasound (US) and computerized tomography (CT) for needle´s entry angle calculation and to study factors that may interfere in this procedure. MATERIALS ANDMETHODS:
Height, weight, abdominal circumference, CT of the urinary tract in dorsal decubitus (DD) and ventral decubitus (VD), and US of the kidneys in VD were obtained from thirty-five renal calculi patients. SCD obtained were compared and correlated with body-mass index (BMI).RESULTS:
BMI was 28.66 ± 4.6 Kg/m2. SCD on CT in DD was 8.40 ± 2.06cm, in VD was 8.32 ± 1.95cm, in US was 6.74 ± 1.68cm. SCD measured by US and CT were statistically different (p < 0.001), whereas between CT in DD and VD were not. SCD of the lower calyx presented moderate correlation with BMI.CONCLUSION:
SCD obtained by CT in ventral and dorsal decubitus may be used for calculation of the needle´s entry angle. SCD obtained by US cannot be used. A rule for the correlation between BMI and the SCD could not be determined.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Peau
/
Tomodensitométrie
/
Techniques stéréotaxiques
/
Calices rénaux
Type d'étude:
Diagnostic_studies
Limites:
Adolescent
/
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Langue:
En
Journal:
Int Braz J Urol
Sujet du journal:
UROLOGIA
Année:
2014
Type de document:
Article
Pays d'affiliation:
Brésil