RONALDO HUEB BARONI
Projetos de Pesquisa
Unidades Organizacionais
LIM/44 - Laboratório de Ressonância Magnética em Neurorradiologia, Hospital das Clínicas, Faculdade de Medicina
2 resultados
Resultados de Busca
Agora exibindo 1 - 2 de 2
- The skin-to-calyx distance measured by renal ct scan and ultrasound(2014) SHAN, Chen Jen; MAZZUCCHI, Eduardo; PAYAO, Fabio; GOMES, Andrea Cavalanti; BARONI, Ronaldo Hueb; TORRICELLI, Fabio Cesar; VICENTINI, Fabio Carvalho; SROUGI, MiguelPurpose: 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 and Methods: 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/m(2). 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.
- Nephrocalcinosis and Nephrolithiasis in X-Linked Hypophosphatemic Rickets: Diagnostic Imaging and Risk Factors(2019) COLARES NETO, Guido de Paula; YAMAUCHI, Fernando Ide; BARONI, Ronaldo Hueb; BIANCHI, Marco de Andrade; GOMES, Andrea Cavalanti; CHAMMAS, Maria Cristina; MARTIN, Regina MatsunagaContext: Nephrocalcinosis (NC) and nephrolithiasis (NL) are described in hypophosphatemic rickets, but data regarding their prevalence rates and the presence of metabolic risk factors in X-linked hypophosphatemic rickets (XLH) are scarce. Objective: To determine the prevalence rates of NC and NL and their risk factors in patients with XLH with confirmed PHEX mutations. Methods: Renal ultrasonography (US) and CT were performed in 16 children and 23 adults. The images were evaluated by two blinded radiologists specializing in US and two specializing in CT. Confirmation of NC was determined with a positive result on both US and CT, whereas the diagnosis of NL was confirmed by CT alone. The presence of hypercalciuria, hypocitraturia, and hyperoxaluria was determined from 24-hour urinary samples from each patient. The glomerular filtration rate was estimated. Results: NC was identified in 15 patients (38.4%), and stratification by age group showed a higher prevalence of NC in children than in adults (56.2% vs 26.1%). CT identified NL in four adults (10.2%). Patients in the pediatric group required intensive use of phosphate, started treatment earlier, and presented greater phosphaturia than those in the adult group (P < 0.01). In addition to hyperphosphaturia, which was present in all patients with XLH, hypocitraturia was the most common metabolic factor (28.2%), where as hypercalciuria occurred in two patients (5.1%). None had hyperoxaluria. Most patients had normal renal function. Conclusions: NCwas more prevalent than NL. The main metabolic factor was hyperphosphaturia, and intensive phosphate treatment appears to be a worsening factor for kidney calcification.