scholarly journals Evaluation of kidney size in children: a pilot study of renal length as a surrogate of organ growth

2012 ◽  
Vol 55 (2) ◽  
pp. 54 ◽  
Author(s):  
Boo Won Kim ◽  
Min Kyoung Song ◽  
Sochung Chung ◽  
Kyo Sun Kim
Keyword(s):  
Pilot Study ◽  
Kidney Size ◽  
Organ Growth ◽  
Renal Length

scholarly journals Normal variance in renal size in relation to body habitus

2011 ◽  
Vol 15 (4) ◽  
pp. 123 ◽  
Author(s):  
Werner S Harmse
Keyword(s):  
Body Weight ◽  
Normal Serum ◽  
Kidney Size ◽  
Renal Masses ◽  
Body Habitus ◽  
Race And Gender ◽  
Normal Ranges ◽  
Renal Size ◽  
And Gender ◽  
Renal Length

Objective. Renal length determination is common in everyday radiology practice. However, a normal range of kidney sizes may not apply to people of all body habitus. This study investigates this relationship in order to determine normal ranges in relation to body habitus. A secondary aim was to evaluate the relationship of renal size to gender and race. Methods. Kidney lengths were measured on oblique coronal reformatted CT images of 514 patients who received routine abdominal CT scans for conditions unrelated to renal pathology. The patients had normal serum creatinine levels, no history of renal disease, no renal masses, and normal-appearing kidneys on CT. Weight, height, race and gender of the patients were recorded. Results. The mean renal length was 108 mm with a standard deviation of 9.82 mm. Statistical analysis demonstrated a relationship between kidney size and body weight and height, both individually and collectively. The most accurate prediction model was ‘kidney size = 49.18 + 0.21 x weight + 0.27 x height’, with a R2-value of 0.32. Additionally, kidneys were generally larger in the white population than in the black, and also in males than females. Conclusion. Normal renal size varies according to patients' body habitus. This variation can be expressed as a function of body weight and height, which can be represented by a nomogram and used as an easy reference in clinical practice.

Intraobserver and Interobserver Variations in Sonographic Measurements of Kidney Size in Adult Volunteers

1995 ◽  
Vol 36 (4-6) ◽  
pp. 399-401 ◽  
Author(s):  
S. A. Emamian ◽  
M. B. Nielsen ◽  
J. F. Pedersen
Keyword(s):  
Cortical Thickness ◽  
Observer Variation ◽  
Repeated Measurements ◽  
Volume Estimation ◽  
Length Measurement ◽  
Kidney Size ◽  
The Difference ◽  
Adult Volunteers ◽  
Renal Length ◽  
Interobserver Variations

Estimation of renal size by sonography can be performed by measuring renal length, volume, cortical volume or cortical thickness. Observer variation in these measurements is an important factor, especially when repeated measurements are compared. This study was performed to examine the magnitude of intraobserver and interobserver variations for each of the above-mentioned measurements, and to find the measurement with the lowest observer variation. Sonographic measurements were performed by 3 observers on 18 adult volunteers. The standard deviation of the difference (SDD) between any 2 pairs of measurements was used as the indicator of the magnitude of the observer variation. Renal length measurement showed the lowest observer variation with a relative SDD of 4 to 5%. Measurement of cortical thickness showed the poorest reproducibility with a relative SDD of 18 to 23%, while volumetric estimations had a relative SDD of 14 to 17%. Renal length measurement should be preferred to renal volume estimation, especially when comparing repeated measurements.

scholarly journals Assessment of Renal Volume with MRI: Experimental Protocol

2021 ◽  
pp. 369-382
Author(s):  
Andreas Müller ◽  
Martin Meier
Keyword(s):  
Diabetes Mellitus ◽  
Kidney Disease ◽  
Animal Models ◽  
Renal Artery ◽  
Renal Artery Stenosis ◽  
Kidney Volume ◽  
Renal Volume ◽  
Total Kidney Volume ◽  
Kidney Size ◽  
Renal Length

AbstractRenal length and volume are important parameters in the clinical assessment of patients with diabetes mellitus, kidney transplants, or renal artery stenosis. Kidney size is used in primary diagnostics to differentiate between acute (rather swollen kidneys) and chronic (rather small kidney) pathophysiology. Total kidney volume is also an established biomarker in studies for the treatment of autosomal dominant polycystic kidney disease (ADPKD). There are several factors influencing kidney size, and there is still a debate on the value of the measured kidney size in terms of renal function or cardiovascular risk. The renal volume is most often calculated by measuring the three axes of the kidney, on the assumption that the organ resembles an ellipsoid. By default, the longitudinal and transverse diameters of the kidney are measured. In animal models renal length and volume1 are also important parameters in the assessment of organ rejection after transplantation and in determination of kidney failure due to renal artery stenosis, recurrent urinary tract infections, or diabetes mellitus. In general total kidney volume (TKV) is a valuable parameter for predicting prognosis and monitoring disease progression in animal models of human diseases like polycystic kidney disease (PKD) or acute kidney injury (AKI) and chronic kidney disease (CKD).This chapter is based upon work from the COST Action PARENCHIMA, a community-driven network funded by the European Cooperation in Science and Technology (COST) program of the European Union, which aims to improve the reproducibility and standardization of renal MRI biomarkers. This analysis protocol is complemented by two separate chapters describing the basic concept and experimental procedure.

scholarly journals MO181ULTRASOUND ASSESSMENT OF KIDNEY SIZE AND ITS CORRELATION WITH BODY MASS INDEX IN HEALTHY VOLUNTEERS WITHOUT RENAL DISEASE

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
Nazma Mohammed ◽  
Muzamil Latief ◽  
Manzoor Parry ◽  
Manjusha Yadla
Keyword(s):  
Body Mass Index ◽  
Healthy Volunteers ◽  
Body Mass ◽  
Cortical Thickness ◽  
Left Kidney ◽  
Kidney Size ◽  
Positive Correlation ◽  
Kidney Length ◽  
Study Population ◽  
Renal Length

Abstract Background and Aims Renal length as well as renal cortical thickness has been closely related to creatinine clearance in patients with chronic kidney disease. Our primary aim was to establish a normal range of values for kidney length in our adult population with normal renal function. Method This was a prospective observational study. Ultrasonographic assessment of renal parameters in 499 healthy volunteers between 18 to 80 years of age was done. Volunteers with any known renal condition or any co-morbidity were excluded from the study population. Correlation between body mass index (BMI) and renal parameters was assessed. Results Out of 499 volunteers 327 (65%) were males and 172(35%) were females. 17.8% volunteers were less than 30 years of age, 51.5% volunteers were in the age group of 30-60 years and 30.7 % were above 60 years of age. Mean BMI in males was 25.20 ± 3.96 kg/m2 whereas mean BMI in females was 24.08 ± 3.28 kg/m2. In males the mean cortical thickness in right kidney was 13.68+/- 2.47 mm and in left kidney cortical thickness was 13.94 ± 2.6 mm. In females right kidney cortical thickness was 12.63 ± 1.91 mm and left kidney cortical thickness was 13.40 ± 2.37 mm. In the present study the right mean renal length was 9.9 ± 40cm and left renal length was 10.19 ± 0.97cm. In our study, there was positive correlation BMI with renal length. Conclusion Size of kidney has significant ethnic and geographic basis and there is a positive correlation between BMI and kidney size in our study population.

Pilot study on criteria in cavity preparation-facts or artifacts?

1973 ◽  
Vol 37 (11) ◽  
pp. 27-31 ◽  
Author(s):  
G Salvendy ◽  
WM Hinton ◽  
GW Ferguson ◽  
PR Cunningham
Keyword(s):  
Pilot Study ◽  
Cavity Preparation

A Pilot Study of Early Storybook Reading With Babies With Hearing Loss

2019 ◽  
Vol 62 (9) ◽  
pp. 3397-3412
Author(s):  
Michelle I. Brown ◽  
David Trembath ◽  
Marleen F. Westerveld ◽  
Gail T. Gillon
Keyword(s):  
Hearing Loss ◽  
Pilot Study ◽  
Visual Analysis ◽  
Single Case ◽  
Eye Contact ◽  
Preliminary Evidence ◽  
Storybook Reading ◽  
Book Selection ◽  
Turn Taking ◽  
Parent Child

Purpose This pilot study explored the effectiveness of an early storybook reading (ESR) intervention for parents with babies with hearing loss (HL) for improving (a) parents' book selection skills, (b) parent–child eye contact, and (c) parent–child turn-taking. Advancing research into ESR, this study examined whether the benefits from an ESR intervention reported for babies without HL were also observed in babies with HL. Method Four mother–baby dyads participated in a multiple baseline single-case experimental design across behaviors. Treatment effects for parents' book selection skills, parent–child eye contact, and parent–child turn-taking were examined using visual analysis and Tau-U analysis. Results Statistically significant increases, with large to very large effect sizes, were observed for all 4 participants for parent–child eye contact and parent–child turn-taking. Limited improvements with ceiling effects were observed for parents' book selection skills. Conclusion The findings provide preliminary evidence for the effectiveness of an ESR intervention for babies with HL for promoting parent–child interactions through eye contact and turn-taking.

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