scholarly journals Changes in Renal Resistive Index Values in Healthy Puppies during the First Months of Life

Animals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1338 ◽  
Author(s):  
Amalia Agut ◽  
Marta Soler ◽  
M. Josefa Fernández-del Palacio
Keyword(s):  
Healthy Adult ◽  
Left Kidney ◽  
Resistive Index ◽  
Renal Resistive Index ◽  
Age Dependent ◽  
Normal Mean ◽  
The Right

The purpose of this study is to establish renal resistive index (RRI) of normal kidneys in puppies aged from newborn to 20 weeks of age and to determine the age at which RRI reaches adult dog values. Six healthy adult intact beagles and six puppies from 1 day after birth to 20 weeks of age were used. In the adult dogs, the ultrasonographic scans were performed once, and in the puppies, the ultrasonographic studies were performed on the first day after birth and at 1, 2, 3, 4, 6, 8, 12, 16, and 20 weeks of age. RRI was obtained at the interlobular and arcuate arteries in each kidney. There were no statistical differences between the RRI values obtained between the right and left kidney nor between intrarenal arteries (interlobar and arcuate). The RRI was the highest during the first weeks of life, after which it declined gradually with increasing age reaching adult dog values at 12 weeks of age. In conclusion, the normal mean RRI is age dependent in dogs. Twelve weeks can be regarded as the age at which adult mean RRI criteria can be applied to puppies.

scholarly journals KORELASI UKURAN KETEBALAN KORTEKS DAN RESISTIVE INDEX GINJAL BERDASARKAN PEMERIKSAAN ULTRASONOGRAFI PADA PASIEN HIDRONEFROSIS

2019 ◽  
Vol 12 (2) ◽  
pp. 183
Author(s):  
Ferawati Dakio ◽  
Nurlaily Idris ◽  
Mirna Muis ◽  
Andi Alfian ◽  
Hasyim Kasim ◽  
...  
Keyword(s):  
Doppler Ultrasonography ◽  
Resistive Index ◽  
Radiology Department ◽  
Renal Resistive Index ◽  
Cross Sectional ◽  
Correlation Tests ◽  
The Mean ◽  
Cross Sectional Design ◽  
The Right ◽  
Superior Pole

Hidronefrosis dapat terjadi pada satu atau kedua ginjal yang menyebabkan aliran urine menjadi lemah dan mengganggu fungsi dari ginjal itu sendiri.Penelitian ini bertujuan mengetahui korelasi ketebalan korteks ginjal dan resistive index ginjal berdasarkan pemeriksaan ultrasonografi pada pasien hidronefrosis. Penelitian ini dilakukan di bagian Radiologi Rumah Sakit Umum Pusat Dr. Wahidin Sudirohusodo Makassar dari Mei sampai dengan Agustus 2018. Desain penelitian yang digunakan adalah observasional dengan rancangan potong lintang.Sampel penelitian sebanyak empat puluh orang yang memiliki klinis hidronefrosis. Pemeriksaan ultrasonografi grayscale terhadap pasien dilakukan untuk mengukur ketebalan korteks ginjal yang dilakukan di bagian tengah ginjal pada potongan longitudinal dan diukur dari puncak piramid tegak lurus ke arah kapsul, kemudian dilanjutkan pemeriksaan ultrasonografi doppler di arteri interlobar atau arcuata pada pole superior, median, dan inferior ginjal untuk menilai  renal resistiveindex. Data dianalisis dengan analisis statistik melalui uji korelasi Spearman dan Pearson.Hasil penelitian menunjukkan bahwa rerata sampel penelitian mengalami hidronefrosis derajat ringan. Mean tebal korteks ginjal kanan pada penelitian ini 0,9 cm (0,26-1,79cm) dan ginjal kiri 0,84 cm (0,22-1,57cm). Terdapat korelasi yang bermakna antara derajat hidronefrosis dengan ketebalan korteks ginjal kanan dan kiri dengan arah korelasi negatif (p=0,0001). Kecenderungan peningkatan derajat hidronefrosis, meningkatkan nilai resistive index meskipun secara statistik tidak bermakna. Tidak terdapat korelasi antara ketebalan korteks dan resistive index  ginjal berdasarkan pemeriksaan ultrasonografi.   Hydronephrosis can occur in one or both kidneys which causes the flow of urine to become weak and interfere with the function of the kidney. This research aimed to investigate the correlation between the cortex thickness and the resistive index of kidney based on the ultrasonography examination in hydronephrosis patients.  The research was conducted in Radiology Department of Dr. Wahidin Sudirohusodo General Hospital, Makassar from May through August 2018. The research design used was observational using the cross sectional design. The total samples comprised 40 samples with clinical hydronephrosis. The examination of ultrasonography grayscale was carried out in order to measure the cortex thickness of the kidneys in the central parts of kidneys and the longitudinal cut was measured from the pyramid top straight down the capsule, then it was continued with the Doppler ultrasonography examination in the interlobare artery or arcute at superior pole, median and inferior kidney in order to evaluate the renal resistive index. The data were analyzed using the statistical analysis through the correlation tests of Spearman and Pearson. The research results indicated that the mean research samples had experienced the light hydronephrosis. The mean cortex thickness of the right kidney was 0.9 cm (0.26 - 1.79 cm), and that of the left kidnet was 0.84 cm (0.22 - 1.57 cm). There was a significant correlation between the degree of hydronephrosis and the cortex thickness of the right and the left kidneys, with the direction of the negative correlation (p=0.0001). There was a tendency of the increase of hydronephrosis degree to increase the value of resistive index, though statistically it was insignificant. There was no correlation between the cortex thickness and the resistive index of kidney based on the ultrasonogrphy examination.  

Duplex Doppler estimation of resistive index in arcuate arteries of sedated, normal female dogs: implications for use in the diagnosis of renal failure

1997 ◽  
Vol 33 (1) ◽  
pp. 69-76 ◽  
Author(s):  
BJ Rivers ◽  
PA Walter ◽  
JG Letourneau ◽  
DE Finlay ◽  
ER Ritenour ◽  
...  
Keyword(s):  
Renal Failure ◽  
Blood Flow ◽  
Left Kidney ◽  
Resistive Index ◽  
Normal Female ◽  
Clinically Normal ◽  
Ketamine Hydrochloride ◽  
Duplex Doppler ◽  
Arcuate Artery ◽  
The Right

The resistive index (RI), an ultrasonographic method of evaluating intrarenal resistance to blood flow, may be used to aid in diagnosis of renal failure. Values for arcuate artery RI, expressed as mean +/- two standard deviations, were obtained in clinically normal female dogs sedated with atropine, acepromazine maleate, diazepam, and ketamine hydrochloride. No statistically significant differences were noted between the values for the right kidney (0.33 to 0.57) versus the left kidney (0.32 to 0.56); however, the values were statistically significantly lower than values reported for nonsedated, normal dogs.

P5462Arterial hypertension, right heart remodelling and intrarenal haemodynamics: the mysterious triangle in the cardiovascular continuum

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
I Cabac-Pogorevici ◽  
V Revenco
Keyword(s):  
Arterial Hypertension ◽  
Structural Changes ◽  
Arterial Compliance ◽  
Resistive Index ◽  
Renal Resistive Index ◽  
Right Heart ◽  
Basal Diameter ◽  
Prediction Of Mortality ◽  
The Mean ◽  
The Right

Abstract Purpose In arterial hypertension (HTN), vascular structural changes develop as a consequence of haemodynamic as well as neurohumoral factors. Indeed, in the peripheral vessels a decrease in arterial compliance and, in the heart remodelling occurs respectively. The significant impact of HTN on left heart remodelling and its interconnection with intrarenal hemodynamics (IRH) has been widely studied. In the same time, there is lack of data concerning the affinity of HTN, IRH and right heart remodelling, as another important cluster of factors for prediction of mortality and morbidity in this group of patients. Methods The study included 104 patients (50 females and 54 males, mean age 48,26±11,2 years) with grade I-III arterial hypertension. All subjects underwent careful clinical history and physical examination to reveal risk factors, cardiovascular history and treatments. Blood test, echocardiography focused on right heart evaluation, intrarenal Doppler measurements were repeated in three parts of both kidneys (superior, median, and lower) untill three reproducible waveforms were obtained. The following IRH parameters were obtained: renal resistive index (RRI), renal pulsatile index (RPI), acceleration time (AT), renal volume (RV) and RV/RRI ratio. Results The mean RRI was 0,6672±0,0452, mean RPI 1,2533±0,178, mean AT 66,68±2,324 ms, mean RV 129,67±23,79 ml and mean RV/IRR ratio 195,52±41,587 ml. Mean 24 hours SBP was 146,12±13,96 mmHg, mean 24 hours DBP 86,59±6,78 mmHg. The mean pulse pressure (PP) was 59,10±22,90 mmHg. The mean 24 hours heart rate (HR) was 75,14±26,86 beats/minute. Mean value for the right ventricular (RV) basal diameter (4Ch) was 29,5±3,71 mm, right atrium (RA) diameter 39,71±3,38 mm, RA area 16,98±2,89 mm2, Sm RV 0,11±0,05 mm/sec, TAPSE 19,2±1,66 mm, SPAP 28,3±5,321 mmHg. We found an important positive correlation between RA diameter and RA area with RRI (r=0,364, p<0,01), (r=0,371, p<0,01), RPI (r=0,296, p<0,01), (r=0,320, p<0,01) and AT (r=0,155, p<0,05), (r=0,148, p<0,05), and negative correlation of RV Sm with RRI (r=−0,259, p<0,01), RPI (r=−0,232, p<0,01), AT (r=−0,162, p<0,05), meanwhile PASP showed an important positive connection with RRI (r=0,354, p<0,01), RPI (r=0,330, p<0,01) and AT (r=0,218, p<0,01). Conclusions The assumption that cardiac structural changes are progressing in parallel with extracardiac target damage could have an important scientific substrate, emphasizing the potential connection of IRH and the heart remodelling, including the right heart in HTN, and the eventual strengthening the IRH positions as a predictor of cardiovascular outcomes in this subset of population.

scholarly journals Relation between Renal Resistive Index and Serum Albumin in Nephrotic Syndrome

2021 ◽  
Vol 10 (30) ◽  
pp. 2228-2232
Author(s):  
Pranoy Dey ◽  
Niku Hage
Keyword(s):  
Nephrotic Syndrome ◽  
Serum Albumin ◽  
Serum Albumin Level ◽  
Left Kidney ◽  
Peak Systolic Velocity ◽  
Resistive Index ◽  
Albumin Level ◽  
Renal Resistive Index ◽  
The Mean ◽  
Renal Doppler

BACKGROUND Renal resistive index (RRI) is a non-invasive marker of renal function, which can be measured by renal USG Doppler. High RI indicates poor prognosis, which has been associated with conditions such as proteinuria, hypertension, chronic kidney disease and renal failure. As nephrotic syndrome is characterised by significant proteinuria and hypoalbuminemia, which may progress to renal failure, it is important to see the correlation of RRI with serum albumin level. The purpose of this study was to assess the relation between renal resistive index and serum albumin in nephrotic syndrome. METHODS USG renal Doppler was done for all the children with nephrotic syndrome and RRI was calculated as [(peak - systolic velocity − end - diastolic velocity) / peak - systolic velocity]. Blood investigations were also done, from which serum albumin values were obtained. RRI was compared with mean serum albumin level. Statistical analysis of data was performed using the computer programme, Statistical Package for Social Sciences (SPSS for windows, version 21.01, Chicago, SPSS Inc.) and Microsoft excel 2010. Results on continuous measurement were presented as mean ± standard deviation and compared using Analysis of Variance (ANOVA). RESULTS The mean serum albumin in the children with nephrotic syndrome in our study was 1.82 ± 0.32 gm / dl. The mean RI value was 0.66 ± 0.14 SD, 0.64 ± 0.15 SD and 0.66 ± 0.12 SD as well as 0.63 ± 0.12 SD, 0.67 ± 0.16 SD and 0.71 ± 0.13 SD on the right and left kidney respectively for each of upper, middle, and lower pole. P value of left kidney and right kidney was 0.0057 and 0.6409 respectively. CONCLUSIONS Lower the mean serum albumin level, higher the range of RRI. KEY WORDS Serum Albumin, Renal Resistive Index, Nephrotic Syndrome, USG Renal Doppler

scholarly journals Low systolic blood pressure values, renal resistive index measurement and glomerular filtration rate in a non-dialysis dependent chronic kidney disease population

2019 ◽  
Vol 90 (4) ◽  
pp. 288-292
Author(s):  
Simone Brardi ◽  
Gabriele Cevenini
Keyword(s):  
Blood Pressure ◽  
Chronic Kidney Disease ◽  
Glomerular Filtration Rate ◽  
Kidney Disease ◽  
Serum Creatinine ◽  
Systolic Blood Pressure ◽  
Filtration Rate ◽  
Left Kidney ◽  
Resistive Index ◽  
Renal Resistive Index

Objective: A longitudinal prospective case control study was organized to explore the relationships between glomerular filtration rate (GFR), renal resistive index (RRI) and blood pressure values in a non-dialysis dependent adult population affected by chronic kidney disease and exposed to low systolic blood pressure (SBP) values.Material and methods: The study sample (54 patients: 31 males and 23 females with an average age of 61.7 ± 19.2 years) was randomly selected from a population of adult non-dialysis dependent patients that scored a SBP < 100 mmHg at the medical examination. The patients were equally divided in two groups defined by the presence and absence of chronic kidney disease, (i.e. a GFR less or greater than 60 ml/min/1.73 m2, respectively). Patients were submitted to a full therapeutic and dietetic intervention to correct the hypotension until reaching a steady SBP > 100 mmHg. Results: In the group with chronic renal disease, the comparison between the data recorded with SBP < 100 mmHg (t0) and those detected with SBP ≥ 100 mmHg (t1) showed a statistically significant decrease of serum creatinine as well as an increase of GFR (mean serum creatinine t0 – serum creatinine t1: 0.194 ± 0.35, p < 0.01; mean GFR t0 – GFR t1: -4.615 ± 8.8, p < 0.013). There was also a statistically significant reduction of the RRI (mean right kidney RRI t0 – mean right kidney RRI t1: + 0.082 ± 0.03, p < 0; mean left kidney RRI t0 – mean left kidney RRI t1: 0.076 ± 0.03, p < 0). Conclusion: We concluded that, in CKD, when aorta is stiffed, a decrease of SBP can limit the renal perfusion that, in this condition, is mostly dependent by stroke volume, causing an increase of RRI and a decrease of GFR that we suppose as reversible with the restoration of SBP.

scholarly journals Transabdominal Renal Doppler Ultrasound in Healthy Adult Holstein-Friesian Cows: A Pilot Study

Animals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 63
Author(s):  
J. Daniel Barreiro-Vázquez ◽  
Marta Miranda ◽  
Andrés Barreiro-Lois
Keyword(s):  
Reference Values ◽  
Left Kidney ◽  
Resistive Index ◽  
Renal Diseases ◽  
Invasive Technique ◽  
Holstein Friesian ◽  
Doppler Evaluation ◽  
The Right ◽  
Renal Doppler ◽  
Friesian Cows

There is a notable lack of reference values for the renal resistive indices in the bovine kidney. Ultrasound (US) Doppler evaluation of these indices is a powerful, non-invasive technique for assessing, monitoring and diagnosing renal diseases in humans and other animals (e.g., small animals and horses). The aims of the present study were to establish a protocol for renal Doppler US in adult healthy Holstein-Friesian cows and to provide reference values for the renal resistive index (RI) and pulsatility index (PI). In cattle, the right kidney is always visible through a right abdominal window. Nevertheless, the left kidney is rarely accessible by transabdominal ultrasound. Doppler evaluation of the kidneys via a transabdominal approach is possible when accessible, but measurements can only be made in the larger vessels at the renal hilum. Normal RI and PI values were respectively 0.49 ± 0.07 and 0.70 ± 0.15 for the right kidney and 0.53 ± 0.05 and 0.79 ± 0.11 for the left kidney. We suggest an upper cut-off value for the RI of 0.63 and for the PI of 1.00 in healthy Holstein-Friesian cows. This is the first report describing normal values for the renal RI and PI in cattle that may be useful in future studies for characterizing different bovine pathologies that affect the renal parenchyma.

STUDY OF RADIATION CHARACTERISTICS THE RENAL FUNCTION IN PATIENTS WITH TYPE 2 DIABETES

2014 ◽  
pp. 73-77
Author(s):  
Van Chuong Nguyen ◽  
Thi Kim Anh Nguyen
Keyword(s):  
Type 2 Diabetes ◽  
Renal Function ◽  
Glomerular Filtration Rate ◽  
Glomerular Filtration ◽  
Filtration Rate ◽  
Disease Duration ◽  
Left Kidney ◽  
Cross Sectional ◽  
The Right

Background: A Research glomerular filtration rate (GFR) of 61 patients with type 2 diabetes mellitus with renal scanning 99mTc-DTPA glomerular filtration rate at the hospital 175. Objective: (1) To study characteristics of imaging of renal function. (2) Understanding the relationship between GFR with blood sugar, HbA1c, blood pressure and albuminuria in patients with type 2 diabetes. Methods: Descriptive, prospective, cross-sectional study. Clinical examination, Clinical tests and 99mTc-DTPA GFR gamma - camera renography for patients. Result: GFR of the study group was 75,4 ± 22,3 ml/phut/1,73m2, the left kidney was 35,0 ± 13,0 is lower than the right kidney and 39,8 ± 11,9; p <0,01. There is no correlation between GFR with blood glucose and HbA1c, the risk of reduced GFR in hypertensive group associated is OR = 6,5 with p<0,01; albuminuria (+) is OR = 4,2 with p <0,01; and disease duration > 10 years is OR = 3,5 with p <0.01. Conclusion: GFR of the left kidneys is lower than the right kidney; correlation decreased GFR associated with hypertension, albuminuria and disease duration. Keywords: GFR, diabetes, albuminuria

scholarly journals 1003 A Case of Tunnel-Vision in Upper Renal Tract Imaging: The Invisible Gorilla

2021 ◽  
Vol 108 (Supplement_2) ◽  
Author(s):  
M Swamad ◽  
M K Quraishi ◽  
S Ahmed
Keyword(s):  
Renal Mass ◽  
Left Kidney ◽  
Interesting Case ◽  
Ct Scans ◽  
Renal Ultrasound ◽  
Ultrasound Scan ◽  
Surgical Team ◽  
Tunnel Vision ◽  
Impact Patient Care ◽  
The Right

Abstract We present an interesting case of a 70-year-old female who presented with haematuria on the suspected cancer pathway. Renal ultrasound showed a vascular renal mass on her right kidney measuring 8x7cm with an unremarkable left kidney. She underwent a laparoscopic radical nephrectomy following confirmation of an 8cm renal mass in the right kidney on the contrasted staging CT scan with a repeat review at the multidisciplinary meeting. Post-operatively a subsequent review of the pre-operative CT and ultrasound scan, showed an incidental large left(contralateral) upper quadrant retroperitoneal fatty mass sized 15x10cm, displacing the stomach and spleen. Further investigation in the form of an MRI Abdomen excluded features of a liposarcoma, resulting in the diagnosis of a large retroperitoneal lipoma. This case highlights the significance of selective attention in imaging interpretation. We believe this to be a prime example of the level of meticulousness required as fat-rich tissues have low attenuation on CT-scans, which can be easily missed out. A cautious multi-clinician interpretation of scans should be performed to avoid missing potentially sinister pathology which would impact patient care dramatically. This case has led to more thorough review of future pre-operative imaging by the operating surgical team.

Ex Vivo Repair of a Renal Artery Saccular Aneurysm in a Living-Nonrelated Donor and Subsequent Successful Kidney Transplantation

2018 ◽  
Vol 52 (6) ◽  
pp. 455-458
Author(s):  
Rogerio A. Muñoz-Vigna ◽  
Javier E. Anaya-Ayala ◽  
Juan N. Ramirez-Robles ◽  
Daniel Nuño-Diaz ◽  
Sandra Olivares-Cruz
Keyword(s):  
Kidney Transplantation ◽  
Renal Artery ◽  
Ex Vivo ◽  
Incidental Finding ◽  
Left Kidney ◽  
Renal Arteries ◽  
Saccular Aneurysm ◽  
Preoperative Imaging ◽  
The Right ◽  
Stage Renal Disease

The use of kidney grafts with aneurysmal disease involving the renal arteries for transplantation is very uncommon and relatively controversial. We herein present the case of a 52-year-old woman who volunteered to become a living-nonrelated donor; during the preoperative imaging workup, a computed tomography angiography revealed a 1.5-cm saccular aneurysm in the left kidney, while the contralateral renal artery was normal. We decided to utilize the left kidney for a 25-year-old male patient with end-stage renal disease, and following the ex vivo repair using the recipient epigastric vessels and saphenous veins, we completed the transplantation in the right pelvic fossa. The postoperative period was uneventful, and at 8 months from the surgery, the graft remains functional. The surgical repair of renal artery aneurysms followed by immediate kidney transplantation is a safe technique and an effective replacement therapy for recipients. The incidental finding of isolated aneurysmal disease in renal arteries should not exclude graft potential availability for transplantation following repair.

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