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renal resistive index obstruction

Ki-Bum Won, Yun Seok Kim, Byoung Kwon Lee, Ran Heo, Donghee Han, Ji Hyun Lee, Sang-Eun Lee, Ji Min Sung, Iksung Cho, Hyung-Bok Park, In-Jeong Cho, Hyuk-Jae Chang
The triglyceride glucose (TyG) index is a useful surrogate marker for insulin resistance, which is an important risk factor for coronary artery disease (CAD). However, data on the relationship of the TyG index and coronary plaque characteristics are limited.This study included 2840 participants with near-normal renal function who underwent coronary computed tomography angiography. CAD was defined as the presence of any plaques, and obstructive CAD was defined as the presence of plaques with ≥50% stenosis...
May 2018: Medicine (Baltimore)
Xiao-Dong Li, Yu-Peng Wu, Yong Wei, Shao-Hao Chen, Qing-Shui Zheng, Hai Cai, Xue-Yi Xue, Ning Xu
BACKGROUND: This study aimed to identify factors predicting the recoverability of renal function after pyeloplasty in adult patients with ureteropelvic junction obstruction. METHODS: We retrospectively reviewed 138 adults with unilateral renal obstruction-induced hydronephrosis and who underwent Anderson-Hynes dismembered pyeloplasty from January 2013 to January 2016. Hydronephrosis was classified preoperatively according to the Society for Fetal Urology (SFU) grading system...
2018: Urologia Internationalis
Sylvia Reineke, Thierry P Carrel, Verena Eigenmann, Brigitta Gahl, Urs Fuehrer, Christian Seidl, David Reineke, Eva Roost, Magi Bächli, Jonas Marschall, Lars Englberger
OBJECTIVES: Perioperative prophylaxis with cephalosporins reduces sternal wound infections (SWIs) after cardiac surgery. However, more than 50% of coagulase-negative staphylococci, an important pathogen, are cephalosporin resistant. The aim of this study was to determine the impact of adjunctive vancomycin on SWIs in high-risk patients. METHODS: We conducted a pre- and postintervention study in an academic hospital. Preintervention (2010-2011), all patients received prophylaxis with 1...
October 16, 2017: European Journal of Cardio-thoracic Surgery
Leonardo Tortolero Blanco, Moises Rodriguez Socarras, Rubén Fabuena Montero, Elena López Diez, Antonio Ojea Calvo, Sergio Alonso Y Gregorio, José Ramón Cansino, Juan Antonio Galan, Juan Gómez Rivas
INTRODUCTION: Renal colic during pregnancy is a rare urgency but is one of the most common non-obstetric reasons for hospital admission. The management often means a challenge for the urologist and gynecologist due to the complexity involved in preserving the maternal and fetal well-being. MATERIAL AND METHODS: We performed a literature search within the PubMed database. We found 65 related articles in English. We selected 36 for this review prioritizing publications in the last two decades...
2017: Central European Journal of Urology
Florrie Daniels, Simon De Freitas, Andrew Smyth, John Garvey, Conor Judge, John Joseph Gilmartin, Faisal Sharif
BACKGROUND: Catheter-based renal sympathetic denervation (RSD) significantly reduces blood pressure in patients with resistant hypertension, who commonly have obstructive sleep apnoea (OSA). These patients are considered particularly responsive to the antihypertensive effects of RSD, but additional benefits of metabolic control on sleep apnoea severity have not been thoroughly investigated. METHODS: The effect of RSD was evaluated prospectively in a cohort of patients with OSA (apnoea-hypopnea index (AHI) ≥15 events per hour and an Epworth Sleepiness Scale (ESS) score ≤9) and treatment resistant hypertension...
February 2017: Sleep Medicine
Yusuke Kudo, Taisei Mikami, Mutsumi Nishida, Kazunori Okada, Sanae Kaga, Nobuo Masauzi, Satomi Omotehara, Hitoshi Shibuya, Kaoru Kahata, Chikara Shimizu
BACKGROUND AND PURPOSE: Flow velocity oscillation rate (FVOR) of the renal interlobar vein has been reported to be decreased in patients with urinary obstruction or diabetic nephropathy, and increased in those with hypertension during pregnancy. To clarify the clinical role of the renal interlobar venous FVOR, we investigated the flow velocity patterns of the renal vessels in patients with hypertension (HT) and/or diabetes (DM). METHODS AND RESULTS: Pulsed-wave Doppler sonography was performed in 34 patients: 15 with HT, 10 with DM, and nine with both HT and DM (HT-DM)...
October 2017: Journal of Medical Ultrasonics
Faik Kose, Zafer Turkyilmaz, Kaan Sonmez, Ramazan Karabulut, Aylar Poyraz, Ozlem Gulbahar, Arzu Aral, Cagri Damar, Cem Kaya, Abdullah Can Basaklar
BACKGROUND: In this study, it was aimed to determine the effects of alfuzosin on experimentally generated unilateral partial ureteropelvic junction obstruction (UPO) in rats. MATERIALS AND METHODS: Thirty Long-Evans rats were randomly allocated into five groups. In control group (C), nothing was performed; in group Sham (S) only laparotomy was done; in Alfuzosin group (A) only alfuzosin was administered for two weeks (10 mg/kg/day p.o.) without any surgery; in UPO group, unilateral UP junction obstruction was produced; and in the Group UPT (ureteropelvic obstruction + treatment), alfuzosin was administered for two weeks (10 mg/kg/day p...
September 2016: Renal Failure
Mehmet Sait Menzilcioglu, Mahmut Duymus, Serdal Citil, Gulay Gungor, Mustafa Saglam, Ozkan Gungor, Serife Nur Boysan, Akif Sarıca, Serhat Avcu
OBJECTIVES: Chronic kidney disease (CKD) is a disorder progressing to end-stage kidney failure. Early diagnosis and treatment are important for medical care. The aim of this prospective study was to define the strain index (SI) and resistivity index (RI) values in the same CKD group for each kidney separately at the same time, and also to compare the efficacy of SI and RI in the differentiation of normal population and CKD patients. MATERIALS AND METHODS: Toshiba Aplio 500 USG device and 3...
September 2016: La Radiologia Medica
Mario Meola, Sara Samoni, Ilaria Petrucci, Claudio Ronco
The incidence of acute kidney injury related to urinary tract obstruction is low (1-10%). It occurs in bilateral renal or lower urinary tract obstruction or in ureter obstruction in patients with a single functioning kidney or with pre-existing chronic kidney disease. The etiology and the incidence of obstruction vary on the basis of age and gender. Conventional ultrasound has a high sensitivity (>95%), but low specificity (<70%) in the diagnosis of urinary tract obstruction. Nevertheless, color Doppler is used through the evaluation of renal resistive indexes, ureteral jet and twinkling artifact...
2016: Contributions to Nephrology
Mario Meola, Sara Samoni, Ilaria Petrucci
Chronic tubulointerstitial diseases are a common final pathway toward chronic renal failure regardless the primary damage (glomerular, vascular or directly the tubulointerstitium). Chronic tubulointerstitial nephritis (CTN) is characterized by interstitial scarring, fibrosis and tubule atrophy, resulting in progressive chronic kidney disease. Most frequent causes of CTN are drugs, heavy metals, obstructive uropathy, nephrolithiasis, reflux disease, immunologic diseases, neoplasia, ischemia, metabolic diseases, genetics and miscellaneous...
2016: Contributions to Nephrology
M Nadzri, E Y Hing, A H Hamzaini, M Z Faizah, A AbAziz, Y Kanaheswari, M A Zulfiqar
BACKGROUND: to determine the usefulness of Doppler ultrasound measurement of resistive index (RI) in differentiating obstructive from non-obstructive hydronephrosis in children. METHODS: From August 2011 to November 2012, renal Doppler assessments of the intra-renal renal arteries were performed on 16 children (19 kidneys) with congenital hydronephrosis. the independent t-test was used to assess for significant difference in RI values between those with obstructive hydronephrosis (6 kidneys) and those with non-obstructive hydronephrosis (13 kidneys) as determined by dynamic renal scintigraphy...
December 2015: Medical Journal of Malaysia
Makoto Mori, Camden Hebson, Kayoko Shioda, Robert W Elder, Brian E Kogon, Fred H Rodriguez, Maan Jokhadar, Wendy M Book
BACKGROUND: In heart failure, a high systemic vascular resistance index (SVRI), high central venous pressure (CVP), and low cardiac index (CI) predict poor outcomes. Conversely, late hemodynamic manifestations of failing Fontan circulation and associations with end-organ dysfunction are not well understood. METHODS: A retrospective review of right-heart catheterization data of adult Fontan patients between 2002 and 2014 was conducted. Relationships between hemodynamic variables and serious adverse events (death or heart transplant) were examined using the Cox proportional hazard analysis...
December 2016: Congenital Heart Disease
Bojan Gavrilovic, Milos R Popovic, Azadeh Yadollahi
Obstructive sleep apnea (OSA) is a common disorder in adults characterized by repetitive collapse of the pharynx. OSA prevalence increases in fluid retaining patients such as those with heart or renal failure, and worsens with overnight fluid accumulation in the neck. The objective of this study was to develop a new method of measuring changes in intracellular water (ICW) in the neck, and investigate metrics that represent total neck impedance and their relationship to sleep apnea severity. In 18 non-obese men, neck fluid volume (NFV) was measured before and after sleep using bioelectrical impedance at 50 kHz...
2015: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Bala Murali Krishna Vadana, Ashirwad Pasumarthy, Neelima Penumalli, Narayan Chander Bellapa
INTRODUCTION: Obstructive uropathy is very common cause of pain abdomen. Recognition of the cause of the pain and level of obstruction is the goal. Ultrasound is the primary modality used for detection and characterization of obstructive uropathy along with conventional radiographs. Obstructive uropathy in early stages can be difficult to diagnose using standard B-mode USG or arterial sensitive index. AIM: The purpose of this study is to evaluate the diagnostic accuracy of renal venous doppler ultrasound in diagnosing acute obstructive uropathy either alone or in addition to arterial doppler study of inter lobar arteries...
November 2015: Journal of Clinical and Diagnostic Research: JCDR
I N Apoku, O O Ayoola, A A Salako, B M Idowu
PURPOSE: To determine the renal arterial hemodynamic changes induced by obstructive uropathy using Doppler ultrasonography. MATERIALS AND METHODS: 60 adult subjects with suspected obstructive uropathy and 60 asymptomatic apparently healthy controls with normal renal ultrasound features were evaluated. B-mode sonography of the kidneys and spectral Doppler examination of the renal interlobar arteries of all the participants were performed. The mean resistive indices (mRI) of both interlobar arteries were obtained and compared to that of the controls...
May 2015: International Braz J Urol: Official Journal of the Brazilian Society of Urology
F Mahfoud, D Linz, G Mancia, K Narkiewicz, L M Ruilope, M P Schlaich, R E Schmieder, B Williams, M Böhm
OBJECTIVE: Obstructive sleep apnea (OSA) is associated with sympathetic nervous system activation and the development of hypertension. The Global SYMPLICITY Registry is prospectively enrolling real world patients with uncontrolled hypertension including patients with OSA. This analysis compares baseline characteristics and blood pressure (BP) lowering effects of renal denervation in patients with and without OSA. DESIGN AND METHOD: The Global SYMPL CITY Registry is a prospective, multicentre international registry designed to evaluate the safety and effectiveness of renal denervation in a broad population of patients with uncontrolled hypertension...
June 2015: Journal of Hypertension
Fatma Nur Soylu Boy, Arda Kayhan, Hakki Muammer Karakas, Turgut Alp, Ayhan Verit
OBJECTIVE: To compare the efficacy of diffusion-weighted (DW) magnetic resonance (MR) imaging and Doppler ultrasonography (US) by using quantitative markers in acute unilateral obstruction due to renal stones. METHODS: This prospective study included 28 patients with unilateral ureteral obstruction and 18 healthy control subjects. In Doppler US and DW MR imaging, resistive index (RI) and apparent diffusion coefficient (ADC) values were measured respectively. The results were compared in patients and in control subjects...
2015: International Journal of Clinical and Experimental Medicine
Sung Kyoung Moon, Sang Yoon Kim, Jeong Yeon Cho, Seung Hyup Kim
OBJECTIVES: The purpose of this study was to evaluate the feasibility of ultrasonic shear wave elastography for quantification of renal fibrosis in an experimental rabbit model. METHODS: Thirty-eight kidneys of 19 rabbits were studied and categorized into 3 groups: group I, ureter obstruction (n = 9); group II, renal vein occlusion (n = 10); and group III, normal control (n = 19). Before surgery, we measured stiffness at the renal cortex using shear wave elastography and evaluated the sonographic findings, including size, echogenicity, and resistive index...
May 2015: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
L Sardo, P Palange, F Di Mario, B Barbano, A Gigante, M Mordenti, A Steffanina, M Bonini, A Amoroso, F Vaccaro, R Cianci
BACKGROUND: Oxygen desaturation and reoxygenation, related to intermittent hypoxia cycles due to upper airway obstruction, are major pathophysiologic features of obstructive sleep apnea syndrome (OSAS) and are thought to be responsible for an increased risk of cardiovascular diseases. Continuous positive airway pressure (CPAP) is therefore considered the gold standard in the management of OSAS. Further data demonstrated a high prevalence of OSAS in patients with altered renal function despite the underlying pathophysiological mechanisms that have not been clarified...
December 2015: Sleep & Breathing, Schlaf & Atmung
Umamageswari Amirthalingam
CONTEXT: Urolithiasis remains a major health problem despite advances in therapy. Obstruction results in an increase in pressure within the urinary tract, causing structural and physiologic changes. This study aimed to calculate the intra renal Resistivity Index (RI) of acutely obstructed kidney, to determine the significance of Resistivity Index Ratio (RIR) and difference in Resistivity Index of obstructed and contralateral non obstructed kidney. MATERIALS AND METHODS: Prospective study with renal Doppler for patients presenting with acute unilateral ureteric obstruction...
December 2014: Journal of Clinical and Diagnostic Research: JCDR
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