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Renal Pelvic Pressure

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https://www.readbyqxmd.com/read/27932281/nutcracker-syndrome-a-rare-cause-of-left-flank-pain-that-can-also-manifest-as-unexplained-pelvic-pain
#1
Jean-Marie Berthelot, Frédéric Douane, Yves Maugars, Eric Frampas
Nutcracker syndrome (NCS) is symptomatic unilateral renal venous hypertension due to compression of the left renal vein between the superior mesenteric artery and aorta (anterior NCS) or between the aorta and spine (posterior NCS). The left ovarian or spermatic vein empties into the left renal vein and is an additional site of venostasis in about half the cases of NCS. The presenting symptom of NCS in about half the cases is atypical left flank pain suggesting a disorder of the lower ribs or thoracolumbar spinal junction, particularly as the pain worsens with standing and increased lumbar lordosis...
December 5, 2016: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/27845144/re-hmgb1-tlr4-signaling-induces-an-inflammatory-response-following-high-pressure-renal-pelvic-perfusion-in-a-porcine-model
#2
Dean G Assimos
No abstract text is available yet for this article.
December 2016: Journal of Urology
https://www.readbyqxmd.com/read/27717709/cns-sites-activated-by-renal-pelvic-epithelial-sodium-channels-enacs-in-response-to-hypertonic-saline-in-awake-rats
#3
Vanessa S Goodwill, Christopher Terrill, Ian Hopewood, Arthur D Loewy, Mark M Knuepfer
In some patients, renal nerve denervation has been reported to be an effective treatment for essential hypertension. Considerable evidence suggests that afferent renal nerves (ARN) and sodium balance play important roles in the development and maintenance of high blood pressure. ARN are sensitive to sodium concentrations in the renal pelvis. To better understand the role of ARN, we infused isotonic or hypertonic NaCl (308 or 500mOsm) into the left renal pelvis of conscious rats for two 2hours while recording arterial pressure and heart rate...
September 22, 2016: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/27683029/transplantation-of-mature-adipocyte-derived-dedifferentiated-fat-cells-for-the-treatment-of-vesicoureteral-reflux-in-a-rat-model
#4
Yuichiro Ikado, Daisuke Obinata, Taro Matsumoto, Yasutaka Murata, Koichiro Kano, Noboru Fukuda, Kenya Yamaguchi, Satoru Takahashi
PURPOSE: Autologous cells potentially provide an ideal injectable substance for management in vesicoureteral reflux (VUR). The aim of this study is to examine the effects of mature adipocyte-derived dedifferentiated fat (DFAT) cell transplantation on VUR in a rat bladder pressurization-induced VUR model. METHODS: To create VUR, Sprague-Dawley rats underwent urethral clamping and placement of cystostomy followed by intravesical pressurization. Rat DFAT cells (1 × 10(6) cells, DFAT group, n = 5) or saline (control group, n = 5) was then injected into the bilateral vesicoureteral junctions...
September 28, 2016: International Urology and Nephrology
https://www.readbyqxmd.com/read/27597113/re-animal-experimental-study-to-test-application-of-intelligent-pressure-control-device-in-monitoring-and-control-of-renal-pelvic-pressure-during-flexible-ureteroscopy
#5
https://www.readbyqxmd.com/read/27558001/a-novel-flexible-ureteroscopy-with-intelligent-control-of-renal-pelvic-pressure-an-initial-experience-of-93-cases
#6
Xiaolin Deng, Leming Song, Donghua Xie, Difu Fan, Lunfeng Zhu, Lei Yao, Xiaolin Wang, Shaohua Liu, Yonghua Zhang, Xiaohui Liao, Shengfeng Liu, Zuofeng Peng, Min Hu, Xianxin Zhu, Jianrong Huang, Tairong Liu, Chuance Du, Shulin Guo, Zhongsheng Yang, Guanghua Peng, Zhangqun Ye
BACKGROUND: Flexible ureteroscopic lithotripsy (URS) is rapidly becoming a first-line therapy for patients with renal and ureteral calculi. Most current medical infusion devices can only monitor infusion flow and pressure, but not renal pelvic pressure (RPP). PATIENTS AND METHODS: We designed a patented intelligent system to facilitate flexible URS that included an irrigation and suctioning platform and a ureteral access sheath (UAS) with a pressure-sensitive tip, enabling regulation of the infusion flow precisely and control of the vacuum suctioning by computerized real-time recording and monitoring of RPP...
October 2016: Journal of Endourology
https://www.readbyqxmd.com/read/27529029/overview-of-point-of-care-abdominal-ultrasound-in-emergency-and-critical-care
#7
REVIEW
Toru Kameda, Nobuyuki Taniguchi
Point-of-care abdominal ultrasound (US), which is performed by clinicians at bedside, is increasingly being used to evaluate clinical manifestations, to facilitate accurate diagnoses, and to assist procedures in emergency and critical care. Methods for the assessment of acute abdominal pain with point-of-care US must be developed according to accumulated evidence in each abdominal region. To detect hemoperitoneum, the methodology of a focused assessment with sonography for a trauma examination may also be an option in non-trauma patients...
2016: Journal of Intensive Care
https://www.readbyqxmd.com/read/27428495/pelvic-congestion-syndrome-and-left-renal-compression-syndrome-clinical-features-and-therapeutic-approaches
#8
REVIEW
Christina Jeanneret, Konstantin Beier, Alexander von Weymarn, Jürg Traber
Knowledge of the anatomy of the pelvic, gonadal and renal veins is important to understand pelvic congestion syndrome (PCS) and left renal vein compression syndrome (LRCS), which is also known as the nutcracker syndrome. LRCS is related to PCS and to the presence of vulvar, vaginal and pudendal varicose veins. The diagnosis of the two syndromes is difficult, and usually achieved with CT- or phlebography. The gold standard is the intravenous pressure measurement using conventional phlebography. The definition of PCS is described as pelvic pain, aggravated in the standing position and lasting for more than 6 months...
2016: VASA. Zeitschrift Für Gefässkrankheiten
https://www.readbyqxmd.com/read/27358057/hmgb1-tlr4-signaling-induces-an-inflammatory-response-following-high-pressure-renal-pelvic-perfusion-in-a-porcine-model
#9
Yi Shao, Minglei Sha, Lei Chen, Deng Li, Jun Lu, Shujie Xia
Percutaneous nephrolithotomy (PCNL) causes a rapid increase in renal pelvic pressure in the kidney, which induces an inflammatory response. High-mobility group box-1 (HMGB1) is known to trigger the recruitment of inflammatory cells and the release of pro-inflammatory cytokines following ischemia reperfusion injury in the kidney, but the contribution of HMGB1 to the inflammatory response following high-pressure renal pelvic perfusion has not been investigated. In this study, high-pressure renal pelvic perfusion was induced in anesthetized pigs to examine the effect of HMGB1 on the inflammatory response...
June 29, 2016: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/27290617/role-of-endothelin-1-for-the-regulation-of-renal-pelvic-function
#10
Antje Steinbach, Katrin Schaper, Anna Koenen, Torsten Schlüter, Uwe Zimmermann, Rainer Rettig, Olaf Grisk
Endothelin-1 (ET-1) stimulates contractions in isolated rat renal pelves. The signal transduction mechanisms that mediate ET-1-induced renal pelvic contractions and the role of ET-1 for the in vivo regulation of renal pelvic function are not well characterized. We tested if ET-1 stimulates contractions in murine and human renal pelves, if ET-1 activates the renal pelvic RhoA/ROCK pathway, and if low renal ET-1 formation or ET receptor blockade reduce renal pelvic contractile activity. ET-1 increased contraction frequency and force in murine renal pelves...
August 2016: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/27115398/verapamil-inhibits-the-pelvic-pressure-increase-corresponding-to-flow-perfusion-in-the-porcine-percutaneous-renal-puncture-model
#11
Yi Shao, Haibin Wei, Minglei Sha, Feng Sun, Jun Lu, Shujie Xia
PURPOSE: To estimate the effects of verapamil on pelvic pressure and investigate the possible systemic side effects in the porcine model during the procedure of increasing perfusion rates. MATERIALS AND METHODS: In the experimental group, the pelvic pressure was recorded with increasing perfusion rates of the renal pelvis (0, 2, 4, 6, 8, 10, 14 and 20 ml/min) in response to intraluminal administration of increasing concentrations of verapamil (0, 0.1, 1, 10 and 100 µg/ml) in isotonic saline...
2016: Urologia Internationalis
https://www.readbyqxmd.com/read/27041228/a-novel-drainage-technique-during-micropercutaneous-nephrolithotomy-in-pediatric-patients-double-angiocath
#12
Necmettin Penbegul, Mehmet Mazhar Utangac, Mansur Daggulli, Onur Dede, Yasar Bozkurt, Mehmet Nuri Bodakci, Murat Atar
Micropercutaneous nephrolithotomy (microperc) is a recently introduced percutaneous nephrolithotomy (PNL) technique that has the smallest tract size. The absence of an amplatz sheath during the microperc technique is a fundamental difference that distinguishes it from all other types of PNL (standard, mini, ultramini). Increasing of the intrarenal pelvic pressure (IPP) was demonstrated by the authors in adult patients but this problem may be even more serious in pediatric patients. Previously, the authors defined the use of a 14 gauge angiocath needle and sheath (microsheath) during microperc surgery for pediatric patient to reduce the IPP...
June 2016: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/26919967/animal-experimental-study-to-test-application-of-intelligent-pressure-control-device-in-monitoring-and-control-of-renal-pelvic-pressure-during-flexible-ureteroscopy
#13
Xianxin Zhu, Leming Song, Donghua Xie, Zuofeng Peng, Shulin Guo, Xiaolin Deng, Shengfeng Liu, Difu Fan, Jianrong Huang, Tairong Liu, Chuance Du, Lunfeng Zhu, Zhongsheng Yang, Guanghua Peng, Min Hu, Lei Yao, Min Zeng, Jiuqing Zhong, Wen Qing, Zhangqun Ye
OBJECTIVE: To investigate the application of intelligent pressure control devices (medical irrigation and suctioning platform with pressure feedback function, and suctioning ureteral access sheath with pressure-measuring function) in flexible ureteroscopy for monitoring and control of renal pelvic pressure. MATERIALS AND METHODS: Nine pigs with a total of 18 kidneys were randomly divided into 3 groups according to varied renal perfusion flow rates: group A, 50 mL/min; group B, 100 mL/min; and group C, 150 mL/min...
May 2016: Urology
https://www.readbyqxmd.com/read/26879866/cholinergic-activation-of-neurons-in-the-medulla-oblongata-changes-urinary-bladder-activity-by-plasma-vasopressin-release-in-female-rats
#14
Eduardo M Cafarchio, Luiz A da Silva, Luciana C Auresco, Cristiana A Ogihara, Roberto L Almeida, Gisele Giannocco, Maria C B Luz, Fernando L A Fonseca, Monica A Sato
The central control of the micturition is dependent on cortical areas and other ascending and descending pathways in the brain stem. The descendent pathways from the pons to the urinary bladder (UB) can be direct or indirect through medullary neurons (MN). Chemical stimulation with l-glutamate of MN known for their involvement in cardiovascular regulation evokes changes in pelvic nerves activities, which innervate the urinary bladder. Different neurotransmitters have been found in medullary areas; nevertheless, their involvement in UB control is few understood...
April 5, 2016: European Journal of Pharmacology
https://www.readbyqxmd.com/read/26784697/the-new-generation-mini-pcnl-system-monitoring-and-controlling-of-renal-pelvic-pressure-by-suctioning-device-for-efficient-and-safe-pcnl-in-managing-renal-staghorn-calculi
#15
Zhongsheng Yang, Leming Song, Donghua Xie, Xiaolin Deng, Lunfeng Zhu, Difu Fan, Zuofeng Peng, Shulin Guo, Zhangqun Ye
INTRODUCTION: In order to better control renal pelvic pressure (RPP), reduce surgical complications and increase operative efficacy of minimally invasive percutaneous nephrolithotomy (MPCNL), we designed an MPCNL with intelligent monitoring and control of RPP and sought to explore its clinical efficacy and characteristics. SUBJECT AND METHODS: This study included 60 patients with renal staghorn calculi. A 5F ureteral catheter was connected to an invasive blood pressure monitor for monitoring and control of RPP...
2016: Urologia Internationalis
https://www.readbyqxmd.com/read/26650710/effects-of-alpha-blockade-on-ureteral-peristalsis-and-intrapelvic-pressure-in-an-in-vivo-stented-porcine-model
#16
Lewis Jeremy Johnson, Daniel Davenport, Ramakrishna Venkatesh
INTRODUCTION: Clinical studies have shown beneficial role of oral alpha-blockers for ureteral stent-related morbidity. However, the in vivo effects of oral alpha-blockers on a stented ureter are unclear. We evaluated the effects of alpha-blockade on ureteral dynamics in a stented porcine ureter. METHODS: Twenty-seven female pigs were used in this study. Fourteen pigs received oral alpha-blocker medication (silodosin, 8 mg daily), and 13 pigs received no medication...
April 2016: Journal of Endourology
https://www.readbyqxmd.com/read/26436542/effects-of-renal-denervation-on-renal-pelvic-contractions-and-connexin-expression-in-rats
#17
A Koenen, A Steinbach, K Schaper, U Zimmermann, B Miehe, B Kurt, R Rettig, O Grisk
AIMS: The renal pelvis shows spontaneous rhythmic contractile activity. We assessed to what extent this activity depends on renal innervation and studied the role of connexins in pelvic contractions. METHODS: Rats underwent unilateral renal denervation or renal transplantation. Renal pelvic pressure and diuresis were measured in vivo. Spontaneous and agonist-induced contractions of isolated renal pelves were investigated by wire myography. Rat and human renal pelvic connexin mRNA abundances and connexin localization were studied by real-time PCR and immunofluorescence respectively...
February 2016: Acta Physiologica
https://www.readbyqxmd.com/read/26304479/ex-vivo-repair-of-renal-artery-aneurysms
#18
Adriana Laser, William R Flinn, Marshall E Benjamin
OBJECTIVE: Renal artery aneurysms (RAAs) are rare but remain challenging lesions when treatment is required. Endovascular techniques may be useful in selected, more proximal lesions with amenable morphology, but open surgical repair is often required for more distal, anatomically complex hilar RAAs that often have several branches and unfavorable anatomy. This study reviewed a single-center experience with ex vivo repair of 14 of these more complex, distal RAAs. METHODS: The records of 14 consecutive patients having ex vivo RAA repair between 1997 and 2013 were retrospectively reviewed...
September 2015: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/26257977/a-major-complication-in-micropercutaneous-nephrolithotomy-upper-calyceal-perforation-with-extrarenal-migration-of-stone-fragments-due-to-increased-intrarenal-pelvic-pressure
#19
Fatih Akbulut, Burak Ucpinar, Metin Savun, Onur Kucuktopcu, Faruk Ozgor, Abdulmuttalip Simsek, Gokhan Gurbuz
Micropercutaneous nephrolithotomy is a safe and efficient technique for appropriate sized stones. It is performed through a 4.85 Fr all-seeing needle and stones are fragmented into dust, without the need for tract dilatation, unlike other percutaneous nephrolithotomy types. Even though micropercutaneous nephrolithotomy has many advantages, increase in intrapelvic pressure during surgery may cause rare but serious complications. Herein we report a case of micropercutaneous nephrolithotomy in a 20-year-old woman with a 20 mm right renal pelvis stone and present an undesired outcome of this complication, upper calyceal perforation...
2015: Case Reports in Urology
https://www.readbyqxmd.com/read/26217550/intraluminal-pressure-profiles-during-flexible-ureterorenoscopy
#20
Helene Jung, Palle J S Osther
BACKGROUND: Irrigation and instrumentation during ureterorenoscopic procedures may cause increased pressure in the renal pelvis (PP) with potential harmful adverse effects. In order to assess the pressure increases during ureterorenoscopy, we measured the intraluminal renal pelvic pressure during retrograde intrarenal stone surgery (RIRS). METHODS: Twelve patients admitted for RIRS were included. Irrigation rate was standardized to 8 ml/min. A ureteral catheter was retrogradely placed in the renal pelvis for PP measurements...
2015: SpringerPlus
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