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https://www.readbyqxmd.com/read/28731900/micro-and-macro-circulatory-changes-during-sepsis-and-septic-shock-in-a-rat-model
#1
Tianfeng Hua, Xiaobo Wu, Wei Wang, Hao Li, Jennifer Bradley, Mary Ann Peberdy, Joseph P Ornato, Wanchun Tang
Microcirculation is the motor of sepsis. In the present study, we investigated whether microcirculatory alterations occur prior to changes of systemic hemodynamics in a rat model of cecum ligation and puncture (CLP)-induced sepsis. We further investigated renal microcirculatory changes during sepsis and compared those with buccal microcirculation. Twelve male Sprague-Dawley rats were randomized into a sham control group (n = 6) and a CLP group (n = 6). Perfused microvessel density (PVD) and microvascular flow index (MFI) were evaluated using sidestream dark field (SDF) video microscopy at baseline, 60, 120, 180, 240, 300, and 360 minutes following CLP...
July 20, 2017: Shock
https://www.readbyqxmd.com/read/28730318/renal-function-in-neonates-with-twin-twin-transfusion-syndrome-treated-with-or-without-fetoscopic-laser-surgery
#2
Lianne Verbeek, Faiez A Joemmanbaks, Jacoba M E Quak, Ram N Sukhai, Johanna M Middeldorp, Dick Oepkes, Enrico Lopriore
The aim of this study is to investigate the short-term renal function in neonates with twin-twin transfusion syndrome (TTTS), treated with fetoscopic laser surgery (laser group) or conservatively (non-laser group). Creatinine and urea levels and urine output were recorded in the first week after birth. Primary outcome was short-term renal dysfunction, defined as a creatinine level of >100 μmol/L during the first week postpartum. We evaluated 312 twins (laser group, n = 274; non-laser group, n = 38)...
July 20, 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/28730184/associations-between-deceased-donor-urine-mcp-1-and-kidney-transplant-outcomes
#3
S G Mansour, J Puthumana, P P Reese, I E Hall, M D Doshi, F L Weng, B Schröppel, H Thiessen-Philbrook, M Bimali, C R Parikh
INTRODUCTION: Existing methods to predict recipient allograft function during deceased-donor kidney procurement are imprecise. Understanding the potential renal reparative role for monocyte chemoattractant protein-1 (MCP-1), a cytokine involved in macrophage recruitment after injury, might help predict allograft outcomes. METHODS: We conducted a sub-study of the multicenter prospective Deceased Donor Study cohort, which evaluated deceased kidney donors from five organ procurement organizations from May 2010 to December 2013...
July 2017: KI Reports
https://www.readbyqxmd.com/read/28726586/application-of-ureterorenoscope-and-flexible-ureterorenoscope-lithotripsy-in-removing-calculus-from-extracorporeal-living-donor-renal-graft-a-single-center-experience
#4
Chun-Hua Lin, Zuo-Fu Zhang, Jiahui Wang, Lu-Xin Yu, Wen-Ting Wang, Lei Shi, Xiang-Nan Lin
Here, we reported our clinical application of ureterorenoscope (URS) and flexible URS lithotripsy in stone removal on 10 cases of excised living donor kidney graft. After the extraction of donor kidney by retroperitoneal laparoscopy, the donor graft was perfused with 4 °C HCA solution. Calculus between 2-4 mm were removed intact with lithotomy forceps under direct vision of URS. Larger calculi of >4 mm were fractured with flexible URS combining holmium laser lithotripsy. Fragments of the calculus were extracted with basket extractor and lithotomy forceps...
November 2017: Renal Failure
https://www.readbyqxmd.com/read/28725436/factors-associated-with-increased-pancreatic-enzymes-in-septic-patients-a-prospective-study
#5
Anis Chaari, Karim Abdel Hakim, Nevine Rashed, Kamel Bousselmi, Vipin Kauts, Mahmoud Etman, William Francis Casey
BACKGROUND: The perfusion of splanchnic organs is deeply altered in patients with septic shock. The aim of the study is to identify the predictive factors of septic shock-induced increase of serum lipase and amylase and to assess and evaluate its prognostic impact. METHODS: We conducted a prospective observational study. All adult patients admitted with septic shock were eligible for our study. Serum lipase and amylase were measured on admission. Patients with and those without increased pancreatic enzymes were compared...
2017: Journal of Intensive Care
https://www.readbyqxmd.com/read/28725324/cardiorenal-syndrome-role-of-arginine-vasopressin-and-vaptans-in-heart-failure
#6
REVIEW
Poornima Vinod, Vinod Krishnappa, Abigail M Chauvin, Anshika Khare, Rupesh Raina
Heart and kidney failure continued to be of increasing prevalence in today's society, and their comorbidity has synergistic effect on the morbidity and mortality of patients. Cardiorenal syndrome (CRS) is a complex disease with multifactorial pathophysiology. Better understanding of this pathophysiological network is crucial for the successful intervention to prevent advancement of the disease process. One of the major factors in this process is neurohormonal activation, predominantly involving renin-angiotensin-aldosterone system (RAAS) and arginine vasopressin (AVP)...
June 2017: Cardiology Research
https://www.readbyqxmd.com/read/28724548/bradykinin-does-not-acutely-sensitize-the-reflex-pressor-response-during-hindlimb-skeletal-muscle-stretch-in-decerebrate-rats
#7
Korynne S Rollins, Joshua R Smith, Peter J Esau, Evan A Kempf, Tyler D Hopkins, Steven W Copp
Hindlimb skeletal muscle stretch (i.e., selective activation of the muscle mechanoreflex) in decerebrate rats evokes reflex increases in blood pressure and sympathetic nerve activity. Bradykinin has been found to sensitize mechano-gated channels through a bradykinin B2 receptor-dependent mechanism. Moreover, bradykinin B2 receptor expression on sensory neurons is increased following chronic femoral artery ligation in the rat (a model of simulated peripheral artery disease). We tested the hypothesis that, in decerebrate, unanesthetized rats, the injection of bradykinin into the arterial supply of a hindlimb would acutely augment (i...
July 19, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28715949/contrast-enhanced-ultrasound-for-assessing-renal-perfusion-impairment-and-predicting-acute-kidney-injury-to-chronic-kidney-disease-progression
#8
Wei Cao, Shuang Cui, Li Yang, Chunyi Wu, Jian Liu, Fang Yang, Youhua Liu, Jianping Bin, Fan Fan Hou
AIMS: Acute kidney injury (AKI) is increasingly recognized as a major risk factor leading to progression to chronic kidney disease (CKD). However, the diagnostic tools for predicting AKI to CKD progression are particularly lacking. Here, we tested the utility of contrast enhanced ultrasound (CEUS) for predicting progression to CKD after AKI by using both mild (20-minute) and severe (45-minute) bilateral renal ischemia/reperfusion injury (IRI) mice. RESULTS: Renal perfusion measured by CEUS reduced to 25%±7% and 14%±6% of the pre-ischemic levels in mild and severe AKI 1 hour after ischemia (P<0...
July 17, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28709662/neonatal-aortic-arch-reconstruction-with-direct-splanchnic-perfusion-avoids-deep-hypothermia
#9
Muhammad Aanish Raees, Clinton D Morgan, Venessa L Pinto, Ashly C Westrick, Chevis N Shannon, Karla G Christian, Bret A Mettler, David P Bichell
BACKGROUND: Neonatal aortic arch reconstruction, typically performed with deep hypothermia and selective cerebral perfusion, leaves splanchnic organ protection dependent on hypothermia alone. A simplified method of direct in-field descending aortic perfusion during neonatal arch reconstruction permits the avoidance of deep hypothermia. We hypothesize that direct splanchnic perfusion at mild hypothermia provides improved or equivalent safety compared with deep hypothermia and may contribute to postoperative extracardiac organ recovery...
July 11, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28709641/glucocest-magnetic-resonance-imaging-in%C3%A2-vivo-may-be-diagnostic-of-acute-renal-allograft-rejection
#10
Dominik Kentrup, Philipp Bovenkamp, Annika Busch, Katharina Schuette-Nuetgen, Helga Pawelski, Hermann Pavenstädt, Eberhard Schlatter, Karl-Heinz Herrmann, Jürgen R Reichenbach, Bettina Löffler, Barbara Heitplatz, Veerle Van Marck, Nirbhay N Yadav, Guanshu Liu, Peter C M van Zijl, Stefan Reuter, Verena Hoerr
Acute cellular renal allograft rejection (AR) frequently occurs after kidney transplantations. It is a sterile T-cell mediated inflammation leading to increased local glucose metabolism. Here we demonstrate in an allogeneic model of Brown Norway rat kidneys transplanted into uninephrectomized Lewis rats the successful implementation of the recently developed glucose chemical exchange saturation transfer (glucoCEST) magnetic resonance imaging. This technique is a novel method to assess and differentiate AR...
July 11, 2017: Kidney International
https://www.readbyqxmd.com/read/28708664/esmolol-administration-to-control-tachycardia-in-an-ovine-model-of-peritonitis
#11
Koji Hosokawa, Fuhong Su, Fabio Silvio Taccone, Emiel Hendrik Post, Adriano José Pereira, Antoine Herpain, Jacques Creteur, Jean-Louis Vincent
BACKGROUND: Excessive adrenergic signaling may be harmful in sepsis. Using β-blockers to reduce sympathetic overactivity may modulate sepsis-induced cardiovascular, metabolic, immunologic, and coagulation alterations. Using a randomized ovine fecal peritonitis model, we investigated whether administration of a short-acting β-blocker, esmolol, could control tachycardia without deleterious effects on hemodynamics, renal perfusion, cerebral perfusion, cerebral metabolism, or outcome. METHODS: After induction of fecal peritonitis, 14 anesthetized, mechanically ventilated, and hemodynamically monitored adult female sheep were randomly assigned to receive a continuous intravenous infusion of esmolol to control heart rate between 80 and 100 bpm (n = 7) or a saline infusion (control group, n = 7)...
July 13, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28708304/hyperpolarized-13-c-magnetic-resonance-evaluation-of-renal-ischemia-reperfusion-injury-in-a-murine-model
#12
Celine Baligand, Hecong Qin, Aisha True-Yasaki, Jeremy W Gordon, Cornelius von Morze, Justin Delos Santos, David M Wilson, Robert Raffai, Patrick M Cowley, Anthony J Baker, John Kurhanewicz, David H Lovett, Zhen Jane Wang
Acute kidney injury (AKI) is a major risk factor for the development of chronic kidney disease (CKD). Persistent oxidative stress and mitochondrial dysfunction are implicated across diverse forms of AKI and in the transition to CKD. In this study, we applied hyperpolarized (HP) (13) C dehydroascorbate (DHA) and (13) C pyruvate magnetic resonance spectroscopy (MRS) to investigate the renal redox capacity and mitochondrial pyruvate dehydrogenase (PDH) activity, respectively, in a murine model of AKI at baseline and 7 days after unilateral ischemia reperfusion injury (IRI)...
July 14, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28706270/comprehensive-multi-dimensional-mri-for-the-simultaneous-assessment-of-cardiopulmonary-anatomy-and-physiology
#13
Joseph Y Cheng, Tao Zhang, Marcus T Alley, Martin Uecker, Michael Lustig, John M Pauly, Shreyas S Vasanawala
Diagnostic testing often assesses the cardiovascular or respiratory systems in isolation, ignoring the major pathophysiologic interactions between the systems in many diseases. When both systems are assessed currently, multiple modalities are utilized in costly fashion with burdensome logistics and decreased accessibility. Thus, we have developed a new acquisition and reconstruction paradigm using the flexibility of MRI to enable a comprehensive exam from a single 5-15 min scan. We constructed a compressive-sensing approach to pseudo-randomly acquire highly subsampled, multi-dimensionally-encoded and time-stamped data from which we reconstruct volumetric cardiac and respiratory motion phases, contrast-agent dynamics, and blood flow velocity fields...
July 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28700167/-relevance-of-contrast-ultrasound-with-microbubbles-in-vascular-medecine
#14
Andreas Erdmann, Barbara Ney, Adriano Alatri, Luca Calanca, Lucia Mazzolai
Application of ultrasound contrast media has become a standard in diagnostic imaging in cardiology and in the characterization of focal lesions in multiple organs, especially of the liver. In the past years there was a growing body of evidence for their usefulness in vascular medicine. The development of contrast media, microbubbles with a stabilizing envelope and filled with gaz, small enough to pass through pulmonary capillaries made real-time imaging of organ perfusion possible. Ultrasound contrast media are rapidly eliminated by exhalation and can safely be administered to patients with renal failure...
December 7, 2016: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28699016/position-related-renal-perfusion-disturbances-as-a-possible-underestimated-mechanism-in-patients-with-resistant-hypertension-a-case-vignette
#15
Jan Schiefer, Holger Amthauer, Philipp Genseke, Peter R Mertens, Christos Chatzikyrkou
PURPOSE: In patients with resistant hypertension and large blood pressure fluctuations, the role of orthostatic hypertension, associated with position-dependent renal perfusion disturbances, has not been investigated in detail yet. METHODS: In this regard, four patients from our outpatient clinic were investigated by the use of 24-h ambulatory blood pressure monitoring (ABPM), active standing test, renal duplex sonography and Tc99m-mercaptoacetyltriglycine [MAG3] renal scintigraphy in supine and upright position...
July 11, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28696224/increased-perfusion-pressure-drives-renal-t-cell-infiltration-in-the-dahl-salt-sensitive-rat
#16
Louise C Evans, Galina Petrova, Theresa Kurth, John D Bukowy, David L Mattson, Allen W Cowley
Renal T-cell infiltration is a key component of salt-sensitive hypertension in Dahl salt-sensitive (SS) rats. Here, we use an electronic servo-control technique to determine the contribution of renal perfusion pressure to T-cell infiltration in the SS rat kidney. An aortic balloon occluder placed around the aorta between the renal arteries was used to maintain perfusion pressure to the left kidney at control levels, ≈128 mm Hg, during 7 days of salt-induced hypertension, whereas the right kidney was exposed to increased renal perfusion pressure that averaged 157±4 mm Hg by day 7 of high-salt diet...
July 10, 2017: Hypertension
https://www.readbyqxmd.com/read/28695560/minimally-invasive-extracorporeal-circulation-excellent-outcome-and-life-expectancy-after-coronary-artery-bypass-grafting-surgery
#17
Bernhard Winkler, Paul Philipp Heinisch, Grzegorz Zuk, Katarzyna Zuk, Brigitta Gahl, Hans-Jörg Jenni, Alexander Kadner, Christoph Huber, Thierry Carrel
OBJECTIVE: Coronary artery bypass grafting (CABG) remains the gold standard for complex revascularisation in multivessel disease. The concept of the minimally invasive extracorporeal circulation circuit (MiECC) was introduced to minimise pathophysiological side effects of conventional extracorporeal circulation. This study presents early and long-term outcomes after CABG with use of MiECC in a single-centre consecutive patient cohort. METHODS: From 1 January 2005 to 31 December 2010, 2130 patients underwent isolated CABG with MiECC at our centre...
July 11, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28693502/the-role-of-thrombectomy-and-diffusion-weighted-imaging-with-mri-in-post-transplant-renal-vein-thrombosis-a-case-report
#18
Paraish Misra, Anish Kirpalani, General Leung, Paraskevi A Vlachou, Jason Y Lee, Serge Jothy, Jeffrey Zaltzman, Darren A Yuen
BACKGROUND: Surgical thrombectomy in the context of acute renal vein thrombosis (RVT) post-transplantation has had limited success, with considerable variation in the surgical techniques used. Unfortunately, it is usually followed by allograft nephrectomy within a few days if rapid allograft recovery does not ensue. We report a case of acute RVT in which nephrectomy was not performed despite a prolonged requirement for dialysis post-thrombectomy, but with recovery of renal function 2 weeks later...
July 10, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28686936/differentiation-of-low-and-high-grade-clear-cell-renal-cell-carcinoma-tumor-size-versus-ct-perfusion-parameters
#19
Chao Chen, Qinqin Kang, Bing Xu, Hairuo Guo, Qiang Wei, Tiegong Wang, Hui Ye, Xinhuai Wu
PURPOSE: To compare the utility of tumor size and CT perfusion parameters for differentiation of low- and high-grade clear cell renal cell carcinoma (RCC). MATERIALS AND METHODS: Tumor size, Equivalent blood volume (Equiv BV), permeability surface-area product (PS), blood flow (BF), and Fuhrman pathological grading of clear cell RCC were retrospectively analyzed. RESULTS: High-grade clear cell RCC had significantly higher tumor size and lower PS than low grade...
July 3, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28685008/stress-spect-myocardial-perfusion-imaging-in-end-stage-renal-disease
#20
Yasmeen Golzar, Rami Doukky
PURPOSE OF REVIEW: Patients with end-stage renal disease (ESRD) have an increased risk of cardiovascular morbidity and mortality. Cardiac risk assessment, though challenging, is critical in these high-risk patients, particularly in the pre-transplant population. In this review, we discuss the burden of coronary artery disease in the ESRD population and review the literature on the diagnostic and prognostic performance, clinical value, and future directions of single-photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI) in ESRD patients...
May 2017: Current Cardiovascular Imaging Reports
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