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https://www.readbyqxmd.com/read/28523351/severity-specific-alterations-in-cbf-oef-and-cmro2-in-cirrhotic-patients-with-hepatic-encephalopathy
#1
Gang Zheng, Hanzhang Lu, Wenkui Yu, Song Luo, Ya Liu, Wei Liu, Hui Liu, Long Wu, Lijuan Zheng, Xiang Kong, Long Jiang Zhang, Guang Ming Lu
OBJECTIVES: To assess how the severity of hepatic encephalopathy (HE) affects perfusion and metabolic changes in cirrhotic patients and the association between severity and liver disease and anemia. METHODS: The study groups comprised 31 healthy subjects and 33 cirrhotic patients who underwent MR examinations, and blood and neuropsychological tests. Of the cirrhotic patients, 14 were unaffected, and 11 had covert HE (CHE) and 8 overt HE (OHE). Global cerebral blood flow (CBF), oxygen extraction fraction (OEF), and metabolic rate of oxygen (CMRO2) were noninvasively measured by phase-contrast and T2-relaxation-under-spin-tagging MRI...
May 18, 2017: European Radiology
https://www.readbyqxmd.com/read/28520696/an-ovine-model-of-hyperdynamic-endotoxemia-and-vital-organ-metabolism
#2
Liam Byrne, Nchafatso G Obonyo, Sara Diab, Kimble Dunster, Margaret Passmore, Ai Ching Boon, Louise See Hoe, Karen Hay, Frank Van Haren, John-Paul Tung, Louise Cullen, Kiran Shekar, Kathryn Maitland, John F Fraser
BACKGROUND: Animal models of endotoxemia are frequently used to understand the pathophysiology of sepsis and test new therapies. However, important differences exist between commonly used experimental models of endotoxemia and clinical sepsis. Animal models of endotoxemia frequently produce hypodynamic shock in contrast to clinical hyperdynamic shock. This difference may exaggerate the importance of hypoperfusion as a causative factor in organ dysfunction. This study sought to develop an ovine model of hyperdynamic endotoxemia and assess if there is evidence of impaired oxidative metabolism in the vital organs...
May 17, 2017: Shock
https://www.readbyqxmd.com/read/28520579/the-use-of-an-acellular-oxygen-carrier-in-a-human-liver-model-of-normothermic-machine-perfusion
#3
Richard W Laing, Ricky H Bhogal, Lorraine Wallace, Yuri Boteon, Desley A H Neil, Amanda Smith, Barney T F Stephenson, Andrea Schlegel, Stefan G Hübscher, Darius F Mirza, Simon C Afford, Hynek Mergental
BACKGROUND: Normothermic machine perfusion of the liver (NMP-L) is a novel technique that preserves liver grafts under near-physiological conditions whilst maintaining their normal metabolic activity. This process requires an adequate oxygen supply, typically delivered by packed red blood cells (RBC). We present the first experience using an acellular hemoglobin-based oxygen carrier (HBOC) Hemopure in a human model of NMP-L. METHODS: Five discarded high-risk human livers were perfused with HBOC-based perfusion fluid and matched to 5 RBC-perfused livers...
May 18, 2017: Transplantation
https://www.readbyqxmd.com/read/28514289/anti-angiogenic-therapy-with-contrast-enhanced-ultrasound-in-colorectal-cancer-patients-with-liver-metastasis
#4
Zhiyong Wu, Xiaowei Yang, Li Chen, Zhikuan Wang, Yan Shi, Hui Mao, Guanghai Dai, Xiaoling Yu
The aim of the study was to evaluate the efficacy of anti-angiogenic therapy with dynamic contrast-enhanced ultrasound (DCE-US) in colorectal cancer (CRC) patients with liver metastasis.A total of 50 CRC patients with liver metastasis who received bevacizumab (BEV)-based chemotherapy (BEV + FOLFOX6 protocol) were recruited into the present study. Before the study (d0), and 3, 7, 14, and 42 days (d3, d7, d14, and d42) after chemotherapy, DCE-US was performed, and tumor perfusion was evaluated quantitatively by retention time (RT), peak enhancement (PE), and wash-in area under the curve (WiAUC) on the basis of a contrast-uptake curve determined with original linear data...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28511589/a-semi-automatic-method-for-the-extraction-of-the-portal-venous-input-function-in-quantitative-dynamic-contrast-enhanced-ct-of-the-liver
#5
Andrew B Gill, Nicholas J Hilliard, Simon T Hilliard, Martin Graves, David J Lomas, Ashley Shaw
OBJECTIVES: To aid the extraction of the portal venous input function (PVIF) from axial dynamic contrast-enhanced CT images of the liver, eliminating the need for full manual outlining of the vessel across time-points. METHODS: A cohort of 20 patients undergoing perfusion CT imaging of the liver were examined. Dynamic images of the liver were reformatted into contiguous thin slices. A region of interest (ROI) was defined within a transverse section of the portal vein on a single contrast-enhanced image...
May 16, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28502673/glucosamine-modulates-propranolol-pharmacokinetics-via-intestinal-permeability-in-rats
#6
Hanadi A Al Shaker, Nidal A Qinna, Mujtaba Badr, Mahmoud M H Al Omari, Nasir Idkaidek, Khalid Z Matalka, Adnan A Badwan
Propranolol (PROP) undergoes extensive first-pass metabolism by the liver resulting in a relatively low bioavailability (13-23%); thus, multiple oral doses are required to achieve therapeutic effect. Since some studies have reported that glucosamine (GlcN) can increase the bioavailability of some drugs, therefore, it is aimed to study whether GlcN can change the pharmacokinetic parameters of PROP, thus modulating its bioavailability. When PROP was orally co-administered with GlcN (200mg/kg) to rats, PROP area under curve (AUC) and maximum concentration (Cmax) were significantly decreased by 43% (p<0...
May 11, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28501975/changes-in-liver-perfusion-and-function-before-and-after-percutaneous-occlusion-of-spontaneous-portosystemic-shunt
#7
Yasukazu Kako, Koichiro Yamakado, Wataru Jomoto, Toshiya Nasada, Koichiro Asada, Haruyuki Takaki, Kaoru Kobayashi, Takashi Daimon, Shozo Hirota
PURPOSE: To evaluate changes in liver perfusion after occlusion of spontaneous portosystemic shunt and to analyze mechanisms of liver profile improvement. MATERIALS AND METHODS: Liver function changes and portal venous and hepatic arterial blood flow were evaluated using perfusion CT before and after shunt occlusion in 23 patients who underwent percutaneous occlusion of spontaneous portosystemic shunt because of gastric varices (n = 15) or hepatic encephalopathy (n = 8)...
May 13, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28501779/coenzyme-q10-improves-the-survival-mesenteric-perfusion-organs-and-vessel-functions-in-septic-rats
#8
Erdem Kamil Ozer, Mustafa Tugrul Goktas, Ibrahim Kilinc, Sultan Pehlivan, Hulagu Bariskaner, Ceyhan Ugurluoglu, Alper Bektas Iskit
BACKGROUND: Coenzyme Q10 (CoQ10) is a naturally occurring, lipid-soluble antioxidant and an essential electron carrier in the mitochondrial respiratory chain. In sepsis, CoQ10 deficiency induced by mitochondrial failure can lead to hypoxia, hypoperfusion, oxidative organ damage and finally death. We aimed to investigate the effects of CoQ10 on survival, mesenteric artery blood flow (MABF), vascular reactivity, oxidative and inflammatory injuries in cecal ligation and puncture (CLP)-induced sepsis...
May 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28489167/preoperative-computed-tomography-volumetry-and-graft-weight-estimation-in-adult-living-donor-liver-transplantation
#9
Rafael S Pinheiro, Ruy J Cruz-Jr, Wellington Andraus, Liliana Ducatti, Rodrigo B Martino, Lucas S Nacif, Vinicius Rocha-Santos, Rubens M Arantes, Quirino Lai, Felicia S Ibuki, Manoel S Rocha, Luiz A C D Albuquerque
Background: Computed tomography volumetry (CTV) is a useful tool for predicting graft weights (GW) for living donor liver transplantation (LDLT). Few studies have examined the correlation between CTV and GW in normal liver parenchyma. Aim: To analyze the correlation between CTV and GW in an adult LDLT population and provide a systematic review of the existing mathematical models to calculate partial liver graft weight. Methods: Between January 2009 and January 2013, 28 consecutive donors undergoing right hepatectomy for LDLT were retrospectively reviewed...
January 2017: Arquivos Brasileiros de Cirurgia Digestiva: ABCD, Brazilian Archives of Digestive Surgery
https://www.readbyqxmd.com/read/28484189/perfusion-and-drainage-difference-in-the-liver-parenchyma-regional-plane-in-segment-6
#10
Hayato Abe, Shintaro Yamazaki, Masamichi Moriguchi, Tokio Higaki, Tadatoshi Takayama
The differences between the perfusion areas of portal vein and the drainage areas of hepatic vein result in the occurrence of either ischemic or congested areas after liver resection. To elucidate which factors are related to the differences between these areas of segment (S) 6 were therefore investigated. The portal-vein-based and hepatic-vein-based regional planes of S6 were defined using the region-growing and Voronoi tessellation methods in 103 consecutive patients who undergo liver resection. Finally, factors related to the difference between the perfusion and drainage areas of S6 were identified...
May 8, 2017: Bioscience Trends
https://www.readbyqxmd.com/read/28480722/hepatopulmonary-syndrome-with-large-pulmonary-arteriovenous-malformations-ct-findings-with-emphasis-on-its-association-with-a-mosaic-pattern-of-the-lung-parenchyma
#11
Luis Gorospe Sarasúa, Andreína Olavarría-Delgado, Frank Eric Farfán-Leal, Josefa Pérez-Templado Ladrón de Guevara
We present a case of a 54-year-old patient with cirrhosis, progressive dyspnea, and platypnea. Thoracic computed tomography (CT) showed multiple pulmonary arteriovenous malformations (PAVM), confirming the diagnosis of hepatopulmonary syndrome (HPS). Besides precisely identifying the number and location of PAVM, CT also demonstrated a striking mosaic pattern of the lung parenchyma, characterized by the presence of alternating geographic areas of low attenuation (showing pulmonary vessels with a decreased diameter) with regions of relatively increased attenuation (showing pulmonary vessels with a normal diameter)...
May 2017: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/28480062/locoregional-and-systemic-therapy-for-hepatocellular-carcinoma
#12
REVIEW
Olumide B Gbolahan, Michael A Schacht, Eric W Beckley, Thomas P LaRoche, Bert H O'Neil, Maximilian Pyko
The management of hepatocellular carcinoma (HCC) remains challenging due to late presentation and the presence of accompanying liver dysfunction. As such, most patients are not eligible for curative resection and liver transplant. Management in this scenario depends on a number of factors including hepatic function, tumor burden, patency of hepatic vasculature and patients' functional status. Based on these, patients can be offered catheter based intra-arterial therapy for intermediate stage disease and in more advanced disease, sorafenib...
April 2017: Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/28469688/significance-of-abnormal-myocardial-perfusion-scans-in-candidates-for-orthotopic-liver-transplantation
#13
Atefe Esmaili, Saeed Farzanefar, Alireza Emami-Ardakani, Mehrshad Abbasi
Background: The implications of cardiac risk stratification before orthotopic liver transplantation (OLT) are not well established. We studied the usefulness of myocardial perfusion imaging (MPI) in this scenario. Methods: MPI data of 24 patients (9 females), candidates of OLT, were collected. They underwent MPI as part of their preoperative risk assessment. MPIs were interpreted by 2 nuclear physicians, who had access to clinical data, scan, and semi-quantification results (i.e., quantitative perfusion single-photon emission tomography (SPECT) [QPS] and quantitative gated SPECT [QGS])...
January 2017: Journal of Tehran Heart Center
https://www.readbyqxmd.com/read/28463671/urgent-organ-retrieval-from-non-heart-beating-donor-with-declared-brain-death-harvest-at-arrest
#14
Ihsan Yıldız, Yavuz Savaş Koca, Mehmet Zafer Sabuncuoglu
OBJECTIVE: Due to insufficient donor number to meet the needs of organ transplantation, new researches are ongoing. In this context, the cases with cardiac arrest and brain dead are assessed as probable donors in recent years. The aim of this study is to discuss the healthfully techniques of organs retrieval with minimum damage and maximum rapidity in conditions of our center and to present our own experiences. MATERIAL AND METHOD: A total 4 of 13 patients brain dead declared and developed cardiac arrest while awaiting for laboratory test results in our center between 2015 and 2016, were urgently taken into operation under external heart massage and urgent organ retrieval were performed...
March 2017: Chirurgia
https://www.readbyqxmd.com/read/28461180/giant-symptomatic-aneurysm-secondary-to-hereditary-hemorrhagic-telangiectasia-of-a-main-hepatic-artery-with-aberrant-origin-in-superior-mesenteric-artery
#15
Francisco Javier Peinado Cebria N, Santiago Este Banez Seco, A Ngel Flores-Herrero, Ricardo Montoya Ching, Benito Mendez Feria, Diego Soto Valdés, Maria Pilar Lamarca Mendoza, Antonio Orgaz Pe Rez-Grueso
INTRODUCTION: Hereditary Hemorragic Telangiectasia (HHT) is a rare disease consistent in vascular dysplasias affecting different organs. Liver involvement includes telangiectases, arteriovenous shunting, and ischemic cholangitis, and its prevalence ranges from 8 to 31%. Spontaneous pseudo aneurysms have never been reported associated to HHT. Several variations in the origin of the main hepatic artery (MHA) have been described in large radiological series, and can be found in around 4% of general population...
April 28, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28460228/a-disposition-kinetic-study-of-tramadol-in-bile-duct-ligated-rats-in-perfused-rat-liver-model
#16
Zohre Esmaeili, Saeid Mohammadi, Alireza Nezami, Mohammad Reza Rouini, Yalda Hosseinzadeh Ardakani, Hoda Lavasani, Mahmoud Ghazi-Khansari
Tramadol hydrochloride is a centrally acting synthetic opioid analgesic drug and is used to treat chronic pain. In this study, the effects of Bile Duct Ligation (BDL) on the pharmacokinetics of tramadol in a liver recirculating perfusion system of male rats were used. Twenty-four Wistar male rats were randomly divided into four groups: control, sham and two weeks BDL and four weeks BDL. Serum levels of liver enzymes were measured before perfusion and the pharmacokinetics of tramadol was evaluated by using liver recirculating perfusion system...
April 28, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28459658/enhanced-oral-bioavailability-of-domperidone-with-piperine-in-male-wistar-rats-involvement-of-cyp3a1-and-p-gp-inhibition
#17
Bhargavi Latha Athukuri, Prasad Neerati
PURPOSE: Domperidone is a commonly used antiemetic drug. The oral bioavailability of domperidone is very low due to its rapid first pass metabolism in the intestine and liver. Piperine, the main alkaloid present in black pepper has been reported to show inhibitory effects on Cytochrome P-450 (CYP-450) enzymes and P-glycoprotein (P-gp). In the present study we investigated the effect of piperine pretreatment on the intestinal transport and oral bioavailability of domperidone in male Wistar rats...
2017: Journal of Pharmacy & Pharmaceutical Sciences: a Publication of the Canadian Society for Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28459157/infliximab-alleviates-the-mortality-mesenteric-hypoperfusion-aortic-dysfunction-and-multiple-organ-damage-in-septic-rats
#18
Erdem Kamil Ozer, Mustafa Tugrul Goktas, Ibrahim Kilinc, Aysun Toker, Hulagu Bariskaner, Ceyhan Ugurluoglu, Alper Bektas Iskit
Tumor necrosis factor-alpha (TNF-α) is a pivotal mediator that triggers inflammatory process, oxidative stress and multiple organ injury in sepsis. We investigated the effects of infliximab on survival, mesenteric artery blood flow (MBF), vascular reactivity, oxidative and inflammatory injuries in cecal ligation and puncture (CLP) induced sepsis. Wistar rats were divided into Sham, CLP, Sham+infliximab, CLP+infliximab subgroups. 24 hours before the operations rats were injected intraperitoneally with infliximab (7 mg/kg) or vehicle (saline; 1 mL/kg)...
April 29, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28457385/blood-lactate-concentrations-before-and-after-withdrawal-of-life-sustaining-treatments-in-controlled-donation-after-circulatory-death-a-case-report-from-italy
#19
F Baroncelli, M C Alberione, V Cacciotti, D Artusio, M Vergano, S Livigni
A 20-minute hands-off period with isoelectric electrocardiography (ECG) monitoring is currently required for the declaration of cardiac death in Italy, thus prolonging the warm ischemia time (WIT) during donation after circulatory death (DCD). Normothermic regional perfusion (NRP) can be a valid tool to optimize organ perfusion as a bridge to donation. A 62-year-old woman with catastrophic brain injury due to massive intracranial hemorrage, not fulfilling brain death criteria, underwent controlled DCD after withdrawal of life-sustaining therapies (WLST)...
May 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28457381/salvage-of-an-octogenarian-liver-graft-using-normothermic-perfusion-a-case-report
#20
D Pezzati, D Ghinolfi, E Balzano, P De Simone, L Coletti, N Roffi, E Rreka, L Meacci, D Campani, A Mazzoni, A Paolicchi, L Caponi, P Marchetti, L Marselli, F Filipponi
Liver transplantation with very old donors is safe, but is associated with an increased incidence of ischemic-type biliary lesions and delayed graft function. Normothermic machine perfusion (NMP) is a novel technique for preservation of liver grafts and has the potential to reduce ischemia-reperfusion injury. A case is reported here of a liver transplantation (LT) with a graft from an 83-year-old brain-dead donor. Procurement was with dual perfusion and en bloc, modified fast technique. Donor kidneys were not transplanted due to severe atherosclerosis and poor perfusion...
May 2017: Transplantation Proceedings
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