Abstract:
BACKGROUND:The Total Cavopulmonary Connection (TCPC), used for repair of patients with single ventricle physiology, creates a passive system of blood flow into the pulmonary circulation where enhanced energy efficiency may lead to improved long term patient outcomes. Previous numerical and in vitro studies using steady flow have shown that incorporation of SVC (superior vena cava) and IVC (inferior vena cava) offsets lead to decreased energy losses. We hypothesize that the optimal TCPC offset design found in these previous steady flow experiments may not be the optimal design in pulsatile flow situations. MATERIAL/METHODS:3-D finite volume numerical models were used to simulate flow through the total cavopulmonary connection. We ran steady and pulsatile flow experiments through 4 TCPC designs each with different SVC to IVC offsets (0.1/4, 1/2, 1 diameter offsets). The total energy (power) loss for each TCPC model was calculated. RESULTS:In steady flow experiments, % difference in energy loss between the most optimal and least optimal design was 26%. In contrast, in pulsatile flow experiments the % difference was only 8%. CONCLUSIONS:Our results demonstrate the improvements in energy loss seen using SVC-IVC offsets in steady flow experiments do not necessarily translate to pulsatile flow situations. Overall there was lower differences in efficiency between all TCPC designs in the pulsatile flow experiments. These results emphasize the need for further studies to fully define the relationship between energy losses and TCPC vessel architecture in non-steady flow physiologic situations.
journal_name
Med Sci Monitjournal_title
Medical science monitor : international medical journal of experimental and clinical researchauthors
DeGroff CG,Shandas Rsubject
Has Abstractpub_date
2002-03-01 00:00:00pages
MT41-5issue
3eissn
1234-1010issn
1643-3750pii
2262journal_volume
8pub_type
杂志文章abstract:BACKGROUND:Interferon-gamma release assays have not been validated in active TB among pregnant women. Therefore, the objective of this retrospective study was to estimate the diagnostic value of T-SPOT.TB in active TB among pregnant women. MATERIAL/METHODS:Between May 2012 and May 2015, 26 consecutive pregnant women w...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/msm.896943
更新日期:2016-01-06 00:00:00
abstract:BACKGROUND:Viral hepatitis C in children is milder than in adults. Patients with tumors, because of immune deficits, seem to be at risk of rapid liver disease progression. Little is known about the course of HCV and dual HBV-HCV infections in such patients. MATERIAL/METHODS:The study assessed clinical courses of HCV a...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2002-04-01 00:00:00
abstract:BACKGROUND:The aim of this study was to investigate the protective effects of L-glutamine (GLN) against liver and kidney injury caused by acute toxicity of deltamethrin (DLM). MATERIAL AND METHODS:Thirty-two rats were indiscriminately separated into 4 groups with 8 rats each: control group (distilled water; 10 ml/kg, ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.893180
更新日期:2015-04-19 00:00:00
abstract::The most prominent theory describes the Crohn's Syndrome as a dysregulated, inappropriate immune response to otherwise innocuous bowel flora in a genetically susceptible host. The autoimmune theory assumes that a specific infectious agent does not exist. Data from mouse models, impairment of the mucosal epithelial bar...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章,评审
doi:
更新日期:2006-02-01 00:00:00
abstract::BACKGROUND Gremlin has been reported to be up-regulated in glomerular mesangial cells in diabetic nephropathy (DN). However, the regulation of gremlin in podocytes is still rarely reported. This study aimed to investigate the underlying mechanisms by which gremlin mediates the pathogenesis of DN via transforming growt...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/msm.905758
更新日期:2018-01-09 00:00:00
abstract::BACKGROUND The aim of this study was to compare the clinical outcome in patients with pancreatic ductal adenocarcinoma who underwent frozen section and paraffin section histology of the surgical resection margins during pancreaticoduodenectomy. MATERIAL AND METHODS Frozen section and routine paraffin section histopath...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.910279
更新日期:2018-07-15 00:00:00
abstract:BACKGROUND:The aim of this study was to measure glenohumeral joint (GHJ) parameters via the anterior access through ultrasound and to compare to data from posterior and inferior accesses. MATERIAL AND METHODS:Twenty healthy controls (M: F=15: 5, aged 45.1±11.2 years) and 16 patients (M: F=5: 11, aged 54.6±14.7 years) ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.892520
更新日期:2015-02-18 00:00:00
abstract::BACKGROUND Chronic obstructive pulmonary disease (COPD) is a commonly diagnosed condition in people older than 50 years of age. In advanced stage of this disease, integrated care (IC) is recommended as an optimal approach. IC allows for holistic and patient-focused care carried out at the patient's home. The aim of th...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/msm.901982
更新日期:2017-06-12 00:00:00
abstract:BACKGROUND:Allergic rhinitis is considered a risk factor for bronchial asthma. It therefore seems essential to identify patients threatened with this disease in whom no disturbing bronchial symptoms have occurred. The study's aim was to evaluate the incidence of nonspecific bronchial hyperactivity based on exercise res...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2006-09-01 00:00:00
abstract:BACKGROUND:CC chemokine receptors are likely to have important roles in the regulation of leukocytes and mast cells. Chemokine receptors are crucial in orchestrating innate and acquired immune responses as well as in allergic inflammation. A disturbance in erythrocyte function can lead to bronchial hyperreactivity and ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2006-08-01 00:00:00
abstract:BACKGROUND:The purpose of the study was to evaluate the effects of MMR immunization and mercury from thimerosal-containing childhood vaccines on the prevalence of autism. MATERIAL/METHODS:Evaluations of the Biological Surveillance Summaries of the Centers for Disease Control and Prevention (CDC), the U.S. Department o...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2004-03-01 00:00:00
abstract:BACKGROUND:Sleep deprivation contributes to the development and recurrence of ventricular arrhythmias. However, the electrophysiological changes in ventricular myocytes in sleep deprivation are still unknown. MATERIAL AND METHODS:Sleep deprivation was induced by modified multiple platform technique. Fifty rats were as...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.893414
更新日期:2015-02-19 00:00:00
abstract::BACKGROUND Higher fetal hemoglobin (HbF) levels can ameliorate the clinical severity of ß-thalassemia. The use of integrative strategies to combine results from gene microarray expression profiling, experimental evidence, and bioinformatics helps reveal functional long noncoding RNAs (lncRNAs) in ß-thalassemia and HbF...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.915946
更新日期:2019-09-21 00:00:00
abstract:BACKGROUND:The aim of this cross-sectional study was to examine the relationship between obesity and lipid markers. MATERIAL AND METHODS:We divided 66 non-diabetic adult obese patients (mean age: 55.8±11.6 years) into 3 groups according to body mass index (BMI). All patients were measured for waist circumference (WC),...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.890845
更新日期:2014-12-16 00:00:00
abstract:BACKGROUND:Ventricular tachycardia (VT) is frequently seen in ischemic settings like acute myocardial infarction with ST segment elevation (STEMI). Endothelial dysfunction (ED) represents inflammation and the loss of all protective features of the endothelium. We aimed to examine the association between VT and ED in pa...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/msm.884026
更新日期:2013-11-20 00:00:00
abstract:BACKGROUND:There are many systemic complications of conventional selective renal arteriography (SRA), such as contrast-mediated nephropathy. Contrast-enhanced magnetic resonance angiography (CE-MRA) and renal artery Doppler ultrasonography (DUSG) have been used increasingly for renal artery stenosis (RAS). The aim of t...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.889035
更新日期:2013-06-19 00:00:00
abstract::BACKGROUND Liver cancer is a common malignant tumor with poor prognosis. The present study sought to identify potential signatures that can predict the prognosis of patients with liver cancer. MATERIAL AND METHODS The RNA sequencing (RNA-seq) and clinical information of liver cancer patients were obtained from the Can...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.920482
更新日期:2020-02-09 00:00:00
abstract::BACKGROUND Pedicle screw fixation is one of the most commonly used methods in spine surgery. We introduce a surgical robot system from China based on 3-dimensional fluoroscopy imaging and compare it with the commonly used O-arm navigation system. We study the differences in accuracy, safety, and clinical effect in aux...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.924770
更新日期:2020-09-12 00:00:00
abstract:BACKGROUND:Suicide gene therapy, particularly that utilizing the cytosine deaminase/5-fluorocytosine (CD/5-FC) system, represents a novel and attractive methodology of cancer research. Mechanistically, the CD enzyme can convert the antifungal agent 5-FC into the antimetabolite agent 5-fluorouracil (5-FU), thereby killi...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2009-01-01 00:00:00
abstract:BACKGROUND:The eradication of Helicobacter pylori (HP) is dependent on several bacteriologic and geographic variables. Multiple-drug regimens have been tried in order to eradicate HPi; however, the optimal drug has not yet been found. MATERIAL/METHODS:In this single-blind, randomized clinical trial, 245 dyspeptic pati...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:2005-04-01 00:00:00
abstract::BACKGROUND The aim of this study was to explore the regulating effects of Substance P (SP) on the collagen synthesis of rat myocardial fibroblasts (CFBs) induced by angiotensin II (Ang II) and its potential mechanism. MATERIAL AND METHODS The CFBs of a neonatal SD rat were separately cultured and divided into the cont...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/msm.898454
更新日期:2016-12-16 00:00:00
abstract::Telomeres are located at each end of eukaryotic chromosomes. Their functional role is genomic stability maintenance. The protective role of telomeres depends on various factors, including number of nucleotides repeats, telomere-binding proteins, and telomerase activity. Organ transplantation is the preferred replaceme...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章,评审
doi:10.12659/msm.899490
更新日期:2017-01-11 00:00:00
abstract::BACKGROUND Diabetic nephropathy (DN) is a potentially fatal complication of diabetes mellitus. While lifestyle changes can reduce diabetes risk, it is unclear whether improved lifestyle can slow or reverse DN progression. This study evaluated whether an intensive lifestyle intervention (IL-I) targeting weight loss and...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章,随机对照试验
doi:10.12659/MSM.913512
更新日期:2019-04-25 00:00:00
abstract:BACKGROUND:ACP1 (acid phosphatase locus 1, a cytosolic low-molecular-weight phosphotyrosin phosphatase) and ADA1 (adenosine deaminase locus 1) are two polymorphic systems involved in immune reactions. Observed interactions at the biochemical and clinical levels between the two systems prompted this investigation of a p...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2009-10-01 00:00:00
abstract::Non-small cell lung cancer (NSCLC) is the main histologic form of lung cancer that affects human health, but biomarkers for therapeutic diagnosis and prognosis of the disease are currently lacking. The gene expression profile GSE18842 was downloaded from the Gene Expression Omnibus database in this prospective study, ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.918620
更新日期:2019-12-05 00:00:00
abstract::BACKGROUND This retrospective study aimed to compare the roles of hand and wrist ultrasound in diagnosing subclinical synovitis in patients with systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA) at a single center in Sichuan, China. MATERIAL AND METHODS Forty-one patients with SLE and 20 patients with R...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.926436
更新日期:2020-12-12 00:00:00
abstract:BACKGROUND:To observe the effect of QiShenYiQi pill (QSYQ) on experimental autoimmune myocarditis rats, and to explore its mechanism of action. MATERIAL/METHODS:Lewis rats underwent the injection of myocardial myosin mixed with Freund's complete adjuvant were randomized into 3 groups: model, valsartan, and QSYQ groups...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/msm.895655
更新日期:2016-03-06 00:00:00
abstract::BACKGROUND The management of chronic unilateral hematuria (CUH) caused by benign lesions is a therapeutic challenge to many urologists. The aims of this study were to evaluate the efficacy and safety of povidone iodine sclerotherapy for CUH. MATERIAL AND METHODS We identified 20 patients who underwent povidone iodine ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.923552
更新日期:2020-07-21 00:00:00
abstract:BACKGROUND:The conditions encountered during military service in Afghanistan create number of different medical problems, resulting in interruptions in the performance of soldiers and even evacuation to the home country. A search of the literature yielded no comprehensive studies of medical problems of any single natio...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/msm.883194
更新日期:2012-07-01 00:00:00
abstract:BACKGROUND:This study aimed to determine the efficacy and safety of recombinant Mycobacterium tuberculosis ESAT-6 protein for diagnosis of pulmonary tuberculosis (TB). MATERIAL AND METHODS:A phase II trial was performed in 158 patients with pulmonary TB (145 initially-treated and 13 re-treated) and 133 healthy subject...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.889425
更新日期:2013-11-12 00:00:00