Abstract:
:Arteriovenous fistula (AVF) failure is mainly due to venous stenosis characterized by significant amount of intima-media thickening (IMT), probably in the presence of negative (inward) remodeling. Our hypothesis is that the longitudinal changes in wall shear stress (WSS) within different configurations of AVF can influence remodeling factors (changes in luminal diameter (ΔDh ) and IMT) during its maturation process. Dh is an equivalent diameter for a noncircular conduit. A total of six AVFs with curved (C-AVF; n = 3) and straight (S-AVF; n = 3) configurations were created between the femoral artery and vein of three pigs, bilaterally. CT scans and ultrasounds were utilized to calculate local WSS at 2D (D: days), 7D, and 28D postsurgery. For each AVF, IMT was measured at four regions along the vein using morphometric analyses. At these regions, repeated measurements of WSS and luminal diameter of each AVF were obtained over time. The ΔD(h) between 7D and 28D was significantly larger for C-AVF than for S-AVF (2.27 ± 0.67 mm vs. 0.02 ± 0.55 mm; p < 0.05). Also, at 28D the amount of IMT in C-AVF (77.46 ± 7.10 units) was significantly greater (p < 0.05) when compared with S-AVF (53.71 ± 8.23 units). These structural changes were accompanied by significantly different gradients of WSS over time (τ') for C-AVF (-0.56 ± 0.60 dyne/cm(2)/day) in comparison with S-AVF (0.71 ± 0.39 dyne/cm(2)/day). Negative τ' for C-AVF corresponded to reduction in WSS level over time resulting in a physiological level of WSS at 28D (4.08 ± 5.08 dyne/cm(2)). In contrast, a positive τ' for S-AVF was associated with the increase in WSS levels over time causing high levels of WSS at 28D (36.68 ± 5.32 dyne/cm(2)). The decrease in WSS levels for the C-AVF over time was associated with outward remodeling of the venous wall (favorable to maturation). In contrast, for S-AVF, the increase in WSS levels over time was associated with inward remodeling and subsequently, venous stenosis. Thus, temporal gradients of WSS, which could be altered by the surgical configuration of AVF, may provide important information on the remodeling behavior of AVFs. Identification of an optimal AVF configuration, which results in a temporal decrease in WSS and an outward remodeling of the venous wall, may reduce AVF maturation failure.
journal_name
Semin Dialjournal_title
Seminars in dialysisauthors
Rajabi-Jagahrgh E,Krishnamoorthy MK,Wang Y,Choe A,Roy-Chaudhury P,Banerjee RKdoi
10.1111/sdi.12045subject
Has Abstractpub_date
2013-07-01 00:00:00pages
511-9issue
4eissn
0894-0959issn
1525-139Xjournal_volume
26pub_type
杂志文章abstract::Arteriovenous grafts (AVGs) suffer from high thrombosis rates. It is not known whether placement of stent grafts at the venous anastomosis (VA) of thrombosed AVGs would impact future thrombosis. This is a retrospective study evaluating a group of AVGs that underwent endovascular thrombectomy with placement of a stent ...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/sdi.12254
更新日期:2014-11-01 00:00:00
abstract::There is abundant evidence that chronic renal failure (CRF) and end-stage renal disease (ESRD) alter drug disposition by affecting protein and tissue binding and reducing systemic clearance of renally cleared drugs. What is not fully appreciated is that CRF can significantly reduce nonrenal clearance and alter the bio...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1046/j.1525-139x.2003.03011.x
更新日期:2003-01-01 00:00:00
abstract::Managing an end-stage renal disease (ESRD) patient is complex and presents many ethical challenges for the physician. Ownership of dialysis facilities has shifted over the past decade from largely nonprofit organizations to large companies whose shareholders are primarily interested in the profitability of their inves...
journal_title:Seminars in dialysis
pub_type: 社论
doi:10.1111/j.1525-139x.2004.17102.x
更新日期:2004-01-01 00:00:00
abstract::The elderly people, 65 years old and above, are growing in number. The structural and functional changes associated with aging place the elderly at risk when challenged by extracorporeal therapies, such as therapeutic plasma exchange (TPE). We retrospectively analyzed data on all patients who underwent TPE for renal i...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/j.1525-139X.2011.01027.x
更新日期:2012-03-01 00:00:00
abstract::Several neurologic disorders have been treated with therapeutic plasma exchange (TPE). Case reports, case series, and clinical trials have published results regarding the outcomes in such patients. The data gathered have been used to formulate evidence-based guidelines, which can be used to guide therapy in patients w...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/j.1525-139X.2011.01023.x
更新日期:2012-03-01 00:00:00
abstract::Hepatitis C virus (HCV) infection is not only an important cause of chronic liver disease, but extrahepatic manifestations are common and include chronic kidney disease (CKD). HCV is classically associated with cryoglobulinemic glomerulonephritis in the context of mixed cryoglobulinemia syndrome, but other glomerular ...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/sdi.12759
更新日期:2019-03-01 00:00:00
abstract::In the United States, presently there are more than 50,000 patients with end-stage renal disease (ESRD) awaiting a cadaveric kidney and each year less than a quarter receive kidney transplantation. Although the real incidence in unknown, a significant number of these patients die due to lack of dialysis access. While ...
journal_title:Seminars in dialysis
pub_type: 社论
doi:10.1046/j.1525-139x.2002.00001.x
更新日期:2002-01-01 00:00:00
abstract::Laughter and humor therapy have been used in health care to achieve physiological and psychological health-related benefits. The application of these therapies to the dialysis context remains unclear. This paper reviews the evidence related to laughter and humor therapy as a medical therapy relevant to the dialysis pa...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/sdi.12194
更新日期:2014-09-01 00:00:00
abstract::The in-center dialysis unit and practice of dialysis, in the current multi-team approach, requires knowledge and skills in all the domains including medical expert, communicator, collaborator, scholar, health advocate, and leader. We are tasked as a community, to embrace and incentivize new innovations and technology ...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/sdi.12668
更新日期:2018-03-01 00:00:00
abstract::Traction and cutdown techniques can successfully remove a tunneled dialysis catheter (TDC) in a great majority of patients. However, these methods may not be successful in patients with catheters that are tethered or attached to the central veins or the atrium. A forceful application of traction can lead to catheter b...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/j.1525-139X.2009.00646.x
更新日期:2009-11-01 00:00:00
abstract::While vascular ultrasound (US) has been highlighted to detect vascular access stenosis, its accuracy in the identification of inflow stenosis (IS) (anastomosis and/or juxta-anastomotic area) compared with the gold standard (angiography) has not been evaluated. One hundred three consecutive fistulae referred for interv...
journal_title:Seminars in dialysis
pub_type: 临床试验,杂志文章
doi:10.1111/j.1525-139X.2009.00693.x
更新日期:2010-01-01 00:00:00
abstract::Extracorporeal elimination of drugs and toxins is a critical component in the management of poisonings, though specific techniques and indications remain a matter of debate. Conventional hemodialysis is frequently the treatment of choice because of its widespread availability and proven effectiveness for certain drugs...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/j.1525-139X.2006.00194.x
更新日期:2006-09-01 00:00:00
abstract::Both the morbidity of the uremic syndrome and the generation of uremic toxins are attributed to malnutrition. If protein intake and catabolism result in the generation of solutes, then nutritional intake should be related directly to toxicity. On the other hand, inadequate nutrition has been linked to inflammation and...
journal_title:Seminars in dialysis
pub_type: 社论
doi:10.1046/j.1525-139x.2002.00076.x
更新日期:2002-09-01 00:00:00
abstract::Dialysis providers are increasingly being presented with progressively older and frailer patients, in all healthcare settings from the acute hospital to the community dialysis center. These patients commonly bring more than kidney failure with them, with a complex constellation of chronic illness, comorbidity, and fun...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/sdi.12027
更新日期:2012-11-01 00:00:00
abstract::Continuous Renal Replacement Therapy (CRRT) usually requires anticoagulation to prevent clotting of the extracorporeal circuit. Interruptions due to filter clotting significantly reduce total therapy time and CRRT efficacy. Although heparin has traditionally been the most common anticoagulant used for CRRT, increasing...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/sdi.12503
更新日期:2016-07-01 00:00:00
abstract::Despite having thousands of blood pressure (BP) readings on individual dialysis patients over the course of a year, our knowledge about the optimal assessment of BP, the mechanisms underlying hypertension and its management remain incomplete. Observational studies reveal that BP is lower at home than when measured in ...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/sdi.12586
更新日期:2017-05-01 00:00:00
abstract::As suggested by its American brand name (Sensipar), the calcimimetic cinacalcet sensitizes the parathyroid cells to the extracellular calcium signal, suppressing parathyroid hormone (PTH) release and synthesis and preventing parathyroid cell proliferation. This primary PTH suppression decreases the release of calcium ...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/j.1525-139X.2005.18318.x
更新日期:2005-05-01 00:00:00
abstract::Anemia is a common complication of advanced chronic kidney disease (CKD). Treatment with erythropoiesis-stimulating agents (ESAs) remains a common approach in managing anemia of CKD. The 2012 Kidney Disease Improving Global Outcomes Clinical Practice Guideline for Anemia in CKD suggests avoiding ESA therapy use to mai...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/sdi.12683
更新日期:2018-07-01 00:00:00
abstract::The use of stents has been steadily increasing in the management of dialysis access dysfunction. The purpose of this report was to review the use of covered stents in failed forearm fistulas and describe a case of the use of a small caliber forearm covered stent in a early failed forearm fistula that allowed dialysis ...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/j.1525-139X.2008.00473.x
更新日期:2009-01-01 00:00:00
abstract::United States standards for the microbiologic quality of dialysate are not very stringent and have remained unchanged for more than 20 years, despite significant changes in the patient population and in the technology of hemodialysis. Numerous studies have demonstrated that bacterial products can cross dialysis membra...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1046/j.1525-139x.2000.00103.x
更新日期:2000-11-01 00:00:00
abstract::Severe hypothermia is defined as a core body temperature <28°C and is associated with in-hospital mortality rates of 50% or higher. Delays in rewarming and slower rates of rewarming are the most important prognostic factors associated with increased mortality. Arrhythmias are the most common cause of mortality in pati...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/sdi.12156
更新日期:2014-05-01 00:00:00
abstract::To prevent pyrogenic reactions during hemodialysis, it is recommended that bacteria and endotoxin in dialysate not exceed 100-200 colony forming units (CFU)/ml and 0.25-2 endotoxin units (EU)/ml, respectively. While these limits are adequate to prevent acute pyrogenic reactions, data are accumulating to suggest they m...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/j.0894-0959.2004.17617.x
更新日期:2004-11-01 00:00:00
abstract::A hemodialysis access may lead to cardiac overload (CO) or hand ischemia [hemodialysis access induced distal ischemia (HAIDI). Surgical banding restricts access flow and promotes distal perfusion. Aim of the study was to investigate short- and long-term clinical success of banding in these patient groups. After evalua...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/j.1525-139X.2008.00537.x
更新日期:2009-03-01 00:00:00
abstract::With the current understanding that atherosclerosis is an inflammatory disorder, markers of the associated systemic inflammatory response have been extensively studied as predictors of cardiovascular disease. Recently the use of high-sensitivity C-reactive protein (hsCRP) has been proposed for risk assessment in indiv...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/j.1525-139X.2006.00138.x
更新日期:2006-03-01 00:00:00
abstract::Catheter recirculation (CR) occurs when blood returning from the venous limb of the catheter re-enters the arterial limb of the catheter without passage through the circulation. Adequacy of dialysis is influenced by the degree of access recirculation. In this study we evaluate factors influencing the degree of dialysi...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/j.1525-139X.2008.00442.x
更新日期:2008-05-01 00:00:00
abstract::Recent studies have shown that patients with high peritoneal transport characteristics have substantially increased morbidity and mortality. This finding is counter-intuitive, since HTs will a priori achieve higher clearances. There are many possible causes: increased protein losses with consequent hypoalbuminemia; po...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1046/j.1525-139x.2000.00051.x
更新日期:2000-05-01 00:00:00
abstract::Depression has been documented as the most frequently encountered psychological problem in end-stage renal disease (ESRD) patients and has been correlated with both mortality and morbidity in these patients. Previous work by our group has shown that clinical depression is treatable with psychotropic medications in the...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1046/j.1525-139x.2003.16094.x
更新日期:2003-11-01 00:00:00
abstract::Pregnancy occurs uncommonly in women with chronic kidney disease (CKD) and fetal outcome tends to be poor, with high rates of prematurity and mortality. Dialysis, by complementing residual renal function, may improve fetal outcome in pregnant women with CKD. Although there are no prospective or randomized trials that ...
journal_title:Seminars in dialysis
pub_type: 社论,评审
doi:10.1046/j.1525-139x.2003.16084_1.x
更新日期:2003-09-01 00:00:00
abstract::Determining dry weight and assessing extracellular fluid volume in hemodialysis (HD) patients is one of the greatest challenges to practicing nephrologists. The clinical examination has limited accuracy, so different strategies have been investigated to aid in this evaluation. Biochemical markers of volume overload (A...
journal_title:Seminars in dialysis
pub_type: 杂志文章,评审
doi:10.1111/j.1525-139x.2004.17112.x
更新日期:2004-01-01 00:00:00
abstract::A procedure-related complication is an unanticipated adverse event that requires therapy. In order to analyze frequency and severity of complications in the process of quality assurance, it is useful to have a classification of complications, indicating the type and severity. The Clinical Practice Committee of America...
journal_title:Seminars in dialysis
pub_type: 杂志文章
doi:10.1111/j.1525-139X.2007.00318.x
更新日期:2007-07-01 00:00:00