Publications by authors named "Marc Dorval"

Background And Objectives: Glucose control is a significant predictor of mortality in diabetic peritoneal dialysis (PD) patients. During PD, the local toxic effects of intra-peritoneal glucose are well recognized, but despite large amounts of glucose being absorbed, the systemic effects of this in non-diabetic patients are not clear. We sought to clarify whether dialysate glucose has an effect upon systemic glucose metabolism.

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Background/aims: Poor glycemic control can lead to increased morbidity and mortality in peritoneal dialysis (PD) patients. Serum fructosamine may be a more reliable marker of glycemic control than HbA1c in dialysis patients.

Methods: We evaluated the effects of a glucose-sparing PD regimen on serum fructosamine.

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In a recent randomized trial, weekly recombinant tissue plasminogen activator (rt-PA), 1 mg per lumen, once per week, and twice-weekly heparin as a locking solution (rt-PA/heparin) resulted in lower risks of hemodialysis catheter malfunction and catheter-related bacteremia compared with thrice-weekly heparin (heparin alone). We collected detailed costs within this trial to determine how choice of locking solution would affect overall health care costs, including the cost of locking solutions and all other relevant medical costs over the course of the 6-month trial. Nonparametric bootstrap estimates were used to derive 95% confidence intervals (CIs) and mean cost differences between the treatment groups.

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Heparin is used to prevent clotting during hemodialysis, but heparin-free hemodialysis is sometimes needed to decrease the risk of bleeding. The HepZero study is a randomized, multicenter international controlled open-label trial comparing no-heparin hemodialysis strategies designed to assess non-inferiority of a heparin grafted dialyzer (NCT01318486). A total of 251 maintenance hemodialysis patients at increased risk of hemorrhage were randomly allocated for up to three heparin-free hemodialysis sessions using a heparin-grafted dialyzer or the center standard-of-care consisting of regular saline flushes or pre-dilution.

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Systemic inflammation, as evidenced by elevated inflammatory cytokines, is a feature of advanced renal failure and predicts worse survival. Dialysate IL-6 concentrations associate with variability in peritoneal small solute transport rate (PSTR), which has also been linked to patient survival. Here, we determined the link between systemic and intraperitoneal inflammation with regards to peritoneal membrane function and patient survival as part of the Global Fluid Study, a multinational, multicenter, prospective, combined incident and prevalent cohort study (n=959 patients) with up to 8 years of follow-up.

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Background: Anticoagulation for chronic dialysis patients with contraindications to heparin administration is challenging. Current guidelines state that in patients with increased bleeding risks, strategies that can induce systemic anticoagulation should be avoided. Heparin-free dialysis using intermittent saline flushes is widely adopted as the method of choice for patients at risk of bleeding, although on-line blood predilution may also be used.

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Context: Synthetic arteriovenous grafts, an important option for hemodialysis vascular access, are prone to recurrent stenosis and thrombosis. Supplementation with fish oils has theoretical appeal for preventing these outcomes.

Objective: To determine the effect of fish oil on synthetic hemodialysis graft patency and cardiovascular events.

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Background: Arteriovenous grafts (AVG) are the predominant form of permanent vascular access used among hemodialysis (HD) patients in North America but suffer from high intervention and complication rates associated with vascular stenosis. The fish oil inhibition of stenosis in hemodialysis grafts (FISH) study evaluates the efficacy of fish oil in improving HD graft patency.

Methods: This study is a multi-center, randomized, double blind placebo-controlled clinical trial of 232 chronic HD patients who require a new graft access.

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Background: Many patients with end-stage renal disease use a central venous catheter for hemodialysis access. A large majority of these catheters malfunction within one year of insertion, with up to two-thirds due to thrombosis. The optimal solution for locking the catheter between hemodialysis sessions, to decrease the risk of thrombosis and catheter malfunction, is unknown.

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The purpose of this quasi-experimental study was to compare two teaching methods of a predialysis educational program, namely on-site and by distance. This program was offered to patients with chronic kidney disease (CKD) stage 3. The experimental group one received the on-site program, whereas the experimental group two received the teaching program by distance.

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Objective: Validation of a novel citrate anticoagulation regimen for continuous venovenous hemodiafiltration (CVVHDF).

Design And Setting: Prospective cohort trial in medicosurgical intensive care units of two university-affiliated teaching institutions.

Patients: Participants were patients at high risk for bleeding, with renal failure requiring CVVHDF without heparin.

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Background/aims: Review of bone marrow transplant (BMT) cases admitted to our intensive care unit (ICU) and to compare co-morbidity and outcome of BMT patients developing or not developing acute renal failure (ARF).

Methods: A case review of BMT patients admitted to the ICU (a 16-bed medico-surgical ICU in a tertiary care teaching institution) over a 4-year period.

Results: Between January 1994 and December 1998, 57 among 441 BMT patients (12.

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