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Background Catheter-associated infections markedly contribute to treatment failure in peritoneal dialysis (PD) patients. There is much controversy surrounding prophylactic strategies to prevent these infections. Methods In this nationwide multicenter study we analyzed strategies to prevent catheter-associated infections as performed in Austrian PD centers in 2006. A questionnaire was sent to all 23 PD centers in Austria. Results Ten different catheter models were used in the 332 patients being treated in the 23 Austrian PD centers. Systemic antibiotics prior to catheter placement were given by 17 of the 23 PD centers (glycopeptides, n = 7; cephalosporins, n = 10). Nasal swabs were taken preoperatively by 17 PD centers; nasal Staphylococcus aureus carriers were treated prophylactically with mupirocin cream in 15 of these centers. Dressing change was routinely performed in 318 of 332 chronic PD patients (nonocclusive film dressing, n = 58; gauze dressing, n = 260). Disinfectants for chronic exit-site care included povidone iodine ( n = 155), sodium hypochlorite ( n = 31), povidone iodine + sodium hypochlorite together ( n = 102), and octenidine dihydrochloride/phenoxyethanol ( n = 17). Water+non-disinfectant soap or 0.9% sodium chloride was administered as a cleansing agent to the exit site by 27 patients. Routine S. aureus screening (nasal and/or exit-site swabs) in chronic PD patients was performed in 12 PD centers; carriers were treated with mupirocin cream in 11 of these centers. Dialysis staff members were screened for S. aureus in 8 PD centers and spouses were screened for S. aureus in 5 PD centers. The overall exit-site infection rate was 1 episode/43.9 patient-months, tunnel infection rate was 1 episode/88.9 patient-months, and peritonitis rate was 1 episode/51.0 patient-months. Patients of centers that have installed a prophylaxis protocol for treating S. aureus carriers had lower mean infection rates compared with those not using such a protocol. Conclusion Various individual prophylactic strategies are used to prevent catheter-associated infections in Austrian PD centers. Infection rates are within the range reported in the literature. There is still scope for improvement in some centers ( e.g., by establishing a prophylaxis protocol).

Determination of urinary β2-microglobulin possibly allows early detection of renal damage by fumaric acid esters. Female patients seem to be prone to this side-effect, especially when taking high doses.

Vascular calcifications are very common in dialysis patients and have been shown to be associated independently with outcome. However, all of these studies used prevalent patients on dialysis since many years. We investigated vascular calcifications in an inception cohort of dialysis patients and followed them for cardiovascular disease outcomes during an average observation period of 66 months. One hundred and fifty-four Caucasian dialysis patients were enrolled in one Austrian dialysis center. Standardized plain radiographs from the pelvis and calves were carried out in all patients at the start of dialysis therapy. Vascular calcifications were assessed by a single radiologist. At the start of renal replacement therapy, 67.5% of the patients showed vascular calcifications. During follow-up, 29.9% of patients suffered a cardiovascular event. An additive 'vascular risk score', constructed from the presence of vascular calcifications and/or previous cardiovascular events before the start of dialysis treatment, showed the strongest independent association with cardiovascular events in the Cox regression model adjusted for various risk factors. The presence of each of these two conditions was associated with a hazard ratio of 2.03 (95% confidence interval 1.19-3.46) and a hazard ratio twice as high if both conditions were present. In summary, vascular calcifications on plain X-rays of pelvis and calves are largely present in incident dialysis patients. A history of a cardiovascular event in the predialysis period together with vascular calcifications at the beginning of dialysis therapy is a more powerful predictor of a cardiovascular event than age, smoking, diabetes, or other traditional risk factors.

BackgroundVitamin D deficiency is highly prevalent in dialysis patients. Whether substitution of native vitamin D in these patients is beneficial is a matter of ongoing discussion, as is the optimal dosing schedule. The purpose of this study was to investigate the efficacy and safety of a body-weight adapted oral dosing regimen of cholecalciferol in dialysis patients.MethodsIn a prospective single-center study 56 prevalent dialysis patients with a baseline 25OHD3 level <20 ng/mL received 100 IU of cholecalciferol per kg body weight once weekly orally for 26 weeks. 25OHD3 was measured at baseline and at study end, iPTH every three months, serum calcium and phosphorous monthly. Concurrent medication including phosphate binders, calcitriol and cinacalcet and dialysate calcium concentration remained unchanged throughout the study.ResultsBaseline 25OHD3 was 9.9 ± 4.1 ng/mL and increased to 26.1 ± 8.8 ng/mL (P = 0.01). Fourteen patients (27 %) achieved a level >30 ng/mL and all others above 20 ng/mL. Cinacalcet therapy was positively associated with the increase in 25OHD3 (P = 0.024). The plasma iPTH level significantly decreased from median 362 pg/mL to 297 pg/mL (P = 0.01). This decline was more pronounced in patients with higher baseline iPTH levels (P < 0.01) and differed significantly dependent on concurrent calcitriol therapy. A significant iPTH decrease was observed in patients receiving calcitriol (P = 0.031). Serum calcium and phosphorous did not change significantly throughout the study period. Cholecalciferol substitution was well tolerated without adverse effects.ConclusionThe dosing regimen of oral cholecalciferol supplementation with 100 IU per kg body weight per week for 26 weeks in dialysis patients with vitamin D deficiency causes a significant increase in 25OHD3 close to the supposed target level of 30 ng/mL and a significant reduction in iPTH, without affecting serum calcium or phosphorous levels.