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A mixed-valent trinuclear complex with 1,3-bis(5-chlorosalicylideneamino)-2-propanol (H3clsalpr) was synthesized, and the crystal structure was determined by the single-crystal X-ray diffraction method at 90 K. The molecule is a trinuclear CoIII-CoII-CoIII complex with octahedral geometries, having a tetradentate chelate of the Schiff-base ligand, bridging acetate, monodentate acetate coordination to each terminal Co3+ ion and four bridging phenoxido-oxygen of two Schiff-base ligands, and two bridging acetate-oxygen atoms for the central Co2+ ion. The electronic spectral feature is consistent with the mixed valent CoIII-CoII-CoIII. Variable-temperature magnetic susceptibility data could be analyzed by consideration of the axial distortion of the central Co2+ ion with the parameters Δ = –254 cm−1, λ = –58 cm−1, κ = 0.93, tip = 0.00436 cm3 mol−1, θ = –0.469 K, gz = 6.90, and gx = 2.64, in accordance with a large anisotropy. The cyclic voltammogram showed an irreversible reduction wave at approximately −1.2 V·vs. Fc/Fc+, assignable to the reduction of the terminal Co3+ ions. [ABSTRACT FROM AUTHOR]

A broad consensus has not been reached on the appropriate timing for cessation of peritoneal dialysis (PD). Decreasing urine volume, repeated and refractory peritonitis, and deterioration of the peritoneal membrane are major reasons to stop PD. Also, the link between length of time on PD and encapsulating peritoneal sclerosis (EPS) should be an additional concern. The aim of the present study was to investigate patients who had been on continuous ambulatory PD (CAPD) for a long time. All patients undergoing CAPD at our kidney center for more than a decade from January 1990 to September 2011 were included in the study. Among more than 436 CAPD patients, 11 met the inclusion criteria. Their mean PD duration was 12.3 +/- 3.1 years. Mean age at CAPD introduction had been 46.0 +/- 10.1 years. All patients had nondiabetic nephropathy as the underlying cause of their end-stage renal disease. At least 2 of the 11 had developed EPS, and 1 had subsequently died from EPS. Patients on prolonged CAPD for more than a decade are still rare. The CAPD modality may be continued if it is efficiently maintained within an acceptable level, but EPS remains a serious complication of prolonged PD.

Peritonitis remains a leading complication of peritoneal dialysis (PD). The aim of this observational retrospective cohort study, conducted at our single center, was to determine the risk factors for peritonitis. A Cox proportional hazards model was used for the multivariate analysis. The event investigated was peritonitis, and the variables studied were sex, age, diabetes mellitus, use of statins, and several laboratory values including albumin and total cholesterol. All PD patients who visited our clinic from January 2005 to September 2011 and who had complete medical records for at least 3 years were included. Among the 82 patients who met the criteria (mean period of observation: 1086 +/- 752 days; mean age: 62.0 +/- 12.3 years), 47 had experienced at least 1 episode of peritonitis. Aging was a significant risk factor for peritonitis, with a relative risk of 1.04 per year (p = 0.014). In our study, aging--rather than diabetes mellitus, efficiency of PD, or nutrition status--was an important risk factor for PD-associated peritonitis. Poor PD technique because of advanced age might be one of the reasons for this result.