Higher Eosinophils Predict Death-Censored Technique Failure in Peritoneal Dialysis Patients

Background: Technique failure is an important outcome measure in research and quality improvement in peritoneal dialysis (PD) programs, but there is a lack of consistency in how it is reported. Methods: We used data collected about incident dialysis patients from 10 Canadian dialysis programs between 1 January 2004 and 31 December 2018. We identified four main steps that are required when calculating the risk of technique failure. We changed one variable at a time, and then all steps, simultaneously, to determine the impact on the observed risk of technique failure at 24 months. Results: A total of 1448 patients received PD. Selecting different cohorts of PD patients changed the observed risk of technique failure at 24 months by 2%. More than one-third of patients who switched to hemodialysis returned to PD—90% returned within 180 days. The use of different time windows of observation for a return to PD resulted in risks of technique failure that differed by 16%. The way in which exit events were handled during the time window impacted the risk of technique failure by 4% and choice of statistical method changed results by 4%. Overall, the observed risk of technique failure at 24 months differed by 20%, simply by applying different approaches to the same data set. Conclusions: The approach to reporting technique failure has an important impact on the observed results. We present a robust and transparent methodology to track technique failure over time and to compare performance between programs.

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Characteristics and Outcomes of Fungal Peritonitis in a Modern North American Cohort

Peritoneal Dialysis International ◽

10.3747/pdi.2013.00179 ◽

2015 ◽

Vol 35 (1) ◽

pp. 78-84 ◽

Cited By ~ 12

Author(s):

Annie-Claire Nadeau-Fredette ◽

Joanne M Bargman

Keyword(s):

Peritoneal Dialysis ◽

North American ◽

Significant Proportion ◽

Dialysis Patients ◽

Fungal Peritonitis ◽

Risk Of Death ◽

Dialysis Vintage ◽

Unit Increase ◽

Wbc Count ◽

Technique Failure

IntroductionPeritonitis remains a common complication of peritoneal dialysis (PD). Although representing only 1 – 12% of overall peritonitis in dialysis patients, fungal peritonitis (FP) is associated with serious complications, including technique failure and death. Only scarce data have been published regarding FP outcomes in modern cohorts in North America. In this study we evaluated the rates, characteristics and outcomes of FP in a major North American PD center.MethodsWe conducted a retrospective cohort study including all fungal peritonitis episodes among peritoneal dialysis patients followed in a large PD center between January 2000 and February 2013. Our pre-specified end-points included rates of FP, characteristics, outcomes and determinants of death.ResultsThirty-six episodes of FP were identified during the follow-up period (one episode per 671 patient-months), representing 4.5% of the total peritonitis events. Patients’ mean age and peritoneal dialysis vintage were 61.3 ± 15.5 and 2.9 (1.5 – 4.8) years, respectively. Of the 36 episodes of FP, seven (19%) resulted in death and 17 (47%) led to technique failure with permanent transfer to hemodialysis. Surprisingly, PD was eventually resumed in 33% of cases with a median delay of 15 weeks (interquartile range 8 – 23) between FP and catheter reinsertion. In a univariable analysis, a higher Charlson comorbidity index (Odds ratio [OR] 3.25 per unit increase, 95% confidence interval [CI] 1.23 – 8.58) and PD fluid white blood cell (WBC) count greater than 3,000/mm3at presentation (OR 6.56, 95% CI 1.05 – 40.95) predicted death.ConclusionWhile fungal peritonitis is still associated with a high frequency of death and technique failure, one-third of our patients eventually returned to PD. Patients with a high burden of comorbidities appear at higher risk of death. We postulate that the high mortality associated with FP is partially related to the severity of comorbidity among patients with F P, rather than the infection per se. Importantly, PD can be resumed in a significant proportion of cases.

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Increased peritoneal membrane transport is associated with decreased patient and technique survival for continuous peritoneal dialysis patients. The Canada-USA (CANUSA) Peritoneal Dialysis Study Group.

Journal of the American Society of Nephrology ◽

10.1681/asn.v971285 ◽

1998 ◽

Vol 9 (7) ◽

pp. 1285-1292 ◽

Cited By ~ 10

Author(s):

D N Churchill ◽

K E Thorpe ◽

K D Nolph ◽

P R Keshaviah ◽

D G Oreopoulos ◽

...

Keyword(s):

Peritoneal Dialysis ◽

Serum Albumin ◽

Membrane Transport ◽

Patient Survival ◽

Peritoneal Membrane ◽

Dialysis Patients ◽

Technique Survival ◽

Survival Probabilities ◽

The Mean ◽

Technique Failure

The objective of this study was to evaluate the association of peritoneal membrane transport with technique and patient survival. In the Canada-USA prospective cohort study of adequacy of continuous ambulatory peritoneal dialysis (CAPD), a peritoneal equilibrium test (PET) was performed approximately 1 mo after initiation of dialysis; patients were defined as high (H), high average (HA), low average (LA), and low (L) transporters. The Cox proportional hazards method evaluated the association of technique and patient survival with independent variables (demographic and clinical variables, nutrition, adequacy, and transport status). Among 606 patients evaluated by PET, there were 41 L, 192 LA, 280 HA, and 93 H. The 2-yr technique survival probabilities were 94, 76, 72, and 68% for L, LA, HA, and H, respectively (P = 0.04). The 2-yr patient survival probabilities were 91, 80, 72, and 71% for L, LA, HA, and H, respectively (P = 0.11). The 2-yr probabilities of both patient and technique survival were 86, 61, 52, and 48% for L, LA, HA, and H, respectively (P = 0.006). The relative risk of either technique failure or death, compared to L, was 2.54 for LA, 3.39 for HA, and 4.00 for H. The mean drain volumes (liters) in the PET were 2.53, 2.45, 2.33, and 2.16 for L, LA, HA, and H, respectively (P < 0.001). After 1 mo CAPD treatment, the mean 24-h drain volumes (liters) were 9.38, 8.93, 8.59, and 8.22 for L, LA, HA, and H, respectively (P < 0.001); the mean 24-h peritoneal albumin losses (g) were 3.1, 3.9, 4.3, and 5.6 for L, LA, HA, and H, respectively (P < 0.001). The mean serum albumin values (g/L) were 37.8, 36.2, 33.8, and 32.8 for L, LA, HA, and H, respectively (P < 0.001). Among CAPD patients, higher peritoneal transport is associated with increased risk of either technique failure or death. The decreased drain volume, increased albumin loss, and decreased serum albumin concentration suggest volume overload and malnutrition as mechanisms. Use of nocturnal cycling peritoneal dialysis should be considered in H and HA transporters.

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Utility of Peritoneal Scintigraphy in Peritoneal Dialysis Patients: One Center Experience

Kidney360 ◽

10.34067/kid.0000302020 ◽

2020 ◽

Vol 1 (5) ◽

pp. 354-358

Author(s):

R. Haridian Sosa Barrios ◽

María Eugenia Rioja Martín ◽

Víctor Burguera Vion ◽

Astrid Lucía Santos Carreño ◽

Milagros Fernández Lucas ◽

...

Keyword(s):

Peritoneal Dialysis ◽

Peritoneal Membrane ◽

Polycystic Kidney ◽

Dialysis Patients ◽

First Line ◽

Peritoneal Dialysate ◽

Other Substances ◽

Line Imaging ◽

Technique Failure ◽

Peritoneal Scintigraphy

BackgroundPeritoneal dialysis (PD) is the RRT of choice in 15% of patients with CKD and has multiple advantages over hemodialysis. PD leaks can prompt technique failure and dropout. Use of peritoneal scintigraphy (PS) for diagnosis of PD leaks has declined in favor of more complex and expensive tests. We analyzed the utility of PS for PD leak diagnosis in our center.MethodsWe retrospectively analyzed all PS done in our center from January 2000 until December 2018, inclusive, in all patients on PD with a suspected dialysate leak.ResultsA total of 39 PS procedures were done in 36 patients on PD in the study period. Of those, 81% were male and 11% had CKD due to polycystic kidney disease. During this period, 23 leaks were diagnosed, showing an incidence of 6% (three episodes per patient per year). In all cases with negative PS, other tests did not confirm a peritoneal dialysate leak.ConclusionsPS is a safe, inexpensive, reproducible, and highly effective diagnostic tool for peritoneal dialysate leaks that allows nephrologists to tailor or stop PD therapy if required. In our opinion, it should be the first-line imaging test to diagnose PD leaks with minimum exposure to radiation, contrast, or other substances that could irritate the peritoneal membrane. We believe PS should be considered as the initial test of choice to diagnose this PD complication as soon as possible, minimizing technique failure and dropout due to leaks.

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