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      Recovery of renal function in dialysis patients

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          Abstract

          Background

          Although recovery of renal functions in dialysis dependent patients is estimated to be greater than 1%, there are no indicators that actually suggest such revival of renal function. Residual renal function in dialysis patients is unreliable and seldom followed. Therefore renal recovery (RR) in dialysis dependent patients may remain unnoticed. We present a group of dialysis dependent patients who regained their renal functions. The aim of this project is to determine any indicators that may identify the recovery of renal functions in dialysis dependent patients.

          Methods

          All the discharges from the chronic dialysis facilities were identified. Among these discharges deaths, transplants, voluntary withdrawals and transfers either to another modality or another dialysis facility were excluded in order to isolate the patients with RR. The dialysis flow sheets and medical records of these patients were subsequently reviewed.

          Results

          Eight patients with a mean age of 53.8 ± 6.7 years (± SEM) were found to have RR. Dialysis was initiated due to uremic symptoms in 6 patients and fluid overload in the remaining two. The patients remained dialysis dependent for 11.1 ± 4.2 months. All these patients had good urine output and 7 had symptoms related to dialysis. Their mean pre-initiation creatinine and BUN levels were 5.21 ± 0.6 mg/dl and 72.12 ± 11.12 mg/dl, respectively. Upon discontinuation, they remained dialysis free for 19.75 ± 5.97 months. The mean creatinine and BUN levels after cessation of dialysis were 2.85 ± 0.57 mg/dl and 29.62 ± 5.26 mg/dl, respectively, while the mean creatinine clearance calculated by 24-hour urine collection was 29.75 ± 4.78 ml/min. One patient died due to HIV complications. One patient resumed dialysis after nine months. Remaining continue to enjoy a dialysis free life.

          Conclusion

          RR must be considered in patients with good urine output and unresolved acute renal failure. Dialysis intolerance may be an indicator of RR among such patients.

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          Most cited references15

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          Secondary oxalosis: a cause of delayed recovery of renal function in the setting of acute renal failure.

          Ahmed M Alkhunaizi, Franky Chan (1996)
          Oxalosis, or calcium oxalate deposition in the tissues, may develop in patients with inherited disorders of oxalate metabolism or can occur secondary to other diseases. In this study, a case of renal oxalosis probably secondary to excessive parenteral vitamin C administration in a patient with acute post-traumatic oliguric renal failure is reported. Oxalate deposits may have contributed to further worsening and delayed recovery of renal function. The elimination of the source of excess vitamin C and its presumed effect on oxalate production, together with enhanced removal of oxalate during aggressive dialysis, resulted in prompt recovery of renal function. Secondary oxalosis represents a possible cause of delayed recovery of renal function in patients with acute renal failure who are receiving vitamin C supplementation if excess dosage of that supplementation is given. Vitamin C supplementation, if utilized, should be carefully monitored in patients receiving artificial renal replacement therapy.
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            Recoverability of renal function after relief of acute complete ureteral obstruction: clinical prospective study of the role of renal resistive index.

            Ahmed-Abdalla El-Tantawy, Essam A Abubieh, Waleed Eassa … (2002)
            To study the values of the renal resistive index (RI) before and at different points after relief of obstructive anuria and to correlate these values with the corresponding values of serum creatinine and with the recovery of renal function after release of obstruction. A total of 32 consecutive patients with obstructive anuria were prospectively evaluated by measurement of RI before drainage and at 3 days, 1 week, 2 weeks, and 4 weeks after drainage. Serum creatinine was measured at all points of the RI examination. Moreover, RI was measured in an age and sex-matched control group of 24 consecutive healthy donors and volunteers. The study included 40 obstructed and 48 normal kidneys. In the obstructed kidneys, the mean RI values decreased significantly from 0.78 +/- 0.05 before drainage to 0.70 +/- 0.09 at 3 days after drainage (P <0.001) with an additional significant reduction to 0.68 +/- 0.08 at 7 days after drainage (P <0.01) and stabilized thereafter. Serum creatinine decreased significantly from 8.4 +/- 4.4 mg/dL before drainage to 4.7 +/- 3.8 mg/dL 3 days after drainage (P <0.001) and then to 3.6 +/- 3.7 mg/dL 7 days after drainage (P <0.001) and stabilized thereafter. The correlation between the RI and serum creatinine at the overall points of measurement was good. Obstructed kidneys were classified into two groups according to the recovery of renal function after obstruction relief: those that showed significant improvement of serum creatinine (24 kidneys, group 1) and those with no significant improvement of serum creatinine (16 kidneys, group 2). In group 1, the difference between the mean RI values before and after drainage was statistically significant (0.78 +/- 0.05 versus 0.64 +/- 0.06, P <0.001); in group 2, the difference between the before and after drainage RI values was not significant (0.781 +/- 0.040 versus 0.779 +/- 0.039). The mean RI of the normal kidneys was 0.66 +/- 0.04. A comparison between the mean RI values of the control group and the mean RI values of the obstructed patients after drainage showed no significant difference in group 1; markedly higher values were noted in group 2 at all points after drainage. In the setting of acute complete renal obstruction, the RI has a good positive correlation with serum creatinine. Recovery of renal function could not be predicted from the changes in RI before obstruction release. However, a reversal of a previously elevated RI could be used as an early indicator that renal function recovery is likely.
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              Recovery of renal function in Black South African patients with malignant hypertension: superiority of continuous ambulatory peritoneal dialysis over hemodialysis.

              I Katz, L Sofianou, Marcus Butler … (2016)
              To describe recovery of renal function (RC) in Black South African patients with primary malignant hypertension (MHT) and end-stage renal failure, according to the type of dialysis provided. A retrospective analysis of the records of 31 patients with MHT. A university-based, large tertiary-care hospital and its community-based satellite continuous ambulatory peritoneal dialysis (CAPD) clinics. Only patients with renal failure caused by MHT and who were on dialysis between January 1997 and June 2000. There were 11 patients on peritoneal dialysis (PD) that regained renal function; 11 patients on hemodialysis (HD), none of whom recovered renal function; and 9 patients on PD who did not recover renal function during the same time period. The groups were investigated for variables that might predict RC. Peritoneal dialysis compared with HD was highly significant as an indicator of RC (p < 0.0001), with 60% of patients on PD regaining renal function, versus 0% on HD. Median time to recovery was 300 (150 -365) days. There was no significant difference in decline of mean arterial pressure (MAP) between the groups; MAP declined significantly in all groups (p = 0.00002). All groups received similar drug therapy. In the RC group, initial MAP, kidney size, and urine output tended to be higher and creatinine lower (p = not significant). Dialysis adequacy was similar in the different groups. This retrospective study suggests there may be benefit from PD as the primary form of dialysis when patients have MHT as a cause of their renal failure. Possible predictors of RC include blood pressure control, initial MAP, initial serum creatinine, initial urine output, and kidney size. Time should be allowed for RC before transplantation is undertaken. Prospective studies are needed to confirm the benefit of CAPD in patients with MHT.
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                Author and article information

                Journal
                Journal ID (nlm-ta): BMC Nephrol
                Title: BMC Nephrology
                Publisher: BioMed Central (London )
                ISSN (Electronic): 1471-2369
                Publication date Collection: 2003
                Publication date (Electronic): 16 October 2003
                Volume: 4
                Page: 9
                Affiliations
                [1 ]Department of Medicine, Nephrology Division, University of Texas Medical Branch, Galveston, TX, USA
                Article
                Publisher ID: 1471-2369-4-9
                DOI: 10.1186/1471-2369-4-9
                PMC ID: 270015
                PubMed ID: 14563216
                SO-VID: be881d98-df16-4ba1-97b5-cd4ecb3b6f67
                Copyright © Copyright © 2003 Agraharkar et al; licensee BioMed Central Ltd. This is an Open Access article: verbatim copying and redistribution of this article are permitted in all media for any purpose, provided this notice is preserved along with the article's original URL.
                History
                Date received : 30 May 2003
                Date accepted : 16 October 2003
                Categories
                Subject: Research Article

                ScienceOpen disciplines: Nephrology
                Keywords: residual renal function,recovery of renal functions,dialysis dependence,cessation of dialysis
                Data availability:
                ScienceOpen disciplines: Nephrology
                Keywords: residual renal function, recovery of renal functions, dialysis dependence, cessation of dialysis

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