Nephrologie & Therapeutique最新文献

Background: Sarcopenia is associated with significant morbidity and mortality in patients undergoing peritoneal dialysis (PD). Three different tools must be applied to measure the three indices for diagnosing sarcopenia. Considering the cumbersome diagnostic steps and multi-layered mechanisms underlying sarcopenia, we combined new biomarker with bioelectrical impedance analysis (BIA) data to predict PD sarcopenia.

Methods: Patients underwent regular PD were asked to complete sarcopenia screening, including appendicular skeletal muscle mass, handgrip strength, and the 5-time chair stand time test according to the newly revised diagnosis consensus of Asian Working Group for Sarcopenia (AWGS2019). Serum was collected for centralized detection of the irisin levels. BIA data, especially the phase angle (PhA), as well as patient's general clinical information, dialysis related indices, laboratory data and body composition data were recorded.

Results: Among 105 enrolled PD patients (41.0% men, mean age 54.2 ± 8.89 years), the sarcopenia prevalence was 31.4% and the sarcopenic obesity was 8.6%. Binary regression analysis showed that serum irisin concentrations (OR = 0.98; 95% CI,0.97-0.99; p = 0.002), PhA (OR = 0.43; 95% CI, 0.21-0.90; p = 0.025) and body mass index (BMI) (OR = 0.64; 95% CI, 0.49-0.83; p = 0.001) were independently associated with PD sarcopenia. The AUC of the combination use of serum irisin concentrations and PhA for predicting PD sarcopenia was 0.925 with a sensitivity of 100% and specificity of 84.0% in male and was 0.880 with a sensitivity of 92.0% and specificity of 81.5% in female. PD sarcopenia score=1533.48+-0.75*Handgrip strength+4.63*BMI+-18.07*Total body water +-11.87*Extra-cellular water / total body water +9.26*Fat free mass index+-83.41*PhA+22.42*Albumin/Globulin+-26.38*blood phosphorus+-17.04*Total cholesterol+-29.02*Triglyceride+-0.29*Prealbumin+-0.17*Irisin.

Conclusions: Sarcopenia is relatively common among PD patients. The combination of serum irisin concentrations and PhA facilitated the rapid prediction of PD sarcopenia and could serve as an optimal screening tool for PD sarcopenia in clinical settings.

Introduction: Kidney transplantation (KT) restores the fertility of women with end-stage kidney disease (ESKD), thus offering them the possibility of having children. However, pregnancy after kidney transplantation is associated with high maternal-fetal morbidity. The purpose of this work is to report the experience of our service in pregnancies in kidney transplant recipients.

Materials and methods: We retrospectively studied the records of transplant recipients who had one or more pregnancies after KT. We analyzed clinical (blood pressure, weight gain, oedema, duration of pregnancy, obstetric complication) and biological (creatinine, urinary albumin excretion) parameters.

Results: Between 1998 and 2020, twenty-one pregnancies occurred in 12 transplant recipients. The average age of patients at the time of conception was 29 ± 5 years with a delay between KT and pregnancy of 43 ± 29 months. Seven pregnancies began with arterial hypertension (HTA) controlled under treatment, proteinuria before conception was negative in all pregnancies and renal function was normal with an average creatinine level of 10.1 ± 1,27 mg/L. Prior to pregnancy, immunosuppression regimens were based on anticalcineurin (n = 21) combined either with mycophenolate mofetil (MMF) (n = 10) or azathioprine (n = 8) or alone (n = 3). Immunosuppression regimens were all associated with corticosteroid therapy. Three months before conception, MMF was relayed by azathioprine in seven pregnancies, on the other hand three other unplanned pregnancies, started under MMF. During pregnancy, the appearance of proteinuria greater than 0,5 g/24 h was noted in three pregnancies in the third trimester. Pregnancy hypertension was found in three pregnancies, one of which progressed to pre-eclampsia. As for renal function, it remained stable with an average creatinine level of 10,3 mg/l in the 3rd trimester. Two cases of acute pyelonephritis were noted. No episode of acute rejection was noted during and 3 months after pregnancy. The delivery was performed by caesarean section in 44.4 %, after an average term of 37 week of amenorrhea ± 2.04 with three cases of prematurity. The average birth weight was 3 110 g ± 450 g. There was one case of spontaneous abortion and two cases of fetal death in utero. After post-partum, renal function remained stable in five patients. In six cases, there was impaired renal function either by acute rejection or secondary to chronic allograft nephropathy.

Conclusion: In our department, a quarter of transplant recipients were able to carry a pregnancy with a rate of 89 % of successful pregnancies. Pregnancy after KT requires special planning and monitoring. A multidisciplinary collaboration between transplant nephrologist, gynecologist and pediatrician is necessary by referring to the recommendations.

Glomerular filtration rate (GFR) is estimated from equations based on serum or plasma concentrations of endogenous markers (creatinine and/or cystatin C), and demographic data (age, sex, ± ethnicity). These equations are accurate at the population level, but often inaccurate at the individual level. The creatinine-based Chronic Kidney Disease-Epidemiology Collaboration (CKD-EPI) equation published in 2009 (CKD-EPIcr-2009), and the CKD-EPI equation published in 2012 based on creatinine and cystatin C, were recalibrated in 2021 to remove their dedicated race correction factors for black American subjects. All creatinine-based CKD-EPI equations overestimate true GFR in subjects younger than 30 years. The Full Age Spectrum (FAS) equation, applicable across the entire age spectrum (pediatrics to old age), solved this problem, but remained suboptimal at low GFR values. The European Kidney Function Consortium (EKFC) equation published in 2021 was an improvement of the FAS equation, which also includes the Q factor (median creatinine in the general population). EKFC is applicable across the age spectrum and is efficient at low and normal GFR values. The new creatinine-based CKD-EPI equation (CKD-EPIcr-2021) underestimates GFR in Black Americans and overestimates it in non-Black Americans. In European and African subjects, CKD-EPIcr-2021 overestimates true GFR and should not be adopted. The EKFC equation, which performs well in this population, also performs well in European Black subjects and in African subjects, provided dedicated Q factors are used.

The recommended equation to estimate the value of glomerular filtration rate (eGFR) among children is Schwartz equation updated in 2009. However, it is few frequently used because involves height, a factor rarely documented for laboratories, especially hospital laboratories. The FAS (Full Aged Spectrum) formula developed by a European group, allows to get away from this factor. We compared CKD-EPI (Chronic Kidney Disease-EPIdemiology collaboration) and FAS formulas to Schwartz equation to estimate GFR in children. We realized a retrospective study included 1.668 children between 2 and 14 years old, whose serum creatinine had been measured during their hospitalization stay. We showed that FAS formula is correlated to Schwartz (r = 0.88), with a mean underestimation of eGFR at 6.2% versus CKD-EPI which has a correlation coefficient equal to 0.45 and overestimates eGFR to approximatively 42.0% compared to Schwartz formula. Furthermore, concordance at 30% is 99% with FAS whereas it’s only 35% with CKD-EPI. Thus, we recommend using the FAS formula to estimate GFR in children between 2 and 14 years old when their height is not available.

Introduction: Initiation of emergency dialysis is a critical situation responsible for high morbidity and mortality. This study describes the characteristics of emergency hemodialysis patients in a hospital in Madagascar.

Patients and methods: It is a descriptive study over a period of 7 months, from September 1, 2018 to March 31, 2019, on emergency hemodialysis patients in the hemodialysis department of the University Hospital of Joseph Raseta Befelatanana, Antananarivo. Emergency hemodialysis was defined as dialysis performed immediately or within the first 48 hours of hospitalisation in a life-threatening situation.

Results: Among 124 haemodialysis patients, 52 patients (41.93%) had started dialysis as an emergency. The mean age of patients was 50.5 years and the sex ratio (male/female) was 1.08. Hypertension (51.92%) and diabetes (34.61%) were the main comorbidities. Chronic kidney disease was found in 82.7%. The majority of patients were unprepared and had initiated dialysis with a central venous catheter. The most frequent indication was Kussmaul's breathing (32.6%) followed by anuria (28.84%). The mortality rate was 23.08% and the prognosis was influenced by their condition on arrival.

Conclusion: The predominance of chronic kidney disease and the absence of a permanent vascular approach can be explained by the late referral to nephrologists of patients with chronic kidney disease. Efforts need to be made to increase the proportion of scheduled dialysis patients with a permanent approach.

The 2022-2026 Transplantation Plan has been launched by the French government to stimulate the activities of organ harvesting and transplantation, after the failure of the previous one. It has been designed by the Biomedicine Agency in collaboration with learning societies, including the SFNDT, and patient associations. The plan is original in its objectives, its regional organization with its driving by the Regional Health Agencies, the involvement of advanced practice nurses and its funding. The ambition is to transplant every transplantable patient. The increase in the number of kidney transplantations, more of all from a living donor, requires the active participation of all the nephrologists, who are the first in delivering information to the patients and their family on advanced chronic kidney disease treatment and living donation.

Introduction: Chronic kidney disease stage V, by its incidence and its prevalence which are constantly increasing in the world and in Algeria, the morbidity and mortality it generates, the high cost of its treatment, represents a major public health issue. Our objective is to describe the epidemiology of stage V chronic kidney disease treated in south-eastern Algeria.

Patients and methods: In our regional, multicenter, prospective descriptive study, all patients with stage V chronic kidney disease, residing and treated in south-eastern Algeria between September 1, 2016, and December 31, 2017, were included and followed up until December 31, 2018.

Results: Stage V chronic kidney disease is a frequent pathology in the region: 1934 patients were included. It mainly affects young people: the average age of patients was 50.17 ± 16.98 years, with a male predominance of 59.10%. High blood pressure and diabetes are the two main causes. The start of dialysis on a temporary catheter represents 81.5% of cases, the initial management requires emergency dialysis in 91.2% of cases. In total, 97.1% of chronic hemodialysis patients use an arteriovenous fistula as a permanent vascular access.

Conclusion: Our study population is younger than that of developed countries and has fewer comorbidities and disabilities but lower survival and high mortality. The developing national chronic kidney disease stage V registry is becoming an absolute necessity. It will allow to have a better knowledge of its epidemiology and the needs of its care in each region. It can contribute to improving the prevention and management of this disease.

Preserving the environment is becoming a universal priority. Human activities must be redesigned to best adapt them to available resources and to reduce their deleterious impact on the planet. The Green Nephrology Group of the “Société française de néphrologie, dialyse et transplantation” (SFNDT) has started a reflection on these issues, in particular on dialysis, a vital treatment but with high carbon production, associated with high water consumption. The data available on these points are presented such as, among others, the collection of indicators and action plans, the recycling of waste from water treatment, the reduction of dialysate flow, the reuse and regeneration of spent dialysate as well as calculations of carbon emission by dialysis activity. Architectural experiences are reported as well as the regulatory constraints applying to manufacturers and organizations in the sector. Potential solutions require the mobilization of all stakeholders, ranging from patients to health authorities, including caregivers, pharmacists, technicians, nephrologists and facility managers. They will be formalized very soon in a guide being prepared by the SFNDT Green Nephrology Group.