Early diagnosis of chronic kidney disease in patients with diabetes in France: multidisciplinary expert opinion, prevention value and practical recommendations.

Diabetes is the leading cause of end-stage kidney disease (ESKD), accounting for approximately 50% of patients starting dialysis. However, the management of these patients at the stage of chronic kidney disease (CKD) remains poor, with fragmented care pathways among healthcare professionals (HCPs). Diagnosis of CKD and most of its complications is based on laboratory evidence. This article provides an overview of critical laboratory evidence of CKD and their limitations, such as estimated glomerular filtration rate (eGFR), urine albumin-to-creatinine ratio (UACR), Kidney Failure Risk Equation (KFRE), and serum potassium. eGFR is estimated using the CKD-EPI 2009 formula, more relevant in Europe, from the calibrated dosage of plasma creatinine. The estimation formula and the diagnostic thresholds have been the subject of recent controversies. Recent guidelines emphasized the combined equation using both creatinine and cystatin for improved estimation of GFR. UACR on a spot urine sample is a simple method that replaces the collection of 24-hour urine. Albuminuria is the preferred test because of increased sensitivity but proteinuria may be appropriate in some settings as an alternative or in addition to albuminuria testing. KFRE is a new tool to estimate the risk of progression to ESKD. This score is now well validated and may improve the nephrology referral strategy. Plasma or serum potassium is an important parameter to monitor in patients with CKD, especially those on renin-angiotensin-aldosterone system (RAAS) inhibitors or diuretics. Pre-analytical conditions are essential to exclude factitious hyperkalemia. The current concept is to correct hyperkalemia using pharmacological approaches, resins or diuretics to be able to maintain RAAS blockers at the recommended dose and discontinue them at last resort. This paper also suggests expert recommendations to optimize the healthcare pathway and the roles and interactions of the HCPs involved in managing CKD in patients with diabetes.

[Measurement of glomerular filtration rate using a reference method]. / Mesure du débit de filtration glomérulaire par méthode de référence.

Direct measurement methods of glomerular filtration rate (GFR) are considered as the gold standard to assess kidney function. Following the withdrawal of the Proinuline Serb® specialty by the French National Health Surveillance Agency, iohexol remains the most suitable marker to replace inulin as the marker for GFR in France. The assay is performed by high performance liquid chromatography (HPLC) coupled with ultraviolet (UV) detection or by mass spectrometry. Plasma clearance measurement is the protocol of choice: single-sample protocols dominate, but multiple-sample protocols may be more accurate in specific situations to improve accuracy. In some cases, urinary clearance protocols may be proposed. National and international recommendations suggest using a GFR measurement as a confirmatory test in cases where the creatinine-based estimated GFR is inappropriate, ie clinical situations characterized by a significant alteration of muscle mass or volume distribution. The indications retained by the working group were graded according to the level of recommendations. The essential indications are the evaluation of living kidney donor, the monitoring of kidney allograft function at one year post-transplantation, drugs with narrow therapeutic range (anticoagulant, chemotherapy) in patients with inadequate estimation of GFR by creatinine and clinical research.

Community pharmacist intervention in patients with renal impairment.

BACKGROUND: In France, community pharmacists do not have free access to patients' lab results, and it is therefore impossible for them to identify patients with renal impairment. OBJECTIVE: (1) to evaluate the ability of community pharmacists (CPs) to identify drug related problems (DRP) in patients at risk for or suffering from renal impairment; (2) to evaluate the proportions of recommendations by CPs that lead to a modification by GP. SETTING: A prospective and observational study involving 24 community pharmacists in France. METHODS: Following special training, community pharmacists were asked to select 52 patients with the following characteristics: ≥65 years of age; prescribed at least two diabetic and/or antihypertensive drugs. Serum creatinine value was obtained for each patient and glomerular filtration rate estimated (eGFR) with the aMDRD formula. Those with a eGFR 60 ml/min/1.73 m² were considered having chronic kidney disease (CKD). Data was collected concerning whether the community pharmacists identified drug related problems and tried to inform the GP who prescribed the medications. Identified DRP were reviewed by a team of nephrologists and hospital clinical pharmacists. PRIMARY OUTCOME: The proportion of CKD patients and those without serum creatinine monitoring, the number of drug related problems identified by community pharmacists, and the proportion of drug related problems resolved by the community pharmacists intervention to the GP. RESULTS: Of the total 791 patients identified, 180 (22.8 %) exhibited CKD, and 57 (7.2 %) had not undergone serum creatinine monitoring. Among the 1297 drugs prescribed, 260 had to be adapted to eGFR. The proportion of DRP was 21.5 % (56/260), of which 40 % (20) were identified by community pharmacists. Once the GP was informed, 33.3 % (6/18) of DRP were resolved. CONCLUSION: Community pharmacists identified 40 % of DRP related to CKD prescriptions, leading to prescription modification by GPs in a third of the cases. These interventions are likely to decrease drug-related morbidity and mortality.