Novel Perspectives in Chronic Kidney Disease-Specific Cardiovascular Disease.

Chronic kidney disease (CKD) affects > 10% of the global adult population and significantly increases the risk of cardiovascular disease (CVD), which remains the leading cause of death in this population. The development and progression of CVD-compared to the general population-is premature and accelerated, manifesting as coronary artery disease, heart failure, arrhythmias, and sudden cardiac death. CKD and CV disease combine to cause multimorbid cardiorenal syndrome (CRS) due to contributions from shared risk factors, including systolic hypertension, diabetes mellitus, obesity, and dyslipidemia. Additional neurohormonal activation, innate immunity, and inflammation contribute to progressive cardiac and renal deterioration, reflecting the strong bidirectional interaction between these organ systems. A shared molecular pathophysiology-including inflammation, oxidative stress, senescence, and hemodynamic fluctuations characterise all types of CRS. This review highlights the evolving paradigm and recent advances in our understanding of the molecular biology of CRS, outlining the potential for disease-specific therapies and biomarker disease detection.

Dietary Patterns, Dietary Adequacy and Nutrient Intake in Adults Commencing Peritoneal Dialysis: Outcomes from a Longitudinal Cohort Study.

(1) Background: Optimal dietary intake is integral to good health in people receiving peritoneal dialysis (PD). We investigated how dietary patterns, dietary adequacy and nutrient intake may change over time in people commencing PD. (2) Methods: Participants were attending the PD training unit for the commencement of peritoneal dialysis, aged ≥18 years and willing to complete food records. Misreporters were excluded from the analysis. Dietary intake was compared at PD commencement and at 12 months. Intake was also compared to reference standards. Dietary patterns were derived using principal component analysis. (3) Results: There were no significant changes between baseline and 12 months for grains, fruit, vegetables and meat. Dairy and added sugar intake was significantly lower (p = 0.01). The intake of energy and protein was adequate and did not change. There was a significant reduction in dietary phosphorus and calcium, and increased vitamin C intake. Three dietary patterns were identified: the 'Bread and Cereal' pattern; 'Milk and Potatoes' pattern; and the 'Semi Vegetarian' pattern. (4) Conclusions: In this longitudinal cohort study, the diet quality was suboptimal and there were limited changes in intake after the commencement of PD. Further exploration of how dietary patterns may impact outcomes and quality of life is warranted.

Efficacy of beetroot juice on reducing blood pressure in hypertensive adults with autosomal dominant polycystic kidney disease (BEET-PKD): study protocol for a double-blind, randomised, placebo-controlled trial.

BACKGROUND: In autosomal dominant polycystic kidney disease (ADPKD) impaired nitric oxide (NO) synthesis, in part, contributes to early-onset hypertension. Beetroot juice (BRJ) reduces blood pressure (BP) by increasing NO-mediated vasodilation. The aim of this double-blind, randomised, placebo-controlled study is to test the hypothesis that BRJ reduces systolic and diastolic clinic BP in hypertensive adults with ADPKD. METHODS: Participants with ADPKD and treated hypertension (n = 60) will be randomly allocated (1:1) to receive a daily dose of either nitrate-replete (400 mg nitrate/day) or nitrate-deplete BRJ for 4 weeks. The co-primary outcomes are change in mean systolic and diastolic clinic BP before and after 4 weeks of treatment with daily BRJ. Secondary outcomes are changes in daily home BP, urinary albumin to creatinine ratio, serum and salivary nitrate/nitrite levels and serum asymmetric dimethylarginine levels before and after 4 weeks of BRJ. DISCUSSION: The effect of BRJ in ADPKD has not been previously tested. BRJ is an accessible, natural dietary supplement that, if effective, will provide a novel adjunctive approach for treating hypertension in ADPKD. TRIAL REGISTRATION: ClinicalTrials.gov NCT05401409. Retrospectively registered on 27th May 2022.

Psychosocial factors in patients with kidney failure and role for social worker: A secondary data audit.

BACKGROUND: People with kidney failure face a multitude of psychosocial stressors that affect disease trajectory and health outcomes. OBJECTIVES: To investigate psychosocial factors affecting people with kidney failure before or at start of kidney replacement therapy (KRT) and kidney supportive and palliative care (KSPC) phases of illness and to explore role of social worker during the illness trajectory. METHODS: We conducted a secondary data audit of patients either before or at start of KRT (Phase 1) and at the KSPC (Phase 2) of illness and had psychosocial assessments between March 2012 and March 2020 in an Australian setting. RESULTS: Seventy-nine individuals, aged 70 ± 12 years, had at least two psychosocial assessments, one in each of the two phases of illness. The median time between social worker evaluations in Phase 1 and Phase 2 was 522 (116-943) days. Adjustment to illness and treatment (90%) was the most prevalent psychosocial issue identified in Phase 1, which declined to 39% in Phase 2. Need for aged care assistance (7.6%-63%; p < 0.001) and carer support (7.6%-42%; p < 0.001) increased significantly from Phase 1 to Phase 2. There was a significant increase in psychosocial interventions by the social worker in Phase 2, including supportive counselling (53%-73%; p < 0.05), provision of education and information (43%-65%; p < 0.01), and referrals (28%-62%; p < 0.01). CONCLUSION: Adults nearing or at the start of KRT experience immense psychosocial burden and adaptive demands that recognisably change during the course of illness. The positive role played by the nephrology social worker warrants further investigation.

Changing the peritoneal dialysis access algorithm with a precise technique of percutaneous Seldinger PD catheter placement.

BACKGROUND: In 1953, Swedish radiologist Sven Seldinger introduced a technique for blood vessel or hollow organ access using a needle, guide wire and catheter. Over the last two decades, this technique has been used for Peritoneal Dialysis (PD) catheter placement, "Seldinger PD" (SPD). To improve the safety and accuracy of SPD, ultrasound, X-ray guidance, contrast imaging and micropuncture techniques have been incorporated to a greater or lesser extent. METHODS: This manuscript describes a new and rigorous technique of SPD developed at our unit and results in the first 64 cases. One of our goals was to replace emergency Central Vein Catheter Hemodialysis with "Urgent-Start" PD. We therefore sought to develop a procedure that was ultra-safe, minimally invasive and readily done on the sickest patients under Local Anesthetic. As the technique was new to our unit, and because of progressive modifications of the technique, some of the results reflect our "learning curve." In addition, 55% of the patients referred to our program had "crashed" into renal failure, 32% were deemed "unfit for General Anaesthesia" by the Anaesthetists and 53% were moderately to severely obese, resulting in a very morbid and vulnerable cohort. RESULTS: Despite this, we had no procedure related mortality, no organ injury and no significant bleeding. Technical success was 97% (intention-to-treat). Urgent Start PD was used in 36%; overall, 3/61 catheters placed experienced PD fluid leak. Correct catheter tip placement - in the Pelvic Pouch - was documented in all cases; significant catheter migration was seen in 18% of those with imaging follow-up, only two requiring revision. Most catheter migrations occurred early in our series before our low peritoneal puncture technique became standard. CONCLUSIONS: We believe this SPD technique is safe, precise, clinically and financially cost-effective and can replace other forms of PD placement in most situations.

Progress in preeclampsia: the contribution of animal models.

Recent advances have been made in understanding the nature of placental dysfunction causing preeclampsia, and other hypertensive disorders of pregnancy. The contribution of animal studies in the understanding of the effects of inadequate placentation on blood pressure and other target organs will be explored in this review. This will include technical aspects of animal studies in pregnancy, as well as the translation of data regarding newly discovered pathological pathways, in particular the angiogenic pathway, into targets in clinical practice.

Psychosocial factors affecting patients with end-stage kidney disease and the impact of the social worker.

BACKGROUND: End-stage kidney disease (ESKD) incidence has been increasing over time, contributing significantly to morbidity and mortality. However, there is limited data examining the psychosocial factors affecting people with ESKD and how the social worker fits within the multidisciplinary CKD care. This integrative systematic review aims to summarise the existing evidence on psychosocial determinants of outcomes in ESKD and the role of the social worker in nephrology care. METHOD: The literature search was conducted using PubMed and MEDLINE, targeting articles published from database inception until May 2021. This systematic review was performed in compliance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. The Joanna Briggs Institute tools were employed to assess the quality of included studies. RESULTS: Of the 397 citations, 13 studies applicable to 1465 patients met the inclusion criteria. The studies were of cross-sectional, experimental, and exploratory qualitative design in nature. The findings of the studies were summarised into three major themes-psychosocial factors, role of the renal social worker, and impact of the renal social worker. The studies demonstrated that concerns related to adjustment, death and dying, family and social functioning, and loss were common amongst participants of the included studies indicating the need for a social worker. Three studies explored the impact of social workers in ESKD, revealing that people who received support from social workers had an improved quality of life, lower depression scores, and reduced hospitalisations and emergency room visits. CONCLUSION: This review summarizes the multitude of physical and psychological stressors that patients with ESRD face, and highlights the positive role social workers can play in improving the psychosocial stressors in this patient group, and the need for large-scale randomised trials to understand the role of social workers as part of a multidisciplinary nephrology care.

Long-term dietary nitrate supplementation does not reduce renal cyst growth in experimental autosomal dominant polycystic kidney disease.

Augmentation of endogenous nitric oxide (NO) synthesis, either by the classical L-arginine-NO synthase pathway, or the recently discovered entero-salivary nitrate-nitrite-NO system, may slow the progression of autosomal dominant polycystic kidney disease (ADPKD). To test this hypothesis, the expression of NO in human ADPKD cell lines (WT 9-7, WT 9-12), and the effect of L-arginine on an in vitro model of three-dimensional cyst growth using MDCK cells, was examined. In addition, groups of homozygous Pkd1RC/RC mice (a hypomorphic genetic ortholog of ADPKD) received either low, moderate or high dose sodium nitrate (0.1, 1 or 10 mmol/kg/day), or sodium chloride (vehicle; 10 mmol/kg/day), supplemented drinking water from postnatal month 1 to 9 (n = 12 per group). In vitro, intracellular NO, as assessed by DAF-2/DA fluorescence, was reduced by >70% in human ADPKD cell lines, and L-arginine and the NO donor, sodium nitroprusside, both attenuated in vitro cyst growth by up to 18%. In contrast, in Pkd1RC/RC mice, sodium nitrate supplementation increased serum nitrate/nitrite levels by ~25-fold in the high dose group (P<0.001), but kidney enlargement and percentage cyst area was not altered, regardless of dose. In conclusion, L-arginine has mild direct efficacy on reducing renal cyst growth in vitro, whereas long-term sodium nitrate supplementation was ineffective in vivo. These data suggest that the bioconversion of dietary nitrate to NO by the entero-salivary pathway may not be sufficient to influence the progression of renal cyst growth in ADPKD.

Galectin-1-Related Modulation of Trophoblast Endothelial Interactions by Integrins α1 and ß1.

During normal trophoblast invasion, integrins α6ß4 are downregulated, and α1ß1 are upregulated in invasive cytotrophoblast cells. In preeclampsia both interstitial and endovascular invasion are shallow and cytotrophoblasts fail to upregulate α1ß1 and downregulate α6ß4. This study aims to investigate the role of integrins α1ß1 and α6ß4 on cellular pathways influencing trophoblast integration into endothelial cellular networks in vitro. Red fluorescent-labeled human uterine myometrial microvascular endothelial cells (UtMVECs) were seeded on Matrigel to form endothelial networks. Green fluorescent-labeled trophoblastic HTR-8/SVneo cells pre-incubated with 20 µg/ml of neutralizing antibodies (anti-α1, ß1, α6, ß4, α1 + ß1, or α6 + ß4) for 1 h were then co-cultured with endothelial networks with the neutralizing antibodies for 24 h. Fluorescent images were captured, and quantified utilizing Image J. Cells were retrieved to analyze mRNA expression of galectin-1, TIMP-1, and PAI-1 by quantitative PCR. MMP-2, MMP-9, free sFlt-1, and PlGF from conditioned media were measured by ELISA. The integration of trophoblast cells into endothelial cellular networks was inhibited by anti-ß1(- 28 ± 3%, p < 0.0001), and increased by anti-α6(+ 19 ± 5%, p < 0.01). Galectin-1 mRNA expression was decreased by anti-α1(- 35 ± 7%, p < 0.001), anti-ß1(- 23 ± 5%, p < 0.05), and anti-α1+ß1(- 35 ± 5%, p < 0.001). The mRNA expression of TIMP-1 was inhibited by anti-α1(- 59 ± 9%, p < 0.01) and anti-ß1(- 63 ± 7%, p < 0.001) while PAI-1 mRNA expression was increased by anti-α1 + ß1(+ 285 ± 70%, p < 0.0001). In the conditioned medium, anti-α1 reduced MMP-2(-28 ± 1%, p < 0.001), MMP-9(-27 ± 8%, p < 0.01), and sFlt-1(-27 ± 5%, p < 0.001) production. Anti-ß1 reduced MMP-2(- 15 ± 2%, p < 0.05) production. There were no changes in PlGF. Appropriate integrins α1ß1 modulate trophoblast cell integration into endothelial cellular networks in vitro through invasive pathways including galectin-1, TIMP-1, PAI-1, MMP-2, and MMP-9 production.

Effect of placental growth factor in models of experimental pre-eclampsia and trophoblast invasion.

Placental growth factor (PlGF) is decreased in early gestation of pregnant women who subsequently develop pre-eclampsia. In this study, pre-emptive treatment with PlGF to prevent pre-eclampsia was evaluated in an in vivo rodent model of experimental pre-eclampsia (EPE) induced by TNF-α and in an in vitro model of human first-trimester trophoblast invasion. Pregnant C57/BL6 mice were treated with recombinant mouse placental growth factor-2 (rmPlGF-2) 100 µg/kg/day IP from gestational day (gd) 10. Animals had EPE induced by continuous TNF-α infusion on gd 13 and were subject to either continuous blood pressure monitoring by radiotelemetry throughout pregnancy or live placenta T2 -weighted magnetic resonance imaging (MRI) to demonstrate placental function on gd 17. There was no difference in BP (P > .99), proteinuria (P = .9) or T2 values on MRI (P = .9) between control and rmPlGF-2-treated animals. On gd 13, animals treated with rmPlGF-2 demonstrated increased placenta PlGF (P = .01) and Toll-like receptor-3 (P = .03) mRNA expression as compared with controls. Fluorescent-labelled human uterine microvascular endothelial cells and HTR8/SVNeo cells were co-cultured on Matrigel™ and treated with recombinant human PlGF (rhPlGF) (10 ng/mL) and/or TNF-α (0.5 ng/mL). Trophoblast integration into endothelial networks was reduced by added TNF-α (P = .006), as was rhPlGF concentration in conditioned media (P < .0001). Cell integration was not ameliorated by addition of rhPlGF (P > .9). Although TNF-α-induced EPE was not reversed with pre-emptive rmPlGF-2, a further trial of pre-emptive rhPlGF in vivo is required to determine whether the absence of effect of rhPlGF demonstrated in vitro precludes PlGF as a preventative therapy for pre-eclampsia.

A pharmacokinetic assessment of optimal dosing, preparation, and chronotherapy of aspirin in pregnancy.

BACKGROUND: The benefit of aspirin in preventing preeclampsia is well established; however, studies over the years have demonstrated variability in outcomes with its use. Potential contributing factors to this variation in efficacy include dosing, time of dosing, and preparation of aspirin. OBJECTIVE: We aimed to compare the difference in pharmacokinetics of aspirin, through its major active metabolite, salicylic acid, in pregnant women and nonpregnant women, and to examine the effect of dose (100 mg vs 150 mg), preparation (enteric coated vs non-enteric-coated), and chronotherapy of aspirin (morning vs evening) between the 2 groups. MATERIALS AND METHODS: Twelve high-risk pregnant women and 3 nonpregnant women were enrolled in this study. Pregnant women were in 1 of 4 groups (100 mg enteric coated, 100 mg non-enteric-coated, 150 mg non-enteric-coated morning dosing, and 150 mg non-enteric-coated evening dosing), whereas nonpregnant women undertook each of the 4 dosing schedules with at least a 30-day washout period. Blood samples were collected at baseline (before ingestion) and at 1, 2, 4, 6, 12, and 24 hours after ingestion of aspirin. Plasma obtained was analyzed for salicylic acid levels by means of liquid chromatography-mass spectrometry. Pharmacokinetic values of area under the curve from time point 0 to 24 hours point of maximum concentration, time of maximum concentration, volume of distribution, clearance, and elimination half-life were analyzed for statistical significance with SPSS v25 software. RESULTS: Pregnant women had a 40% ± 4% reduction in area under the curve from time point 0 to 24 hours (P < .01) and 29% ± 3% reduction in point of maximum concentration (P < .01) with a 44% ± 8% increase in clearance (P < .01) in comparison to that in nonpregnant women when 100 mg aspirin was administered. The reduction in the area under the curve from time point 0 to 24 hours, however, was minimized with the use of 150 mg aspirin in pregnant women, with which the area under the curve from time point 0 to 24 hours was closer to that achieved with the use of 100 mg aspirin in nonpregnant women. There was a 4-hour delay (P < .01) in the time of maximum concentration, a 47% ± 3% reduction in point of maximum concentration (P < .01) and a 48% ± 1% increase in volume of distribution (P < .01) with the use of 100 mg enteric-coated aspirin compared to non-enteric-coated aspirin, with no difference in the overall area under the curve. There was no difference in the pharmacokinetics of aspirin between morning and evening dosing. CONCLUSION: There is a reduction in the total drug metabolite concentration of aspirin in pregnancy, and therefore a dose adjustment is potentially required in pregnant women. This is likely due to the altered pharmacokinetics of aspirin in pregnancy, with an increase in clearance. There was no difference in the total drug metabolite concentration of aspirin between enteric-coated and non-enteric-coated aspirin and between morning and evening dosing of aspirin. Further pharmacodynamic and clinical studies are required to examine the clinical relevance of these pharmacokinetic findings.

The effect of acetyl salicylic acid (Aspirin) on trophoblast-endothelial interaction in vitro.

Early administration of low dose acetyl salicylic acid (Aspirin) in high risk women reduces the risk of early onset preeclampsia. This study aims to investigate the effect of aspirin on trophoblast integration and the its effect on angiogenic and invasive pathways in an in-vitro model of preeclampsia. Red fluorescent-labeled human uterine myometrial microvascular endothelial cells (UtMVECs) were seeded on matrigel to form endothelial networks. Green fluorescent-labeled trophoblastic HTR-8/SVneo cells were co-cultured with the endothelial networks with/without TNF-a (0.5ng/mL) and/or aspirin (0.1mM) for 24h. Fluorescent images were captured and quantified by Image J to examine the effects of TNF-a and aspirin on the trophoblast-endothelial integration. Conditioned media were collected to measure free VEGF, PlGF and sFlt-1 by ELISA and PGF1a by Enzyme immunoassay (EIA). Cells were retrieved to examine mRNA expression of angiogenic factors (VEGF, PlGF and sFlt-1), invasion markers (MMP-2 and TIMP-1), endothelial cell activation markers (E-selectin and VCAM), eNOS and cyclooxygenase (COX)-2 by quantitative PCR. Aspirin reversed the inhibitory effect of TNF-a on trophoblast cell integration into endothelial cellular networks. TNF-a increased PGF1a production (128±11%, p<0.05), whilst aspirin reversed the TNF-a effect on PGF1a production (19±4%, p<0.01). TNF-a decreased the mRNA expression of PlGF, eNOS, MMP-2 and TIMP-1, and stimulated COX2, E-selectin and VCAM mRNA expression. Aspirin did not reverse the TNF-a effect on these molecules. Aspirin improves trophoblast cell integration into endothelial cellular networks by inhibiting the effect of TNF-a via PGI2 with no significant effect on antiangiogenic, invasive or endothelial activation markers.

Secondary hypertension due to concomitant aldosterone-producing adenoma and parathyroid adenoma.

There is a growing body of evidence supporting a bidirectional relationship between parathyroid hormone (PTH) and aldosterone (Aldo). We report a case of secondary hypertension due to concomitant Aldo-producing adenoma (APA) and parathyroid adenoma (PA) requiring both unilateral adrenalectomy and parathyroidectomy.

Vascular calcification in patients undergoing kidney and simultaneous pancreas-kidney transplantation.

AIM: Vascular calcification (VC) is common in patients with chronic kidney disease (CKD) on dialysis, and an inverse relationship of VC to bone mineral density (BMD) has been reported. Because elderly patients are prone to atherosclerosis and BMD artefact, we examined the prevalence and epidemiology of VC in younger patients undergoing transplantation, and its relationship to BMD. METHODS: Laboratory testing was performed immediately before kidney or simultaneous pancreas-kidney (SPK) transplantation. Within 4 weeks patients underwent BMD evaluation and lateral abdominal X-ray. Aortic calcification was scored using a validated 24-point scale. RESULTS: Of 650 consecutive patients X-rays were available for 531 (82%). Their median age was 41 years (16-71), 58% were male, dialysis vintage was 20 months (0-402) and 69% had kidney and 31% SPK transplants. VC scores were ≥1 in 47%, with the median score 6 (1-24) and was associated with age, dialysis vintage and presence of cardiovascular, cerebrovascular or peripheral vascular disease. In a multivariate analysis of patients with and without VC, those with VC were older and of longer dialysis vintage (OR 1.07 and 1.17 per 12 months respectively; P < 0.001 for both). In that analysis, VC was not significantly associated with gender, transplant type, presence of diabetes, current or former smoking or calcium or calcitriol therapy, and was not inversely related to hip, spine or forearm BMD Z-scores. CONCLUSION: VC is common in younger patients undergoing transplantation and, similar to older patients, is associated with age, dialysis vintage and cardiovascular pathology. However, in this younger patient group, there was no significant inverse association of VC to BMD.

Fluid balance, change in serum creatinine and urine output as markers of acute kidney injury post cardiac surgery: an observational study.

BACKGROUND: Acute kidney injury (AKI) is defined as oliguria or rise in serum creatinine but oliguria alone as a diagnostic criterion may over-diagnose AKI. OBJECTIVES: Given the association between fluid overload and AKI, we aimed to determine if positive fluid balance can complement the known parameters in assessing outcomes of AKI. DESIGN: Prospective observational study. SETTING: Teaching hospital in Vancouver, Canada. PATIENTS: 111 consecutive patients undergoing elective cardiac surgery from January to April 2012. MEASUREMENTS: Outcomes of cardiac surgery intensive care unit (CSICU) and hospital length of stay (LOS) in relation to fluid balance, urine output and serum creatinine. METHODS: All fluid input and output was recorded for 72 hours post-operatively. Positive fluid balance was defined as >6.5 cc/kg. Daily serum creatinine and hourly urine output were recorded and patients were defined as having AKI according to the AKIN criteria. RESULTS: Of the patients who were oliguric, those with fluid overload trended towards longer LOS than those without fluid overload [CSICU LOS: 62 and 39 hours (unadjusted p-value 0.02, adjusted p-value 0.58); hospital LOS: 13 and 9 days (unadjusted p-value: 0.05, adjusted p-value: 0.16)]. Patients with oliguria who were fluid overloaded had similar LOS to patients with overt AKI (change in serum creatinine ≥ 26.5 µmol/L), [CSICU LOS: 62 and 69 hours (adjusted p value: 0.32) and hospital LOS: 13 and 14 days (adjusted p value: 0.19)]. Patients with oliguria regardless of fluid balance had longer CSICU LOS (adjusted p value: 0.001) and patients who were fluid overloaded in the absence of AKI had longer hospital LOS (adjusted p value: 0.02). LIMITATIONS: Single centre, small sample, LOS as outcome. CONCLUSIONS: Oliguria and positive fluid balance is associated with a trend towards longer LOS as compared to oliguria alone. Fluid balance may therefore be a useful marker of AKI, in addition to urine output and serum creatinine.

CONTEXTE: L'insuffisance rénale aiguë (IRA) se définit comme une oligurie ou une élévation de la créatininémie. Par contre, l'oligurie comme unique critère diagnostique peut mener abusivement au diagnostic d'IRA. OBJECTIFS: Étant donné l'association entre l'hyperhydratation et l'IRA, nous cherchons à déterminer si une balance liquidienne positive peut complémenter les paramètres connus dans l'évaluation des résultats de l'IRA. TYPE D'ÉTUDE: Étude d'observation prospective. CONTEXTE: Hôpital universitaire à Vancouver, Canada. PARTICIPANTS: 111 patients consécutifs qui subissent une chirurgie cardiaque non urgente, entre janvier et avril 2012. MESURES: On a mis en parallèle les résultats de l'unité de soins intensifs en chirurgie cardiaque (USICC), de même que la durée de l'hospitalisation (soins actifs), avec la balance liquidienne, la diurèse et la créatininémie. MÉTHODES: On a mesuré les ingesta et excreta durant les 72 heures postopératoires. On a défini une balance liquidienne positive à >6,5 cc/kg. On a enregistré la créatininémie quotidienne et la diurèse aux heures, et on a déterminé que les patients souffraient d'IRA en nous basant sur les critères de l'Acute Kidney Injury Network (AKIN). RÉSULTATS: Parmi les patients oliguriques, ceux qui avaient une surcharge liquidienne tendaient davantage vers une hospitalisation prolongée que ceux qui n'en avaient pas [durée de soins actifs à l'USICC: 62 et 39 heures (valeur de p non ajustée: 0,02, valeur de p ajustée: 0,58); durée de soins actifs à l'hôpital: 13 et 9 jours (valeur de p non ajustée: 0,05, valeur de p ajustée: 0,16)]. Les patients présentant une oligurie qui présentaient aussi une surcharge liquidienne requéraient une durée de soins actifs similaire aux patients souffrant d'IRA (modification de la créatininémie ≥ 26,5 µmol/L), [soins actifs USICC: 62 et 69 heures (valeur de p ajustée: 0,32) soins actifs à l'hôpital: 13 et 14 jours (valeur de p ajustée: 0,19)]. Les patients présentant une oligurie, indépendamment de la balance liquidienne, bénéficiaient d'une durée de soins actifs à l'USICC prolongée (valeur p ajustée: 0,001), tandis que les patients en surcharge liquidienne, mais ne souffrant pas d'IRA bénéficiaient davantage de soins actifs à l'hôpital (valeur de p ajustée: 0,02). LIMITES DE L'ÉTUDE: Un seul centre, un échantillon restreint, les soins actifs considérés comme une issue. CONCLUSION: Les patients avec oligurie et une balance liquidienne positive ont nécessité des soins actifs prolongés à l'USICC, comparativement aux patients ne présentant qu'une oligurie. La balance liquidienne peut donc constituer un marqueur d'IRA, en plus de la diurèse et la créatininémie.

A case of recurrent severe pre-eclampsia associated with essential cryofibrinogenaemia.

Essential cryofibrinogenaemia is a rare disorder characterized by cryofibrinogens without cryoglobulins. Connective tissue disorders and thrombophilia are known to increase risk of pre-eclampsia, but pre-eclampsia has not previously been reported in association with cryofibrinogenaemia. We report the case of a 32-year-old woman with recurrent severe pre-eclampsia diagnosed with essential cryofibrinogenaemia.

Levetiracetam-induced severe acute granulomatous interstitial nephritis.

Granulomatous interstitial nephritis (GIN) is an uncommon cause of renal failure, which may be caused by drugs. Levetiracetam is an increasingly used anti-epileptic medication that is not known to cause renal toxicity in adults. To our knowledge, levetiracetam has not previously been reported as a cause of GIN. We report the case of a 69-year-old woman who developed haemodialysis-requiring acute renal failure after commencement of treatment with levetiracetam, which was shown to be GIN by renal biopsy. She made a complete recovery with cessation of levetiracetam and treatment with steroids.