4 research outputs found

    Isonatraemic haemodialysis in the management of salt and water overload: a crossover trial at an academic hospital in Dakar, Senegal

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    Introduction: The aims of this study were to assess the impact of isonatraemic haemodialysis on reduction of interdialytic weight gain (IDWG) and blood pressure (BP) as well as its tolerability in our study population. Methods: This crossover trial, at the Aristide Le Dantec University Hospital in Senegal, was conducted on 32 patients with kidney failure who were stable on treatment with chronic haemodialysis. In the initial “control phase”, patients had nine haemodialysis sessions with a dialysate sodium (Na+) concentration (Na+ dialysate) of 138 mmol/L. The serum Na+ set point (SP) for each patient was calculated from three predialytic mid-week values. In the second phase, the “individualized phase”, patients had nine haemodialysis sessions with Na+ dialysate equal to their SP. Results: The mean age of the patients was 55.5 ± 12.1 years, with a male/female ratio of 1.3 and the most common cause of kidney disease was hypertension (47%). Mean predialytic serum Na+ concentration was 135.8 ± 1.9 mmol/L, with a mean intra-individual coefficient of variation of 2%. Mean interdialytic weight gain (IDWG) was 1.9 kg and 1.8 kg in the control and individualized phases, respectively (P = 0.75). A reduction in postdialytic systolic blood pressure (BP) was observed during the individualized phase (P = 0.04). A similar trend was noted in pre- and intradialytic BP but this was not statistically significant. Apart from headaches, which were more common in the individualized phase (P = 0.04), isonatraemic haemodialysis was well tolerated. Conclusions: IDWG as well as pre- and intradialytic BP were unaffected by isonatraemic haemodialysis. Postdialytic BP was significantly reduced. Introduction: Les objectifs de cette étude étaient d’évaluer l’impact de l’hémodialyse isonatrémique sur la réduction de la prise de poids inter-dialytique (PPID) et de la pression artérielle (PA) ainsi que sa tolérance dans notre population d’étude. Méthodes: Cet essai croisé a été mené au centre hospitalier universitaire Aristide Le Dantec de Dakar (Sénégal) chez des patients hémodialysés chroniques. Durant la première phase dite « phase contrôle », les patients ont eu neuf séances d’hémodialyse avec une concentration de sodium dans le dialysat (Na+ dialysat) de 138 mmol/L. Le set-point (SP) de la natrémie a été calculé pour chaque patient et correspondait à la moyenne de 3 natrémies pré-dialytiques en milieu de semaine. Durant la deuxième phase dite « phase individualisée », les patients ont eu neuf séances d’hémodialyse avec du Na+ dialysat égal à leur SP. Résultats: Trente-deux patients ont été inclus. L’âge moyen était de 55,5 ± 12,1 ans avec un ratio homme/femme de 1,3 et la néphropathie initiale la plus fréquente était l’hypertensive (47%). La natrémie pré-dialytique moyenne était de 135,8 ± 1,9 mmol/L, avec un coefficient de variation intra-individuel moyen de 2 %. La PPID moyenne était de 1,9 kg et 1,8 kg dans les phases de contrôle et individualisé, respectivement (P = 0,75). Une diminution de la PA systolique post-dialytique a été observée au cours de la phase individualisée (P = 0,04). Une tendance similaire sans significativité statistique a été notée sur les PA pré- et intra-dialytiques. Hormis les céphalées, plus fréquentes pendant la phase individualisée (P = 0,04), l’hémodialyse isonatrémique a été bien tolérée. Conclusions: La PPID, les PA pré- et intra-dialytiques n’ont pas été affectées par l’hémodialyse isonatrémique. La PA post-dialytique était significativement réduite

    Evaluation de l’état hydrique chez les patients hémodialysés chroniques : une étude transversale monocentrique: Assessment of the hydration status in chronic hemodialysis patients: a single-center cross-sectional study

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    Context and objective. For many practitioners, blood pressure is the main indicator of the hydration status of the chronic hemodialysis patient. The objective of this study was to assess the extent to which bioimpedance analysis (BIA) can assist in determining acute changes in fluid volume during the hemodialysis session. Methods. This was a 9-week longitudinal study. The total body water (TBW) was measured with a BIA analyzer, before and after 6 successive sessions. The ΔWeight was compared to the ΔTBW by calculating the P/V ratio (ΔWeight/ΔTBW) with the assumption that the dry weight is reached when P/V = 1. Results. The measurements made in 22 patients (46.6 years, 54.5% men, 92.3 months on dialysis) were reproducible. There was no statistically significant difference between ΔTBW and ΔWeight. However, at the individual level, significant differences had been observed. Using hypertension as a marker for a state of hyperhydration, a 31.8% agreement was noted between the P/V ratio and hypertension. Conclusion. Although the loss of water predicted by the BIA did not always correspond to the weight loss, BIA is a technique that can be used to assess the variations in TBW during the hemodialysis session in patients. Contexte et objectif. La pression artĂ©rielle est pour de nombreux praticiens, l’indicateur principal du statut hydrique du patient hĂ©modialysĂ© chronique. L’objectif de la prĂ©sente Ă©tude Ă©tait d’évaluer dans quelle mesure l’analyse d’impĂ©dance bioĂ©lectrique (BIA) pourrait aider Ă  la dĂ©termination des variations aigues du volume hydrique au cours de la sĂ©ance d’hĂ©modialyse. MĂ©thodes. Il s’agissait d’une Ă©tude de suivi longitudinal sur 9 semaines. Le volume total d’eau (VTE) a Ă©tĂ© mesurĂ© par BIA, avant et après 6 sĂ©ances. Le ΔPoids a Ă©tĂ© comparĂ© au ΔVTE par le calcul du ratio P/V (ΔPoids / ΔVTE) dans l’hypothèse que le poids sec est atteint lorsque P/V = 1. RĂ©sultats. Les mesures faites chez 22 patients (46,6 ans, 54,5% hommes, 92,3 mois en dialyse) Ă©taient reproductibles. Il n’y avait pas de diffĂ©rence statistiquement significative entre le ΔVTE et le ΔPoids. Cependant Ă  l’échelon individuel des diffĂ©rences importantes Ă©taient observĂ©es. En utilisant l’hypertension artĂ©rielle (HTA) comme marqueur d’un Ă©tat d’hyperhydratation, une concordance de 31,8% Ă©tait notĂ©e entre le ratio P/V et l’HTA. Conclusion. Bien que la perte d’eau prĂ©dite par la BIA ne corresponde pas toujours Ă  celle du poids, la BIA est une technique qui peut ĂŞtre utilisĂ©e pour Ă©valuer les variations du VTE au cours de la sĂ©ance d’hĂ©modialys

    Évaluation de la performance de la mesure conventionnelle et séquentielle de la pression artérielle en centre chez les patients en dialyse péritonéale à Dakar.

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    Introduction: The aim of this study was to evaluate the performance of conventional (CBPM) and sequential (SBPM) blood pressure measurements in peritoneal dialysis (PD) patients using ambulatory blood pressure measurements (ABPM) as a reference. Patients and methods: Through a cross-sectional study including 17 patients followed in the PD unit of the Aristide Le Dantec Hospital, BP was measured by 3 methods: i) an automated measurement (OMRON M3 COMFORTTM) performed by a health care staff called CBPM; ii) the average of 5 automated measurements in an isolated patient in a cubicle called SBPM; iii) 24-hour ABPM with the CONTECTM device (Germany). High blood pressure was considered when the BP was higher than 130/80 mmHg at the 24-hour ABPM. Results: The area under the curve (AUC) for systolic blood pressure (SBP) was similar (p=0.28) between SBPM [AUC, 0.933; 95% CI, 0.813 – 1.000] and CBPM [AUC, 0.900; 95% CI, 0.752 – 1.000]. Regarding diastolic blood pressure (DBP), SBPM [AUC, 0.858; 95% CI, 0.638 – 1.000] was similar (p=1) to CBPM [AUC, 0.917; 95% CI, 0.753 – 1.000]. On Bland-Altman analysis, CBPM overestimated SBP by 11.65 mmHg and DBP by 3.94 mmHg. SBPM overestimated SBP by 6.2 mmHg and DBP by 4.35 mmHg. Conclusion: SBPM and CBPM are efficient in the diagnosis of ambulatory hypertension in PD patients in Dakar.Introduction : L’objectif de cette Ă©tude Ă©tait d’évaluer les performances des mesures conventionnelles (MCPA) et sĂ©quentielles (MSPA) de la pression artĂ©rielle en prenant la MAPA comme rĂ©fĂ©rence. Patients et mĂ©thodes : A travers une Ă©tude transversale incluant 17 patients suivis dans l’unitĂ© de DP de l’HĂ´pital Aristide Le Dantec, la PA a Ă©tĂ© mesurĂ©e par 3 mĂ©thodes : i) une mesure automatisĂ©e (OMRON M3 COMFORT) effectuĂ© par un personnel de santĂ© dite MCPA (OMRON M3 COMFORTTM) ; ii) la moyenne de 5 mesures automatisĂ©es chez un patient isolĂ© dans un box dite MSPA ; iii) la MAPA des 24h avec l’appareil CONTECTM (Germany). L’HTA a Ă©tĂ© retenue devant une PA supĂ©rieure Ă  130/80 mmHg Ă  la MAPA des 24h. RĂ©sultats : L’aire sous la courbe (AUC) de la PAS Ă©tait similaire (p=0,28) entre la MSPA [AUC, 0,933 ; IC Ă  95 %, 0,813 – 1,000] et la MCPA [AUC, 0,900 ; IC Ă  95 %, 0,752 – 1,000]. Concernant la PAD, la MSPA [AUC, 0,858 ; IC Ă  95 %, 0,638 – 1,000] Ă©tait similaire (p=1) Ă  la MCPA [AUC, 0,917 ; IC Ă  95 %, 0,753 – 1,000]. Ă€ l’analyse de Bland-Altman, la MCPA surestimait  la PAS de 11,65 mmHg et la PAD de 3,94 mmHg. La MSPA quant Ă  elle surestimait la PAS de 6,2 mmHg et la PAD de 4,35 mmHg. Conclusion : La MSPA et la MCPA sont performantes dans le diagnostic de l’HTA ambulatoire chez les patients en dialyse pĂ©ritonĂ©ale Ă  Dakar

    Usefulness of foot-to-foot bioimpedance analysis for assessing volume status in chronic hemodialysis patients at the Aristide Le Dantec University Hospital (Senegal)

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    Introduction: Determination of dry weight is one of the daily goals to achieve in hemodialysis. The aim of this study was to validate the use of bioelectrical impedance analysis (BIA) in estimation of dry weight in a population of Senegalese chronic hemodialysis patients. Patients and methods: A 9-week cross-sectional study was carried out at the hemodialysis unit of Aristide Le Dantec University Hospital. Adult patients with no previous hospital history were included. The total body water (TBW) was measured with a single frequency bioelectric impedance foot-to-foot analyzer, before and after six successive hemodialysis sessions. These results were compared with those from clinical measurements with the Watson equation using a Student’s t-test and Bland-Altman analysis. Results: 264 measurements were made in 22 patients (46.6 years, 54.5% men, 92.3 months on dialysis, 62.7 kg mean dry weight). A significant reduction in weight (ΔWeight = 2.0 ± 1.1 kg; p < 0.0001) and in TBW measured by the BIA (ΔTBWBIA = 3.3 ± 1.0 liters; p < 0.0001)) or calculated by Watson’s equation (ΔTBWWatson = 0.5 ± 0.2 liter; p = 0.0001) was observed. There was a strong linear correlation and agreement between the 2 TBW measurements in pre-dialysis. In post-dialysis the concordance diagram indicated a bias = –2.2 and wide agreement limits. Conclusion: The BIA allows reproducible and reliable measurements and a fair estimate of the TBW in pre-dialysis
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