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UK/HEMA/FME/0922/0005 Date of Preparation: November 2022

Individualised Sodium Management with the 6008 CAREsystem

Individualised sodium managementwith the 6008 CAREsystem allows for a diffusive sodium balance.

One important goal in dialysis therapy is to keep interdialytic dietary salt intake and intradialytic sodium removalbalanced. The sodium load during dialysis may lead to an increase in interdialytic weight gain and hypertension, both ofwhich are major cardiovascular risk factors.

PatientsĢý predialysis serum sodium is widely spread1

The graph shows predialysis serum sodium for 369 unselected patients averaged over a period of six months (dialysate sodium 137 mmol/l, laboratory normal range for serum sodium concentration 135Ģý145 mmol⁄l).

Currently, sodium concentration of the predialysisplasma is usually rarely determined individually. If thedialysate sodium should not follow a standardprescription,but rather, should be aligned to the predialysis
plasma sodium, plasma sodium must be determinedin the laboratory prior to each dialysis treatment withoutsodiummanagement.

The individual dialysatesodiumprescription is the key factor to setting thesodium concentration gradient.

Acting on diffusive sodium mass transfer in terms of a reduced diffusive sodium loadmay lead to:

  • A reduction of thirst1
  • A reduction of interdialytic weight gain2
  • A modification of short-term outcomes thanks to reduced fluid overload and reduced blood pressure3

Graph adapted from reference;Lindley EJ, Reducing sodium intake in hemodialysis patients. Semin Dial. 2009 May-Jun;22(3):260-263.

National Kidney Foundation and the EBPG guidelines strongly recommend individualised dialysate sodium4,5

Sodium loading during HD clearly results in greater thirst with resultant volume expansion and increased cardiac workload and subsequent hypertension.4
There is evidence to suggest that high dietary sodium intake and inadequate sodium removal during HD can result in excess fluid intake and hypertension.
Individualising dialysate sodiumto the plasma sodiumconcentration may improve haemodynamic stability during dialysis.5

The 6008 CAREsystem Sodium Management facilitates individualised dialysate sodium prescription management in order to better meet guideline recommendations. The individualised Sodium Management helps to avoid sodium load during dialysis.

Easy alignment of dialysate sodium with plasma sodium concentration

Continuous measurements of dialysate conductivity determine the amount of diffusive sodium supplied to or removed from the patient. The device continuously measures the conductivity of the incoming and outgoing dialysate and determines the sodium balance using a kinetic model. Sodium Control (Na control) automatically adapts the dialysate sodium to the plasma sodium of the patient. It individualizes the sodium prescription, helping to avoid additional costs and workload, can make extra time-consuming blood samples obsolete and is easily implemented in clinical practice.

Principle of continuous balancing of diffusive sodium transfer with individualised Sodium Management

Information about patientsĢý salt intake enhances nutritional education

Salt intake during the interdialytic period is dependent on patient behavior and is a strong driver of volume overload.7Visualisation of patientsĢý sodium removal with Sodium Management provides information about interdialytic salt intake, enhances nutritional education and may improve HD patient outcomes.

Combining Sodium Management and BCM-based assessment of fluid status lays the path for precise and personalized sodium and fluid management and may improve haemodialysis patient outcomes.

The trend of predialysis plasma sodium may indicate pathologic changes

The monitoring of predialysis plasma sodium trend data (supported by a TDMS Ģý Therapy Data Management System**)could indicate potential pathologic changes over time.

This information may be clinically used as a trigger for further considerations in case of deviations from the normal range, or for monitoring short- and mid-term trends for potential indication of pathological changes.8

**Therapy Data Management System is an umbrella term for different products, which are optional and must be purchased separately

Benefits of the easy and individualised Sodium Management with the 6008 CAREsystem

  • Controlling diffusive sodium transfer allows for an individualised sodium prescription.
  • Visualisation of patientsĢý sodium removal for every treatment provides valuable information about their interdialytic salt intake.
  • Trend analysis via optional data management** of predialysis plasma sodium may help to indicate pathologic changes.

Distribution of plasma sodium changes

Graph:Zero sodium diffusion narrows the distribution of plasma sodium changes.9

Frequency distribution of intradialytic plasma sodium changes when dialysing 30 patients either with a standard fixed dialysate sodium of 138 mmol/l (light blue) or with sodium management and a target of zero diffusive transfer (dark blue).

Graph adapted from reference;Canaud et al.,Kidney International (2019) 95, 296-309

Sodium Management video

Sodium Management: a therapy feature available with the 6008 CAREsystem

Prof. Bernard Canaud
Emeritus Professor of Nephrology |Montpellier University, France
Chief Medical Scientist |Global Medical Office EMEA

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UK/HEMA/FME/0922/0005 Date of Preparation: November 2022

Related content

1.Lindley EJ, Reducing sodium intake in hemodialysis patients. Semin Dial. 2009 May-Jun;22(3):260-263.


2.Raimann JG, Thijssen S, Usvyat LA, et al., Sodium alignment in clinical practiceimplementation and implications. Semin Dial. 2011;24:587Ģý592.

3.Sagova et al., Automated individualisation of dialysate sodium concentration reduces intradialytic plasma sodium changes in hemodialysis. Artif Organs. 2019 Oct; 43(10):1002-1013.

4.National Kidney Foundation, KDOQI clinical practice guideline for hemodialysis adequacy: 2015 update. Am J Kidney Dis. 2015;66(5):884-930.

5.Kooman et al., EBPG guideline on haemodynamic instability Nephrol Dial Transplant 2007; 22 [Suppl 2]:ii22-ii44.

6.Canaud B et al., Sodium and water handling during hemodialysis: new pathophysiologic insights and management approaches for improving outcomes in end-stage kidney disease. Kidney International 2019;95:304.

7.Basile C, and Lomonte C., A neglected issue in dialysis practice: haemodialysate. Clin Kidney J. 2015;8:393Ģý399.

8.Maierhofer A et al., EDTA-Poster 2019 FP546, ĢýConductivity based online estimation of predialytic plasma Na: clinical assessmentĢý.

9.Canaud et al.,Kidney International (2019) 95, 296-309.