{"id":169,"date":"2013-10-25T06:16:13","date_gmt":"2013-10-25T00:46:13","guid":{"rendered":"http:\/\/wp.kidneyadvice.net\/wordpress\/?page_id=169"},"modified":"2013-11-18T06:34:20","modified_gmt":"2013-11-18T01:04:20","slug":"requirements","status":"publish","type":"page","link":"https:\/\/wp.kidneyadvice.net\/wordpress\/?page_id=169","title":{"rendered":"Requirements"},"content":{"rendered":"

Previous:Hemodialysis basics<\/a><\/p>\n

Dialyzer<\/h2>\n

\"\"\"\"<\/p>\n

A dialyzer is actually a semipermeable membrane designed into thousands of small ‘capillary’ like tubes and placed into a cartridge as shown in the adjoining picture. This effectively creates two compartments, one for the blood flow and another for the dialysate flow.<\/p>\n

A dialysate is a solution that contains electrolytes and other substances at physiological concentration.<\/p>\n

The blood flow and the dialysate flow are in opposite directions.<\/p>\n

Hemodialysis Machine<\/h2>\n

\"\"<\/p>\n

Hemodialysis machine is required to pump the blood at requisite flow. Apart from this, the machine mixes three different components of dialysis solution to make it into a dialysate with physiological concentrations of electrolytes.<\/p>\n

The machine also monitors the flow parameters and the pressures in the circuit.<\/p>\n

The amount of ultrafiltration ( removal of excess fluid from the body) can be programmed into the machine and current day machines will precisely remove the fluid to the last milliliter.<\/p>\n

Dialysis<\/h2>\n

Having seen the hardware and the circuit, understanding the actual process of dialysis becomes easy.<\/p>\n

W\"\"hen blood with toxins and high concentrations of substances is exposed to a solution with normal concentrations of substances, there is a natural gradient towards the dialysate and all the waste products and excess water are ‘washed’ away by the dialysate.<\/p>\n

Since the blood and the dialysate are flowing in the opposite directions, this concentration gradient is constantly maintained across the length of the dialyzer.<\/p>\n

Having understood this, one can make out that if efficiency of dialysis is to be enhanced, one can increase the blood flow (by adjusting the ‘pump rate’) and\/or increasing the dialysate flow.<\/p>\n

A similar effect can also be achieved by exposing the two solutions to each other for a longer time, i.e., increasing the duration of dialysis.<\/p>\n

Next: Adequacy of Hemodialysis<\/a><\/p>\n

\n\n

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Previous:Hemodialysis basics Dialyzer A dialyzer is actually a semipermeable membrane designed into thousands of small ‘capillary’ like tubes and placed into a cartridge as shown in the adjoining picture. This effectively creates two compartments, one for the blood flow and another for the dialysate flow. A dialysate is a solution that contains electrolytes and other …<\/p>\n

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