Lifesaving Application to Efficiently Clean Blood


Hemodialysis is a medical procedure where blood is artificially cleaned. This involves blood passing through a dialyzer (an artificial kidney) to remove waste and excess water. The hemodialysis machine controls all flux of fluids involved in the treatment: blood flux from the patient through the dialyzer then back to the patient, as well as dialysate flux through the dialyzer which is then properly disposed. Dialysis fluid is ultra-pure water with a controlled amount of electrolytes that is produced in the hospital or dialysis center.





Making Membranes as Efficient as Kidneys

The dialyzer uses tiny hollow filters that look like microscopic straws called a semi-permeable membrane made from Udel® PSU and Veradel® PESU. As blood moves inside these tubes, it comes into contact with a solution that is circulated in the space outside the hollow fibers: large molecules such as blood cells and large proteins are kept inside the membrane, but smaller molecules and biological waste like urea and water pass through the small pores of the membrane.


Udel® PSU and Veradel® PESU:
High Performance for Hemodialysis

Over 90% of all dialysis membranes used to treat chronic kidney disease are made from polysulfone (PSU) or polyethersulfone (PESU). Udel® PSU and Veradel® PESU have become the polymers of choice for these membranes.

  • Purity, Biocompatibility and Selectivity
    Udel® PSU and Veradel® PESU provide the purity, biocompatibility and selectivity needed to make membranes that filter out toxins, that are then eliminated in the used dialysis fluid, and return clean blood to kidney patients.

  • Hemodialysis Dialyzers made from Udel® PSU and Veradel® PESU are designed for single-use and are compatible with several types of sterilization methods, including steam, ethylene oxide and gamma radiation.

  • Faster, Easier Processing
    The molecular structure of Udel® PSU and Veradel® PESU means the fine hollow fiber elements needed for membranes can be easily formed. A range of narrow molecular weights with controlled viscosities makes it quicker to fine-tune dope solutions and optimize the membrane manufacturing processes.