Novel polymeric solid-phase extraction material for complex biological matrices. Portable and disposable artificial kidney.

The replacement of conventional hemodialysis treatment for a patient with malfunctioning kidneys by providing him/her with a portable and disposable "artificial kidney" which is connected to implanted artery and veneous cannulas on a patient's wrist is discussed. During a continuous flow of blood, plasma diffuses through a plasmapheretic membrane, passes through a bed of plasmacompatible sorbent Styrosorb, and arrives at an ultrafiltration membrane. Vacuum-operated ultrafiltration removes excess water together with dissolved urea and other small molecules, and Stryosorb removes medium-sized toxic substances. The hemocompatibility of the sorbent is improved by chemical modification of the surface.

[The use of a polyphosphazene prosthesis for the frontonasal anastomosis in the surgical treatment of acute and chronic inflammatory diseases of the frontal sinus (a preliminary report)]. / Ispol'zovanie polifosfazenovogo proteza lobno-nosovogo soust'ia pri khirurgicheskom lechenii ostrykh i khronicheskikh vospalitel'nykh zabolevanii lobnykh pazukh (predvaritel'noe soobshchenie).

The paper describes a prosthetic technique for frontonasal bypass. The synthetic polymer polyphosphazene used in this repair promises long-time wear of the prosthesis.