Intracorpoval urinary catheter for online monitoring sodium in urea
A urinary catheter and urinary sodium technology, which is applied in the field of medical devices, can solve the problems of inability to accurately reflect the immediate state of the patient, inability to be used as a dynamic monitoring method, and a large probability of human error, achieving significant clinical practical value, reducing the occurrence of renal failure and renal failure. Dialysis, fast response effect
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[0022] Such as figure 1 Shown is the miniature sodium sensor 13 of the present invention. In a cylindrical polyurethane housing 1 with a diameter of 0.5 cm, there are two cylindrical cavities 8, 9 longitudinally, and the diameter of the cavity 9 is twice the diameter of the cavity 8: the diameter of the cavity 9 is 0.2 cm, and the cavity The diameter of 8 is 0.1 cm. The upper ends of the two cylindrical cavities 8 and 9 are all closed, and each of the closed end centers has an inherent electrode. The cavity 8 is an external reference electrode (Ag / AgCl) 3, and the cavity 9 is a sodium internal reference electrode (Ag / AgCl). / AgCl) 2; the exposed ends of the two electrodes 2 and 3 are connected to lead wires 14; the lower end of the cavity 8 has a porous ceramic core 7, which is the liquid junction of the reference electrode, and the lower end of the cavity 9 is stuck with a sodium sensor film 6. The composition of the sodium sensor membrane 6 is: A) Selective active substanc...
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