-The surface of the large diameter three-way foley catheter we design and produce has been modified with the hydrophilic polyurethane,which makes the inner &.outer cavity very smooth.Observed from the canning electron microscope,the cracks of the catheter are closed up,and its surface is much smoother than that of the natural latex catheter. Besides these, we also give the catheter very strict physical,chemical & biological tests.And it matches all the technical targets with those of concerning stipulations.Through the clinical observations on 40 patients,the surface modiried large di-ameter three-way foley catheter is much better tban the emulsion catheter and catheter with mushroom-like tip.This catheter has many advantages,such as surface smooth, diameter large, easy for urinating and irrigating or bladder & pelvis, no urine salt sedimentation arter a long Period,stable, good biocompatibility,easy for operation changing,long period for the use of one catheter,and so on.
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