This invention provides a dual-segment, dual-color pH comparison
catheter for clinical identification of
premature rupture of membranes, belonging to the field of medical
catheter technology. It includes a main
catheter tube with a
urine segment pH membrane and an
amniotic fluid segment pH membrane sequentially arranged along the axial direction on the anterior outer wall of the main tube. The
urine segment pH membrane has a color development range of pH 5.5-6.5, and its color change is a continuous gradient from yellow to green. This invention achieves zero-sampling detection under sterile conditions, highly integrating pH identification function into routine catheterization procedures. The pH value of
urine and any potentially mixed
amniotic fluid is simultaneously detected upon
catheter insertion into the bladder, without the need for
vaginal speculum, sampling swabs, or any form of secondary sterile opening. This design completely blocks the path of exogenous
bacteria into the maternal
reproductive tract at a
physical level, thereby fundamentally and effectively reducing the incidence of clinically common chorioamnionitis and urinary tract infections, and improving perinatal
medical safety and quality.