RESUMO
Objective Toevaluatetheinterventionaltherapeuticefficacyoflowerureteralstricturesandobstructionbyimplantation of"doubleGJ"stentsbytheguidewiretrackwithtwowaysjointofpercutaneousnephrocentesisandurethra.Methods 45caseswith malignanttumoroflowerureteralstrictureorobstructionweretreatedwithballooncatheterdilatation,andthenthe"doubleJ"tube wasimplantedusingpercutaneousnephrostomyandurethradoublepathguidedwireorbit.Postoperativeurinevolume,renalfunction, colordopplerultrasoundandCTfollowGupwereobservedandreviewedfor3－12monthsaftersurgery.Results Thesuccessfulrate oftheoperationwas100%(45/45),withtheureteralobstructionrelievedandtheclinicalsymptomsimproved.After7days,renal functionfullyrecoveredtonormalin39patients,andsignificantlyimprovedin6patients.Conclusion Implantationof "doubleGJ"stentsbytheguidewiretrackwithpercutaneousnephrocentesisandtransurethraldoublepathisasimple,effectiveandminimallyinvasive treatmentformalignantureteralstrictureandobstruction.