Abstract:Abstract: Objective To evaluate the efficacy of idiopathic subcapsular fluid collection in the treatment of microchannel puncture drainage combined with implantation Double J into Ureter. Methods Data of 16 patients (4 males and 12 females, average (40.00 ± 4.00) years old, 10 one sides and 6 Both sides) with idiopathic renal subcapsular effusion were retrospectively analyzed. Ultrasound, IVU, CT and puncture fluid examination were recommended to confirm the diagnosis before operation. Microchannel puncture drainage combined with implantation Double J into Ureter were performed under local anesthesia and ultrasound guidance. Results The compositions of idiopathic subcapsular fluid were similar to the simple renal cyst. All patients were successful with no complications, no relapse, the average postoperative follow-up time was (36.80 ± 14.20) months. Conclusion Idiopathic subcapsular fluid collection is rare in clinical work, the etiology and pathology mechanism of which are not yet clear, the treatments are mainly to symptoms, microchannel puncture drainage combined with implantation Double J into Ureter were performed under local anesthesia and ultrasound guidance are safe and effective, worth to promotion in clinic.