Clinical effect of magnetic compression anastomosis on ureterostenosis after kidney transplantation

[...]treatment with efficacy and feasibility will be necessary to treat ureterostenosis after kidney transplantation. Considering special factors such as magnet and magnetic field, the inclusion criteria of MCA were as follows: (1) The patient was diagnosed with definite ureterostenosis after kidney transplantation that needed pyelostomy for drainage; (2) The length of stenosis segment was ≤2 cm; (3) The patient signed the informed consent form and could cooperate with relevant treatment and reexamination during follow-up. Exclusion criteria: (1) Pregnant or lactating women accompanied with serious organ dysfunction, and patients with a psychological disease or active infection; (2) Patients with implants that might be disturbed by the magnetic field (e.g., cardiac pacemaker, metal denture, and internal fixation for fracture); (3) Patients who had to or might receive magnetic resonance imaging (MRI) in the near future; (4) The stenosis segment was too long (>2 cm), and the attraction between magnets could not meet the requirements for compression anastomosis; (5) The magnets could not be inserted because the diameter of ureter or urethra was excessively small. The study was reviewed and approved by the Ethics Committee of the First Affiliated Hospital of Xi'an Jiaotong University (No.