Pregnancy Outcomes in Women With Percutaneous Nephrostomy Tube Placement for Renal Colic [32N

Abstract

INTRODUCTION: Maternal and fetal outcomes in pregnant patients undergoing treatment of renal colic with percutaneous nephrostomy tubes (PCN) have not previously been described. We undertook this study to evaluate pregnancy outcomes in patients who had nephrostomy tubes placement during pregnancy. METHODS: Following IRB approval, we retrospectively identified women who had nephrostomy tubes placed during pregnancy at a single tertiary care center. Data were collected from maternal and newborn charts. Descriptive statistics were utilized to characterize pregnancy outcomes. RESULTS: During the study period (2014–2018), 41 patients underwent placement of nephrostomy tubes during pregnancy, however maternal and neonatal outcomes were available for only 13 patients. Median gestational age at PCN placement was 28.2 weeks. Prior to PCN placement, renal stones were identified on imaging in 53% of patients and median creatinine was 0.6 (range 0.44–1.06). Urinary tract infection (positive urine culture) was identified in 46% of patients. Median number of hospital days during pregnancy was 9 (range 3–19 days). 31% of patients delivered prior to 37 weeks (median 37, range 32w6d-40w4d). A total of 5 (38%) infants required NICU admission and 2 (15%) were diagnosed with neonatal abstinence syndrome (NAS). CONCLUSION: Although limited by follow up data, this is the largest case series to date describing PCN in pregnancy. The underlying renal disease necessitating PCN is associated with prolonged hospital stays, NICU admission, and treatment for NAS. Given these findings, our group is planning to conduct prospective studies to characterize pregnancy outcomes in women with symptomatic renal colic during pregnancy.