The clinical utility of routine postoperative hemoglobin and creatinine after reconstructive surgery for apical pelvic organ prolapse.

[INTRODUCTION AND HYPOTHESIS] Postoperative laboratory tests are routinely ordered after apical prolapse repair on asymptomatic patients. We hypothesize that routine serum hemoglobin (Hb) and creatinine (Cr) have limited clinical utility in the postoperative period in asymptomatic patients.

[METHODS] This is a retrospective cohort study of patients who underwent surgical repair of apical prolapse between 2017 and 2019 at our institution. Subjects were divided into two groups postoperatively: symptomatic and asymptomatic anemia. Symptomatic patients were defined as having one or more of the following: blood pressure (BP) <90/60, heart rate (HR) >100, urine output <30 cc/h, subjective dizziness, flank pain, or abdominal pain. The primary aim was to evaluate the utility of postoperative serum Hb and Cr in symptomatic and asymptomatic patients. Fisher's exact and Mann-Whitney tests analyzed categorical and continuous data respectively. A total of 325 patients were included.

[RESULTS] Patients with symptomatic anemia had a larger decrease in Hb on postoperative day 1 (POD1) with a mean decrease of -18.11% (± 6.64) compared with asymptomatic patients, who had a mean difference of -15.49% (± 5.63; p < 0.001). The total cost of tests evaluating Hb was US$61,745. Patients with symptomatic acute kidney injury had an increase in Cr on POD1 compared with asymptomatic patients, with a mean increase of 0.23% (± 16.06) and -3.07% (± 13.10) respectively (p < 0.05). The total cost of tests including Cr was US$131,812.

[CONCLUSIONS] Our results indicate that routine postoperative Hb and Cr testing for apical prolapse should be reserved for symptomatic patients as it has minimal clinical value in asymptomatic patients and contributes to increased overall health care cost.