DOI: 10.1093/bjs/znad258.749 ISSN:

1252 Body Mass Index (BMI) and Estimated Blood-Loss (EBL) in Patients Undergoing Robot Assisted Radical Prostatectomy (RARP)

C O Connor, A Msellati, P Collins, M Hegazy, E O Beirne, D Galvin, N Hegarty, S Connolly, G Nason, K O Malley
  • Surgery



Higher BMI is a factor which urologists associate with increased difficulty during RARP. (1) One previous review of 218 patients undergoing RARP found no significant differences in EBL in patients with a higher BMI. (2) The aim of this study was to examine the relationship between BMI and EBL in patients undergoing RARP.


Between April 2019 and March 2022, 155 patients underwent RARP. Demographic and clinical variables were collated including EBL, pre-operative and post-operative haemoglobin checks, need for transfusion, length of stay (LOS) and BMI.

Pearson’s correlation coefficient was calculated to examine the relationship between increasing BMI and blood loss.


The mean age of patient was 62 years (range 45-79). The mean BMI was 27.98 (range 19.4-40). The mean blood loss was 281.2mls (range 50-1000). No patient required a blood transfusion. The mean LOS was 2.4 days (range 1-16). There was a positive correlation between higher BMI and higher blood loss (r = 0.1746, p = 0.0421).


This review found a statistically significant increase in EBL in patients with higher BMI undergoing RARP.

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