Urinary retention: a possible complication of unilateral continuous quadratus lumborum analgesia - a case report.

Objective: Continuous quadratus lumborum (QL) analgesia is a new option for proximal femur surgery considered safe and effective. The purpose of this report was to show that we may not be aware of all the possible complications of this technique, and urinary retention may occur even when the block is performed unilaterally.

Case Report: To an obese, intubated, mechanically ventilated, female patient, operated in prone position for removal of a femur tumour, we performed a trans-muscular quadratus lumborum block (TQL).