Postoperative haemorrhage associated with active suction drains in two dogs

This article describes two dogs in which an active suction drain was placed to manage dead space at the surgical site and acute haemorrhage and hypovolaemia occurred postoperatively. In both instances, fluid resuscitation and temporary discontinuation of drainage resulted in resolution of clinical signs. Although the underlying cause of haemorrhage was not definitively identified, the use of low-pressure drainage systems and avoidance of interference with local blood vessels should be considered. This is a previously undocumented complication of active suction drain use in veterinary patients.