MSFinals-6568
A sixty-seven-year-old woman on a colorectal surgery ward is recovering from a left hemi-colectomy 5 days previously for a tumour in the descending colon. She is eating and drinking as normal and has been able to mobilise with a walking aid during her physiotherapy sessions.
During the night she complains to the nurse that she is experiencing palpitations and feels very unwell. She has no significant past medical history and no previous surgery prior to this operation. Following her initial assessment, the nurse contacts the foundation year one doctor on call to assess the patient.
On examination:
Heart rate: 124/minute and irregularly irregular; Respiratory rate: 16/minute; Temperature: 38.2 ºC; Blood pressure: 132/82 mmHg; Oxygen saturations levels: 98%; Capillary refill time: <2 seconds. Heart sounds normal. Lungs clear. Abdomen distended. Wound on left flank healing well. No erythema or suppurative exudate. Firm and non-tender. No organomegaly. Kidneys non-ballotable. No pulsatile mass. Bowel sounds absent. No renal bruit. There is feculent material present in the abdominal wound drain. What is the most likely cause of this patient’s symptoms?