There are a number of different objects that can be left behind by a surgeon or surgical assistant, the most common of which are instruments or sponges. Many cases of foreign object retention after surgery occur in the abdomen, vagina and thorax. The risk of having a foreign object left in the body increases when certain scenarios occur, such as:
- Emergencies. If an emergency procedure is required, there may be less chance for optimal organization during the operation. This leaves the opportunity for instruments and sponges to go unaccounted for and forgotten about during the procedure.
- Unexpected complications. If a complication arises during a procedure that the surgical team didn't plan on, it is easy for a surgical implement to be lost in the shuffle and subsequently left behind.
- Surgeries on obese patients. The likelihood of retaining a foreign object following a surgical procedure is increased in any patients who suffer from a very high body mass index (BMI).