The most common objects left inside a patient are needles and sponges. Sponges, in particular, are difficult to keep track of as they are used to soak up blood during surgery and tend to blend in with the patient’s organs and tissues. These incidences happen most often during abdominal surgery. The most common areas in which surgical objects are left inside a patient are the abdomen, vagina, and the chest cavity. Surgical objects are unintentionally left inside a patient for a number of reasons. Hospitals typically rely on nurses or technicians to keep track of the number of sponges and other surgical tools used during surgery. Human error comes into play as incorrect counts can be made due to fatigue or chaos as a result of a surgical emergency. Several factors can increase the risk that an object may be left behind after surgery. These factors include unexpected changes that occur during surgery, the patient’s body mass index is high, multiple procedures are needed, procedures involving more than one surgical team, and procedures involving greater blood loss. The consequences of having surgical tools left inside a patient’s body vary from harmless to fatal. Patients may go for months or years not realizing that they have foreign surgical objects within their bodies. Sponges and other surgical implements can lead to infection, severe pain, digestive system problems, fever, swelling, internal bleeding, damage to internal organs, obstructions, loss of part of an internal organ, prolonged hospital stays, additional surgery to remove the object or even death.