Patients with gallstones are also at risk of the stones falling out of the gallbladder and into the abdomen if the surgeon intentionally or unintentionally opens up the gallbladder during the procedure. The pancreas sits behind the stomach and produces enzymes that aid digestion. According to MedlinePlus, some patients may develop breathing or heart problems including cardiac arrest during or after surgery. Anesthesia can also increase the risk of developing blood clots in the legs or lungs. Rarely, allergic reactions…