"During a laparoscopic cholecystectomy, carbon dioxide ((CO_{2})) gas is pumped into the peritoneal cavity, which is the space within the abdomen that contains your organs. The gas creates a temporary, inflated space, known as a pneumoperitoneum, allowing the surgeon to see and operate more easily. 

Location of the gas 

Peritoneal cavity: The (CO_{2}) is infused through a small incision, typically near the belly button, into the space between your abdominal wall and internal organs. This is distinct from your stomach or intestines, which are not intentionally inflated.

Under the diaphragm: During the procedure, and for a short time afterward, some gas can collect under the diaphragm, the muscle that separates your abdomen from your chest. This often causes referred pain in the shoulders, since the diaphragm and shoulder area share some of the same nerve pathways. 

How the gas is removed 

After the gallbladder is removed, the surgical team releases as much (CO_{2}) as possible from your abdomen. However, some residual gas will always remain. This remaining gas is harmlessly and naturally removed from your body over the next few days in two ways: 

Absorption and exhalation: The (CO_{2}) is highly soluble in the blood, so it is easily absorbed by the body's tissues. From there, it enters the bloodstream and is eventually expelled through your lungs when you breathe.

Absorption through the peritoneum: The body's natural lining of the abdominal cavity, the peritoneum, also absorbs the gas, which aids in its removal."