Which gas is used for pneumoperitoneum in case of laparoscopy?

PGIMS Rohtak NO - 2017

Medical Surgical Nursing

Easy

Appeared in: PGIMS Rohtak NO - 2017

Explanation

Carbon dioxide (CO₂) is the universally accepted standard gas for creating a pneumoperitoneum in laparoscopy.
Its primary advantages are that it is non-flammable, which is critical for safety when using electrosurgical instruments, and it is colorless.
CO₂ is highly soluble in blood. This property is a key safety feature, as it minimizes the risk of a life-threatening gas embolism if gas accidentally enters a blood vessel. The absorbed CO₂ is quickly transported to the lungs and exhaled.
Additionally, it is inexpensive and readily available, making it a practical choice for healthcare facilities.

Option B: Oxygen is incorrect because it vigorously supports combustion. Its use would create an extremely high risk of fire or explosion in the presence of electrosurgical devices (e.g., cautery) commonly used during laparoscopy.
Option C: Hydrogen is incorrect because it is a highly flammable and explosive gas, making it absolutely contraindicated for any surgical procedure involving potential ignition sources like electrocautery.
Option D: Nitrous oxide supports combustion, similar to oxygen, posing a fire risk. Furthermore, it is less soluble in blood than CO₂, which increases the duration and severity of a potential gas embolism. It also has a tendency to diffuse into air-filled spaces like the bowel, causing distension that can obscure the surgical field.

Clinical Relevance

Nursing practice connection: Knowing Insufflation gas for laparoscopic surgery helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
During laparoscopy, the nurse and anesthesia provider must monitor the patient for complications of CO₂ insufflation, primarily hypercarbia (elevated blood CO₂) and acidosis. This is done by monitoring end-tidal CO₂ (ETCO₂).
Post-operatively, a key nursing intervention is managing referred shoulder-tip pain. This pain is caused by diaphragmatic irritation from residual CO₂. Encouraging early ambulation and deep breathing exercises helps dissipate the gas and relieve the pain.
Typical insufflation pressures are maintained between 12–15 mmHg in adults to provide adequate space without compromising cardiovascular or respiratory function.

How to Approach the Question

First, identify the core of the question: it asks for the specific gas used for a specific procedure (pneumoperitoneum in laparoscopy).
This is a factual recall question based on standard surgical practice.
Consider the safety requirements for a gas used inside the body with surgical instruments. Key factors are flammability and physiological effects.
Evaluate each option based on these safety principles. Oxygen and nitrous oxide support combustion, and hydrogen is explosive, making them unsafe with electrocautery.
Recall or deduce that Carbon dioxide is non-flammable.
Consider the physiological risk of gas embolism. A highly soluble gas is safer because it dissolves in the blood quickly. CO₂ is known for its high solubility, making it the safest choice among the options.

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