NORCET 2 - 2021 (shif…: Which gas is commonly used in laparoscopic surgery?

NORCET 2 - 2021 (shift-1)

Medical & Surgical Nursing

Easy

Appeared in: NORCET 2 - 2021 (shift-1)

Explanation

Carbon dioxide (CO2) is the standard gas used to create a pneumoperitoneum in laparoscopic procedures.
Its primary advantage is that it is non-flammable, which is a critical safety feature when electrosurgical instruments are used.
CO2 is highly soluble in blood. This property allows it to be rapidly absorbed from the peritoneal cavity and expelled by the respiratory system, significantly reducing the risk of a serious gas embolism if accidental intravascular entry occurs.
It is also inexpensive and readily available in medical-grade form.

Option A: Nitrogen (N2) has very low solubility in blood. If it were to enter the bloodstream, it would not dissolve easily and could form large, persistent gas bubbles, leading to a potentially fatal gas embolism.
Option C: Oxygen (O2) actively supports combustion. Using it as an insufflation gas would create an oxygen-enriched environment within the abdomen, posing an extreme fire and explosion risk with the use of electrocautery or laser devices.
Option D: Hydrogen (H2) is highly flammable and explosive. Its use in a surgical environment with potential ignition sources like electrocautery would be catastrophic.

Clinical Relevance

Nursing practice connection: Knowing Insufflation Gas in Laparoscopic Surgery helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Nurses must closely monitor for signs of hypercarbia (elevated CO2) during and after laparoscopy, including changes in end-tidal CO2, increased heart rate, and hypertension, as these indicate systemic absorption of the insufflation gas.
A key postoperative nursing intervention is managing shoulder tip pain, which is referred pain from diaphragmatic irritation caused by residual CO2. Encouraging early ambulation is a primary strategy to help dissipate the gas.
What if the patient has severe Chronic Obstructive Pulmonary Disease (COPD)? The patient's ability to eliminate excess CO2 is already compromised. The anesthesia team would use the lowest possible insufflation pressures and may need to aggressively manage ventilation to prevent severe respiratory acidosis. In some cases, the procedure might be converted to an open laparotomy if the patient cannot tolerate the physiological changes.

How to Approach the Question

Identify the core concept of the question: the type of gas used for insufflation in laparoscopic surgery.
Recall the key safety principles of the operating room environment. The primary concerns are flammability (due to electrocautery) and patient physiological safety (like gas embolism).
Evaluate each gas option against these safety principles.
Eliminate Oxygen (O2) and Hydrogen (H2) because they are combustible/flammable.
Compare the remaining options, Carbon Dioxide (CO2) and Nitrogen (N2), based on their solubility in blood. High solubility is a crucial safety feature to prevent persistent gas embolism.
Recognize that CO2 is highly soluble, while N2 is not. This makes CO2 the only safe and appropriate choice.

Concept Tested & Keywords

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E6 Gynecology Williams pp. 34-57, 43-69, 17-45