Argon Gas Delivery System
This Argon Gas Delivery System course will teach you:
How to use the Argon Gas Delivery System, how to connect it to the electrosurgical unit and how to set up the gas tanks.
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Step by step
Characteristics of argon
The Valleylab argon gas delivery system is used to achieve argon plasma coagulation. Argon is a chemically inert gas, meaning that it is not chemically reactive and is not flammable.
In addition, argon has a low breakdown voltage, meaning that the voltage required to make the gas conductive is relatively low.
Therefore, when the voltage applied to the gas is sufficiently high, argon gas is ionized and becomes a conductive plasma.
Within this plasma, electric arcs are formed through which current can flow. As a result, argon is safe to use and relatively conductive compared to gases that are normally present at the surgical site.
Argon in electrosurgery
In electrosurgery, argon gas is used with non-contact monopolar electrosurgery.
Here, a beam of argon gas flows from the tip of the active monopolar electrode towards the patient tissue.
For this, the active monopolar electrode should be held between approximately 3 and 15 mm away from the tissue.
Upon activation, the high voltage at the electrode tip continuously ionizes the argon gas flowing past it and thus creates a conductive plasma.
This conductive plasma now allows electrical sparking to the tissue and coagulation to occur.
This is known as argon plasma coagulation (APC), and can be used in both open and endoscopic procedures.
Due to the relatively conductive argon plasma, tissue effects can be obtained with less power compared to regular coagulation.
This also increases the predictability of the tissue effects of APC, and both coagulation and devitilization effects can be achieved with minimal carbonization.
The penetration depth of APC is relatively controllable, and is often limited to around 3 mm.
Thus, the chance of tissue perforation can be reduced.
Both the reduced power and risk of tissue perforation make APC suitable for endoscopic procedures.
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