Do you worry that your gas evacuation system is out of date or that your employees may be inhaling the gas? Are you thinking of renovating? If so, the following information will help you to choose the best gas evacuation system for your practice.
1. Identifying your needs
Your responses to the questions below will help you to identify your specific needs.
- How many anesthesia machines do you have?
- Do you prefer disposable or long lasting products?
- What is your budget?
- How many hours of surgery do you perform weekly?
- Is there a staff member available to verify the system on a daily basis?
2. Customer Service
This section will help you verify the after sales service offered with the purchase of a gas evacuation system.
- Where is the product manufactured?
- What kind of warranty is offered?
- Who is responsible for the warranty, the manufacturer or the distributor?
- What service is available in case of breakage?
|Model||Charcoal Filter||Passive evacuation system||Gas evacuation blower assembly||Active suction or vacuum pump|
|Type of system||Passive||Passive||Semi-active||Active|
|Type of configuration||Active charcoal||Corrugated tube||Passive scavenger interface||Active scavenger interface|
|Number of machines used with||1||1||1 to 8||Varies with the size of the pump|
|Life span||Max. weight of 50g||10 to 15 years||10 to 15 years||10 to 15 years|
|Verification method||By weighing the filter||By a qualified technician||By a qualified technician||By a qualified technician|
|Warranty||None||None||5 years||1 year|
|Country of manufacture||United States||Canada||Canada||United States or Europe|
|Price||$18.75 to $23.00||$200 to $300||$1500 to $4000||$5000 and more|
|More Info||More Info|
Dispomed recommends that your gas evacuation system be installed by a specialized contractor in order to ensure that the installation conforms to the safety regulations.
In order to help you better analyze the cost of using charcoal filters we offer the following example: A clinic with one anesthesia machine that is used, on average, 15 hours per week will spend an average of between 975$ and 1200$ annually on charcoal filters. (#machines X $$ filter X # filters/year = average annual cost)
Charcoal filters must be weighed daily in order to be sure they have not surpassed the weight limit recommended by the manufacturer. If the filter has achieved maximum capacity it could mean that the gases exhaled by the patient are being inhaled by the employees and the patient.
Passive evacuation system
The passive evacuation system consists of a corrugated tube connected to a gas evacuation valve leading directly to the exterior of the building. This type of system is not recommended if the distance between the anesthesia machine and the outside wall of the building is more than 8’. Since the gas is evacuated by gravity, the animal’s breathing resistance increases as the length of the tube increases. The exterior outlet must be protected from insects that can infiltrate the tube. The outlet must also be protected from turbulent winds that can cause air gas emanations to be pushed back into the tube, thus diluting the gas in the patient circuit.
With this kind of gas evacuation system you must also think about the venturi effect which is a suction that occurs causing a flat bag effect that can make breathing more difficult for the patient.
Gas evacuation blower assembly
A gas evacuation blower assembly is a semi-active system that allows for the halogenated gases/nitrous-oxide used during anesthesia to be evacuated, thus avoiding air pollution in the operating rooms. Together with the scavenger interface the blower assembly is connected to a network of pipes connecting each room with an anesthesia machine. The ventilator evacuates continuously while the scavenger interface controls the air flow level of each anesthesia machine. This system is the most efficient for most clinics and hospitals.
Active suction and vacuum pump active systems
The active suction and vacuum pump active systems are generally used in large centres such as universities, hospitals and pharmaceutical centres. This system consists of one central vacuum pump and a scavenger interface for each anesthesia machine. This system is more expensive than other gas evacuation systems however, depending on the strength of the pump it can be used on up to 100 anesthesia machines.