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Scavenging Machine - (Gas Evacuation Apparatus)

Name: Scavenging Machine - (Gas Evacuation Apparatus)
Brand: ConductScience
SKU: RWD-R546Pro
Price: 1299.00 USD
Availability: InStock

$1,299.00

The Scavenging Machine efficiently removes hazardous chemical fumes, odors and waste anesthetic gases (WAGs) vented during the anesthetization processes. in laboratories. With advanced filtration technology and powerful suction, it ensures a safe working environment by capturing and neutralizing volatile compounds. Customizable and easy to use, this system offers tailored solutions for any lab setup.

Key Specifications

mask_capacity

up to 5 masks

alarm_system

two-level alarm with indicator light and buzzer

charcoal_canister

activated charcoal canister required

scavenging_type

active and passive modes available

adjustable_feature

adjustable pull or draw feature

Automation Level

semi-automated

SKU:RWD-R546Pro

Category:Anesthesia & Ventilation

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Director of Science · ConductScience

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Scavenging machines are used in the collection and removal of waste anesthetic gases (WAGs) vented during the anesthetization processes. These systems comprise collection devices, interfaces, and disposal systems. Scavenging machines also help monitor the gases and prevent barotrauma to the subject resulting from a change in incoming and outgoing gas flow (Braz et al., 2020).

Conduct Science offers Scavenging Machines.

Features

Features	Remarks
Ventilator	Removes the need for ventilator hoods during veterinary anesthesia.
Mask capacity	Powerful capture for residual anesthetic from 1 to 5 masks.
Mode Options	Multiple modes: “pull” or “draw” adjustable.
Connection System	Easy to use. Simply connect to your vaporizer system and insert a canister of activated charcoal.
Alarms indicator	Two-level alarm (990g and 1010g), indicator light, and buzzer reminders to change the canister and maintain its effectiveness.
Alarm Function	Alarm function: it has a level one (weight 990g), and level two (1010g) overweight alarm (indicator and buzzer), prompting to replace the filter can in time.
Certificate	Alarm function: it has a level one (weight 990g), and level two (1010g) overweight alarm (indicator and buzzer), prompting to replace the filter can in time.
Pressure Pumping	Negative pressure pumping: The pumping flow is large and the size is adjustable. The adjustment range is 35-60LPM, which can realize the exhaust gas recovery of 1-5 different anesthesia channels.
Noise	Noise reduction system within 50dB. One-click set mute to prevent noise.
Weighting Function	Weighing function: weigh and display the weight of the gas filter tank at any time to confirm whether its adsorption is saturated
Display	A wide range of flow rate-8~60LPM, real-time display through LED screen.
Temperature	An automatic temperature compensation system can help to run stably even at 5°C-40°C.

Introduction

Scavenging machines are used in the collection and removal of waste anesthetic gases (WAGs) vented during the anesthetization processes. These systems comprise collection devices, interfaces, and disposal systems (Lucio et al., 2018). The practice of WAGs scavenging is done to prevent a variety of hazards associated with anesthetic gas pollution of the operating area; this includes risks to personnel resulting from chronic exposure to low levels of some inhalational anesthetics. Scavenging machines also help monitor the gases and prevent barotrauma to the subject resulting from a change in incoming and outgoing gas flow.

Scavenging machines are of two types: active and passive. Active scavenging machines make use of fans or vacuum pumps to create a continuous low pressure in the interface to draw the waste gases into the disposal systems. On the other hand, passive scavenging machines utilize the pressure generated in the breathing circuit to exhaust the gases to the interface. The difference between the two types is that the active systems protect the subject’s airway from suction and build-up of positive pressure while the passive systems protect from the build-up of positive pressure only.

Apparatus and Equipment

ConductScience's anesthesia scavenging machine (size: 21.5 x 21.5 x17.0 cm) eliminates the need for a ventilator hood and provides multiple modes of functions (adjustable pull or draw feature). The system requires a simple connection to the vaporizer system and a canister of activated charcoal. The machine is also equipped with a two-level alarm, an indicator light, and a buzzer reminder, for notification of canister change. The equipment is capable of capturing residual anesthesia of up to 5 masks.

Anesthetic gas scavenging machines comprise a gas collection assembly that contains tubes connected to adjustable pressure limiting (APL) valve and vent relief valve; transfer tubing; scavenging interface; gas disposal tubing, used for carrying gas from interface to disposal assembly; and gas disposal assembly..

The scavenger interface is a critical component of the machine and helps protect the breathing circuit from excessive positive or negative pressure. The scavenger machines can also be distinguished based on the type of interface, which can be either open or closed. The open interface design is often seen in the newer gas machines. These interfaces are open to the room and rely on continuous suction. Closed interfaces, however, make use of valves and are often seen in older machines.

Mode of Operation

The most commonly used scavenging systems are passive scavenging machines. The system takes advantage of the positive pressure of the gas in the anesthetic machine to forward the waste anesthetic gases to the scavenging device. The use of discharge tubing, room ventilation, and activated charcoal adsorption canisters are the commonly found passive configurations in a laboratory setup.

Precautions

It is important to ensure that the system is correctly set-up and tested for leaks. When using face masks to deliver the anesthetics, it is crucial to ensure that the masks are of the correct fit. In the case of using active scavenging machines, it is recommended that either the system is placed under a fume hood, a local exhaust is used, or an active suction to the charcoal canister is installed . While using passive scavenger systems, ensure that each exhaust port, nose cone, and induction chamber, has a dedicated charcoal canister and that the canister is disposed of once it has expired. Use low flow rates and flush the anesthesia system with oxygen before opening the circuit. It is important to note that activated charcoal is ineffective in the removal of nitrous oxide. Regular service of the scavenger machine is also important to ensure its proper functioning (Smith, 2010).

References

Braz, M. G., M. Carvalho, L. I., Chen, Y. O., Blumberg, J. B., Souza, K. M., Arruda, N. M., A. Filho, D. A., Resende, L. O., G. Faria, T. B., Canário, A., Corrêa, C. R., C. Braz, J. R., & Braz, L. G. (2020). High concentrations of waste anesthetic gases induce genetic damage and inflammation in physicians exposed for three years: A cross-sectional study. Indoor Air, 30(3), 512-520. https://doi.org/10.1111/ina.12643

Lucio, L. M. C., Braz, M. G., Nascimento Junior, P. do ., Braz, J. R. C., & Braz, L. G.. (2018). Occupational hazards, DNA damage, and oxidative stress on exposure to waste anesthetic gases. Revista Brasileira De Anestesiologia, 68(1), 33–41.

Smith F. D. (2010). Management of exposure to waste anesthetic gases. AORN journal, 91(4), 482–494.

Manufacturer Source: https://www.rwdstco.com/product-item/gas-evacuation-apparatus/

How It Works

The gas evacuation apparatus operates through negative pressure generation via an internal pump system that creates controlled airflow across anesthesia mask interfaces. Waste anesthetic gases are drawn through collection tubing into the main unit where they pass through activated charcoal canisters. The charcoal's high surface area and porous structure provide adsorption sites for volatile anesthetic molecules through van der Waals forces and physical entrapment.

Flow control is achieved through adjustable pumping mechanisms that regulate suction pressure between 35-60 LPM. The system can operate in active mode with continuous negative pressure or passive mode relying on breathing circuit pressure differentials. A precision scale mechanism continuously monitors charcoal canister weight, triggering electronic alarms when saturation thresholds are approached.

The dual-level alarm system provides progressive warnings at 990g (level 1) and 1010g (level 2) canister weights. Visual LED indicators and audible buzzers alert operators to impending filter saturation before breakthrough of unscavenged anesthetic vapors occurs.

Features & Benefits

Multi-mask capacity up to 5 units

Enables simultaneous scavenging from multiple anesthesia stations in high-throughput surgical suites

Adjustable flow rate 35-60 LPM

Provides customizable suction power to match varying anesthetic delivery volumes and breathing patterns

Dual-level weight-based alarms

Prevents charcoal breakthrough with progressive warnings at 990g and 1010g saturation levels

Active and passive scavenging modes

Accommodates different anesthesia circuit designs and procedural flow requirements

Activated charcoal filtration

Efficiently adsorbs volatile anesthetic compounds including isoflurane, sevoflurane, and halothane

Compact 21.5 × 21.5 × 17.0 cm footprint

Integrates into space-constrained surgical areas without disrupting existing equipment layouts

Visual and audible alarm indicators

Ensures immediate operator awareness of required maintenance actions during procedures

Noise reduction system <50 dB

Minimizes acoustic interference with animal monitoring equipment and communication systems

Feature	This Product	Typical Alternative	Advantage
Multi-mask Capacity	Supports up to 5 anesthesia masks simultaneously	Entry-level units typically handle 1-2 masks maximum	Enables efficient waste gas management in high-throughput surgical suites without requiring multiple scavenging units.
Flow Rate Adjustability	Adjustable 35-60 LPM pumping range	Fixed flow rate systems offer limited customization	Allows optimization for different anesthetic delivery rates and breathing patterns across various procedures.
Canister Monitoring	Dual-level weight-based alarm system (990g/1010g)	Visual inspection or single-threshold indicators are common	Provides progressive saturation warnings preventing breakthrough while maximizing charcoal utilization efficiency.
Operating Modes	Active and passive scavenging modes available	Single-mode operation limits versatility	Accommodates different anesthesia circuit designs and varying procedural flow requirements.
Noise Control	Integrated noise reduction system <50 dB	Higher noise levels often interfere with sensitive procedures	Minimizes acoustic disruption to animal monitoring equipment and reduces stress responses during surgery.
Compact Design	21.5 × 21.5 × 17.0 cm footprint	Larger units require more surgical area space	Fits into space-constrained surgical environments without disrupting existing equipment arrangements.

The RWD-R546Pro offers multi-mask capability with adjustable flow control and progressive alarm monitoring in a compact design. The dual-mode operation and weight-based canister monitoring provide operational flexibility and maintenance optimization for research animal facilities.