Suction System for radioactive gas capture Articulated arm for aerosol and gas

This articulated extraction arm is designed to capture residues of aerosols labelled with 99mTc or 133Xe used during pulmonary ventilation scintigraphy examinations. During these examinations, the patient’s inhalation of the radiopharmaceutical may result in the release of radioactive aerosols or gases that could be dispersed into the environment. Controlling these releases is a major challenge in terms of staff radiation protection, environmental safety and regulatory compliance.

Designed to capture radioactive residues as close as possible to the source, this articulated suction arm effectively limits the spread of labelled aerosols when the radiopharmaceutical is inhaled. It thus helps to reduce the exposure of healthcare staff and to maintain a safe, controlled working environment that complies with current standards.

With a reach of 1.50 m and three axes of rotation, the suction arm offers great freedom of movement. It allows the operator to easily reach the patient, regardless of their position – whether sitting or lying down – without any strain on the operator.

This approach ensures the device integrates seamlessly, without compromising on performance or ergonomics. The diameter of the tube (75 mm) and that of the required exhaust duct (125 mm) are optimised to ensure efficient and controlled air flow.
The large, transparent PMMA hood is positioned over the patient’s face to extract any radioactive particles that may escape from their nose or mouth whilst they are inhaling the radiopharmaceutical orally. It also facilitates visual monitoring of the nose clip and the correct positioning of the mouthpiece throughout the procedure. To suit all types of premises or ventilation rooms, a wall-mounted or ceiling-mounted connection is provided, as required.

The arm is fitted, at the wall-mounted console, with a motor and a fan featuring a variable-speed extraction system equipped with an activated carbon filter to trap radioactive residues and prevent their spread within the ward or contamination of healthcare staff. It is also possible to adjust the extraction flow rate whilst in use via the control button located on the extraction arm.

Adaptable to the specific requirements of each installation, the extraction system can be fitted with a wall or ceiling connection and is sized according to the height of the suspended ceiling, the type of substrate (concrete, plaster, etc.) and the method of connection to the existing ventilation system.

In nuclear medicine, the monitoring and control of atmospheric emissions are key regulatory requirements. The extraction system fully meets these requirements by providing a reliable, high-performance and sustainable solution for the management of radioactive gases and aerosols.