Medical and research laboratories need to be kept free from any particulate matter that may result in contamination. The working stations need to be kept sterile devoid of any contaminants. Laminar Air Flow Cabinets are utilized in blockage of the invasion of foreign matter and dust particles into the working station thus keeping the place sterile. Parenteral preparation needs to be prepared in very sterile environments to prevent contamination. The Laminar hoods are used in the preparation of parenteral preparation since the devices are capable of dividing the air that flows through it into layers. The air is then got rid of the bacteria and microorganisms contamination. Medical facilities such as hospitals use the laminar flow cabinets to protect patients with the compromised immune system from possible infections.