Do isolation gowns really work?
Isolation gowns, along with other personal protective equipment (PPE), have become a ubiquitous sight in hospitals and other healthcare settings since the start of the COVID-19 pandemic. These gowns serve as a barrier between healthcare workers and infectious agents, and are crucial tools in preventing the transmission of disease.
But do isolation gowns really work? In this article, we will delve into the science behind isolation gowns, how they function, and what factors contribute to their effectiveness.
What are isolation gowns?
Isolation gowns are a type of PPE designed to protect healthcare workers from exposure to infectious agents. They are typically made from non-woven material, such as polypropylene, which is a synthetic polymer. Isolation gowns come in various sizes and levels of protection, from reusable cloth gowns to disposable gowns that offer varying degrees of fluid resistance.
Isolation gowns are worn over other PPE, such as gloves and masks, to provide a full-body barrier against infectious agents. They cover the entire torso, including the back, shoulders, and arms. Some gowns feature a full-length zipper on the front, while others are pulled on over the head like a poncho.
How do isolation gowns work?
Isolation gowns work by creating a physical barrier between the wearer and infectious agents. They are designed to prevent bodily fluids, such as blood, saliva, and respiratory secretions, from reaching the skin and clothing of the wearer.
The effectiveness of isolation gowns is determined by their ability to resist penetration by fluids. This is measured using a test called the ASTM F1670 standard test method, which evaluates the resistance of materials to synthetic blood.
Isolation gowns are also evaluated based on their performance in the ASTM F1671 standard test method, which measures the ability of material to resist viral penetration using a bacteriophage virus.
Factors that impact the effectiveness of isolation gowns
Several factors can impact the effectiveness of isolation gowns. These include:
1. Material: Isolation gowns are made from various materials with varying levels of fluid resistance. Polypropylene is a common material used for isolation gowns because it is lightweight, breathable, and offers a high level of fluid resistance.
2. Design: The design of an isolation gown can impact how well it protects the wearer. Gowns with long sleeves that reach the wrists and have elastic cuffs offer better protection than gowns with short sleeves or loose cuffs.
3. Fit: Isolation gowns should fit snugly but comfortably to prevent fluid penetration. Gowns that are too loose or too tight can compromise their effectiveness.
4. Donning and doffing: Proper donning and doffing of isolation gowns is crucial to their effectiveness. Healthcare workers must follow strict protocols for putting on and taking off the gowns to prevent contamination.
The effectiveness of isolation gowns in preventing infection
Several studies have evaluated the effectiveness of isolation gowns in preventing infection. A 2015 systematic review of 10 randomized controlled trials found that the use of gowns reduced the risk of infection among healthcare workers, especially when combined with other PPE.
Another study conducted during the SARS epidemic found that healthcare workers who used gowns and masks were less likely to contract the virus than those who did not use PPE.
A study conducted during the COVID-19 pandemic found that the use of full-body PPE, including isolation gowns, reduced the risk of infection among healthcare workers.
Conclusion
In conclusion, isolation gowns are effective in preventing the transmission of infectious agents when used correctly. Their effectiveness is determined by various factors, including the material, design, fit, and donning and doffing procedures. Proper use of isolation gowns, along with other PPE, is crucial to protecting healthcare workers from infection.
