Hospitals want to disable the device, authorities have found, is conducive to the spread of the virus

!---- a recent study published in the journal Anaesthesia found that the use of a specific aerosol shield (see figure below) significantly increases the spread of virus suspended particles in the air compared to other devices and completely without using themthe researchers explain that when aerosol isolation covers are used, suspended particles in the air can soar when a patient coughsthey believe the suspended particles are "spilling in and out of the arm hole" in the isolation coverthe study was carried out by Dr Peter Chan, DrJoanna Simpson, of The Eastern Health Hospital in Melbourne, Australia, and their colleagues in the intensive care and anesthesia departmentresearchers point out that front-line health care workers are exposed to the virus and their lives are at great risk, sparking a "competition" to design aerosol isolation devices, including new types of protective gear and isolation devices used when patients are intubatedaerosol isolation cover has been advertised as a quick and simple device to protect front-line medical staff, and civil society and industry have stepped up the production of such devices in order to support the work of health care workersbut the researchers cautioned that there was "no evidence" of the effectiveness of such devicesthe study notes that "in order to provide protection to health care workers during trachea intubation in suspected and confirmed patients with new crown pneumonia - especially in the face of a shortage of (personal protective equipment) , manufacturers are scrambling to produce reusable isolation devices, which have led the scientific community and social media to "promote" a variety of new devices, but in fact the role of these devices is to isolate the suspended particles that the patient exhales and may cause infection."researchers say the medical community is increasingly concerned about their useAs part of the study,researchers, in collaboration with ascent Vision Technologies, a Melbourne-based engineering company, tested the effectiveness of different aerosol isolation devices, including aerosol isolation coverstrial was conducted in the independent intensive care unit at Box Hill Hospital in Melbourne, involving four male volunteers and three female volunteers who took turns playing the patients who were intubated and the paramedics who were intubatedexperiments simulate the process by which health care workers are exposed to suspended particles in diameter of 0.3 to 0.5 microns without intervention using five different isolation devices, including aerosol isolation coversvolunteers who play the patient hold a bottle of liquid and place it under their mouths, coughing every 30 seconds to simulate the process of producing suspended particlesthe process lasted five minutes, during which the researchers used a detector to measure the number of particles of different sizes and the extent of their diffusionresulted in a total of 42 sets of experimental data results showed that during the five-minute process, the diffusion range of different sizes of suspended particles increased when the atomized isolation shield was used compared to those without the use of an intervention device researchers said that assuming that patients with neo-coronary pneumonia and volunteers were acting exactly the same, the results showed that the aerosol shield actually increased the exposure of health care workers to viral suspended particles, with gaps of up to five times or more in some cases Commenting on their findings, said: "We are also surprised that when the aerosol isolation shield is used, the environment is significantly more polluted by suspended particles than other devices and not using them." " when a patient coughs, we clearly observe a sharp increase in suspended particles in the environment we think that this indicates that the suspended particles have spilled from the arm in and out of the aerosol cage ," the researchers said the study, "the aerosol isolation hoods we tested, where many similar devices are put into use around the world, are almost ineffective in controlling the spread of aerosols, and instead they can increase the spread of airborne particulates." "We have stopped using aerosol isolation during the intubation process," they added at the same time, Peter Chan said that if such devices were sold on the market and regulated, "they would most likely need to be recalled immediately because of the risk of infection that could expose health care workers." but unfortunately, because these devices are donated and not regulated, health care workers may think they are protected accordingly, but in fact they are exposed to a larger area of the new coronavirus " original source: Nursing Times original title: Warning of the rise in Covid-19 exposure nurses using aerosol boxes linmin (compiled) Source: Health World !-- Content Presentation Ends - !-- Determine Whether login ends -