BSY apprises Oppn leaders about steps to contain COVID-19 in Karnataka

The current physical distancing guidelines provided by the World Health Organisation (WHO) and by the US Centers for Disease Control and Prevention (CDC) may not be adequate to curb the coronavirus spread, according to a research which says the gas cloud from a cough or sneeze may help virus particles travel up to 8 metres. The research, published in the Journal of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.

Study author, MIT associate professor Lydia Bourouiba, warned that droplets of all sizes can travel 23 to 27 feet, or 7-8 metres, carrying the pathogen.

According to Bourouiba, the current guidelines are based on "arbitrary" assumptions of droplet size, "overly simplified", and "may limit the effectiveness of the proposed interventions" against the deadly pandemic.

 She explained that the old guidelines assume droplets to be one of two categories, small or large, taking short-range semi-ballistic trajectories when a person exhales, coughs, or sneezes.

However based on more recent discoveries, the MIT scientist said, sneezes and coughs are made of a puff cloud that carries ambient air, transporting within it clusters of droplets of a wide range of sizes.

Bourouiba warned that this puff cloud, with ambient air entrapped in it, can offer the droplets moisture and warmth that can prevent it from evaporation in the outer environment.

"The locally moist and warm atmosphere within the turbulent gas cloud allows the contained droplets to evade evaporation for much longer than occurs with isolated droplets," she said.

"Under these conditions, the lifetime of a droplet could be considerably extended by a factor of up to 1000, from a fraction of a second to minutes," the researcher explained in the study.

The MIT scientist, who has researched the dynamics of coughs and sneezes for years, added that these droplets settle along the trajectory of a cough or sneeze contaminating surfaces, with their residues staying suspended in the air for hours.

"Even when maximum containment policies were enforced, the rapid international spread of COVID-19 suggests that using arbitrary droplet size cutoffs may not accurately reflect what actually occurs with respiratory emissions, possibly contributing to the ineffectiveness of some procedures used to limit the spread of respiratory disease," Bourouiba wrote in the study

Bengaluru, Jul 6: A video clip of a Bengaluru-based doctor urging the follow doctors to return to their duty at a time when medicos are desperately needed to fight against COVID-19 has busted the myth of ‘shortage of beds’ in the hospitals. 

In past few of weeks, dozens of people in Bengaluru have lost their lives after hospital denied them admission citing lack of beds. 

Dr Taha Mateen, Managing Director of HBS Hospital, in an emotional message, appealed to healthcare professionals, including doctors, to help handle the situation better. The video has gone viral on social media.

“I speak from the ICU of HBS Hospital. It’s been a virtual bloodbath. I came in the morning at like 7:30 in the morning and its 12’o’clock midnight right now. Patients are continuously calling me now ‘cause their fathers are breathless, their brothers are breathless and they cannot find a room in Bengaluru and at this time if you see there is one Mr Shiva and me. There is no other doctor willing to work in this hospital,” Dr Mateen says in the video.

Dr Mateen further said, "I have beds, I have oxygen beds, I have ventilators, I have all the equipment. I have another 30 beds like this but I don’t have doctors working here.” He said that there is an urgent need to mobilise healthcare staff.

Sources said the COVID-19 patients at the hospital are left with only five doctors and 12 nurses. Until recently, the HBS Hospital had 20 nurses and 44 doctors on its roll.

According to a report, the hospital is facing huge difficulties in treating patients admitted at Intensive Care Units (ICU). Eight patients with severe respiratory problems are admitted to the hospital and are waiting for their COVID-19 test results.

"We have sufficient beds at the hospital to treat coronavirus patients, but we don't have doctors. And we can't admit more patients as we are left with just five doctors, said Dr Taha Mateen.

"All doctors are on WhatsApp, I request all doctors to come out and perform their duties, Dr Mateen said in a video appeal on WhatsApp, Twitter and Instagram. 

According to Dr Mateen, a COVID-19 patient, who was admitted to COVID care centre at Haj  Bhavan, was abandoned on a road by an ambulance driver. Later, the patient was picked by NGO volunteers. 

"The patient was brought to HBS Hospital at 2 am. He had a very low blood oxygen level. We stabilised his condition. Later, we had to send him home as we don't have enough staff to take care of him. We also sent an oxygen cylinder to his home," a report quoted Dr Mateen as saying.