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Study by Ahmedabad hospital: ‘Several Covid patients admitted in ICU developed acute kidney injury’ – The Indian Express

Written by
Sohini Ghosh
| Ahmedabad |

November 1, 2020 2:03:29 am

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Of the 159 Covid-19 patients in ICU, 22 had ended up with acute kidney injuries. (Representational)

An observational study conducted by an Ahmedabad-based private hospital among 549 Covid-19 patients has found that those admitted in intensive care unit (ICU) often have higher prevalence of comorbidities and a greater predisposition of developing complications, even as age affected the disease course adversely, resulting in poorer outcomes in the elderly.

The study conducted at Ahmedabad’s CIMS Hospital, also found acute kidney injury saw a high prevalence, especially among those admitted at ICU.

Of the 159 Covid-19 patients in ICU, 22 had ended up with acute kidney injuries. Overall, of the 549 patients, 24 had developed acute kidney injury during the course of their hospital stay.

The observational study, published as a pre-print, was aimed at comparing clinical outcomes of Covid-19 patients admitted to ICU with those in a non-ICU setting.

The study also observed that among the admitted patients and those who succumbed to the infection, the number of males was far higher than the number of females. Data of 549 Covid-19 patients admitted at the CIMS Hospital between May 5 and August 10 were analysed for the study. They were chosen from the total of 1,291 patients who were admitted during this period. The sample size was chosen randomly.

Of the 549 patients, 159 were admitted to ICU during the disease course, while 390 had ward admissions.

The paper authored by 13 CIMS Hospital practitioners and funded by Dr Amit Patel of the hospital, who was also the principal investigator, notes that prevalence of comorbidities was “significantly higher in ICU patients as compared to ward patients,” with 53 per cent of the ICU patients comorbid with hypertension compared to 35 per cent of the ward patients with hypertension, and 41.5 per cent of the ICU patients already diagnosed with diabetes against the 26 per cent ward patients with existing diabetes.

Nearly 17 per cent of Covid patients in ICU had underlying cardiac disease, while nearly 7.7 per cent of the ward patients had cardiac disease. Other co-morbidities which saw greater prevalence among ICU patients compared to ward patients include chronic pulmonary disease, chronic liver disease, and chronic kidney disease.

“39.34 % of the total patients reported no major comorbidities and most of them were in non ICU settings,” the study found. All ICU patients had one or more than one comorbidity. The ICU group was found to be older than 65 years of age and associated with comorbidities like hypertension and diabetes, and breathlessness as a major clinical characteristic.

Often, ICU patients ended up with other complications such as acute kidney injury (22), shock (17), sepsis (13) and encephalopathy (8). Compared to global studies from China and Seattle in the USA, complications such as acute kidney injury (AKI) saw a lower incidence in the CIMS study.

According to one of the researchers on the study, Parloop Bhatt, studies from China, Italy and New York suggest that 15-34 per cent patients develop acute kidney infection. However, of the 549 patients’ data studied at CIMS Hospital, 4.37 per cent developed acute kidney disease (24 patients).

“Shock and sepsis/secondary bacterial infection was another complication of ICU patients. At this point, the cause of the sepsis or secondary bacterial infection is difficult to ascertain since its correlation to use of tocilizumab or intubation needs to be determined,” notes the study.

When it comes to treatment protocol, seven of the 159 ICU patients were administered convalescent plasma, of which four died. Bhatt says that this was however not statistically significant because seven is too small a sample size and plasma was administered when all other treatments failed, in the initial months.

Out of the 549 patients, while 502 (91.43%) were discharged after full recovery, the 17 other patients took leave against medical advice (LAMA). Bhatt says, “LAMA can happen due to various reasons, say for example a patient may find that their expenses have increased and wish to be home and thus opt to discharge despite our advice against it. We continue to track them during periodic follow-ups.”

Overall, 5.47% of the patients studied, died. Patients admitted in ICU saw greater fatality rate – 18.24% (29 of the 159 patients). The study also notes 502 patients (92.28 per cent) recovered with an average hospital stay of 8.5 days. “ICU patient’s disease course averaged to 11 days… Ward patients had a shorter disease course,” concludes the study.

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