Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

93 questions · 93 findings · 48 reviews

No studies found 24 · 25.8%GRADE not reported 12 · 12.9%Very low 31 · 33.3%Low 18 · 19.4%Moderate 5 · 5.4%High 3 · 3.2%

Helium vs carbon dioxide

Pneumoperitoneum‐related serious adverse events · people undergoing laparoscopic general abdominal or gynaecological pelvic surgery under general anaesthesia

It is very uncertain whether helium changes pneumoperitoneum‐related serious adverse events compared with carbon dioxide (very low certainty).

1 finding from 1 review

Any antimicrobial mouthwash and/or nasal spray (alone or in combination), at any concentration, delivered to the patient or HCW before and/or after an AGP vs No treatment or saline or water

Changes in microbiome in oral cavity, nasal cavity, oro- or nasopharynx · Patients without suspected or confirmed COVID-19 infection undergoing aerosol-generating procedures (AGPs), and the healthcare workers…

The review found no eligible studies for this question.

1 finding from 1 review

Any antimicrobial mouthwash and/or nasal spray (alone or in combination), at any concentration, delivered to healthcare workers, with or without the same intervention given to the patients with COVID-19 vs No treatment or saline or water

Other adverse events (allergy, irritation/burning of nasal, oral or oropharyngeal mucosa, long-term staining of mucous membranes or teeth, accidental ingestion) · Healthcare workers (HCWs) treating patients with suspected or confirmed COVID-19 infection

The review found no eligible studies for this question.

1 finding from 1 review

Antimicrobial mouthwash and/or nasal spray (alone or in combination), any concentration, frequency or dosage vs No treatment or saline or water

Other adverse events (allergy, irritation/burning of nasal, oral or oropharyngeal mucosa, long-term staining of mucous membranes or teeth, accidental ingestion) · Patients with suspected or confirmed COVID-19 infection

The review found no eligible studies for this question.

1 finding from 1 review

Any antimicrobial mouthwash and/or nasal spray (alone or in combination), at any concentration, delivered to the patient or HCW before and/or after an AGP vs No treatment or saline or water

Other adverse events (allergy, irritation/burning of nasal, oral or oropharyngeal mucosa, long-term staining of mucous membranes or teeth, accidental ingestion) · Patients without suspected or confirmed COVID-19 infection undergoing aerosol-generating procedures (AGPs), and the healthcare workers…

The review found no eligible studies for this question.

1 finding from 1 review