Table 5.

Procedure groups with limited evidence (<10 sources)

Procedure group	Aerosol source (if procedures aerosol-generating or possibly aerosol-generating)	N of sources mentioning procedures in this group	n (%) of sources that classified procedures in this group as aerosol-generating	n (%) of sources that classified procedures in this group as possibly aerosol-generating	n (%) of sources that classified procedures in this group as not aerosol-generating
ENT and neurosurgery	Wound/invasive procedure	3	3 (100)	0 (0)	0 (0)
GI endoscopy (not further specified)	GI (not further specified)	2	2 (100)	0 (0)	0 (0)
Intra/extra pulmonary high-frequency oscillation devices	Tracheobronchial	3	2 (67)	1 (33)	0 (0)
Toilet use and flushing	Cleaning tasks	2	2 (100)	0 (0)	0 (0)
Vacuum cleaning	Cleaning tasks	2	2 (100)	0 (0)	0 (0)
Supraglottic airways	Tracheobronchial	1	1 (100)	0 (0)	0 (0)
Handling soiled laundry	Cleaning tasks	6	5 (83)	0 (0)	1 (17)
Prone positioning	Tracheobronchial	5	4 (80)	0 (0)	1 (20)
Mechanical insufflation and exsufflation	Tracheobronchial	4	3 (75)	1 (25)	0 (0)
Manipulation of masks	Oronasal	8	5 (63)	0 (0)	3 (37)
Lung function testing	Tracheobronchial	7	4 (57)	2 (29)	1 (14)
Suction of body fluids (not further specified)	Patient care	6	3 (50)	2 (33)	1 (17)
Colonoscopy	Lower GI	2	1 (50)	0 (0)	1 (50)
Nasogastric tube insertion	Oronasal	9	4 (44)	1 (11)	4 (44)
Nitrous oxide (Entonox) administration	–	2	0 (0)	0 (0)	2 (100)
Labour and delivery	–	1	0 (0)	0 (0)	1 (100)

Percentages were rounded to the nearest full percentage point. Totals may therefore not equal 100% exactly.

ENT, ear, nose and throat; GI, gastrointestinal.