Table 2.

Details of co-interventions.

Co-intervention	Verbatim intervention description details
Bladder care	‘The bladder was emptied before application of the vacuum cup…’ [44]
	‘…the bladder was catheterised.’ [46]
	‘…the bladder was emptied before application of the cup.’ [30]
	‘…bladder empty.’ [33]
	‘…empty bladder.’ [27]
Maternal position	‘…placed in the dorsal lithotomy position with left lateral tilt.’ [29]
	‘The patient was put in the lithotomy position…’ [46]
	‘Position woman in lithotomy position.’ [27]
Analgesia	‘Continuous epidural anaesthesia…was provided to all patients after they entered the active phase of labour …’ [56]
	‘All patients received left lateral perineal infiltration with 20 ml 1% lidocaine.’ [44]
	‘The perineum was infiltrated with lignocaine 1%…’ [46]
	“Provide adequate analgesia according to facility procedures.’ [27]