Duron 1996.

Methods	Patients were randomly assigned to one of two groups. Details of method of randomisation and concealment are not given. Perforation test ‐ gloves placed in labelled bag, tested in a laboratory by filling with water, cuff tied and palm and digit expressed to identify leaks of water.
Participants	Surgeons and scrub nurses. central venous cannulation and insertion of implantable catheters with ports. 92 double outer gloves and 108 indicator outer gloves were collected.
Interventions	Standard double versus indicator system
Outcomes	Number of perforations. Proportion of total number of perforations detected by glove wearer during surgery.
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	B ‐ Unclear