How did the iv therapy community determine a 7 days for a dressing change protocol for central venous catheters?
Is there evidence that supports that
a) fewer dressing changes reduce the risk of infection
b) 7 daysÂ or greater than 3 days is preferred?
The footnote in the CDC 2002 Catheter Care Guidelines references an abstract by Maki.Â Footnote #65 Maki, Ringer 1987 JAMA.
The conclusion "These data indicate that it is not cost effective to redress perpheral venous catheters at periodic interfals;Â for most patients either sterile guaze or a transparent dressing can be used and left on until the catheter is removed."Â This a good start but does not get to a definitive number of days.
Could it be that 7 days is the maximum one can expect a transparent dressing to remain in place?
I'm asking because several MDsÂ insist on a 3 day dressing change (no gauze).Â
Â I'm looking for evidence to support lengthening the dressing change interval beyond 3 days.