Once diapers and their materials have successfully passed thought the rigorous safety review process, they may be evaluated in clinical studies. Depending on how significantly different a material change is or how different a new diaper design is, clinical testing may be used to confirm complete compatibility with baby’s skin. These studies involve babies wearing diapers for defined periods of time followed by measurements and evaluation of the skin. Investigators look at skin wetness/dryness and skin pH.
Over the years, a large number of studies have looked at diaper rash in particular. These studies can last upwards of several months with regular rash gradings done by trained skin graders. These studies, which have included many tens of thousands of babies, have built a very large data base to confirm the safety of disposable diapers.
An absolutely critical element of the overall product safety program is the monitoring of health- and safety-related comments received from parents and caregivers. Each company maintains systems to compile and respond to these comments. Global databases offer companies the ability to analyze trends and quickly identify possible product improvement opportunities.