One possible influence of biofield phenomena is that they may act directly on molecular structures, changing the conformation of molecules in functionally significant ways.Another influence is that they may transfer bioinformation carried by very small energy signals interacting directly with the energy fields of life, which is more recently known as the (Rubik et al, 1994).
Because mercury sphygmomanometers generally adhere to a simple basic design with standard components, it is probably reasonable to assume that most, if not all, mercury sphygmomanometers would be of similar accuracy.
And worse yet, some people erroneously think that if they can fully verify something, the verification has to be 100%.
This approach, unless automated, may be a statistically invalid approach because even manual 100% inspection is statistically not 100% effective.
They include human energy therapies, homeopathy, acupuncture, magnet therapy, bioelectromagnetic therapy, electrodermal therapy, and phototherapy, among others.
Many of these modalities challenge the dominant biomedical paradigm because they cannot be explained by the usual biochemical mechanisms.