The use of metal vacuum may often cause abrasions of the scalp or suggillation since the limited area over which the instrument is fit, is pressed by the difference in pressure between the marked sites.
The use of metal vacuum may often cause abrasions of the scalp or suggillation since the limited area over which the instrument is fit, is pressed by the difference in pressure between the marked sites.
The silicon vacuum cap can easily fit even in the presence of caput succedaneum It involves no risk of cephalohematoma because a slight difference between the internal and external pressures at the marked sites is dispersed over a wide area onto which the cup is fitted.
Metal cup has a disadvantage of being not usable when Caput succedaneum is present. The silicon cup can produce expulsive force in a more natural way, enabling the simultaneous performance of rotation and traction.
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