Extensive systematic review evidence is available regarding the
relative merits of vacuum versus forceps delivery, therefore this will
not be considered in detail in this guideline. Overall, vacuum delivery
is associated with reduced maternal trauma compared with forceps,
while the rate of failure is reduced with forceps. Handheld vacuum
devices such as the Kiwi OmniCup have become popular as these
are easy to use, with the attendant able to control the suction. Currently
undergoing testing by WHO and global partners is a new
low-cost device for assisted vaginal delivery: the Odon device
(www.odondevice.org). Constructed of polyethylene film, it may be
easier to use than forceps, with less risk of trauma to the mother
and the fetus. It may be used by any trained healthcare provider.
The device is applied using a simple inserter and works on the principle
of friction reduction.