Since delivering the head is the hard part, not sure how often this device would help. If the head is stuck in the birth canal, how do you slip the bag over it to inflate?
Got to admit not familiar with the device. Just know from my previous experience that these situations are the stuff of nightmares.
Thanks.
I did not remember that this had been used in so few cases. And I understand your description of the issue of difficult births.
I have no medical experience with this problem. But on livestock I do. Have pulled a lot of calves. Not a job I like, and results are not always predictable. But calves are pulled breech, which gives a way to assist, chain on the back legs.
And I think the bag is inserted before the head is in the birth canal. This is not the emergency procedure. but remember this is still apparently experimental.
Odon childbirth device: Car mechanic uncorks a revolution
http://www.bbc.co.uk/news/magazine-25137800
This article has better illustration of the problem and the method.