 What inspired Tydeman to develop his device?
Its sole purpose was to test the effectiveness of a novel device called a Tydeman tube. "There are strong opinions about why it happens and what to do, but very little research evidence," says Tydeman, adding that many of these opinions are contradictory. The Tydeman tube is a gadget intended to make this manoeuvre safer and more effective. Tydeman didn't do much with the idea until 10 years ago when one trainee, who was experiencing real difficulty getting heads out, prompted him to think again about the problem. Between them they came up with a device – the Tydeman tube – to make pushing on the foetus more controlled while simultaneously releasing any vacuum that might be holding it in place.
 A sound
 A mannequin  A sound  An advertisement  A smell