Doctors fought hard to salvage the genitals of a man who was forced to wear a makeshift chastity device for being unfaithful.

The cheating husband woke up in pain one morning to find his penis being ‘strangulated’ by a metal nut screwed on by his wife as he slept.

He tried in vain to remove it himself before calling for an ambulance which took him to a hospital in the city of Zaporizhia, southern Ukraine.

But even then, the chastity nut was too tough to crack for doctors, so a specialist team of rescuers were brought in.

They used a circular saw to slice it in two, putting the patient at risk by producing sparks.