Preliminary report: a clinical appraisal of the McGoldrick rotational vacuum extractor.

The results of a preliminary clinical appraisal of a newly designed vacuum extractor - the McGoldrick rotational vacuum extracter is presented. This instrument is designed to combine the rotation advantages of the various rotating obstetric forceps with the multiple advantages of the conventional vacuum extractor in the management of persistent occipito posterior and occipito transverse positions. The design features include an elliptical shaped cup attached to a series of bars and universal joints which allow both rotational and traction forces to be applied to the foetal scalp.