Intraovarian migration of the intrauterine device; complicated by haemorrhagic ovarian cyst

Intraovarian migration of the intrauterine device is a rare situation. We report a case of uterine perforation by an IUD that resulted in a haemorrhagic ovarian cyst in a 26-year-old multiparous woman. The diagnosis was suspected in the face of intense pelvic pain occurring 11 days after IUD insertion and confirmed by ultrasound. The treatment consisted of a laparotomy allowing the extraction of the IUD, the closure of the uterine breach and a cystectomy

Vibratory stress relief - an investigation of the torsional stress effect in welded shafts

In this study the effect of torsional vibration on residual stresses was investigated. Three types of shaft specimen were processed, namely (a) a homogeneous shaft, (b) a shaft welded on a circumferential line and (c) a spot-welded shaft. The first two types of shaft showed some redistribution in the residual stresses under applied torsional loads. On the spot-welded shafts the residual stresses were found to decrease significantly at a very low level of vibration induced stress