Adnexal torsion is defined by the existence of a partial or complete torsion of the ovary and a tubal portion around its vascular pedicle. It is a rare gynecological emergency. We report the case of adnexal torsion on...Adnexal torsion is defined by the existence of a partial or complete torsion of the ovary and a tubal portion around its vascular pedicle. It is a rare gynecological emergency. We report the case of adnexal torsion on a large postpartum ovarian cyst in a 40-year-old patient. The diagnosis was suspected based on clinical and ultrasound signs and confirmed by exploratory laparotomy. The appearance of the cyst was suggestive of a mucinous cystadenoma of the ovary. The treatment was radical by performing an adnexectomy. The surgical piece weighed 5.2 kg. The postoperative course was simple. Anatomopathological examination had not been carried out;the parents had buried the operating piece.展开更多
A mathematical model of an impacting-rub rotor system with bending-torsion coupling was established. It was compared with the model without bending-torsion coupling through the modem nonlinear dynamic theory . It is o...A mathematical model of an impacting-rub rotor system with bending-torsion coupling was established. It was compared with the model without bending-torsion coupling through the modem nonlinear dynamic theory . It is observed that periodical, chaotic, period adding phenomena in them and the two models have a similar bifurcation process in their bifurcation figures . But the influence of bending-torsion on the dynmaic characteristics of the system is not neglected. The results have considerable meanings to analyze and improve the characteristics of an impacting- rub rotor system .展开更多
文摘Adnexal torsion is defined by the existence of a partial or complete torsion of the ovary and a tubal portion around its vascular pedicle. It is a rare gynecological emergency. We report the case of adnexal torsion on a large postpartum ovarian cyst in a 40-year-old patient. The diagnosis was suspected based on clinical and ultrasound signs and confirmed by exploratory laparotomy. The appearance of the cyst was suggestive of a mucinous cystadenoma of the ovary. The treatment was radical by performing an adnexectomy. The surgical piece weighed 5.2 kg. The postoperative course was simple. Anatomopathological examination had not been carried out;the parents had buried the operating piece.
基金the National Natural Science Foundation of China (19990510, 19972051)
文摘A mathematical model of an impacting-rub rotor system with bending-torsion coupling was established. It was compared with the model without bending-torsion coupling through the modem nonlinear dynamic theory . It is observed that periodical, chaotic, period adding phenomena in them and the two models have a similar bifurcation process in their bifurcation figures . But the influence of bending-torsion on the dynmaic characteristics of the system is not neglected. The results have considerable meanings to analyze and improve the characteristics of an impacting- rub rotor system .
