Purpose: Our aim was to examine the potential of the uterine cavity to affect fertilization and early embryo development.
Design: A prospective IRB-approved protocol for patients fulfilling study eligibility criteria was used.
Methods: Patients studied included those with primary or secondary infertility, aged less than 38 years, with no history of severe
male-factor infertility, and with hysterosalpingogram-and laparoscopic-confirmed bilateral proximal tubal occlusion. Superovulation
induction was accomplished with a combination of GnRH agonist and menotropins, with serum hormonal and sonographic monitoring.
Within 24 hr prior to, and again at the time of, ovulatory hCG administration, progesterone (P4) was given. Sonographic-guided
transvaginal retrieval was performed 35 hr after hCG. Between four and six oocytes were returned to the uterine cavity, admixed
with sperm, immediately following retrieval. Luteal support consisted of daily P4 administration.
Results: Of the 20 patients recruited for the study, all completed the retrieval and transfer procedure. A total of four clinical
pregnancies was achieved, with one early first-trimester loss, one late first-trimester loss (Trisomy 14), and two healthy
term infants delivered. IVF of surplus oocytes demonstrated a 82.5% fertilization rate and 66.7% cleavage following cryopreservation.
Conclusions: Human fertilization can be achieved through direct uterine transfer of gametes. Furthermore, administration of P4 prior to
the ovulatory dose of hCG is compatible with in vitro or in vivo fertilization and implantation. 相似文献
Objective: To evaluate the implantation rate and pregnancy rate (PR) in patients with severe tubal factor infertility who were undergoing IVF. Patients who had undergone salpingectomy were compared with those who had not.
Design: A prospective randomized study.
Setting: A department of obstetrics and gynecology at a university hospital.
Patient(s): Thirty patients who previously had undergone salpingectomy and 30 patients who had not undergone salpingectomy before IVF treatment.
Intervention(s): Laparoscopy with or without salpingectomy followed by IVF with the use of combined GnRH agonist and hMG therapy in a long stimulation protocol.
Main Outcome Measure(s): Embryo implantation rate and ongoing PR per transfer. The cumulative PRs were compared for the two groups of patients.
Result(s): After the first IVF attempt, the implantation rate was 10.4% in the group with salpingectomy and 4.6% in the group without salpingectomy. For all IVF attempts, the respective embryo implantation rates in the two groups were 13.4% and 8.6%. The ongoing PR per transfer was 34.2% in the group with salpingectomy compared with 18.7% in the group without salpingectomy. After four IVF attempts, the probability of becoming pregnant was greater in the group of patients with salpingectomy (75%) than in the group without salpingectomy (63%).
Conclusion(s): Previous salpingectomy in patients with severe tubal factor infertility who are undergoing IVF seems to increase the embryo implantation rate and the PR per cycle of IVF. This monocentric study must be followed by other similar studies to allow for a metaanalysis and confirm this clear trend with definitive evidence. 相似文献
Handling and efficacy of a new video-optical intubation stylet were assessed in a simulated difficult tracheal intubation setting and compared with a conventional malleable stylet. Forty-five anaesthetists performed 10 tracheal intubations using both techniques. Laryngoscopy was performed by the observer, who created a grade 3 view according the classification by Cormack and Lehane. The time taken to place the tracheal tube and the final tracheal tube positions were documented. Mean (SD) intubation time for the video-optical stylet was 20.4 (7.7) s and for the malleable stylet 10.2 (3.3) s (p<0.01). With the video-optical stylet the trachea was correctly intubated in all 225 attempts; with the malleable stylet 44 (19.6%) oesophageal and 44 (19.6%) endobronchial intubations occurred (p<0.01). The video-optical intubation stylet enabled us to recognise inappropriate tracheal tube positions and to correct them immediately. This equipment can be considered a reliable and effective tool for management of the difficult airway. 相似文献
Air medical personnel in the United States have used neuromuscular blocking agents to facilitate endotracheal intubation in the field for more than a decade. This literature review examines 15 studies to investigate their experience and explores the following specific areas: the intubation success rate in patients who did or did not receive these agents, the intubation success rate of air medical personnel before and after they incorporated these agents into their practice, the neuromuscular blocking agents and adjunct medications used by air medical personnel, and the disposition of patients who could not be intubated after an agent was given. The data suggest that, overall, air medical personnel use these agents safely and effectively. Suggestions are offered for future studies, including examining ground time when agents are used to facilitate intubation, complications of their use in this setting, and the use of simulators to train personnel in the administration of these medications. 相似文献