目的 探讨3种不同助孕方案在≥40岁妇女体外受精-胚胎移植（IVF-ET）周期中的临床效果。 方法 回顾性分析2010年8月－2012年2月期间，于四川大学华西第二医院生殖中心行IVF-ET助孕、年龄≥40岁妇女共245个周期的临床资料，排除一侧卵巢缺如患者3例，余242个周期根据助孕方案不同分为3组：拮抗剂组（GnRH-A方案组）44个周期、长方案组109个周期及短方案组89个周期，比较3种方式助孕的临床效果。 结果 3组均无早发黄体生成素峰；长方案组应用促性腺激素（Gn）的时间最长，应用Gn数量最多，获得最高的获卵数及获胚数（P＜0.05）；3组的受精率、优胚率、冷冻胚胎数、周期取消率、卵巢过度刺激综合征发生率、早期流产率均无统计学意义（P＞0.05），短方案组的种植率及临床妊娠率最低（P＜0.05）。 结论 GnRH-a长方案在≥40岁妇女的IVF-ET周期中具有较好的临床结局，在≥40岁妇女IVF-ET周期中具有与长方案相似的结局，并且可以减少Gn使用量，提高卵泡及胚胎质量，短方案组对≥40岁妇女临床效果较差。
ObjectiveTo investigate the influence of misplaced subclavian vein (SCV) catheter into the ipsilateral internal jugular vein (IJV) on transpulmonary thermodilution (TPTD) measurements and explore the possible mechanisms preliminarily.MethodsIn this prospective study, 408 patients in whom an SCV catheterization was indicated for TPTD monitoring were enrolled. A first set of TPTD measurements was collected at baseline in all patients (group 1, SCV catheters were correctly placed; group 2, SCV catheters were misplaced into the ipsilateral IJV). The parameters included mean transit time (MTt), downslope time (DSt), cardiac index (CI), global end-diastolic volume index (GEDVI) and extra-vascular lung water index (EVLWI). A second set of TPTD measurements was performed only in those with catheter misplacement immediately after the misplaced SCV catheters being corrected (Group 3). The differences in MTt, DSt, GEDVI and EVLWI between group 2 and 3 were recorded as ΔMTt, ΔDSt, ΔGEDVI and ΔEVLWI, respectively.ResultsGEDVI and EVLWI were significantly higher (all P<0.001) in group 2 than those in group 1, while CI was not significantly different (P>0.05) between these two groups. Multivariate logistic regression identified PaO2/FiO2 [adjusted odds ratio (OR) 1.492/10 mm Hg; 95% confidence interval (CI), 1.180 - 1.884; P<0.001], GEDVI (OR=1.307/10 mL/m2, 95% CI 1.131 - 1.511; P<0.001) and EVLWI (OR=3.05; 95%CI 1.593 - 5.840; P<0.001) as the 3 independent factors associated with the misplacement of SCV catheter into the ipsilateral IJV. In group 2, GEDVI [(1041±122)mL/m2 vs. (790±102)mL/m2, P<0.001], EVLWI [(20.3±4.0)mL/kg vs. (10.3±2.3)mL/kg, P<0.001], CI [(3.6±1.2)L·min–1·m–2 vs. (2.9±1.0)L·min–1·m–2, P<0.001], MTt [(38.2±13.3)s vs. (30.8±9.4)s, P<0.001] and DSt [(18.9±7.2)s vs. (13.2±4.9)s, P<0.001)] were significantly higher than those in Group 3. Multiple regression analysis demonstrated that ΔEVLWI (R2=0.86, P<0.001) was negatively correlated with ΔMTt (coefficient±SE, –0.52±0.12; P<0.001) and positively correlated with ΔDSt (coefficient±SE, 1.45±0.17; P<0.001).ConclusionsDuring TPTD measurements, indicator injection through an SCV catheter misplaced into the ipsilateral IJV results in an overestimation of CI, GEDVI and EVLWI. The increase in DSt might be a key factor in explaining the overestimation of EVLWI in patients with misplaced SCV catheters. Given that the accurate measurements of GEDVI and EVLWI are of utmost importance for guiding resuscitation and decision-making regarding fluids administration, immediate repositioning is required if a misplacement is suspected and confirmed by the chest X-ray.