Prenatal lead exposure in relation to gestational age and birth weight: A review of epidemiologic studies

Although the adverse effect on pregnancy outcomes at high levels of lead exposure in the workplace has been recognized for years, there is uncertainty regarding the impact of exposure at the lower community exposure levels commonly encountered today. This review summarizes the epidemiologic literature and discusses pertinent methodologic issues and possible sources of interstudy variation. The authors conclude that prenatal lead exposure is unlikely to increase the risk of premature membrane rupture but does appear to increase the risk of preterm delivery. Whether prenatal lead exposure decreases gestational age in terms of infants is unclear. Prenatal lead exposure also appears to be associated with reduced birth weight, but results vary in relation to study design and degree of control for confounding. Adjustment for gestational age, a possible confounder of the birth weight-lead exposure association, did not yield clearer results.     

早产胎膜早破65例妊娠结局分析

目的　探讨早产胎膜早破 (pretermprematureruptureofmembranes ,PPROM)的妊娠结局。方法　对 6 5例PPROM进行回顾性分析。结果　 6 5例PPROM中以流产引产史、感染及胎位不正多见。孕 2 8～ 34+ 6w 与孕35～ 36 + 6wPPROM比较 ,前者剖官产率明显低于后者 (P <0 .0 1) ,而新生儿发病率明显高于后者 (P <0 .0 1)。结论　对孕 2 8～ 34+ 6w 的PPROM宜采用期待疗法 ,以减少新生儿的并发症 ,降低新生儿的发病率及死亡率     

移植肾破裂的处理

目的　提高移植肾破裂的防治水平。方法　 6例移植肾破裂 ,手术前 2例 ,手术后 4例。 2例术前供肾破裂 ,采用切开移植肾破裂处包膜 +裂口内明胶海绵填塞 +肠线修补 +肠线编织肾袋收缩保护移植肾。 1例术后移植肾破裂早期 ,出血少 ,针对顽固性高血压采用“硝普钠”降压 ,配合常规抗排斥药物。 3例术后移植肾破裂出血量估计超过 10 0 0ml者 ,采用手术延长移植肾破裂处包膜 +裂口内明胶海绵填塞 +肠线修补 +肠线编织肾袋收缩保护移植肾。结果　 ( 1)手术前 2例手术后 4例 ,采用切开或者延长移植肾破裂处包膜 +裂口内明胶海绵填塞 +肠线修补 +肠线编织肾袋收缩保护移植肾并配合“硝普钠”降压的方法处理 ,均未再破裂出血 ,移植肾功能恢复良好。 ( 2 ) 1例术后移植肾破裂早期的患者 ,针对顽固性高血压采用“硝普钠”降压 ,配合常规抗排斥药物 ,非手术治疗成功。结论　 ( 1)采用手术切开或延长移植肾破裂处包膜 +裂口内明胶海绵填塞 +肠线修补 +肠线编织肾袋收缩保护移植肾可以有效治疗移植肾破裂。 ( 2 )移植肾破裂出血少的情况下 ,可以在密切观察下非手术治疗     

米非司酮对子宫肌瘤中血管内皮生长因子表达及微血管密度的影响

目的 :探讨子宫肌瘤中血管内皮生长因子 ( VEGF)和微血管密度 ( MVD)的关系及米非司酮治疗子宫肌瘤的机制。方法 :将 40例有症状的子宫肌瘤患者随机分成两组 ,试验组 2 0例 ,于月经周期的分泌早期给予米非司酮治疗 ,剂量为每天 2 5 mg;对照组 2 0例未给任何治疗 ,采用免疫组化的方法对子宫肌瘤中血管内皮生长因子和微血管密度进行半定量的分析。结果 :血管内皮生长因子及微血管密度在子宫肌瘤中有显著的正相关性 ( r=0 .869,P<0 .0 1)。治疗组较对照组血管内皮生长因子及微血管密度均有明显下降 ( P<0 .0 5及 P<0 .0 1)。结论 :子宫肌瘤中血管内皮生长因子与其血管生成关系密切 ,米非司酮通过抑制子宫肌瘤中血管内皮生长因子的表达 ,从而减少肌瘤血液供应 ,抑制其生长 ,改善其临床症状     

宫腔镜诊治围绝经期子宫出血(附138例报告)

目的 :探讨宫腔镜在诊治围绝经期异常子宫出血 (perimenopausaluterinebleeding ,PMUB)的价值。方法 :回顾分析PMUB 138例用宫腔镜诊治的临床资料。结果 :138例中子宫内膜息肉 5 5例 ,子宫颈息肉 2 9例 ,粘膜下子宫肌瘤 4 0例 ,子宫内膜增生过长 6例 ,子宫内膜不典型增生 3例 ,子宫内膜癌 1例 ,正常子宫内膜 4例。总体检查阳性率为 97 10 %。术中 1例发生子宫穿孔并发症。术后随访 2 ～12个月 ,随访率为82 6 1% ,患者症状明显改善 10 6例 ,满意率为 92 98%。结论 :用宫腔镜诊断PMUB有相当高的特异性和准确性。可同时治疗良性病变 ,减少不必要的开腹手术 ,是治疗PMUB的首选方法。     

眼球破裂伤相关因素分析

目的 观察眼球破裂伤的致伤原因、常见部位、视力预后。方法 眼科住院眼球破裂伤51例的回顾性总结分析。结果 眼球破裂伤的首要致伤因素是打架斗殴(占43％)、其次工伤(占20％)、家庭休闲和旅游误伤(占17％)，交通事故(10％)，其他(10％)。眼球破裂伤的常见部位是上方角膜缘(占45％)，颞侧、鼻侧角膜缘和肌止点后巩膜(各占15％)。经过治疗，Ⅰ度破裂伤7／13获得0．02以上视力，Ⅱ度破裂伤9／20保留光感以上视力，Ⅲ度破裂伤1／18保留光感视力。结论 打架斗殴是眼球破裂伤首要致伤因素，常见伤口位置是上方角膜缘，眼球破裂伤的预后和损伤程度密切相关。     

宫腔镜电切术治疗子宫纵隔23例临床分析

目的:探讨子宫纵隔患者接受宫腔镜电切术治疗后的妊娠结局。方法:回顾性分析23例子宫纵隔患者接受宫腔镜下子宫纵隔电切术后的妊娠结局。结果:23例子宫纵隔患者中,子宫完全纵隔5例,不完全纵隔18例,23例均在超声监视下完成手术,平均手术时间25min,平均出血30ml。与术前相比,术后足月活产率从4.35%增至48.83%,流产率从85.55%降至30.43%,具有显著性差异(P<0.01)。结论:宫腔镜电切术治疗子宫纵隔是安全、有效地治疗方法,能显著提高足月活产率,明显降低流产率。     

外伤性脾破裂切脾后及脾组织移植术后免疫功能观察分析

1952～1987年收治158例腹部闭合性损伤单纯脾破裂患者,其中全脾切除135例;脾切除并自体脾组织移植21例,脾破裂缝合修补2例。治愈率为98.1%,死亡率为1.9%。脾移植组及缝合修补组无1例死亡。92例获得免疫功能检验随访观察半年至35年,发现成人切脾后细胞免疫及体液免疫功能无明显影响,也未见脾切除后严重感染发生。认为成人除脾破裂表浅和局限易于修复或部分切除者外,均应行脾切除术,且无需行自体脾组织移植。小儿在脾切除后应行自体脾移植。     

"Endoview" project of intrapartum endoscopy.

INTRODUCTION: The change in obstetrical practices over the last decade in favor of trials of labor in patients with uterine scars has resulted in increased incidences of uterine ruptures. Although neither repeat cesarean delivery nor a trial of labor is risk free, evidence from a large multicenter study shows vaginal birth after the cesarean (VBAC) is associated with shorter hospital stays, fewer postpartum blood transfusions, and a decreased incidence of postpartum maternal fever. The uterine rupture remains the most serious complication associated with VBAC. Factors associated with uterine rupture include excessive exposure to oxytocin, dysfunctional labor, and a history of more than 1 cesarean delivery.2 Because uterine rupture may be a life-threatening event, intrapartum surveillance and the ability to perform an emergency surgery are both necessary when trial of labor is allowed. Until now, no early symptoms pathognomonic to uterine rupture had been described. We share our experiences with the novel approach to the problem - an intrapartum endoscopy. MATERIALS AND METHODS: Endoscopic examination was accomplished by using the intraoperational fiberscope (Olympus and Endoview system (Costa Mesa, CA, USA). A gas-sterilized 25-cm long fiberscope is introduced into the amniotic cavity through the cervical canal after rupture of the membranes. The distance between the fiberscope and the object varies from 3 to 50 mm. The fiberscope has a separate channel for the fluid infusion (normal saline) throughout the procedure; the surgeon looks through the eyepiece directly and exhibits control over the flexible scope. The duration of endoscopy is less than 15 minutes. The inserting of the endoscopic device is very similar to that of insertion of an intrauterine pressure catheter. The IRB Committees of both participating institutions approved the study protocol. Twenty-eight patients with an unknown or poorly documented site of the uterine scar were included in the study. An ultrasound examination had been performed on all patients prior to endoscopy to assess fetal wellbeing and placental location. The ages of the patients ranged from 21 to 38 years. Eighteen women had 1 previous cesarean delivery, and 10 had 2. The performance of intrapartum endoscopy did not interfere with fetal monitoring; 21 fetuses were monitored externally, 7 internally. Indications for previous cesarean deliveries were as follows: fetal distress in 11 cases, failure to progress in labor in 8, placenta previa in 2, and unknown in 7. Twenty-one patients delivered vaginally; 7 had had repeat cesarean deliveries. All neonates were born in satisfactory condition. The Apgar scores at 1 minute varied from 7 to 9 and at 5 minutes from 8 to 10. The integrity of the uterine wall was assessed by manual postpartum uterine exploration in each case of vaginal delivery and by visualization and palpation of the scar site in each abdominal delivery. RESULTS: The lower uterine segment and contractile portion of the anterior uterine wall were visualized successfully in all patients. In 25 patients, the presumed scar site looked totally indistinguishable from the rest of the lower uterine segment and anterior uterine wall. Two scars were identified as vertical in 2 patients who were delivered by a repeat abdominal operation. A vertical scar appears as a groove running in a cephalad-caudad direction from the lower uterine segment into the contractile portion of the anterior uterine wall. The usefulness of the intrapartum endoscopy is best demonstrated by the following case reports (2 of 28 study cases).     

Arterial and pseudoaneurysm ruptures complicating liver transplantation

Ruptures of the hepatic artery and hepatic pseudoaneurysms (PA) are rare but serious complications of hepatic transplantation. We conducted a retrospective study of 640 liver transplantations performed in our institution for a variety of pathologies. After surgery, seven major arterial bleeds occurred (0.9%). Of these seven cases, there were due to hepatic artery rupture (HAr) and four to PA rupture; all confirmed at either surgery (six cases) or autopsy (one case). Five of the seven patients died. In all cases the transplantation was difficult. All vascular injuries but one were caused by sepsis and occurred either after an undetermined cause septicemic syndrome (five cases) or graft dysfunction (one case). The last vascular injury was biliary drainage related. Six of the seven patients had imaging studies. Sonography (five cases) found a sub-hepatic hypoechoic collection in three cases but failed to do so in two. Duplex doppler (three cases) failed in all three cases to demonstrate a PA. Computed tomography (three cases) showed one PA, one perihilar sub-hepatic collection and failed in one. Conventional angiography (three cases) depicted a PA in all three cases. At the present time, our practice is to perform systematic angiography in patients with undetermined cause septicemic syndrome to research a PA. And if angiography is normal, to then puncture systematically any sub-hepatic collection to determine the bacteriological nature of this collection. Correspondence to: H. Caillet