Band 34, Heft 1

Cerebral palsy (CP) is the most common cause of severe physical disability in childhood. The precise etiological factor for the development of the majority of cases of CP has not been identified, however, prematurity is considered to be the leading identifiable risk factor. During the last decade, intrauterine infection/inflamation has been identified as the most common cause of preterm delivery and neonatal complications. When microorganisms or their products gain access to the fetus they stimulate the production of cytokines and a systemic response termed FIRS (Fetal Inflammatory Response Syndrome). Subsequently, FIRS was implicated as a cause of fetal or neonatal injury that leads to CP and chronic lung disease. Several authors found an increase in the risk for CP in infants born to mothers with clinical chorioamnionitis, especially in preterm neonates. A relationship between CP and intra-amniotic inflammation was demonstrated, intrauterine infection may lead to activation of the cytokine network which in turn can cause white matter brain damage and preterm delivery, as well as the future development of CP. This white matter insult is identified clinically as periventricular leucomalacia (PVL) which is associated with the subsequent development of impaired neurological outcomes of variable severity including CP.

Objective: A sonographically short cervix is a powerful predictor of spontaneous preterm delivery. However, the etiology and optimal management of a patient with a short cervix in the mid-trimester of pregnancy remain uncertain. Microbial invasion of the amniotic cavity (MIAC) and intra-amniotic inflammation are frequently present in patients with spontaneous preterm labor or acute cervical insufficiency. This study was conducted to determine the rate of MIAC and intra-amniotic inflammation in patients with a cervical length <25 mm in the mid-trimester. Study design: A retrospective cohort study was conducted of patients referred to our high risk clinic because of a sonographic short cervix or a history of a previous preterm birth. Amniocenteses were performed for the evaluation of MIAC and for karyotype analysis in patients with a short cervix. Fluid was cultured for aerobic and anaerobic bacteria, as well as genital mycoplasmas. Patients with MIAC were treated with antibiotics selected by their physician. Results: Of 152 patients with a short cervix at 14–24 weeks, 57 had amniotic fluid analysis. The prevalence of MIAC was 9% (5/57). Among these patients, the rate of preterm delivery (<32 weeks) was 40% (2/5). Microorganisms isolated from amniotic fluid included Ureaplasma urealyticum (n=4) and Fusobacterium nucleatum (n=1). Patients with a positive culture for Ureaplasma urealyticum received intravenous Azithromycin. Three patients with Ureaplasma urealyticum had a sterile amniotic fluid culture after treatment, and subsequently delivered at term. The patient with Fusobacterium nucleatum developed clinical chorioamnionitis and was induced. Conclusion : (1) Sub-clinical MIAC was detected in 9% of patients with a sonographically short cervix (<25 mm); and (2) maternal parenteral treatment with antibiotics can eradicate MIAC caused by Ureaplasma urealyticum . This was associated with delivery at term in the three patients whose successful treatment was documented by microbiologic studies.

Aims: To determine the TH-1/TH-2 cytokine pattern in peripheral blood leukocytes (PBL) in late second- and third trimester in normal pregnancies, in comparison to patients with spontaneous preterm delivery (PTD; <37 completed weeks' gestation). Methods: A cross-sectional retrospective study was performed in a tertiary care obstetric unit with healthy non-pregnant women (n=7); healthy pregnant women (n=25); patients (n=25) with preterm labor (defined as uterine contractions or changes in cervical length). The phenotypic analysis of TH-1/TH-2 immune deviation was examined in PBL. Results: 26% PTD (n=13) were recorded. Patients delivering at term (n=37, 74%) were characterized by an upregulation of IL-2, IFN-γ and IL-4 production during weeks 20–25, followed by a strong suppression in cytokine production, except for TGF-β. Towards the end of pregnancy cytokine levels returned to normal as observed in non-pregnant women. In contrast, PTD showed an inverse pattern for IL-2 and IFN-γ with marked suppression in IL-2 and IFN-γ production between weeks 20–25, followed by a strong stimulation of these cytokines. No differences were observed in IL-4 and TGF-β production. Conclusion: An inverse pattern in IL-2 and IFN-γ production in PBLs between weeks 20–30 is seen in PTD as compared to patients delivering at term.

Aim : To compare the perinatal outcome of grand multi-parous women (giving birth for the fifth to ninth time) and pauciparous (parity 2 to 4) women in the region of Flanders, Belgium. Methods : Population-based, retrospective, age-matched study. Results : 2832 grand multiparous women were compared with 2832 pauciparous women. In univariate analysis grand multiparous women showed more transverse lie, macrosomia, and fetal death and had less frequently epidural analgesia and episiotomy. Logistic regression demonstrated that grand multiparity was a significant factor contributing to fetal death and macrosomia. Conclusion : Grand multiparity is associated with fetal death and macrsomia in the region of Flanders, Belgium.

Background : Existing guidelines recommend different strategies to prevent early-onset neonatal GBS sepsis. In 1997, using our own data on incidence and risk factors, we established a new prevention strategy which includes GBS screening at 36 weeks' gestation and intrapartum antibiotic prophylaxis (IAP) in women with positive or unknown GBS colonization with at least one risk factor. The present study evaluates the efficacy of the new prevention strategy. Methods : Retrospective study of the incidence of early-onset GBS sepsis among all live births at the University Women's Hospital Basel between 1997 and 2002. Additional analysis of delivery and post partum period of all GBS sepsis cases, including GBS screening, risk factors during labor (prematurity, rupture of membranes (ROM) <12 h, intrapartum signs of infection), and IAP. Comparison of this group's characteristics G2 (9,385 live births, using the new strategy) with the previous group, G1 (1984–1993, 16,126 live births, without GBS screening or routine IAP) was performed. Results : The incidence of early-onset GBS sepsis was reduced from 1/1000 (G1) to 0.53/1000 (G2). We observed a significant reduction of overall intrapartum riskfactors in cases of GBS sepsis. Conclusion : This study suggests that our new prevention strategy is effective in reducing the incidence of early-onset GBS sepsis in neonates. In comparison, implementation of the CDC's prevention strategy might have prevented 2 additional cases in 9385 live births. However, this would have required treating a much larger number of pregnant women with IAP with consequential increasing costs, side effects and complications.

Objective: The objective of this study was to investigate the feasibility of examining the fetal heart with Tomographic Ultrasound Imaging (TUI) using four-dimensional (4D) volume datasets acquired with spatiotemporal image correlation (STIC). Material and methods: One hundred and ninety-five fetuses underwent 4D ultrasonography (US) of the fetal heart with STIC. Volume datasets were acquired with B-mode (n=195) and color Doppler imaging (CDI) (n=168), and were reviewed offline using TUI, a new display modality that automatically slices 3D/4D volume datasets, providing simultaneous visualization of up to eight parallel planes in a single screen. Visualization rates for standard transverse planes used to examine the fetal heart were calculated and compared for volumes acquired with B-mode or CDI. Diagnoses by TUI were compared to postnatal diagnoses. Results: (1) The four- and five-chamber views and the three-vessel and trachea view were visualized in 97.4% (190/195), 88.2% (172/195), and 79.5% (142/195), respectively, of the volume datasets acquired with B-mode; (2) these views were visualized in 98.2% (165/168), 97.0% (163/168), and 83.6% (145/168), respectively, of the volume datasets acquired with CDI; (3) CDI contributed additional diagnostic information to 12.5% (21/168), 14.2% (24/168) and 10.1% (17/168) of the four- and five-chamber and the three-vessel and trachea views; (4) cardiac anomalies other than isolated ventricular septal defects were identified by TUI in 16 of 195 fetuses (8.2%) and, among these, CDI provided additional diagnostic information in 5 (31.3%); (5) the sensitivity, specificity, positive- and negative-predictive values of TUI to diagnose congenital heart disease in cases where both B-mode and CDI volume datasets were acquired prenatally were 92.9%, 98.8%, 92.9% and 98.8%, respectively. Conclusion: Standard transverse planes commonly used to examine the fetal heart can be automatically displayed with TUI in the majority of fetuses undergoing 4D US with STIC. Due to the retrospective nature of this study, the results should be interpreted with caution and independently confirmed before this methodology is introduced into clinical practice.

Aim: To construct normal standards for fetal neurobehavioral development using longitudinal observations through all trimesters by four-dimensional sonography. Subject and methods: A group of 100 healthy normal singleton pregnancies were recruited for longitudinal 4D US examinations to evaluate fetal neurodevelopmental parameters between 7 to 40 weeks' gestation. Variables of maternal and fetal characteristics including gestational age, eight fetal movements patterns in the first trimester and 14 parameters of fetal movement and fetal facial expression patterns recorded thereafter for the construction of fetal neurological charts. Results: Measurement of 7 parameters in the first trimester and 11 parameters in the second and third trimesters correlated with gestational age (P<0.05). Those parameters have been followed longitudinally through all trimesters and showed increasing frequency of fetal movements during the first trimester. A tendency towards decreased frequency of facial expressions and movement patterns with increasing gestational age from second to third trimesters has been noticed. Conclusion: With 4D sonography, it is possible to quantitatively assess normal neurobehavioral development. There is urgent need for further multicentric studies until a sufficient degree of normative data is available and the predictive validity of the specific relationship between fetal neurobehavior and child developmental outcome is better established.

Objective : To evaluate the stable microbubble test (SMT) ability to select candidates for surfactant prophylaxis for respiratory distress syndrome (RDS). Study design : We followed patients treated according to a new routine for surfactant prophylaxis based on the SMT to determine timing of the initial dose of surfactant, proportion of infants using surfactant, and the predictive value of the SMT. Gastric secretions were collected after birth. Newborns with <25 microbubbles (MB)/mm 2 received prophylactic surfactant. Surfactant was given only after confirmation of RDS (rescue therapy) to newborns with ≥25 MB/mm 2 . Results : Fifty-four (55%) had a low MB count and received prophylactic surfactant. Three out of 44 infants with a high MB count required rescue therapy (negative predictive value 93%; CI:81.3–98.6%). The median interval and interquartile range between surfactant administration and birth in the prophylaxis group was 20 (17–27) minutes. Surfactant was used in 23 of 28 (82%) infants born at <28 weeks of gestation and in 34 of 70 (49%) infants between 28 and 31 weeks. Conclusions : The SMT may be useful to determine surfactant prophylaxis (<30 min after birth). This approach may reduce costs and the number of unnecessary interventions.

Nosocomial sepsis remains an important cause of morbidity in neonatal intensive care units. Central venous catheters (CVCs) and parenteral nutrition (TPN) are major risk factors. In-line filters in the intravenous (IV) administration sets prevent the infusion of particles, which may reduce infectious complications. We randomized infants to in-line filter (for clear fluids and lipid emulsions) or no filter placement. Sepsis, nursing time and costs were assessed. IV sets without filters were changed every 24 h, IV-sets with filters every 96 h. Of 442 infants with a CVC, 228 were randomized to filter placement, 214 to no filter. No differences were found in clinical characteristics, CVC-use, and catheter days. Nosocomial sepsis occurred in 37 (16.2%) infants with filters, in 35 (16.3%) in the group without filter (NS). Nursing time to change the IV-administration sets was 4 min shorter in the filter-group (P<0.05). Costs of materials used were comparable. In conclusion, the incidence of sepsis when using filters was not reduced but the nursing time for changing the intravenous sets was reduced without a difference in costs.

Aims: In order to evaluate the prevalence of human papillomavirus (HPV) in the pregnant population in Japan. Methods: We examined cervical swabs of 1,183 pregnant women for HPV DNA using a PCR-RFLP method during October, 2000 and February, 2001. The overall prevalence of HPV in 1,183 pregnant women was analyzed and stratified by age. Results: The overall prevalence of HPV in pregnant women was 12.5% (148 of 1,183 cases). The prevalence in pregnant women younger than 25 years (22.6%, 28 of 124 cases) was significantly higher compared with that in pregnant women ≥25 years (11.3%, 120 of 1057 cases, P<0.0005). Conclusions: The data indicate a significantly higher prevalence of HPV infection in younger pregnant Japanese women.

Pulmonary agenesis is an uncommon congenital anomaly resulting from failure of pulmonary development beyond the carina. Unilateral lesions constitute 70% of cases; most patients present in the neonatal period with respiratory distress. We report an infant with unilateral pulmonary agenesis and Goldenhar anomalad and review the literature to emphasize that unusually affected infants may have no initial respiratory problems but require delivery in a tertiary unit as they may require thorough investigation because associated anomalies are common. In addition, long term follow up is required.

Complete loss of vision on the delivery suit is a worrying and unusual experience for patients and clinicians. Sudden total blindness, associated with confusion and hemiparesis is even more so, and this is what obtains in Posterior Reversible Leucoencephalopathy Syndrome (PRES). PRES is a recently recognized syndrome characterized clinically by headache, altered mental status, seizures, cortical blindness and other focal neurological signs, with imaging findings of bilateral cortical and subcortical changes on CT and MRI. This syndrome has been reported in a number of clinical conditions characterized by either an acute elevation of blood pressure or treatment with certain drugs. We report a case of cortical blindness, altered mental status and hemiparesis in a 34 year old woman with severe pre-eclampsia complicated by PRES in the puerperium. Abnormalities were demonstrated on CT and MRI with persistent unusual ischemic hyperintensity on T1 weighted MRI imaging thought to correspond with a specific reactive astrocytosis unlike that seen in typical infarction or hemorrhage. It is important for clinicians to be aware of this rare complication of pre-eclampsia, as early recognition will facilitate treatment and prevent permanent neuronal damage.