Maternal and perinatal outcomes in spontaneous versus assisted conception twin pregnancies.

OBJECTIVE: To compare maternal and perinatal outcomes in twin pregnancies conceived via assisted reproductive techniques (ART) compared with spontaneous twin pregnancies. STUDY DESIGN: This retrospective study examined 345 dichorionic, di-amniotic twin pregnancies (207 conceived spontaneously and 138 conceived via ART), delivered between January 2007 and June 2011 at the San Pietro Fatebenefratelli Hospital, Rome, a tertiary medical centre. Maternal and perinatal outcomes were compared. A multiple logistic regression analysis was performed to calculate risk estimates as odds ratios (OR) adjusted for maternal age, parity and systemic diseases. Patient data were obtained from a computerized database and analyzed using Statistical Package for the Social Sciences Version 17. RESULTS: Gestational age and birth weight were lower in the ART group, and preterm delivery, gestational diabetes and placental abruption were higher in the ART group compared with the spontaneous conception group. The incidence rates of respiratory complications, patent ductus arteriosus and admission to the neonatal intensive care unit were higher among ART newborns. Length of hospital stay for mothers and newborns was longer in the ART group. No differences in mode of delivery, Apgar score at 5min, congenital anomalies, perinatal mortality, and other considered pregnancy and neonatal complications were found between the two groups. Multivariate analysis adjusted for maternal age, parity and systemic diseases revealed that only the rates of placental abruption [OR 7.45, 95% confidence interval (CI) 2.05-26.98] and patent ductus arteriosus (OR 3.39, 95% CI 1.01-11.46) were significantly higher for the ART group. CONCLUSIONS: Twin pregnancies conceived via ART are at greater risk of poorer outcomes than spontaneous twin pregnancies. This may be related to the type of conception and specific negative features of subfertile patients undergoing infertility treatment.

Effect of epidural analgesia on operative vaginal birth rate.

The aim of the study was to investigate if epidural analgesia may affect the operative vaginal birth rate. An observational study was carried out on 1,158 in low-risk patients who delivered vaginally; 46.9% of these patients underwent epidural analgesia using different doses and drugs. Overall, epidural analgesia enhanced the probability of vacuum delivery (OR 2.70 95% CI 1.88-3.89, p < 0.001). Vacuum application was increased about seven times by administration of fentanyl alone at the first dose, while it was reduced if ropivacaine was added to fentanyl. In patients undergoing epidural analgesia, increasing the amount of ropivacaine at the first dose reduced the probability of vacuum delivery (OR 0.82; 95% CI 0.67-1.00, p = 0.05). Moreover, increasing the number of top-ups reduced the probability of vacuum delivery (OR 0.49 95% CI 0.27-0.93, p = 0.029) and the time of the second stage of labor. On the other hand, increasing time from the first dose of epidural to the last top-up increased the risk of operative vaginal delivery (OR 1.33 95% CI 1.03-1.72, p = 0.031) and the time of the second stage of labor. Epidural analgesia seems to favor spontaneous delivery when it is properly carried on.

Myomectomy during the first and second trimester of pregnancy.

Myomectomy was performed on five symptomatic women in the first and second trimester of pregnancy who were resistant to medical therapy. All the patients ended theirs pregnancies without complications. Three patients of five (60%) underwent spontaneous delivery while the other two patients (40%) had cesarean section. Myomectomy during pregnancy, when necessary, is proving highly effective today.

Thrombosis associated with a large uterine myoma: case report.

A case of a 49-year-old woman who presented with a large uterine myoma weighing 5000 g and was affected by unilateral deep vein thrombosis of the left leg and pulmonary embolism is presented. After anticoagulant therapy she successfully underwent laparotomic hyterectomy.

[Census 2004 of the Italian renal and dialysis units. Basilicata - Calabria - Puglia]. / Censimento 2004 dei Centri di Nefrologia e Dialisi Italiani. Basilicata - Calabria - Puglia.

The Italian Society of Nephrology (SIN) sponsored in 2004 a National Census of the Italian renal and dialysis units. This paper presents the main structural, technical, organizational features, as well as the human resources and the activities of three South-East regions of Italy: Basilicata (B), Calabria (C), and Puglia (P). EPIDEMIOLOGY: incidence of dialysis patients was 149 per million population (pmp) in B, 134 pmp in C and 172 pmp in P; prevalence of dialysis patients 729, 694 and 886 pmp, respectively; prevalence of transplanted patients 188 in B, 264 in C and 249 pmp in P; gross mortality rate of dialysis patients was 12.7% (B), 12.2% (C) and 10.8% (P). TYPE OF VASCULAR ACCESS IN PREVALENT DIALYSIS PATIENTS: arteriovenous fistula: 83.9% (B), 87.7% (C) and 86.5% (P); central venous catheter: 14.2% (B), 8.4% (C) and 11.2% (P); vascular graft 1.9% (B), 3.9% (C) and 2.3% (P). STRUCTURAL RESOURCES: nephrological beds 37, 34 and 88 pmp, respectively; dialysis stations 265, 209 and 207 pmp. PERSONNEL RESOURCES: renal physicians 45 (B), 67 (C) and 64(P) pmp; renal nurses 189, 190 and 207 pmp; each nephrologist cares for 16 (B), 10 (C) and 14 (P) dialysis patients, whereas each renal nurse takes care of 3.8 (B), 3.7 (C) and 4.3 (P) dialysis patients. ACTIVITY: hospitalizations 1378, 1834 and 3439 pmp, respectively; renal biopsies 40 (B), 64 (C) and 107 (P) pmp. The main goal of this project was to create a reference for benchmarking studies. Therefore, data from the Puglia region were compared to data from other regions with similar population size (such as Piemonte and Emilia-Romagna). Moreover, a Census may became a useful qualitative tool for renal registries: this report compares data from the Census with data collected by the dialysis and transplantation registry of the Puglia region. Generally speaking, prevalence for Basilicata and Calabria is close to the Italian one, whereas incidence is inferior; things are opposite in Puglia. Furthermore, compared to Basilicata, Calabria and Italy on average, the Puglia region shows a significant higher number of in-patient beds and a lower DRG weight. Compared to Piemonte, Emilia Romagna and Italy on average, all the three South-East regions do not show differences in number/pmp of dialysis centres. More physicians (nephrologists = 80%) are reported to be active in Puglia and Calabria, compared to Piemonte and Emilia Romagna. Nurses in Puglia look after a greater number of dialysis patients than in Calabria and Basilicata. The number of renal biopsies/ pmp is similar to the Italian mean only in Puglia; it is inferior in the other two regions. These data highlight many differences among these three South-East regions, as well as among Piemonte, Emilia Romagna and Puglia. A relevant inequality in health care structures and resources has been found and discussed.

Epidemic Venezuelan equine encephalitis in La Guajira, Colombia, 1995.

In 1995, the first Venezuelan equine encephalitis (VEE) outbreak in Colombia in 22 years caused an estimated 75,000 human cases, 3000 with neurologic complications and 300 fatal, in La Guajira State. Of the state's estimated 50,000 equines, 8% may have died. An epizootic IC virus, probably introduced from Venezuela, was rapidly amplified among unvaccinated equines. Record high rainfall, producing high densities of vector Aedes taeniorhynchus, led to extensive epidemic transmission (30% attack rate) in the four affected municipalities. Native Wayuu Indians, constituting 24% of the state's population, were at increased risk of infection (risk ratio, 3.3; 95% confidence interval, 2.2-5.3). Epidemiologic studies found no evidence of human-to-human transmission. A higher-than-expected number of abortions during the outbreak confirmed a previously suspected abortifacient role of VEE infection. Pesticide applications and a mass equine vaccination program contributed to preventing the outbreak's spread south of La Guajira.

Purification and characterization of RNase P from Clostridium sporogenes.

RNase P is a multi-subunit enzyme responsible for the accurate processing of the 5' terminus of all tRNAs. The RNA subunit from Clostridium sporogenes has been partially purified and characterized. The RNA is approximately 400 nucleotides long and makes a precise endonucleolytic cleavage at the mature 5' terminus of tRNA. The RNA requires moderate concentrations of Mg2+ (20 mM) and relatively high concentrations of NH4Cl (800 mM) for optimal activity. Mn2+ effectively substitutes for Mg2+ at 2 mM. Zn2+, Ni2+, Ca2+, and Co2+ are ineffective at stimulating activity. Monovalent ions are, in general, more effective the greater the ionic radius (NH+4 greater than Cs greater than Rb greater than K greater than Na). In contrast to the activity of Bacillus subtilis, C. sporogenes RNase P RNA is significant more active in (NH4)2SO4 than in NH4Cl.

Relationship between transcutaneous and arterial carbon dioxide tension in adult patients anesthetized with nitrous oxide-fentanyl and nitrous oxide-enflurane.

The transcutaneous technique of measuring carbon dioxide tension (tcPCO2) was studied in 30 adult neurosurgery patients undergoing nitrous oxide-enflurane or nitrous oxide-fentanyl anesthesia to determine the relationship between tcPCO2 and PaCO2. tcPCO2 was an accurate (r = 0.9) and clinically useful trend indicator of PaCO2. The ability to detect trends was unaffected by the type of anesthetic agent used. The technique was less useful in predicting absolute values for PaCO2 (r = 0.64). This technique may be particularly useful in situations in which control PaCO2 is essential to patient management.