Nonstoichiometric FePt Nanoclusters for Heated Dot Magnetic Recording Media

Heated dot magnetic recording (HDMR) provides a path to increase the areal density of magnetic recording media beyond 4 Tb/in2. HDMR-based recording media requires ultrasmall, noninteracting, and thermally stable magnetic dots with high perpendicular anisotropy. We have synthesized nonstoichiometric Fe60Pt40 nanoclusters with and without a Pt buffer layer on silicon substrates, which shows a reduction in chemical ordering temperatures. The Fe60Pt40 nanoclusters retain the hard magnetic phase up to 1023 K with the coercive field of 1.3 Tesla due to the Pt element compensation from the buffer layer. This compensation of Pt was confirmed through X-ray diffraction (XRD) investigations where two distinct phases of Fe3Pt and FePt3 are observed at elevated annealing temperatures. Micromagnetic simulations were performed to understand the effect of magnetic anisotropy, dipolar interaction, and exchange coupling between the soft magnetic Fe3Pt and hard magnetic FePt. The results imply that nonstoichiometric Fe60Pt40 with the Pt buffer layer facilitates low chemical ordering temperatures retaining the high perpendicular anisotropy with minimal noninteracting behavior, suitable for HDMR

PPIUCD in private sector: Prospective study to assess acceptability, safety and expulsion rate of Cu T 380 A in immediate postpartum period

PPIUCD is preferably inserted within 10 minutes of placenta delivery, intracaesarean, or 48 hours of delivery. In India, 65 percent of women have unmet family planning needs. The goal of this prospective study was to assess the acceptability, safety, and expulsion rate of Cu T 380 after 6 weeks of insertion. The research was conducted at St. Stephen's Hospital in Delhi, a tertiary care facility, in the Department of Obstetrics and Gynecology. For a year, 150 patients of various ages were implanted with PPIUCD. Patients were monitored for 6 weeks to assess- 1) Expulsion rate 2) Safety within Within 6 weeks of insertion, there was no evidence of abdominal pain, foul-smelling vaginal discharge, bleeding, or perforation. 3). Removal reasons In our study, we found that the overall complication rate was 9.29 percent, with infection rate 0.7 percent, prolonged lochia rate 2.1 percent, persistent bleeding rate 3.6 percent, and pain abdomen 1.4 percent. The study's removal rate was 5.0 percent. The rate of expulsion was 2.86 percent. The satisfaction rate was 80%. Based on the findings of this study, we believe that postpartum IUCD should be widely used as a contraceptive

Retrospective study on rupture uterus, its causes and maternal-fetal outcome

Rupture uterus is a gravid complication which is commonly seen post uterine surgery in perinatal women leading to maternal morbidity and fetal death. Common causes are previous caeserian section, obstructed labour , malpresentations, multipara women etc. Patient presents with pain, uterine bleeding, fetal distress, and even death of fetus. We did a retrospective study in our institute in which we collected data of previous 4 years. Incidence of rupture was 0.2%.  Most common risk factor was previous caeserian section and other uterine surgery. Unscarred uterus ruptured most commonly due to obstructed labour, other causes were malpresentation, multipara women and induction of labour. Majority of fetuses can not be saved due to late arrival to hospital. 49 patient required obstetric hysterectomy and rest 53 uterus repaired with or without ligation. Other complications were extension of rupture, bladder injury and hemoperitonium. We concluded that scarred uterus need to monitor closely at term and promt transportation and  diagnosis can improve fetomaternal outcome

Increase in the use of inhaled nitric oxide in neonatal intensive care units in England: a retrospective population study

Objective To describe temporal changes in inhaled nitric oxide (iNO) use in English neonatal units between 2010 and 2015.Design Retrospective analysis using data extracted from the National Neonatal Research Database.Setting All National Health Service neonatal units in England.Patients Infants of all gestational ages born 2010–2015 admitted to a neonatal unit and received intensive care.Main outcome measures Proportion of infants who received iNO; age at initiation and duration of iNO use.Results 4.9% (6346/129 883) of infants received iNO; 31% (1959/6346) were born <29 weeks, 18% (1152/6346) 29–33 weeks and 51% (3235/6346)>34 weeks of gestation. Between epoch 1 (2010–2011) and epoch 3 (2014–2015), there was (1) an increase in the proportion of infants receiving iNO: <29 weeks (4.9% vs 15.9%); 29–33 weeks (1.1% vs 4.8%); >34 weeks (4.5% vs 5.0%), (2) increase in postnatal age at iNO initiation: <29 weeks 10 days vs 18 days; 29–33 weeks 2 days vs 10 days, (iii) reduction in iNO duration: <29 weeks (3 days vs 2 days); 29–33 weeks (2 days vs 1 day).Conclusions Between 2010 and 2015, there was an increase in the use of iNO among infants admitted to English neonatal units. This was most notable among the most premature infants with an almost fourfold increase. Given the cost of iNO therapy, limited evidence of efficacy in preterm infants and potential for harm, we suggest that exposure to iNO should be limited, ideally to infants included in research studies (either observational or randomised placebo-controlled trial) or within a protocolised pathway. Development of consensus guidelines may also help standardise practice