Different periods, similar challenges, opposing paths: Exploring the social structure of popular science magazines in Turkey.

This study questions the social relations behind the challenges that popular science magazines in Turkey have faced from their onset, by focusing on the peculiarities of different historical periods and prevailing relations of production. The history of popular science magazines from the Ottoman Empire to the present day is also the history of the transition from artisan-like relations of production to factory-like relations of production and more. In this long historical period, premodern social relations and market conditions come to the fore as the main source of the challenges these magazines face. In recent years, big capital's interest in popular science and the enthusiastic struggle of "zero capital" magazines on the other hand reveal two different sides of the picture. Similar challenges and divergent experiences across different periods indicate that popularizing science goes far beyond bringing science to lay people. This study shows that it is possible to trace a frustrated story of modernization, as well as economic and political turmoil, in these magazines' survival struggle in a country which has not been closely studied in this respect.

The Effect of Anesthesia Type During Delivery on Neonatal Otoacoustic Emission Hearing Test Results: A Tertiary Center Experience.

BACKGROUND: Hearing is essential for the healthy development of an infant as language is one of the main stimulants of intellectual capacity. We investigate the effect of anesthesia type during delivery on neonatal otoacoustic emission (OAE) hearing test results. METHODS: This retrospective cross-sectional study includes 1,493 healthy, full-term (39/0-40/6 gestational weeks) newborns of healthy women and who were delivered by cesarean section. Newborns were divided into 2 groups based on their anesthesia type during delivery: 1) general anesthesia group (n=160), and 2) spinal anesthesia group (n=1333). Maternal age, anesthesia type, birth weight, gestational age at birth, neonatal gender, 1st-5th minute APGAR scores, and OAE results were compared between the groups. RESULTS: 1287 (86.2%) newborns were reported to have passed the first step of OAE; 206 (13.8%) newborns were reported to have failed the first step and passed the second test. In the general anesthesia group, 133 (83.1%) of the newborns passed the first OAE test and 27 (16.9%) newborns had false-positive results. In the spinal anesthesia group, 1,154 (86.6%) of the newborns passed the first OAE test and 179 (13.4%) newborns had false-positive results. The difference between the 2 groups by false-positive values was found to be statistically significant (p<0.001). CONCLUSIONS: Type of delivery anesthesia may have an effect on the false-positive rates of OAE test results.

Analysis of cystic hygroma diagnosed in the first trimester: Single-center experience

Objective: To evaluate the obstetric outcomes of fetuses with cystic hygroma other than karyotype abnormalities and structural malformations. Material and Methods: We conducted a retrospective study based on the review of medical records of pregnant women in whom ultrasonographic diagnosis of fetal cystic hygroma was established in the first trimester from January 2014 to October 2018. All patients were offered genetic counselling and prenatal invasive diagnostic procedures to obtain fetal karyotype. For ongoing pregnancies fetal echocardiography and detailed second trimester sonographic anomaly screening was performed by a perinatologist/pediatric cardiologist. The demographic characteristics of the women and the results of the karyotype analysis were obtained from the database of our hospital and correlated with the obstetric outcomes. Results: Within a five-year period, there were 106 cases of fetal cystic hygroma. Of those, fetal cardiac malformations were detected in four and micrognathia in one fetus. Eighty-five women underwent fetal invasive procedures and karyotype abnormalities were detected in 52 of the cases. Fetal outcomes of 33 cases with normal karyotype and 21 cases in whom karyotyping analysis were not performed due to patient refusal were enrolled into the study. Obstetric outcomes of 21 women who refused karyotyping consisted of 13 livebirths, seven missed abortions, and one fetal death, whereas those of 33 women with normal karyotype were; 12 livebirths, 12 missed abortions, two hydrops fetalis, and five fetal deaths. Nineteen of 33 fetuses with a normal karyotype and eight of 21 fetuses in whom karyotyping was not performed were terminated. Conclusion: The presence of cystic hygroma carries a high risk for fetal karyotype abnormalities and cardiac malformations. The postnatal outcomes of the fetuses with cystic hygroma appeared to be correlated with the absence of structural malformations and karyotype abnormalities.

Effects of red cell transfusion on cardiac output and perfusion index in preterm infants.

OBJECTIVE/AIM: The present investigation was designed to study the effect of blood transfusion on cardiac output and perfusion index. The aim was to demonstrate a relationship between hematocrit, lactate, cardiac output and perfusion index in anemic preterm infants and to investigate significant changes in these parameters induced by RBC transfusion. METHODS: Anemic infants who were under 35 weeks of gestational age (GA) and were in a stable clinical condition without respiratory or cardiac problems, signs of sepsis, or renal disease at the time of investigation were enrolled in the study. Enrolled infants received 15 ml/kg pure red blood cells over 4 h. Hematocrit and lactate levels were studied before and after transfusion. Cardiac output was measured by an ultrasound device (USCOM 1A) and perfusion index was monitored by pulse oximeter (MasimoRad7). RESULTS: Cardiac output decreased by 9% (p < 0.05), due to decrease in heart rate by 10% (p < 0.05) and stroke volume significantly by 5% (p < 0.05) both in left and right sided cardiac measurements. Perfusion index significantly increased and lactate levels significantly decreased after transfusion (p < 0.05). Htc was inversely correlated with lactate levels, HR, CI and CO (r = -0.33, p = 0.01; r = -0.53, p = 0; r = -0.37, p = 0.004, r = -0.28, p = 0.03). PI was not significantly correlated with Htc levels before and after transfusion (r = 0.07, p = 0.7 and r = 0.007, p =0.97). CONCLUSION: Our data support that heart rate, CO and CI and lactate levels increased as a response to anemia in preterm infants and RBC transfusion improved perfusion index suggesting better tissue oxygenation.