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Safe and efficient flight operations depend on effective air traffic management and the decision-making skills of air traffic control officers (ATCOs). However, managing air traffic in terminal control areas (TMAs), especially in approach control units, is challenging due to the complexity of the airspace. This is particularly evident in metroplex airspaces like the Istanbul TMA, which features multiple civil and military airports, diverse approach systems, and heavy traffic volumes, all contributing to an exceptionally complex operational environment. This study examines how experienced ATCOs perceive airspace complexity, focusing on approach control units within TMAs. Using Istanbul TMA as a case study, the research combines qualitative and quantitative methods to analyse the factors contributing to complexity. In the first phase, the Content Validity Method (CVM) is used to identify and confirm the key factors influencing airspace complexity. In the second phase, the Best-Worst Method (BWM) is applied to measure the importance of these factors. The study involves two groups of ATCOs: 40 in the first group and 20 in the second. The results reveal that ‘conflicts’ are the most critical factor affecting airspace complexity, highlighting the importance of conflict resolution in air traffic control. Other significant factors include rules and procedures, airspace design and traffic density. This study provides clear insights into the challenges of managing TMA, especially in metroplex airspace. Identifying and analysing the key factors offers valuable guidance for improving air traffic management and supporting ATCOs in making better decisions.
Congested airports benefit from parallel-point merge systems (P-PMSs) for efficient arrival route control. However, the decline in air traffic due to COVID-19 has curtailed its optimal utilisation, especially with the reduced need for long sequencing legs. As air traffic is poised to rebound, the evident volatility seen during and post COVID-19, as well as the daily fluctuations between peak and off-peak hours, underscore the importance of the dynamic utilisation of sequencing legs in P-PMSs. EUROCONTROL proposes various leg configurations to manage fluctuating traffics, ensuring both efficiency and safety. First, we proposed two additional leg configurations for the Istanbul Airport, offering continuous descent with the engines operating at idle thrust during leg flights; partially overlapped and fully dissociated. While they offer an alternative for controllers during low to medium traffic scenarios, current long and fully overlapped parallel legs may be used in high traffic due to the volatility of traffic density throughout a day. Therefore, we suggest an approach that provides dynamic utilisation of these configurations. We first modeled and analysed the configurations for various traffic numbers and scenarios. Then, we introduced a new stochastic matheuristic model that considers the configuration changes throughout the day and provides feasible and robust sequences applicable to all configurations by combining the benefits of mathematical models with the adaptability and speed of heuristic methods. Several test problems were evaluated using the terminal manoeuvering area structure of Istanbul Airport as a case study. The results indicate that by changing configurations, an average of 35 kg in fuel savings per aircraft can be achieved. The results also show that the proposed approach outperforms traditional stochastic mathematical models and the first-come first-serve (FCFS) strategy, ensuring efficient air traffic management in terms of fuel and delay with robust sequencing by eliminating the need for re-sequencing during configuration changes.
Lithium is a mood stabilizer often used as a first-line treatment for bipolar disorder. Its narrow therapeutic window and changes in the absorption, distribution, and elimination of the drug following bariatric surgery have important implications regarding patient safety.
Objectives
We present a 51-year-old female patient with bipolar disorder and a medical history of morbid obesity, type 2 diabetes mellitus, hypothyroidism, hyperlipidemia, and essential hypertension. She was mentally stable on lithium 1200 mg/day, valproate 500 mg/day, and quetiapine 400 mg/day. She had undergone laparoscopic sleeve gastrectomy. After a month, she showed up to the emergency room (ER) with nausea, vomiting, diarrhea, and fatigue. Gastroenteritis was suspected until the patient started showing neurological symptoms such as delirium, dysarthria, ataxia, chorea, and athetosis.
Methods
The patient was monitored and received aggressive intravenous hydration (3000 cc of 0.9% serum isotonic) in the intensive care unit (ICU). She was prescribed intramuscular biperiden injection of 5 mg/ml/day, pheniramine 45.5 mg/2 ml/day, and lorazepam 1 mg/day. Her lithium levels were checked every six hours. She was agitated and disoriented for the first five days despite lithium levels being in the therapeutic range. On day six, her blood lithium levels dropped to 0.399 mmol/L. Her psychiatric examination revealed that she resumed cooperation and orientation, her dysarthria subsided. However, her thought content and attitude were grandiose, and she had a labile affect. We prescribed 5 mg/day of olanzapine routinely and 1 mg/day of lorazepam on a needed basis. The next day, her labile affect became calmer, and her sleep improved so she was discharged from the ICU and admitted to general surgery inpatient service, and olanzapine was titrated to 10 mg per day since she had elevated mood symptoms.
Results
After 7 days of intravenous hydration and supportive treatment, her neurological symptoms completely subsided except for a fine tremor, which lasted for another 3 days and then ceased. She was clinically stabilized without further need for intervention. Her lithium level was 0.206 mmol/L before her discharge.
Conclusions
We believe it is of utmost importance to build a consensus in guidelines and inform physicians about lithium toxicity and its symptoms after bariatric surgeries. We recommend a careful follow-up of the patient pre-and postoperatively. Preoperative psychiatric intervention includes decreasing the lithium dose gradually and discontinuing it. After the operation, lithium can be started with a much lower dose and may be increased by checking lithium levels every week for at least 6 weeks after the operation until the patient can digest solid food again, and then every 2 weeks for 6 months, and thereafter every month for one year.
Adherence to palivizumab prophylaxis programmes is crucial to protect infants with CHD against respiratory syncytial virus infections. We analysed the effectiveness of two nudge interventions in increasing adherence.
Methods:
Our study included 229 infants, and their caregivers, from five centers in Turkey in the 2020–2021 respiratory syncytial virus season. We randomly allocated caregivers to a control and two intervention groups. Caregivers in all groups were informed about the prophylaxis programme and provided a schedule. Additionally, caregivers in Intervention 1 were called two days before appointments (default bias) and were asked to plan the appointment day (implementation intention), whereas caregivers in Intervention 2 received biweekly text messages informing them about the programme’s benefits (availability bias) and current adherence rate (social norm).
Results:
Caregivers in Intervention 1 had a significantly higher adherence rate than Control (97.3% versus 90.9%) (p = 0.014). Both interventions had a significant effect on participants in their first prophylaxis season (p = 0.031, p = 0.037). Families where the father was employed had a 14.2% higher adherence rate (p = 0.001). Every additional child was associated with a 2.2% decrease in adherence rate (p = 0.02). In control, ICU admission history was associated with an 18.8% lower adherence rate (p = 0.0001), but this association disappeared in intervention groups.
Conclusion:
This is the first prospective interventional study which, in the context of palivizumab prophylaxis, analyses the effectiveness of nudge interventions based on established cognitive biases by comparing randomly generated intervention and control groups. We found that default bias and implementation intention have significant effects on adherence.
Vasospastic angina is extremely uncommon for adolescents to experience chest discomfort, which is defined by transitory ST segment elevation or depression and angina symptoms that occur while at rest. It may result in potentially fatal conditions like myocardial infarction, ventricular fibrillation, or even sudden cardiac arrest. To aim of this article is to report a very rare case of a 17-year-old male Afghan refugee who was diagnosed with vasospastic angina after presenting with chest pain, and after receiving calcium channel blocker and nitrates for medical therapy, there were no angina attacks. Our case underlines the value of a thorough evaluation of adolescent’s chest pain, the need to diagnose based on the symptoms, and the necessity of performing coronary angiography to rule out coronary causes when there is a high suspicion to a cardiac cause.
In some small airports, a parallel taxiway is not built due to space restrictions or financial issues; hence, the runway itself is often used as a taxiway in this type of airport. After touch down, aircraft move to the U-turn area at the end of the runway and turn 180 degrees, then move back to the desired point, such as a gate or the apron, using the runway. The runway is blocked to other arrivals and departures during this process. This process, called backtrack or back-taxi, can result in high delays for both arrivals and departures. Runway occupancy times (ROTs) vary depending on numerous conditions, including pilot performance, weather conditions, aircraft type, etc. Although there are speed restrictions and procedures announced in advance, the actual performance can be uncertain. In addition, most aircraft can make a U-turn as soon as they sufficiently reduce their speed before they reach the U-turn area especially if they are already delayed. These situations bring enormous uncertainties for traffic management at such an airport. Controllers may need help to sequence aircraft, particularly in busy traffic. In this study, a stochastic mathematical model is developed to sequence arrival/departure operations at such an airport considering the ROT uncertainties of arrivals. The objective function of the developed model is determined as the minimisation of the total delay. ROT data was obtained by observing radar tracks of 120 arriving flights. Reasonable ROT scenarios with various probabilities to represent ROT uncertainties were integrated into the mathematical modeling. In addition, two different sequencing approaches are presented as well as the first come first serve (FCFS) approach. As a result, the proposed stochastic approach provides robust sequences applicable for all ROT scenarios with significant delay savings up to an average of 18.4% and 39.5% compared to deterministic and FCFS approaches, respectively.
The aim of this study is to evaluate the changes in myocardial functions in children who underwent haematopoietic stem cell transplantation along with associated chemotherapy. Additionally, we evaluated the effect of baseline echocardiographic parameters on mortality. We evaluated 39 patients (mean age 7.4 years) who underwent haematopoietic stem cell transplantation owing to non-malignant disease. The control group included 39 healthy children who had normal cardiac findings. The myocardial functions were evaluated in all subjects by conventional echocardiography and tissue Doppler echocardiography before haematopoietic stem cell transplantation and in the 1st, 3rd, 6th, and 12th month after haematopoietic stem cell transplantation. All patients had normal left ventricular ejection fraction before haematopoietic stem cell transplantation, except one case. Before haematopoietic stem cell transplantation, the patient group had significantly greater mean pulmonary artery pressure and lower tricuspid valve annular plane excursion rate. Baseline E’ velocities for mitral lateral annuli, septum, and tricuspid lateral annuli were lower in the patient group than the control group. The E’ velocities for the left ventricle decreased in the patient group after haematopoietic stem cell transplantation, and then returned to baseline levels at the 6 months. E’ and S’ velocities for tricuspid lateral annuli also decreased after haematopoietic stem cell transplantation and were still depressed in the first year after haematopoietic stem cell transplantation. Baseline E’ velocity for septum was significantly lower in patients who died after haematopoietic stem cell transplantation than patients who survived (p = 0.009). Subclinical impairment in both ventricular functions was observed after haematopoietic stem cell transplantation and the right ventricular functions were affected for longer periods than left ventricle after haematopoietic stem cell transplantation. The myocardial functions should be monitored after the first year of haematopoietic stem cell transplantation.
Vesicoureteral reflux is a prominent congenital anomaly of the kidney and the urinary tract. Further, renal scarring is known to be related to chronic inflammation. However, there have been limited studies to date regarding the cardiovascular consequences of vesicoureteral reflux.
Objective:
The aim of this study is to evaluate the possible subclinical atherosclerosis and cardiovascular complications in children with vesicoureteral reflux.
Methods:
Patients with vesicoureteral reflux and age matched healthy controls were prospectively included in this case-control study. Patients were divided into two groups concerning renal scarring status. To assess cardiac functions, carotid artery intima media, epicardial adipose tissue, and periaortic adipose tissue thicknesses were evaluated.
Results:
There were 50 patients with vesicoureteral reflux; 26 patients without renal scarring and 24 patients with renal scarring, as well as 40 healthy controls. Myocardial performance indexes (Tei indexes) measured by tissue Doppler echocardiography from septum and left ventricle were significantly increased in study group (for all, p < 0.001). Also, intima media, epicardial adipose tissue, and periaortic adipose tissue thicknesses of the study groups were significantly higher than the control group (for all, p < 0.001). However, no statistical difference was observed between renal scarring (−) and renal scarring (+) groups.
Conclusions:
Results of our study showed early deterioration of cardiac systolic and diastolic functions in children with vesicoureteral reflux regardless of renal scarring. Also, diagnosis of vesicoureteral reflux is an important risk factor for subclinical atherosclerosis, independent of renal scarring, which should be considered in the follow-up of these patients.
Seckel syndrome is a very rare autosomal recessive disorder also known as bird headed dwarfism”. It is characterised by proportional short stature, low birth weight, dysmorphic facial appearance, and mental retardation. In addition to its dysmorphic features, skeletal, endocrine, gastrointestinal, haematologic, genitourinary, and nervous system has been involved. Cardiovascular features very rarely associate with Seckel syndrome. We report two patients with Seckel syndrome, one with dilated cardiomyopathy and the other with multiple ventricular septal defects. Dilated cardiomyopathy and isolated ventricular septal defect have not been previously reported in Seckel syndrome. Cardiovascular evaluation should be performed in all patients with Seckel syndrome. Early diagnosis of congenital and acquired heart diseases will reduce morbidity and mortality in these patients.
Dignity therapy (DT) is a brief, individualized intervention, which provides terminally ill patients with an opportunity to convey memories, essential disclosures, and prepare a final generativity document. DT addresses psychosocial and existential issues, enhancing a sense of meaning and purpose. Several studies have considered the legacy topics most frequently discussed by patients near the end of life. To date, no Portuguese study has done that analysis.
Method
We conducted a qualitative analysis of 17 generativity documents derived from a randomized controlled trial (RCT). Inductive content analysis was used to identify emerging themes.
Results
From the 39 RCT participants receiving DT, 17 gave consent for their generativity document to undergo qualitative analysis. Nine patients were female; mean age of 65 years, with a range from 46 to 79 years. Seven themes emerged: “Significant people and things”; “Remarkable moments”; “Acknowledgments”; “Reflection on the course of life”; “Personal values”; “Messages left to others”; and “Requests and last wishes”.
Significance of results
Generativity document analysis provides useful information for patients nearing death, including their remarkable life moments and memories, core values, concerns, and wishes for their loved ones. Being conscious of these dominant themes may allow health providers to support humanized and personalized care to vulnerable patients and their families, enhancing how professionals perceive and respond to personhood within the clinical setting.
Total anomalous pulmonary venous connection is a rare cyanotic CHD that requires surgical repair. An unligated vertical vein after total anomalous pulmonary venous connection surgery may help to decrease the episodes of post-operative pulmonary hypertensive crises, low cardiac output syndrome, and mortality. The aim was to assess long-term outcome and our post-operative transcatheter vertical vein closure experiences in five patients with repaired total anomalous pulmonary venous connection patients.
Methods:
A retrospective study was conducted in five cases with an unligated vertical vein following repair of supra-cardiac total anomalous pulmonary venous connection at our hospital from 2011 through 2018. Patients characteristics, cardiac catheterisation findings, surgical, and transcatheter procedural details were retrospectively analysed.
Results:
Transcatheter closure of the unligated vertical vein was technically successful in all the patients. Procedure-related complications were not observed in any of the patients. No long-term complication was found.
Conclusions:
We suggest that transcatheter closure of the patent vertical vein is an effective and well-tolerated alternative to the surgical approach.
Cardio-facio-cutaneous syndrome is a genetic anomaly characterised by craniofacial dysmorphia, developmental retardation, skin lesions, mental retardation/learning disability, and cardiac malformations. Cardio-facio-cutaneous syndrome rarely causes arrhythmias and has not been previously associated with long QT in the literature. With this report, it was aimed to draw attention to a different presentation of the long QT syndrome.
Lower respiratory tract infections caused by respiratory syncytial virus can be severe during infancy, which requires admission to the hospital. These infections may be more severe especially in patients with congenital heart disease. Passive immunisation with palivizumab, a monoclonal antibody, is recommended in high-risk infants. We tried to determine the compliance rates, factors affecting compliance, and also other microorganisms responsible for lower respiratory tract infections after palivizumab prophylaxis in these patients.
Methods:
We evaluated patients’ compliance to prophylaxis with palivizumab in two consecutive respiratory syncytial virus seasons from pharmacy records. We also investigated factors affecting compliance and the frequency of hospitalisations for lower respiratory tract infections. We investigated the causative microorganisms detected in hospitalised patients.
Results:
In this study, 86.7% of the desired number of injections was achieved in 176 patients in two seasons. Out of these, 117 patients (66.4%) received all the doses they were prescribed. Although not statistically significant, compliance to prophylaxis was higher in male patients, cyanotic patients, those who started under 1 year old, and who lived in the city centre. Human metapneumovirus, parainfluenza type 3, and bocavirus were detected in the hospitalised patients.
Conclusion:
Patients with congenital heart disease can survive the period of infancy with less problem by making palivizumab prophylaxis more effective, and awareness about non- respiratory syncytial virus factors may be a guide for the development of new treatments.
Early life stressful events cause long-term neural changes that are associated with psychiatric disorders.
Objective
Early life manipulations focus on commonly the impact of remaining separate from the mother in a specific period of time. The maternal odor is required for pups to approach the mother for nursing. What happens when there is a mother that smell like a real mother but does not take care her own pups?
Aim
To investigate the fake mother effects on adult rat's behavioral changes, NMDR2B protein level changes in prefrontal cortex and hippocampus.
Methods
Wistar rats were used. Fake mother (n:13), early handling (n:12), maternal separation (n:14) and control (n:12) were the study groups. A fake mother is an object that smells like a real dam. When the real mother is separated from own pups fake mother stays with the pups for an hour. Manipulations were made during the postnatal first 14 days. Behavioral tests (social interaction test, elevated plus maze, novel object recognition test) were made between postnatal 62 and 78 days. NMDAR2B protein levels in prefrontal cortex and hippocampus were evaluated by using ELISA at postnatal 78 days.
Results
In social interaction test, fake mother group exhibited less social behavior and more aggressive behavior than the other groups. Their long-term memory functions were the lowest. NMDAR2B protein levels in the hippocampus increased in rats that exposed to early stressful life events.
Conclusion
These results support that being raised by fake mother increases aggressive behavior and decrease social behavior in adulthood.
Disclosure of interest
The authors have not supplied their declaration of competing interest.
In this research, anxiety, depression symptoms and severity were compared between healthy controls (HC), vestibuler migraine (VM) and migraine patients without history of vertigo (MO).
Method
Thirty-five definite vestibuler migraine patients (according to Neuhauser criteria), 35 MO patients and 32 healthy controls were included. All patients were evaluated for their lifetime psychiatric disorders with Structured Clinical Interview for DSM–IV/Clinical version (SCID-I/CV). All three groups evaluated by:
– Hamilton Anxiety Rating Scale (HARS);
– State-Trait Anxiety Inventory (STAI), (STAI-X1) and the other trait anxiety STAI-X2);
Psychiatric diagnosis history (SCID-I); comparison of VM and MO did not indicate a significant difference (P < 0.05). VM and MO patients were significantly different than HC in terms of anxiety symptoms in “HAM-A, PENN, ASA, PAS-SR and PAS-SR subscales (P < 0.05)”. VM was significantly different than MO patients in BDE and PAS-SR (overall; separation anxiety, agoraphobia, reassurance seeking) (P < 0.05). The longer the history of migraine the higher was the anxiety points in both in VM and MO patients (P < 0.05). Headache and vertigo severity in VM patients were significantly correlated with the elevated anxiety and depression points (P < 0.05).
Conclusion
VM and MO patients significantly different in anxiety and mood disorder when compared with healthy controls. Our findings showed that VM patients were more vulnerable to psychiatric disorders. For that reason, multidisciplinary approach for the treatment of VM may facilitate the treatment process.
Disclosure of interest
The authors have not supplied their declaration of competing interest.
Acute coronary syndrome is a cause of cardiac-induced chest pain and rarely seen among childhood. It should be kept in mind in patients presenting with typical chest pain with a history of CHD and/or surgery, as this will lead to life-threatening complications and death. We present an adolescent with a history of Bentall operation who had acute coronary syndrome owing to coronary thrombosis as a result of inappropriate drug use.
This study evaluated cardiac function using tissue Doppler echocardiography and assessed electrocardiographic findings in children diagnosed with Wilson’s disease.
Method:
Asymptomatic patients with a diagnosis of Wilson’s disease (n = 43) were compared to healthy controls (n = 37) that were age and gender matched.
Results:
The standard electrocardiographic and conventional echocardiographic examinations were similar in both groups. The left ventricular ejection fraction, shortening fraction, and diastolic function were not significantly different between the two groups. The Tei index for mitral lateral, mitral septal, tricuspid lateral, tricuspid septal, and inter-ventricular septum on tissue Doppler echocardiography was higher in the patient group, yet it did not reach statistical significance. Mitral lateral and septal systolic annular velocity values were significantly lower in the patient group when compared to the control group (p = 0.02 and 0.04, respectively). Also, mitral lateral and septal isovolumetric contraction time values were higher in the patient group (p = 0.04). Although the left ventricular values were not significantly different, relative left ventricular wall thickness was higher in the patient group when compared to the control group, and concentric remodelling in the left ventricle was found in 7 (16%) of 42 patients. QT interval (p = 0.02) and P-wave dispersion values (p = 0.04) were significantly higher in the patient group compared to the control group, and these tend to predict arrhythmias.
Conclusion:
Our study based on the tissue Doppler echocardiography assessment indicated a subclinical systolic, rather than diastolic, dysfunction in the myocardium with increased QT interval and P-wave dispersion, despite the young age of the patients and short disease duration.
Anomalous single coronary artery from pulmonary artery is a very rare congenital heart anomaly. Anomalous single coronary artery from pulmonary artery has high mortality rates and poor surgical outcome despite advanced surgical techniques. We report a 4-month-old infant presented by congestive heart failure findings and diagnosed with anomalous single trunk coronary arteries arising from right pulmonary artery.
When nanoparticles and nanofibers combined at the nanoscale, they could create new features in the material and therefore new areas of use. In this study, polyvinylpyrrolidone (PVP) nanofibers containing carbon nanoparticles produced by dense medium plasma technology have been fabricated via electrospinning technique for the first time, a new class of nanocomposite mat material has been prepared and evaluated for medical devices. A dense medium plasma technique is used for nanoparticles synthesis, which is novel, cost-efficient, and fast technology when is compared with other common nanoparticles synthesis techniques. Carbon based nanoparticles are synthesized from an arc sustained in benzene (purity, 99.5%) between iron electrodes by the lab-made dense medium plasma system. The study first mentions the production of nanoparticles by a pressure of 8 bar argon gas for glow discharge in a period of 9 seconds using a 0.5 cm electrode distance in a liquid environment (volume of benzene: 30 ml). Then, separated carbon nanoparticles are integrated with the PVP nanofibers produced by the electrospinning method. Processing parameters of PVP nanofibers containing carbon nanoparticle (nanocomposites) are optimized with various conditions such as polymer concentration: 7.8-8.0 %w/v, ratio of nanoparticle to polymer solution: 1-3.9 mg /ml, distance of electrode: 10-25 cm, processing time: 5-30 min. All samples are characterized by contact angle measurements, scanning electron microscopy and transmission electron microscopy. At the same time, electrical conductivity of nanocomposite mats are tested for foreseeing usage in biomedical application. Results showed that carbon nanoparticles have diameters in 25 ± 5.4 nm. New nanocomposite material production is proven by transmission electron microscopy. It is a super hydrophilic mat material (static contact angle is lower than 10°). According to the optimization of processing parameters, the diameters of nanocomposite fibers reach down to 150 ±75 nm., Nanocomposite mat resistance is found to be dramatically higher than that for the bare PVP nanofiber mat resistance. According to these results, usage in biomedical application of new material was discussed. It has a great potential to use as biocompatible, light, insulator new material.