In vitro Propagation of Date Palm Cultivars Magdoul and Safwai through Somatic Embryogenesis

The success of genetic conservation, cloning and possible genetic transformation requires an effective micropropagation protocol in vitro. For date palm (Phoenix dactylifera L.), there seems to be a lot of reported genotypic variation influencing optimum in vitro protocols. Two different cultivars of date palm Safawi and Magdoul were investigated to establish efficient protocol for callus induction, somatic embryogenesis, shoot proliffaration in vitro and plant acclimization ex vitro. The highest value of callus induction and relative water content (RWC) was reached at 25.0 mg L-1 2, 4-D and 5.0 mg L-1 2iP; 10 mg L-1 2, 4-D and 8.0 mg L-1 2iP for cvs. Safawi and Magdoul, respectively. The highest percentage of callus producing somatic embryos were 92.25% and 96.18% obtained on MS medium fortified with 6.0 mg L-1 2iP with 1.0 or 3.0 mg L-1 NAA for cvs. Safawi and Magdoul, respectively. High root formation occured on 2 and/or 2.5 mg L-1 NAA alone or with of 0.5 mg L-1 IBA. Regenerated plantlets were successfully acclimatized ex vitro with a 55-70% survival rate. The present article gives an update of the current approaches of date palm micropropagation with emphasis on the plant regeneration through somatic embryogenesis. It highlights key factors that influence in vitro differentiation and evaluated somatic embryos from embryogenic lines established from two cultivars with respect to their ability to germinate and be converted into plantlets

Cryopreservation of Embryogenic Callus of Date Palm (Phoenix dactylifera) cv. Magdoul through Encapsulation-Dehydration Technology

To overcome the genetic deterioration and the extinction of date palm genotypes and species as result of environmental challenges, it has become necessary to develop techniques that allow the remaining genetic resources to be persevered under in-vitro conditions for long period without a substantial decline in the vitality, genetic stability and low survival. The development of an effective cryopreservation method for date palm (cv. Magdoul) via an encapsulation-dehydration method for long term conservation was researched in this study. Embryogenic callus, obtained from shoot tip culture, was used as explants and exposed to different concentration of sucrose (0.0, 0.5, 0.75, 1.0 and 1.5 M) combined with dehydration time (0–10 days) and different drying time (1–10 h). It was found that using sucrose at 0.75 M was more effective compared with using 1.0 and 1.5 M. Among the drying time tested, 4 h gave the best result for survival. The interaction treatment between sucrose, dehydration and moisture content (MC) was studies. After different periods of time in liquid nitrogen, the greatest values of survival (74.4%) and regrowth (71.25%) after 6 weeks of storage were obtained when 0.75 M sucrose for three days followed by 4 h dehydration period with a 39.50% MC was applied. The present results indicated that encapsulation-dehydration can be applied as a simple and effective protocol to a diverse range of cv. Magdoul genetic resources using embryogenic calli. © 2020 Friends Science Publisher

Should mechanical dyssynchrony be assessed in patients with implantable cardioverter-defibrillators?

Cardiac Dysfunction and Arrhythmia

Echocardiographic prediction of outcome after cardiac resynchronization therapy: conventional methods and recent developments

Echocardiography plays an important role in patient assessment before cardiac resynchronization therapy (CRT) and can monitor many of its mechanical effects in heart failure patients. Encouraged by the highly variable individual response observed in the major CRT trials, echocardiography-based measurements of mechanical dyssynchrony have been extensively investigated with the aim of improving response prediction and CRT delivery. Despite recent setbacks, these techniques have continued to develop in order to overcome some of their initial flaws and limitations. This review discusses the concepts and rationale of the available echocardiographic techniques, highlighting newer quantification methods and discussing some of the unsolved issues that need to be addressed

A Systematic Review on the Extent and Quality of Pharmacoeconomic Publications in Egypt.

BACKGROUND: Egypt faces many challenges when matching patient needs with available resources. Consequently, there has been an increasing interest in pharmacoeconomics as an aid tool in health decision-making to better allocate resources. OBJECTIVES: To review and evaluate the volume and the quality of published pharmacoeconomic studies in Egypt. METHODS: A literature search was conducted in August 2018 using PubMed, Google Scholar, and Cochrane library to identify published Egyptian pharmacoeconomic studies. Articles were included if they were original economic studies, written and published in English, and conducted in Egypt. Each article was assessed independently by two reviewers using the 100-point Quality of Health Evaluation Studies (QHES) scale. RESULTS: Fifteen studies published between 2002 and 2017 were included in the review. Most of them were cost-effectiveness analyses (60%). The minority used secondary data (33.3%) or adopted modeling techniques (40%). The mean QHES score of the included studies was 70.1 ± 21.8, and approximately 40% of them had a QHES score of more than 80. CONCLUSION: Pharmacoeconomic evaluations in Egypt are still in their infancy. The Egyptian guidelines for economic evaluation should be adopted and the EQ-5D-5L value sets should be developed to increase the quality of economic research

Variation in the provision and practice of implant-based breast reconstruction in the UK: Results from the iBRA national practice questionnaire

Introduction The introduction of biological and synthetic meshes has revolutionised the practice of implant-based breast reconstruction (IBBR) but evidence for effectiveness is lacking. The iBRA (implant Breast Reconstruction evAluation) study is a national trainee-led project that aims to explore the practice and outcomes of IBBR to inform the design of a future trial. We report the results of the iBRA National Practice Questionnaire (NPQ) which aimed to comprehensively describe the provision and practice of IBBR across the UK. Methods A questionnaire investigating local practice and service provision of IBBR developed by the iBRA Steering Group was completed by trainee and consultant leads at breast and plastic surgical units across the UK. Summary data for each survey item were calculated and variation between centres and overall provision of care examined. Results 81 units within 79 NHS-hospitals completed the questionnaire. Units offered a range of reconstructive techniques, with IBBR accounting for 70% (IQR:50–80%) of participating units' immediate procedures. Units on average were staffed by 2.5 breast surgeons (IQR:2.0–3.0) and 2.0 plastic surgeons (IQR:1.0–3.0) performing 35 IBBR cases per year (IQR:20-50). Variation was demonstrated in the provision of novel different techniques for IBBR especially the use of biological (n = 62) and synthetic (n = 25) meshes and in patient selection for these procedures. Conclusions The iBRA-NPQ has demonstrated marked variation in the provision and practice of IBBR in the UK. The prospective audit phase of the iBRA study will determine the safety and effectiveness of different approaches to IBBR and allow evidence-based best practice to be explored

Pooled analysis of WHO Surgical Safety Checklist use and mortality after emergency laparotomy

Background The World Health Organization (WHO) Surgical Safety Checklist has fostered safe practice for 10 years, yet its place in emergency surgery has not been assessed on a global scale. The aim of this study was to evaluate reported checklist use in emergency settings and examine the relationship with perioperative mortality in patients who had emergency laparotomy. Methods In two multinational cohort studies, adults undergoing emergency laparotomy were compared with those having elective gastrointestinal surgery. Relationships between reported checklist use and mortality were determined using multivariable logistic regression and bootstrapped simulation. Results Of 12 296 patients included from 76 countries, 4843 underwent emergency laparotomy. After adjusting for patient and disease factors, checklist use before emergency laparotomy was more common in countries with a high Human Development Index (HDI) (2455 of 2741, 89.6 per cent) compared with that in countries with a middle (753 of 1242, 60.6 per cent; odds ratio (OR) 0.17, 95 per cent c.i. 0.14 to 0.21, P <0001) or low (363 of 860, 422 per cent; OR 008, 007 to 010, P <0.001) HDI. Checklist use was less common in elective surgery than for emergency laparotomy in high-HDI countries (risk difference -94 (95 per cent c.i. -11.9 to -6.9) per cent; P <0001), but the relationship was reversed in low-HDI countries (+121 (+7.0 to +173) per cent; P <0001). In multivariable models, checklist use was associated with a lower 30-day perioperative mortality (OR 0.60, 0.50 to 073; P <0.001). The greatest absolute benefit was seen for emergency surgery in low- and middle-HDI countries. Conclusion Checklist use in emergency laparotomy was associated with a significantly lower perioperative mortality rate. Checklist use in low-HDI countries was half that in high-HDI countries.Peer reviewe

Mortality from gastrointestinal congenital anomalies at 264 hospitals in 74 low-income, middle-income, and high-income countries: a multicentre, international, prospective cohort study

Background: Congenital anomalies are the fifth leading cause of mortality in children younger than 5 years globally. Many gastrointestinal congenital anomalies are fatal without timely access to neonatal surgical care, but few studies have been done on these conditions in low-income and middle-income countries (LMICs). We compared outcomes of the seven most common gastrointestinal congenital anomalies in low-income, middle-income, and high-income countries globally, and identified factors associated with mortality. // Methods: We did a multicentre, international prospective cohort study of patients younger than 16 years, presenting to hospital for the first time with oesophageal atresia, congenital diaphragmatic hernia, intestinal atresia, gastroschisis, exomphalos, anorectal malformation, and Hirschsprung's disease. Recruitment was of consecutive patients for a minimum of 1 month between October, 2018, and April, 2019. We collected data on patient demographics, clinical status, interventions, and outcomes using the REDCap platform. Patients were followed up for 30 days after primary intervention, or 30 days after admission if they did not receive an intervention. The primary outcome was all-cause, in-hospital mortality for all conditions combined and each condition individually, stratified by country income status. We did a complete case analysis. // Findings: We included 3849 patients with 3975 study conditions (560 with oesophageal atresia, 448 with congenital diaphragmatic hernia, 681 with intestinal atresia, 453 with gastroschisis, 325 with exomphalos, 991 with anorectal malformation, and 517 with Hirschsprung's disease) from 264 hospitals (89 in high-income countries, 166 in middle-income countries, and nine in low-income countries) in 74 countries. Of the 3849 patients, 2231 (58·0%) were male. Median gestational age at birth was 38 weeks (IQR 36–39) and median bodyweight at presentation was 2·8 kg (2·3–3·3). Mortality among all patients was 37 (39·8%) of 93 in low-income countries, 583 (20·4%) of 2860 in middle-income countries, and 50 (5·6%) of 896 in high-income countries (p<0·0001 between all country income groups). Gastroschisis had the greatest difference in mortality between country income strata (nine [90·0%] of ten in low-income countries, 97 [31·9%] of 304 in middle-income countries, and two [1·4%] of 139 in high-income countries; p≤0·0001 between all country income groups). Factors significantly associated with higher mortality for all patients combined included country income status (low-income vs high-income countries, risk ratio 2·78 [95% CI 1·88–4·11], p<0·0001; middle-income vs high-income countries, 2·11 [1·59–2·79], p<0·0001), sepsis at presentation (1·20 [1·04–1·40], p=0·016), higher American Society of Anesthesiologists (ASA) score at primary intervention (ASA 4–5 vs ASA 1–2, 1·82 [1·40–2·35], p<0·0001; ASA 3 vs ASA 1–2, 1·58, [1·30–1·92], p<0·0001]), surgical safety checklist not used (1·39 [1·02–1·90], p=0·035), and ventilation or parenteral nutrition unavailable when needed (ventilation 1·96, [1·41–2·71], p=0·0001; parenteral nutrition 1·35, [1·05–1·74], p=0·018). Administration of parenteral nutrition (0·61, [0·47–0·79], p=0·0002) and use of a peripherally inserted central catheter (0·65 [0·50–0·86], p=0·0024) or percutaneous central line (0·69 [0·48–1·00], p=0·049) were associated with lower mortality. // Interpretation: Unacceptable differences in mortality exist for gastrointestinal congenital anomalies between low-income, middle-income, and high-income countries. Improving access to quality neonatal surgical care in LMICs will be vital to achieve Sustainable Development Goal 3.2 of ending preventable deaths in neonates and children younger than 5 years by 2030