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Ryan Rosenberry, Susie Chung, Michael D Nelson
Exercise represents a major hemodynamic stress that demands a highly coordinated neurovascular response in order to match oxygen delivery to metabolic demand. Reactive hyperemia (in response to a brief period of tissue ischemia) is an independent predictor of cardiovascular events and provides important insight into vascular health and vasodilatory capacity. Skeletal muscle oxidative capacity is equally important in health and disease, as it determines the energy supply for myocellular processes. Here, we describe a simple, non-invasive approach using near-infrared spectroscopy to assess each of these major clinical endpoints (reactive hyperemia, neurovascular coupling, and muscle oxidative capacity) during a single clinic or laboratory visit...
February 20, 2018: Journal of Visualized Experiments: JoVE
Shereen M Hamza, John E Hall
Renal sympathetic nerves contribute significantly to both physiological and pathophysiological phenomena. Evaluating renal sympathetic nerve activity (RSNA) is of great interest in many areas of research such as chronic kidney disease, hypertension, heart failure, diabetes and obesity. Unequivocal assessment of the role of the sympathetic nervous system is thus imperative for proper interpretation of experimental results and understanding of disease processes. RSNA has been traditionally measured in anesthetized rodents, including mice...
February 14, 2018: Journal of Visualized Experiments: JoVE
Masahiko Mukaino, Kei Ohtsuka, Hiroki Tanikawa, Fumihiro Matsuda, Junya Yamada, Norihide Itoh, Eiichi Saitoh
Three-dimensional gait analysis (3DGA) is shown to be a useful clinical tool for the evaluation of gait abnormality due to movement disorders. However, the use of 3DGA in actual clinics remains uncommon. Possible reasons could include the time-consuming measurement process and difficulties in understanding measurement results, which are often presented using a large number of graphs. Here we present a clinician-friendly 3DGA method developed to facilitate the clinical use of 3DGA. This method consists of simplified preparation and measurement processes that can be performed in a short time period in clinical settings and intuitive results presentation to facilitate clinicians' understanding of results...
March 4, 2018: Journal of Visualized Experiments: JoVE
Federica Cavalera, Mario Zanoni, Valeria Merico, Thi Thu Hien Bui, Martina Belli, Lorenzo Fassina, Silvia Garagna, Maurizio Zuccotti
Infertility clinics would benefit from the ability to select developmentally competent vs. incompetent oocytes using non-invasive procedures, thus improving the overall pregnancy outcome. We recently developed a classification method based on microscopic live observations of mouse oocytes during their in vitro maturation from the germinal vesicle (GV) to the metaphase II stage, followed by the analysis of the cytoplasmic movements occurring during this time-lapse period. Here, we present detailed protocols of this procedure...
March 3, 2018: Journal of Visualized Experiments: JoVE
Vladimir Zeldetz, Dmitry Natanel, Matthew Boyko, Alexander Zlotnik, Honore N Shiyntum, Julia Grinshpun, Dmitry Frank, Ruslan Kuts, Evgeni Brotfain, Jochanan Peiser
Contagious depression is a phenomenon that is yet to be fully recognized and this stems from insufficient material on the subject. At the moment, there is no existing format for studying the mechanism of action, prevention, containment, and treatment of contagious depression. The purpose of this study, therefore, was to establish the first animal model of contagious depression. Healthy rats can contract depressive behaviors if exposed to depressed rats. Depression is induced in rats by subjecting them to several manipulations of chronic unpredictable stress (CUS) over 5 weeks, as described in the protocol...
February 22, 2018: Journal of Visualized Experiments: JoVE
Jeffrey B Mason, Kate C Parkinson, Tracy L Habermehl
Ovarian transplantation was first conducted at Utah State University in 1963. In more recent work, heterochronic transplantation of mammalian ovaries is being used to investigate the health-protective effects of young ovaries in young females. The current procedures employ an orthotopic transplantation method, where allogenic ovaries are transplanted back to their original position in the ovarian bursa. This is in contrast to the more commonly used heterotopic transplantation of ovaries/ovarian tissue subcutaneously or under the kidney capsule...
February 12, 2018: Journal of Visualized Experiments: JoVE
John E Downey, Nathaniel Schwed, Steven M Chase, Andrew B Schwartz, Jennifer L Collinger
Intracortical brain-computer interfaces (BCIs) are being developed to assist people with motor disabilities in communicating and interacting with the world around them. This technology relies on recordings from the primary motor cortex, which may vary from day to day. 
 Approach: Here we quantify, in two long-term BCI subjects, the length of time that action potentials from the same neuron, or group of neurons, can be recorded from motor cortex. 
 Main Results: These action potentials, are identified by their extracellular waveforms and may change within a single day, although some of these identified units can be identified consistently for weeks and even months...
March 19, 2018: Journal of Neural Engineering
Marija D Ivanovic, Jovana Petrovic, Andrej Savic, Goran Gligoric, Marjan Miletic, Miodrag Vukcevic, Bosko Bojovic, Ljupco Hadzievski, Tom D P Allsop, David J Webb
The ventilators involved in non-invasive mechanical ventilation commonly provide ventilator support via a facemask. The interface of the mask with a patient promotes air leaks that cause errors in the feedback information provided by a pneumatic sensor and hence patient-ventilator asynchrony with multiple negative consequences. Our objective is to test the possibility of using chest-wall motion measured by an optical fibre-grating sensor as a more accurate non-invasive ventilator triggering mechanism.
 Approach: The basic premise of our approach is that the measurement accuracy can be improved by using a triggering signal that precedes pneumatic triggering in the neuro-ventilatory coupling sequence...
March 19, 2018: Physiological Measurement
Victoria Shelus, Nicki Ashcroft, Sarah Burgess, Monica Giuffrida, Victoria Jennings
CONTEXT: Given the proportion of Kenyan women not using hormonal contraceptives, the country appears to have a substantial need for a modern, natural family planning option. The CycleBeads® mobile phone application (app), a digital platform for the Standard Days Method® of family planning, could help address this issue. METHODS: After the CycleBeads app was promoted in Kenya in May-June 2015, a three-month pilot study was conducted to collect quantitative and qualitative data from 185 female app users...
September 1, 2017: International Perspectives on Sexual and Reproductive Health
Cicely Marston, Alicia Renedo, Gertrude Nsorma Nyaaba, Kazuyo Machiyama, Placide Tapsoba, John Cleland
CONTEXT: According to Demographic and Health Survey (DHS) data, highly educated urban women in some West African countries simultaneously have low rates of both contraceptive use and fertility-suggesting that the DHS may not be capturing a complete picture of women's contraceptive practices. METHODS: Individual in-depth interviews and focus group discussions were conducted with a total of 48 women aged 18-49 in Accra, Ghana, who had at least a secondary education to explore their reproductive lives and relationships, and their views on and use of fertility regulation strategies...
September 1, 2017: International Perspectives on Sexual and Reproductive Health
Céline Vernet, Claire Philippat, Antonia M Calafat, Xiaoyun Ye, Sarah Lyon-Caen, Valérie Siroux, Enrique F Schisterman, Rémy Slama
BACKGROUND: Toxicology studies have shown adverse effects of developmental exposure to industrial phenols. Evaluation in humans is challenged by potentially marked within-subject variability of phenol biomarkers in pregnant women, which is poorly characterized. OBJECTIVES: We aimed to characterize within-day, between-day, and between-week variability of phenol urinary biomarker concentrations during pregnancy. METHODS: In eight French pregnant women, we collected all urine voids over a 1-wk period (average, 60 samples per week per woman) at three occasions (15±2, 24±2, and 32±1 gestational weeks) in 2012-2013...
March 16, 2018: Environmental Health Perspectives
Tiziana Leone, Diego Alburez-Gutierrez, Rula Gandour, Ernestina Coast, Rita Giacaman
BACKGROUND: Armed conflicts can undermine a country's health-care capacity and disrupt the delivery of basic health services. Yet the public health consequences of war remain difficult to quantify, mainly because adequate data do not exist. We hypothesised that the ongoing conflict in the occupied Palestinian territory (including the restrictions on free movement and the strain on health-care services) have had detrimental effects on maternal and child health outcomes. METHODS: We reconstructed data on delivery by caesarean section and diphtheria, pertussis, and tetanus vaccination with pooled data from Demographic and Health Surveys for 2000-14...
February 21, 2018: Lancet
Shahenaz Najjar, Nashat Nafouri, Kris Vanhaecht, Martin Euwema
BACKGROUND: Patient safety is the central component of health-care quality. There is a lack of patient safety data in the occupied Palestinian territory. The aim of this study was to assess patient safety and explore relationships between patient safety culture and the prevalence of adverse events at the department level. METHODS: Between May 25, 2009, and June 1, 2010, the Arabic validated Hospital Survey on Patient Safety Culture was used to measure the norms and perceptions of health professionals regarding safety...
February 21, 2018: Lancet
Shaden Jobran, Randa Kattan, Jamal Shamaa, Hiyam Marzouqa, Musa Hindiyeh
BACKGROUND: Human adenoviruses have an important role in paediatric respiratory tract infections. They are estimated to cause 2-5% of the overall respiratory tract infections and 4-10% of all pneumonias. The aim of this study was to evaluate the clinical presentation and effect of adenoviral infection on the management of infected infants. METHODS: Data were collected from the medical records of patients infected with adenovirus and admitted to Caritas Baby Hospital...
February 21, 2018: Lancet
Said Alyacoubi, Yousef Abuowda, Loai Albarqouni, Bettina Böttcher, Khamis Elessi
BACKGROUND: Disease severity scores such as CURB-65 are often used to guide the management of patients with community-acquired pneumonia. Early and adequate empirical antibiotic treatment reduces mortality. The aim of this study was to examine the severity assessment and management of patients presenting with community-acquired pneumonia at the European Gaza Hospital in the Gaza Strip and to compare this to the best available evidence. METHODS: Medical records of all patients admitted to the European Gaza Hospital with a diagnosis of community-acquired pneumonia between Dec 1, 2015, and March 31, 2016, were reviewed retrospectively...
February 21, 2018: Lancet
Rola Abu Dalfa, Khaled I Abu El Aish, Mohamed El Raai, Nermeen El Gazaly, Ahmed Shatat
BACKGROUND: Diarrhoea causes 15% of under-5 mortality in developing countries. Zinc (Zn) stores in the body are known to be depleted during acute diarrhoea. The aim of this study was to evaluate the efficacy of Zn given with standard treatment to children with acute or moderate diarrhoea. METHODS: In this quasi-unmasked, parallel-group study, we enrolled children with diarrhoea at El-Dorra Paediatric Hospital, Gaza Strip, occupied Palestinian territory. Inclusion criteria were children with more than three unformed stools in the preceding 24 h, duration of diarrhoea up to 72 h, and ability to accept oral fluids or feeds...
February 21, 2018: Lancet
Majdi Ashour
BACKGROUND: People living in the Gaza Strip have experienced a protracted political conflict and extreme socioeconomic adversity since 1948. Economic conditions have deteriorated markedly since the onset of the Palestinian Intifada in 1987 and have been exacerbated by the economic siege after 2006. The health system in the Gaza Strip has faced additional challenges. The aim of this study was to assess how Palestinian households in the Gaza Strip experienced health care services during this period of political turmoil, socioeconomic adversity, and challenges to health services...
February 21, 2018: Lancet
Mads Gilbert
BACKGROUND: The atrocities in Syria have been covered in the four general medical weekly journals in the USA and the UK. Medical journal articles addressing political determinants of public health have rightly described and criticised the international community's failure to enforce humanitarian law while urging global bodies of power to ensure protection of civilians and civilian infrastructure and medical services. Discussions of the political influences on health of people in the occupied Palestinian territory (West Bank and Gaza Strip) seem to be considered politically out-of-bounds by some medical journals...
February 21, 2018: Lancet
Hanne Heszlein-Lossius, Yahya Al-Borno, Samar Shaqoura, Nashwa Skaik, Lasse Melvær Giil, Mads Gilbert
BACKGROUND: During four separate Israeli military attacks on Gaza (2006, 2009, 2012, and 2014), about 4000 Palestinians were killed and more than 17 000 injured (412 killed and 1264 injured in 2006; 1383 killed and more than 5300 injured in 2009; 130 killed and 1399 injured in 2012; and 2251 killed and 11 231 injured in 2014). An unknown number of people had traumatic amputations of one or more extremities. Use of unmanned Israeli drones for surveillance and armed attacks on Gaza was evident, but exact figures on numbers of drone strikes on Gaza are not available...
February 21, 2018: Lancet
Eatimad Shalabi-Abbas, Saba Dweikat, Israa Al Gazawy, Sajeda Draghmah
BACKGROUND: Menstruation is a natural phenomenon that occurs throughout the reproductive life of every woman. The aim of this study was to explore knowledge and self-care practices among Palestinian adolescent girls during their menstrual period. Reproductive health issues in adolescent girls is an important but neglected area of Palestinian research. METHODS: For this cross-sectional study we recruited girls from grades seven, eight, and nine in the three biggest schools for girls in Nablus district...
February 21, 2018: Lancet
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