HE2B - HE: Recent submissions
Voici les éléments 81-100 de 138
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A ternary model of decompression sickness in rats
01 décembre 2014, Buzzacott, Peter; ; Mazur, Aleksandra; Wang, Qiong; Papadopoulou, Virginie; Theron, Michaël; BALESTRA, Costantino
; Guerrero, François, HE Bruxelles Brabant
Article scientifiqueBackground: Decompression sickness (DCS) in rats is commonly modelled as a binary outcome. The present study aimed to develop a ternary model of predicting probability of DCS in rats, (as no-DCS, survivable-DCS or death), based upon the compression/decompression profile and physiological characteristics of each rat. Methods: A literature search identified dive profiles with outcomes no-DCS, ... -
Ultrasound lung "comets" increase after breath-hold diving
23 octobre 2010, ; ; Charbel, Brian; Cialoni, Danilo; Musimu, Patrick; Sponsiello, Nicola; Marroni, Alessandro; Pastouret, Fredéric; BALESTRA, Costantino, HE Bruxelles Brabant
Article scientifiqueThe purpose of the study was to analyze the ultrasound lung comets (ULCs) variation, which are a sign of extra-vascular lung water. Forty-two healthy individuals performed breath-hold diving in different conditions: dynamic surface apnea; deep variable-weight apnea and shallow, face immersed without effort (static maximal and non-maximal). The number of ULCs was evaluated by means of an ultrasound ... -
Oxidative stress in breath-hold divers after repetitive dives
08 juin 2013, ; Sponciello, Nicholas; Rozloznik, Miroslav; ; Guerrero, François; Cialoni, Danilo; BALESTRA, Costantino, HE Bruxelles Brabant
Article scientifiqueIntroduction: Hyperoxia causes oxidative stress. Breath-hold diving is associated with transient hyperoxia followed by hypoxia and a build-up of carbon dioxide (CO₂), chest-wall compression and significant haemodynamic changes. This study analyses variations in plasma oxidative stress markers after a series of repetitive breath-hold dives. Methods: Thirteen breath-hold divers were asked to perform ... -
The 'normobaric oxygen paradox': does it increase haemoglobin?
14 juin 2012, De Bels, David; ; Devriendt, Jacques; ; Lafère, Pierre; Valsamis, Joseph; ; Meeus, Philippe; BALESTRA, Costantino, HE Bruxelles Brabant
Article scientifiqueBackground: A novel approach to increasing erythropoietin (EPO) using oxygen (O2) (the 'normobaric oxygen paradox') has been reported in healthy volunteers. We investigated whether the EPO increase is sufficient to induce erythropoiesis by comparing two protocols of O2 administration. Methods: We compared the effect of daily versus alternate days 100% O2, breathed for 30 minutes, on haemoglobin ... -
The effect of a passive stretch training protocol on performance during a drop jump in humans
15 juin 2013, Lévénez, Morgan; ; Bottero, Antoine; ; Bruyère, A; Tinlot, Arnaud; BALESTRA, Costantino; Provyn, Steven, HE Bruxelles Brabant
Article scientifiqueAim: Our study's aim is to show how a five-week stretch training protocol, based on passive stretching, can change muscle performance during a drop jump (stretch shortening cycle). Methods: This study observes in 8 healthy subjects (four males and four females), the effect of a 5-week passive stretch training protocol on the stretch shortening cycle (SSC) during the performance of a drop jump, ... -
Effect of tetrahydrobiopterin and exercise training on endothelium-dependent vasorelaxation in SHR
02 juin 2013, Guerrero, François; Sanéo, Thioub; Goanvec, Christelle; ; Feray, Annie; BALESTRA, Costantino; Mansourati, Jacques, HE Bruxelles Brabant
Article scientifiqueWe examined whether the improvement of impaired NO-dependent vasorelaxation by exercise training could be mediated through a BH4-dependent mechanism. Male spontaneously hypertensive rats (SHR, n = 20) and Wistar-Kyoto rats (WKY, n = 20) were trained (Tr) for 9 weeks on a treadmill and compared to age-matched sedentary animals (Sed). Endothelium-dependent vasorelaxation (EDV) was assessed with ... -
A red orange extract modulates the vascular response to a recreational dive: a pilot study on the effect of anthocyanins on the physiological consequences of scuba diving
07 novembre 2015, BALESTRA, Costantino; Cimino, Francesco; ; ; Provyn, Steven; Canali, Raffaella; Bonina, Andrea; Virgili, Fabio, HE Bruxelles Brabant
Article scientifiqueNutritional antioxidants have been proposed as an expedient strategy to counter the potentially deleterious effects of scuba diving on endothelial function, flow-mediated dilation (FMD) and heart function. Sixteen volunteers performing a single standard dive (20 min at 33 m) according to US Navy diving procedures were randomly assigned to two groups: one was administered with two doses of 200 mg of ... -
Recherche sur les pratiques de formation liées aux activités d'intégration professionnelle à l'intention de futurs éducateurs spécialisés
01 juin 2015, HE Bruxelles BrabantArticle scientifiqueCet article a pour objectif de décrire un processus de recherche engagé sur la formation pratique d’éducateurs sociaux en Belgique francophone dans le cadre d’une association dénommée Form’Educ. Cela se passe dans un groupe de huit Hautes-Ecoles engagées ensemble dans un projet de recherche pendant cinq ans (2011-2015) dans le but d'échanger leurs pratiques de formation concernant la formation ... -
Relationships between plasma lipids, proteins, surface tension and post-dive bubbles
13 février 2015, Schellaert, Nicolas; Rolzoznik, Miroslav; BALESTRA, Costantino, HE Bruxelles Brabant
Article scientifiqueDecompression sickness (DCS) in divers is caused by bubbles of inert gas. When DCS occurs, most bubbles can be found in the venous circulation: venous gas emboli (VGE). Bubbles are thought to be stabilized by low molecular weight surfactant reducing the plasma-air surface tension (γ). Proteins may play a role as well. We studied the interrelations between these substances, γ and VGE, measured before ... -
Diving deeper into SCUBA Science
Livre/Ouvrage ou monographieThe editors of and authors of this book are a cadre of scientists and physicians with broad experience and knowledge of diving physiology and decompression theory. As is often the case, it requires a group effort to succeed in advancing practical knowledge. The colloquialism "the whole is greater than the sum of its parts" is often true and the PHYPODE Reasearch Group epitomizes this concept. By ... -
Do Environmental Conditions Contribute to Narcosis Onset and Symptom Severity?
Article scientifiqueAlthough many factors contributing to inert gas narcosis onset and severity have been put forward, the available evidence is not particularly strong. Using objective criteria, we have assessed brain impairment associated with narcosis under various environmental diving conditions. 40 volunteers performed a no-decompression dive (33 m for 20 min) either in a dry chamber, a pool or open sea. They were ... -
Effects of oxygen-enriched air on cognitive performance during SCUBA-diving - an open-water study
12 avril 2017, Brebeck, Anne-Kathrin; Deussen, Andreas; Schmitz-Pfeiffer, Henning; Range, Ursula; BALESTRA, Costantino; Cleveland, Sinclair; Schipke, Jochen, HE Bruxelles Brabant
Article scientifiqueBackround: Nitrogen narcosis impairs cognitive function, a fact relevant during SCUBA-diving. Oxygen-enriched air (nitrox) became popular in recreational diving, while evidence of its advantages over air is limited. AIM: Compare effects of nitrox28 and air on two psychometric tests. METHODS: In this prospective, double-blind, open-water study, 108 advanced divers (38 females) were randomized to an ... -
Evidence of Heritable Determinants of Decompression Sickness in Rats
22 juillet 2017, Lautridou, Jacky; Buzzacott, Peter; Belhomme, Marc; Dugrenot, Emmanuel; Lafère, Pierre; BALESTRA, Costantino; Guerrero, François, HE Bruxelles Brabant
Article scientifiqueNTRODUCTION: Decompression sickness (DCS) is a complex and poorly understood systemic disease caused by inadequate desaturation following a decrease of ambient pressure. Strong variability between individuals is observed for DCS occurrence. This raises questions concerning factors that may be involved in the inter-individual variability of DCS occurrence. This study aimed to experimentally assess ... -
Dive Risk Factors, Gas Bubble Formation, and Decompression Illness in Recreational SCUBA Diving: Analysis of DAN Europe DSL Data Base
10 mai 2017, Cialoni, Danilo; Pieri, Massimo; BALESTRA, Costantino; Marroni, Alessandro, HE Bruxelles Brabant
Article scientifiqueIntroduction: The popularity of SCUBA diving is steadily increasing together with the number of dives and correlated diseases per year. The rules that govern correct decompression procedures are considered well known even if the majority of Decompression Sickness (DCS) cases are considered unexpected confirming a bias in the "mathematical ability" to predict DCS by the current algorithms. Furthermore, ... -
Preconditioning to Reduce Decompression Stress in Scuba Divers
Article scientifiqueBACKGROUND: Using ultrasound imaging, vascular gas emboli (VGE) are observed after asymptomatic scuba dives and are considered a key element in the potential development of decompression sickness (DCS). Diving is also accompanied with vascular dysfunction, as measured by flow-mediated dilation (FMD). Previous studies showed significant intersubject variability to VGE for the same diving exposure and ... -
Correlation between Patent Foramen Ovale, cerebral “lesions” and neuropsychometric testing in experienced sports divers: does diving damage the brain?
Article scientifiqueSCUBA diving exposes divers to decompression sickness (DCS). There has been considerable debate whether divers with a Patent Foramen Ovale of the heart have a higher risk of DCS because of the possible right-to-left shunt of venous decompression bubbles into the arterial circulation. Symptomatic neurological DCS has been shown to cause permanent damage to brain and spinal cord tissue; it has been ... -
Objective vs. Subjective Evaluation of Cognitive Performance During 0.4-MPa Dives Breathing Air or Nitrox
19 avril 2017, ; BALESTRA, Costantino; Hemelryck, Walter; Buzzacott, Peter; Lafère, Pierre, HE Bruxelles Brabant
Article scientifiqueBACKGROUND: Divers try to limit risks associated with their sport, for instance by breathing enriched air nitrox (EANx) instead of air. This double blinded, randomized trial was designed to see if the use of EANx could effectively improve cognitive performance while diving. METHODS: Eight volunteers performed two no-decompression dry dives breathing air or EANx for 20 min at 0.4 MPa. Cognitive ... -
Patent Foramen Ovale (PFO), Personality Traits, and Iterative Decompression Sickness. Retrospective Analysis of 209 Cases
Article scientifiqueIntroduction: There is a need to evaluate the influence of risk factors such as patency of foramen ovale (PFO) or "daredevil" psychological profile on contra-indication policy after a decompression sickness (DCS). Methods: By crossing information obtained from Belgian Hyperbaric Centers, DAN Emergency Hotline, the press, and Internet diving forums, it was possible to be accountable for the majority ... -
Evaluation des effets de l’activité physique sur le système lymphatique de patientes avec lymphoedème secondaire à une chirurgie de cancer du sein
septembre 2017, HE Bruxelles BrabantArticle scientifiqueObjectivation par lymphoscintigraphie en trois phases du fonctionnement des vaisseaux lymphatiques de femmes opérées du cancer du sein. -
Lymphatic Drainages to the Paravertebral and Pararenal Lymph Nodes in Breast Cancer Patients
juin 2017, HE Bruxelles BrabantArticle scientifiqueVoies de drainage particulière après chirurgie du cancer du sein