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Static Metabolic Bubbles as Precursors of Vascular Gas Emboli During Divers' Decompression: A Hypothesis Explaining Bubbling Variability
30 juillet 2019, Imbert, Jean Pierre; Egi, Salih Murat; GERMONPRÉ, Peter; BALESTRA, Costantino,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Introduction: The risk for decompression sickness (DCS) after hyperbaric exposures (such as SCUBA diving) has been linked to the presence and quantity of vascular gas emboli (VGE) after surfacing from the dive. These VGE can be semi-quantified by ultrasound Doppler and quantified via precordial echocardiography. However, for an identical dive, VGE monitoring of divers shows variations related to ...
Early detection of diving-related cognitive impairment of different nitrogen-oxygen gas mixtures
30 juin 2019, Lafère, Pierre; HEMELRYCK, Walter; GERMONPRÉ, Peter; Matity, Luba; Guerrero, François; BALESTRA, Costantino,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
NTRODUCTION: Cognitive impairment related to inert gas narcosis (IGN) is a threat to diving safety and operations at depth that might be reduced by using enriched air nitrox (EANx) mixtures. Using critical flicker fusion frequency (CFFF), a possible early detection of cognitive abilities/cerebral arousal impairment when breathing different oxygen (O2) fractions was investigated. METHODS: Eight male ...
Diving physiopathology: the end of certainties? Food for thought
27 juin 2019, BALESTRA, Costantino; GERMONPRÉ, Peter; Rocco, Monica; Biancofiore, Giovanni; Kot, Jacek,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Our understanding of decompression physiopathology has slowly improved during this last decade and some uncertainties have disappeared. A better understanding of anatomy and functional aspects of Patent Foramen Ovale (PFO) have slowly resulted in a more liberal approach toward the medical fitness to dive for those bearing a PFO. Circulating vascular gas emboli (VGE) are considered the key actors in ...
Critical Flicker Fusion Frequency: A Marker of Cerebral Arousal During Modified Gravitational Conditions Related to Parabolic Flights
02 octobre 2018, BALESTRA, Costantino; Machado, Marie-Laure; Theunissen, Sigrid; BALESTRA, Ambre; Cialoni, Danilo; Clot, Christian; Besnard, Stépane; Kammacher, Laura; Delzenne, Julie; GERMONPRÉ, Peter; Lafère, Pierre,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
In situ evaluation of human brain performance and arousal remains challenging during operational circumstances, hence the need for a rapid, reliable and reproducible tool. Here we hypothesized that the Critical flicker fusion frequency (CFFF) reflecting/requiring visual integration, visuo-motor skills and decision-taking process might be a powerful, fast and simple tool in modified gravity environments. ...
Decreased Incidence of Pulmonary Barotrauma After Discontinuation of Emergency Free Ascent Training
22 août 2018, Lafère, Pierre; GERMONPRÉ, Peter; Guerrero, François; Marroni, Alessandro; BALESTRA, Costantino,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
INTRODUCTION: Because a significant association between training to perform emergency free ascent (EFA) and the occurrence of pulmonary barotrauma (PBT) was demonstrated in 2006, the Belgian Underwater Federation (BUF) decided to discontinue this procedure. An evaluation was needed 10 yr after the implementation of this change. METHODS: All medical records with a diagnosis of PBT that occurred in ...
Scuba Physiological: Think You Know All About Scuba Medicine? Think again!
01 décembre 2017, Pridmore, Simon; Balestra, Costantino; GERMONPRÉ, Peter,
- HE Bruxelles Brabant
,
- Livre/Ouvrage ou monographie
Livre/Ouvrage ou monographie
"This book makes it easy to understand the latest discoveries in diving research. You will enjoy reading about our current understanding of what happens to our bodies when we dive." JP Imbert: Decompression designer and technical diving pioneer
"As a doctor with a fair history and understanding of diving medicine and diving physiology I found the book interesting. It's the sort of book I would ...
Patent Foramen Ovale (PFO), Personality Traits, and Iterative Decompression Sickness. Retrospective Analysis of 209 Cases
20 août 2017, Lafère, Pierre; BALESTRA, Costantino; Caers, Dirk; GERMONPRÉ, Peter,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Introduction: 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 ...
Objective vs. Subjective Evaluation of Cognitive Performance During 0.4-MPa Dives Breathing Air or Nitrox
19 avril 2017, GERMONPRÉ, Peter; BALESTRA, Costantino; Hemelryck, Walter; Buzzacott, Peter; Lafère, Pierre,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
BACKGROUND: 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 ...
Diving deeper into SCUBA Science
12 février 2017, BALESTRA, Costantino; GERMONPRÉ, Peter,
- HE Bruxelles Brabant
,
- Livre/Ouvrage ou monographie
Livre/Ouvrage ou monographie
The 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 ...
Preconditioning to Reduce Decompression Stress in Scuba Divers
Article scientifique
BACKGROUND: 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 ...