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A fully automated method for late ventricular diastole frame selection in post-dive echocardiography without ECG gatingEr
02 mars 2021,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Venous gas emboli (VGE) are often quantified as a marker of decompression stress on echocardiograms. Bubble-counting has been proposed as an easy to learn method, but remains time-consuming, rendering large dataset analysis impractical. Computer automation of VGE counting following this method has therefore been suggested as a means to eliminate rater bias and save time. A necessary step for this ...
Relationships between plasma lipids, proteins, surface tension and post-dive bubbles
13 février 2015,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Decompression 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 ...
The "normobaric oxygen paradox": a new tool for the anesthetist?
10 janvier 2014,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Hypoxia is the natural trigger for endogenous EPO production but recently the use of intermittent hyperoxia to stimulate EPO has been postulated and this phenomenon has been called the "normobaric oxygen paradox" (NOP). The "NOP" is a mechanism by which oxygen regulates the expression of the Hypoxia Inducible Factor 1 alpha (HIF-1alpha). The HIF-1alpha-depending gene regulation is responsible for ...
Cutis Marmorata skin decompression sickness is a manifestation of brainstem bubble embolization, not of local skin bubbles
10 avril 2015,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
"Cutis Marmorata" skin symptoms after diving, most frequently in the form of an itching or painful cutaneous red-bluish discoloration are commonly regarded as a mild form of decompression sickness (DCS), and treated with oxygen inhalation without reverting to hyperbaric recompression treatment. It has been observed that the occurrence of Cutis Marmorata is frequently associated with the presence of ...
Flying after diving: should recommendations be reviewed? In-flight echocardiographic study in bubble-prone and bubble-resistant divers
13 mai 2015,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
INTRODUCTION: Inert gas accumulated after multiple recreational dives can generate tissue supersaturation and bubble formation when ambient pressure decreases. We hypothesized that this could happen even if divers respected the currently recommended 24-hour pre-flight surface interval (PFSI). METHODS: We performed transthoracic echocardiography (TTE) on a group of 56 healthy scuba divers (39 male, ...
Decompression induced bubble dynamics on ex vivo fat and muscle tissue surfaces with a new experimental set up
04 avril 2015,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Vascular gas bubbles are routinely observed after scuba dives using ultrasound imaging, however the precise formation mechanism and site of these bubbles are still debated and growth from decompression in vivo has not been extensively studied, due in part to imaging difficulties. An experimental set-up was developed for optical recording of bubble growth and density on tissue surface area during ...
Qu'est-ce qui va changer? - Capitre dans Coeur et Plongée
10 août 2017,
- HE Bruxelles Brabant
,
- Livre/Ouvrage ou monographie
Livre/Ouvrage ou monographie
Le monde sous-marin est devenu accessible au plus grand nombre. Les méthodes de plongée se sont diversifiées, la population de plongeurs aussi... Mais la plongée demeure une activité à risques. Les pathologies cardiaques peuvent faire courir des dangers importants, non seulement au plongeur, mais aussi à tous ceux impliqués en cas d'assistance. Or, les données concernant les décès en plongée mettent ...
Effect of a single, open-sea, air scuba dive on human micro- and macrovascular function
15 août 2013,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Purpose: Previous studies have shown that bubble formation induced endothelial damage on conduit arteries. We aim to evaluate the effect of diving on microvascular and macrovascular function.
Methods: Nine divers took part in a SCUBA dive at 30 msw (400 kPa), for 30 min of bottom time. Pre- and post-dive, they underwent an assessment of endothelial-dependent (acetylcholine) and endothelial-independent ...
A ternary model of decompression sickness in rats
01 décembre 2014,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Background: 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,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
The 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 ...