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Ultrasound lung "comets" increase after breath-hold diving
23 octobre 2010, LAMBRECHTS, Kate; GERMONPRÉ, Peter; Charbel, Brian; Cialoni, Danilo; Musimu, Patrick; Sponsiello, Nicola; Marroni, Alessandro; Pastouret, Fredéric; BALESTRA, Costantino,
- 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 ...
Effect of a single, open-sea, air scuba dive on human micro- and macrovascular function
15 août 2013, LAMBRECHTS, Kate; Pontier, Jean-Michel; BALESTRA, Costantino; Mazur, Aleksandra; Wang, Qiong; Buzzacott, Peter; Theron, Michaël; Mansourati, Jacques; Guerrero, François,
- 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 ...
Effect of oxygen-breathing during a decompression-stop on bubble-induced platelet activation after an open-sea air dive: oxygen-stop decompression
29 septembre 2013, Pontier, Jean-Michel; LAMBRECHTS, Kate,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Purpose: We highlighted a relationship between decompression-induced bubble formation and platelet micro-particle (PMP) release after a scuba air-dive. It is known that decompression protocol using oxygen-stop accelerates the washout of nitrogen loaded in tissues. The aim was to study the effect of oxygen deco-stop on bubble formation and cell-derived MP release.
Methods: Healthy experienced ...
Effect of decompression-induced bubble formation on highly trained divers microvascular function
07 novembre 2013, LAMBRECHTS, Kate; Pontier, Jean-Michel; Mazur, Aleksandra; Pontier, Jean-Michel; Buzzacott, Peter; Morin, Jean; Wang, Qiong; Theron, Michaël; Guerrero, François,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
We previously showed microvascular alteration of both endothelium-dependent and -independent reactivity after a single SCUBA dive. We aimed to study mechanisms involved in this postdive vascular dysfunction. Ten divers each completed three protocols: (1) a SCUBA dive at 400 kPa for 30 min; (2) a 41-min duration of seawater surface head immersed finning exercise to determine the effect of immersion ...
Effect of splenectomy on platelet activation and decompression sickness outcome in a rat model of decompression
01 septembre 2014, LAMBRECHTS, Kate; Pontier, Jean-Michel; Mazur, Aleksandra; Buzzacott, Peter; Goanvec, Christel; Wang, Qiong; Theron, Michaël; Belhomme, Marc; Guerrero, François,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Introduction: Splenic platelets have been recognized to have a greater prothrombotic potential than others platelets. We studied whether platelets released by splenic contraction could influence the severity and outcome of decompression sickness (DCS) and bubble-induced platelet activation.
Methods: Sixteen, male Sprague-Dawley rats were randomly assigned to either a control or a splenectomized ...
A ternary model of decompression sickness in rats
01 décembre 2014, Buzzacott, Peter; LAMBRECHTS, Kate; Mazur, Aleksandra; Wang, Qiong; Papadopoulou, Virginie; Theron, Michaël; BALESTRA, Costantino; Guerrero, François,
- 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, ...
Influence of decompression sickness on vasocontraction of isolated rat vessels
18 février 2015, Mazur, Aleksandra; LAMBRECHTS, Kate; Wang, Qiong; Belhomme, Marc; Theron, Michaël; Buzzacott, Peter; Guerrero, François,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Studies conducted in divers indicate that endothelium function is impaired following a dive even without decompression sickness (DCS). Our previous experiment conducted on rat isolated vessels showed no differences in endothelium-dependent vasodilation after a simulated dive even in the presence of DCS, while contractile response to phenylephrine was progressively impaired with increased decompression ...
Mechanism of action of antiplatelet drugs on decompression sickness in rats: a protective effect of anti-GPIIbIIIa therapy
15 mai 2015, LAMBRECHTS, Kate; Mazur, Aleksandra; Pontier, Jean-Michel; Theron, Michaël; Buzzacott, Peter; Wang, Qiong; Belhomme, Marc; Guerrero, François,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Literature highlights the involvement of disseminated thrombosis in the pathophysiology of decompression sickness (DCS). We examined the effect of several antithrombotic treatments targeting various pathways on DCS outcome: acetyl salicylate, prasugrel, abciximab, and enoxaparin. Rats were randomly assigned to six groups. Groups 1 and 2 were a control nondiving group (C; n = 10) and a control diving ...
Fluoxetine stimulates anti-inflammatory IL-10 cytokine production and attenuates sensory deficits in a rat model of decompression sickness
22 octobre 2015, Blatteau, Jean-Eric; De Maistre, Sébastien; LAMBRECHTS, Kate; Abraini, Jacques; Risso, Jean-Jacques; Vallée, Nicolas,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Despite "gold standard" hyperbaric oxygen treatment, 30% of patients suffering from neurological decompression sickness still exhibit incomplete recovery, including sensory impairments. Fluoxetine, a well-known antidepressant, is recognized as having anti-inflammatory effects in the setting of cerebral ischemia. In this study, we focused on the assessment of sensory neurological deficits and measurement ...
Colonic Fermentation Promotes Decompression sickness in Rats
08 février 2016, Demaistre, Sébastien; Vallée, Nicolas; Gempp, Emmanuel; LAMBRECHTS, Kate; Louge, Pierre; Duchamp, Claude; Blatteau, Jean-Eric,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Massive bubble formation after diving can lead to decompression sickness (DCS). During dives with hydrogen as a diluent for oxygen, decreasing the body's H2 burden by inoculating hydrogen-metabolizing microbes into the gut reduces the risk of DCS. So we set out to investigate if colonic fermentation leading to endogenous hydrogen production promotes DCS in fasting rats. Four hours before an experimental ...