Middle-ear barotrauma after hyperbaric oxygen therapy.
A nice little paper i wrote with Jacques Bessereau.
http://www.ncbi.nlm.nih.gov/pubmed/20737927
Undersea Hyperb Med. 2010 Jul-Aug;37(4):203-8.
Middle-ear barotrauma after hyperbaric oxygen therapy.
Bessereau J, Tabah A, Genotelle N, Français A, Coulange M, Annane D.
BACKGROUND: Middle-ear barotrauma (MEB) is one of the most common side effects of hyperbaric oxygen therapy (HBO2). The incidence of MEB has been shown to vary between treatment centers and patients. This study was aimed to determine which patients are at high risk of MEB.
MATERIALS AND METHODS: Prospective study including all the patients treated in a multiplace HBO2 chamber between January and December 2005. Scoring of MEB before and after HBO2 by otoscopy was performed using the Haines and Harris classification.
RESULTS: We included 130 patients: 53 Males, 37.5 +/- 20.5 years old; 76% were treated for CO poisoning, 11% for iatrogenic gas embolism, 12% for decompression sickness and 4% for necrotizing soft tissue infection. 13% were intubated. MEB occurred in 13.6% of the patients (12.4% of the conscious and 24.4% of the intubated patients, p = 0.26). Risk factors for MEB were: repetitive treatments and difficulties with pressure equalization. There was no influence of age, sex or mechanical ventilation on the occurrence of MEB.
CONCLUSIONS: MEB induced by HBO2 occurred in 13.6% of the patients. There is no difference in incidence when comparing intubated and non-intubated patients. In non-comatose patients, difficulties with equalizing pressure were predictive of MEB.
HDR processing - Photomatix 4 beta vs Photoshop CS5 HDR Pro
Photomatix just released their beta 4.0. I have been expecting it for a loooong time, as photoshop CS 5 introduced to a new era in HDR with the ability to remove ghosting and camera shake and producing sharp images from handheld brackets.
My first results show worse ghost removal, more noise, but much better tone maping in photomatix.
what works best for me is doing the HDR fusion in PS CS5, save a 32Bit EXR image and tonemape it with photomatix.
Photomatix Tonemaped
Photomatix Tonemaped 100% crop
Photoshop CS5 Tonemaped
Photoshop CS5 Tonemaped 100% crop
Fused in PS CS5 and Tonemaped with photomatix beta4
Fused in PS CS5 and Tonemaped with photomatix beta4
Note that all 3 versions have been processed with Lightroom 3. The PS CS5 version required lots more work with the sky to make it pop, while Photomatix version is almost straight from tonemaping, i only made very basic adjustments.
Made from 3 bracketed shots handheld with a 1ds3 – 24-105 lens @ 24mm f/8. 1/50 – 1/400 – 1/3200 ISO 100
we should probably wait for the final version of photomatix and test this some more before making conclusions.
Whale shark pictures
Here is a few more whale shark pictures from Isla Mujeres
I particulary like this one, you can see the bonito eggs flowing in it’s mouth while it’s feeding
Isla Mujeres, suite
Voici une autre photo de Nathalie cette fois, qui montre un peu les proportions et la situation
Quelques autres photos et videos (par nous et les copains) peuvent etre vues sur wetpixel: http://wetpixel.com/forums/index.php?showtopic=37001
Voici Nathalie avec le Whale Shark
Et une autre
Nathalie avec le Requin Baleine
Pas facile de montrer ce que l’on ressent au milieu d’un troupeau d’environ 300 requins Baleine qui nagent la bouche ouverte pour gober un maximum d’oeufs de bonite
Et une dernière silhouette du dessous juste pour le plaisir
Les meilleures images sont probablement cachées dans le disque dur de mon portable, je suis impatient de pouvoir voir tout ca tranquilement à la maison!
la semaine prochaine… photos de cenotes, prises la semaine dernière !
Isla Mujeres
On est à Isla Mujeres, au Mexique, juste pour quelques jours avec les Requins Baleine. Après simplement trois jours je peux dire que c’est une expérience des plus extraordinaires. Il y a ici une agrégation de Requins Baleine, qui viennent manger les oeufs de bonite pondus chaque année au large de l’ile.
Hier il y avait a priori jusque 500 requins baleine dans une zone de quelques km2… absolument incroyable!
voici la première photo pour allécher, les autres suivront bientôt.
Find dust Lightroom preset
I made this preset a long time ago from instructions i found somewhere on the web.
Very useful to see if there is dust on your sensor and if it needs cleaned
Règle des cinq fautes progressives
(source: les royaumes combattants sous la dynastie des Tcheou, 1050-249 av. JC)
1ère faute: "Ne pas savoir que des hommes compétents existent dans le royaume"
2ème faute (plus grave): "Savoir qu’ils existent mais ne pas les utiliser"
3ème faute (très grave): "Les utiliser mais à mauvais escient"
4ème faute (extrêmement grave): "Utiliser des hommes compétents à bon escient mais les piétiner ou les laisser piétiner"
5ème faute (impardonnable): "Les laisser passer à l’ennemi"
