Introduction/Background The estimated death rate among rebreather divers is high at 1.8 to 3.8 deaths per 100,000 rebreather dives, and the activity popularity is growing. A previous ep-idemiological study from the French Navy has shown that among 54 divers who lost consciousness during a dive, none died, and only two had a moderate water inspiration while using a Mouthpiece Retaining Strap (MRS) in a dive team configuration. However, recreational and technical divers express less willingness to use a MRS. Drowning is a major cause of death among them. Therefore, our main objective during this study was to better understand the use of MRS among divers and to evaluate the possible correlation between prop-er training with the MRS and its voluntary use.

Introduction: Long COVID syndrome is a major health issue. Multiple treatments have been proposed but efficacy is inadequately investigated. Hyperbaric oxygen therapy (HBOT) has been promoted based on a small number of publications. As there is potential for a placebo effect and the financial cost of HBOT is high, we sought to investigate the effects of HBOT in Long COVID in a randomised trial.

Introduction: Rebreather diving carries a high fatality rate (estimated 1.8–3.8 deaths per 100,000 dives), yet its popularity is growing. Among 54 French military divers who lost consciousness underwater, none died when using a mouthpiece retaining strap (MRS) in a team diving setup. Despite this, MRS use remains limited among recreational divers for whom drowning is a major cause of death. This study assessed knowledge, perceptions, and training regarding MRS use within the rebreather diving community.

Title original: Stellenwert der hyperbaren Sauerstofftherapie für die Behandlung chronischer Wunden The physical and biological effects of hyperbaric oxygen therapy (HBOT) are used to treat various medical conditions, such as decompression sickness after diving accidents or in cases of gas embolism or CO-poisoning.

Introduction Scientific diving is often done as weeks-long expedition diving. CCR diving allows for longer and deeper dives without disturbing marine life. However, this intensive diving work puts human physiology under stress. There is little evidence regarding how humans adapt to diving stress over an extended period and whether there is an accumulation of decompression stress. The aim of this study was to observe and analyze the effects of a 31-day period of repeated deep and long CCR dives on cardiopulmonary physiology.