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"We don't really need a snorkel."
In the early days of scuba diving, the snorkel was considered an essential piece of equipment for breathing at the surface before and...

Michael Mutter
22. Feb. 20244 Min. Lesezeit


"Get high on your own supply" - but safely!
Readers wanted to know whether the Wim Hof method and holotropic breathwork are beneficial for freedivers. After discussing ice bathing...

Michael Mutter
15. Feb. 20244 Min. Lesezeit


Ice bathing, holotropic breathing and the Wim Hof method - beneficial for diving?
Ice bathing is very trendy and courses in breathing techniques are popping up like mould. The hype doesn't stop at the dekoblog either....

Michael Mutter
8. Feb. 20245 Min. Lesezeit


Vertigo and vomiting during a dive - decompression illness?
A diver suffered acute vertigo and unstoppable vomiting during a dive in a lake. After emergency care and multiple hyperbaric chamber...

Michael Mutter
1. Feb. 20244 Min. Lesezeit


Omega-3: everlasting hype with dire consequences for the sea
Omega-3 fatty acids have been recommended as a dietary supplement for decades due to their potential benefits for heart health, brain...

Michael Mutter
25. Jan. 20244 Min. Lesezeit


How much sonar can divers tolerate?
In an incident in international waters between the Australian and Chinese navies, tensions escalated in November last year when...

Michael Mutter
18. Jan. 20244 Min. Lesezeit


The little decompression theory 5 - diving at altitude
At altitude, the air pressure and hence the ambient pressure underwater are lower than at sea level. This leads to a lesser saturation of...

Michael Mutter
11. Jan. 20242 Min. Lesezeit


The little decompression theory 4 - deco-stops
If the inert gas pressure of a tissue is less than its maximum tolerated value for the water surface, it is possible to ascend directly...

Michael Mutter
4. Jan. 20243 Min. Lesezeit


The little decompression theory 3 - No decompression limit
No decompression limit (NDL) means that it is possible to ascend from depth directly to the surface without affecting the supersaturation...

Michael Mutter
28. Dez. 20233 Min. Lesezeit


The little decompression theory 2 - Practical application of supersaturation tolerance
The supersaturation tolerance was explained in the previous article. To recap: It represents the limit at which bubbles form in a tissue...

Michael Mutter
20. Dez. 20232 Min. Lesezeit


The little decompression theory I - Supersaturation tolerance
Every diving course teaches the saturation and desaturation of tissues with inert gases. Unfortunately, the concept of supersaturation...

Michael Mutter
14. Dez. 20236 Min. Lesezeit


Oxygen toxicity - a critical view of the "CNS-clock"
The CNS toxicity of oxygen represents a significant risk for recreational and technical diving. The "CNS-clock" is used to calculate this...

Michael Mutter
7. Dez. 20235 Min. Lesezeit


Air breaks during decompression: myth or sensible practice?
A reader of the dekoblog wanted to know the background of the air breaks that are instructed in the Trimix course. Good question! The...

Michael Mutter
30. Nov. 20233 Min. Lesezeit


The "deepest breath" - critical review of a risky stunt
I've been asked repeatedly for my opinion on this movie. Here it is. Warning: Contains spoilers! The Netflix film by Laura McGann from...

Michael Mutter
23. Nov. 20236 Min. Lesezeit


What are optimal gradient factors? Remarkable findings from the Belgian Navy.
Testing the default Gradient Factor settings of a commercially available dive computer (Shearwater Perdix™) by the Belgian Navy yielded...

Michael Mutter
16. Nov. 20233 Min. Lesezeit


The depth limits of diving
In recent years, extreme divers have set new depth records. In February 2023, for example, hydrogen was used with a rebreather for the...

Michael Mutter
9. Nov. 20233 Min. Lesezeit


Inner ear decompression syndrome - more common than thought
- and with a usual suspect as risk factor. Inner Ear Decompression Syndrome (IEDCS) is characterized by vestibular symptoms such as...

Michael Mutter
2. Nov. 20232 Min. Lesezeit


News about breath hold diving: Oxygen debt
Breath-hold diving (BHD) is becoming increasingly popular. 2 recent articles published in DHMJ shed more light on the physiology of apnea...

Michael Mutter
29. Okt. 20232 Min. Lesezeit


HRV and decompression stress
Can a decompression model be derived from Heart Rate Variability (HRV)? I recently read with great interest in the DAN newsletter the...

Michael Mutter
29. Okt. 20232 Min. Lesezeit


Can breath hold diving lead to decompression illness?
Breath hold diving (BHD) cannot lead to decompression illness. Is this paradigm still true today? Another article in the DHMJ deals with...

Michael Mutter
29. Okt. 20232 Min. Lesezeit
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