How to Survive 33 min after the Umbilical of a Saturation Diver Severed at a Depth of 90 msw?
In 2012, a severe accident happened during the mission of a professional saturation diver working at a depth of 90 m in the North Sea. The dynamic positioning system of the diver support vessel crashed, and the ship drifted away from the working place, while one diver’s umbilical became snagged on a...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Healthcare |
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| Online Access: | https://www.mdpi.com/2227-9032/10/3/453 |
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| author | Sven Dreyer Andreas Deussen Dietmar Berndt Jochen D. Schipke |
| author_facet | Sven Dreyer Andreas Deussen Dietmar Berndt Jochen D. Schipke |
| author_sort | Sven Dreyer |
| collection | DOAJ |
| description | In 2012, a severe accident happened during the mission of a professional saturation diver working at a depth of 90 m in the North Sea. The dynamic positioning system of the diver support vessel crashed, and the ship drifted away from the working place, while one diver’s umbilical became snagged on a steel platform and was severed. After 33 min, he was rescued into the diving bell, without exhibiting any obvious neurological injury. In 2019, the media and a later ‘documentary’ film suggested that a miracle had happened to permit survival of the diver once his breathing gas supply was limited to only 5 min. Based on the existing data and phone calls with the diver concerned (Dc), the present case report tries to reconstruct, on rational grounds, how Dc could have survived after he was cut off from breathing gas, hot water, light and communication while 90 m deep at the bottom of the sea. Dc carried bail-out heliox (86/14) within two bottles (2 × 12 L × 300 bar: 7200 L). Calculating Dc’s varying per-minute breathing gas consumption over time, both the decreased viscosity of the helium mix and the pressure-related increase in viscosity did not exhibit a breathing gas gap. Based on the considerable respiratory heat loss, the core temperature was calculated to be as low as 28.8 °C to 27.2 °C after recovery in the diving bell. In accordance with the literature, such values would be associated with impaired or lost consciousness, respectively. Relocating Dc on the drilling template by using a remotely operated vehicle (ROV), the transport of the victim to the bell and subsequent care in the hyperbaric chamber must be regarded as exemplary. We conclude that, based on rational arguments and available literature data, Dc’s healthy survival is not a miracle, as it can be convincingly explained by means of reliable data. Remaining with a breathing gas supply sufficient for five minutes only would not have ended in a miracle but would have ended in death by suffocation. Nevertheless, survival of such an accident may appear surprising, and probably the limit for a healthy outcome was very close. We conclude, in addition, that highly effective occupational safety measures, in particular the considerable bail-out heliox reserve, secured the healthy survival. Nevertheless, the victim’s survival is likely to be due to his excellent diving training, together with many years of diving routine. The rescue action of the second diver and Dc’s retrieval by the ROV operator are also suggestive of the behavior of carefully selected crew members with the high degree of professional qualification needed to correctly function in a hostile environment. |
| first_indexed | 2024-03-09T19:46:40Z |
| format | Article |
| id | doaj.art-bdadb12a8dc44d2397e575fc8a1a3f51 |
| institution | Directory Open Access Journal |
| issn | 2227-9032 |
| language | English |
| last_indexed | 2024-03-09T19:46:40Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Healthcare |
| spelling | doaj.art-bdadb12a8dc44d2397e575fc8a1a3f512023-11-24T01:21:46ZengMDPI AGHealthcare2227-90322022-02-0110345310.3390/healthcare10030453How to Survive 33 min after the Umbilical of a Saturation Diver Severed at a Depth of 90 msw?Sven Dreyer0Andreas Deussen1Dietmar Berndt2Jochen D. Schipke3Hyperbaric Oxygen Therapy, University Hospital Düsseldorf, Moorenstrasse 5, 40225 Düsseldorf, GermanyInstitute of Physiology, Medical Faculty Carl Gustav Carus, TU Dresden, 01307 Dresden, GermanyDiving Equipment–Accident Investigation/Technology Evaluation, 76297 Stutensee, GermanyForschungsgruppe Experimentelle Chirurgie, Universitäts-Klinikum Düsseldorf, Moorenstrasse 5, 40225 Düsseldorf, GermanyIn 2012, a severe accident happened during the mission of a professional saturation diver working at a depth of 90 m in the North Sea. The dynamic positioning system of the diver support vessel crashed, and the ship drifted away from the working place, while one diver’s umbilical became snagged on a steel platform and was severed. After 33 min, he was rescued into the diving bell, without exhibiting any obvious neurological injury. In 2019, the media and a later ‘documentary’ film suggested that a miracle had happened to permit survival of the diver once his breathing gas supply was limited to only 5 min. Based on the existing data and phone calls with the diver concerned (Dc), the present case report tries to reconstruct, on rational grounds, how Dc could have survived after he was cut off from breathing gas, hot water, light and communication while 90 m deep at the bottom of the sea. Dc carried bail-out heliox (86/14) within two bottles (2 × 12 L × 300 bar: 7200 L). Calculating Dc’s varying per-minute breathing gas consumption over time, both the decreased viscosity of the helium mix and the pressure-related increase in viscosity did not exhibit a breathing gas gap. Based on the considerable respiratory heat loss, the core temperature was calculated to be as low as 28.8 °C to 27.2 °C after recovery in the diving bell. In accordance with the literature, such values would be associated with impaired or lost consciousness, respectively. Relocating Dc on the drilling template by using a remotely operated vehicle (ROV), the transport of the victim to the bell and subsequent care in the hyperbaric chamber must be regarded as exemplary. We conclude that, based on rational arguments and available literature data, Dc’s healthy survival is not a miracle, as it can be convincingly explained by means of reliable data. Remaining with a breathing gas supply sufficient for five minutes only would not have ended in a miracle but would have ended in death by suffocation. Nevertheless, survival of such an accident may appear surprising, and probably the limit for a healthy outcome was very close. We conclude, in addition, that highly effective occupational safety measures, in particular the considerable bail-out heliox reserve, secured the healthy survival. Nevertheless, the victim’s survival is likely to be due to his excellent diving training, together with many years of diving routine. The rescue action of the second diver and Dc’s retrieval by the ROV operator are also suggestive of the behavior of carefully selected crew members with the high degree of professional qualification needed to correctly function in a hostile environment.https://www.mdpi.com/2227-9032/10/3/453saturation divinghelioxaccidentumbilicalrespiratory heat loss |
| spellingShingle | Sven Dreyer Andreas Deussen Dietmar Berndt Jochen D. Schipke How to Survive 33 min after the Umbilical of a Saturation Diver Severed at a Depth of 90 msw? Healthcare saturation diving heliox accident umbilical respiratory heat loss |
| title | How to Survive 33 min after the Umbilical of a Saturation Diver Severed at a Depth of 90 msw? |
| title_full | How to Survive 33 min after the Umbilical of a Saturation Diver Severed at a Depth of 90 msw? |
| title_fullStr | How to Survive 33 min after the Umbilical of a Saturation Diver Severed at a Depth of 90 msw? |
| title_full_unstemmed | How to Survive 33 min after the Umbilical of a Saturation Diver Severed at a Depth of 90 msw? |
| title_short | How to Survive 33 min after the Umbilical of a Saturation Diver Severed at a Depth of 90 msw? |
| title_sort | how to survive 33 min after the umbilical of a saturation diver severed at a depth of 90 msw |
| topic | saturation diving heliox accident umbilical respiratory heat loss |
| url | https://www.mdpi.com/2227-9032/10/3/453 |
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