Physiology of Deep Sea Diving and Other Hyperbaric Conditions

Physiology of Deep Sea Diving and Other Hyperbaric Conditions

Department of Physiology

DMSF 2009True or False answer key

1. T As pressure increases, volume decreases this is a principle of Boyle's law

2. T For every 33 fsw, 1 ATA is increased for the absolute pressure.

3. T Arterial gas embolism is a problem of boyles law

4. T When divers venture the great depths of the ocean, past 80-100, they will usually experience joviality known as acute oxygen toxicity

5. F The high partial pressure of Oxygen causes Narcosis at greater depths

6. T As pressure increases, volume decreases, density increases.

7. F For a free diver, lungs will reduce its volume the moment he explores the depths of the ocean. He will then experience, nitrogen bubbles

8. F In acute oxygen toxicity, the divers/patients lungs is affected

9. F In chronic oxygen toxicity, the divers/patients brain is affected

10. F Nitrogen is also affected by increase pressure that is why, divers develop arterial gas embolism

11. T One of the symptoms of DCS is joint pains which accounts for about 90% of DCS signs and symptoms

12. T Decompression is being used by recreational divers, commercial and military divers as well as hyperbaric chamber treatments

13. T Helium has a lighter molecular weight that could be used as breathing gas for excursion to extreme depths as in oil explorations and experimental diving units of the Navys of the world.

14. F SCUBA apparatus is a close circuit underwater breathing apparatus

15. T What you will be experiencing in your scuba activity (if allowed) this January is a recreational diving activity and not a commercial diving activity

16. T HBO therapy is used for decompression sickness and other medical indications such as thermal burns, delayed effects of radiation, wound healing, carbon monoxide poisoning, arterial gas embolism, refractory Osteomyelitis etc.

17. T HBO is utilizing the high partial pressure of Oxygen to be dissolved in the plasma of the blood and will be utilized by the hypoxic tissues involved

18. T HBO therapy is administered using a monoplace chamber or a multiplace chamber

19. T Cigarette smoking before diving could increase the partial pressure of Carbon dioxide and can potentially cause poisoning and so it is discourage for SCUBA enthusiast

20. T Hyperbaric Oxygen Therapy is now available at the Davao Medical School Foundation Hospital and is now ready for use for Diving Accidents and other Undersea Hyperbaric Medicine Society (UHMS) approved indications