Understanding Decompression Illness and the Importance of Emergency Assistance Plans

Amy Jellison
19 hours ago
4 min read

Scuba diving in Cozumel offers breathtaking underwater views and vibrant marine life, attracting divers from around the world. Yet, beneath the beauty lies a serious risk that every diver must understand: decompression illness. Knowing how to prevent it and what to do in an emergency can save lives. This post explains decompression illness, highlights the role of the hyperbaric chamber at COSTAMED - the Diver’s Alert Network preferred provider - and stresses the importance of following a conservative diving profile and having an Emergency Action Plan (EAP).

What Is Decompression Illness and Why It Matters

Decompression illness occurs when dissolved gases, mainly nitrogen, form bubbles in the bloodstream and tissues during or after a dive. This happens if a diver ascends too quickly or exceeds safe dive limits. The bubbles can cause joint pain, dizziness, paralysis, or even death if untreated. Symptoms may appear immediately or several hours after surfacing.

Cozumel’s deep walls and popular dive sites tempt divers to push limits. That makes understanding decompression illness critical since the chances are lessened with conservative dive planning and safety measures.

Decompression Illness Syndromes and Clinical Manifestations

Decompression Sickness

Collapse or unconsciousness
Coughing spasms or shortness of breath
Dizziness
Itching
Joint aches or pain
Loss of bowel or bladder function
Mottling or marbling of skin
Numbness or tingling
Paralysis
Personality changes
Staggering, loss of coordination, or tremors
Unusual fatigue
Weakness

CDC Yellow Book: Health Information for International Travel

Edition: 2026 - Authors: James Chimiak and Daniel A. Nord

The Role of the Hyperbaric Chamber at COSTAMED

If decompression illness occurs, immediate treatment is essential. The hyperbaric chamber at COSTAMED Hospital in Cozumel provides recompression therapy, the most effective treatment. This chamber increases pressure around the diver, helping nitrogen bubbles shrink and dissolve back into the blood safely. Divers and dive operators in Cozumel rely on this facility for emergency treatment, making it a critical part of the local diving safety network.

https://www.youtube.com/watch?v=JPXfAz3XeY8

Following a Conservative Diving Profile

The best way to reduce the risk of decompression illness is to dive conservatively. This means:

Limiting depth and bottom time according to dive tables or dive computer recommendations.
Ascending more slowly, at a rate no faster than 30 feet / 9 meters per minute.
Including safety stops of 3 to 5 minutes at around 15 feet / 5 meters depth.
Avoiding repetitive deep dives without adequate surface intervals.
Staying well-hydrated and rested before diving.

The Importance of an Emergency Assistance Plan (EAP)

Even with careful planning, accidents can happen. Every diver and dive operator should have an emergency action plan (EAP) tailored to Cozumel’s environment. An effective EAP includes:

Clear communication protocols to alert emergency services and the hyperbaric chamber quickly.
Access to emergency contact numbers, including COSTAMED Hospital and DAN.
Training for dive crew and guides on recognizing decompression illness symptoms.
Emergency equipment on board to administer oxygen and treat injuries.
Transport arrangements for rapid transfer to the recompression chamber.
Pre-dive briefings that inform divers about risks and emergency procedures.

Having an EAP ensures that if decompression illness occurs, the response is swift and organized, improving the chances of a full recovery. Create an Emergency Action Plan (EAP)

Practical Emergency Tips for Visiting Cozumel

Ask your tour operator about their EAP and confirm they have a plan for emergencies.
Determine where the emergency first aid and O2 kits are stored.
Know the location of COSTAMED Hospital and the hyperbaric chamber before diving, freediving, mermaiding, snorkeling, or swimming.
- Address: Calle 1 Sur #101, Colonia Adolfo López Mateos, C.P. 77640, Cozumel, Quintana Roo, Mexico , located between the 50th and 50th Bis Avenues
- Call Center para México:+52 987 872 9400
- Toll Free Number: 855 301 4111
- Services Offered
Carry DAN or another insurance that covers diving and water sports accidents.
- DAN Emergency Hotline +1 919 684 9111
Avoid alcohol, hot tubs, and strenuous activity before and after diving.
Monitor your health closely after diving and seek medical help immediately if symptoms appear.
Extend your "No Fly" time after diving.
General Emergencies for fire, police, EMS - dial 911.
The Center for Tourist Assistance and Protection (CAPTA) - assistance in consular affairs, emergency situations, and natural disasters - +52 987 869 8458

Family members and dive boat crews play a vital role in safety. They should be aware of decompression illness signs and support divers in following safe practices.

Staying Safe While Enjoying Cozumel’s Underwater World

Cozumel offers unforgettable diving experiences, but safety must come first. Understanding decompression illness, respecting dive limits, and having a solid emergency plan are key to protecting yourself and others. The hyperbaric chamber at COSTAMED Hospital stands ready to treat emergencies, but prevention is always better.

Plan your dives conservatively, know your emergency contacts, and dive with operators who prioritize safety. That way, you can enjoy Cozumel’s reefs with confidence and peace of mind.