Co-morbidity occurs when a person has more than one disease or condition at the same time. Conditions described as co-morbidities are often chronic or long-term conditions.
Co-morbidity is associated with worse health outcomes and more complex clinical management.
Carbon monoxide poisoning can have a range of co-morbidities and complications, both acute and long-term, that result from exposure.
Carbon monoxide is dangerous because it binds to haemoglobin in red blood cells more tightly than oxygen does, reducing the body's ability to transport oxygen to vital organs and tissues.
Understanding Co-morbidities
Co-morbidities for CO
There are some common co-morbidities and complications associated with carbon monoxide poisoning.
Hypoxia
The primary consequence of carbon monoxide poisoning is hypoxia, which occurs when the body doesn't receive enough oxygen. This can lead to tissue and organ damage, particularly affecting the brain and heart.
A project, awarded in 2023, being carried out by the team at Sheffield Hallam University is looking primarily at the effect of carbon monoxide exposure on the brain, but also other organs.
Read more about this project here.
Neurological complications
Carbon monoxide poisoning can result in a range of neurological symptoms, including confusion, memory problems, difficulty concentrating, headaches, dizziness, and even loss of consciousness. In severe cases, it can lead to seizures, coma, and permanent brain damage.
The CO Research Trust has funded several research projects looking at neurology and the effects of carbon monoxide. Read more about the various projects here.
There have been numerous studies focusing on the impacts of acute, high levels of CO on human populations. This type of exposure often results in serious injury or death.
Despite this, our knowledge of the impact of low-level CO on humans, particularly from a cognitive perspective, remains largely unexplored.
In this blog PhD student Lucie Wilson explores the impact of low-level carbon monoxide on cognition and brain activation.
Cardiovascular issues
The decreased oxygen-carrying capacity of the blood can strain the heart and lead to chest pain, arrhythmias (irregular heart rhythms), and in severe cases, cardiac arrest.
Respiratory problems
While not a direct result of carbon monoxide poisoning, individuals exposed to high levels of carbon monoxide may experience respiratory distress.
Tissue damage
Prolonged exposure to carbon monoxide can damage various tissues in the body, including muscles and the lining of blood vessels.
Psychological effects
Carbon monoxide poisoning survivors may experience psychological symptoms such as anxiety, depression, and post-traumatic stress disorder (PTSD) due to the traumatic nature of the event and the neurological damage caused by carbon monoxide exposure.
Dr Julie Connolly of Liverpool University has undertaken research into carbon monoxide poisoning survivors, and looking at how they can best be supported.
Below Dr Connolly talks about her project titled "Making sense of Carbon Monoxide Exposure: the lived experience of underserved communities".
More information can be found about Dr Connolly's research here.
Long-term complications
In some cases, individuals who have suffered from carbon monoxide poisoning may experience chronic health problems, including persistent cognitive deficits, mood disorders, and neurological disorders.
Treatment for CO exposure
The extent and severity of co-morbidities and complications can vary depending on factors like the duration and concentration of carbon monoxide exposure, individual health, and the timeliness of treatment.
If you suspect carbon monoxide poisoning it's crucial to seek immediate medical attention.
Treatment involves oxygen therapy to remove carbon monoxide from the bloodstream and support the body's oxygen needs.
Early intervention is critical in preventing severe and long-lasting complications associated with carbon monoxide poisoning.
If you suspect you might have CO poisoning, please visit the NHS website immediately - Here.