1. Stomach Inflation
2. CPR Technique
3. Cardiac Arrest Resuscitation
4. Out-of-Hospital Emergency
5. CPR Complications

In a compelling study published in the journal ‘Resuscitation,’ scientists have examined an aspect of cardiopulmonary resuscitation (CPR) that is often overlooked but can have critical consequences on the outcome of the procedure – stomach inflation. This new research focuses on the implications of air inadvertently entering the stomach during CPR performed on out-of-hospital cardiac arrest patients, analyzing where the air goes and the possible consequences of this frequent yet less-understood occurrence.

The study titled “Stomach inflation during cardiopulmonary resuscitation in out-of-hospital cardiac arrest patients: Where did the air go?” authored by Nicolas Cazes, Camille Martinet, and François Topin from the Emergency Department of Laveran Army Teaching Hospital in France, emphasizes that stomach inflation can lead to significant adverse effects including increased pressure, aspiration, and even decreased efficiency of chest compressions. Published with a DOI 10.1016/j.resuscitation.2023.110079, this research focuses on a critical detail that could impact the success of life-saving maneuvers.

The Issue of Stomach Insufflation During CPR

Cardiac arrest happens when the heart stops beating suddenly, and it is a medical emergency that requires immediate resuscitation efforts. CPR is one of the most widely recognized emergency procedures, designed to simulate heart pumping and preserve brain function until further medical treatment can restore a normal heart rhythm.

Conventional CPR involves chest compressions and rescue breaths. However, when rescue breaths are not provided correctly, there is a risk that air may enter the patient’s stomach rather than their lungs. This complication, known as stomach insufflation or inflation, has not been extensively studied in real-life scenarios, particularly in out-of-hospital settings where conditions are less controlled than within medical facilities.

Study Details and Findings

Nicolas Cazes and his colleagues delved into the occurrences and consequences of stomach inflation during pre-hospital CPR. By utilizing detailed case studies and data analysis, the researchers concluded that stomach inflation not only compromises the resuscitation process but also poses additional risks to the patient. The Department of Laveran Army Teaching Hospital’s Emergency team also concluded that proper CPR technique is essential to avoid stomach inflation, promoting better outcomes for cardiac arrest victims.

The study acknowledges the challenges faced by first responders in emergency out-of-hospital conditions where stress and unpredictable circumstances can impact the delivery of CPR. However, the findings point towards the urgent need for training and raising awareness among both professional health workers and the public regarding the correct techniques of CPR.

Implications of the Study

The research has several implications for both clinical practice and public health policy:

1. Enhanced Training: Effective CPR training must emphasize proper technique to avoid stomach inflation. This involves correct hand positioning, compression depth and rate, and the right way to deliver rescue breaths.

2. Public Awareness: Public CPR awareness campaigns must stress the importance of avoiding stomach inflation and describe the correct methods to minimize this risk.

3. CPR Guidelines Update: Current CPR guidelines might benefit from a review and update in light of this study’s findings. These adjustments may involve clearer instructions on preventing stomach inflation.

4. Advanced CPR Equipment: Development and distribution of advanced CPR equipment could support more precise ventilation, reducing the risk of stomach inflation.

5. Research Opportunities: The study opens avenues for further research into technological innovations and alternate CPR methods to prevent stomach inflation.

Declaration of competing interest: The authors have declared that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.


1. Cazes, N., Martinet, C., & Topin, F. (2024). Stomach inflation during cardiopulmonary resuscitation in out-of-hospital cardiac arrest patients: Where did the air go? Resuscitation, 194, 110079.

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3. Sayre, M. R., Koster, R. W., Botha, M., Cave, D. M., Cudnik, M. T., Handley, A. J., … & Hazinski, M. F. (2010). Part 5: adult basic life support: 2010 International Consensus on Cardiopulmonary Resuscitation and Emergency Cardiovascular Care Science with Treatment Recommendations. Circulation, 122(16_suppl_2), S298-S324.

4. Aufderheide, T. P., & Lurie, K. G. (2004). Death by hyperventilation: A common and life-threatening problem during cardiopulmonary resuscitation. Critical Care Medicine, 32(9 Suppl), S345-S351.

5. Paal, P., Pircher, I., Baur, T., Gruber, E., Strasak, A. M., & Herff, H. (2011). Incidence of emesis associated with gastric inflation during cardiopulmonary resuscitation without use of cricoid pressure. Prehospital Emergency Care, 15(2), 250-257.


The research by Cazes, Martinet, and Topin illuminates a critical aspect of out-of-hospital cardiac arrest situations that requires immediate action. Training on proper CPR techniques to avoid stomach inflation must be prioritized to ensure the best possible outcomes for cardiac arrest victims. As protocols adapt and awareness spreads, the chances of survival and recovery for these individuals may significantly improve. The study is a reminder of the dynamic nature of medical knowledge and the necessity of continually revising practice based on the latest empirical evidence.