What must be done if an open chest wound is found?

In the case of an open chest wound, the priority is to prevent air from entering the pleural space, which can lead to a condition known as a tension pneumothorax. Applying the paramedic's gloved hand immediately helps to occlude the wound, effectively creating a seal and preventing further air from entering the chest cavity. This action is critical because allowing air to enter can compromise the patient's respiratory function and cardiovascular stability.

After initial occlusion with a gloved hand, further steps would typically involve applying a more secure dressing to maintain that seal and prevent air from moving in and out of the wound as the patient breathes. Therefore, the immediate occlusion with the paramedic’s hand serves as a life-saving measure that stabilizes the patient's condition until appropriate advanced care can be administered.

Other options suggest actions that do not effectively address the critical nature of an open chest wound. Leaving the wound open could exacerbate the issue by allowing more air to enter the chest cavity, and simply monitoring the patient without intervention would neglect the urgent need to secure the wound and protect the patient from further complications. Applying a tourniquet is also not appropriate in this situation, as it is meant for controlling bleeding from extremities and does not address the specific needs