Final answer:
The next step in performing an open cricothyrotomy after taking Standard Precautions and ventilating the patient with a BVM is to identify the cricothyroid membrane, make a small horizontal incision in the membrane, and insert a tube or needle to establish an airway.
Step-by-step explanation:
After taking Standard Precautions and ventilating the patient with a BVM as well as possible while preparing the equipment, the next step in performing an open cricothyrotomy is to identify the cricothyroid membrane. The cricothyroid membrane is an important landmark for the procedure, as it is the area where the incision will be made. It is located between the cricoid cartilage and the thyroid cartilage in the anterior neck.
Once the cricothyroid membrane is identified, a small horizontal incision is made in the membrane. This allows for the insertion of a tube or needle to establish an airway. The tube or needle is then connected to a ventilation device to deliver oxygen to the patient.
It is important to note that open cricothyrotomy is an invasive procedure and should only be performed by trained medical professionals in emergency situations where other methods of establishing an airway are not possible or have failed.