To determine the appropriate technique for Susan to use when giving compressions to Noah, we need to consider the effectiveness and safety of each method.

Solution By Steps

Step 1: Evaluate the One-finger Technique

The one-finger technique is generally not recommended for CPR as it provides insufficient force and depth for effective chest compressions. This method is too weak to generate the necessary pressure to circulate blood adequately.

Step 2: Evaluate the Two-handed Technique

The two-handed technique, also known as the hands-only CPR, is the standard method recommended by most medical guidelines. This technique involves placing both hands on the center of the chest and pushing hard and fast. It ensures adequate depth and force for effective compressions, which is crucial for maintaining blood flow during cardiac arrest.

Final Answer

Susan should use the Two-handed technique to give compressions to Noah. This method is more effective and safer for providing the necessary pressure and depth required for CPR.