What range of head-of-bed angle is recommended to facilitate finding intercostal spaces for electrode placement?

• A. 0 degrees (flat)
• B. 30 to 40 degrees
• C. 10 to 20 degrees
• D. 50 to 60 degrees

Answer: (B)

Positioning influences how easily you locate intercostal spaces for electrode placement. Elevating the head of the bed to about 30 to 40 degrees makes the chest more accessible and the spaces between the ribs easier to feel and identify, while keeping the patient comfortable and allowing stable landmarks. This angle helps prevent the shoulders and breast tissue from obscuring landmarks and reduces chest wall distortion that can occur with more upright or flatter positions. If the bed is flat, the spaces can be harder to palpate; if the angle is too high, around 50 to 60 degrees, anatomy can shift and complicate access to the correct spaces. A very small tilt, like 10 to 20 degrees, may not provide enough chest expansion for reliable landmarking. Therefore, 30 to 40 degrees is the best range.