Locating The Fourth Intercostal Space - Philips IntelliVue TRx Instructions For Use Manual

Positioning ECG Electrodes
Locating the
Fourth
Intercostal
Space
6-12
ECG Monitoring
Angle of Lewis
For accurate chest electrode placement and measurement, it is important to
locate the fourth intercostal space. This can be done using the Angle of Lewis.
1. Locate the second intercostal space by first palpating the Angle of Lewis
(the bony protuberance where the body of the sternum joins the
manubrium). This rise in the sternum is where the second rib is attached,
and the space just below this is the second intercostal space.
2. Palpate and count down the chest until you locate the fourth intercostal
space.