Superficial block
The superficial SAPD is performed with the needle placed as shown in Figure 3. The needle is inserted medial to the probe and directed laterally and inferiorly in the sagittal plane. The needle is placed into the fascial plane between latissimus dorsi and serratus anterior around 1-2cm below the skin. Local anaesthetic (around 40mls) is then injected to hydrodissect between the muscles. (Figure 6)
