Effects of Catheter Tip Location on the Spread of Sensory Block Caused by a Continuous Thoracic Paravertebral Block: A Prospective, Randomized, Controlled, Double-Blind Study

Figure 2

Spreading pattern of radiopaque dye injected using a thoracic paravertebral block technique. (a) The spread in the thoracic paravertebral space shown along the lateral side of the thoracic vertebrae and the intercostal spread. (b) The cloud-like spread. (c) The intercostal spread alone. The black arrows indicate the spread of the radiopaque dye.

(a)

(b)

(c)