The adequacy of a block for Caesarian section can be tested as follows:

• The block reaches the lower part of the breast nipple (T4) to cold sensation and pin prick on both sides
• A block to light touch to the level of the xiphisternum on both sides
• The patient is unable to perform a straight leg raise due to a dense motor block
• A useful confirmation of a good sensory block is a firm pinch below the umbilicus - no pain should be felt