Hi Danielle
I would advise you to be thorough with your palpation of each and every spinous process and transverse process to be absolutely certain you are needling in the gutter created by the spinous process and the transverse process therefore giving you the lamina as a bony backdrop for the needle. Use the 1:1 rule, or shorten the needle to a 15 mm (half inch) needle if you are in any doubt.
Sonya Worth