Footnotes

• Twitter @kaohesham, @NarouzeMD

• Contributors BCHT: conceived, performed procedure, collected data, revised, approved and is accountable for the final manuscript. HE: performed procedure, collected data, revised, approved and is accountable for the final manuscript. LM: performed procedure, collected data, contributed, revised, approved and is accountable for the final manuscript. SK: performed procedure, collected data, contributed, revised, approved and is accountable for the final manuscript. SN: performed procedure, collected data, contributed, revised, approved and is accountable for the final manuscript. RD: performed anatomical dissection, collected data, contributed, revised, approved and is accountable for the final manuscript.

• Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

• Competing interests The author BCHT has contributed in part to the design of modified Tuohy tip for catheter over needle technique.

• Provenance and peer review Not commissioned; externally peer reviewed.