Here are the articles – at the end is the study by Jerry Hoffman (okay so it was an abstract) that showed that buffered lidocaine was not worth much to the patient.
Talan DA et al. Trimethoprim-Sulfamethoxazole versus Placebo for Uncomplicated Skin Abscess N Engl J Med. 2016 Mar 3;374(9):823-832.
Alsaawi et al. Ultrasonography for the diagnosis of patients with clinically suspected skin and soft tissue infections: a systematic review of the literature. Eur J Emerg Med 2015
Bourne et al Injectable lidocaine provides similar analgesia compared to transdermal lidocaine/tetracaine patch for the incision & drainage of skin abscesses: A randomized, controlled trial J Emerg Med. 2014 Sep;47(3):367-71
Tornay et al Heated versus buffered lidocaine and the pain on local injection: A comparative study Annals of Emergency Medicine 1994 , Vol. 23, Issue 3, p629
Small study that showed most patients would not pay $2 for buffered lidocaine. “Heating a solution of lidocaine with epinephrine reduces the pain of local injection, but buffering with bicarbonate is more effective in this regard. The value of this difference to the patient may be minimal”