Trapezius-rhomboid plane block for myofascial pain syndrome. Description of a new intervention.

INTRODUCTION

Myofascial pain syndrome is a chronic pain condition prevalent in the general population. Muscular symptoms at the level of the trapezius and rhomboid muscles are frequent and the response to therapeutic interventions established so far is variable.

METHODS

We present a case series of six patients who underwent a new technique of interfacial trapezius-rhomboid block (TRB) performed under ultrasonographic guidance by applying 10 cubic centimeters (cc) of analgesic solution (bupivacaine 0.25 % and methylprednisolone 40 mg) in the interfacial plane between the trapezius and rhomboid muscles at the level of the fifth and sixth ribs.

RESULTS

At a follow-up of one and eight weeks, measurements of numerical rating scale (NRS) pain intensity were carried out, finding an average decrease of NRS pain intensity by 70 %.

CONCLUSION

This new technique may be considered for the treatment of myofascial pain syndrome of the trapezius and rhomboid muscles. Larger future studies are needed to better establish its safety and efficacy.