Treatment of Acute Low Back Pain With Transcutaneous Electrical Neurostimulation at the Emergency Department: a Randomized Controlled Trial

"* The patient will be assigned to one of two groups:~ 1. The intervention group: called the REAL TENS group (R- TENS)~ 2. The control group: called the FAKE TENS group (F-TENS)~ Step 2: The doctor investigator 1 will place the TENS on the painful area identified by the patient, following the model proposed in appendix 1.~ Step 3: The doctor investigator 1 will explain to patients in both groups that they may feel a slight tingling sensation or no sensation at all.~ Step 4: The doctor investigator 1 will make the following settings on the TENS:~* For the interventional group (REAL TENS) a combined setting will be used:~ 1. Tens Burst (P2) at 2Hz and 180 µs with an action on muscle pain.~ 2. Tens gate control (P9) at 100 Hz and 250 µs with an action focused on nociceptive pain.~* For the control group (FAKE TENS), the doctor will not make any real adjustments.~The patient will not be able to see the settings made by the doctor investigator 1.~Stage 5: The doctor investigator"