This clinical trial is focused on studying the effectiveness and safety of a medication called Ropivacaine in managing pain after surgery. Specifically, it looks at patients who have undergone a type of back surgery known as lumbar arthrodesis. The study aims to compare two methods of administering the medication: one method involves injecting it near the surgical area, known as a plane block, and the other involves injecting it directly into the surgical wound, known as wound infiltration.
The purpose of the study is to see if using Ropivacaine can help reduce the need for another pain medication, morphine, after surgery. Participants in the study will receive either the Ropivacaine injection or a placebo. The study will monitor how much morphine is needed in the 48 hours following surgery. Additionally, it will assess pain levels at various times after surgery, the quality of recovery, the length of hospital stay, and any side effects from the drug.
Participants will be observed for changes in their pain levels and overall recovery during the first two days after surgery. The study will also track any adverse effects related to the use of Ropivacaine during this period. This research aims to provide insights into better pain management strategies for patients undergoing lumbar arthrodesis surgery.



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