Combined rectus sheath and quadratus lumborum blocks versus quadratus lumborum block alone for movement-evoked pain after laparoscopic gynecologic surgery: a prospective randomized open-label trial
In a prospective randomized trial of patients undergoing laparoscopic gynecologic surgery, combining rectus sheath blocks with quadratus lumborum blocks significantly reduced movement-evoked pain during the first 24 postoperative hours compared to quadratus lumborum blocks alone, without increasing adverse events or rescue opioid requirements.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
After surgery, the body often reacts with a sharp, stinging pain that flares up whenever a person tries to move. This is not just a matter of comfort; it is a major obstacle to recovery. When patients cannot sit up, stand, or walk without severe discomfort, their bodies remain under stress, and the healing process slows down. In modern medicine, the goal is to keep this movement-related pain under control so patients can get moving as soon as possible, a strategy that helps prevent complications and speeds up the return to normal life. To achieve this, doctors often use regional nerve blocks, which are injections of local anesthetic that numb specific areas of the body to stop pain signals from reaching the brain. Two such techniques have gained attention for abdominal surgeries: one targets the deep muscles of the back to cover the entire abdominal wall, while the other focuses specifically on the front muscles where surgical ports are often placed. The question facing anesthesiologists is whether combining these two approaches offers better protection against the pain of movement than using the deeper, broader technique alone.
A team of researchers in Ukraine set out to answer this question by conducting a study with fifty adult patients scheduled for elective laparoscopic gynecologic surgery. These are minimally invasive procedures where surgeons operate through small incisions, often involving the removal of the uterus or fibroids. The researchers divided the patients into two groups. One group received the standard deep nerve block alone, while the other group received that same deep block plus an additional injection targeting the front abdominal muscles. Both groups received the same general anesthesia and the same schedule of non-opioid pain medication after surgery. The only difference was the combination of nerve blocks. The team then carefully measured how much pain the patients felt when they were asked to perform a specific sequence of movements: sitting up from a lying position, standing, and walking. These measurements were taken at regular intervals over the first twenty-four hours after the operation.
The results showed a clear difference between the two groups. Patients who received the combined treatment reported significantly less pain during movement at every single time point measured. In the first hour after surgery, the average pain score for the combined group was twenty, while the group with the single block reported an average of thirty-one. This gap persisted throughout the day; at six hours, the scores were sixteen versus thirty-one, and at twenty-four hours, they were ten versus twenty. The researchers noted that these differences were not just statistically significant but also large enough to be felt by the patients as a real improvement in their comfort. Importantly, the study found that adding the second block did not cause any delays in waking up from anesthesia or increase the risk of side effects. No patient in either group required strong opioid painkillers like morphine after the surgery, suggesting that the combination of nerve blocks and standard non-opioid medication was sufficient to manage the pain.
While the study also looked at other factors, such as how deeply the patients were asleep during surgery and their blood sugar levels, the primary focus remained on the pain experienced during movement. The researchers observed that pain at rest was low for everyone, but the pain triggered by movement was the true challenge, and this is where the combined technique excelled. The study authors were careful to note that their sample size was relatively small and that the study was open-label, meaning the medical team knew which treatment each patient received, which could introduce some bias. However, the data strongly suggests that for this specific type of surgery, targeting both the deep back muscles and the front abdominal wall provides a more complete shield against the pain of movement than targeting the deep muscles alone. This finding supports the idea that a tailored, multi-layered approach to pain management can help patients recover more comfortably and quickly after minimally invasive surgery.
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