Feasibility and Analgesic Outcomes of Surgically Placed Erector Spinae Plane Catheters in Chronic Pain Patients Undergoing Posterior Spinal Fusion

Surgery to fuse the spine from the back is a major undertaking that leaves the body in a state of deep distress. The muscles and tissues along the spine are cut and pulled apart to reach the bones, creating a wound that hurts intensely once the anesthesia wears off. For decades, the standard response to this pain has been powerful opioids, drugs that dull the brain's perception of suffering but also slow down recovery, cloud the mind, and carry risks of long-term dependence. In recent years, doctors have sought a different path, one that blocks pain signals before they reach the brain without the heavy side effects of narcotics. One such method involves injecting local anesthetic into a specific layer of tissue near the spine, a technique known as an erector spinae plane block. This approach aims to numb the area where the surgery happened, allowing patients to move sooner and heal faster. However, while a single injection works for a short time, the pain from a complex fusion can last for days, leading researchers to wonder if a continuous stream of medicine delivered through a tiny tube could offer better relief.

A team of researchers at George Washington University set out to test a specific variation of this idea: having the surgeon place the tube directly during the operation. Instead of waiting for a pain specialist to find the spot with a needle and ultrasound after the surgery is over, the neurosurgeon places the catheter while looking directly at the spine before closing the incision. This pilot study focused on a particularly difficult group of patients: those already living with chronic pain before their surgery. These individuals often have bodies that have adapted to constant discomfort, making them harder to treat and more likely to require high doses of pain medication. The researchers wanted to see if placing these tubes under direct vision was safe, if the tubes stayed in place, and if the patients could manage their pain well enough to get out of bed and start walking again.

The study followed fifteen patients who underwent posterior spinal fusion between 2022 and 2025. During the final stages of their operations, the surgical team threaded small catheters under the skin and into the muscle plane along the spine, securing them with dressings before the patients woke up. Once the patients were in the recovery room, a continuous flow of a numbing medication called ropivacaine was pumped through these tubes by an acute pain team. The goal was to keep the pain signals quiet while the body began its repair work. The researchers tracked how much pain the patients reported, how many opioids they still needed, and how quickly they could stand up and walk.

The results showed that the procedure was technically possible and safe. The surgeons were able to place the tubes without issue, and for the most part, the tubes stayed where they were put. In three cases, the tubes were accidentally pulled out during physical therapy, but this did not cause any harm. One patient experienced a ringing in the ears, a sign that the medication was affecting the nervous system, but this resolved quickly when the flow was slowed down. No serious infections or nerve damage occurred. Throughout the four days the tubes were in place, the patients' pain levels remained mostly in the mild to moderate range. While the pain did not disappear completely, it stayed manageable, and the patients did not report sudden, severe spikes in agony that required emergency intervention.

What the researchers found most interesting was how the patients moved despite the pain. Eighty percent of the group was able to get out of bed and walk on the first day after surgery. By the second day, nearly all of them were mobile, and by the third day, every single patient was up and moving. This early movement is a critical goal in modern recovery plans, as it prevents complications like blood clots and pneumonia. The study also noted that while the pain scores stayed relatively steady, the amount of opioid medication the patients needed did fluctuate. Some days they needed very little, while on others, particularly later in the recovery, the need for painkillers went up. This suggests that while the continuous numbing helped, the body's response to the trauma of surgery is complex, and the pain management strategy had to adapt to the patient's changing needs.

The study did not prove that this method is better than other ways of managing pain, because there was no control group to compare it against. The researchers could not say for certain that the tubes reduced the total amount of opioids needed compared to standard care, nor could they claim that the pain was significantly lower than it would have been otherwise. What they did establish was that this specific technique is feasible. It can be done safely by the surgical team, it does not seem to cause new problems, and it allows patients to participate in their own recovery quickly. For a group of patients who already struggle with chronic pain, the ability to keep pain under control enough to walk on the first day is a significant step forward.

This work serves as a foundation for future research. The authors suggest that larger studies are needed to see if this approach truly offers a long-term advantage over other methods. They propose that comparing surgeon-placed tubes to the traditional ultrasound-guided injections could reveal which method works best for different types of patients. For now, the study provides a clear proof of concept: a surgeon can place a continuous pain-relief line directly into the surgical field, and patients can tolerate it well enough to begin healing immediately. It is a practical, grounded step toward refining how we care for the most complex spine surgeries, offering a potential way to reduce reliance on heavy narcotics while helping patients regain their mobility.