Effect of Esketamine Combined with Oxycodone in Postoperative Pain Management in Elderly Patients Undergoing Abdominal Surgery: A Double-Blind Randomized Trial
In a double-blind randomized trial involving 180 elderly patients undergoing abdominal surgery, combining esketamine with oxycodone for postoperative pain management significantly reduced the incidence of moderate-to-severe pain and improved sleep quality compared to oxycodone alone, without increasing adverse events.
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 a major operation inside the belly, the body often reacts with a deep, throbbing ache that can last for days. For older adults, managing this pain is a delicate balancing act. Doctors need to stop the suffering to help patients breathe, move, and recover, but the medicines usually used to do this—strong painkillers known as opioids—can make elderly patients feel groggy, nauseous, or confused. These side effects can slow down healing and even lead to dangerous complications. The medical community has long searched for a way to get the best pain relief with the fewest side effects, often by mixing different types of drugs so that each one helps a little, rather than relying on a single heavy dose. One promising approach involves combining a standard painkiller with a drug that changes how the brain processes pain signals, aiming to calm the nervous system without putting the patient to sleep.
In a recent study conducted at a hospital in Tianjin, China, researchers tested a specific combination of medicines for older patients recovering from major abdominal surgery. The team focused on two drugs: oxycodone, a well-known painkiller that works on the body's natural pain receptors, and esketamine, a substance that blocks specific chemical signals in the brain that amplify pain. The goal was to see if adding a small amount of esketamine to the oxycodone would make the pain relief stronger and help patients sleep better, without causing new problems. The study involved 180 patients aged between 65 and 80 who were scheduled for operations lasting more than two hours. All participants received a standard nerve block to numb the abdominal wall before the surgery began, and then, after the operation, they were given a machine that allowed them to press a button to receive more pain medicine if they needed it.
The researchers split the patients into two groups. One group received only oxycodone in their pain machine, while the other group received a mixture of oxycodone and esketamine. Neither the patients nor the doctors knew which group a patient was in until the study was finished, ensuring the results were fair and unbiased. The team watched closely for three days after the surgery, checking how much pain the patients felt when resting and when moving, how well they slept, and whether they needed extra medicine to control breakthrough pain. They also monitored for side effects like confusion, hallucinations, or changes in heart rate and blood pressure.
The results showed a clear advantage for the group that received the combination of drugs. Patients who got both oxycodone and esketamine were significantly less likely to experience moderate to severe pain during the first three days after surgery. Specifically, about 30 percent of the combination group had significant pain, compared to more than half of the group that received oxycodone alone. Beyond just the pain numbers, the patients in the combination group reported sleeping better during the first two nights after their operation. They also needed fewer extra doses of pain medicine to manage their discomfort. Crucially, the addition of esketamine did not cause more side effects. The rates of confusion, hallucinations, or other adverse events were the same in both groups, and no patient in the study developed serious psychiatric symptoms.
This study suggests that for older adults facing major abdominal surgery, adding esketamine to a standard oxycodone pain regimen offers a safer and more effective way to manage pain. It allows patients to feel more comfortable and rest more deeply without increasing the risk of the confusion or grogginess that often comes with high doses of traditional painkillers. While the researchers noted that some patients still experienced pain and that the findings apply specifically to this age group and type of surgery, the results provide a strong case for using this combination as part of a broader strategy to help older patients recover more smoothly. The study confirms that by carefully mixing medicines, doctors can reduce the burden of pain while protecting the patient's overall well-being.
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