ERAS stands for Enhanced Recovery After Surgery, a set of evidence-based steps designed to help you recover faster, leave the hospital sooner, and experience fewer complications. Rather than following old surgical traditions like long fasting periods and days of bed rest, ERAS protocols coordinate your care across every phase of surgery, from weeks before your procedure through your return home. The approach has been adopted across dozens of surgical specialties and consistently leads to shorter hospital stays, lower complication rates, and less need for opioid painkillers.
How ERAS Differs From Traditional Surgical Care
Traditional surgical care developed many of its habits decades ago, often based on convention rather than evidence. Patients were told to stop eating and drinking after midnight the night before surgery, received large volumes of IV fluids during the operation, and were kept in bed for days afterward. Pain was managed almost exclusively with opioids, which slowed gut function, caused nausea, and extended recovery.
ERAS flips that approach. Every recommendation is backed by clinical evidence and coordinated by a multidisciplinary team: surgeons, anesthesiologists, nurses, dietitians, and physical therapists all follow the same playbook. The goal is to reduce your body’s stress response to surgery, keep your organs functioning as normally as possible, and get you back to eating, walking, and going home as quickly as it’s safe to do so.
Before Surgery: Preparation Starts Early
One of the biggest shifts in ERAS is what happens before you ever reach the operating room. You’ll typically receive detailed education about your procedure, what to expect during recovery, and what your role will be. This isn’t just a courtesy. Patients who understand the plan tend to recover faster and report less anxiety.
You may also be asked to improve your nutrition and physical fitness in the weeks leading up to surgery. This is sometimes called “prehabilitation,” and it can be as simple as daily walks and eating more protein. If you smoke, you’ll be strongly encouraged to stop, since smoking impairs wound healing and raises infection risk.
The fasting rules under ERAS are far more relaxed than the old “nothing after midnight” rule. At MD Anderson Cancer Center, for example, patients drink a carbohydrate-rich beverage the night before surgery (about 100 grams of carbohydrates, roughly equivalent to 32 ounces of apple juice) and another smaller dose two hours before arriving for surgery (about 50 grams). This keeps your metabolism active, reduces insulin resistance caused by surgical stress, and helps you feel less hungry and anxious going into the procedure.
During Surgery: Precise Fluid and Temperature Control
During the operation itself, your anesthesia and surgical teams follow protocols designed to keep your body in balance. One major element is how fluids are managed. The old method estimated your fluid needs based on how long you’d been fasting and gave fluids somewhat generically. ERAS uses a more targeted approach, sometimes called goal-directed fluid therapy, where clinicians monitor real-time measures of how your heart and circulation are responding. The aim is to give you exactly the right amount of fluid: enough to keep tissues well-oxygenated without overloading your system, which can cause swelling and slow recovery.
Keeping your body temperature normal throughout surgery is another priority. Even a small drop in core temperature increases the risk of wound infections and bleeding. ERAS protocols also focus on maintaining stable blood sugar levels and avoiding medications that can stress the kidneys.
Pain Control With Fewer Opioids
ERAS protocols use what’s called multimodal analgesia, which simply means attacking pain from multiple angles instead of relying on one drug. The foundation is typically around-the-clock doses of acetaminophen and ibuprofen, started before or during surgery and continued afterward. On top of that, your team may use nerve blocks (injections that numb specific areas) or epidural anesthesia to control pain at its source.
Opioids aren’t eliminated entirely. They’re available when needed, but they’re no longer the default. This matters because opioids slow down the digestive system, cause nausea and constipation, increase the risk of delirium (especially in older adults), and carry addiction risk. By minimizing opioid use, ERAS protocols help your gut wake up faster after surgery, which means you can eat sooner and go home sooner.
After Surgery: Moving and Eating Right Away
This is the phase that surprises most patients. Under ERAS, the goal is to get you out of bed within one to two hours after surgery ends. That doesn’t mean running laps. It typically means sitting upright in a chair with assistance, and staying there for as much of your recovery room time as possible, with brief returns to bed limited to about 30 minutes at a time. From there, you’ll gradually progress to standing and walking.
Early movement prevents blood clots, keeps your lungs clear, reduces muscle loss, and stimulates your digestive system. It also has a psychological benefit: patients who are up and moving feel more like themselves and less like they’re sick.
You’ll also be encouraged to start eating and drinking on the day of surgery rather than waiting for specific signs like bowel sounds or passing gas, which traditional care used as gatekeepers. Getting nutrition in early helps your body heal and reduces the risk of infection.
What the Results Show
ERAS protocols consistently deliver measurable improvements. Patients experience shorter hospital stays, fewer complications, and higher satisfaction scores. In one tracking program for colon surgery, surgical site infection rates dropped from 6% to 2% over the course of a year after ERAS was implemented, and the overall infection ratio fell by roughly two-thirds.
The benefits extend beyond infection. Patients on ERAS pathways tend to regain bowel function faster, need fewer painkillers, and are less likely to be readmitted to the hospital after discharge. For hospitals, the reduced length of stay and fewer complications also translate to significant cost savings, but the primary driver is better outcomes for patients.
ERAS Across Different Surgeries
ERAS began in colorectal surgery in the late 1990s and has since expanded to cover nearly every surgical specialty: orthopedic joint replacements, gynecologic procedures, lung surgery, urologic operations, and even cardiac surgery. Each specialty adapts the core principles to its own needs.
Cardiac surgery provides a good example of how ERAS continues to evolve. A 2024 consensus statement from the ERAS Society and the Society of Thoracic Surgeons recommended moving away from one-size-fits-all blood pressure targets during heart surgery. Instead, teams should set individualized goals based on each patient’s baseline blood pressure and real-time measures of how well the brain and organs are being supplied with blood. The same guidelines emphasized tracking patient-reported outcomes, not just clinical metrics, as a way to measure success.
What You Can Do as a Patient
If your surgical team uses an ERAS pathway, your active participation makes a real difference. Before surgery, follow the nutrition and exercise recommendations you’re given, even if they seem minor. Drink the carbohydrate beverages at the times specified. After surgery, push yourself to sit up and walk when your care team encourages it, even when it’s uncomfortable. Eat when food is offered rather than waiting until you feel hungry.
If your hospital doesn’t mention ERAS, it’s worth asking whether an enhanced recovery pathway is available for your procedure. Not every hospital has adopted these protocols, but the number continues to grow as the evidence base expands. The core idea is simple: the less your body is disrupted by the experience of surgery, the faster and more completely you recover.