Potential living donors often ask about probable recovery time, and receive a wide variety of answers. This article (about all types of surgery) offers some insight about the mystery of why some patients recover faster than others.
"Blood offers clues on speed of surgery recovery"
WASHINGTON (AP) --- One of the big frustrations of surgery: There's little way to know if a patient will be a fast or slow healer, someone who feels back to normal in a week or is out of work for a month with lingering pain and fatigue.
Now Stanford University researchers have discovered that right after surgery, patients' blood harbors clues about how fast they will bounce back -- and it has to do with the activity of certain immune cells that play a key role in healing.
The work one day may lead to a test to predict who'll need more care, or maybe even if an operation is the best choice.
"We could ask, 'Are you fit for surgery?'" said Martin Angst, a Stanford professor of anesthesiology and perioperative medicine, who helped lead the research published on Sept. 24.
U.S. doctors perform millions of operations each year, many of them minor but others much more complex. Speed of recovery depends in part on the type of surgery and how sick the person is. Some hospitals have begun implementing "enhanced recovery" strategies, specific steps to take right before and after certain major operations in hopes of at least speeding the patient's discharge from the hospital, if not their overall recuperation time.
But scientists don't know what biology explains why some people recover so much faster than someone else who's equally sick, information that could help guide development of those enhanced-recovery programs.
"I'm very excited that the science around surgery recovery is going that direction," said Julie Thacker, a colorectal surgeon at Duke University who wasn't involved in the new study but praised the work.
Thacker has helped implement an enhanced-recovery program at Duke that she said works well, but said she can't explain which steps are most important or why without research into how they affect such things as the body's inflammatory response.
The Stanford team took an usually close look at 32 otherwise fairly healthy people who underwent a first-time hip replacement. They took blood samples from the patients before surgery and at several points afterward, and questioned them about pain, fatigue and other elements of recovery every few days for 6 weeks.
That recovery was quite varied: Some experienced only mild pain just 2 days after surgery, while others didn't report their pain was mostly gone until 36 days later. The median time to recuperate from post-surgical fatigue, extreme tiredness after simple activity, was 3 weeks, meaning half of patients fared better and half took longer.
To learn why, the researchers looked to immune cells that are behind the inflammation that always occurs with a wound. To find and map the activity of key players, they turned to the lab of Stanford immunology professor Garry Nolan, who helped develop a technology that measures dozens of features of individual immune cells simultaneously.
The discovery: Patients' blood shows an immune signature of recovery that accounts for much of the variability in recovery time -- a pattern of activity in certain immune cells that are first responders to the injury site, the researchers reported in Sept. in the journal Science Translational Medicine.
If that particular reaction is controlled in the first 24 hours after surgery, patients recover faster. But when that reaction increases instead, patients recover more slowly, Angst said.
"We were surprised," that such an early reaction set the stage for recovery, he said.
But it makes sense, he added: Inflammatory processes initiate healing but "you have to keep them on a leash and dwindle down efforts," because too much inflammation harms.
Topic: Recovery time (Read 2485 times)