Postoperative Chronic Pain: Experts Urge Better Recognition

Postoperative chronic pain (POCP) is common and is expected to become increasingly prevalent. This type of pain, however, which specifically arises following surgery, independent of any infection or surgical failure, remains poorly understood. Facilities dedicated to treating it are nearly nonexistent.

At the 2024 congress of the French Society of Anesthesia and Resuscitation, anesthesiologists specializing in pain management advocated for improved management of POCP. They put themselves forward as essential interlocutors and actors in this effort. The anesthesiologists also called for better recognition of postoperative pain by patients, general practitioners, and surgeons to enable early intervention and reduce the risk for chronicity.

Underrecognized, Poorly Managed

POCP is defined as persistent pain lasting more than 3 months after surgery, unrelated to preoperative pain, and not associated with surgical complications. It can manifest in various forms, but the most typical scenario involves a patient complaining of persistent pain that developed following a surgical procedure. Normal radiological and biologic assessments rule out infectious complications. The persistence of pain long after surgery contrasts with what is often considered a successful surgical outcome by the surgeon.

“Of the 10 million patients operated on each year in France, it is estimated that about 10% will develop POCP, equating to 1.2 million patients,” explained Cyril Quémeneur, a specialist in anesthesiology and pain management at Pitié-Salpêtrière Hospital in Paris, France.

Because of the increasing number of surgical interventions in recent years, POCP has become a major concern. “Currently, there are 275 facilities dedicated to chronic pain across the country, capable of accommodating between 300,000 and 400,000 patients. Given that knee replacement surgery — the incidence of which is rising sharply — results in postoperative pain for 20%-30% of operated patients, the question of managing this type of pain will become even more pressing in the future,” said Quémeneur.

Moreover, specialized facilities for transitional pain management are not widespread in France, unlike in Canada, which has been developing them for about a decade, he noted.

France’s pain treatment centers “are overwhelmed,” said Gilles Lebuffe, a specialist in anesthesiology and pain management at Lille University Hospital in Lille, France. “Thus, the time between when the patient is operated on and when we discuss chronic pain allows the painful condition to establish itself, leading to central sensitization at the neurological level.” Once established, this pain is difficult to treat. “The later a patient arrives at a pain center, the more challenging the situation is to manage,” said Lebuffe.

Risk Factors

It is therefore crucial to identify patients at higher risk for postoperative pain during the anesthesia consultation, thus allowing for monitoring during the postoperative period. These pains can be highly debilitating because of their intensity, chronicity, and impact on quality of life.

To target these patients, it is essential to understand which surgeries and patient types constitute risk factors, as well as the characteristics of the pain experienced.

While all surgeries can lead to POCP, certain procedures are more likely to result in chronic pain. They include breast surgery with mastectomy, thoracic and spinal surgery, amputations, and knee replacement surgery. Notably, surgical repair of inguinal hernias, considered routine surgery, is emblematic of the risk for POCP. Its incidence after this procedure is 10% or more in the literature.

In addition, POCP often has neuropathic characteristics. Patients frequently describe their pain using terms like “burning” or “electric shock.” These pains are often associated with strange sensations such as tingling, prickling, itching, or numbness. “This describes neuropathic pain, which increases the risk of chronicity,” said Lebuffe.

Preoperative Opioid Use

Another warning sign for healthcare professionals is that patients with chronic pain may have factors associated with vulnerability. Women, who have a higher incidence of chronic pain syndrome, are at greater risk of developing postoperative chronic pain than men.

It has also been shown that preoperative opioid use leads to higher postoperative pain intensities for several days. This is a factor to consider, even though opioid consumption rates in France are far lower than those in the United States, where as much as 35% of patients use opioids preoperatively, said Frédéric Aubrun, head of the Anesthesia and Intensive Care Department and a pain management specialist at the Hospices Civils de Lyon in Lyon, France. Finally, significant literature indicates that psychological fragility is a risk factor for more intense acute pain and for POCP. “Patients with chronic pain frequently have depressive symptoms and anxiety,” said Lebuffe.

Involving General Practitioners

Because one responsibility of general practitioners is to identify patients with abnormal postoperative pain trajectories, the anesthesiologists at the press conference advocated for greater patient awareness and increased involvement of general practitioners in this identification process.

“If there is an expected duration of postoperative pain at varying intensities, since it all depends on the patient’s journey (the number of reoperations, history of opioid use, etc.), it is necessary to make patients aware that it is not normal to suffer long after a surgical intervention,” said Aubrun. In addition, it is important to “connect with primary care” and mobilize general practitioners to “detect patients sliding toward opioid overconsumption” and refer them to the appropriate care structure, he said.

Although dedicated facilities for this type of pain — like transitional pain clinics in Canada or Northern Europe — do not exist in France, some hospitals, like Lille University Hospital, have established “intermediate consultations targeting patients with specific pain or chronicity characteristics. In these consultations, patients are systematically reviewed 4-6 weeks after surgery by the surgeon, who has been trained to identify neuropathic pain,” said Lebuffe. When a patient with such pain is identified, he or she is referred to an intermediate consultation and seen by a fellow anesthesiologist. The advantage of this consultation is that it is linked to a chronic pain structure. Consequently, frequent exchanges occur with the pain specialists involved in this structure, thus allowing for immediate optimization of pain treatments. The goal is to halt the process of central sensitization.

“We strongly believe in this type of transitional structure, even though it requires significant human resources,” said Lebuffe. He also called for a “societal reflection” on this issue because patients with chronic pain represent a significant cost to society, in terms of medications and work stoppages. Moreover, patients who are forced to stop working see their lives disrupted.

Managing POCP

When POCP with neuropathic characteristics has been diagnosed, specific treatments and techniques for chronic pain can be prescribed earlier than they currently are. “Systemic drug treatments for neuropathic POCP rely on various therapeutic classes (opioids, antidepressants, antiepileptics), which are not without side effects for the patient,” said Violaine D’ans, an anesthesiologist and pain management specialist at Polyclinique du Parc in Caen, France. Hence, the idea is to prescribe a minimal dose while providing the patient with techniques available to anesthesiologists. “We have a good range of management options that we use in perioperative pain management, and we have a role to play in radio- or CT-guided perinerve infiltrations, with continuous peripheral nerve blocks and possibly later with electrostimulation to help restore movement and avoid kinesiophobia.”

This story was translated from the Medscape French edition using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.