Despite having been referenced in the literature for over a decade, the term "mixed pain" has never been formally defined. The strict binary classification of pain as being either purely neuropathic or nociceptive once left a good proportion of patients unclassified; even the recent adoption of "nociplastic pain" in the IASP Terminology leaves out patients who present clinically with a substantial overlap of nociceptive and neuropathic symptoms. For these patients, the term "mixed pain" is increasingly recognized and accepted by clinicians. Thus, an independent group of international multidisciplinary clinicians convened a series of informal discussions to consolidate knowledge and articulate all that is known (or, more accurately, thought to be known) and all that is not known about mixed pain. To inform the group's discussions, a Medline search for the Medical Subject Heading "mixed pain" was performed via PubMed. The search strategy encompassed clinical trial articles and reviews from January 1990 to the present. Clinically relevant articles were selected and reviewed. This paper summarizes the group's consensus on several key aspects of the mixed pain concept, to serve as a foundation for future attempts at generating a mechanistic and/or clinical definition of mixed pain. A definition would have important implications for the development of recommendations or guidelines for diagnosis and treatment of mixed pain.
The majority of patients who have undergone surgery experience moderate-to-severe postoperative pain. Asian patients tend to under-report pain and are consequently under-treated. Poor postoperative pain management increases the risk of morbidity, prolonged opioid use, lower quality of life outcomes and the risk of chronic post-surgical pain. Multimodal analgesia is the cornerstone of postoperative pain management. Non-steroidal anti-inflammatory drugs are considered a core component of multimodal analgesia due to their anti-inflammatory and analgesic properties. Use of a consistent non-steroidal anti-inflammatory throughout the postoperative period can help to achieve and maintain adequate pain relief. This review investigates the use of multimodal analgesia in postoperative pain management in Asia, with a focus on clinicians’ experience with dexketoprofen as a non-steroidal anti-inflammatory therapy throughout the postoperative period and its combination as fixed dose with Tramadol, a centrally acting synthetic opioid analgesic, in Asian patients, when necessary.
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