Social hierarchy of pain and its connection to the memory of previously suffered pain

Effect of stress on contextual pain sensitivity in the preoperative period- A proof of concept study

Background and Aims

The importance of non-noxious contextual inputs in the interplay of pain with neurophysiologic and behavioral factors is gaining recognition. Stress of impending surgery can act as a negative context, leading to a decrease in pain threshold in patients. This study was conducted to assess the influence of stress conferred by the imminent and other contextual inputs such as anxiety, socioeconomic status, prior painful experience, and the effect of gender on modulation of pain perception in patients undergoing elective surgery.

Material and Methods

In total, 120 patients aged between 18 and 60 years of either gender posted for elective gastrointestinal surgery under general anesthesia were recruited. Data were collected on preoperative anxiety level, socioeconomic status, education, and any prior painful experience. A pressure algometer was used to measure the pressure pain thresholds and pain tolerance on the day before surgery and on the morning of surgery in the preoperative suite.

Results

There was a statistically significant decrease in both pain threshold (P < 0.0001) and pain tolerance in the immediate preoperative period in comparison to the baseline readings taken the day before surgery (P = 0.048). The magnitude of change in pain scalars was greater in females (P < 0.001), those with a high anxiety score, and a history of severe painful experience in the past.

Conclusion

Preoperative surgical stress lowers the pain threshold and pain tolerance. Contextual modulation of pain by factors such as anxiety and memory of prior painful experience, especially in the female gender, could influence postoperative patient outcomes and warrants further research.

The Social Legitimacy of Pain: Protocol for a Systematic Literature Review

Introduction: Pain is a perception conditioned both by the subjective experience of the sufferer and their social context. A preliminary literature search suggests that, today, information about the social legitimacy of pain is scarce, although it is known that this phenomenon is an element that is closely linked to the type of pain and contributes to the sufferer's experience. Thus, our objective is to explore how the social legitimacy of pain is tackled in the scientific literature. Methods: This study is a protocol for a systematic literature review where six databases were reviewed: Pubmed, Web of Science, Scielo, Scopus, PsycInfo, and CINAHL, were searched for papers dealing with the social legitimacy of pain from any discipline/study design. The obtained papers will be exported to Zotero, where the duplicates will be deleted. Later, the studies of interest will be selected, first on the basis of their titles/abstracts, and, later, on the complete text. This process will be carried out in pairs. Finally, the data of interest will be extracted, analyzing their quality, to finally make a qualitative analysis of the results. Discussion: This will be the first review to systematically explore the available evidence on the social legitimacy of pain. Therefore, it will be able, not only to extend the theoretical knowledge on this phenomenon, but also to extend its visibility, which will make it possible for the social legitimacy of pain to be studied from different disciplines and fields, thus improving the way it is approached.