Increased Pain Sensitivity in Accident-related Chronic Pain Patients With Comorbid Posttraumatic Stress

This study aimed to investigate antinociceptive and pronociceptive pain mechanisms, pain intensity, and psychological distress (depression, anxiety, pain catastrophizing, and fear of movement) in patients with accident-related chronic spinal pain with (N=44) and without (N=64) comorbid PTSD characteristics. Materials and Methods: Cuff algometry was performed on lower legs to assess pressure pain threshold (cPPT), tolerance (cPTT), temporal summation of pain (increase in pain scores to 10 repeated stimulations), and conditioning pain modulation (increase in cPPT during cuff pain conditioning on the contralateral leg). Warmth detection threshold and heat pain threshold at the hand were also assessed. Clinical pain intensity (numerical rating scale), psychological distress, and PTSD symptomatology (ICD-11) were assessed with questionnaires. Mediation analyses were performed to investigate possible psychological mediators in the associations between PTSD and pain (intensity and mechanisms). Results: Patients with PTSD demonstrated increased pain intensity, and psychological distress as well as reduced warmth detection threshold and cPTT compared with patients without PTSD (P
Source: The Clinical Journal of Pain - Category: Anesthesiology Tags: Original Articles Source Type: research