Prediction of Acute Postoperative Pain and Analgesic Consumption

Study Overview
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Brief Summary
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Pain is an expected part of surgical recovery but effective pain management remains challenging. The high variability in postoperative pain experience and analgesic treatment response between patients is part of the challenge. Few studies have yet combined preoperative assessment of responses to experimental pain with measurements of cognitive and emotional processes in the prediction of postoperative pain. We hypothesize, that preoperative evoked brain potentials (using standard electroencephalographic brain imaging), endogenous pain inhibition capacity (conditioned pain modulation), responses to pressure/thermal pain stimulation, and/or situational pain-related catastrophic thinking are useful clinical predictors of postoperative pain and analgesic consumption.

Detailed Description
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Preselected preoperative predictor variables/individual patient characteristics include the following: Evoked brain potentials (using standard electroencephalographic brain imaging) Capacity of descending pain inhibition induced by a cold pressor test (2C in 120 sec) Pressure pain detection and tolerance thresholds in muscle (m.quadriceps) Pressure pain tolerance thresholds in bone (sternum and tibia) Heat pain tolerance threshold in skin (forearm) Responses to the Situational and Dispositional Pain Catastrophizing Scale Response to the State-Trait and Anxiety Inventory Response to the Beck's Depression Inventory

Official Title
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Prediction of Acute Postoperative Pain and Analgesic Consumption by Preoperative Responses to Experimental Pain in Patients Undergoing Chest Wall Surgery

Conditions
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Postoperative Pain

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Elective minimally invasive surgical correction of funnel chest (pectus excavatum age ≥15 years. Exclusion Criteria: Previous thoracic surgical interventions Presence of diseases affecting the central and/or peripheral nervous system Presence of chronic pain conditions Inability to speak and/or understand Danish Inability to understand and participate in the experimental pain session Presence of psychiatric disorders History of frostbite in the non-dominant upper limb Presence of sores or cuts on non-dominant upper limb Presence of cardiovascular disease History of fainting and/or seizures Presence of fractures of the non-dominant upper limb Presence of Reynaud's phenomenon. Secondary exclusions included: Insensitivity to experimental cold pressor pain Lack of epidural catheter placement Re-operation

Ages Eligible for Study
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Minimum Age: 15 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Surgery<br>Minimally invasive repair of pectus excavatum | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Postoperative pain intensity | 11-point (0-10) numerical rating scale of pain intensity | Within the first 5 days after surgery | 
| Postoperative pain unpleasantness | 11-point (0-10) numerical rating scale of pain unpleasantness | Within the first 5 days after surgery | 
| Postoperative consumption of analgesics | The use of all pain-related treatments, including rescue analgesics and any other concomitant pain treatments. | Within the first 5 days after surgery | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Funnel chest (Pectus excavatum)