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The goal of this interventional study is to explore the use of InfraRed (FLIR) imaging in determining pain intensity and severity in newly diagnosed complex regional pain syndrome patients. The main questions it aims to answer are:
Question 1: Can Infrared (FLIR) imaging be used to determine the severity of CRPS in newly diagnosed patients? Question 2: Is there any correlation with the quantification of 'the Δ thermal index value' measured by FLIR imaging with pain intensity (NRS) in newly diagnosed patients? Question 3: Is there any correlation between the quantification of 'the Δheat index value' measured by FLIR imaging between the two extremities with the severity (the severity score for CRPS) in newly diagnosed patients? Participants will have a picture of their foot taken using the forward looking infrared (FLIR) camera and answer questionnaires regarding their pain and complex regional pain syndrome (CRPS).
Patients with CRPS have a better chance of remission if they receive treatment early in the disease's progression. Similarly, determining the severity of the disease early on is critical for planning effective treatment to prevent progression. The lack of an objective method for determining the severity and potential progression of CRPS is a major reason for postponing CRPS treatment.
The purpose of this interventional study is to investigate whether or not near-infrared (FLIR) imaging can be used to evaluate the level of pain experienced by patients who have recently been diagnosed with complex regional pain syndrome. Its primary goals are to provide responses to the following questions:
Question 1: Can Infrared (FLIR) imaging be used to determine the severity of CRPS in newly diagnosed patients? Question 2: Is there any correlation with the quantification of 'the Δ thermal index value' measured by FLIR imaging with pain intensity (NRS) in newly diagnosed patients? Question 3: Is there any correlation between the quantification of 'the Δheat index value' measured by FLIR imaging between the two extremities with the severity (the severity score for CRPS) in newly diagnosed patients? The forward looking infrared (FLIR) camera will be used to take a picture of each participant's foot, and they will also be asked to fill out questionnaires regarding their level of pain and complex regional pain syndrome (CRPS).
If infrared (FLIR) imaging can be used to determine the severity of CRPS in newly diagnosed patients, and if there is a correlation between the quantification of the heat index value' measured by FLIR imaging and the severity score for CRPS in newly diagnosed patients, the findings of this study could be useful in daily clinical practice.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Infrared CRPS Group | This group includes people who have recently been diagnosed with CRPS type 1. Participants in the Infrared group will have their feet photographed using a:
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Infrared Imaging | Other | This study will use thermal forward looking infrared (FLIR) imaging to assess the severity of Complex Regional Pain Syndrome in newly diagnosed patients. |
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| Measure | Description | Time Frame |
|---|---|---|
| Complex regional pain syndrome Severity Score (CSS) | The CRPS Severity Score (CSS) is a validated continuous score to measure CRPS severity. It conforms to the Budapest CRPS criteria and tracks symptoms over time. It includes 17 signs and symptoms (8 reported by the patient and 9 observed on the day of the examination). The CSS score (range 0-17) is calculated by adding reported and observed symptoms, with a higher score (17) indicating a greater number of symptoms. | At pre-surgical screening |
| Measure | Description | Time Frame |
|---|---|---|
| Numerical Rating Scale (NRS) | The numeric rating scale (NRS) is a pain screening tool that uses a 0-10 scale to assess pain severity at that time, with zero meaning "no pain" and 10 meaning "the worst pain imaginable." | At pre-surgical screening |
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Inclusion Criteria:
Exclusion Criteria:
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Patients being treated at the Hospital for Special Surgery for CRPS in a unilateral limb.
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| Name | Affiliation | Role |
|---|---|---|
| Semih Gungor, MD | Hospital for Special Surgery, New York | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Hospital for Special Surgery | New York | New York | 10021 | United States |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 12020526 | Result | Baron R, Schattschneider J, Binder A, Siebrecht D, Wasner G. Relation between sympathetic vasoconstrictor activity and pain and hyperalgesia in complex regional pain syndromes: a case-control study. Lancet. 2002 May 11;359(9318):1655-60. doi: 10.1016/S0140-6736(02)08589-6. | |
| 8969877 | Result | Bruehl S, Lubenow TR, Nath H, Ivankovich O. Validation of thermography in the diagnosis of reflex sympathetic dystrophy. Clin J Pain. 1996 Dec;12(4):316-25. doi: 10.1097/00002508-199612000-00011. |
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IPD will not be shared with researchers.
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| Type | Date | Date Unknown |
|---|---|---|
| Release | May 21, 2026 | |
| Reset | Jun 17, 2026 |
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| Type | Includes Protocol | Includes SAP | Includes ICF | Document Label | Document Date | Document Uploaded Date | Document File Name |
|---|---|---|---|---|---|---|---|
| Prot_SAP | Yes | Yes | No | Study Protocol and Statistical Analysis Plan | Feb 16, 2023 | May 5, 2023 | Prot_SAP_000.pdf |
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| Release Date | Unrelease Date | Unrelease Date Unknown | Reset Date | MCP Release Number |
|---|---|---|---|---|
| May 21, 2026 | Jun 17, 2026 | |||
| Jun 25, 2026 |
| ID | Term |
|---|---|
| D020918 | Complex Regional Pain Syndromes |
| ID | Term |
|---|---|
| D001342 | Autonomic Nervous System Diseases |
| D009422 | Nervous System Diseases |
| D010523 | Peripheral Nervous System Diseases |
| D009468 | Neuromuscular Diseases |
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| 25317283 | Result | Jeon SG, Choi EJ, Lee PB, Lee YJ, Kim MS, Seo JH, Nahm FS. Do severity score and skin temperature asymmetry correlate with the subjective pain score in the patients with complex regional pain syndrome? Korean J Pain. 2014 Oct;27(4):339-44. doi: 10.3344/kjp.2014.27.4.339. Epub 2014 Oct 1. |
| 20965657 | Result | Harden NR, Bruehl S, Perez RSGM, Birklein F, Marinus J, Maihofner C, Lubenow T, Buvanendran A, Mackey S, Graciosa J, Mogilevski M, Ramsden C, Schlereth T, Chont M, Vatine JJ. Development of a severity score for CRPS. Pain. 2010 Dec;151(3):870-876. doi: 10.1016/j.pain.2010.09.031. Epub 2010 Oct 20. |
| 18723287 | Result | Krumova EK, Frettloh J, Klauenberg S, Richter H, Wasner G, Maier C. Long-term skin temperature measurements - a practical diagnostic tool in complex regional pain syndrome. Pain. 2008 Nov 15;140(1):8-22. doi: 10.1016/j.pain.2008.07.003. Epub 2008 Aug 23. |
| 12098613 | Result | Wasner G, Schattschneider J, Baron R. Skin temperature side differences--a diagnostic tool for CRPS? Pain. 2002 Jul;98(1-2):19-26. doi: 10.1016/s0304-3959(01)00470-5. |