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Haemodynamic changes in early phase reflex sympathetic dystrophy
H Matsumura1, Y Jimbo, K Watanabe
1Department of Plastic and Reconstructive Surgery, Tokyo Medical College, Japan.
Summary
Early reflex sympathetic dystrophy (RSD) involves bone changes and apparent normal skin blood flow despite swelling. Arteriovenous shunting in affected limbs may cause peripheral ischemia, contributing to RSD symptoms.
Area of Science:
- Medical imaging
- Vascular biology
- Pain management
Background:
- Reflex sympathetic dystrophy (RSD) is a complex pain condition.
- Early-phase RSD can present with subtle vascular and bone changes.
Purpose of the Study:
- To investigate the vascular and bone characteristics of early-phase reflex sympathetic dystrophy (RSD).
- To explore the relationship between pain, vascular changes, and tissue ischemia in RSD.
Main Methods:
- Thermography and laser speckle imaging to assess skin surface temperature and blood flow.
- Digital subtraction angiography to visualize arteriovenous shunting and vessel density.
- Analysis of osteoporotic changes in affected limbs.
Main Results:
- Patients with early RSD showed osteoporotic changes in affected limb bones.
- Thermography indicated higher temperatures, but laser speckle imaging revealed no increased skin blood flow.
- Digital subtraction angiography identified arteriovenous shunting or increased vessel density.
Conclusions:
- Persistent vascular contraction due to pain in RSD may lead to arteriovenous shunts.
- These shunts could result in peripheral subcutaneous tissue ischemia, manifesting as pain and swelling.
- Understanding these mechanisms is crucial for managing early-phase RSD.