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Microvascular instability in tetraplegic patients: preliminary observations
1Spinal Cord Injury and Medical Services, Department of Veterans Affairs Medical Center, West Roxbury, and Harvard Medical School, Boston, MA, USA.
Spinal Cord
|February 18, 2004
Summary
Spinal cord injury in tetraplegic patients causes unstable cutaneous microvascular blood flow. This instability is linked to the severity of paralysis, impacting blood flow regulation.
Area of Science:
- Physiology
- Neurology
- Vascular Biology
Background:
- Spinal cord injury (SCI) can significantly impact autonomic nervous system function.
- Microvascular stability is crucial for maintaining adequate tissue perfusion and function.
- Understanding SCI's effects on microcirculation is vital for patient management.
Purpose of the Study:
- To investigate the impact of spinal cord injury on the stability of cutaneous microvascular blood flow.
- To compare microvascular instability between complete and incomplete SCI lesions.
Main Methods:
- A case-control study involving 19 tetraplegic patients.
- Photoelectric pulse sensors measured skin blood flow at the neck and fingers.
- Calculated unstable fraction of pulsatile cutaneous blood flow (UFCF) and simultaneous UFCF.
- Compared flow changes in complete versus incomplete SCI.
Main Results:
- Tetraplegic patients exhibited significant microvascular instability (UFCF).
- Complete SCI lesions showed higher UFCF (0.25+/-0.12) than incomplete lesions (0.13+/-0.9).
- Simultaneous UFCF did not significantly differ between groups.
Conclusions:
- Tetraplegic individuals display altered cutaneous microvascular blood flow regulation.
- The severity of paralysis, indicated by lesion completeness, correlates with microvascular instability.
- Findings suggest SCI disrupts normal microvascular responses.