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Dehydration and venous thromboembolism after acute stroke
1Department of Elderly Care, Haematology and Chemical Pathology, Guy's and St. Thomas' Hospital Trust, London, UK. jameskelly@northbrookfm.fsnet.co.uk
QJM : Monthly Journal of the Association of Physicians
|April 22, 2004
Summary
Dehydration following acute ischemic stroke (AIS) is linked to a higher risk of venous thromboembolism (VTE). Maintaining adequate hydration is crucial for stroke patients to prevent VTE.
Area of Science:
- Biomedical research
- Clinical neurology
- Thrombosis research
Background:
- The link between dehydration and venous thromboembolism (VTE) is commonly assumed but lacks clinical evidence.
- Acute ischemic stroke (AIS) patients are at risk for VTE.
Purpose of the Study:
- To investigate the association between dehydration indicators and VTE occurrence in AIS patients.
- To quantify the risk of VTE associated with dehydration markers post-stroke.
Main Methods:
- Prospective observational study of 102 unselected AIS patients.
- Serial measurements of serum osmolality, urea, and creatinine.
- VTE screening using magnetic resonance direct thrombus imaging.
- Standard thromboprophylaxis with aspirin and compression stockings was administered.
Main Results:
- Elevated serum osmolality (>297 mOsm/kg), urea (>7.5 mmol/l), and urea:creatinine ratio (>80) were significantly associated with VTE.
- Odds ratios for VTE were 4.7 for high osmolality, 2.8 for high urea, and 3.4 for high urea:creatinine ratio.
- These associations remained significant after multivariable analysis.
Conclusions:
- Dehydration is a significant independent risk factor for VTE in patients following AIS.
- Ensuring adequate hydration is essential for VTE prevention in AIS patients.