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Phlebitis and extravasation ("tissuing") with intravenous infusions
The Medical Journal of Australia
|May 26, 1984
Summary
Infusion failures due to phlebitis or extravasation stem from infusate irritation causing venoconstriction. This constricts blood flow, leading to needle site damage and fluid leakage, or worsening inflammation.
Area of Science:
- Vascular biology
- Pharmacology
- Medical device science
Background:
- Intravenous infusions are common medical procedures.
- Phlebitis and extravasation are frequent complications.
- Understanding the underlying mechanisms is crucial for patient safety.
Observation:
- Infusate irritation of the vascular endothelium is proposed as a primary cause.
- This irritation can lead to venoconstriction (vein narrowing).
Findings:
- Venoconstriction can impede infusion flow, increasing venous pressure.
- Elevated pressure may enlarge the needle/cannula insertion site, causing extravasation.
- Partial venoconstriction can lead to undiluted infusate contact with the endothelium, exacerbating irritation and causing phlebitis.
Implications:
- This mechanism highlights the importance of infusate properties and administration techniques.
- Preventive strategies should focus on minimizing endothelial irritation.
- Further research into endothelial responses to infusates is warranted.
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