Extravasation of Intraarticular Fluid Injection Following Canine Elbow Arthroscopy: A Cadaveric Study
🔍 Key Findings
- Elbow arthroscopy significantly increased periarticular extravasation of injected contrast compared with simple arthrocentesis (mean volume 11,663 mm³ vs 6,548 mm³; p < 0.0001).
- Contrast intensity was significantly lower after arthroscopy (739 HU vs 2,069 HU), indicating dilution and leakage into surrounding tissues.
- Extravasation occurred immediately after injection, with no significant changes in volume or intensity during the 15-minute observation period.
- Average difference in contrast volume was ~5,115 mm³ greater after arthroscopy, supporting portal-related fluid leakage.
- Diffuse periarticular spread of contrast was observed on CT in arthroscopy joints, whereas arthrocentesis controls maintained well-contained intraarticular contrast.
- Cadaveric CT imaging with 3D segmentation effectively quantified intra- and extracapsular contrast distribution.
- Dilutional effects (≈64% reduction in intensity) suggest both irrigation fluid residue and tissue diffusion contribute to extravasation.
- Clinical implication: intraarticular therapeutics (e.g., orthobiologics) may achieve higher effective concentrations if injected later rather than immediately after arthroscopy.
Simini Surgery Review Podcast
🔍 Key Findings
- Elbow arthroscopy significantly increased periarticular extravasation of injected contrast compared with simple arthrocentesis (mean volume 11,663 mm³ vs 6,548 mm³; p < 0.0001).
- Contrast intensity was significantly lower after arthroscopy (739 HU vs 2,069 HU), indicating dilution and leakage into surrounding tissues.
- Extravasation occurred immediately after injection, with no significant changes in volume or intensity during the 15-minute observation period.
- Average difference in contrast volume was ~5,115 mm³ greater after arthroscopy, supporting portal-related fluid leakage.
- Diffuse periarticular spread of contrast was observed on CT in arthroscopy joints, whereas arthrocentesis controls maintained well-contained intraarticular contrast.
- Cadaveric CT imaging with 3D segmentation effectively quantified intra- and extracapsular contrast distribution.
- Dilutional effects (≈64% reduction in intensity) suggest both irrigation fluid residue and tissue diffusion contribute to extravasation.
- Clinical implication: intraarticular therapeutics (e.g., orthobiologics) may achieve higher effective concentrations if injected later rather than immediately after arthroscopy.
Simini Surgery Review Podcast
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