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Intraosseous infusion using the osteoport implant in the caprine tibia
R D Welch1, M J Waldron, D A Hulse
1Department of Large Animal Medicine and Surgery, Texas A&M University, College Station.
Summary
Intraosseous infusion via the Osteoport implant in goats showed increased bone density. Continuous infusion, not high-pressure bursts, significantly altered bone formation and resorption, suggesting duration impacts bone changes.
Area of Science:
- Biomedical Engineering
- Orthopedic Research
- Animal Models
Background:
- Intraosseous infusion is a critical route for fluid and medication delivery, especially in pediatric patients.
- Assessing the safety and osseous effects of novel intraosseous devices is essential for clinical adoption.
- Understanding the impact of elevated intraosseous pressure (IOP) on bone is crucial for preventing complications.
Purpose of the Study:
- To evaluate the in vivo animal tolerance of the Osteoport pediatric implant for intraosseous infusion in immature goats.
- To investigate the osseous effects of both continuous and intermittent high-pressure intraosseous infusions.
- To determine the relationship between intraosseous pressure duration/magnitude and bone response.
Main Methods:
- Immature goats received intraosseous infusions via the Osteoport implant in the proximal tibia.
- Group 1: Continuous infusion (CI) of whole blood (5 days, IOP 30-45 mm Hg).
- Group 2: Intermittent high-pressure infusion (HPI) of lactated Ringer solution (LRS) (10 days, IOP 90-125 mm Hg, twice daily).
- Group 3: Implant patency assessed at 72-h intervals for 5-10 days.
Main Results:
- Intraosseous pressure > 35 mm Hg caused clinical signs of bone pain.
- Significantly increased bone mineral density (p < 0.05) was observed in all implanted tibias compared to controls.
- Continuous infusion led to significant increases in cancellous new bone formation, eroded bone surface, and osteoclast-covered bone surface (p < 0.05).
- High-pressure infusion did not yield significant bone changes; bone alterations correlated with infusion duration rather than peak pressure.
Conclusions:
- The Osteoport implant facilitates intraosseous infusion with potential for fewer complications than traditional vascular access methods.
- Sustained, moderate increases in intraosseous pressure (via CI) significantly impact bone remodeling.
- Bone changes appear more sensitive to the duration of elevated intraosseous pressure than to the magnitude of the pressure itself.