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Measuring temperature rise during orthopaedic surgical procedures.
Sarah Manoogian1, Adam K Lee2, James C Widmaier2
1Mechanical Engineering, Bucknell University, 1 Dent Drive, Lewisburg, PA 17837, USA .
Medical Engineering & Physics
|June 2, 2016
Summary
Accurate surgical temperature measurement is crucial for preventing osteonecrosis. A standard screw with a predrilled hole generated the lowest bone temperatures during insertion, suggesting a safer surgical practice.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Surgical Innovation
Background:
- Elevated temperatures during orthopedic screw insertion can lead to osteonecrosis, compromising fixation device success.
- Current methods for measuring intraoperative temperatures lack reliability for establishing best practices.
- Minimizing thermal damage is essential for optimal bone healing and implant integration.
Purpose of the Study:
- To evaluate reliable methods for measuring bone temperatures during surgical screw insertion.
- To compare the thermal effects of different screw insertion techniques.
- To identify surgical practices that minimize the risk of osteonecrosis.
Main Methods:
- Twenty-four screw insertion tests were performed across three surgical procedures.
- Temperature measurements were taken using thermocouples placed in the bone and within the screw.
- Statistical analyses were conducted to compare temperature trends between procedures.
Main Results:
- Screw-mounted thermocouples recorded significantly higher maximum temperatures (92.7–204.4°C) than bone-mounted thermocouples (31.8–77.3°C).
- A consistent temperature trend was observed across procedures, regardless of measurement location (screw or bone).
- A standard screw with a predrilled hole exhibited the lowest maximum temperatures and shortest duration compared to other methods.
Conclusions:
- Accurate temperature measurement during screw insertion is vital for developing surgical best practices.
- Measuring temperature directly within the screw provides a more sensitive indicator of thermal rise.
- Utilizing a predrilled hole with a standard screw appears to be the safest technique regarding thermal effects.
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