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Penetration of disposable needles.
International Journal of Oral Surgery
|April 1, 1979
Summary
Disposable injection needles vary in pain and penetration force. Needle point design, particularly secondary bevels, significantly impacts tissue penetration and patient pain, with most tested needles meeting this design requirement.
Area of Science:
- Medical Devices
- Biomedical Engineering
- Pain Management
Background:
- Disposable injection needles are crucial for medical procedures.
- Variability in needle design can affect patient comfort and procedure efficacy.
- Understanding needle characteristics is vital for improving clinical practice.
Purpose of the Study:
- To clinically evaluate pain intensity and penetration capacity of six disposable injection needle types.
- To identify key needle design features influencing penetration and pain.
- To assess compliance with optimal needle point design for effective tissue penetration.
Main Methods:
- Clinical testing of six distinct disposable injection needle types.
- Measurement of penetration force required for each needle type (120-250 mN).
- Microscopic examination of needle point design, focusing on bevels.
Main Results:
- Significant variation in required penetration force (120-250 mN) across different needle types.
- Needle point design, specifically secondary bevels, was the primary determinant of penetration capacity and pain intensity.
- Most tested needles featured the necessary secondary bevels for effective tissue penetration.
Conclusions:
- Needle point geometry, particularly secondary bevels, is critical for minimizing pain and maximizing penetration.
- Optimized needle design can enhance patient comfort during injections.
- The majority of current disposable injection needles possess favorable design characteristics for clinical use.