J Korean Neurosurg Soc.  2019 Jul;62(4):382-388. 10.3340/jkns.2018.0130.

Biomechanical Properties of the Cranial Dura Mater with Puncture Defects: An In Vitro Study

• Aydın HE
• Kızmazoglu C
• Kaya I
• Husemoglu
• Sozer G
• Havıtcıoglu H
• Arslantas

• KMID: 2463668
• DOI: http://doi.org/10.3340/jkns.2018.0130

Abstract

OBJECTIVE
The primary aim of this investigation was to explore the nature of dura mater biomechanics following the introduction of puncture defect(s).
METHODS
Twenty-eight dura mater specimens were collected during autopsy from the department of forensic medicine of the authors' institution. Specimens were divided randomly into one of four groups : group I (cranial dura mater; n=7), group II (cranial dura mater with one puncture defect; n=7); group III (cranial dura mater with two puncture defects; n=7), and group IV (cranial dura mater with three puncture defects; n=7).
RESULTS
The mean±standard deviation tensile strengths of the dura mater were 8.35±3.16, 8.22±3.32, 7.13±1.77, and 6.94±1.93 MPa for groups I, II, III, and IV, respectively. There was no statistical difference between all groups. A single, two or more punctures of the dura mater using a 20-gauge Quincke needle did not affect cranial dura tensile strength.
CONCLUSION
This biomechanical study may contribute to the future development of artificial dura mater substitutes and medical needles that have a lower negative impact on the biomechanical properties of dura mater.

Keyword

Biomechanical phenomena; Dura mater; Tensile strength; Punctures; Needles

MeSH Terms

Autopsy
Biomechanical Phenomena
Dura Mater*
Forensic Medicine
In Vitro Techniques*
Needles
Punctures*
Tensile Strength

Figure

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  Fig. 1. A : Dimensions of the cranial dura mater specimens showing. B : Dimensions of the 20 G Quincke needle (Egemen International Inc., Izmir, Turkey). SL : shoulder length, GL : gauge length, GW : gauge width, TL : total length.

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  Fig. 2. A and B : The bevel tip needle stylet and needle cannula.

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  Fig. 3. Puncture defects before the uniaxial tension test. A : One-puncture defect (arrow). B : Two-puncture defects (arrow). C : Three puncture defects (arrow).

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  Fig. 4. The test setup (A) and white arrows show (B, left to right) heating element, waterproof sensor, digital thermometer controller.

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  Fig. 5. This figure shows the curves resulting from the equations for the stress/strain ratio. Stress-strain curves for all groups (n=28) with a displacement rate of 10 mm/min.

Reference

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