Photosealing of Dural Defects Using a Biocompatible Patch

Overview

Journal Acta Neurochir (Wien)

Specialty Neurosurgery

Date 2023 Jun 7

PMID 37284839

Authors

Nicholas C King

Fernando P S Guastaldi

Arjun R Khanna

Robert W Redmond

Jonathan M Winograd

Affiliations

Soon will be listed here.

Abstract

Purpose: Photosealing of many biological tissues can be achieved using a biocompatible material in combination with a dye that is activated by visible light to chemically bond over the tissue defect via protein cross-linking reactions. The aim of this study was to test the efficacy of photosealing using a commercially available biomembrane (AmnioExcel Plus) to securely close dural defects in comparison to another sutureless method (fibrin glue) in terms of repair strength.

Methods: Two-millimeter diameter holes were created in dura harvested from New Zealand white rabbits and repaired ex vivo using one of two methods: (1) in n = 10 samples, photosealing was used to bond a 6-mm-diameter AmnioExcel Plus patch over the dural defect, and (2) in n = 10 samples, fibrin glue was used to attach the same patch over the dural defect. Repaired dura samples were then subjected to burst pressure testing. Histological analysis was also performed of photosealed dura.

Results: The mean burst pressures of rabbit dura repaired with photosealing and fibrin glue were 302 ± 149 mmHg and 26 ± 24 mmHg, respectively. The increased repair strength using photosealing was statistically significant and considerably higher than the normal intracranial pressure of ~ 20 mmHg. Histology demonstrated a tight union at the interface between the dura surface and patch with no disruption of the dura structure.

Conclusion: The results of this study suggest that photosealing performs better than fibrin glue for the fixation of a patch for ex vivo repair of small dural defects. Photosealing is worthy of testing in pre-clinical models for the repair of dural defects.

Citing Articles

Comparison of Photochemically Sealed Commercial Biomembranes for Nerve Regeneration.

Bejar-Chapa M, Rossi N, King N, Kostyra D, Hussey M, McGuire K J Funct Biomater. 2025; 16(2).

PMID: 39997584 PMC: 11856221. DOI: 10.3390/jfb16020050.

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