Study finds similar glycocalyx biomarkers with isoflurane, sevoflurane

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A randomized, prospective study in the Journal of Veterinary Emergency and Critical Care found no significant difference in serum endothelial glycocalyx biomarkers between dogs anesthetized with isoflurane and those anesthetized with sevoflurane. The investigators measured syndecan-1 and hyaluronan, two biomarkers used to assess glycocalyx injury, and reported that while hyaluronan concentrations decreased significantly after anesthesia, the choice of inhalant anesthetic did not appear to change biomarker concentrations. The finding adds a small but useful piece of evidence to an area of growing veterinary interest around endothelial glycocalyx integrity, peri-anesthetic physiology, and biomarker interpretation. (bmcanesthesiol.biomedcentral.com)

Why it matters: For veterinary professionals, the practical takeaway is that this study does not support switching between isoflurane and sevoflurane solely to reduce measurable glycocalyx shedding in otherwise comparable anesthetized dogs. That matters because glycocalyx biomarkers such as syndecan-1 and hyaluronan are increasingly discussed in critical care, sepsis, trauma, and fluid therapy research, but their behavior in routine anesthesia remains incompletely defined. The post-anesthetic drop in hyaluronan also suggests peri-anesthetic biomarker shifts may not always reflect straightforward endothelial injury, reinforcing the need for cautious interpretation in clinical and research settings. (pubmed.ncbi.nlm.nih.gov)

What to watch: Expect follow-up work to focus on whether anesthesia duration, fluid administration, illness severity, or higher-risk procedures have a greater effect on glycocalyx biomarkers than anesthetic choice alone. (pmc.ncbi.nlm.nih.gov)