Quantitative Luminescence Photography of a Swellable Hydrogel Dressing with a Traffic-Light Response to Oxygen.

Autor: Marks HL; Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02129, USA., Cook K; Department of Chemistry, Boston University, Boston, MA, 02215, USA., Roussakis E; Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02129, USA., Cascales JP; Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02129, USA., Korunes-Miller JT; Department of Biomedical Engineering, Boston University, Boston, MA, 02215, USA., Grinstaff MW; Department of Chemistry, Boston University, Boston, MA, 02215, USA.; Department of Biomedical Engineering, Boston University, Boston, MA, 02215, USA., Evans CL; Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02129, USA.
Jazyk: angličtina
Zdroj: Advanced healthcare materials [Adv Healthc Mater] 2022 May; Vol. 11 (10), pp. e2101605. Date of Electronic Publication: 2022 Feb 18.
DOI: 10.1002/adhm.202101605
Abstrakt: Sensor-integrated wound dressings are emerging tools applicable to a wide variety of medical applications from emergency triage to at-home monitoring. Uncomfortable, unnecessary wound dressing changes may be avoided by providing quantitative insight into tissue characteristics related to wound healing such as tissue oxygenation, pH, and exudate/transudate volume. Here, a simple cost-effective methodology for quantifying oxygen and pH in a swellable hydrogel dressing using a single photograph is presented. The red and green luminescence of a novel dendritic polyamine Pt-porphyrin and fluorescein conjugate quantitatively responds to oxygen and pH, respectively, and enables robust sensing. The porphyrin conjugate, when combined with a four-arm star polyethylene glycol (PEG) amine polymer, rapidly crosslinks at room temperature with an N-hydroxysuccinimide (NHS)-PEG crosslinker to form a color-changing hydrogel dressing with tunable swelling capabilities applicable to a variety of wound environments. An inexpensive digital single-lens reflex (DSLR) camera modified with bandpass filters captures the hydrogel luminescence using simple macroscopic photography, and conversion to HSB colorspace allows for intensity-independent image analysis of the hydrogels' dual modality response. The hydrogel formulation exhibits a robust and validated visible red-orange-green "traffic light" spectrum in response to oxygen changes, regardless of swelling state, pH, or autofluorescence from skin, thereby enabling the clinician friendly naked-eye feedback.
(© 2022 Wiley-VCH GmbH.)
Databáze: MEDLINE
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