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Postoperative Quantitative Assessment of Reconstructive Tissue Status in a Cutaneous Flap Model Using Spatial Frequency Domain Imaging
Beckman Laser Institute and Medical Clinic, University of California, Irvine, 1002 Health Sciences Rd. East, Irvine, CA 92617, USA.
Aesthetic and Plastic Surgery Institute, University of California, Irvine 200 S. Manchester Ave., Suite 650, Orange, CA 92868, USA.
Aesthetic and Plastic Surgery Institute, University of California, Irvine 200 S. Manchester Ave., Suite 650, Orange, CA 92868, USA.
Beckman Laser Institute and Medical Clinic, University of California, Irvine, 1002 Health Sciences Rd. East, Irvine, CA 92617, USA.
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2011 (English)In: Plastic and reconstructive surgery (1963), ISSN 0032-1052, E-ISSN 1529-4242, Vol. 127, no 1, p. 117-130Article in journal (Refereed) Published
Abstract [en]

Background:

The purpose of this study was to investigate the capabilities of a novel optical wide-field imaging technology known as spatial frequency domain imaging to quantitatively assess reconstructive tissue status.

Methods:

Twenty-two cutaneous pedicle flaps were created on 11 rats based on the inferior epigastric vessels. After baseline measurement, all flaps underwent vascular ischemia, induced by clamping the supporting vessels for 2 hours (either arteriovenous or selective venous occlusions); normal saline was injected into the control flap and hypertonic-hyperoncotic saline solution was injected into the experimental flap. Flaps were monitored for 2 hours after reperfusion. The spatial frequency domain imaging system was used for quantitative assessment of flap status over the duration of the experiment.

Results:

All flaps demonstrated a significant decline in oxyhemoglobin and tissue oxygen saturation in response to occlusion. Total hemoglobin and deoxyhemoglobin were increased markedly in the selective venous occlusion group. After reperfusion and the administration of solutions, oxyhemoglobin and tissue oxygen saturation in those flaps that survived gradually returned to baseline levels. However, flaps for which oxyhemoglobin and tissue oxygen saturation did not show any signs of recovery appeared to be compromised and eventually became necrotic within 24 to 48 hours in both occlusion groups.

Conclusions:

Spatial frequency domain imaging technology provides a quantitative, objective method of assessing tissue status. This study demonstrates the potential of this optical technology to assess tissue perfusion in a very precise and quantitative way, enabling wide-field visualization of physiologic parameters. The results of this study suggest that spatial frequency domain imaging may provide a means for prospectively identifying dysfunctional flaps well in advance of failure.

Place, publisher, year, edition, pages
Ovid Technologies (Wolters Kluwer Health) , 2011. Vol. 127, no 1, p. 117-130
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:liu:diva-152332DOI: 10.1097/prs.0b013e3181f959ccPubMedID: 21200206OAI: oai:DiVA.org:liu-152332DiVA, id: diva2:1264993
Available from: 2018-11-21 Created: 2018-11-21 Last updated: 2018-11-21Bibliographically approved

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Saager, Rolf B.

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