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Article type: Research Article
Authors: Strauss, Catharina; * | Anker, Alexandra | Klein, Silvan | Kemper, Robert | Brebant, Vanessa | Prantl, Lukas | Geis, Sebastian
Affiliations: Department of Plastic, Hand and Reconstructive Surgery, University of Regensburg, Regensburg, Germany
Correspondence: [*] Corresponding author: Catharina Strauss, MD, Department of Plastic, Hand and Reconstructive Surgery, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany. E-mail: catharina_strauss@hotmail.com.
Abstract: BACKGROUND:Early detection and treatment of vascular complications in replanted digits is essential for the survival. The perfusion index (PI) represents a marker of peripheral perfusion as it shows the ratio of pulsatile to non-pulsatile blood flow. OBJECTIVE:To evaluate the feasibility and applicability of the PI as a monitoring tool for free flaps and replanted digits by measuring the inter- and intraindividual changes in PI. METHODS:Five patients were postoperatively monitored according to intern standards by hourly clinical evaluation. Additionally, a pulse oximeter with SET-technology® (Masimo Radial 7, Masimo Corporation, Irvine, USA) was added with a LNCS® Red TFA-1 SpO2 sensor (Masimo Corporation, Irvine, USA) and respectively a LNCS® Neo-3 neonatal finger clip to evaluate the perfusion via PI and SpO2. RESULTS:All patients showed sufficient perfusion in clinical controls. There was no detectable vascular complication during follow-up. Mean perfusion index was 0.93 with a median of 0.44. The patients showed a mean SpO2 of 90.59%with a median of 89.21%. CONCLUSION:Our results show a great intra- and interindividual range of PI and SpO2. SpO2 provided an even greater range than PI. Trends in intraindividual PI changes may be a promising monitoring tool for free flaps and replanted digits.
Keywords: Perfusion index, monitoring, free flap, replanted digits
DOI: 10.3233/CH-211295
Journal: Clinical Hemorheology and Microcirculation, vol. 80, no. 4, pp. 363-371, 2022
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