Archives of Plastic Surgery

Korean Society of Plastic and Reconstructive Surgeons (대한성형외과학회)
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Intraoperative near-infrared spectroscopy for pedicled perforator flaps: a possible tool for the early detection of vascular issues

  • Marchesi, Andrea (Department of Plastic Surgery, Hand Surgery and Reconstructive Microsurgery, Ospedale San Gerardo) ;
  • Garieri, Pietro (Department of Plastic Surgery, Hand Surgery and Reconstructive Microsurgery, Ospedale San Gerardo) ;
  • Amendola, Francesco (Department of Plastic Surgery, Hand Surgery and Reconstructive Microsurgery, Ospedale San Gerardo) ;
  • Marcelli, Stefano (Department of Plastic Surgery, Hand Surgery and Reconstructive Microsurgery, Ospedale San Gerardo) ;
  • Vaienti, Luca (Department of Plastic Surgery, Hand Surgery and Reconstructive Microsurgery, Ospedale San Gerardo)
  • Received : 2019.03.09
  • Accepted : 2021.05.21
  • Published : 2021.07.15
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Abstract

Background Pedicled perforator flaps can present postoperative complications similar to those encountered in free flap surgery. Beyond a clinical evaluation, there is still no reliable technical aid for the early prediction of vascular issues. The aim of this study was to assess the support of near-infrared spectroscopy technology as an intraoperative tool to anticipate postsurgical flap ischemia. Methods We prospectively enrolled 13 consecutive patients who were referred to our hospital from March 2017 to July 2018 and required a reconstructive procedure with a pedicled fasciocutaneous perforator flap. We measured flap peripheral capillary oxygen saturation (SpO2) in each patient with a Somanetics INVOS 5100C Cerebral/Somatic Oximeter (Medtronic), both before and after transposition. Patient demographics, operative data, and complications were then recorded during the following 6 months. We analyzed the data using the Wilcoxon signed-rank test and linear regression. Results The mean flap SpO2 before and after transposition was 92%±3% and 78%±19%, respectively. The mean change in SpO2 was 14%±17%, with a range of 0% to 55%. The change in saturation and mean saturation ratio were significantly different between patients with and without postoperative flap necrosis. Conclusions An immediate quantitative analysis of flap peripheral capillary SpO2 after transposition has never before been described. In our experience, an intraoperative drop in SpO2 equal to or greater than 15%-20% predicted vascular complications in pedicled perforator flaps. Conversely, flap size and rotation angle were not correlated with the risk of flap necrosis.

Keywords

References

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