Abstract
Background
As a new-generation collagen stimulator, polycaprolactone (PCL) containing filler has been extensively applied in facial dermal fillers and other medical aesthetic fields. However, inadvertent intravascular injection of PCL may result in complications such as tissue edema, flap necrosis, and even blindness. To date, there is no effective treatment for PCL-induced intravascular embolism.
Objectives
The aim of this study was to identify a viable resolution for the embolism resulting from intravascular administration of PCL-containing fillers.
Methods
Two different animal experiments were performed: (1) PCL-induced rat inferior epigastric arteries embolism, followed by gross observation, histological evaluation, and cytokines analysis from serum; and (2) PCL-induced rabbit auricular artery embolism, immediately treated with heparin and nitroglycerin. The ears were then evaluated by gross observation, Laser speckle imaging, in vivo imaging system (IVIS) imaging, and histological evaluation. Saline and hyaluronic acids (HA) were used as controls, hyaluronidase was used as a positive drug.
Results
In a rat model of inferior epigastric arteries embolism, both intravascular injection of HA and PCL resulted in flap necrosis, indicating that the filler-induced intravascular embolism can lead to serious complications. In a rabbit model of auricular artery embolism, the combination treatment of heparin and nitroglycerin resulted in a relative blood reperfusion recovery of 80% in the ischemic area of the PCL group on day 7 post-operation, which was comparable to that of the HA group treated with hyaluronidase. Histological analysis revealed that the administration of heparin and nitroglycerin significantly attenuated intravascular thrombosis formation and inflammatory cell aggregation.
Conclusions
The combination of heparin and nitroglycerin effectively restores blood flow reperfusion in the intravascular embolization caused by PCL filler injection, alleviates local tissue edema and flap necrosis. These findings offer a novel approach for future clinical management of intravascular embolization with PCL-containing filler injection.
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The authors would like to thank Prof. for designing the experiment and critical revision of this manuscript.
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All animal procedures were conducted in accordance with the Guide for Care and Use of Laboratory Animals by the Institutional Animal Care and Use Committee of SLAC (Shanghai Laboratory Animal Center) 20230124011.
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Khan, A., Gong, L., Wang, Y. et al. Combination Administration of Heparin and Nitroglycerin for the Treatment of Polycaprolactone-Induced Intravascular Embolism: A Preclinical Investigation. Aesth Plast Surg (2024). https://doi.org/10.1007/s00266-024-03969-4
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DOI: https://doi.org/10.1007/s00266-024-03969-4