2015 ISAKOS Biennial Congress ePoster #1283
A New Method for Evaluation of the Neovascularization on Human Anterior Cruciate Ligament Autografts
Naoki Takata, MD, PhD, Kochi JAPAN
Nobuhiro Abe, MD, PhD, Prof., Okayama JAPAN
Takayuki Furumatsu, MD, PhD, Okayama JAPAN
Shinichi Miyazawa, MD, PhD, Okayama JAPAN
Toshifumi Ozaki, MD, PhD, Prof., Okayama JAPAN
Tadashi Miyamoto, MD, Kurashiki JAPAN
Naoaki Kahara, MD, PhD, Kurashiki JAPAN
Chikamori Hospital, Kochi, JAPAN
FDA Status Cleared
Summary: The NBI system was useful for evaluation of the neovascularization on the surface of reconstructed graft.
ePoster Not Provided
The narrow band imaging (NBI) system is a unique sequential electronic endoscope system with an ordinary lighting system, and this system can yield very clear images of microvessels. The purpose of this study is to report a new evaluation method of the neovascularization on the human anterior cruciate ligament (ACL) autografts using the NBI system and to assess hemodynamic status of reconstructed grafts.
Materials And Methods
9 patients (mean age, 24.4 years) who underwent anatomic double-bundle ACL reconstruction with hamstring tendons were studied. We performed second-look arthroscopy combined with NBI system in their reconstructed knees at an average of 12 months (range 9-13 months) after surgery. We measured the proportion of the vessels to proximal, middle and distal portions of the reconstructed graft using imageJ. Mann-Whitney U test was used for statistical analysis. Reproducibility was assessed using the interclass correlation coefficient (ICC).
The neovascularization on the surface of reconstructed graft were clearly observed in the NBI images. The blood vessels in the proximal portion were abundant compared with distal portion. The density of vessels was higher in proximal portion than in the other two portions (P<0.05 by the Mann-Whitney U test). Inter-observer and intra-observer reproducibility were relatively high.
The NBI system was useful for evaluation of the neovascularization on the surface of reconstructed graft. The neovascularization of the proximal portion was superior as compared with that of the middle and distal portions.