研究目的
To compare the diagnostic performance of two online 3D-OFDI reconstruction systems (ver. 1.1 and ver. 1.2) in assessing the rewiring position into a jailed side branch after main vessel stenting for coronary bifurcation lesions.
研究成果
The new online 3D-OFDI reconstruction system (ver. 1.2) provides better diagnostic performance than the conventional online system (ver. 1.1) for assessing the rewiring position into a jailed SB, with significantly lower incidence of undetected stent struts and better diagnostic agreement.
研究不足
1. Potential risk of selection bias due to the retrospective study design at a single center. 2. Small number of patients (n = 45) limits the comparison of other factors that could affect the diagnostic performance. 3. The diagnostic performance of the offline 3D reconstruction software was not validated against a 'true' rewiring position.
1：Experimental Design and Method Selection:
Retrospective evaluation of diagnostic performances of conventional (ver.
2：1) and new (ver. 2) online 3D-OFDI reconstruction systems based on an offline 3D reconstruction system’s performance. Sample Selection and Data Sources:
Analyzed 45 patients’ 52 OFDI pullbacks with main vessel stenting followed by rewiring into a jailed SB for coronary bifurcation lesions.
3：List of Experimental Equipment and Materials:
LUNAWAVE? and FastView? intravascular imaging catheter (Terumo Corp., Tokyo), LUNAWAVE Offline viewer (ver.
4：1) (Terumo), INTAGE Realia? (Cybernet, Tokyo). Experimental Procedures and Operational Workflow:
OFDI images were obtained after guidewire rewiring into the SB. Automatic pullbacks were performed at 20 mm/s during contrast injection. Three-dimensional reconstructions of OFDI pullbacks were generated by three different systems.
5：Data Analysis Methods:
Counted the undetected stent struts in the polygon of confluence and assessed the diagnostic agreement regarding the rewiring position into a jailed SB by the three 3D reconstruction systems.
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