Author + information
Coronary stent deployment outcomes can be negatively impacted by inaccurate lesion measurement and inappropriate stent length selection (SLS). We compared the manual measurement of these parameters to those provided by the CorPath 200® Robotic PCI System.
Sixty consecutive patients who underwent coronary stent placement utilizing the CorPath System were evaluated. The treating physician assessed orthogonal images and provided visual estimates of lesion length and SLS. The robotic system was then used for the same measures. SLS was considered to be accurate when manual and robotic measures were in agreement. Manual SLSs were considered to be “short” or “long” if they were below or above the robotic-selected stents, respectively.
Only 35% (21/60) of visually estimated lesions resulted in accurate SLS. Whereas, 33% (20/60) and 32% (19/60) of the manually-determined SLSs were long and short, respectively. In 5 cases (8.3%), 1 less stent was placed based on the robotic lesion measurement being shorter than the visual estimate (TABLE 1).
Manual assessment of lesion length and SLS is highly variable with 65% of the cases being inaccurately measured when compared to objective measures obtained from the robotic system. The 32% of the cases where lesions were visually estimated to be short represents cases that often require the use of extra stents after the full lesion is not covered by 1 stent [Longitudinal Geographic Miss (LGM)]. Further, these data showed that the use of the robotic system prevented the use of extra stents in 8.3% of the cases. Measurement of lesions with robotic PCI may reduce measurement errors, need for extra stents, and LGM.
|Case||Visual Measurement (mm)||Visual Stent Length Selection (mm)||CorPath Measurement (mm)||Final Stent Length Chosen (mm)|