We have developed a swallowable tethered capsule OCT endomicroscopy (TCE) device that acquires microscopic images of the entire esophagus in unsedated subjects in a quick and comfortable procedure. To test its capabilities of TCE to become a population-based screening device, we conducted a clinical feasibility study in the primary care office. The swept-source OCT imaging system (1310nm central wavelength, 40kHz A-line rate, 10um axial resolution) together with the tethered capsule catheter (11x25mm capsule attached to a flexible tether) were transferred to the PCP office where unsedated patients scheduled for non-urgent PCP visits swallowed the capsule and microscopic OCT images of the entire esophagus were collected. After the whole length of the esophagus was imaged, the catheter was disinfected for reuse. Twenty subjects were enrolled in the study, including nine female and eleven male. All TCE procedures were performed by a nurse and lasted in average 5:42 ± 1:54 min. High-resolution images of the esophagus were obtained in all seventeen subjects that swallowed the capsule.
Our clinical experience in this cohort, subject feedback, image quality, and technological adaptations for efficient utilization in this setting will be presented. The ease and simplicity of the procedure combined with high quality of the images demonstrate the potential for this technology to become a population-based screening device. Technology limitations and future development guided by findings from this initial experience will be discussed with the goal of effectively translating TCE to the outpatient primary care setting.
Michalina J. Gora, Leigh H. Simmons, Aubrey R. Tiernan, Catriona N. Grant, Amna R. Soomro, Elizabeth S. Walker Corkery, Mireille Rosenberg, Joshua P. Metlay, and Guillermo J. Tearney, "Tethered capsule OCT endomicroscopy: from bench to bedside at the primary care office (Conference Presentation)," Proc. SPIE 9691, Endoscopic Microscopy XI; and Optical Techniques in Pulmonary Medicine III, 969106 (Presented at SPIE BiOS: February 14, 2016; Published: 27 April 2016); https://doi.org/10.1117/12.2211393.4828146985001.
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