Directed balloon cytology of the esophagus: A novel device for obtaining circumferential cytologic sampling.

OBJECTIVE: Current methods of obtaining esophageal cytology include brush biopsy and blind balloon sampling, among others. These methods can be time-consuming if performed in accordance with acknowledged standards. Further, exact site localization can prove to be difficult. We describe a novel device for esophageal sampling using an esophageal balloon with debriding strips contained within the pleats of the balloon. Inflation brings the latter in contact with the surface to be sampled. Cell capture was compared with the commonly used brush technique in a pig model.

METHODS: Separate balloon and standard brush cytology samples were collected from a pig model. Smear and cell pellet preparations were compared regarding cell density and total volume.

RESULTS: Adequate samples were obtained with both the brush and balloon. On the cell smear preparations, the cell density was greater when obtained with balloon sampling. Further, the cell pellet volume was significantly greater with the latter as well. The intact morphology of individual rafts of squamous epithelial cells also was comparable between the two methods. In addition, the balloon provided precise mapping of the cytology sites in contrast to the standard brush technique.

CONCLUSION: We present an innovative new balloon technology for esophageal sampling, which demonstrated a decreased sampling time interval, precise mapping, and increased cellular volume when compared to a commonly used brush technique.

LEVEL OF EVIDENCE: NA. Laryngoscope, 127:1032-1035, 2017.