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Olympus reviewed the following literature article: diagnostic yield of transbronchial cryobiopsy guided by radial endobronchial ultrasound and fluoroscopy in the radiologically suspected lung cancer: a single institution prospective study by vytautas ankudavicius, et al.Abstract transbronchial cryobiopsy (tbcb) is being studied in the diagnosis of peripheral lung lesions; however, there are only a few clinical studies around the world.The aim of our study was to evaluate the diagnostic values and safety of transbronchial cryobiopsy for radiologically suspected peripheral lung cancer.The prospective clinical study was executed from september 2019 to september 2021 at a tertiary clinical centre in lithuania.A total of 48 patients out of 102 underwent combined procedures of transbronchial forceps biopsy (tbfb) and tbcb.Diagnostic values and safety outcomes of tbfb and tbcb were analysed.The sensitivity, specificity, positive predictive value (ppv), negative predictive value (npv) and accuracy were 72.9%, 100%, 100%, 7.7%, and 88.0% for tbfb, 85.1%, 100%, 100%, 12.5%, and 93% for tbcb, as well as 91.5%, 100%, 100%, 20.0% and 96.7% for the combined procedures, respectively, with a significantly higher accuracy for cryobiopsies compared to forceps biopsies (p < 0.05).The diagnostic values for transbronchial cryobiopsies were similar, irrespective of the radial mini probe endobronchial ultrasound (rp-ebus) position, lesion size or bronchus sign, however, the sensitivity of the combined procedures in cases with rp-ebus adjacent to the target was significantly higher compared to tbfb (86.2% vs.64.3%, p = 0.016).Samples of cryobiopsies were significantly larger than forceps biopsies (34.62 mm2 vs.4.4 mm2, p = 0.001).The cumulative diagnostic yield of transbronchial cryobiopsy was 80.0% after the second biopsy and reached a plateau of 84.1% after four biopsies.No severe bleeding, pneumothorax, respiratory failure or death was registered in our study.Tbcb is a potentially safe procedure, which increases diagnostic values in diagnosing peripheral lung lesions compared to tbfb.All patients had the tbfb and the following olympus devices were used: bf-h190, ums20-17s or um-s20-20r, standard oval biopsy forceps suitable for 2.0 mm scope channels.Not all patients had tbcb and the following olympus devices were used: bf-h190, a 5¿7 fr endobronchial blocker (olympus, japan) balloon was inflated to stop bleeding./gm-418500, 14apr2022.Adverse events: moderate bleeding after tbcb, n=2.This article includes 4 reports: (b)(6): bf-h190, scope and moderate bleeding (b)(6): unknown 5¿7 fr endobronchial blocker olympus balloon and moderate bleeding (b)(6): um-s20-20r or ums20-17s, ultrasonic probe and moderate bleeding; um-s20-20r was selected as a representative product.(b)(6): fb-231k, disposable biopsy forceps and moderate bleeding this report is 2 of 4: (b)(6): unknown 5¿7 fr endobronchial blocker olympus balloon and moderate bleeding.
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This supplemental report is being submitted to provide additional information from the author.New information: b5, d1, d2, d3, d4, d10, g4.B3: corrected data.
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Correction: g2.This report is being supplemented to provide a correction and additional information based on the legal manufacturer's final investigation.New information was added to the following fields: h4, h6, h10.H4: june 2021 (exact date is undetermined).The device history record was not reviewed as there was no reported device malfunction.However, olympus only releases products to market that meet all manufacturing specifications and final product release criteria.Based on the results of the investigation, the relationship between the device and the adverse event cannot be confirmed.There was no complaint reported on the subject device.There is no evidence of an olympus device malfunction.Olympus will continue to monitor field performance for this device.
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