|
Olympus reviewed the following literature titled "differentiating tuberculosis from sarcoidosis by sonographic characteristics of lymph nodes on endobronchial ultrasonography: a study of 165 patients." this retrospective study describes about differentiating tuberculosis from sarcoidosis by sonographic characteristics of lymph nodes on endobronchial ultrasonography.During the study period, 249 ebus-guided tbna procedures were performed and a diagnosis of sarcoidosis (n= 118) or tuberculosis (n= 47) was made in 165 patients.The convex probe ebus scope (bf-uc 180f, olympus medical systems, japan) with a 7.5 mhz convex transducer and a compatible endoscopic ultrasound scanner (eu-me1, olympus medical systems, japan) were used.Ebus tbna was performed in a standard fashion in the supine position by the oral route using a dedicated, disposable, 21-gauge, vizishot needle (na-201sx-4021, olympus medical systems, japan) under real-time sonographic and endoscopic visualization.A conventional fiber optic bronchoscope (bf-1t20 or bf-te2, olympus, japan; fb-19tv, pentax, japan) along with standard biopsy forceps (fb19c, olympus, japan) were used to perform the biopsies.A total of 358 lymph node stations were examined.Heterogeneous echotexture (53.4% vs 12.6%, p<.001) and coagulation necrosis (26.1% vs 3.3%; p<.001) were significantly higher in tuberculous lymph nodes.A combination of a positive tuberculin skin test (tst) and either heterogeneous echotexture or coagulation necrosis sign had specificity of 98% and positive predictive value of 91% for a diagnosis of tuberculosis.Two patients developed a pneumothorax after performing tblb.This study concluded that the sonographic features of heterogeneous echotexture or coagulation necrosis in the lymph nodes on ebus are fairly specific for tuberculosis.Along with a positive tst, these features strongly favor a diagnosis of tuberculosis over sarcoidosis.Type of adverse events/number of patients: pneumothorax - 2 patients.This literature article requires 2 reports.The related patient identifiers are as follows: (b)(6): fb-19c-1.(b)(6): bf-te2.This medwatch report is for patient identifier (b)(6).
|
|
This report is being supplemented to provide additional information based on the legal manufacturer's final investigation.The device history record was unable to be reviewed for this device since the lot number was not provided.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.
|