Abstract
Background and Aims
To facilitate access for interventional EUS, flexible (nitinol) 19-G needles have been introduced to permit needle puncture even when the echoendoscope is in an angulated position, such as in the second part of the duodenum. The aims of the study were to evaluate the performance of a flexible 19-G needle during interventional EUS procedures and compare outcomes when the echoendoscope was in the straight versus angulated position.
Methods
A retrospective review was undertaken of 162 consecutive patients that underwent a variety of interventional EUS procedures with a flexible 19-G needle across five centers. Patients were subdivided into categories (straight or angulated) depending on the echoendoscope position used for obtaining access to the area of interest (Fig. 1).
Results
In the entire cohort, needle-specific technical success was achieved in 93.2 %, procedural success in 85.2 %, and overall clinical success in 76.5 % of cases at a mean follow-up of 3.1 months. Needle-specific technical success was similar between the straight and angulated cohorts (94.0 vs. 91.2 %, p = 0.74). Procedural success (86.7 vs. 77.2 %, p = 0.05), and rate of clinical success was similar between the cohorts (83.3 vs. 86.4 %, p = 0.79), respectively. Overall adverse events were noted in 14.2 % of patients with no difference between the straight and angulated cohorts (p = 0.48).
Conclusions
This study demonstrates equivalent technical success, clinical success and safety of using a flexible 19-G needle in straight and angulated endoscope positions for interventional EUS. Therefore, a flexible needle may be considered where an angulated echoendoscope position is encountered.
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Author contributions
Vivek Kumbhari and Mouen A. Khashab developed the concept, wrote, and edited the final manuscript. All other authors were involved in data acquisition and editing and final approval of the manuscript.
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Jonathan M. Bucaglia is a consultant for Boston Scientific. Payal Saxena is a consultant for Boston Scientific and has received consulting fees from Olympus Australia, Cook Medical, Pentax Medical and research support from Cook Medical. Mouen A. Khashab is a consultant for Boston Scientific and Olympus America and has received research support from Cook Medical. All other authors have no relevant disclosures.
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Kumbhari, V., Peñas, I., Tieu, A.H. et al. Interventional EUS Using a Flexible 19-Gauge Needle: An International Multicenter Experience in 162 Patients. Dig Dis Sci 61, 3552–3559 (2016). https://doi.org/10.1007/s10620-016-4327-7
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DOI: https://doi.org/10.1007/s10620-016-4327-7