Fine needle aspiration at endoscopic ultrasound with a novel side-port needle: a pilot experience

Background: Diagnostic yield of endoscopic ultrasound-guided fine-needle aspiration (EUS FNA) varies relating to the equipment used and the site targeted. Multiple needle passes are usually required to obtain a diagnosis. A new needle incorporating a side port carries a theoretical advantage regarding acquisition of cytological material. Methods: To demonstrate the safety and efficacy of the Olympus side-port needle across a spectrum of indications for EUS FNA, a prospective collection of 16 consecutive cases was undertaken at a tertiary gastroenterology referral centre in metropolitan Sydney, Australia. EUS FNA was performed with the novel Olympus side-port needle. EUS FNA was otherwise performed in the conventional fashion. The number of needle passes required for diagnosis, number of passes total, diagnosis on cytology and conclusive diagnosis were recorded. Results: Diagnostic material was obtained at the first pass in 56.2% of patients. Mean number of passes required to reach a diagnosis was 2.1. Diagnosis was made on first pass in 62.5% of solid non-lymph-node lesions. The diagnosis was reached in 94%. Conclusions: The novel side-port needle is safe and effective; further evaluation with a prospective randomized trial is warranted.