WCE 2018: Novel Retrieval Deployment Device allows for Fast and Ergonomically Efficient Single Surgeon Ureteroscopy

Paris, France (UroToday.com) Kevin Koo presented data evaluating the ergonomics and procedural time of ureteroscopic stone extraction using a retrieval deployment device (RDD). This device, pictured below in Figure 1, attaches to the head of a LithoVue Scope and allows a single surgeon to simultaneously control the ureteroscope and activate a stone basket. Traditionally this task requires two surgeons: one to control the ureteroscope, and one to operate the stone basket.

In this study three groups were evaluated:

Group 1: (Two Person) one managed the ureteroscope and the other managed the retrieval tool.
Group 2: (Single Person) a single operator managed both the ureteroscope and retrieval tool.
Group 3: (RDD) a single operator managed the ureteroscope conventionally, but utilized the RDD.

Fifteen total tasks were performed for each group and procedure time was recorded. Electromyography was used to measure cumulative muscular workload of the right and left thenar, flexor carpi ulnaris, extensor carpi ulnaris, biceps, triceps, and deltoid muscles.

The results can be seen in the tables below. Median procedure time was significantly lower when using the TDD. Cumulative Muscular Workload was similar between RDD and two-person groups but both were lower across all muscle groups compared to the single-person group (p < 0.01).

Dr. Kevin Koo concluded that the novel RDD, permitted a single surgeon to perform flexible ureteroscopy with stone manipulation and retrieval using less muscular workload with improve task completion times.

Presented by: Kevin Koo, MD
Authors: Gregory Joice, Wesley Ludwig, Zeyad Schwen, Michael Gorin
Affiliation: Johns Hopkins University School of Medicine

Written by: Renai Yoon, Department of Urology, University of California-Irvine, medical writer for UroToday.com at the 36th World Congress of Endourology (WCE) and SWL - September 20-23, 2018 Paris, France

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