  This paper presents a technique to concurrently and jointly predict the
future trajectories of surgical instruments and the future state(s) of surgical
subtasks in robot-assisted surgeries (RAS) using multiple input sources. Such
predictions are a necessary first step towards shared control and supervised
autonomy of surgical subtasks. Minute-long surgical subtasks, such as suturing
or ultrasound scanning, often have distinguishable tool kinematics and visual
features, and can be described as a series of fine-grained states with
transition schematics. We propose daVinciNet - an end-to-end dual-task model
for robot motion and surgical state predictions. daVinciNet performs concurrent
end-effector trajectory and surgical state predictions using features extracted
from multiple data streams, including robot kinematics, endoscopic vision, and
system events. We evaluate our proposed model on an extended Robotic
Intra-Operative Ultrasound (RIOUS+) imaging dataset collected on a da Vinci Xi
surgical system and the JHU-ISI Gesture and Skill Assessment Working Set
(JIGSAWS). Our model achieves up to 93.85% short-term (0.5s) and 82.11%
long-term (2s) state prediction accuracy, as well as 1.07mm short-term and
5.62mm long-term trajectory prediction error.
