Digital twin guides safer ventriculoperitoneal shunt catheter placement
Feasibility of a Patient-Specific Digital Twin for Ventriculoperitoneal Shunt Trajectory Planning
Computer Vision and Pattern Recognition
Summary
Shunt failures often happen because the tube gets blocked. The authors created a patient-specific digital model that helps doctors find the best spot and angle to put in the shunt tube based on CT scans. They tested this approach on 11 patients and found that it helped place the tube more accurately and safely compared to traditional methods. This new method may reduce the need for future surgeries, but that still needs to be tested.
What this means in practice
- •For neurosurgeons: Plan ventriculoperitoneal shunt insertion with patient-specific CT models to improve catheter placement accuracy and reduce surgical risks.
- •For medical device developers: Develop planning tools that incorporate patient CT-based digital twins to optimize catheter trajectories for shunt placement.$Commercial implications: Enables development of software that personalizes catheter insertion paths, improving surgical outcomes and marketability of neurosurgical planning systems.
Authors
Kritsanavis Chongsrid, Vich Yindeedej, Supaporn Konmun, Xulei Yang, Si Yong Yeo
Abstract
Catheter obstruction is the commonest cause of shunt failure; freehand insertion at Keen's point leaves the tip free in cerebrospinal fluid in only one case in ten. We built a digital twin that reconstructs skull, scalp, ear and ventricles from preoperative CT by deterministic geometry, searches every entry around Keen's point for the perpendicular trajectory with the longest intraventricular length under safety constraints, and returns the plan as two ruler measurements from the ear and two depths. Executed freehand in 11 consecutive adults (IDEAL Stage 2a), it achieved Hayhurst Grade 1 placement in 10 of 11 against 22 of 213 historically (p = 9 x 10^-9), median entry and angular deviations 2.5 mm and 5.9 degrees, 1.4 cm more intraventricular catheter than Keen's point, and no intraoperative complication. The technique was unchanged; the gain came from choosing entry and depth per patient. Whether it lowers revision is the next stage's hypothesis.