Related Experiment Video
Updated: Jan 28, 2026

Robotic Cochlear Implantation for Direct Cochlear Access
Published on: June 16, 2022
A hypothetical method for calculation of the access point, direction angle and access angle for percutaneous
Murat Akand1, Ahmet Buyukaslan2, Sema Servi3
1Selcuk University, School of Medicine, Department of Urology, Konya, Turkey.
This study proposes using computed tomography (CT) scans and cosine theorem calculations to precisely determine the optimal access point and angles for percutaneous nephrolithotomy (PCNL). This aims to improve the safety and success of kidney stone removal, especially for novice surgeons.
Area of Science:
- Urology
- Medical Imaging
- Surgical Navigation
Background:
- Urinary stone disease prevalence is rising globally.
- Percutaneous nephrolithotomy (PCNL) is a key minimally invasive treatment for renal stones.
- Gaining access during PCNL is critical but challenging, particularly for novice surgeons.
Purpose of the Study:
- To develop a mathematically based method for optimizing PCNL access.
- To enhance the safety, ease, and success rate of the PCNL procedure.
- To provide a practical solution for PCNL access challenges.
Main Methods:
- Utilizing computed tomography (CT) imaging data.
- Applying mathematical formulations, specifically the theorem of the cosine.
- Calculating optimal access point, direction angle, and access angle for stone targeting.
Main Results:
- The study hypothesizes that CT data and cosine theorem can accurately predict PCNL access parameters.
- This method aims to overcome limitations of existing techniques and navigation systems.
- Potential for improved surgical outcomes and reduced complications.
Conclusions:
- A novel, mathematically derived approach to PCNL access is proposed.
- This method leverages readily available CT imaging and established mathematical principles.
- It offers a promising, potentially routine-use solution for improving PCNL access.
Related Concept Videos
Contact Angle
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
Open Angle Glaucoma: Treatment
Drugs such as carbonic anhydrase inhibitors, α2- and...
Angle of Twist: Problem Solving
Angle Closure Glaucoma: Treatment
Design Example: Traverse Angle Computations
Angle of Twist - Elastic Range

