Gasless laparoscopy is a new development in the field of laparoscopic/keyhole surgery. A mechanical device is used instead of carbon dioxide to lift the abdominal wall creating a cavity for the surgeons to work within. In rural locations the infrastructure and equipment may not be available for conventional laparoscopic surgery, however since gasless laparoscopy requires less specialist equipment it is much more accessible and more affordable. The problem with gasless laparoscopic surgery is that the amount of force required to lift the abdominal wall sufficiently is dependent on the surgeon’s experience, and may cause abdominal trauma if done incorrectly. No quantitative or qualitative feedback mechanism is known that shows if the retraction force on the lift device is sufficient to create the required cavity.
A ‘tent like cavity created by the lift device
The aim of our project is to create a mechanical force sensor for a lift device to provide an estimation of the force a surgeon is exerting on the abdominal wall. The force feedback from the sensor will help surgeons to avoid abdominal wall trauma by preventing them from using too much force whilst lifting. The sensor must be entirely mechanical so that it can be used in regions with limited electricity supply. Secondary goals of the project are to create an abdominal wall box trainer that will simulate the mechanical properties of the abdominal wall – much better than the piece of fabric that is currently in use.
3D model of current design
We are currently 3 weeks into our project and are well on our way to
creating a prototype of the device. To begin, we conducted a literature review to condense all the critical information, such as the mechanical properties of the abdominal wall, which has been published in journals. The current lift system was also modelled in a 3D design software as it has not been well documented, making it hard to reproduce. Several concepts were designed for the force measurement device and the final design shown is now being manufactured so that we can begin the testing process.
We have also spent time researching materials that have similar mechanical properties to the abdominal wall to be used in our box trainer. We are now in the process of learning how to fabricate some reinforced silicone that has similar properties, and is readily available.
Box trainer currently in use
- Liao, C.H., Kuo, I.M., Fu, C.Y., Chen, C.C., Yang, S.J., Ouyang, C.H., Wang, S.Y., Chen, S.W., Hsu, Y.P. and Kang, S.C., 2014. Gasless laparoscopic assisted surgery for abdominal trauma. Injury, 45(5), pp.850-854.
Academics and researchers from Delft University of Technology visited the University of Leeds on 6th/7th June 2018. Professor Jenny Dankleman, Professor in Minimally Invasive Surgery and Interventional Techniques, Roos Oosting, PhD student and Julie Fleischer, researcher in the field of Global Surgery at the Department of BioMechanical Engineering.
Professor Dankleman delivered a seminar speech for the Robotics at Leeds Seminar Series. Click here for more information and abstract for the seminar. Following the seminar there was a tour of the STORM laboratory and Surgical Technologies facilities within the Faculty of Engineering.
A series of talks and a workshop were held to formulate research collaborations in surgical engineering for low resource settings were held on 7th June 2018 at St James’s University Hospital.
The Millennium Alliance program is organised by the Federation of Indian Chambers of Commerce and Industry (FICCI) and the Department of Science and Technology, Government of India to encourage innovations that have significant impact on the Society. The awards attract thousands of applications and undergo a rigorous process of selection. One of the awardees in 2018 in the Health Sector was Dr J Gnanaraj, our PI from SEESHA Karunya Hospital.
Click here for the Millennium Alliance award webpage for more details of the project.