Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New training instrument allows surgeon to feel grasp force in keyhole surgery

25.01.2011
The number of complications following keyhole surgery can be reduced by giving the surgeons a better feeling of how hard they are grasping the tissue with their operating instruments.

This is made possible by designing the instrument in such a way that it sends tangible feedback signals to the handle held by the surgeon. Delft University of Technology researcher Eleonora Westebring-van der Putten has developed a working prototype for this.

Grasp force

Keyhole surgery has rapidly gained in popularity in hospitals. An exploratory operation – known as a laparoscopy when carried out in the abdominal cavity – is generally less invasive for the patient. But a laparoscopy calls for different manual skills than 'ordinary' open surgery. Training in these skills is therefore essential for the prevention of complications.

Problems with keyhole surgery partly arise because it is very difficult to gauge the force of the surgeon's grasp. The surgeon is therefore less able to determine whether he or she is grasping the tissue too hard or too gently.

Tangible

Industrial designer and human movement scientist Eleonora Westebring-van der Putten's research is focused on the improvement of grasp control and the learning of the associated skills. The solution is to give the surgeon tangible physical feedback through his or her instrument. "Experiments have shown that augmented feedback on the grasp force is a good way for surgeons of all levels to gain a better command of gauging laparoscopic grasp force."

Cylinder

Westebring has therefore developed a working prototype of a laparoscopic grasp instrument that gives augmented tangible feedback on the amount of grasp force being applied. This prototype therefore gives the surgeon the required tangible feedback. "There are sensors in the tip of the instrument that measure how hard the surgeon is grasping. This information is fed back to the handle, which contains a cylinder that can turn in relation to the hand, as if something is falling out of your hand. In this way the cylinder indicates that the surgeon has too little grip, and is therefore grasping too gently."

Vibrations

"The handle also contains vibrating elements, which start to vibrate if the surgeon is grasping too hard, while also taking account of how hard the surgeon is pulling. The harder he or she pulls on the tissue, the less hard he or she should grasp. We also take the type of tissue into account. After all, it makes quite a difference whether you are grasping an intestine or working with a liver."

Training

In the future an instrument such as Westebring's could be used in training for real operations. "By training with feedback, surgeons learn to control their laparoscopic grasp force more quickly. The forces they apply are lower." What is more, the effect seems to last. "When the feedback signal is removed, the surgeons can still carry out the procedure with reduced force. The feedback therefore helps with the control of the laparoscopic grasp force, even if it is only used in training."

Ilona van den Brink | EurekAlert!
Further information:
http://www.tudelft.nl

More articles from Medical Engineering:

nachricht Can radar replace stethoscopes?
14.08.2018 | Friedrich-Alexander-Universität Erlangen-Nürnberg

nachricht Novel PET imaging method could track and guide therapy for type 1 diabetes
03.08.2018 | Society of Nuclear Medicine and Molecular Imaging

All articles from Medical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Color effects from transparent 3D-printed nanostructures

New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference

Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...

Im Focus: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

Im Focus: The “TRiC” to folding actin

Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.

Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

LaserForum 2018 deals with 3D production of components

17.08.2018 | Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

 
Latest News

Smallest transistor worldwide switches current with a single atom in solid electrolyte

17.08.2018 | Physics and Astronomy

Robots as Tools and Partners in Rehabilitation

17.08.2018 | Information Technology

Climate Impact Research in Hannover: Small Plants against Large Waves

17.08.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>