Biomedical subjects

Lee Swanström

Publications and source records attributed to Lee Swanström.

2 recordsLinked to original sources

PubMed2006

Development of advanced endoscopes for Natural Orifice Transluminal Endoscopic Surgery (NOTES).

Natural orifice transluminal endoscopic surgery (NOTES) is a hybrid procedure which uses flexible endoscopic technology to perform laparoscopic surgical procedures within the abdominal cavity. Initial reports of animal studies describe the use of standard endoluminal endoscopes to accomplish intra-abdominal surgeries. Current flexible scopes suffer from several deficiencies which make them unlikely to be able to be used for large scale human NOTES experiences. This review analyzes the deficiencies of current endoscopes, discusses the requirements of the ideal NOTES endoscope and reviews some of the possible "endoscopes of the future" that are being developed for the next generation of surgery. Discussion focuses on the "R" scope (Olympus, Tokyo, Japan) and the Transport and Cobra scopes (USGI Medical, San Capistrano, CA).

Endoscopes↗

PubMed2006

Effects of assembling virtual fixtures on learning a navigation task.

An approach to enhance navigation task performance is to integrate sensory guidance (virtual fixtures) into a virtual training system. To evaluate the effects of adding virtual fixtures to skill acquisition, 32 subjects were required to use a PHANToM input device, to transport a virtual object through a computer generated 3-D graphic maze. Subjects practiced navigation under 4 conditions: the maze was augmented with either a graphic fixture (G), attractive force field (F), both graphic and force field (GF), or no (N) virtual fixture. Fifteen practice trials were given before subjects were transferred to a situation with no virtual fixtures. Results showed that the implementation of the force field assisted task performance during practice; however, it failed to show positive transfer effects. In contrast, adding a graphic fixture to the virtual maze helped subjects to define the optimal pathway throughout navigation, which facilitated skill acquisition.

Computer Simulation↗