The application of 3D motion analysis in surgical evaluation and training; a pilot study.

Aim: To evaluate whole body, forearm, hand and surgical tool movements during various stitching tasks in experienced surgeons and final year medical students. Objectives: To determine the time required to complete each surgical task. To analyse the body centre of mass, neck, elbow, forearm and hand kinematics, the distance travelled by the surgical tool to determine the reliability, repeatability and compare differences of the aforementioned objective measures within and between surgeons and students. Method: A Cross-sectional 3D motion analysis pilot study designed. Five volunteer surgeons and five medical students were included. Retro-reflective markers were affixed to each participant’s skin on specific palpated anatomical landmarks and on a silicon suturing pad and surgical tools. Result: Experienced surgeons required significantly less time to complete each task. Their body centre of mass as well as their neck ROM were significantly smaller. The surgical tool also travelled less distance when used by surgeons (p[less than]0.05). Repeatability was higher in surgeons (ICC>0.70) compared to students (ICC>0.55). Conclusion: It is feasible to evaluate the surgical competences of junior surgeons from the very earliest years of their training. Optical Motion Capture System is a promising tool in Surgical Skills Teaching & Training

Topological spaces containing compact perfect sets and prohorov spaces

AbstractLet X be a Suslin-Borel set in a compact space. It is proved that X is either σ-scattered or contains a compact perfect set. If X is first countable, the result remains valid when X is a Suslin-Borel set in a Prohorov space. It is also proved that every first countable Prohorov space is a Baire space

Consonance and Cantor set-selectors

It is shown that every metrizable consonant space is a Cantor set-selector. Some applications are derived from this fact, also the relationship is discussed in the framework of hyperspaces and Prohorov spaces.peer-reviewe

TOPOLOGICAL-SPACES CONTAINING COMPACT PERFECT SETS AND PROHOROV SPACES

AbstractLet X be a Suslin-Borel set in a compact space. It is proved that X is either σ-scattered or contains a compact perfect set. If X is first countable, the result remains valid when X is a Suslin-Borel set in a Prohorov space. It is also proved that every first countable Prohorov space is a Baire space