Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Frictional Forces on Screws01:17

Frictional Forces on Screws

1.2K
Screws are characterized by a helical ridge known as a thread wrapped around a cylindrical shaft. They are commonly used as fasteners to hold objects together or to transmit power and motion in machines. One type of screw that is particularly useful for transmitting power is the square-threaded screw.
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
1.2K
Self-Locking Screw01:16

Self-Locking Screw

1.6K
A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. One of the key features that can make a screw jack more effective and reliable is its self-locking capability.
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
1.6K
Design Consideration01:22

Design Consideration

186
Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key...
186
Screw: Problem Solving01:21

Screw: Problem Solving

415
In mechanical engineering, the interaction between a threaded screw shaft and a plate gear involves analyzing the resisting torque on the plate gear that can be overpowered when a specific torsional moment is applied to the shaft. To better comprehend this concept, consider a generic situation with a threaded screw shaft with a given mean radius and lead and a plate gear with a specified mean radius. The coefficient of static friction between the screw and gear is also provided.
To evaluate the...
415
Machines: Problem Solving I01:22

Machines: Problem Solving I

324
A toggle clamp is a mechanical device commonly used for holding and clamping objects in various applications, such as woodworking, metalworking, and assembly operations. Consider a toggle clamp subjected to a force of 200 N at the handle. The vertical clamping force can be calculated, provided the dimensions of the toggle clamp are known.
The toggle clamp system is a machine structure consisting of movable, pin-connected multi-force members that form a stabilized system to transmit forces. The...
324
Stress Concentrations in Circular Shafts01:18

Stress Concentrations in Circular Shafts

175
Consider the elastic torsion formula, which applies to a circular shaft with a consistent cross-section. This formula assumes that the shaft's ends are loaded with rigid plates firmly attached. However, in many cases, torques are applied to the shaft through mechanisms like flange couplings or gears, which are connected by keys inserted into keyways. This application method modifies the stress distribution near the point of torque application, causing it to deviate from the distributions...
175

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Intraoperative warning signs of a cystic duct entering the right hepatic duct during laparoscopic cholecystectomy: a case report.

Journal of surgical case reports·2026
Same author

Effects of a head-up position on stone retrieval efficiency and intrarenal pressure using a flexible navigable suction access sheath: an in vitro study.

Urolithiasis·2026
Same author

Laparoscopic Intraperitoneal Onlay Mesh Plus Repair of a Hernia Adjacent to a Vesicocutaneous Urinary Diversion: A Case Report.

Surgical case reports·2026
Same author

Artificial Intelligence-Based Objective Evaluation of Nerve-Sparing Status Combined With Preserved Urethral Length Predicts Urinary Continence Recovery After Robot-Assisted Radical Prostatectomy.

International journal of urology : official journal of the Japanese Urological Association·2026
Same author

The in vitro acquisition of CD11a by gastric cancer cells after contact with T cells via trogocytosis increases adhesion to endothelial cells.

Experimental cell research·2026
Same author

A Rare Case of Small Bowel Volvulus with Chylous Ascites Presumed to Be Caused by Multiple Congenital Adhesions in a Virgin Abdomen: A Case Report and Literature Review.

Surgical case reports·2026

Related Experiment Video

Updated: Jul 4, 2025

Cutting Procedures, Tensile Testing, and Ageing of Flexible Unidirectional Composite Laminates
07:53

Cutting Procedures, Tensile Testing, and Ageing of Flexible Unidirectional Composite Laminates

Published on: April 27, 2019

8.3K

A Low Mean Closing Load and a Decrease in Load Change at the Tip Increase the Comfort of Scissors.

Gaku Ota1, Yuji Kaneda1,2, Yoshitaka Maeda2

  • 1Department of Surgery, Jichi Medical University, Division of Gastroenterological, General and Transplant Surgery, Shimotsuke, JPN.

Cureus
|February 9, 2024
PubMed
Summary

Surgeons prefer surgical scissors that require less force to close and exhibit minimal load changes at the tip. These physical characteristics are key for developing objective quality control standards for surgical instruments.

Keywords:
cooper scissorskansei engineeringquality controlsurgical instrumentstacit knowledge

More Related Videos

Performing Microscope-Mounted Y-Shaped Cutting Tests
06:15

Performing Microscope-Mounted Y-Shaped Cutting Tests

Published on: January 20, 2023

1.8K
Scanning Electron Microscopic Evaluation of Surface Defects of Remover Retreatment File After Single and Multiple Uses
03:07

Scanning Electron Microscopic Evaluation of Surface Defects of Remover Retreatment File After Single and Multiple Uses

Published on: October 11, 2024

510

Related Experiment Videos

Last Updated: Jul 4, 2025

Cutting Procedures, Tensile Testing, and Ageing of Flexible Unidirectional Composite Laminates
07:53

Cutting Procedures, Tensile Testing, and Ageing of Flexible Unidirectional Composite Laminates

Published on: April 27, 2019

8.3K
Performing Microscope-Mounted Y-Shaped Cutting Tests
06:15

Performing Microscope-Mounted Y-Shaped Cutting Tests

Published on: January 20, 2023

1.8K
Scanning Electron Microscopic Evaluation of Surface Defects of Remover Retreatment File After Single and Multiple Uses
03:07

Scanning Electron Microscopic Evaluation of Surface Defects of Remover Retreatment File After Single and Multiple Uses

Published on: October 11, 2024

510

Area of Science:

  • Surgical Instrumentation
  • Biomechanical Engineering
  • Materials Science

Background:

  • Surgeons often rely on tactile feedback to assess surgical scissor sharpness and usability.
  • Objective quality control standards for surgical scissors are lacking, despite intuitive recognition of dull instruments.

Purpose of the Study:

  • To objectively evaluate the physical characteristics of surgical scissors.
  • To correlate these physical properties with surgeon-reported comfort.
  • To establish objective quality control standards for surgical scissors.

Main Methods:

  • Sensory evaluation by 31 surgeons rating comfort of Cooper scissors.
  • Measurement of load pressure and handle displacement during scissor closure.
  • Correlation analysis between comfort scores and mechanical measurements.

Main Results:

  • A strong negative correlation (r=-0.717) exists between surgeon comfort and the mean load required to close scissors.
  • A moderate negative correlation (r=-0.687) was found between comfort and the change in load at the scissor tip.
  • Change in load at the tip was identified as an independent factor influencing surgeon comfort.

Conclusions:

  • Surgeon comfort is directly related to lower mean closing loads and reduced load changes at the scissor tip.
  • Objective quality control for surgical scissors should incorporate mean load and tip load change metrics.
  • These findings can guide the development of superior surgical scissor designs and manufacturing standards.