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

Angle of Twist - Elastic Range01:13

Angle of Twist - Elastic Range

Consider a cylindrical shaft with a length denoted by L and a consistent cross-sectional radius referred to as r. This shaft undergoes a torque at the free end. The highest shearing strain within the shaft is directly proportional to the twist angle and the radial distance from the shaft axis. When the shaft behaves elastically, this shearing strain can be articulated using variables such as the applied torque, radial distance, the polar moment of inertia, and the modulus of rigidity. By...
Angle of Twist: Problem Solving01:13

Angle of Twist: Problem Solving

An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the torque exerted...
Bending of Curved Members - Strain Analysis01:14

Bending of Curved Members - Strain Analysis

The mechanics of deformation in curved members, such as beams or arches, under bending moments, involve complex responses. When such a member, symmetric about the y-axis and shaped like a segment of a circle centered at point C, is subjected to equal and opposite forces, its curvature and surface lengths change significantly. This alteration results in the shift of the curvature's center from C to C', indicating a tighter curve.
The important part of bending analysis for such a member is the...
Deformations in a Transverse Cross Section01:21

Deformations in a Transverse Cross Section

When a material is subjected to uniaxial stress, it elongates or contracts in the direction of the applied force, and also undergoes changes in the perpendicular directions. This behavior is crucial for understanding how materials behave under stress and is governed by mechanical properties such as Poisson's ratio v, which measures the ratio of transverse strain to axial strain.
As the material stretches, it expands or contracts in orthogonal directions to the load. This phenomenon varies...
Stresses in a Shaft01:18

Stresses in a Shaft

The shaft PQ is subjected to a twisting force when equal and opposite torques are applied on either side. A section that cuts perpendicular to the shaft's axis at any arbitrary point R is examined to understand this. When the free-body diagram of the QR segment is analyzed, it reveals the shearing forces exerted by the PR portion onto the QR segment as the shaft experiences twisting.
Applying equilibrium conditions to the QR segment establishes that the internal shearing forces within the...
Torsion of Noncircular Members01:16

Torsion of Noncircular Members

Circular shafts undergoing torsional stress maintain their cross-sectional integrity due to their axisymmetric nature. This symmetry ensures an even distribution of stress, allowing the shaft to withstand torsion without distorting. In contrast, square bars, lacking this axial symmetry, experience significant distortion across their cross-sections when subjected to torsion, with the exception of along their diagonals and at lines connecting midpoints. A detailed examination of a cubic element...

You might also read

Related Articles

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

Sort by
Same author

An Evaluation of Skin and Immunological Responses after Using a Novel Cross-Linked Porcine-Based Dermal Injectable Collagen with Lidocaine for Nasolabial Fold Correction.

Journal of clinical medicine·2024
Same author

Evaluation of Collagen Dermal Filler with Lidocaine for the Correction of Nasolabial Folds: A Randomized, Double-Blind, Multicenter Clinical Trial.

Clinical, cosmetic and investigational dermatology·2024
Same author

Resuming Oral Feeding in Patients With Oral Squamous Cell Carcinoma With Free Anterolateral Thigh Flap Reconstruction.

Annals of plastic surgery·2021
Same author

Treatment and long-term follow-up of oral cancer postoperative sialorrhea with dermal sling operation.

Annals of plastic surgery·2015
Same author

Reconstruction for osteoradionecrosis of the mandible: superiority of free iliac bone flap to fibula flap in postoperative infection and healing.

Annals of plastic surgery·2014
Same author

A modified free chimeric osteocutaneous fibular flap design for head and neck reconstruction: experience on a series of 10 cases.

Microsurgery·2013
Same journal

Prediction or Recognition? Outcome-Proximal Variables in Models for Mature Arteriovenous Fistula Thrombosis.

Annals of vascular surgery·2026
Same journal

Re: "Contemporary Outcomes of Staged versus Primary Major Amputation for Severe Foot Infection".

Annals of vascular surgery·2026
Same journal

The Role of Large Bore Mechanical Thrombectomy Devices in Tumour Thrombus.

Annals of vascular surgery·2026
Same journal

Utility of Hand Grip Strength in Predicting Mortality Risk in Chronic Limb-Threatening Ischaemia.

Annals of vascular surgery·2026
Same journal

Precision Imaging Evaluation and Clinical Application Progress of Vascular Calcification in Lower Extremity Peripheral Artery Disease.

Annals of vascular surgery·2026
Same journal

Efficacy and Safety of Autologous Versus Prosthetic Grafts in the Repair of Popliteal Artery Aneurysms: A Systematic Review and Meta-Analysis.

Annals of vascular surgery·2026
See all related articles

Related Experiment Video

Updated: Jun 7, 2026

Kinetic Analysis of Vasculogenesis Quantifies Dynamics of Vasculogenesis and Angiogenesis In Vitro
11:03

Kinetic Analysis of Vasculogenesis Quantifies Dynamics of Vasculogenesis and Angiogenesis In Vitro

Published on: January 31, 2018

Quantitative relationship between vascular kinking and twisting.

Shyue-Yih Horng1, Chen-Kun Chen, Chao-Hsiang Lee

  • 1Division of Plastic Surgery, Department of Surgery, National Taiwan University Hospital, National Taiwan University, Taipei, Taiwan, Republic of China. handyang@ms36.hinet.net

Annals of Vascular Surgery
|November 2, 2010
PubMed
Summary
This summary is machine-generated.

Vascular kinking during microvascular free flap reconstruction is often caused by improper vessel positioning. Axial rotation of curved vascular pedicles from the neutral axis can prevent kinking, improving flap survival.

More Related Videos

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
11:00

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

Published on: July 19, 2016

Using Digital Image Correlation to Characterize Local Strains on Vascular Tissue Specimens
09:29

Using Digital Image Correlation to Characterize Local Strains on Vascular Tissue Specimens

Published on: January 24, 2016

Related Experiment Videos

Last Updated: Jun 7, 2026

Kinetic Analysis of Vasculogenesis Quantifies Dynamics of Vasculogenesis and Angiogenesis In Vitro
11:03

Kinetic Analysis of Vasculogenesis Quantifies Dynamics of Vasculogenesis and Angiogenesis In Vitro

Published on: January 31, 2018

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
11:00

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

Published on: July 19, 2016

Using Digital Image Correlation to Characterize Local Strains on Vascular Tissue Specimens
09:29

Using Digital Image Correlation to Characterize Local Strains on Vascular Tissue Specimens

Published on: January 24, 2016

Area of Science:

  • Plastic Surgery
  • Vascular Surgery
  • Microsurgery

Background:

  • Vascular thrombosis is a significant complication in microvascular free flap reconstruction.
  • Improper positioning leading to vascular kinking is a frequent cause of thrombosis.
  • Current recommendations advise placing vessels at a neutral axis to prevent kinking.

Purpose of the Study:

  • To investigate the causes of vascular thrombosis in microvascular free flap reconstruction.
  • To propose a method for preventing vascular kinking in challenging reconstructions.
  • To share clinical experiences on managing curved vascular pedicles.

Main Methods:

  • Analysis of clinical experiences with microvascular free flap reconstructions.
  • Observation of vascular pedicle positioning and its relation to kinking.
  • Correlation of vascular pedicle curvature with axial rotations.

Main Results:

  • Vascular kinking due to improper positioning is the most frequent cause of thrombosis.
  • Curved vascular pedicles often require axial rotation from the neutral position to avoid kinking.
  • The number of loops in a pedicle corresponds to the number of 360° axial rotations.

Conclusions:

  • Axial rotation of curved vascular pedicles is crucial for preventing kinking.
  • This technique has potential applications across various vascular surgery fields.
  • Proper pedicle management is key to successful microvascular reconstruction.