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

Forced Oscillations01:06

Forced Oscillations

When an oscillator is forced with a periodic driving force, the motion may seem chaotic. The motions of such oscillators are known as transients. After the transients die out, the oscillator reaches a steady state, where the motion is periodic, and the displacement is determined.
Muscle Stimulation Frequency01:22

Muscle Stimulation Frequency

The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
Frequency-dependent Selection01:21

Frequency-dependent Selection

When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
Frequency of Spring-Mass System01:17

Frequency of Spring-Mass System

One interesting characteristic of the simple harmonic motion (SHM) of an object attached to a spring is that the angular frequency, and the period and frequency of the motion, depend only on the mass and the force constant of the spring, and not on other factors such as the amplitude of the motion or initial conditions. We can use the equations of motion and Newton's second law to find the angular frequency, frequency, and period.
Consider a block on a spring on a frictionless surface. There...
Tracheostomy Suctioning I: Pre-Procedural Steps01:26

Tracheostomy Suctioning I: Pre-Procedural Steps

Tracheostomy suctioning is a critical procedure healthcare professionals perform to maintain a patent airway in patients with a tracheostomy tube. This procedure is necessary when secretions accumulate in the airway, causing respiratory distress. Here is a step-wise procedural guide for performing tracheostomy suctioning using an open system.
Equipment Required
First, gather all necessary equipment: a sterile suction catheter, a sterile disposable container, sterile gloves, a towel or...

You might also read

Related Articles

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

Sort by
Same author

Observation of WWγ Production and Search for Hγ Production in Proton-Proton Collisions at sqrt[s]=13  TeV.

Physical review letters·2024
Same author

New Structures in the J/ψJ/ψ Mass Spectrum in Proton-Proton Collisions at sqrt[s]=13  TeV.

Physical review letters·2024
Same author

Search for Scalar Leptoquarks Produced via τ-Lepton-Quark Scattering in pp Collisions at sqrt[s]=13  TeV.

Physical review letters·2024
Same author

Search for Inelastic Dark Matter in Events with Two Displaced Muons and Missing Transverse Momentum in Proton-Proton Collisions at sqrt[s]=13  TeV.

Physical review letters·2024
Same author

Evidence for the Higgs Boson Decay to a Z Boson and a Photon at the LHC.

Physical review letters·2024
Same author

Probing Small Bjorken-x Nuclear Gluonic Structure via Coherent J/ψ Photoproduction in Ultraperipheral Pb-Pb Collisions at sqrt[s_{NN}]=5.02  TeV.

Physical review letters·2024
Same journal

[POST-PARTUM SEPTIC SACROILIITIS- CASE REPORT AND REVIEW.]

Akusherstvo i ginekologiia·2018
Same journal

[TRANSVAGINAL LAPAROSCOPY FOR PELVIC ENDOMETRIOSIS.]

Akusherstvo i ginekologiia·2018
Same journal

[NEW TECHNIQUE FOR UTERINE ARTERY IDENTIFICATION.]

Akusherstvo i ginekologiia·2018
Same journal

[ULTRASOUND OF THE PLACENTA. NORMAL FINDINGS AND PLACENTAL ABNORMALITIES: A REVIEW.]

Akusherstvo i ginekologiia·2018
Same journal

[THE ROLE OF COLPOSCOPY AS A METHOD OF METHODOLOGY FOR EARLY AND RAPID ETIOLOGIC DIAGNOSIS IN THE STUDY OF ENDOCERVICITIS CHLAMYDIALIS.]

Akusherstvo i ginekologiia·2018
Same journal

[LAPAROSCOPIC MYOMECTOMY AFTER ULIPRISTAL ACFTATF TRFATMFMT.]

Akusherstvo i ginekologiia·2018
See all related articles

Related Experiment Video

Updated: May 23, 2026

In Vivo Measurement of Hindlimb Dorsiflexor Isometric Torque from Pig
09:41

In Vivo Measurement of Hindlimb Dorsiflexor Isometric Torque from Pig

Published on: September 3, 2021

[Frequency and characteristics for forceps delivery].

A Nikolov, S Nashar, E Pavlova

    Akusherstvo I Ginekologiia
    |April 7, 2012
    PubMed
    Summary
    This summary is machine-generated.

    Forceps delivery incidence decreased over 15 years, with most cases involving term infants. Outlet and low forceps remain crucial for operative vaginal birth, especially for preterm infants.

    More Related Videos

    Non-invasive Assessment of Dorsiflexor Muscle Function in Mice
    05:31

    Non-invasive Assessment of Dorsiflexor Muscle Function in Mice

    Published on: January 17, 2019

    High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
    08:50

    High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements

    Published on: May 12, 2023

    Related Experiment Videos

    Last Updated: May 23, 2026

    In Vivo Measurement of Hindlimb Dorsiflexor Isometric Torque from Pig
    09:41

    In Vivo Measurement of Hindlimb Dorsiflexor Isometric Torque from Pig

    Published on: September 3, 2021

    Non-invasive Assessment of Dorsiflexor Muscle Function in Mice
    05:31

    Non-invasive Assessment of Dorsiflexor Muscle Function in Mice

    Published on: January 17, 2019

    High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
    08:50

    High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements

    Published on: May 12, 2023

    Area of Science:

    • Obstetrics and Gynecology
    • Perinatal Medicine
    • Surgical Procedures

    Context:

    • Vaginal operative delivery rates, particularly those involving forceps, have seen shifts in practice over time.
    • Understanding the application of forceps in relation to fetal maturity is critical for obstetric decision-making.
    • The study examines a 15-year period at a university hospital to analyze trends in forceps use.

    Purpose:

    • To determine the incidence of forceps-assisted vaginal deliveries.
    • To analyze the degree of prematurity in newborns undergoing forceps extraction.
    • To identify the types of forceps utilized in obstetric practice.

    Summary:

    • The incidence of forceps extraction decreased from over 2% in 1994-1995 to below 1% by 2004.
    • Forceps were applied to term fetuses in 94.8% of cases and preterm fetuses in 5.2%.
    • Outlet forceps (74.65%) and low forceps (25.35%) were the predominant types used.

    Impact:

    • Forceps remain essential for operative vaginal birth, particularly for preterm infants where it's the sole method.
    • There is a declining trend in overall forceps use, with a shift towards outlet and low forceps.
    • This analysis provides insights into the evolving role and application of forceps in modern obstetrics.