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

Pulse01:16

Pulse

2.2K
When the heart pumps blood out, arterial elastic fibers play a crucial role in sustaining a high-pressure gradient. They expand to accommodate the received blood and then recoil - a process known as the pulse that can be either manually palpated or electronically quantified. Despite a reduction in its effect with increased distance from the heart, elements of the pulse's systolic and diastolic components persist, observable even at the arteriole level.
The pulse serves as a clinical...
2.2K
Pulse01:05

Pulse

4.2K
The pulse is one of the most fundamental physiological indicators of the body's cardiovascular health. It is the rhythmic expansion and contraction of the arterial walls in response to the pressure generated by the heart's pumping action.
Pulse Rate and its Significance
Pulse rate, often measured in beats per minute (bpm), reflects the heart rate (HR), which is influenced by numerous factors such as stress, physical activity, and hormonal changes. A normal resting adult pulse rate falls...
4.2K
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

1.8K
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.
1.8K
Pulse Oximetry01:24

Pulse Oximetry

1.4K
Pulse oximetry, or SpO2, is a non-invasive method for continuously monitoring arterial oxygen saturation (SaO2). This procedure involves attaching a probe or sensor to the patient's fingertip, forehead, earlobe, or nose bridge. The sensor works by detecting changes in oxygen saturation levels through light signals generated by the oximeter and reflected by the pulsing blood under the probe.
Purpose
Average SpO2 values are greater than 95%. If the readings fall below 90%, it indicates that...
1.4K
Regulation of Pulse01:20

Regulation of Pulse

2.3K
Pulse regulation involves physiological mechanisms that ensure adequate blood flow throughout the body. The heartbeat, regulated by the autonomic nervous system, is influenced by hormonal balance, physical activity, and emotional state.
2.3K
Pulse rhythm01:30

Pulse rhythm

1.4K
Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
1.4K

You might also read

Related Articles

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

Sort by
Same author

Successful treatment of hereditary hypotrichosis simplex by platelet rich plasma injection with topical minoxidil 2.

The Journal of dermatological treatment·2023
Same author

Facial rejuvenation by microneedling with irradiated amniotic collagen matrix compared to platelet rich plasma.

Dermatologic therapy·2022
Same author

Podoplanin as a Predictive Marker for Identification of High-Risk Mycosis Fungoides Patients: An Immunohistochemical Study.

Indian journal of dermatology·2021
Same author

Efficacy and safety of plasma gel as a new modality in treatment of atrophic acne scars.

International journal of dermatology·2020
Same author

Evaluation of the effect of combined intralesional injection of prostaglandin F2α with narrow band UVB phototherapy in treatment of resistant cases of vitiligo.

The Journal of dermatological treatment·2019
Same author

Relationship between Trace Elements and Premature Hair Graying.

International journal of trichology·2019

Related Experiment Video

Updated: Feb 14, 2026

Intense Pulsed Light for the Treatment of Dry Eye Owing to Meibomian Gland Dysfunction
05:00

Intense Pulsed Light for the Treatment of Dry Eye Owing to Meibomian Gland Dysfunction

Published on: April 1, 2019

15.7K

Pulsed dye laser versus intense pulsed light in melasma: a split-face comparative study.

Arwa M Hassan1, Nashwa N Elfar1, Omnia M Rizk2

  • 1a Dermatology and Venereology Department , Tanta University , Tanta , Egypt.

The Journal of Dermatological Treatment
|February 20, 2018
PubMed
Summary

Pulsed dye laser (PDL) and intense pulsed light (IPL) effectively treat melasma by reducing vascular components. Both therapies showed significant improvement, with IPL demonstrating higher efficacy in epidermal melasma.

Keywords:
Pulsed dye laserVEGFintense pulsed lightmelasma

More Related Videos

Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
11:20

Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses

Published on: July 2, 2012

15.6K
Pulsed Laser Diode-Based Desktop Photoacoustic Tomography for Monitoring Wash-In and Wash-Out of Dye in Rat Cortical Vasculature
06:46

Pulsed Laser Diode-Based Desktop Photoacoustic Tomography for Monitoring Wash-In and Wash-Out of Dye in Rat Cortical Vasculature

Published on: May 30, 2019

8.9K

Related Experiment Videos

Last Updated: Feb 14, 2026

Intense Pulsed Light for the Treatment of Dry Eye Owing to Meibomian Gland Dysfunction
05:00

Intense Pulsed Light for the Treatment of Dry Eye Owing to Meibomian Gland Dysfunction

Published on: April 1, 2019

15.7K
Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
11:20

Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses

Published on: July 2, 2012

15.6K
Pulsed Laser Diode-Based Desktop Photoacoustic Tomography for Monitoring Wash-In and Wash-Out of Dye in Rat Cortical Vasculature
06:46

Pulsed Laser Diode-Based Desktop Photoacoustic Tomography for Monitoring Wash-In and Wash-Out of Dye in Rat Cortical Vasculature

Published on: May 30, 2019

8.9K

Area of Science:

  • Dermatology
  • Aesthetic Medicine
  • Phototherapy

Background:

  • Emerging evidence suggests a vascular component in melasma.
  • Vascular targeting lasers and light treatments offer potential therapeutic benefits for melasma patients.

Purpose of the Study:

  • To compare the efficacy and tolerability of pulsed dye laser (PDL) and intense pulsed light (IPL) for melasma treatment.
  • To evaluate the impact of these treatments on vascular endothelial growth factor (VEGF) expression.

Main Methods:

  • A comparative study involving 28 Egyptian female patients with melasma.
  • Treatment administered with PDL on one hemiface and IPL on the contralateral hemiface.
  • Clinical assessment using the modified Melasma Area and Severity Index (mMASI) and immunohistochemical analysis of VEGF.

Main Results:

  • Both PDL and IPL significantly reduced hemifacial mMASI scores.
  • IPL demonstrated higher efficacy than PDL, particularly for epidermal melasma and lesions with vascular components.
  • A significant reduction in VEGF expression and intensity was observed in both treatment groups.

Conclusions:

  • Both PDL and IPL are effective and safe treatment options for melasma.
  • The reduction in VEGF expression suggests a potential mechanism of action for both laser and light therapies in melasma treatment.