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

Impedances and Admittance01:23

Impedances and Admittance

In the realm of AC circuits, passive circuit elements like resistors, inductors, and capacitors take on a different character when characterized by phasor voltage and current. Their behavior is expressed through impedance, a vital concept in AC circuit analysis.
Impedance is a measure of resistance to sinusoidal current flow in an AC circuit. Unlike their behavior in DC circuits, where inductors appear as short circuits and capacitors as open circuits, the behavior of these components in AC...
RLC Series Circuits: Impedance01:29

RLC Series Circuits: Impedance

When current flow is opposed in a DC or AC circuit, it is referred to as resistance or impedance, respectively. Impedance plays a key role in determining the performance of AC circuits. It is represented by Z, which is a combination of resistance and reactance, and depends upon the angular frequency, measured in ohms.
Thus, the magnitude of the impedance is given by the following equation,
Impedance Combination01:21

Impedance Combination

Consider a string of christmas lights, each bulb symbolizing an impedance element. In this series configuration, the flow of electric current remains uniform across every component. This behavior aligns with Kirchhoff's Voltage Law (KVL), which asserts that the total impedance in such a setup equals the sum of individual impedances—akin to resistors in series. It follows that the voltage from the power source is distributed proportionally among these components, adhering to the voltage division...
Series Impedances: Three-Phase Line01:27

Series Impedances: Three-Phase Line

Calculating series impedances for a three-phase overhead line involves evaluating resistances and inductive reactances in a network with three-phase and multiple neutral conductors grounded at regular intervals.
Using Kirchhoff's laws, an integro-differential equation for the network is derived. This equation accounts for unbalanced phase currents, which may induce return currents through neutral wires and the earth, seeking the least impedance path. Earth return conductors can replace the...
Mesh Analysis for AC Circuits01:12

Mesh Analysis for AC Circuits

In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
Bode Plots Construction01:24

Bode Plots Construction

The Bode plot is an essential tool in control system analysis, mapping the frequency response of a system through a magnitude plot and a phase plot, both against a logarithmic frequency axis. To construct a Bode plot, consider the transfer function H(ω):

You might also read

Related Articles

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

Sort by
Same author

Detergent-Containing Toothpaste Decreases Esophageal Mucosal Impedance and Alters Salivary Properties in Humans.

Allergy·2026
Same author

Normal FLIP panometry analyzed by Dallas Consensus criteria reliably excludes actionable esophageal motility disorders and obviates the need for high-resolution manometry.

Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association·2026
Same author

Gatherings in Esophagology: Innovations and Future Directions in the Diagnosis and Management of Reflux Disease.

Annals of the New York Academy of Sciences·2026
Same author

[Diagnosis and Treatment of Eosinophilic Esophagitis].

Acta gastroenterologica Latinoamericana·2025
Same author

Authors' Reply to Letter-Ineffective Esophageal Motility and Gastroesophageal Reflux Disease.

Neurogastroenterology and motility·2025
Same author

A Standardized Approach to Performing and Interpreting Functional Lumen Imaging Probe Panometry for Esophageal Motility Disorders: The Dallas Consensus.

Gastroenterology·2025
Same journal

Living Donor Intestinal and Liver Transplantation.

Gastroenterology clinics of North America·2026
Same journal

Living Abdominal Organ Donation: A Plan B That Saves Lives.

Gastroenterology clinics of North America·2026
Same journal

Long-Term Outcomes of Living Liver Donors.

Gastroenterology clinics of North America·2026
Same journal

Perioperative Management of Living Liver Donor Patients.

Gastroenterology clinics of North America·2026
Same journal

Living Donor Liver Transplantation for Colorectal Cancer Liver Metastasis.

Gastroenterology clinics of North America·2026
Same journal

Living Donor Liver Graft in Adult Populations: Donor Selection and Workup.

Gastroenterology clinics of North America·2026
See all related articles

Related Experiment Video

Updated: May 13, 2026

Evaluation of Fluid Overload by Bioelectrical Impedance Vectorial Analysis
07:17

Evaluation of Fluid Overload by Bioelectrical Impedance Vectorial Analysis

Published on: August 17, 2022

Impedance-pH testing.

Nicolas Villa1, Marcelo F Vela

  • 1Division of Gastroenterology and Hepatology, Michael E. DeBakey VA Medical Center, Baylor College of Medicine, 2002 Holcombe Boulevard, Houston, TX 77030, USA.

Gastroenterology Clinics of North America
|March 5, 2013
PubMed
Summary
This summary is machine-generated.

Proton pump inhibitors (PPIs) are standard for gastroesophageal reflux disease, but persistent symptoms may indicate nonacid reflux. Impedance-pH monitoring can now measure nonacid reflux, improving diagnosis and treatment strategies for reflux patients.

More Related Videos

Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy
07:44

Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy

Published on: April 27, 2016

Performing Repeated Intraoperative Impedance Telemetry Measurements during Cochlear Implantation
06:54

Performing Repeated Intraoperative Impedance Telemetry Measurements during Cochlear Implantation

Published on: August 4, 2023

Related Experiment Videos

Last Updated: May 13, 2026

Evaluation of Fluid Overload by Bioelectrical Impedance Vectorial Analysis
07:17

Evaluation of Fluid Overload by Bioelectrical Impedance Vectorial Analysis

Published on: August 17, 2022

Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy
07:44

Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy

Published on: April 27, 2016

Performing Repeated Intraoperative Impedance Telemetry Measurements during Cochlear Implantation
06:54

Performing Repeated Intraoperative Impedance Telemetry Measurements during Cochlear Implantation

Published on: August 4, 2023

Area of Science:

  • Gastroenterology
  • Digestive Health
  • Medical Diagnostics

Background:

  • Gastroesophageal reflux disease (GERD) is commonly treated with proton pump inhibitors (PPIs) to suppress gastric acid.
  • A significant number of patients experience persistent symptoms despite adequate PPI therapy.
  • Ongoing symptoms may be attributed to nonacid reflux, which is not accurately measured by traditional methods.

Purpose of the Study:

  • To introduce impedance-pH monitoring as an advanced diagnostic tool for gastroesophageal reflux.
  • To explain the principles and clinical applications of impedance-pH monitoring.
  • To highlight its capability in measuring nonacid reflux, a limitation of conventional pH monitoring.

Main Methods:

  • Discussion of the principles underlying impedance-pH monitoring technology.
  • Details on the characteristics and proper placement of impedance-pH monitoring catheters.
  • Explanation of how to interpret the data generated by impedance-pH studies.

Main Results:

  • Impedance-pH monitoring allows for the detection and measurement of both acid and nonacid reflux events.
  • This technology overcomes the limitations of conventional ambulatory pH monitoring in assessing nonacid reflux.
  • Enables a more comprehensive evaluation of reflux patterns in patients with GERD.

Conclusions:

  • Impedance-pH monitoring represents a significant advancement in the assessment of gastroesophageal reflux.
  • It provides crucial insights into nonacid reflux, aiding in the management of patients with refractory GERD symptoms.
  • The article serves as a guide to understanding and utilizing this valuable diagnostic tool.