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Related Concept Videos

Forced Oscillations01:06

Forced Oscillations

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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.
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Measurement of Blood Pressure01:17

Measurement of Blood Pressure

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Assessing blood pressure is a standard procedure executed in virtually all medical environments. The method utilized today was established over a hundred years ago by an innovative Russian doctor, Dr. Nikolai Korotkoff. The soft ticking noise, known as Korotkoff sounds, heard while taking blood pressure readings results from turbulent blood flow within the vessels. The apparatus required for this procedure includes a sphygmomanometer, a blood pressure cuff attached to a gauge, and a...
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Pulse Oximetry01:24

Pulse Oximetry

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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...
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Assessment of blood pressure in brachial artery(two-step method)01:23

Assessment of blood pressure in brachial artery(two-step method)

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Measuring blood pressure is a fundamental skill in healthcare that aids in diagnosing and monitoring hypertension and other cardiovascular conditions. An aneroid sphygmomanometer, commonly used in clinical settings, offers a manual and precise method for blood pressure measurement. The technique for using this instrument involves specific steps that must be carefully executed to ensure accuracy. The following detailed description outlines a two-step technique for assessing blood pressure using...
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Special considerations while measuring oxygen saturation01:19

Special considerations while measuring oxygen saturation

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Assessing respiratory rate concurrently with pulse measurement is fundamental to patient care, providing valuable insights into the patient's respiratory function. The normal breathing rate for an adult usually falls within a normal range of 12 to 20 breaths per minute. Abnormal respiratory rates can signal underlying health conditions or the need for immediate intervention.
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Assessment of blood pressure in brachial artery(one-step method)01:15

Assessment of blood pressure in brachial artery(one-step method)

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This procedural guide systematically measures blood pressure using an oscillometric digital sphygmomanometer, emphasizing accuracy, patient safety, and comfort.
Prepare for the Procedure:
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Related Experiment Video

Updated: Nov 7, 2025

Employing the Forced Oscillation Technique for the Assessment of Respiratory Mechanics in Adults
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Employing the Forced Oscillation Technique for the Assessment of Respiratory Mechanics in Adults

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Within-session reproducibility of forced oscillometry.

Per Wollmer1, Ellen Tufvesson2, André Wennersten3

  • 1Clinical Physiology and Nuclear Medicine Unit, Department of Translational Medicine, Lund University, Lund, Sweden.

Clinical Physiology and Functional Imaging
|April 29, 2021
PubMed
Summary
This summary is machine-generated.

Forced oscillation technique (FOT) measurements show minimal within-session variability. A single FOT measurement may be sufficient for epidemiological studies, reducing patient burden and time.

Keywords:
chronic obstructive pulmonary diseaseepidemiologyforced oscillometrypulmonary function testswithin-session variability

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Area of Science:

  • Respiratory Mechanics
  • Pulmonary Physiology
  • Epidemiological Research Methods

Background:

  • Forced oscillation technique (FOT) offers detailed respiratory mechanics assessment with minimal patient cooperation.
  • FOT can detect abnormalities not seen in spirometry and correlates with airway symptoms.
  • Limited data exists on the within-session variability of FOT measurements, impacting its use in large studies.

Purpose of the Study:

  • To investigate the within-session variability of FOT measurements.
  • To assess FOT measurement consistency in a large, population-based sample.

Main Methods:

  • Three consecutive FOT measurements were conducted using the impulse oscillometry system in 700 participants.
  • The first FOT measurement was compared against the mean of three measurements for key parameters: R5, R20, R5-R20, X5, and fres.

Main Results:

  • Minimal differences were observed between the first and the mean of three FOT measurements for resistance (R5) and reactance (X5).
  • Variability was consistent across genders and between individuals with and without airflow obstruction.
  • Findings indicate high reliability of FOT measurements within a single session.

Conclusions:

  • A single FOT measurement demonstrates sufficient reliability for use in epidemiological studies.
  • While three FOT measurements are recommended for clinical settings, one may suffice for large-scale research.
  • This finding supports the efficiency of FOT in population studies.