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Related Concept Videos

Assessment of Ventilation II: Respiratory Depth and Rhythm01:29

Assessment of Ventilation II: Respiratory Depth and Rhythm

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Respiratory Depth
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
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Radiological Investigation II: MRI and Ventilation Perfusion Scan01:30

Radiological Investigation II: MRI and Ventilation Perfusion Scan

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Description
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...
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Respiratory Volumes01:15

Respiratory Volumes

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Respiratory volumes are crucial metrics, meticulously measured to quantify the air exchanged in and out of the lungs during various phases of the breathing cycle. These precise measurements are vital for assessing lung function, diagnosing respiratory conditions, and monitoring overall respiratory health. Each parameter provides specific insights into the mechanics of breathing and the functional capacity of the lungs.
Tidal Volume (TV) Tidal volume (TV) is the air inhaled or exhaled in a...
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Respiratory Volumes and Capacities I01:26

Respiratory Volumes and Capacities I

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Assessing the respiratory rate and rhythm for a complete minute is crucial for evaluating the breathing pattern. Even a minor increase in the patient's average respiratory rate, by as little as three to five breaths per minute, is an early and vital indicator of respiratory distress. Patients with a respiratory rate exceeding twenty-four breaths per minute require close monitoring to determine the physiological alterations. This careful observation is essential for prompt recognition and...
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Respiratory Volumes and Capacities01:22

Respiratory Volumes and Capacities

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The respiratory system is responsible for the intake of oxygen and the expulsion of carbon dioxide from the body. Respiratory volumes describe the volume of air in the lungs at different phases of the respiratory cycle. Tidal volume is the air breathed in and out during normal, quiet breathing. Inspiratory reserve volume is the air that can be forcefully inspired beyond the tidal volume. In contrast, expiratory reserve volume refers to the air that can be expelled from the lungs after a normal...
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Assessment of Ventilation I: Respiratory Rate01:20

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Assessment of Ventilation
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:
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Three-Dimensional Phase Resolved Functional Lung Magnetic Resonance Imaging
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Thoracic Quantitative Dynamic MRI to Understand Developmental Changes in Normal Ventilatory Dynamics.

Yubing Tong1, Jayaram K Udupa1, Joseph M McDonough2

  • 1Medical Image Processing Group, Department of Radiology, University of Pennsylvania, Philadelphia, PA.

Chest
|August 10, 2020
PubMed
Summary
This summary is machine-generated.

Quantitative dynamic MRI reveals significant asymmetry in children's thoracic ventilatory components, with right-sided structures being larger. These dynamics change with age, highlighting the need for normative data in pediatric respiratory research.

Keywords:
normal thoracic functionpulmonary function testingquantitative dynamic MRIthoracic insufficiency syndromeventilatory pump

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Area of Science:

  • Pediatric respiratory physiology
  • Medical imaging analysis
  • Thoracic biomechanics

Background:

  • Normative quantitative measures of regional thoracic ventilatory dynamics are crucial for understanding pediatric thoracic growth and function.
  • Existing databases lack comprehensive data on these dynamic measures in children.

Purpose of the Study:

  • To quantify changes in ventilatory pump dynamics during childhood using thoracic quantitative dynamic MRI (QdMRI).
  • To establish normative data for regional thoracic ventilatory function in children.

Main Methods:

  • 51 dynamic MRI scans were analyzed to derive volumetric parameters for lungs, hemidiaphragms, and hemichest walls during tidal breathing.
  • Volume-based symmetry and functional coefficients were calculated to compare left and right sides and component contributions.
  • Statistical analyses compared volume components across four age-based groups.

Main Results:

  • Significant asymmetry was observed, with right thoracic components being larger than left (e.g., lung tidal volume ratio 1.56).
  • Lung volumes and hemichest wall tidal volumes increased substantially with age across the studied pediatric groups.
  • Diaphragm excursion and chest wall contributions to tidal volume showed age-related changes.

Conclusions:

  • Normal pediatric thoracic ventilatory components exhibit significant asymmetry and change with age.
  • Chest wall and diaphragm contributions to ventilation vary dynamically and with growth.
  • Thoracic QdMRI provides quantitative data essential for characterizing regional thoracic function and growth related to ventilation.