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Related Concept Videos

Physical Assessment of the Respiratory Tract II: Inspection01:27

Physical Assessment of the Respiratory Tract II: Inspection

Physical assessment of the respiratory tract through inspection is a crucial step in understanding the patient's respiratory health. It provides insights into the functioning of the respiratory system, the musculoskeletal structure, and even the patient's nutritional status. This comprehensive approach involves observing several vital aspects: chest configuration, breathing patterns, respiratory rates, skin color, and use of accessory muscles.
Chest Configuration
The chest configuration can...
Alterations in Respiration II01:30

Alterations in Respiration II

There are numerous types of normal and abnormal respiration. Based on ventilatory movements, breathing patterns are classified as regular, deep, or shallow. Examples include Biot's breathing, Cheyne-Stokes respiration, Kussmaul's breathing, hyperventilation, and hypoventilation. Each pattern is clinically significant and aids in evaluating patients.
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes include...
Respiratory Volumes01:15

Respiratory Volumes

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...
Pressure Relationships in Thoracic Cavity01:24

Pressure Relationships in Thoracic Cavity

Breathing, otherwise known as pulmonary ventilation, is the process of air movement into and out of the lungs. The main mechanisms propelling pulmonary ventilation are atmospheric pressure (Patm), intra-pulmonary (Ppul ) or intra-alveolar pressure (Palv) within the alveoli, and intrapleural pressure (Pip) within the pleural cavity.
Breathing Mechanisms
Both intra-alveolar and intrapleural pressures rely on specific lung properties. The ability to breathe—allowing air to enter the lungs during...
Respiratory System Abnormal Finding I: Inspection and Percussion01:30

Respiratory System Abnormal Finding I: Inspection and Percussion

Respiratory system abnormalities are a significant concern in healthcare due to their potential to indicate underlying severe conditions like Chronic Obstructive Pulmonary Disease (COPD), asthma, and pneumonia. These abnormalities can often be detected through physical examination methods like inspection and percussion.
Inspection Findings
During an inspection, several findings may suggest the presence of respiratory distress or disease. Pursed-lip breathing, where exhalation is slowed by...
Assessment of Respiration01:23

Assessment of Respiration

The respiratory system's basic structures and primary functions lay the foundation for nurses' comprehensive respiratory assessments. This assessment includes subjective and objective data to gauge the patient's respiratory health.
Subjective Assessment: Nurses interview the patient to gather information directly during the subjective assessment. It includes questions about the individual's medical history, medications, and symptoms, focusing on past respiratory conditions like asthma or COPD,...

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Related Experiment Video

Updated: May 25, 2026

Dynamic Lung Tumor Tracking for Stereotactic Ablative Body Radiation Therapy
08:17

Dynamic Lung Tumor Tracking for Stereotactic Ablative Body Radiation Therapy

Published on: June 7, 2015

Changes in lung tumor shape during respiration.

E Kyriakou1, D R McKenzie

  • 1School of Physics, University of Sydney, NSW 2006, Australia. e.kyriakou@ physics.usyd.edu.au

Physics in Medicine and Biology
|February 1, 2012
PubMed
Summary
This summary is machine-generated.

Lung tumors can change shape during breathing. A study suggests tumor shape changes correlate with lung motion velocity, potentially impacting radiation therapy timing.

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Management of Respiratory Motion Artefacts in 18F-fluorodeoxyglucose Positron Emission Tomography using an Amplitude-Based Optimal Respiratory Gating Algorithm
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Detection of Lung Tumor Progression in Mice by Ultrasound Imaging
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Detection of Lung Tumor Progression in Mice by Ultrasound Imaging

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Last Updated: May 25, 2026

Dynamic Lung Tumor Tracking for Stereotactic Ablative Body Radiation Therapy
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Management of Respiratory Motion Artefacts in 18F-fluorodeoxyglucose Positron Emission Tomography using an Amplitude-Based Optimal Respiratory Gating Algorithm
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Management of Respiratory Motion Artefacts in 18F-fluorodeoxyglucose Positron Emission Tomography using an Amplitude-Based Optimal Respiratory Gating Algorithm

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Detection of Lung Tumor Progression in Mice by Ultrasound Imaging
04:43

Detection of Lung Tumor Progression in Mice by Ultrasound Imaging

Published on: February 27, 2020

Area of Science:

  • Medical Imaging
  • Radiology
  • Computational Anatomy

Background:

  • Lung tumors can exhibit shape changes due to respiratory motion.
  • Understanding tumor motion is crucial for effective radiation therapy planning.

Purpose of the Study:

  • To investigate lung tumor shape changes during respiration.
  • To analyze the relationship between tumor deformation and lung motion dynamics.

Main Methods:

  • Utilized respiratory-gated CT data.
  • Applied statistical shape modeling and image manipulation techniques.
  • Analyzed tumor behavior under two lung motion models: wave motion and quasistatic motion.

Main Results:

  • Observed that some lung tumors deform systematically during respiration, while others remain rigid.
  • Found a correlation between tumor strain and tumor velocity, supporting a wave motion model for lung dynamics.
  • This correlation may explain previous difficulties in observing tumor shape changes.

Conclusions:

  • Lung tumor shape changes are influenced by respiratory motion dynamics.
  • The findings suggest inertial effects are significant in tumor deformation.
  • Implications for optimizing radiation therapy gating strategies are discussed.