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Related Concept Videos

Lung Capacity01:47

Lung Capacity

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The air in the lungs is measured in volumes and capacities. Lung volume measures reflect the amount of air taken in, released, or left over after a lung function, like a single inhalation. Lung capacity measures are sums of two or more lung volume measures.
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Cardiomyopathy VII: Pre and Post Operative Nursing Management01:28

Cardiomyopathy VII: Pre and Post Operative Nursing Management

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Patients with hypertrophic cardiomyopathy (HCM) and left ventricular outflow tract (LVOT) obstruction who remain symptomatic despite optimal medical therapy may undergo a septal myectomy (Morrow procedure). This procedure involves excising a portion of the hypertrophied septum below the aortic valve using a heart-lung machine to improve blood flow through the LVOT. Effective preoperative and postoperative nursing management ensures successful patient outcomes, minimizes complications, and...
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Respiratory Capacities01:24

Respiratory Capacities

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Respiratory capacities are crucial indicators of lung function, representing the maximum amount of air an individual's respiratory system can handle during various breathing phases.
One key metric is the Inspiratory Capacity (IC), which represents the maximum amount of air that can be inhaled with full effort. IC is calculated by summing the tidal volume and inspiratory reserve volume, typically ranging from 2.4 to 3.6 liters.
The Functional Residual Capacity (FRC) represents the air in the...
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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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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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Pneumothorax-II01:27

Pneumothorax-II

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Pneumothorax is a medical condition defined by the buildup of air in the pleural space between the lungs and the chest wall. This accumulation of air can lead to partial or complete lung collapse, resulting in a range of clinical manifestations. Understanding the clinical presentation and effective management strategies is crucial for healthcare professionals in providing timely and appropriate care to individuals with pneumothorax.
Clinical Manifestations:
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Related Experiment Video

Updated: Apr 17, 2026

Home-Based Prescribed Pulmonary Exercise in Patients with Stable Chronic Obstructive Pulmonary Disease
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Home-Based Prescribed Pulmonary Exercise in Patients with Stable Chronic Obstructive Pulmonary Disease

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Predicting postoperative exercise capacity after major lung resection.

Yoshinori Nagamatsu1, Susumu Sueyoshi2, Tatsuji Tsubuku2

  • 1Department of Thoracic Surgery, Omuta City Hospital, 2-19-1 Takarazaka-machi, Omuta, Fukuoka, 836-8567, Japan. nagam2@nifty.com.

Surgery Today
|February 10, 2015
PubMed
Summary

Preoperative lung perfusion scintigraphy and subsegment resection count can predict postoperative exercise capacity. This method helps estimate residual maximal oxygen uptake (VO2 max/m2) for better patient outcomes.

Keywords:
Exercise testingLung cancer surgeryLung physiologyPostoperative care

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Area of Science:

  • Pulmonary Medicine
  • Cardiopulmonary Exercise Testing
  • Surgical Outcomes Research

Background:

  • Assessing postoperative exercise capacity is crucial for patient management after lung resection.
  • Predicting functional outcomes aids in surgical decision-making and patient counseling.

Purpose of the Study:

  • To determine if preoperative lung perfusion scintigraphy and the number of resected subsegments can predict postoperative exercise capacity.
  • To establish a reliable method for estimating predicted postoperative maximal oxygen uptake (ppo VO2 max/m2).

Main Methods:

  • A cohort of 315 patients undergoing lung resection was studied.
  • Predicted postoperative VO2 max/m2 was calculated using lung perfusion scintigraphy and planned subsegment resections.
  • Regression equations were derived and validated to compare predicted values with actual postoperative measurements at 2 weeks and 1 month.

Main Results:

  • Regression equations demonstrated a strong correlation between predicted and actual postoperative VO2 max/m2.
  • The derived equation for 2 weeks postoperatively was y = 0.83x + 103.
  • The equation for 1 month postoperatively was y = 0.923x + 82, with minimal differences observed after correction.

Conclusions:

  • Preoperative assessment using lung perfusion scintigraphy and subsegment resection count is effective for predicting postoperative exercise capacity.
  • This predictive model aids in estimating residual VO2 max/m2, improving the accuracy of functional outcome predictions.
  • The findings support the clinical utility of this non-invasive method in preoperative planning for lung surgery.