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Acute Respiratory Failure-IV

Acute Respiratory Failure-IV

Respiratory failure can manifest suddenly or gradually, characterized by a rapid decline in PaO2 and a rapid rise in PaCO2. This situation indicates a severe respiratory problem that may quickly become a life-threatening emergency. One of the early signs of hypoxemic Acute Respiratory Failure (ARF) is a change in mental status due to the brain's sensitivity to oxygen levels and changes in acid-base balance. Symptoms such as restlessness, confusion, and agitation suggest inadequate oxygen...

Breathing

Breathing

The process of breathing, inhaling and exhaling, involves the coordinated movement of the chest wall, the lungs, and the muscles that move them. Two muscle groups with important roles in breathing are the diaphragm, located directly below the lungs, and the intercostal muscles, which lie between the ribs. When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity and creating more room for the lungs to expand. When the intercostal muscles contract, the ribs...

Physical Assessment of the Respiratory Tract II: Inspection

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...

Pneumothorax-I

Pneumothorax-I

A pneumothorax is a condition where air builds up in the space between the lung and the chest wall, causing the lung to collapse. This condition arises when air enters the space between the parietal and visceral pleura, disrupting the negative pressure essential for lung inflation. This can lead to a partial or complete collapse of the lung.
Pneumothorax can be even further classified as spontaneous, traumatic, and tension pneumothorax.

Acute Respiratory Failure-III

Acute Respiratory Failure-III

Hypercapnic respiratory failure, also known as Type 2 or ventilatory respiratory failure, is a severe condition characterized by the body's inability to effectively remove carbon dioxide (CO2) from the bloodstream. It leads to an arterial CO2 pressure (PaCO2) exceeding 45 mmHg and a blood pH above 7.35. This situation indicates that the body's ventilatory demand, or the ventilation needed to maintain normal PaCO2 levels, surpasses its supply or the maximum gas flow achievable without causing...

Hyperpnea and Hyperventilation

Hyperpnea and Hyperventilation

Hyperventilation refers to a higher-than-normal rate and depth of breathing, often associated with anxiety attacks. This excessive breathing surpasses the body's need to expel CO2, leading to a condition known as hypocapnia - an unusually low level of carbon dioxide in the blood. Hypocapnia can constrict cerebral blood vessels, reducing blood flow to the brain, which may result in dizziness or fainting. Early signs include tingling and muscle spasms in the hands and face, caused by falling...

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Updated: Jul 14, 2026

Conducting Respiratory Oscillometry in an Outpatient Setting

Conducting Respiratory Oscillometry in an Outpatient Setting

Published on: April 8, 2022

S.O.S! I'm short of breath!

Radha Uppalapati¹, Mary S Landry

¹Department of Obstetrics and Gynecology, John H. Stroger Jr Hospital of Cook County, Chicago, Illinois 60612, USA. uradha@yahoo.com

Obstetrics and Gynecology

|June 2, 2007

Summary

Shortness of breath in pregnant women requires broad diagnosis. This case highlights the importance of a multidisciplinary approach for accurate diagnosis and management of pregnant patients.

Area of Science:

Obstetrics and Gynecology
Pulmonology
Internal Medicine

Background:

Shortness of breath (dyspnea) is a common concern during pregnancy.
Various underlying conditions can cause dyspnea in pregnant individuals.
A comprehensive differential diagnosis is crucial for effective management.

Observation:

A case study of a young, African-American woman in her third trimester of pregnancy.
The patient presented with acute onset of shortness of breath.
A multidisciplinary medical team was involved in the patient's care.

Findings:

A systematic diagnostic workup was performed.
The team successfully reached a definitive diagnosis.
Optimal management strategies were implemented for the patient.

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Last Updated: Jul 14, 2026

Conducting Respiratory Oscillometry in an Outpatient Setting

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Published on: April 8, 2022

Dual Test Gas Pulmonary Diffusing Capacity Measurement During Exercise in Humans Using the Single-Breath Method

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

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

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Implications:

This case underscores the complexity of diagnosing dyspnea in pregnancy.
It emphasizes the value of collaborative, team-based medical approaches.
Further discussion on diagnostic and management strategies for pregnant women is warranted.