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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 Volumes and Capacities I01:26

Respiratory Volumes and Capacities I

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...
Acute Respiratory Failure-IV01:23

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...
Hyperpnea and Hyperventilation01:25

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...
Acute Respiratory Failure-III01:30

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...
Acute Respiratory Failure-II01:21

Acute Respiratory Failure-II

Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:

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Related Experiment Video

Updated: Jun 22, 2026

A Protocol for Comprehensive Assessment of Bulbar Dysfunction in Amyotrophic Lateral Sclerosis (ALS)
12:43

A Protocol for Comprehensive Assessment of Bulbar Dysfunction in Amyotrophic Lateral Sclerosis (ALS)

Published on: February 21, 2011

Short-duration accelerated breathing challenges affect phonation.

Mahalakshmi Sivasankar1, Elizabeth Erickson

  • 1Department of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, Indiana 47907, USA. msivasankar@purdue.edu

The Laryngoscope
|June 13, 2009
PubMed
Summary
This summary is machine-generated.

Accelerated breathing, even for short periods, can negatively impact voice production by increasing phonation threshold pressures. This effect was observed regardless of breathing route, humidity, or smoking status.

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Area of Science:

  • Laryngology
  • Respiratory Physiology
  • Voice Science

Background:

  • Adequate airway humidification is crucial for healthy vocal fold function and phonation.
  • Factors like increased breathing rate and oral breathing reduce inhaled air's water content, potentially leading to airway dehydration.
  • Accelerated breathing challenges are hypothesized to negatively affect airway function and phonation.

Purpose of the Study:

  • To investigate the detrimental effects of accelerated oral breathing challenges on phonation.
  • To determine if smokers, a group at higher risk for voice problems, experience greater adverse phonatory effects compared to non-smokers after accelerated breathing challenges.

Main Methods:

  • A prospective, between-subjects, repeated-measures study design was employed.
  • Female smokers (n=12) and non-smoking controls (n=12) participated in experiments across varying ambient humidity levels.
  • Phonation threshold pressures (PTP) and respiratory measures were recorded before and after habitual and accelerated breathing challenges.

Main Results:

  • Short-term accelerated breathing challenges significantly increased PTP, indicating a negative impact on phonation.
  • The observed increase in PTP was transient and not significantly influenced by breathing route, ambient humidity, or smoking status.
  • Respiratory measures remained unaffected by breathing route, ambient humidity, or smoking status.

Conclusions:

  • Even brief periods of accelerated breathing can adversely affect phonation.
  • These findings suggest that activities involving accelerated breathing, such as exercise, may impact voice production.