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Pulmonary Cycle: Exhalation01:17

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In terms of human respiration, the act of expelling air, known as exhalation (or expiration), operates on the principle of pressure gradients. During expiration, the pressure within the lungs exceeds that of the surrounding atmosphere. Under normal conditions, quiet breathing involves passive exhalation and is free of muscular contractions. This is because the exhalation process is driven by the natural elastic recoil of the lungs and chest wall, both of which have an inherent tendency to...
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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.
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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 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.
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In assessing respiratory abnormalities, palpation and auscultation are critical tools for detecting and interpreting various pathophysiological changes. These techniques provide insight into underlying disorders by evaluating tactile sensations and sounds produced by the respiratory system.
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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.
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Related Experiment Video

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Electrophysiology on Isolated Brainstem-spinal Cord Preparations from Newborn Rodents Allows Neural Respiratory Network Output Recording
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Persistent grunting respirations after birth.

Gustavo M Rocha1, Filipa S Flor-De-Lima2, Hercília A Guimaraes2,3

  • 1Unit of Neonatal Intensive Care, Department of Pediatrics, Hospital de São João, Porto, Portugal - gusrocha@sapo.pt.

Minerva Pediatrica
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PubMed
Summary
This summary is machine-generated.

Persistent grunting in newborns after birth is common, but prolonged grunting lasting over two hours warrants careful observation. While often benign, understanding associated factors and causes is crucial for neonatal care.

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Area of Science:

  • Neonatal Medicine
  • Pediatric Pulmonology
  • Clinical Pediatrics

Background:

  • Grunting respirations are a common, non-specific sign in newborns during the initial hours of life.
  • The clinical significance of grunting persisting beyond two hours in term and near-term infants requires further assessment.

Purpose of the Study:

  • To evaluate the clinical significance of prolonged grunting (lasting over two hours) in term and near-term newborns.
  • To identify factors associated with prolonged grunting and its underlying causes in neonates.

Main Methods:

  • A five-year retrospective study was conducted on newborns gestational age ≥35 weeks admitted for grunting to a level III Neonatal Intensive Care Unit (NICU).
  • Data from 151 newborns with prolonged grunting were compared to 302 control infants.
  • Analysis included maternal age, pregnancy complications, gestational age, gender, resuscitation status, respiratory signs, and therapies.

Main Results:

  • Prolonged grunting occurred in 1.2% of newborns; associated factors included higher maternal age, pregnancy complications, lower gestational age, male gender, and need for resuscitation.
  • Poor adaptation to extrauterine life (48.3%) and transient tachypnea of the newborn (26.5%) were the most frequent causes of grunting.
  • Other causes included respiratory distress syndrome (RDS), infection, birth trauma, and congenital anomalies; complications were rare, and no mortality was observed.

Conclusions:

  • Persistent grunting respirations in term and near-term newborns generally follow a benign course.
  • However, careful observation and appropriate treatment are recommended for all affected infants due to potential underlying conditions.
  • Early identification of risk factors and causes can aid in managing neonatal respiratory distress.