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Gewählte Publikation:

Reiterer, F; Abbasi, S; Bhutani, VK.
Influence of head-neck posture on airflow and pulmonary mechanics in preterm neonates.
PEDIAT PULM. 1994; 17(3): 149-154.
Web of Science PubMed

 

Autor/innen der Med Uni Graz:
Reiterer Friedrich
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Abstract:
The influence of head-neck posture (neutral, 15 degrees, 30 degrees, and 45 degrees extension and flexion) on airflow and pulmonary mechanics was evaluated in 10 spontaneously breathing healthy preterm neonates (mean +/- SD; birth weight, 1.32 +/- 0.23 kg; gestational age, 29.4 +/- 2.4 weeks; study age, 36.6 +/- 1.6 weeks) who had had respiratory distress syndrome. Head-neck postures were quantified using specially constructed wooden wedges. Airflow was measured by a pneumotachometer via face mask. Lung compliance (CL) and resistance (RL) were measured using an esophageal balloon. Airflow interruption was designated as mild (10-40%), moderate (40-80%), and severe (> 80-100%) decrease of airflow. At neutral head-neck posture, 42.8 +/- 7.5% SEM of breaths had airflow interruption (71.4% mild, 19.9% moderate, 8.7% severe). There was no significant change with 15 degrees and 30 degrees head-neck flexion and extension. However, at 45 degrees flexion the overall incidence of airflow interruption (77.3 +/- 4.8%, P < 0.05) and RL (86.6 +/- 6.7 vs. 64.2 +/- 3.9 cmH2O/L/s, mean +/- SEM; P < 0.05) significantly increased. Extension to 45 degrees caused severe airflow interruption and increased RL in some infants, but no statistically significant change for the whole group. The incidence of severe airflow interruption significantly increased (P < 0.05) from 8.7% at neutral head-neck posture to 26.3% at hyperflexion (45 degrees). No changes in CL were observed. We conclude that minor (15-30 degrees) deviations from neutral neck posture are insignificant, whereas hyperflexion, and in some infants, hyperextension, can significantly affect airflow and pulmonary mechanics.
Find related publications in this database (using NLM MeSH Indexing)
Airway Resistance -
Head -
Humans -
Infant, Low Birth Weight - physiology
Infant, Newborn - physiology
Infant, Premature - physiology
Lung Compliance - physiology
Neck - physiology
Posture - physiology
Pulmonary Ventilation - physiology
Respiratory Function Tests - physiology
Respiratory Mechanics - physiology

Find related publications in this database (Keywords)
Air-Flow Interruption
Incidence of
Lung Compliance
Lung Resistance
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