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Continuous negative chest-wall pressure therapy for assisting ventilation in older children with progressive
Insights
Continuous negative chest-wall pressure (CNP) effectively improved oxygenation in children with respiratory insufficiency. This non-invasive method avoided intubation and reduced the need for sedatives, improving patient outcomes.
Area of Science:
- Pediatric Pulmonology
- Critical Care Medicine
- Respiratory Physiology
Background:
- Children with diffuse bilateral alveolar disease can develop progressive respiratory insufficiency.
- Severe respiratory compromise often necessitates mechanical ventilation, which carries risks like intubation and sedation.
Purpose of the Study:
- To evaluate the efficacy of continuous negative chest-wall pressure (CNP) as a ventilatory support in pediatric patients with respiratory insufficiency.
- To assess the impact of CNP on arterial oxygenation, respiratory rate, and intrapulmonary shunt.
Main Methods:
- CNP was applied to 14 children (6 months to 14 years) with respiratory insufficiency.
- Key parameters monitored included respiratory rate, arterial oxygen tension (PaO2), arterial carbon dioxide tension (PaCO2), and intrapulmonary shunt.
Main Results:
- Within 6 hours, CNP significantly increased PaO2 (p < 0.005).
- Within 24 hours, CNP allowed for reduced fraction of inspired oxygen (FIO2) (p < 0.001) and respiratory rate (p < 0.01).
- CNP therapy led to a decrease in intrapulmonary shunt and 10 of 14 patients survived.
Conclusions:
- CNP is an effective non-invasive therapy for improving arterial oxygenation in spontaneously breathing children with respiratory insufficiency.
- CNP avoids endotracheal intubation, muscle relaxants, and sedatives, minimizing risks such as pulmonary oxygen toxicity.
Abstract:
Continuous negative chest-wall pressure (CNP) was used to assist ventilation in 14 children, 6 months to 14 years of age, who had progressive respiratory insufficiency caused by diffuse bilateral alveolar disease. Before the start of CNP therapy, each child had a respiratory rate greater than 50/min, arterial oxygen tension (PaO2) less than 70 mmHg (FIO2 greater than or equal to 50%), and arterial carbon dioxide tension (PaCO2) less than 45 mmHg. The mean intrapulmonary right-to-left shunt was 28.7 +/- 3.8%. Within 6 hours after therapy was started, PaO2 increased from 55.4 +/- 15.9 to 81.6 +/-17.7 mmHg (p less than 0.005). This improvement was sustained and within 24 hours permitted a decrease in fractional concentration inspired oxygen (FIO2) from 51.8 +/- 6.2 to 41.0 +/- 8.4% (p less than 0.001) and in respiratory rate from 78.1 +/-23.0 to 56.4 +/- 21.3 (p less than 0.01). There was a concomitant decrease in intrapulmonary right-to-left shunt. Four of the 14 patients developed pneumothorax that was successfully decompressed. Ten patients survived. These observations establish CNP therapy as an effective means of improving arterial oxygenation in spontaneously breathing older children. Of added significance, this mode of therapy eliminates the need for endotracheal intubation and prolonged use of muscle relaxants and sedatives. It also minimizes exposure to high FIO2, thereby minimizing the hazards of pulmonary oxygen toxicity.