Related Experiment Videos
Immotile cilia syndrome in children
Insights
Nasal mucociliary function is impaired in many children with recurrent respiratory issues. Radioisotopic testing can identify reduced mucociliary transport velocity, aiding diagnosis of conditions like sinusitis.
Area of Science:
- Pediatric Otolaryngology
- Respiratory Medicine
- Cell Biology
Background:
- Recurrent respiratory infections, sinusitis, and otitis media are common in children.
- Nasal mucociliary function plays a crucial role in clearing pathogens and maintaining respiratory health.
Purpose of the Study:
- To assess nasal mucociliary function in children with recurrent respiratory infections, sinusitis, and otitis media.
- To correlate mucociliary transport velocity with structural ciliary abnormalities.
Main Methods:
- Radioisotopic method using 99mTc-labelled human serum albumin to measure mucociliary transport velocity.
- Transmission electron microscopy to examine ciliary structure.
Main Results:
- Markedly impaired mucociliary transport (average 1.9 mm/min) was observed in 31 out of 46 children compared to healthy controls (6-9 mm/min).
- Structural ciliary variations were identified, including two cases of immotile cilia syndrome with absent dynein arms.
Conclusions:
- Radioisotopic assessment is recommended for initial evaluation of impaired mucociliary activity in children.
- Electron microscopy is valuable for detailed ciliary analysis when reduced mucociliary function is detected.
Abstract:
Nasal mucociliary function was studied in 46 children suffering from recurrent respiratory infections, sinusitis and otitis media. Mucociliary transport velocity was measured by a radioisotopic method using 99mTc-labelled human serum albumin as a tracer substance. In 31 patients mucociliary transport was markedly impaired, 0-5 mm/min (average 1.9 mm/min), whereas in healthy children it was 6-9 mm/min. Transmission electron microscopic studies of the cilia discovered many structural variations. Two patients, who did not have dextrocardia and who had had respiratory difficulties from birth onwards, had the immotile cilia syndrome, with total absence of dynein arms in the ciliary cross-sections. In the study of recurrent and chronic bronchitis, sinusitis and otitis media in children the radioisotopic method is recommended for initial examination and, if a lowered mucociliary activity is detected on both sides of the nose, a sample of nasal or bronchial mucosa should be taken for electron microscopic studies.