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Development of New Therapeutic Applications Using Microfluidics
Published on: October 1, 2007
Nanotechnology: pediatric applications
Mary C Machado1, Daniel Cheng, Keiko M Tarquinio
1Division of Engineering, Brown University, Providence, Rhode Island 02919, USA.
Insights
Nanotechnology offers a promising solution to prevent ventilator-associated pneumonia (VAP) in children by inhibiting endotracheal tube (ETT) colonization. Nanoparticles and nanoetching reduce biofilm formation, a key factor in this serious infection.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Pediatric Infectious Diseases
Background:
- Ventilator-associated pneumonia (VAP) is a significant clinical challenge in pediatric intensive care.
- VAP is linked to endotracheal tube (ETT) colonization during mechanical ventilation.
- Diagnosis and antibiotic treatment of VAP in children are often complicated by non-specific signs and treatment ineffectiveness.
Purpose of the Study:
- To review the antimicrobial properties of nanoparticles and nanomodified surfaces for ETT applications.
- To evaluate the effectiveness of these nanomaterials in preventing bacterial colonization on ETTs.
Main Methods:
- Review of existing literature on nanoparticle antimicrobial activity (e.g., selenium, iron oxide).
- Examination of nanoetching techniques for modifying ETT surface topography.
- Analysis of studies investigating biofilm formation and bacterial adhesion on ETTs.
Main Results:
- Nanoparticles can penetrate biofilms to reach antibiotic-protected bacteria.
- Nanoetching alters ETT surfaces to impede bacterial adhesion.
- Nanomaterial application shows potential for reducing ETT colonization.
Conclusions:
- Nanomodified coatings on ETTs represent a viable strategy to combat VAP.
- Nanotechnology offers a novel approach to prevent device-related infections in pediatric patients.
- Further research is warranted to optimize nanocoatings for clinical VAP prevention.
Abstract:
Ventilator-associated pneumonia (VAP) is a serious and costly clinical problem affecting pediatrics today. This device-related infection is thought to be directly linked to the colonization of the endotracheal tube (ETT) during long-term mechanical ventilation. Because of unspecific radiographic and clinical signs, VAP is especially difficult to diagnose in the pediatric population. Treatment with antibiotics is often ineffective, and VAP is associated with high morbidity, mortality, and medical costs. The use of nanomodified coatings on ETT may provide an effective strategy to prevent biofilm formation and ETT colonization. Nanoparticles such as selenium and iron oxide have been shown to penetrate into the biofilm reaching the protected cells antibiotics often miss. Moreover, nanoetching techniques can modify the topography of the ETT surface interfering with bacterial adhesion. This review seeks to examine the antimicrobial properties of both nanoparticles and nanomodified surfaces and to characterize their effectiveness at reducing bacterial colonization on ETT.
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