Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Hartung, JC; Schmölzer, G; Schmalisch, G; Roehr, CC.
Repeated thermo-sterilisation further affects the reliability of positive end-expiratory pressure valves.
J Paediatr Child Health. 2013; 49(9):741-745
Doi: 10.1111/jpc.12258
Web of Science
PubMed
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- Co-Autor*innen der Med Uni Graz
- Schmölzer Georg
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- Abstract:
- Aim Positive end-expiratory pressure (PEEP) valves are used together with self-inflating bags (SIB) to provide a preset PEEP during manual ventilation. It has recently been shown that these valves deliver highly variable levels of PEEP. We hypothesised that material fatigue due to repeated thermo-sterilisation (TS) may contribute to varying reliability of PEEP valves. Methods In a laboratory study 10 new PEEP valves were tested before and after 10, 20 and 30 cycles of routine TS (7min at 134 degrees C) by using a neonatal lung model (compliance 0.2mL/kPa). Settings were positive inflation pressure = 20 and 40cmH(2)O, PEEP = 5 and 10cmH(2)O, respiratory rate = 40 and 60/min, flow = 8l/min. PEEP was recorded using a respiratory function monitor. Results Before TS, a mean (standard deviation) PEEP of 4.0 (0.9) and 7.7 (1.0)cmH(2)O was delivered by the 10 valves when the PEEP was set to 5 and 10cmH(2)O, respectively. One new valve only delivered 2.0 (0.0) and 5.0 (0.0)cmH(2)O when the PEEP was adjusted to 5 and 10cmH(2)O, respectively. Four of the 10 investigated valves showed significant variations in PEEP (coefficient of variation >10%) throughout the autoclaving process. One valve completely lost its function after the 20th TS. Common defects were tears in the softer materials or displacement of the rubber seal. Six of the 10 valves continued to provide PEEP in spite of repeated TS. Conclusion The reliability of PEEP valves is affected by repeated TS. Multi-use PEEP valves should be tested for reliable PEEP provision following TS.
- Find related publications in this database (using NLM MeSH Indexing)
- Equipment Design -
- Equipment Failure -
- Humans -
- Infant, Newborn -
- Models, Anatomic -
- Positive-Pressure Respiration - instrumentation
- Reproducibility of Results -
- Sterilization - methods
- Find related publications in this database (Keywords)
- airway
- neonate
- PEEP
- resuscitation
- valve