Heat and moisture exchanging bacterial filters
نویسندگان
چکیده
منابع مشابه
Bacterial retention properties of heat and moisture exchange filters.
We have examined the properties of six heat and moisture exchange filters (HMEF) to ascertain their resistance to liquid flow and their ability to retain a challenge bacterium, Pseudomonas diminuta, from aqueous and nebulized suspensions. Only one HMEF, the Pall Ultipor was able to withstand a significantly greater pressure of liquid than that found in clinical practice. However, when breached,...
متن کاملA breathing filter exchanging heat and moisture prevents asthma induced by cold air.
In order to devise a protective aid against bronchial obstruction induced by cold air, we have tested a breathing filter with heat and moisture exchanging properties. Nine asthma patients, who all had a history of cold-induced asthma, took part in exercise tests on an ergometer bicycle at a temperature of approximately -10 degrees C, without and with a breathing filter. Without a breathing filt...
متن کاملAir flow resistance of three heat and moisture exchanging filter designs under wet conditions: implications for patient safety.
Heat and moisture exchanging filters (HMEFs) can be blocked by secretions. We have studied HMEF performance under wet conditions to see which particular design features predispose to this complication. Dar Hygrobac-S (composite felt filter and cellulose exchanger), Dar Hygroster (composite pleated ceramic membrane and cellulose exchanger) and Pall BB22-15 (pleated ceramic membrane) HMEFs were t...
متن کاملSafety of combined heat and moisture exchanger filters in long-term mechanical ventilation.
STUDY OBJECTIVE To evaluate the safety of a combined heat and moisture exchanger filter (HMEF) for the conditioning of inspired gas in long-term mechanical ventilation (MV). DESIGN Randomized controlled trial. SETTING Medical ICU in a large teaching hospital. PATIENTS One hundred fifteen consecutive patients who required > or = 48 h of MV. INTERVENTIONS Patients were randomized at intub...
متن کاملBacterial Filters
We have come to divide bacteria and viruses into filterable and nonfilterable, and we have come to think that those organisms, visible or invisible, which are smaller than the pores of our filter are filterable. That size, however, cannot be the sole criterion we have known from the behavior of certain aniline dyes.* Thus Victoria blue, a basic dye, will not pass a Berkefeld filter while Congo ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Anaesthesia
سال: 2007
ISSN: 0003-2409,1365-2044
DOI: 10.1111/j.1365-2044.1988.tb05574.x