161941. |
|
|
161942. |
- Ljungqvist, Bengt, et al.
(författare)
-
Chapter 35 : Cleanroom clothing systems - Some calculations
- 2006
-
Ingår i: 37th R3-Nordic Contamination Control Symposium. - ESPOO : TECHNICAL RESEARCH CENTRE FINLAND. - 9513863034 ; , s. 197-206
-
Konferensbidrag (refereegranskat)abstract
- With the result from the book "Cleanroom Clothing Systems, People as a contamination source" (1), some calculations are given, describing predicted contamination levels in cleanrooms with turbulent mixing air and cleanrooms with vertical unidirectional air flow when people are dressed in modern cleanroom clothing systems which have been used and washed several times.
|
|
161943. |
- Ljungqvist, Bengt, et al.
(författare)
-
Chapter 58 : Dispersion of airborne contaminants - Basics in R3 technology
- 2006
-
Ingår i: 37th R3-Nordic Contamination Control Symposium. - ESPOO : TECHNICAL RESEARCH CENTRE FINLAND. - 9513863034 ; , s. 417-419
-
Konferensbidrag (refereegranskat)abstract
- In cleanrooms the main source of biocontamination is people. The concentration of airborne biocontamination depends upon the number of people present in a cleanroom, their level of activity, and the clothing systems used. There are several methods of measuring the airborne biocontamination and many published reports show that the results - as number of colony forming units per cubic meter (CFU/m3) - depend on the equipment used. The difference in results between microbiological air samplers often depend upon physical parameters of the samplers. These parameters, together with d50 that is the aerodynamic particle diameter where 50% of the particles are collected and 50% are not collected are discussed. In order to evaluate the collection efficiency of impaction air samplers, a simplified mathematical model will be presented and examples given.
|
|
161944. |
|
|
161945. |
|
|
161946. |
|
|
161947. |
|
|
161948. |
- Ljungqvist, Bengt, et al.
(författare)
-
Clothing systems used in operating rooms - A question of patient safety
- 2010
-
Ingår i: 41st R³-Nordic Symposium. - : Valtion Teknillinen Tutkimuskeskus. - 9789513875954 ; , s. 142-147
-
Konferensbidrag (refereegranskat)abstract
- Clothing systems used in operating rooms are compared to clothing systems used in food industry and in pharmaceutical manufacturing. For all these industries the control of the concentration of airborne bacteria-carrying particles are of vital importance. The emission of large particles with regard to clothing system quality is commented. Results from the study can be used to calculate expected concentrations of airborne aerobic colony forming units in the operation room when clothing system and number of people in the room are known. The study shows that the commonly used protective clothing systems need to be upgraded in operation rooms where patients, sensitive to infections undergo operations.
|
|
161949. |
- Ljungqvist, Bengt, et al.
(författare)
-
Contamination risks due to door openings in operating rooms
- 2010
-
Ingår i: 41st R3-Nordic Symposium. - 9789513875954 ; , s. 148-160
-
Konferensbidrag (refereegranskat)abstract
- In view of the ongoing discussions concerning the need for guidelines and contamination control in operating rooms, dispersion of airborne contaminants through door openings is discussed in this paper. Some mathematical models are described. The increase of the concentration of viable particles is predicted. The results show the importance of air cleanliness outside the operating room door in connecting areas/rooms when operations susceptible to infections are performed.
|
|
161950. |
|
|