Tobacco Documents Online

TC126,/W06 N46 RESPONSE TO REPORTS FROM US TESTING, AND1FRESENIUS LABORATORIES Both of these reports are addressed to the allegation that smokers may consciously or unconsciously abuse the ACTRON fi'lter by occluding some or all of the channels either by excessive pressure by the lips or by blocking the end of the channels withilips (lip drape) or tongue. Both rely heavily on an a~pparatus developed by Philip Morris, call'led a Puff Parameter Analyser (PPA), which measures the dilutiion,ratio. In a critique prepared,by Brown and Williamson (N47), it is demonstrated that the PPA is designed to subvert only the ACTRON ventilation system, thereby introducing anianti-BARCLAY bias at the outset. The design is such as to force the lip:occlusion, alleged to occur routinely. A lietter (N48) from Dr Fine of the University of Chicagw, underlines in detail the way in which this occlusion is forced. A study of insertion dlepth with and without the PPA performed by Dr W Schulz shows quite clearly that the P'PA forces aishort insertion depth which will inevitably lead to occlusion of channel ventilated cigarettes. (N49) Inian essay "pitfalls encountered in the sensory analysis of smoking behaviour"', Dr Koster of the University of Utrecht (N50) emphasises the importanceof maintaining normality. Inre-lation to thePPAspecifically, he notes that it does not allow normali smoking andl discusses the reservations one must keep in mind when evaluating data derived using this apparatus. A simillar view was expressed by Dr Melmut Wakehami of the Phillip, Morris Research Centre when he wrote "In laboratories we often do simplified experiments under arbitrary and artificial conditions because it is easier to doithings that way. We forget that these conditions may be quite unlike those experienced by human smokers, each of whom is enjoying his pipe or, cigaret in dlifferent way from his felllow smokers°• (N51).