Institute for Medical Research and Occupational Health
Abstract
By means of the photoplethysmographic method including the cold test, skin blood flow was recorded m the fingers of 42 chain-saw operators and 36 control subjects. The essential difference between the groups pertained to the height of the pulse wave amplitude after the cold test and to the fall in amplitude expressed as a percentage of its initial value. A limit of a 90% fall in amplitude after the cold test is proposed as s criterion for differentiating a normal from a pathological vasospastic reaction. A fall in amplitude is correlated with the intensity of subjective disorders, Le. the attack of vibration-induced white fingers. The obstructive form and loss of amplitude of the pulse wave form are accepted as pathological.Mjerenje krvnog protoka u koži prstiju fotopletizmografskom metodom uz primjenu termalnog testa provedeno je kod 42 sjekača motornom pilom i 36 muškaraca kontrolne skupine. Bitna razlika između skupina nađena je u visini amplitude krivulje pulsnog vala poslije testa hladnoćom te u padu amplitude izražene kao postotak njezine početne vrijednosti. Predložena je granica od 90% rada amplitude nakon testa hladnoćom kao kriterij za razlikovanje normalne od patološke vazospastičke reakcije. Pad amplitude je povezan s intenzitetom subjektivnih smetnji, tj. pojavom »bijelih prstiju«. Kao patološki prihvaćeni su opstruktivni oblik i gubitak amplitude krivulje pulsnog val
