Respiratory system assessment of marine spray painting workers

ABSTRACT

Workers at the Marine Spray Painting Workshop [MSPW] are exposed to respiratory hazards durig ship surface preparation and spray painting. To identify hazards at the Marine Spray Painting Workshop [MSPW] and assess the impact of these hazards on the respiratory system of Marine Spray Painters [MSPs]. The study included 80 workers, of these were 40 MSPs from the Alexandria Shipyard Company. The rest were control workers, not exposed to respiratory hazards in their work environment. All MSPs and unexposed workers were subjected to an interviewing schedule; to collect data on personal characteristics, occupational, and medical history. The Medical Research Council [MRC] questionnaire was used, it included questions on respiratory symptoms, and diseases. All workers underwent a general clinical examination, a local chest examination, pulmonary function tests, and lung imaging by conventional chest radiographs [CCR]. The present study demonstrated that breathlessness grade IV, wheeze, and bronchial asthma, were significantly more encountered among MSPs compared with unexposed workers. On assessing lung functions, mean percent predicted values of lung function indices [LFI] reflecting large and small-airway functions were lowered among MSPs compared with unexposed workers, but the lowering was not statistically significant. Furthermore, it was found that 47.5% of MSPs had no radiological abnormalities [0/0 ILO profusion grade], while 52.5% of MSPs were either with suspicious radiological abnormalities of [0/1 or 1/0 ILO profusion, glade] [10.00%] or with definite radiological abnormalities whose ILO profusion grade was of [2/1, 2/2, or 2/3 ILO profusion grade] [10.00%, 17.5%, or 15.0% respectively]. A comparison between silicotic and non-silicotic MSPs was conducted, where no significant differences were found between them regarding respiratory symptoms, diseases, and spirometric measurements, thus, the significant increase in bronchial asiluna among MSPs in the present study can be attributed to exposure to HDI during spray painting. The study revealed a significant positive correlation between grade of profusion and age, duration of exposure and breathlessness, especially those with profusion grade >/= 1/1, but no significant correlations between the grade of profusion and mean values of spirometric measurements were recorded. A potential respiratory health hazard exists at the [MSPW] in Alexandria Shipyard Company and the level of protection for workers should be increased