جستجوی مقالات مرتبط با کلیدواژه "کورتیزول بزاق" در نشریات گروه "پزشکی"

Many industries have multiple factors harmful to health, leading to simultaneous exposure of these factors to each other. Noise is one of the most common physical parameters in the work environment. On the other hand, heat is also increasing due to various energy processes in industries. Therefore, this study was conducted with the aim of determining changes in physiological parameters and visual-auditory attention in acute exposure to heat and noise.

In this experimental study, 72 individuals (36 men and 36 women) aged between 23 and 33 years participated according to the inclusion criteria. In total, 12 different test modes were performed (3 temperature levels and 4 noise pressure levels). The test was conducted for each person in 4 steps during a specific day. The duration of exposure to each condition was half an hour, and a half-hour rest was given between each test condition. Saliva samples of each subject were collected before and immediately after exposure to noise and heat. Also, The Integrated Visual and Auditory (IVA) was recorded by the participants simultaneously.

The results of combined exposure to noise and heat on visual and auditory attention showed that only two modes of combined exposure, SPL95+WBGT34 and SPL95+WBGT29, caused a significant increase (P < 0.05) in mental workload and a significant decrease (P < 0.05) in visual and auditory attention. In addition, the results showed that independent exposure to noise at the levels of 85 and 95 dB and exposure to heat at higher temperature levels of 34 and 29 degrees Celsius cause a significant increase (P < 0.05) in salivary cortisol after exposure. The results of the effect of combined exposure to noise and heat on salivary cortisol showed that three experimental modes of combined exposure (SPL85+WBGT34, SPL95+WBGT29, and SPL95+WBGT34) caused a noticeable and significant (P<0.001) increase in salivary cortisol.

Indeed, salivary cortisol can be recommended as a physiological index to evaluate noise and heat exposure. It’s also noteworthy that salivary cortisol is more affected by noise and heat exposure than cognitive performance.

Cortisol is the most important glucocorticoid that increases in stressful situations. The goal of this study was to evaluate the effect of audiovisual distraction (cartoon watching) on salivary cortisol among 5-9 year – old children during dental treatment, in a dental clinic in Tehran. This matched cross over single blind clinical trial study was performed on fifteen 5-9 year – old children. Patients who had at least two identical counterpart teeth with same treatment plan participated in the study. The children were divided into two groups. In one group in first visit, the treatment was performed under normal dental set up without watching cartoon films and in second visit cartoon films was presented during the administration of local anesthetic and treatment, and vise versa. The children were asked to give a total of three Saliva samples in each visit: one prior to dental treatment, one after administration of local anesthetic and one after dental treatment completion. Samples were sent to laboratory and cortisol in saliva was measured using the ECLIA method. Intra group statistical analysis was performed using wilcoxon test and intergroup analysis was performed using Manu witheny. cortisol variation level in visit without audiovisual distraction after local anesthetic administration was 3/3  6/05 and after completion of treatment was 1/62/7, in visit with audiovisual distraction after injection was 2/59/5 and after treatment completion was 0/56/2. There was no statistical significant difference between two groups. Also sex, age, birth rank, the number of family members, the type of treatment have no influence on decreasing salivary cortisol. Audiovisual distraction (cartoon watching) has no significant effect on decreasing salivary cortisol during dental treatment.