HUBUNGAN ANTARA BESARNYA PAPARAN KUAT ARUS LISTRIK BOLAK-BALIK DI DALAM AIR TERHADAP GAMBARAN KERUSAKAN OTOT INTERKOSTALIS TIKUS WISTAR

Abstract

Background : Human body is very sensitive to electricity. Electrical exposure without any protector can cause injury, even death. Almost all of the death caused by electricity which happened in waters, neither electrical marks nor burns resulted in the macroscopic finding. The passage of a current across the chest may lead to respiratory paralysis from spasm of the intercostals muscles. Electrothermal injury of musculature may manifest as hyperaemia, rupture, and tissue necrosis. The primary determinant of damage caused by direct effects of electricity is the amount of current flowing through the body (amperage). This research had a purpose to know the correlation between the low tension alternating current electrical exposure with different amperage to intercostals muscles histopathology characteristic of Wistar rats. Method : An experimental study using control group with post test only control group design to Wistar rats which was given an alternating current electrical exposure . The samples which consist of 15 Wistar rats were divided into 3 groups. They were one control group, received standard diet and two treatment group, which was given an alternating current electrical exposure with 50 mA for the first treatment group (P1), and 100 mA for the second treatment group (P2). This electrical exposure was given for 10 seconds. After observating, intercostals muscles were immediately taken from the rats and made a preparat. Data were analyzed using Kruskal-Wallis method for between subject data. The statistical analysis was done with SPSS program for windows 15.00. The difference is significant when p<0,05. Result : The results of the study shows that third group had the highest mean of hyperaemia as 0,94 + 0,38471 ; the first group had mean of hyperaemia as 0 ; the second group had mean of hyperaemia as 0,34 + 0,20736. The Mann-Whitney test showed that there was a significant difference (p<0 ,05) among all of groups and hyperaemia finding. The significant difference between first group and second group is p= 0,018 , first group and third group is p= 0,005 , and second group and third group is p= 0,036. Conclusion : The alternating current electrical exposure with 50 mA dan 100 mA for 10 seconds caused significant intercostals muscles damage of Wistar rats, which manifest as hyperaemia. The higher the amperage was given would more increase the hyperaemia of muscle level. Keyword :Amperage, Intercostals muscles,Hiperaemi.