The Comparison between effects of the injection rate in infiltration technique on pain, anxiety and vital signs of the patients using ICT injection

Backgroud & Aim: This study was conducted to determine the effects of the injection rate in infiltration technique on pain, anxiety and vital signs of the patients using ICT injection device amongst the patients referring to the periodontics and oral and maxillofacial department of Azad University of Tehran in 2016. The method of the current study was randomized single blind-split mouth clinical trial. 30 patients need to be injected bilaterally on maxilla in two treatment sessions. Next, each sample was selected randomly to be injected at two paces (25 seconds or 120 seconds) Then the pain measurements were performed in Visual analogue scale (VAS), and vital signs (breathing patterns and heart rate) before, right after and 5 minutes after the injection with anxiety measurements (FAS) and digital sets of Buerer BM60 by a person unaware of the groupings. After data collection, Kolmogorov-Smirnov and t-squared tests were used to analyze the data. The pain levels were significantly different between the pace of 120 s and 25 s (p= 0.0006) as the lower pace resulted in less pain comparing to faster injections.
The hypotension was significantly different as well in 120 s and 25 s (p=0.029) Injection with slow velocity resulted in a change in the lower systolic pressure immediately after injection (128.87 ± 14.36) compared with the time before injection for the patient (130.53 ± 13.38), compared to rapid injection immediately after injection (124.97 ± 14.09) compared to the time before injection for the patient (128.00 ± 10.92). There were no significant differences in other variables (p=0.1)

In slower injection rate the pain is less than faster injection. Also slow-injection, as compared to rapid-injection, cause to less changes in systolic blood pressure immediately after injection. The injection rate did not affect the patient's heart rate, diastolic pressure, and anxiety.