Evaluating the effects of inhalational and intravenous anesthesia on hemodynamic variablesand recovery time in direct laryngoscopy

Direct laryngoscopy and biopsy are important procedures in otorhynolaryngology .There would be severe consequences due to the extensive manipulations during these procedures. Ideal condition for this type of surgery requires adequate depth of anesthesia to prevent hemodynamic changes and short-term recovery. The effects of inhaled and intravenous anesthesia (TIVA) on the hemodynamic changes and recovery time, is investigated in this study.
sixty four patients entered the study and divided into two groups of inhaled and intravenous (TIVA) anesthesia, thirty two patients each. Heart rate and blood pressure were recorded before induction and in defined intervals in both groups. At the end of surgery, recovery time recorded in both groups.
Average heart rate in 1st, 3rd, 5th, 10th, 15th, 20th and 30th minute post induction was 77.87, 74.38, 72.23, 68.83, 68.92, 69.03 and 69.55 beats/min in TIVA group respectively and 94.73, 93.26, 91.56, 86.97, 87.83, 87.12 and 87.75 beats/min in inhaled anesthesia group respectively, which was statistically meaningful. Average Systolic BP in 1st, 3rd, 5th, 10th, 15th, 20th and 30th minute post induction was 118.83, 113.17, 108.33, 105.50, 102, 97 and 101.33 mmHg in TIVA group respectively and 127.50, 133.83, 131, 135.12, 127.83, 123.83 and 120.83 in inhaled anesthesia group respectively, which was statistically meaningful. Average recovery time to respond to verbal stimulation was 12.13 minute and 22.43 minute in TIVA and inhalation group respectively which was statistically meaningful.
Intravenous anesthesia is a wise choice for direct laryngoscopy and biopsy surgery, since exerts better control on hemodynamics and causes a short-term recovery.