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  • Title: Preemptive use of small dose fentanyl suppresses fentanyl induced cough.
    Author: Shrestha SK, Bhattarai B, Shah RS.
    Journal: Kathmandu Univ Med J (KUMJ); 2012; 10(40):16-9. PubMed ID: 23575046.
    Abstract:
    BACKGROUND: Fentanyl, a synthetic opioid, is a popular choice amongst anaesthesiologists in the operating room. Pre induction intravenous fentanyl bolus is associated with coughing in 28-65% of patients. Fentanyl induced cough is not always benign and can be remarkably troublesome at the most critical moment of anaesthesia when airway reflex is lost. OBJECTIVES: To study the effect of pre emptive use of minimal dose fentanyl through the peripheral venous cannulae on the incidence of cough by a larger bolus of intravenous fentanyl. METHODS: One hundred and fifty patients aged 18-75 years undergoing elective surgical procedures were randomized into three groups of 50 each. The first group received 0.5 ml saline 0.9% intravenously one minute prior to the administration of fentanyl 150 μg (3 ml); the second group received pre emptive fentanyl 25 μg (0.5 ml) prior to the administration of fentanyl 125 μg (2.5 ml); and the third group received preemptive fentanyl 25 μg (0.5 ml), followed by the administration of fentanyl 150 μg (3 ml). Based on the number of coughs observed, cough severity was graded as mild (1-2), moderate (3-5), or severe (>5). RESULTS: The incidence of fentanyl induced cough was significantly lower in both pre emptive group 4 (8%) for 125 μg fentanyl and 7 (14%) for 150 μg than in the saline group 15 (30%). CONCLUSION: Pre-emptive use of minimal dose fentanyl 25 μg administered one minute before a larger bolus dose of fentanyl (125 or 150 μg) can effectively suppress cough.
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