• Anesthesia and analgesia · Mar 2008

    Randomized Controlled Trial

    The role of a flash of light for attenuation of venous cannulation pain: a prospective, randomized, placebo-controlled study.

    • Anil Agarwal, Ghanshyam Yadav, Devendra Gupta, Manish Tandon, Prabhat Kumar Singh, and Uttam Singh.
    • Department of Anaesthesiology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow 226014, India. aagarwal@sgpgi.ac.in
    • Anesth. Analg. 2008 Mar 1;106(3):814-6, table of contents.

    BackgroundVenous cannulation is often performed without any analgesia, even though pain experienced during this procedure is at times very distressing. Various pharmacological and nonpharmacological measures have been tried with variable results to minimize venous cannulation pain. We designed the present study to evaluate the efficacy of a flash of light on attenuating venous cannulation pain.MethodsNinety adults (15-60 yr), ASA physical status I and II, of either sex, undergoing elective laparoscopic cholecystectomy, were included in this prospective and randomized study. Patients were divided into three groups of 30 each. Group I (control); Group II (distraction): photographed without a flash of light; and Group III (flash): photographed with a flash of light just before venous cannulation of a vein on the dorsum of the nondominant hand. Immediately after the photograph, venous cannulation was performed using an 18-gauge cannula.ResultsTwo patients from each group could not be cannulated on their first attempt and were therefore dropped from subsequent analysis. The incidence of venous cannulation pain in the flash group was lower, i.e., 50% (14 of 28) when compared to 100% (28 of 28) observed in the other two study groups (P < 0.01). Severity of venous cannulation pain as assessed by the Visual Analog Scale scores (between 0 and 100; where 0 = no pain and 100 = worst imaginable pain) presented as median (interquartile range) were reduced in the flash [10(20)] and distraction [20(10)] groups compared with the control group [40(20)] (P < 0.01). The severity of venous cannulation pain was also reduced in the flash group compared with the distraction group (P < 0.01).ConclusionWe conclude that a flash of light before venous cannulation is a safe, effective, and easy-to-use method for minimizing venous cannulation pain.

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