Effect of Music Over the Tolerance to Colonoscopy.

The Effect of Music Over the Tolerance to Colonoscopy ¿Does it Reduce the Discomfort, the Anxiety and the Need of Sedation? Multicentric Randomized Controlled Trial.

This study will evaluate the efficacy of music (a very well selected list of songs)on improving the tolerance to the colonoscopy. The patients will be randomly assigned to receive music or not. The authors hypothesis is that music is able to improve the tolerance to colonoscopy evaluated as a reduction on the level of anxiety, on the intensity of pain experimented during the procedure and a reduction of the administered dose of midazolam during the colonoscopy.

To select the music that will be administered on this trial we will performed as the first part of the study, a two fase pilot study. In the first part, five song belonging to different musical styles (Rock, Bosa Nova, Classical Music, Popular chilean music and New age) will be heard by 40 persons and the main emotion produced by every song will be registered (chosen among a previously defined list of emotions) and then rated using a visual analog scale. Thus, we will be able to select the musical style that with more frequency produce "tranquility and/or peace". Once this musical style will be selected we generate a set of songs belonging to this style. This set of songs will be validated using again a similar methodology in the second part of the pilot study to be sure that is able to produce the same emotion that the song previously evaluated. The validated set of songs will be the music that will be administered to the patients participating on a multicentric randomized controlled trial where the effect of the selected music over the tolerance to colonoscopy will be evaluated measuring the level of anxiety, the administered dose of midazolam and the intensity of pain experimented during the procedure among another variables on the experimental and the control groups, including 150 patients on each arm.

Inclusion Criteria:

• Adults (over 18 years)
• Diagnostic colonoscopy
• Signed informed consent

Exclusion Criteria:

• Hypoacusia
• Significant cognitive impairment
• Hypotension
• Signs of digestive haemorrhage (other than a small amount of rectorrhagia)
• More than moderate intensity of pain before the colonoscopy.
• Previous colorectal surgery
• allergy to midazolam or pethidine