An Observational study comparing the effect of Sphenopalatine Artery Block on bleeding in Endoscopic Sinus Surgery

Nigil Sreedharan, (2017) An Observational study comparing the effect of Sphenopalatine Artery Block on bleeding in Endoscopic Sinus Surgery. Masters thesis, Stanley Medical College, Chennai.


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This is a cross sectional observational study done in a tertiary care centre. 55 patients coming to the ENT department of Government Stanley Medical College from 2015 – 2016 were included in this study. Of these there were 28 males and 27 females. All the patients met the inclusion criteria decided upon at the beginning the study. Ethical committee clearance for the study was obtained and written informed consent for the study was taken from each patient. All patients had bilateral nasal sinus disease and endoscopic sinus surgery was performed on both sides. The procedure done on both sides were the same in each case. 20 minutes prior to surgery one side was chosen randomly and sphenopalatine artery block was administered via the greater palatine canal approach. A mixture of lignocaine (2%) and adrenaline (1:80000) was used for infiltration. The surgery was done in an alternating fashion where the surgeon would operate for 15 minutes on one side and then move onto the other side. The field was graded for bleeding at 30 minute intervals. Wormald Grading System was used. The results were tabulated and the Wilcoxon Signed Rank Test was done at each time interval to see if there was a statistically significant difference in the grades of on both sides at each time interval. It was found that for each time interval up to 120 minutes there was a significant decrease in the bleeding on the blocked side. However after 120 minutes the bleeding on both sides appeared to be same. In conclusion sphenopalatine artery block given prior to surgery will be effective in reducing bleeding in FESS for the first 2 hours after which the effect of the block wears away.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Sphenopalatine Artery Block, bleeding, Endoscopic Sinus Surgery, Observational study.
Subjects: MEDICAL > Otolaryngology
Depositing User: Devi S
Date Deposited: 15 Mar 2020 16:25
Last Modified: 16 Mar 2020 02:04

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