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METHYLENE BLUE INJECTION REDUCES PAIN AFTER LATERAL ANAL SPHINCTERTOMY
Author(s) -
SeowChoen F.,
Tan K. Y.
Publication year - 2007
Publication title -
anz journal of surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.426
H-Index - 70
eISSN - 1445-2197
pISSN - 1445-1433
DOI - 10.1111/j.1445-2197.2007.04116_16.x
Subject(s) - medicine , methylene blue , visual analogue scale , surgery , anesthesia , intradermal injection , local anesthesia , biochemistry , chemistry , photocatalysis , immunology , catalysis
Intradermal methylene blue has been used successfully in pruritus ani. The mechanism is likely the destruction of dermal nerve endings. We report a new method in achieving postoperative pain relief using intradermal methylene blue injection to the perianal region after lateral anal sphincterotomy. Methods Consecutive patients undergoing lateral anal sphincterotomy between July 2004 and January 2006 were studied prospectively. All were performed under local anesthesia. Four ml 1% methylene blue and 16 ml 1% lignocaine was injected into the perianal skin and intersphincteric space. Patients were asked to fill in a pain chart with a visual analog scale of 0 to 10. Results There were 24 patients studied during this period. The median pain scores were under 2.5 for the first 4 days and were 0 from the 5th postoperative day. Nineteen out of 24 wound have healed by 2 weeks post sphincterotomy. There were no perianal complications. Conclusion Intradermal injection of methylene blue together with local anesthetic gives good post‐operative pain control with minimal complications.