The effect of technique on histology of arthroscopic partial meniscectomy with electrosurgery

Abstract

Fifty-one patients had arthroscopic partial meniscectomies with electrosurgery between 1982 and 1985. Two patients who had undergone prior meniscectomies with electrosurgery had biopsies of the old excision site at repeat arthroscopy, necessitated by new injuries. Three different combinations of electrocautery tips and either a standard electrocautery generator or a new electrocautery generator specifically designed for arthroscopic electrosurgery were used in different combinations. Depth of damage as defined by the Trichrome stain was measured by a micrometer. A rating summary of the quality of resection technique was also performed. Overall, the newly developed electrocautery generator and the newly developed electrocautery tips were not beneficial in reducing the depth of damage. The average depth of damage was .29 mm. Forty-seven percent of patients showed no histologic evidence of damage from the electrosurgical resection. The two individuals with repeat biopsies showed normal histology. Arthroscopic partial meniscectomy with electrosurgery causes a very thin layer of tissue damage. This appears to resolve with time. Recently developed instruments specifically designed for arthroscopic electrosurgery do not appear to decrease the depth of damage.