{'fraction_non_alphanumeric': 0.04052863436123348, 'fraction_numerical': 0.048458149779735685, 'mean_word_length': 4.855670103092783, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
The healing of CO2 laser wounds of the larynx

The CO 2 laser is used in laryngeal surgery for the excision or vaporization of a wide variety of conditions including singers' nodules, polyps, hyperkeratosis and carcinoma in situ. Following this type of procedure, the patient experiences less pain and swelling than with conventional techniques, and the wounds heal with less contraction and scarring (Strong etal. 1973; Healy etal. 1978; Vaughan, 1978). A similar sequence of events occurs in the mouth following laser irradiation of oral mucosa (Strong et al. 1979a, b; Tuffin and Carruth, 1980; Carruth, 1982). Several biological studies have been carried out in experimental animals to examine the effect of the CO 2 laser on tissues and their subsequent healing. These investigations have been concerned principally with incisions and focussed spot impacts, mainly on the skin (Hall, 1971; Hall etal. 1971a,b;Mesterefa/. 1971;Mihashiefa/. 1976). Some studies on the larynx have been reported (Vaughan, 1978; Stern et al. 1980; Mayer et al. 1980) but these do not give precise histological evidence of the pattern of wound healing.