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Table 2 The hazards class and concentration of carbon dioxide, formaldehyde and carbon monoxide in surgical smoke before LEEP and during LEEP

From: Chemical composition of surgical smoke produced during the loop electrosurgical excision procedure when treating cervical intraepithelial neoplasia

Chemicals Hazards class (IARC) LMD Before LEEP During LEEP P value
Carbon dioxide NA 0.01 0.072 ± 0.007 % 0.098 ± 0.015% < 0.001
Formaldehyde 1 0.01 0.012 ± 0.001 mg/m3 0.023 ± 0.009 mg/m3 < 0.05
  1. LEEP, loop electrosurgical excisional procedure; IARC, International Agency for Research on Cancer, 1, carcinogenic to humans; 2A, probably carcinogenic to humans; 2B, possibly carcinogenic to humans, less than sufficient evidence; 3, not classifiable as to its carcinogenicity to humans; NA, not available in IARC; LMD, lowest mass of detection