Does CO2 pneumoperitoneum alter the ultra-structuture of the mesothelium?

Autor(es)

Rosário, Marcos T. A. ; Ribeiro Júnior, Ulysses ^[2] ; Corbett, Carlos E. P. ; Ozaki, Alberto C. ; Bresciani, Cláudio C. ; Zilberstein, Bruno ; Gama-Rodrigues, Joaquim J.

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF SURGICAL RESEARCH; v. 133, n. 2, p. 84-88, June 2006.
• Área do conhecimento: Ciências da Saúde - Medicina
• Assunto(s): Doenças peritoneais Pneumoperitônio

Resumo

Pneumoperitoneum may be responsible for ultra-structural alterations in the mesothelium during laparoscopy. To characterize the effect of pneumoperitoneum on the mesothelial cells with CO2 and compressed air; and to compare to laparotomy and control group (anesthesia only). Forty C-57 mice were divided in four groups of 10 animals each: CO2, air, laparotomy, and control group. The animals were submitted to pneumoperitoneum at 8 mmHg during 30 min (CO2 or compressed air). Five animals of each group were sacrificed 2 and 24 h after the procedure. Fragments of parietal peritoneum were collected and processed for scanning electron microscopy. Control group revealed uninterrupted mesothelial cells, without any evidence of cellular limits; close contact between the cells; absence of intercellular clefts and presence of microvilli. In the laparotomy group, similar results to the control group, with decreased microvilli were noted. Air pneumoperitoneum was associated with alterations in the morphology of the mesothelial cells, clear cellular limits, and cells with spherical and fusiforme formats. CO2 pneumoperitoneum showed mesothelial cells with clear cellular limits, predominantly spherical cellular format, and intercellular clefts that allowed the visualization of the exposed basal membrane. These alterations were more intense after 24 h. There was a statistical significance between CO2 group (2 and 24 h) compared to the control group and laparotomy for cellular limits, intercellular clefts and microvilli, P < 0.0001. Pneumoperitoneum causes damage in the mesothelial ultra-structure, which differs from the laparotomy group. CO2 pneumoperitoneum is more harmful to the mesothelium than the air. (AU)

• Processo FAPESP: 02/07886-0 - Estudo das alterações peritoniais decorrentes de pneumoperitônio com diversos gases
• Beneficiário: Ulysses Ribeiro Júnior
• Modalidade de apoio: Auxílio à Pesquisa - Regular