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Acta gastroenterol. latinoam ; 36(3): 131-138, 2006. ilus
Article in Spanish | LILACS | ID: lil-461599

ABSTRACT

Objetivo: mostrar una nueva técnica de evaluación prequirúrgica del hígado utilizando tomografía computada multidetector (TCMD), determinando la utilidad de las reconstrucciones angiográficas, la volumetría hepática y la hepatectomía virtual, en correlación con los hallazgos quirúrgicos. Métodos: veinte pacientes con tumores hepáticos primarios o secundarios fueron evaluados con TCMD y luego operados. Las TC se efectuaron con técnica de doble fase (arterial y venosa) con un tomógrafo de 4 filas de detectores (Mx8000; Philips Medical Systems) luego de la inyección de 120ml de contraste endovenoso con una bomba inyectora. La adquisición se realizó con una colimación de 4x2.5mm. Las imágenes se evaluaron en conjunto con los cirujanos. Se calcularon los volúmenes hepáticos, se realizaron reconstrucciones vasculares y se efectuó la hepatectomía virtual. Se determinó la correlación del volumen de hígado a resecar establecido por la hepatectomía virtual y el de la pieza quirúrgica mediante el método de Bland y Altman. Resultados: la hepatectomía virtual permitió planificar y realizar en todos los pacientes la cirugía en un solo tiempo quirúrgico. No se produjeron complicaciones. El coeficiente de correlación fue 0.83 (IC 95%: -132.08- 159.78). Conclusiones: la hepatectomía virtual prequirúrgica es una nueva herramienta diagnóstica de la TCMD que, junto con las reconstrucciones vasculares, es útil para determinar la técnica quirúrgica a realizar en cada paciente y para estimar si el volumen hepático remanente será suficiente para evitar el desarrollo de una insuficiencia hepática post-quirúrgica.


Aim: to show a new technique of presurgical liver tumor evaluation using multidetector computed tomography (MDCT), determining the usefulness of angiographic reconstructions, presurgical virtual hepatectomy and 3D liver volume determination, in correlation with surgery findings. Methods: twenty patients with primary or secondary liver tumors were evaluated with MDCT and then operated on. Dualphase CT was performed in all patients on a 4-row multidetector CT scanner (Mx8000; Philips Medical Systems) after mechanical injection of 120ml of iodinated contrast medium. Scanning was performed using a detector configuration of 4x2.5mm. Images were sent to a workstation and they were analysed with the surgeons. The 3D volumes of each lesion, of the total liver and of the segments to be resected were calculated. Vascular reconstructions and virtual hepatectomy were also performed. Correlation of the liver volume between MDCT and surgery was calculated using the Bland and Altman method. Results: virtual liver segmentation allowed to perform the surgery in 100 % of the patients in one time and there were no complications. The correlation coefficient was 0.83 (CI 95%: -132.08, 159.78). Conclusions: presurgical liver hepatectomy is a new application tool of MDCT. The angiographic findings and the volume determination are useful to determine the surgical technique for each patient and this information allows the surgeons to know if the remnant liver will be enough for the patients to avoid a post-surgical liver insufficiency.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Angiography/methods , Hepatectomy/methods , Image Processing, Computer-Assisted , Image Processing, Computer-Assisted/methods , Liver Neoplasms , Liver , Tomography, X-Ray Computed/methods , Angiography/instrumentation , Contrast Media , Hepatectomy/instrumentation , Hepatic Artery , Hepatic Veins , Imaging, Three-Dimensional , Liver Neoplasms/pathology , Liver Neoplasms/surgery , Liver/blood supply , Liver/pathology , Organ Size
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