CT parameters of infected intraabdominal collections and their bacteriological correlation
Computed tomography (CT) is a widely used tool in detection of intraabdominal collections, and useful for determining the need of drainage.The aim of the present study is to evaluate CT images and their ability to differentiate the presence of infection in intraabdominal collections, correlating ima...
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| Autores principales: | , , , , , , , |
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| Formato: | Artículo revista |
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Universidad Nacional Córdoba. Facultad de Ciencias Médicas. Secretaria de Ciencia y Tecnología
2022
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| Acceso en línea: | https://revistas.unc.edu.ar/index.php/med/article/view/39090 |
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| Sumario: | Computed tomography (CT) is a widely used tool in detection of intraabdominal collections, and useful for determining the need of drainage.The aim of the present study is to evaluate CT images and their ability to differentiate the presence of infection in intraabdominal collections, correlating imagenological findings with posterior microbiological outcomes.
Correlational, transverse and retrospective study, of 35 patients with intraabdominal collection documented by CT, whose content was cultured after percutaneous drainage. Five imagenological parameters were evaluated: attenuation, gas entrapment, wall thickness, wall enhancement and fat stranding. Data was described using absolutes and relatives frequencies; mean and standard deviation. Sensibility, specificity, positive predictive value, negative predictive value and area under the curve of each tomographical parameter were determined.
77% of cultures were positive. There was no statistically significant differences between both groups regarding sex and age, with 56% of patients masculins and an age of 66,9 ± 10,9 years in patients with positive results, whereas 50% of those with negative culture were men, and their mean age was 69,6 ± 6,6 years. Among all parameters analyzed, gas entrapment was present in 60% of positive cultures and none of the negative ones (p=0,0031); with high specificity and positive predictive value (PPV) of 100% and a sensibility of 59,2%. All other parameters showed no statistically significant differences.
The results match with other studies in demonstrating that gas entrapment is a very specific sign with a high PPV of intraabdominal collection. However, it was expected to find differences in the rest of parameters evaluated. This could be explained by the low number of patients with negative cultures.
The decision of whether to drain a fluid collection should be based on imaging and clinical parameters. CT performance in intraabdominal collections needs further evaluations. |
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