Crianças necessitam de jejum antes de ultrassonografia abdominal?

Influence of simethicone and fasting on the quality of abdominal ultrasonography in New Zealand White rabbits

Presence of significant quantities of gas in the intestines may hinder a proper conduction of abdominal ultrasonography. In humans, preparatory techniques are used to solve this, but measures to avoid ultrasonographic complications due to intestinal gas in rabbits have not been reported. The objective of this study was to evaluate the influence of fasting and simethicone administered orally on the quality of ultrasonographic images of the gallbladder, kidneys, and jejunum in adult New Zealand White (NZW) rabbits. A total of 28 adult NZW rabbits were included in a crossover design study, involving four groups: F: fasting for 4–6 h before the examination; FS: fasting and application of simethicone (20 mg/kg, orally) 20 to 30 min before the examination; S: application of simethicone 20–30 min before the examination without fasting; and C: controls without fasting and no application of simethicone. Evaluation of the ultrasonographic images was done in terms of percentage of visualization of each organ and image quality using a 3-point scoring system (unacceptable, acceptable, or excellent). The kidneys and the gallbladder were visualized at an equal frequency in all groups, while the jejunum was visualized more frequently in the FS group. The image quality scores for gallbladder, right kidney, and left kidney was similar for all groups, but for the jejunum, a higher number of images with acceptable scores was found within the FS group.

Importance of fasting in preparing dogs for abdominal ultrasound examination of specific organs

OBJECTIVE

To describe the effect of fasting on the technical success of abdominal ultrasonography specifically in respect of examination of the gall bladder, duodenum, pancreas, adrenal glands and portal vein in dogs.

METHODS

Randomised, prospective study of 150 dogs with a variety of physical characteristics. Animals were divided into two groups of 75 dogs each. Dogs in Group 1 were fasted for 8 to 12 hours before ultrasonographic evaluation and those in Group 2 were not but received food anytime between 10 minutes and 2 hours before the procedure.

RESULTS

Intraluminal gas can influence the visibility of organs, but intraluminal gas accumulation occurred independently of fasting status. The assessment of abdominal organs was not affected by whether or not an animal was fasted.

CLINICAL SIGNIFICANCE

Routine fasting of dogs before abdominal ultrasonography is not essential.