Dynamic plain abdominal radiography
Dynamic plain abdominal radiography refers to a series of X-ray images taken of the abdomen over time, often with the patient in different positions or at different stages of a physiological process. This technique is used to assess the movement and function of various structures within the abdomen, such as the gastrointestinal tract.
Purpose and Uses
- Intestinal Obstruction: It helps in diagnosing conditions like intestinal obstruction by showing air-fluid levels, dilated bowel loops, or absence of gas in certain areas.
- Perforation: It can detect free air under the diaphragm, indicating perforation of a hollow organ.
- Ileus: To differentiate between mechanical obstruction and ileus (a condition where the intestine fails to propel its contents).
- Postoperative Evaluation: Monitoring the postoperative abdomen, especially after bowel surgery.
- Gastrointestinal Motility: Evaluating the movement of contrast material through the intestines.
### Procedure 1. Initial Image: A standard plain abdominal X-ray is taken, often in the supine position. 2. Dynamic Imaging:
- Upright or Decubitus Views: Additional images are taken with the patient in an upright or lateral decubitus position to evaluate the distribution of air and fluid.
- Multiple Time Points: Images may be taken at various time intervals to observe the progression of intestinal contents or the appearance of air-fluid levels.
### Interpretation Radiologists interpret the images by looking for: - Air-Fluid Levels: Indicate potential bowel obstruction. - Dilated Bowel Loops: Suggests a blockage or decreased motility. - Free Air: Indicates a perforation. - Gas Patterns: Evaluating patterns of gas distribution to assess bowel function.
Dynamic abdominal radiography provides valuable information in acute and chronic abdominal conditions, helping guide further management or surgical intervention if necessary.