In medicine, dull shift refers to the signals obtained on physical examination for ascites (fluid in the peritoneal cavity).
This test is performed with first percussion of the midline of the abdomen to induce a resonant tone due to gas in the stomach. If there is no resonance area, then the test can not be performed. Percussion is then moved increasingly laterally (away from the examiner) - this is described as the red part in the diagram on the right - until the note becomes dull, as illustrated by the green part. The index finger of the examiner remains on the resonance side, and the middle finger remains on the dull side, straddling the air-fluid level. Patients were then asked to lean on their right lateral side (assuming the examiner used a traditional right-hand approach). This stabilizes the patient by positioning them between the examiner's hands and the body. It is important that the examiner's finger remains in the same position. After waiting for enough time for each fluid to shift (up to 30 seconds), the blunt position is then calibrated. Maybe now resonate. Percussion can now be done on the anterior side until a new dull occurs. To ensure a positive result, it is recommended that the resonant area is now dull again when the patient returns in the supine position.
If the boundary between the tympanic (resonance) and the boring note remains the same, the person may not have ascites, or have less than 2 liters of free fluid. If the fluid that causes dull is not free, then the air fluid level will not move. Dull shifts are usually present if the volume of ascitic fluid is greater than 1500 ml. If low volume ascites are suspected, attempts to obtain a puddle mark may be performed.
In some cases, ascites collide to form larger ascites. This creates different types of changing estrangement.
Video Shifting dullness
See also
- Stomach examination
- Liquid wave test
- Pelvic side
- Inundation marks
Maps Shifting dullness
References
Source of the article : Wikipedia
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