Dormia cup

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Demonstration of how a Dormia basket works
The sequence of images shows the use of a Dormia basket: the Dormia basket is extended out of the catheter and thus unfolded. A foreign body maneuvered into the basket is fixed by partially retracting the basket and can then be removed with the basket.

The Dormia basket is an instrument used in endoscopy to remove gallstones or ureter stones . A foreign body that has been brought into the lungs by aspiration can also be captured and removed, as can foreign bodies that have been swallowed into the gastrointestinal tract .

construction

The Dormia basket consists of a wire, at the end of which sits a basket that is formed from several individual wires and that can be opened and closed. A plastic catheter is usually placed over the wire with the cup at the end as an outer sheath. By pulling the basket into the catheter, it is folded up. When it is extended out of the catheter, the preformed cup is unfolded due to the restoring forces of the wire construction.

history

The instrument was originally developed by the Italian urologist Enrico Dormia (1928 - 2009), who assembled the basket from the strings of a guitar and a urinary catheter in order to extract ureteral stones under fluoroscopic control . Due to the easy-to-learn method and the small footprint of this instrument, the Dormia basket quickly established itself in endoscopy .

application

The Dormia basket is placed through the working channel of the endoscope via a guide wire, similar to the Seldinger technique , but can also be done directly without a guide wire. The stone to be recovered is moved through the wide wire mesh into the lumen of the basket, then the basket is slowly closed. In doing so, it reduces its diameter and the stone is thereby captured and fixed. If the stone cannot be extracted due to its size, mechanical lithotripsy can be performed with some suitable baskets .

Individual evidence

  1. ↑ Willibald Pschyrembel: Pschyrembel Clinical Dictionary . Ed .: Dictionary editing. 259th edition. de Gruyter, Berlin 2002, ISBN 3-11-017213-5 , p. 381 .
  2. ↑ Emanuele Montanari: Enrico dormia, MD (1928 to 2009). www.europeanurology.com, August 1, 2009, accessed February 14, 2019 .
  3. ^ Gunther Rexroth: Gastroenterology . Ed .: Gunther Rexroth. 1st edition. Verlag Hans Huber, Bern 2005, ISBN 3-456-84057-8 , p. 578 ff .