CPT® Code 43756

Duodenal intubation and aspiration, diagnostic, includes image guidance; single specimen (eg, bile study for crystals or afferent loop culture)

The procedure described by CPT® Code 43756 involves the diagnostic process of duodenal intubation and aspiration, which is performed to collect a single specimen for analysis, such as a bile study for crystals or an afferent loop culture. This procedure is typically indicated when there is a need to evaluate the contents of the duodenum, which may provide critical information regarding gastrointestinal conditions. The process begins with the insertion of a gastric tube, which can be done through the nose or mouth, depending on the patient's anatomy and comfort. If the nasal route is chosen, the practitioner examines the nostrils to select the more open one for tube insertion. To facilitate the procedure and minimize discomfort, local anesthesia in the form of viscous lidocaine is applied to the selected nostril. The length of the tube required for proper placement into the duodenum is estimated and marked accordingly. The tube is then carefully advanced through the nasal passage into the nasopharynx, and the patient may be instructed to sip water to aid in the progression of the tube through the oropharynx, esophagus, and into the stomach, ultimately reaching the duodenum. Image guidance is utilized throughout the procedure to confirm that the tube is correctly positioned in the duodenum. Once the tube is in place, a single specimen of duodenal content is collected for further analysis, which is essential for diagnosing various gastrointestinal disorders. This procedure is distinct from CPT® Code 43757, which involves the collection of multiple specimens for a more comprehensive evaluation of duodenal contents and the secretions from the pancreas and gallbladder.