Gastric probe: purpose, dimensions and technique of setting

Gastric Probe is used for both diagnostic and therapeutic purposes. This device makes it possible to examine the contents of the gastrointestinal tract and, if necessary, the duodenum. Externally, the gastric tube is a soft rubber tube. Depending on the purpose, it can be of different diameters: thick and thin.

In what cases do you designate probing

Sensing the stomach is an informative and safe procedure. It can be prescribed for many diseases, such as a stomach ulcer, gastritis, reflux disease, atony of the stomach, intestinal obstruction and others. In addition, the gastric tube is used for artificial feeding of postoperative patients.

With the help of a probe, the stomach is washed with poisoned food or poison. Also, rinsing sounding is performed with stenosis of the gastric inlet and in case of release through the gastric mucosa of toxic substances, for example, in case of renal failure.

Types of probes. Thick probe

We will describe in more detail a thick gastric tube. Dimensions of its rubber tube:

• Length from 70 to 80 cm;
• Up to 12 mm in diameter;
• Internal clearance 0.8 mm.

The far end of the tube to be inserted into the stomach is rounded. He is called blind. The second end of the probe is called open. Just above the rounding are two openings of an oval shape. Through them, the contents of the stomach enter the probe. Labels are marked 40, 45 and 55 cm from the rounded end. They correspond to the depth of immersion, that is, the distance from the dentition to the gastric entrance.

Basically, such a gastric probe is used for washing or the simultaneous preparation of stomach contents.

Thin probe

This device is in the form of a thin rubber tube, the length of which is 1.5 m. The diameter of this tube does not exceed 3 mm. The end, which is injected into the stomach, is equipped with a special olive from ebonite or silver. In the olive there are holes for the contents of the stomach. The tube is marked with three marks: 45, 70, 90. They determine the depth of immersion. At the same time, 45 cm is the distance from the dentition to the entrance to the gastric sac, 70 cm is the distance from the dentition to the pylorus, 90 cm - the probe is located near the Fater's nipple.

To swallow a thin probe is much easier. It almost does not cause a vomiting reflex and can stay in the stomach for a long time. This allows the use of thin probes to observe the separation of gastric juice and carry out fractional samples of the contents of the test cavity.

For nasal administration of a thin probe, use a soft tube without olive. Such a probe is much easier to enter and can be used much longer. Most often nasal probes are set after complicated operations or with atony of the stomach.

Duodenal probe

Such a gastric probe is intended for administration to the duodenum. Assign a similar sounding in cases of liver or bile duct disease. The probe allows you to aspirate for research bile secretion. The probe is carried out in the form of a flexible rubber tube, the diameter of which does not exceed 5 mm. The length of the probe is 1.5 m. The end, immersed in the stomach, is equipped with a hollow metal olive with holes. The thickness of the thickening is 2 by 0.5 cm. The tube is marked with labels to control immersion. Their location is 40 (45), 70 and 80 cm from the olive tree. The furthest mark approximately shows the distance from the front teeth to the papilla (duodenum).

The need for enteral feeding

In some diseases, patients receive parenteral nutrition. This means that nutrients are injected into the body intravenously, bypassing the gastrointestinal tract. But such nutrition is not always justified, since the process of absorption of nutrients from the digestive tract has several advantages. The process of introducing nutrient solutions into the stomach or small intestine is called enteral nutrition. To do this, use a thin gastric probe with a conductor. Enteral feeding through the probe helps to avoid degenerative changes in the intestinal walls. For further recovery this is very important.

Proposition of the probe

To properly install the gastric tube, the patient is prepared for manipulation. If he is conscious, explain the nuances of the procedure. Be sure to measure the pressure, consider the pulse and check the patency of the airways.

The placement of the gastric tube through the mouth requires measuring the distance from the teeth to the navel (plus the width of the palm). The corresponding mark is placed on the tube from the blind end. The paramedic becomes on the side of the patient and places the rounded end on the root of the tongue. Next, the patient performs swallowing movements, and the health worker moves the tube of the probe to the appropriate label.

When the probe is inserted through the nose, the distance from the protruding part of the nose to the earlobe is measured, and afterwards from the lobe to the xiphoid process of the sternum. The tube is marked with 2 marks.