RU169651U1 - PULMON SURFACTANT INJECTION CATHETER - Google Patents

Abstract

A catheter (1) for introducing pulmonary surfactant is proposed, comprising a tube (2) made of flexible material and a support body (4) attached to its proximal end (2a), and at its other end (6) it can be mated with a syringe containing pulmonary surfactant. The tube (2) is equipped with several calibration marks (8), positioned at a given distance from each other and allowing marking on the tube (2) its continuous extension with respect to its distal end (2b). The first calibration mark (8a) is made in the form of a single line, the second calibration mark (8b) is made in the form of a double line, and the third calibration mark (8c) is made in the form of a triple line (Fig. 1)

Description

Technical field

The proposed utility model relates to a catheter for introducing pulmonary surfactant into the body of preterm infants suffering from respiratory distress syndrome and / or at risk of forming this syndrome. More specifically, this model relates to a catheter for introducing pulmonary surfactant into the body of infants who are in spontaneous respiration and are treated with nasal CPAP therapy (CPAP -continuous positive airway pressure).

State of the art

Over the past twenty years, therapy for the administration of exogenous pulmonary surfactants has been the main focus of treatment for premature infants or (as an emergency treatment) for infants suffering from hyaline membrane disorders, such as respiratory failure syndrome. With the development and improvement of many other aspects of newborn care, the use of pulmonary surfactant therapy has also changed. In particular, the last decade is characterized by a significant increase in the use of nasal CPAP therapy, which is used as a primary tool for supporting breathing and, in many cases, avoids endotracheal intubation.

However, taking into account the advantages of pulmonary surfactants, especially when administered at a sufficiently early stage, in some cases it may be decided to intubate the newborns in order to be able to administer such surfactants, and then immediately perform extubation followed by nasal CPAP therapy. This approach reduces the likelihood of subsequent mechanical ventilation and the associated risk of pneumothorax.

On the other hand, intubation of the trachea for the sole purpose of introducing pulmonary surfactants is unsafe because it can be complicated during the procedure due to the large number of attempts required, as well as the risk of hypoxia. In addition, intubation is practically always always performed with drug preparation with drugs and muscle relaxants, and this leads to a delay in extubation after the introduction of pulmonary surfactant.

Given the difficulties associated with intubation, if it is only for the introduction of pulmonary surfactants, alternative methods have been proposed for such administration, known in the literature as minimally invasive surfactant therapy (MIST) or elimination of mechanical ventilation (Avoid mechanical ventilation, AMV).

These methods provide a less invasive technique for tracheal intubation using catheters or gastric tubes for nasal administration with a reduced cross section. The use of very flexible feed tubes, which, however, have to be inserted into the trachea using Magill forceps, is not recommended for large-scale use.

Utility Model Disclosure

Based on the foregoing, the problem solved by this utility model is to create a new catheter, which is intended for the introduction of pulmonary surfactant, is made with the possibility of simple large-scale use and improves compatibility with newborns.

This and other assigned tasks are solved by means of a catheter, the distinguishing features of which are formulated in paragraph 1 of the attached formula. Specific embodiments are described in the dependent claims, the content of which, as should be understood, is an integral part of this description.

Brief Description of the Drawings

Other features and advantages of the proposed utility model will be apparent from the following detailed description, which is given only as an example, not of a restrictive nature, and should be considered in conjunction with the accompanying drawings.

In FIG. 1 is a perspective view of a catheter made in accordance with the proposed utility model.

In FIG. 2 the catheter of FIG. 1 is a side view.

Utility Model Implementation

In FIG. 1 illustrates a catheter 1, made according to the proposed utility model. It contains a tube 2 of flexible material (preferably fluorinated propylene-ethylene copolymer), the rigidity of which is sufficient so that it can be sent to the vocal cords and beyond. In addition, the tube 2 has sufficient elasticity and softness, which during intubation allows you to avoid damage to the vocal cords or other vital structures.

The introduction of tube 2 may be accompanied by direct visual control using a laryngoscope, and pulmonary surfactant should be administered as part of one or two boluses.

A blue color is preferred for the tube, and its length can be selected to be 100-300 mm (preferably 300 mm) or, alternatively, 135 mm or 130 mm (preferably 130 mm). The outer diameter of the tube is in the range of 1.65 mm (5 French) to 1.155 mm (3.5 French), preferably 1.65 mm.

In addition, the catheter 1 contains a supporting body 4 attached at its proximal end 2a to the tube 2, and at its other end 6 is configured to interface with a syringe (not shown) containing pulmonary surfactant intended for insertion.

Several calibration marks 8 are preferably applied to the tube 2, preferably of white color, which makes it possible to evaluate the extent of the tube 2 relative to its distal end 2b, which is the tip of the catheter and is accordingly rounded and smooth.

In a specific embodiment, the first, second, and third calibration marks 8a, 8b, and 8c are indicated by Roman numerals I, II, and III, respectively. The peculiarity of these Roman numerals is that they correspond to single, double and triple labels in accordance with their designation by the numbers one (Roman I), two (Roman II) and three (Roman III). In the more general version, it is not necessary to correlate the first, second and third marks with the Roman numerals I, II and III, in particular, it can be just single, double and triple line marks. For example, such a scale can be made in the form of continuous annular lines spanning the tube. This key feature of the proposed utility model provides an advantage in the form of easier and faster “reading” even in adverse conditions of poor visibility characteristic of the operations described above. The user (for example, the doctor) does not really need to “read” the number, since he can immediately see how many, one, two or three lines in the label. During an operation in such a predicament, this more intuitive perception of the label sequence may be useful.

Each calibration mark is positioned at a given distance D (preferably equal to 1 cm) from the previous one.

In addition, the tube 2 contains a fourth calibration mark 8d, positioned at a double distance 2D from the third calibration mark 8c and made in the form of a straight line segment, which is marked with the Roman numeral one, followed by the Arabic numeral five.

In addition, on the tube 2 there is another group of calibration marks (8e), each of which is positioned at a distance D relative to the previous one and is made in the form of a straight line segment, which is marked by a corresponding number selected from a sequence of Arabic numbers, preferably from six (6 ) to nine (9). These Arabic numerals are printed on two opposite sides of the tube (front and back sides) and spaced 180 ° apart, making them easy to read regardless of the position of the tube 2 relative to the operator.

The first three calibration marks 8a, 8b and 8c are not indicated in Arabic numerals, because due to the position of the mouth of the newborn during the initial stages of intubation, it will still be difficult to see.

In FIG. 2 the catheter of FIG. 1 is shown in side view, which allows a more distinct view of the designation of successive calibration marks.

A catheter made according to the proposed utility model can be used, for example, for the introduction of any pulmonary surfactant that belongs to the classes of modified natural pulmonary surfactants isolated from the lungs of mammals, as well as to the classes of synthetic or modified lung surfactants. It is obvious that if the principles on which the proposed utility model is not violated, the options and details of its implementation may differ significantly from the described and illustrated options and details, given only as an example, not of a restrictive nature. Moreover, these changes should not go beyond the scope of protection of this utility model specified by the attached formula.

Claims (9)

1. A catheter (1) for introducing pulmonary surfactant containing a tube (2) of flexible material and a supporting body (4) attached at its proximal end (2a) to the tube (2), and at its other end (6) made with the possibility of interfacing with a syringe containing pulmonary surfactant, while the tube (2) is equipped with calibration marks (8), positioned at a predetermined distance from one another and allowing marking on the tube (2) its continuous extension with respect to its distal end (2b), moreover, the first calibration mark (8a) with holds a single line, the second calibration mark (8b) contains a double line, and the third calibration mark (8c) contains a triple line. 2. The catheter according to claim 1, in which the first calibration mark (8a) is made in the form of a Roman numeral one, the second calibration mark (8b) is made in the form of a Roman numeral two, and the third calibration mark (8c) is made in the form of a Roman numeral three. 3. The catheter according to claim 2, in which the tube (2) is additionally equipped with a fourth calibration mark (8d), positioned relative to the third calibration mark (8c) at a distance equal to twice the specified predetermined distance, and made in the form of a straight line segment, followed by the arabic numeral five. 4. The catheter according to claim 3, in which the tube (2) is additionally equipped with other calibration marks (8e), each of which is positioned at a specified predetermined distance with respect to the previous calibration mark and is made in the form of a straight line segment, followed by a corresponding number selected from a sequence of Arabic numbers. 5. The catheter according to claim 4, wherein said sequence of Arabic numerals is a sequence of numbers from 6 to 9. 6. The catheter according to one of paragraphs. 1-5, in which the specified predetermined distance is 1 cm. 7. The catheter according to one of paragraphs. 1-5, in which the length of the tube is 130 mm. 8. The catheter according to one of paragraphs. 1-5, in which the outer diameter of the tube is 1.65 mm. 9. The catheter according to one of paragraphs. 1-5, in which the tube (2) is blue, and the calibration marks (8) are white.

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