JPH08103492A - Catheter for suction - Google Patents

Abstract

PURPOSE: To obtain a safe and efficient catheter by providing a suction pipe with a side pipe to be installed in combination therewith, opening both at the front ends and forming a catheter in such a manner that the front end of an intermediate partition wall leaves a gap without arriving at the front end of the catheter and or the front end of the intermediate wall is notched to make the intermediate wall vibratable at the time of use. CONSTITUTION: A negative pressure is generated in a suction pipe cavity 1 and the phlegm, etc., to be sucked are sucked to the front end of the catheter when the suction pipe is connected to a suction pipe and the negative pressure is applied thereon in the case of the shape lacking the intermediate wall 3 of the front end. The effect of this negative pressure acts on the side pipe through the non-closed lacking part according to this suction and, therefore, the air and medicinal liquid in the side pipe cavity 2 are eventually sucked out through the lacking part to the suction pipe cavity 1 side. The sucked out flow simultaneously washes the viscous object, such as phlegm 8, at the front end of the catheter, thus having the effect of making the suction easy and preventing the closing of the lacking part with the object. For example, a danger of forming an atelectasis is averted at the time of sucking the phlegm of the lung.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for sucking and removing a viscous substance from a living body or a mechanical device by substituting it with air, water, a chemical solution, or the like and washing it.

[0002]

2. Description of the Related Art Most suction catheters used in the medical field consist of a single tube. Therefore, the technique of suction sometimes creates an abnormal state for the human body. In the case of aspirating sputum from the bronchus of the lung, for example, when the tip of the aspiration tube fits into the lumen of the bronchus, the part in front of it receives the negative pressure of suction directly and is physiologically excessively negative. This creates pressure, which causes the anterior bronchi to collapse and become atelectasis. This causes dyspnea and pneumonia. (Fig. 4 a, b, c)

[0003] One of the conventional methods is the Terumo Safide gastric tube catheter. This is a gastric tube catheter with a side tube, and the tip part is basically closed so that the side tube reaches the vicinity of the tip and has a side hole in the suction tube. The difference from the present invention will be described later.

Further, the catheter device disclosed in JP-A-5-84307 is a removal method by ejecting a liquid at a positive pressure.

[0005]

Taking as an example the suction of sputum in the bronchus as shown in FIG. 4, when the tip of the suction tube advances into the bronchus and fits into the lumen, the space in front of it is sucked. Directly receives negative pressure, resulting in collapsed bronchi (atelectasis). This causes pneumonia and dyspnea.

It is an object of the present invention to solve the above problems and provide a safer and more effective catheter.

[0007]

In order to solve the above problems, in the catheter of the present invention,
Provide a side tube attached to the suction tube (Fig. 1, 2, 3),
In either case, the tip of the catheter is open, and the tip of the intermediate partition wall (intermediate wall) is partially missing (Fig. 1). D. The tip of the intermediate wall does not reach the catheter tip, leaving a gap. Shaped (Fig. 2), or (e) Make one or more notches on the tip of the intermediate wall so that the tip of the intermediate wall can vibrate during use (Fig. 3).

With such a shape, when a negative pressure is applied to the suction tube, the opening of the side tube is exposed to the negative pressure due to the suction of the suction tube, so that the inside of the side tube becomes negative pressure.

Therefore, if the side portion of the side tube is exposed to the atmosphere, air is sucked, and if the side tube is placed in a physiological saline solution or a cleaning chemical solution, those solutions are sucked into the side tube in accordance with the negative pressure at the tip. It then reaches the tip (Fig. 6).

By this method, for example, it is possible to prevent atelectasis from being caused by suctioning sputum in the bronchus and to wet the sputum to facilitate suction.

The difference between the above-mentioned Terumo gastric tube catheter and the present invention is that, in the present invention, both the suction tube and the side tube are opened at the most distal end, and the air and the washing liquid from the side tube are also opened. That is, the structure of the flow directly contacts the object to be sucked (FIG. 6).

The catheter of Japanese Patent Laid-Open No. 5-84307 is a removal method by ejecting a cleaning liquid with a positive pressure, and its mechanism of action is different from that of the present invention.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to the drawings. FIG. 1 shows the catheter according to claim 1, and FIG. 1-a shows the structure of the distal end portion in a cross section perpendicular to the axis. FIG. 1-b is a cross section as seen from a direction perpendicular to the intermediate wall, and the plane AA is shown in FIG. 1-a. FIG. 1-c shows a cross section taken parallel to the intermediate wall. Reference numerals in the drawings are 1. suction lumen 2, side lumen 3, intermediate wall 4, tip portion 5 of intermediate wall, and missing portion.

In the case where the tip portion shown in FIG. 1 is missing, when a suction tube is connected to a suction device and negative pressure is applied, the result shown in FIG.
As the inside of the suction tube becomes negative pressure, the sputum to be suctioned is sucked to the tip of the catheter, but the negative pressure action also extends to the side tube through the deficient portion that is not yet blocked, and therefore the air inside the side tube is sucked. The drug solution and the drug solution are sucked out to the suction tube side through the defective portion. The sucked flow has the effects of simultaneously washing a viscous object such as sputum at the tip of the catheter to facilitate suction and preventing the defect from being blocked by the object.

FIG. 2 shows a case in which the tip portion of the intermediate wall described in claim 2 does not reach the tip of the catheter and a void is left there. FIG. 2-a is a sectional view in a direction perpendicular to the axis. FIG. 2-b is a cross section when viewed perpendicularly to the intermediate wall, and 2-c is a cross section when viewed parallel to the intermediate wall. Both are BB
Plane is shown in FIG.

In the case of this shape, the practical situation is almost similar to that of the first aspect, but since the defective portion has a wider shape, so to speak, it is difficult for the object to be clogged at the tip portion.

Further, in the case of the shape of claim 3, as shown in FIG. 3, a notch is formed in the tip portion of the intermediate wall (which is considered to be a deformation of the "missing" shown in claim 1), and therefore the tip portion of the intermediate wall is air. The liquid or drug solution can pass therethrough and vibrate at that time, and when suctioning, the viscous target object sucked at the tip can be effectively sucked.

When there is one cut near the center of the intermediate wall, the intermediate walls on both sides of the cut open to the suction tube side in accordance with the negative pressure of the suction lumen, and the opening formed therein is defined in claim 1. It has the same effect as the defect. Also, such movement of the tip of the intermediate wall has the effect of preventing clogging at the tip of the catheter.

When there are two cuts, the region sandwiched between them is pulled toward the suction tube and the movement thereof is different from the case where there is one cut, but an opening is formed at the tip of the intermediate wall. The same effect as in the above case occurs. Also, the movement of the tip of the intermediate wall has the effect of preventing clogging in this part.

In the case of a plurality of side pipes according to claim 4, it is possible to separately inhale a plurality of gases and medicines and combine them at the tip portion, and to deal with such a case where such work is required. Is possible.

FIG. 7 is a cross section of an intermediate portion of the entire catheter, and FIG. 8 shows the appearance of the proximal portion.

FIG. 5 shows the case of phlegm in the bronchus and an example of suction, and FIG. 6 is an enlarged view of FIG. 5, in which the negative pressure of the suction tube sucks out the cleaning solution from the side tube, washing the sputum. Show where you are sucking.

[0023]

The present invention has the following effects.

Compared with the conventional single-tube suction tube, the suction is performed while substituting the air or the chemical liquid for cleaning, so that the object can be easily washed by air or the chemical liquid, and for example, sputum of the lung. When inhaling, you can avoid the risk of creating atelectasis.

By closing the mouth of the side tube at the hand side, it can be handled in the same manner as a single tube type suction tube.

[Brief description of drawings]

1 is a front end portion of the example of claim 1, FIG. 1-a is a cross section taken at a right angle to an axis, and FIG. 1-b is a case where an intermediate wall is taken at a right angle; The cross section is shown in Figure 1-a. FIG.
-C is a cross section viewed parallel to the intermediate wall.

FIG. 2 is a front end portion of the example of claim 2, FIG. 2-a is a view seen at right angles to the axis, and FIG. 2-b is a view seen at right angles to the intermediate wall. The front end of the intermediate wall is shown slightly below the tip of the catheter leaving a void (5) there. A cross section of BB is shown in FIG. FIG. 2-c is a cross section seen parallel to the intermediate wall.

FIG. 3 is a front end portion of the example of claim 3; Fig. 3-a is a view perpendicular to the axis, and Fig. 3-b is a view perpendicular to the intermediate wall. The state where the notch is one (a) or two (b) is shown.

[Fig. 4] Suction with a conventional single tube (Figs. 6-a and 6-b)
Shows that the tip of the suction tube fits into the bronchus and collapse of the bronchus due to excessive negative pressure appears (Fig. 6-c).

FIG. 5 shows a suction according to the invention.

FIG. 6 is an enlarged view of the catheter of the present invention during suction.
The air and chemicals sucked out from the side pipe due to the negative pressure at the tip of the suction pipe indicate that the air is being sucked while cleaning and replacing the object.

FIG. 7 is a cross section of an intermediate portion of the entire catheter.

FIG. 8 is an appearance of a hand portion.

[Explanation of symbols]

 1 Suction Lumen 2 Side Lumen 3 Intermediate Wall 4 Front Edge of Intermediate Wall 5 Missing Part (Vacation) of Intermediate Wall 6 Notch of Intermediate Wall 7 Hand Part of Suction Tube (Connected to Suction Device) 8 Hand Part of Side Tube 9 Sputum

Claims (4)

[Claims] 1. A catheter comprising a suction tube and a side tube attached to the suction tube, the shape of the tip of which is such that both the suction tube and the side tube are open at the tip of the catheter, and the shape is between the side tube and the suction tube. A catheter in which the most distal part (front edge) of the partition wall (intermediate wall) is partially missing, and the defective part serves as a short-circuit path between the suction lumen and the side lumen. 2. The catheter of claim 1, wherein the intermediate wall tip (leading edge) defect extends over the entire width of the intermediate wall so that the intermediate wall tip does not reach the tip of the catheter, leaving a void therein. 3. The catheter according to claim 1, wherein the intermediate wall has a distal end portion in the form of one or more incisions. 4. The catheter according to claim 1, wherein two or more side tubes are provided.