JP2742765B2 - Suction catheter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catheter which is one of tubular medical instruments mainly used in the field of surgery, and more particularly, to a respiratory organ such as a bronchus in a living body or a mechanical device. The present invention relates to a suction catheter suitable for sucking and removing a viscous substance from air, replacing it with air, water, a chemical solution, or the like, and for sucking a target object while washing.

[0002]

2. Description of the Related Art Aspiration catheters for organs of the respiratory system used in the medical field include those having a single tube structure consisting of a single tube, or those comprising a plurality of tubes. There is a tube structure, a single tube structure is designed to suction and remove a viscous substance from the distal end portion of the catheter by depressurizing the inside of the tube, and a multi-tube structure is any one of them. By suctioning the inside of the tube under reduced pressure, the tube is used as a suction tube, and the remaining tube is used as a side tube for supplying liquid or gas or for inserting various instruments,
A viscous substance is sucked and removed from the tip of the suction tube.

Further, as disclosed in Japanese Patent Application Laid-Open No. 5-84307, there is a method in which a viscous substance is washed away by jetting a liquid at a positive pressure to remove it.

[0004]

However, in the former method, since the distal end of the catheter at the suction portion side has a planar structure regardless of whether it is a single tube structure or a multi-tube structure, the technique of suction is sometimes difficult. In some cases, an abnormal condition may be created for the human body. That is, taking the case of sucking sputum from the bronchi of the lung as an example, FIGS. 5 (a) to 5 (c)
As shown in (1), when trying to aspirate and remove sputum (B '), which is a viscous substance, on the suction side of the catheter (31) in which the inside of the tube is suctioned under reduced pressure, sometimes the tip (39) of the catheter (31) is inadvertently removed. May be stuck in the lumen of the bronchus (A '), and the front part of the bronchus, into which the suction part of the catheter has stuck, is directly subjected to the negative pressure of suction and becomes physiologically excessive negative pressure. Since the bronchi are in a state of atelectasis that is collapsed, it becomes one of the causes of dyspnea and pneumonia, and creates an unfavorable state for the human body.

[0005] On the other hand, the latter means is intended to remove substances such as sputum by injecting a liquid with a positive pressure, so that only the suction action by the suction pipe as in the present invention is used. The basic removal means is different from the one that attempts to remove substances such as sputum by suction.

[0006] As one of the conventional methods, there is a Safide (registered trademark) gastric tube catheter manufactured by Terumo Corporation. This is a gastric tube catheter having a side tube, which is basically closed at the distal end, and the side tube reaches inside near the distal end. However, since the gastric tube catheter as described above does not have an open distal end, a side hole that is a suction port for a substance to be removed is provided on the side of the catheter, and the distal end is entirely opened. The object of the present invention, in which the flow of air or cleaning liquid directly hits the object to be sucked, is based on a concept which is fundamentally completely different in structure.

An object of the present invention is to solve the above-mentioned problems and to provide a safer and more effective catheter.

[0008]

SUMMARY OF THE INVENTION According to the present invention, at least one suction lumen which is branched at the base end side and is independent of each other, is merged at the front end side and integrally formed through an intermediate partition wall is provided. A catheter having a multi-lumen structure comprising the side lumens described above, wherein the distal end of the catheter is opened on both the suction lumen side and the side lumen side, and the suction lumen and the side lumen are opened. By providing one or two or more cuts at the tip of the intermediate partition that separates the intermediate partition, a short circuit path in which a part of the intermediate partition is linearly lost is formed.

[0009]

When the distal end of the intermediate partition wall, which separates the suction lumen and the side lumen that are both open at the distal end of the catheter, is cut off to form a short-circuit path, the suction lumen is reduced in pressure. If the side lumen side also becomes negative pressure through the short-circuit path, if the proximal end of the side lumen side is exposed to the atmosphere, air is sucked into the side lumen and the proximal end of the side lumen side Is placed in a physiological saline solution or a cleaning solution, the solution is sucked into the side lumen, so that the distal end of the catheter does not get stuck in the lumen of the bronchus. At this time, by performing suction while sucking a physiological saline solution or a cleaning solution, it becomes possible to wet a sticky substance such as sputum and facilitate suction.

In addition, if the short-circuit path is partially cut off linearly by providing one or two or more cuts at the end of the intermediate partition, the suction lumen side is set to a negative pressure, and When the suction material such as is sucked, the distal end portion of the intermediate partition provided with the cuts is in a state where it can vibrate at that time by the passage of air or a chemical solution. Is prevented from clogging, and smooth suction of the viscous suctioned material sticking to the distal end portion is performed. That is, in the case where only one cut is provided in the vicinity of the center of the intermediate partition, the ends of the intermediate partition on both sides of the cut open toward the suction lumen according to the negative pressure of the suction lumen, In the case where one notch is provided near each end of the intermediate bulkhead, the central portion of the intermediate bulkhead sandwiched between the two cuts is pulled toward the suction lumen side according to the negative pressure of the suction lumen. It becomes.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. According to the present invention, as shown in FIG. 1, a suction lumen (2) and a side lumen (3) are branched at a proximal end side and have independent ends, respectively, and a suction lumen at a distal end side. (2) The side lumen (3) is merged with each other and integrally formed through the intermediate partition (4), and has a common end, and has a double-tube catheter made of a flexible synthetic resin. And
The distal end of the catheter is open on both the suction lumen (2) side and the side lumen (3) side, and separates the suction lumen (2) from the side lumen (3). By forming a short-circuit path (5) near the center of the front end of the intermediate partition wall (4), which connects the suction lumen (2) and the side cavity pipe (3) each formed of a single linear cut. This is to be used as a suction catheter (1).

When the suction catheter (1) thus constructed is connected to an external suction device (not shown) at the base end of the suction lumen (2) and a negative pressure is applied thereto, the suction catheter (1) shown in FIGS. FIG.
As shown in (1), the suction lumen (2) of the suction catheter (1) removes the suction-removed substance (B) such as sputum clogged in the bronchi (A) due to negative pressure in the suction lumen (2). However, since a short-circuit path (5) formed of a linear cut is formed in the intermediate partition (4), the side lumen (3) is passed through the short-circuit path (5). ), The ends of the intermediate partition walls (4a, 4a) on both sides of the short-circuit path (5) respectively correspond to the suction lumens (2). ), So that the distal end (9) on the suction lumen (2) side is not completely closed in the dark.

Further, the flow of the air or the chemical solution to be sucked and the vibration of the end portions (4a, 4a) of the intermediate partition wall are caused by the viscous substance (B) such as sputum attached to the tip of the suction catheter. ) To make it easier to aspirate.

Further, as a second embodiment of the present invention,
As shown in FIG. 4, the suction lumen (12) and the side lumen (13) branch off on the proximal end side and have independent ends, respectively. On the distal end side, the suction lumen (12) and the suction lumen (12) A catheter having a double tube structure made of a flexible synthetic resin, wherein the side lumen (13) is merged with each other and integrally formed through an intermediate partition (14) to have a common end, The distal end of the catheter is open on both the suction lumen (12) side and the side lumen (13) side, and separates the suction lumen (12) from the side lumen (13). Intermediate partition (1
Suction is formed by forming two short-circuit paths (15a, 15b) respectively connecting the suction lumen (12) and the side lumen (13), each of which is formed by a linear cut, near both ends of the distal end of (4). As a catheter for medical use (11).

[0015] The suction catheter (1)
1) As in the previous embodiment, when the proximal end side of the suction lumen (12) is connected to an external suction device (not shown) and a negative pressure is applied, the short-circuit paths (15a, 15b) are closed. Through the side lumen (1
3) The two short-circuit paths (15a, 15a) are drawn in response to the suction of air or a chemical solution by the negative pressure on the suction lumen (12) side.
Since the center part (14a) of the intermediate bulkhead sandwiched by b) vibrates so as to be drawn toward the suction lumen (12), the tip part on the suction lumen (12) side is completely completely darkened. It will not be blocked.

Although not shown, if a plurality of side lumens are provided, air and medicine can be separately suctioned and mixed at the distal end, so that it is possible to meet a wide range of demands. .

[0017]

As described above, according to the present invention, as compared with the conventionally used single-tube type suction catheter, the short-circuit path of the intermediate septum in which the air and the drug solution in the side tube vagina are partially lost is reduced. The suction pipe will be sucked into the vagina side, and this sucked flow will wash viscous objects such as sputum at the tip of the catheter and make it easier to suck, and when aspirating and removing lung sputum The danger of creating a state of atelectasis can be avoided. Further, by closing the mouth of the side cavity tube, it can be handled in the same manner as a single-tube suction catheter.

[Brief description of the drawings]

FIG. 1A is a front view showing a distal end portion of a suction catheter of the present invention, and FIG.

FIG. 2 is a cross-sectional view illustrating a use state of the suction catheter of the present invention.

FIG. 3 is a partially enlarged sectional view showing a distal end portion of the suction catheter in FIG. 2;

4 (a) is a front view and FIG. 4 (b) is a front central longitudinal sectional view showing another embodiment of the distal end portion of the suction catheter of the present invention.

5 (a) to 5 (c) are cross-sectional views for sequentially explaining a use state of a conventional suction catheter.

FIG. 6 is an enlarged view at the time of suction by the catheter of the present invention. This shows that the air or the chemical solution sucked out from the inside of the side tube by the negative pressure at the tip of the suction tube is sucking while washing and replacing the object.

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

FIG. 8 is an external view of a hand portion.

[Explanation of symbols]

 Reference numerals 1, 11: suction catheter 2, 12: suction lumen 3, 13: side lumen 4, 14: intermediate partition 4a: intermediate partition end 5: short circuit path 14a ... Central part of the middle partition wall 15a, 15b ... Short circuit path A ... Bronchi B ... Adsorption removal substance

Claims (1)

(57) [Claims] 1. A suction tube and at least one side tube which are branched and independent from each other at the base end and are integrally formed at the front end via an intermediate partition wall. A catheter having a multi-lumen structure, wherein the distal end portion of the catheter is open on both the suction lumen side and the side lumen side, and an intermediate partition wall for separating the suction lumen and the side lumen. A suction catheter, wherein one or two or more cuts are provided at a distal end portion to form a short-circuit path in which a part of the intermediate partition is missing.