JPH0779839B2 - Medical device plug - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a medical instrument introducing tube for introducing a treatment instrument such as a catheter or a catheter with a balloon into the body, a catheter alone, or an endoscope. The present invention relates to a plug for a medical instrument that is used by being attached to the inlet of the forceps channel.

[Prior Art] For example, a medical introduction tube body tool is used as a procedure for introducing an angiographic catheter or the like into a blood vessel.
In this case, when a catheter or the like is inserted into the introduction tube body device or when it is not inserted, the introduction is performed in order to prevent blood flow from the passage of the introduction tube body device left in the blood vessel to the outside. A plug may be provided in the passage of the mouth body. Further, even in the case of a catheter alone, a plug may be provided at the mouth portion on the proximal side for sealing for the same reason (see JP-A-59-133877).

On the other hand, in endoscopes, various treatments such as injecting a drug solution into a patient's body using a channel provided therein and introducing various treatment tools to excise and collect a lesion site are performed. Then, since dirt and air in the body cavity may leak to the outside through the channel due to the pressure change in the body cavity, in order to prevent this, generally, a sealing plug is provided at the insertion port of the channel. It is provided (see JP-A-62-275447).

[Problems to be Solved by the Invention] Since these plugs exemplified above are generally made of an elastic body such as rubber, a part of the plugs deteriorates or is damaged by insertion and removal of a treatment tool, etc. Performance may be reduced.

In addition, the plug is provided with irregularities and the like necessary for engagement with the mounting base. However, if the plug is contaminated with body fluids, etc., the concavities and convexities result in poor cleaning performance, and stains can be easily and completely removed. Difficult to remove.

For these reasons, it is considered to make the plug disposable.

As this type of disposable type, Japanese Patent Application No. 1-84
There is an unpublished invention related to the application for No. 447. This invention
On the outer periphery of the stopper, a finger-holding knob is provided, and a thin-walled portion for breaking that is connected to the finger-holding knob is provided. It was designed to be removed from the body attachment base.
Further, once the plug is removed in this manner, the plug itself is cut and cannot be used again.

However, this disposable type stopper is
It is made of an elastic material such as rubber, and when the stopper is attached to the endoscope side attachment mouthpiece, the engagement portion of the stopper body fits into the engagement portion of the stopper body attachment mouthpiece. It is necessary to elastically deform the plug until it is pushed in.

On the other hand, although the plug is to be removed from the attachment mouthpiece, if the procedure is the reverse of the case where the knob is attached without pulling the knob portion, it is possible to remove the plug without destroying it. Therefore, there is a possibility that the disposable type may be reused.

The present invention has been made by paying attention to the above-mentioned problems, and the purpose thereof is that it is easy to attach to a cap attachment mouthpiece, and that it can be surely attached and also has a sealing property when attached. At the same time, it is to provide a plug for a medical device that is surely unusable once it is mounted and then removed.

[Means and Actions for Solving the Problems] In order to solve the above problems, the present invention provides a plug for a medical device, which is attached to a mouthpiece of a medical device and is used to close the mouth of the mouthpiece, from an elastic member. The stopper body is held in a stopper frame made of a relatively hard material, and the stopper frame is in a state in which the stopper frame cannot be reused when the stopper is removed, and the engaging portion that engages with the mouthpiece side of the medical device. A thin portion for breaking is provided for breaking.

Since the plug body is connected to the mounting mouthpiece by a relatively hard plug frame made of, for example, plastic, it can be securely mounted. Further, once attached, the plug cannot be removed without destroying it. However, since the stopper frame is provided with a thin portion for breaking for removal, it can be easily removed by breaking it.
Also, if you remove it, a part of the stopper will be broken and you will not be able to reuse it, and you will be sure to replace it with a new one each time you use it. The risk of infectious diseases can be eliminated as the risk increases.

[Embodiment] FIGS. 1 to 5 show a first embodiment of the present invention. FIG. 5 shows the overall appearance of the endoscope 1 using the plug body to which the present invention is applied. The endoscope 1 includes an operating portion 2 and an inserting portion 3, and the operating portion 2 includes a treatment tool 4 such as forceps.
An insertion port body 5 is provided for inserting. The insertion opening 5 extends from the operation portion 2 to the insertion portion 3 and communicates with a treatment instrument insertion channel 6 provided therein. The distal end of the treatment instrument insertion channel 6 is open at the distal end of the insertion portion 3. The treatment instrument 4 can be inserted into the treatment instrument insertion channel 6 to guide the treatment instrument 4 to the tip of the insertion portion 3 and to guide the treatment instrument 4 to the outside.

A plug body 8 for keeping the treatment instrument insertion channel 6 airtight from the outside is detachably attached to the mouthpiece portion of the insertion mouth body 5. FIG. 1 shows a state near the insertion port body 5 with the plug body 8 attached.

The stopper 8 is composed of an upper stopper main body 9 and a lower stopper main body 10 which are integrally formed of an elastic member such as rubber, and a stopper frame 11 which is integrally formed of a plastic resin. The lower plug body 10 is formed in a tubular shape with the lower end closed, and the closed lower end portion is a dome shape (hemispherical) protruding downward.
Which constitutes the closing membrane part (12). That is, the cross-sectional shape of the closing film portion 12 is U-shaped as shown in FIG. In addition, a slit 13 for hermetically inserting an insertion portion such as a treatment tool or a syringe is formed in the center of the closure film portion 12. Usually, the slit 13 is airtightly closed by the elastic force of the closing film portion 12. A flange portion 14 for engaging with the upper stopper body 9 is provided on the upper end portion of the lower stopper body 10.

The upper stopper body 9 is installed above the lower stopper body 10, and the inner peripheral surface of the lower end portion of the upper stopper body 9 is hermetically fitted and engaged with the flange portion 14 of the lower stopper body 10. An annular groove portion 15 is formed. Further, a closing film portion 16 is integrally formed on the upper end portion of the upper stopper body 9, and a slit 17 for hermetically inserting an insertion portion of a treatment tool, a syringe or the like is formed in the center of the closing film portion 16. Is formed. Normally, the slit 17 is airtightly closed by the elastic force of the closing film portion 16.

The upper plug body 9 and the lower plug body 10 constitute the plug body in the engaged state as shown in FIG. The plug body is housed and held in a plug frame 11 made of a relatively hard (including semi-hard) material described later. That is, the plug frame 11 is formed in a tubular shape having the upper end wall 11a, and the inner peripheral surface thereof is formed with the annular groove portion 19 for hermetically engaging the annular projection 18 formed on the outer peripheral surface of the upper plug body 9. Has been done. This makes the gap between the plug body and the plug frame 11 airtight. The same function can be obtained by providing the annular protrusion 18 on the outer peripheral surface of the lower plug body 10.

Further, on the inner peripheral surface of the stopper frame 11, the stopper body described above is provided.
A protrusion 20 is provided for holding the inside of the. The hooking projection 20 is provided at a position where the lower end surface 21 of the lower plug body 10 engages when the annular projection 18 of the upper plug body 9 and the annular groove portion 19 of the plug frame 8 are fitted to each other. Has been.

As described above, in the above-mentioned stopper bodies (upper stopper body 9 and lower stopper body 10), the upper stopper body 9 is positioned above the lower opening end of the stopper frame 11, and the lower end surface 21 of the lower stopper body 10 is hooked. It is installed at a position where it is caught by the projection 20 for use, that is, by pushing the projection 20 until the plug body gets over.

On the inner peripheral surface of the plug frame 11 located below the hooking projection 20, the flange portion of the mouthpiece portion of the insertion opening body 5 of the endoscope 1 is provided.
An annular groove 23 is formed that fits airtightly with 22. Further, the inner peripheral surface between the annular groove portion 23 and the lower end of the plug frame 11 is formed as a tapered portion 24 diverging toward the lower end as is apparent from FIG.

On the other hand, on the outer peripheral surface of the plug frame 11, an annular cut groove 25 is formed in an upper portion including the annular groove portion 23 of the inner peripheral surface, and the portion is thinly formed. Further, as shown in FIGS. 1 to 4, a tongue-shaped knob 26 projects from the outer peripheral surface below the annular cut groove 25, and this knob 26
Are continuously connected to the plug frame 11.

Further, as shown in FIG. 4, a cut groove 27 is formed at one end of the connecting portion between the knob 26 and the plug frame 11 along the axial direction (vertical direction) of the plug frame 11. The cut groove 27 is formed continuously from the annular cut groove 25 described above up to the lower end of the plug frame 11. The cut groove 27 and the annular cut groove 25 connected to the cut groove 27 form a thin portion for breaking, and the plug frame 11 can be easily broken along the thin portion. The thin portion for breaking may be a perforation. That is, it is sufficient if the structure can be broken along it.

Further, the upper end wall 11a of the stopper frame 11 is formed with a hole 28 for inserting an insertion portion such as a treatment tool or a syringe. Normal,
The size of the hole 28 is set to be substantially equal to the outer diameter of the insertion portion such as the syringe.

Then, when using such a plug body 8, it is fitted by pressing the plug body 8 against the flange portion 22 of the insertion port body 5.

After use, when removing the plug 8, as shown in FIG.
Grasp the knob 25 with your finger and pull it in the circumferential direction of the arrow. Then, from the cut groove 27 to the annular cut groove 25, the plug frame is sequentially
11 is torn and finally divided from the annular cut groove 25 into two parts, an upper part and a lower part. As a result, the plug 8 can be removed from the insertion opening 5 very easily.

As described above, the portion of the insertion opening body 5 on the endoscope 1 side that fits with the flange portion 22 is the plug frame 11, which is formed of semi-hard plastic, and therefore fits when used. Due to the taper structure of the portion, it is possible to easily fit and securely mount with a small resistance. However, once fitted, it cannot be removed without breaking the plug.

At the time of removal, the plug body can be easily removed by pulling the knob 26, and it is broken into a state in which it cannot be attached to the insertion port body 5 again. Therefore, it is safe without the plug body being reused and causing the above-mentioned unsanitary trouble.

On the other hand, the insertion hole 28 of the stopper frame 11 is provided with a diameter substantially equal to the diameter of the insertion portion of the syringe, and when the syringe is inserted into the stopper body 8, the insertion portion of the syringe or the like is regulated by the semi-rigid stopper frame 11. Since it always faces the center of the insertion port, the risk of damaging the closing membrane bodies 12, 16 and the slits 13, 17 by the tip of the syringe is greatly reduced.

When the insertion portion of the syringe is inserted into the stopper body 8, the insertion portion of the syringe is the lower stopper body 10 of the stopper body 8.
Even if a restriction portion a such as a projection against which the tip of the insertion portion of the syringe abuts is formed in the upper stopper body 9 or the lower stopper body 10 so as not to go deep into the closing membrane portion 12 in FIG. Good. The restriction portion a restricts the insertion portion of the syringe from being inserted more than necessary and does not penetrate deeply into the closing membrane portion 12. In this way, the closing membrane part 12,
In particular, the slit 13 portion can be prevented from being sandwiched between the flange portion 22 of the insertion opening body 5 of the endoscope 1 and the insertion tip portion of the syringe. Therefore, it is possible to prevent damage to the closing film portion 12 having the slit 13.

Further, the peripheral edge portion b of the opening portion of the flange portion 22 of the insertion opening body 5 on the endoscope 1 side against which the closing film portion 12 having the slit 13 is abutted.
May be formed by an elastic member as shown in FIG. 1, for example. By doing so, it is possible to prevent the deterioration of the closing film part 12 sandwiched between the flange part 22 and the tip of the insertion part of the syringe, particularly the deterioration of the slit 13 part thereof.

Further, when inserting the tip of the insertion portion of the syringe into the closing membrane portion 12 having the slit 13, the slit 13 is pushed downward while listening, but the edge portion of the slit 13 is on the endoscope 1 side. The plug body 8 is designed so as not to hit the flange portion 22 of the insertion opening body 5, and in the above-described embodiment, the closing film portion 12 of the lower plug body 10 is designed. For example, the closing film portion 12 having the slit 13 is configured to be sufficiently separated from the flange portion 22 (see FIG. 7 described later).

In addition, the upper stopper body 9 and the lower stopper body 10 in the above-mentioned embodiment may be integrally formed, or a single closing film may be used.

6 to 8 show a second embodiment of the present invention. FIG. 6 shows the plug 8 as a whole, and FIG. 7 shows the plug 8 attached to the insertion opening 5 of the endoscope 1.

The plug 8 has a tab 29, which is in the form of a tongue piece, formed integrally with the plug frame 11 at the lower end of the side wall of the tubular portion of the plug frame 11. Also, the knob
Two cut grooves 30 are continuously formed on the outer surface of the plug frame 11 from the both ends of the connecting portion 29 connected to the plug frame 11 so as to reach at least above the annular groove 23 described above. Is formed. The other points are the same as those in the first embodiment described above. However, as shown in FIG. 7, the closing film portion 12 of the lower plug body 10 is configured to be sufficiently separated from the flange portion 22. Therefore, when the tip of the insertion portion of the syringe is inserted into the slit 13 of the closing film portion 12, the slit 13
Is opened and pushed downward, but its slit 13
Does not contact the flange portion 22 on the endoscope 1 side. Therefore, the closure membrane part 12 having the slit 13 is prevented from being damaged, and the closure membrane part 12 is quickly restored.

When using the plug body 8 of the second embodiment and removing it as shown in FIG. 8, the knob 29 is pinched with a finger and pulled upward. Then, the cut groove 30 tears from the lower side to the upper side, and a part of the annular groove portion 23 is chipped in an arc shape. Therefore, the plug body 8 can be easily removed from the insertion port body 5. Other functions and effects are the same as those of the first embodiment described above.

FIG. 9 shows a third embodiment of the present invention. The third embodiment is an example applied to a medical tube introducer 31 such as a medical trocar for introducing a blood vessel catheter or the like into the body. Here, the medical pipe introducing tool 31 is composed of a substantially cylindrical main body 32 and a flexible tube 33 connected to the main body 32, and an insertion opening (base) 34 is formed at the rear end of the main body 32. . Then, the same plug body 8 as that of the first embodiment is fitted in the insertion port body 34. Further, a connection portion 37 having a passage 36 for injecting heparin physiological saline is provided on the side surface of the insertion main body 32 between the medical tubular body 35 and the flexible tube 33 to prevent thrombus from occurring. Has been. A liquid sending tube or the like can be connected to the connecting portion 37.

When using this medical tube introducer 31, a medical tube 35 such as a catheter is inserted through the slit 12 provided in the stopper 8 and further comprises an inner cavity of the main body 32. It is introduced into the living body through the passage and the flexible tube 33. Other than that, the function of the plug 8 is the same as that of the first embodiment.

10 to 14 show a fourth embodiment of the present invention. FIG. 10 shows the whole plug body 8 of the fourth embodiment, and FIG. 11 shows a plane cross section of the lower end portion thereof.

A plurality of notches 38 are formed at the lower end of the stopper frame 11 in the stopper 8, and further, the inner surface of the stopper frame 11 has a groove-like notch continuous with each notch 38 and extending in the vertical direction. The groove 39 is provided so as to reach above the annular groove portion 23 of the plug frame 11 described above.

On the other hand, another plurality of notches 40 are provided at the inner end of the insertion hole 28 formed in the upper end surface of the plug frame 11. A cut groove 41 is connected to each of the plurality of cut portions 40. The cut groove 41 is provided on the inner surface of the stopper frame 11 from the upper end surface thereof through the side wall portion to the lower end. FIG. 12 shows the notch 40 and the notch 41 having one end located therein. The other configurations are the same as those of the above-described embodiments, for example.

Next, an example of use of the fourth embodiment will be described. Insertion mouth
To remove the plug 8 attached to 34, push the plug 8 with a finger in a direction perpendicular to the long axis as shown in FIG. Then, a force is applied in a direction perpendicular to the long axis to the portion fitted with the insertion opening body 5, whereby the cut groove 38 from the cut portion 38 at the lower end is applied.
At the same time, the plug frame 11 begins to tear and the engaging portion with the insertion opening 5 expands. Therefore, the plug body 8 can be easily removed from the insertion port body 5. Also, as shown in FIG.
When the insertion portion of the syringe is inserted into the insertion hole 28 for the treatment instrument or the like on the upper end surface of the device and a large amount is moved to the front, rear, left and right, a force is applied to the end of the insertion hole 28, and the notch 40 at the end of the insertion hole 28 is applied. To the cut groove 41, the plug frame 11 tears and reaches the lower end.
As a result, a part of the plug frame 11 is dropped off, and the plug body 8 is inserted into the insertion port body 5.
Can easily come off.

In the fourth embodiment, since no knob portion or the like is provided, the knob does not interfere when using the treatment tool. Further, when detaching, any portion can be pushed to be detached, so there is no need to find the knob portion.

Conventionally, when a syringe is inserted into the slit of the stopper and moved back and forth and left and right, the slit is often pinched and damaged by the insertion opening and the syringe.In severe cases, the slit is cut and the section falls into the channel. However, according to the fourth embodiment, it is safe because the plug frame 11 is broken and comes off the insertion port body 5 before such a situation occurs. Others are the same as those in the first embodiment.

The present invention is not limited to the above embodiment. Further, it may be applied to a plug body attached to an insertion opening body of an electronic endoscope. This type of electronic endoscope incorporates an image pickup device, such as a solid-state image pickup device, in its insertion portion, sends a signal from the image pickup device to a video processor through a signal line, processes the image signal with the video processor, and displays the image on a TV monitor. It is supposed to be projected as.

[Effects of the Invention] According to the present invention as described above, since the plug body is connected to the attachment mouthpiece by the plug frame formed of a relatively hard material such as plastic, the plug body is securely attached. be able to. Moreover, once attached, the plug cannot be removed without destroying it. However, the stopper frame is provided with a thin-wall portion for breaking for detachment, so that it can be easily detached by breaking it. Also, once removed, a part of the stopper will be damaged and cannot be reused, and it will be replaced with a new one after each use, so an inspection performed using a medical instrument with this stopper attached. The accuracy of the infection can be increased and the risk of infection can be eliminated.

[Brief description of drawings]

1 to 5 show a first embodiment of the present invention. FIG. 1 is a sectional view showing a state in which a plug is attached to an attached portion, and FIG. 2 is an exploded view of parts of the plug. Fig. 3 is a perspective view showing a sectional view taken along the line A-A in Fig. 1, Fig. 4 is a perspective view when the stopper is removed, and Fig. 5 is a side view of an endoscope using the stopper. Is. 6 to 8 show a second embodiment of the present invention, FIG. 6 is a perspective view of the stopper, FIG. 7 is a cross-sectional view with the stopper attached, and FIG. 8 is a stopper. It is a perspective view when removing a body. FIG. 9 is a side sectional view of the third embodiment of the present invention. 10 to 14 show a fourth embodiment of the present invention, FIG. 10 is a perspective view of the stopper, FIG. 11 is a plan sectional view of the stopper, and FIG. 12 is a view of the stopper. FIG. 13 is an enlarged perspective view of an essential part of the upper surface portion, FIG. 13 is a perspective view when the plug is removed, and FIG. 14 is a perspective view when the plug is removed. DESCRIPTION OF SYMBOLS 1 ... Endoscope, 5 ... Insert body, 8 ... Plug body, 9 ... Upper plug body,
10 ... Lower plug body, 11 ... Plug frame, 23 ... Annular groove, 24 ... Tapered portion,
25 ... notch groove, 27 ... notch groove, 30 ... notch groove, 39 ... notch groove, 40 ... notch part, 41 ... notch groove.

Claims (1)

[Claims] 1. A plug body for a medical device, which is attached to a base of a medical device and is used for closing a mouth part of the base, wherein a main body of an elastic member is replaced with a plug frame made of a relatively hard material. It is characterized in that the stopper frame is provided with an engaging portion that engages with the mouthpiece side of the medical device and a thin-wall portion for breaking for breaking the stopper frame into a state in which it cannot be reused when the stopper is removed. A plug for medical equipment.