JPH0549597A - Valve apparatus for medical apparatus - Google Patents

Abstract

PURPOSE:To allow application without leakage by even for 2 object to be inserted having a weak part such as bending part. CONSTITUTION:A valve apparatus body 5 is provided with an elastic member 5 for sealing which is positioned on the rear end side from a stop cock 8 for opening or closing a path 6 to allow the selection of an opening state at which it is retreated from the outer circumferential surface of an inserting member and a sealing state at which it gets close on the outer circumferential surface of the inserting member to seal a gap between the outer surface of the inserting member and the path 6. A valve housing 16 is provided to set up the opening state and the sealing state by deforming the elastic member 15. Furthermore, a distance L between setting positions of the stop cock 8 and the elastic member 15 for sealing is made larger than the distance (1) to the rear end of a soft thin film part from the tip of the inserting member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical instrument for use in, for example, a catheter to be inserted into a blood vessel or a forceps channel inlet of an endoscope to prevent leakage of blood and dirt to the outside. Regarding the valve device.

[0002]

2. Description of the Related Art Through the lumen of a catheter inserted into a blood vessel, an insertion portion of a blood vessel endoscope or an insert such as a thinner catheter is introduced into the blood vessel. In this case, in order to prevent blood from leaking from the entrance of the catheter to the outside through the lumen of the catheter previously inserted into the blood vessel, a sealing valve is attached to the entrance of the catheter. There is.

Generally, this type of valve is of a type in which a slit-shaped cut is formed in an elastic film made of rubber or the like, and an insertion portion of an endoscope or an insert such as a thin catheter is introduced through the cut. The cut formed in this elastic film is normally elastically sealed and also opens when an insert such as an endoscope or catheter is inserted, but at this time also, the gap is sealed to prevent leakage. prevent.

Also known is a system in which a ring-shaped O-ring packing is used in place of the elastic membrane having a cut, and the packing is crushed to seal a gap between the insert and the insert. (See Japanese Utility Model Publication No. 59-10967).

[0005]

However, the above-mentioned prior art example has the following problems. First, in a system in which a slit-shaped cut is formed in an elastic film, when inserting an insert such as an insertion portion of an endoscope through the cut, the cut must be spread at the tip of the insertion portion. In an endoscope in which a curved portion is provided on the distal end side of the insertion portion, the outer tube of the curved portion is made of a very soft thin rubber film, etc. Due to the frictional force, the outer skin tube of the curved portion is wrinkled, which makes it difficult to insert the outer skin tube, and the outer skin tube is likely to be torn. Further, in the case of an insert such as a catheter having a balloon attached to the distal end portion of the insert portion, it is difficult to insert the insert for the same reason.

On the other hand, in the system using the ring-shaped O-ring packing, as described above, after inserting the insertion portion of the endoscope or the insert such as the catheter into the blood vessel, the packing is crushed. Since the gap between the insert and the insert is sealed, the packing cannot be crushed at a weakened portion such as a curved portion, and the weakened portion such as a curved portion is introduced into the blood vessel. Could not prevent blood leakage.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to prevent leakage of blood, dirt, etc. even in an insert having a weak portion such as a curved portion. It is intended to provide a valve device for a medical instrument that can be used in the absence.

[0008]

In order to solve the above-mentioned problems, the present invention provides a medical instrument which is inserted into a living body and which has a passage through which an insert having a flexible thin film portion is inserted. In a valve device for a medical device attached to an inlet, a passage opening / closing means for opening / closing a passage of a valve device main body, and an open state for being retracted from an outer peripheral surface of the insert installed at a rear end side of the passage opening / closing means. An elastic member for sealing is provided which is in close contact with the outer peripheral surface of the insert and is capable of selecting a sealed state that seals the gap between the outer peripheral surface of the insert and the passage, and the elastic member is deformed to the open state. A means for operating in a sealed state was provided, and the distance between the passage opening / closing means and the installation position of the elastic member for sealing was made longer than the distance from the tip of the insert to the rear end of the flexible thin film portion.

[0009]

When inserting an insert into this valve device, the passage of the valve device main body is closed by the passage opening / closing means, and the elastic member for sealing is opened and then the insert is inserted. .. When the rear end of the flexible thin film portion of the insert has passed the position of the sealing elastic member, the elastic member is brought into a sealed state, and then the passage of the valve device main body is opened by the passage opening / closing means to further insert the insert. .. When removing the insert, reverse the procedure.

[0010]

1 to 4 show a first embodiment of the present invention. The valve device 1 according to this embodiment is attached to a luer taper type base 4 of a catheter 3 which is inserted through an insertion portion of an insert such as a blood vessel endoscope and a balloon catheter which will be described later. In FIG. 1, reference numeral 5 denotes a device body of the valve device 1, which is formed by a substantially cylindrical member.
The device body 5 is formed with a passage 6 for passing an insert to be inserted into the catheter 3 as a medical instrument. The inner diameter of the passage 6 is larger than the outer diameter of an insert that is passed through the passage 6, for example, the insertion portion of the angioscope or the insertion portion of the catheter.

A luer lock connector 7 is formed at the tip of the apparatus body 5. The luer lock connector 7 is detachably connected to the base 4 of the commercially available catheter 3. A stopcock 8 as a passage opening / closing means for opening / closing the passage 6 is provided in the rear portion of the device body 5 with respect to the luer lock connector 7.

The valve shaft 9 of the stopcock 8 penetrates perpendicularly to the passage 6 along the major axis of the apparatus body 5. In the portion of the valve shaft 9 that intersects with the passage 6, a through hole 10 having the same diameter as the inner diameter of the passage 6 is formed. A rotation operation lever 11 is provided on the upper end of the valve shaft 9. And this lever 1
By operating 1 to rotate the valve shaft 9, the direction of the through hole 10 is orthogonal to the passage 6 to close the passage 6 as shown in FIG. 1, and the through hole 10 as shown in FIG. It is possible to select a state in which the direction of the arrow coincides with the passage 6 and the passage 6 is opened.

A valve housing 16 is provided near the rear end of the apparatus main body 5 as a means for holding an elastic member 15 for sealing, which will be described later, and for deforming the elastic member 15 for sealing to open and seal. It is installed. That is, the valve housing 16 is made of a substantially cylindrical member, and the front end portion thereof is screwed into the screw portion 17 formed on the outer peripheral surface of the rear end portion of the apparatus main body 5 so as to be able to move back and forth. A flange portion 18 is formed at the rear end of the valve housing 16, and the ring-shaped sealing elastic member 15 is housed and held between the flange portion 18 and the rear end surface of the apparatus body 5.

The flange portion 18 is formed in the shape of a ring to form a hole 19, which is coaxial with the passage 6 and whose inner diameter is such that the insert can be inserted therethrough. Larger than the outer diameter of the object. Therefore, this hole 19
You can insert the insert from. As shown in FIG. 1, the sealing elastic member 15 is usually made of a ring-shaped elastic member having a circular cross section, and has an inner diameter that allows an insert to pass therethrough. The distance from the position of the stopcock 8 to the sealing elastic member 15 is L.

An insertion portion 21 of a general angioscope is shown in FIG. 3 as an example of the insert. The insertion portion 21 of the blood vessel endoscope has a distal end portion 2 via a bending portion 23 at the distal end of a flexible tube 22.
4 are connected to each other, and the bending portion 23 can be bent by a remote operation on the hand side operation portion.
The outer tube of the bending portion 23 is made of a very soft thin rubber film or the like, and for this reason, the bending portion 23 is a flexible thin film portion.

FIG. 4 shows an insertion portion 25 of a general balloon catheter as another example of the insert. The insertion portion 25 of this balloon catheter is composed of a flexible tube 26 as a whole, and a balloon 27 made of a very soft thin rubber film or the like is provided on the outer periphery of the distal end portion of the tube 26.
Is provided. The balloon 27 is made of a very soft thin rubber film or the like, which is the reason why it is a flexible thin film portion.

Here, in the insertion part 21 of the angioscope and the insertion part 25 of the balloon catheter as the respective inserts,
The distance from the tip to the rear end of the curved portion 23 and the attachment portion of the balloon 27 is l. Generally speaking, the distance from the tip of the insert to the rear end of the flexible thin film portion is l.

On the other hand, as shown in FIG. 1, the distance L from the position of the stop cock 8 to the sealing elastic member 15 is
It is set to be longer than the distance 1 from the tip of the insert to the rear end of the flexible thin film portion.

Next, the operation of the valve device 1 in use will be described. The luer lock connector 7 is connected to the luer taper type mouthpiece 4 of the catheter 3 to connect the device body 5. In addition, the through hole 10 in the valve shaft 9 of the stopcock 8 has the passage 6
Rotate the lever 11 so that it is orthogonal to
The passage 6 is closed. In this state, the catheter 3 is inserted into the blood vessel. Blood which is about to leak to the outside through the catheter 3 is blocked by the stopcock 8 and does not leak to the outside.

When the endoscope or catheter insertion portions 21 and 25 are introduced into the catheter 3 through the valve device 1,
First, the valve housing 16 is rotated and retracted so that the sealing elastic member 15 is not crushed, and then the inside of the passage 6 of the apparatus main body 5 is adjusted to such an extent that the tip of the insert hits the valve shaft 9 of the stopcock 8. Insertion parts 21, 2 of the insert
Insert 5 At this time, the sealing elastic member 15
Since the inner diameter is larger than the outer diameters of the flexible portion of the curved portion 23 and the balloon 27, it can be inserted without resistance.

Then, as shown in FIG. 2, the valve housing 16 is rotated and moved forward, and the sealing elastic member 15 is crushed between the flange portion 18 thereof and the rear end surface of the apparatus main body 5. The inner hole surface of the elastic member 15 for use is in close contact with the outer peripheral surfaces of the flexible tube 22 and the tube 26 in the insert,
The gap between them is sealed. That is, the sealing elastic member 1
The passage 6 is sealed at 5.

Thereafter, as shown in FIG. 2, the lever 11 of the stopcock 8 is rotated to align the direction of the through hole 10 with the axis of the passage 6 to open the passage 6. At this time,
Blood flows from the catheter 3 through the passage 6 to the vicinity of the rear end of the device main body 5, but since this portion is sealed by the elastic member 15, it does not leak outside.
Further, the air accumulated between the stop cock 8 and the elastic member 15 weakens the sealing force of the elastic member 15 and is discharged. Then, by pushing the insert, the insert is introduced into the blood vessel through the catheter 3. It should be noted that when removing the insertion portion of the insert, the procedure may be reversed from the procedure described above.

According to the above construction, however, the flexible thin film portion such as the curved portion 23 of the insertion portion 21 of the angioscope and the balloon 27 of the insertion portion 25 of the balloon catheter is strongly rubbed with the valve portion. Never. Therefore, the flexible thin film portion of the insert can be easily inserted without damaging or making the insertion difficult. In addition, since blood does not leak outside from the insertion of the insert to the removal of the insert, the patient is less invaded and the operative field can be kept clean.

FIG. 5 shows another example. This is obtained by adding the following configuration to that of the first embodiment. That is, the cylindrical pressing member 31 is provided at the rear end of the apparatus body 5.
Are installed in series. The holding member 31 has a circumferential groove 32 formed on the outer periphery thereof, and the flange portion 18 of the valve housing 16 is engaged with the circumferential groove 32. And
By advancing the valve housing 16, the pressing member 31 is advanced by the flange portion 18, and the elastic member 15 for sealing described above can be crushed by the front end of the pressing member 31.

A valve member 35 made of an elastic material and fitted with a film 34 having a round hole 33 is fitted and attached to the rear end of the pressing member 31. The round hole 33 portion of the membrane 34 is in close contact with the outer periphery of the insert to seal this portion. The portion of the membrane 34 is fairly flexible and has a sealing property that hits the flexible thin film portion of the insert with a strength that does not damage it. A water supply cock 36 is provided in the apparatus body 5 in front of the stop cock 8. The base 4 of the catheter 3 and the device body 5 are connected by a screw-type fastening ring 37.

When using this, the stop cock 8 and the water supply cock 36 are closed and the elastic member 1 for sealing is used.
Leave 5 open. Where the insert has passed through the membrane 34,
Open the stopcock 8. At this time, blood is the membrane 3
It is blocked at the 4th part to prevent blood leakage. In this way, when the insert is introduced into the blood vessel and a treatment such as observation is desired, the elastic member 15 for sealing is crushed to provide a reliable seal capable of withstanding water supply at this position and hold the insert at this position. ..

Next, it is possible to open the water feeding cock 36 and feed the physiological saline into the blood vessel to secure the visual field. According to this configuration, since the sheathing film 34 is provided, the distance between the stopcock 8 and the sealing elastic member 15 can be made shorter than the above l.

6 to 7 show, for example, an angioscope 40.
3 shows an example of a protective tube 42 made of elastic rubber that protects the ultra-fine and flexible insertion part 41 of FIG. The protective tube 42 is fitted over the insertion portion 41 during use or storage to prevent buckling or bending thereof. Protective tube 42
The base end connector part 43 of is formed thicker than other parts,
The shape of the inner hole 44 is elliptical as shown in FIG. In addition, the blood vessel endoscope 40 corresponding to the shape of the inner hole 44
The outer periphery of the proximal end connecting portion 46 of the insertion portion 41 of the operating portion 45 is also formed in an elliptical shape as shown in FIG. 7.

The outer diameters of the proximal end connector portion 43 of the protective tube 42 and the proximal end connecting portion 46 of the angioscope 40 are also smaller in the latter case. When the directions of the long axis and the short axis are aligned with each other, the loose fitting state is obtained as shown in FIG. Also, the long axis,
When the directions of the minor axes are reversed, the major axis and the minor axis are engaged with each other as shown in FIG. 7B.

The proximal end connector portion 43 of the protective tube 42 and the proximal end connection portion 46 of the angioscope 40 are rotated relative to each other to bring them into the disengaged state shown in FIG. The engagement state shown in (b) can be selected. Therefore, the protection tube 42 can be easily attached to and detached from the blood vessel endoscope 40 by a rotating operation. The proximal end connector portion 43 of the protection tube 42 and the blood vessel endoscope 40
An index may be attached to the outer surface of the base connecting portion 46 so that the positional relationship with the base connecting portion 46 can be understood.

Similarly to the above, FIG. 8 relates to the protective tube 51, which is fitted to the proximal end connecting portion 53 of the endoscope 52 to protect the insertion portion 50 of the endoscope 52. A porous member 55 having air permeability is provided on the fitting inner surface of the connector portion 54. With such a configuration, even when the protective tube 51 is attached to the endoscope 52, ventilation can be performed through the porous member 55 at the fitting portion of the proximal end connector portion 54 thereof. Therefore, this protective tube 5
When the endoscope 1 is mounted and the endoscope 52 is gas-sterilized, the fitting surface can be sterilized through the porous member 55. Further, the sterilizing gas can be introduced into the protective tube 51 through the porous member 55 to enhance the sterilizing action.

FIG. 9 shows an example in which the protective tube 62 is attached to the insertion portion 61 of the endoscope 60, and these are fitted and retained in predetermined positions of the storage groove 64 of the tray 63, and a fixture 65 incorporated in the tray 63. For example: This fixture 65
Is formed by an elastic member made of sponge,
Further, a groove portion 69 for fixing the base end connector portion 67 of the protection tube 66 in a state where the base end connector portion 67 of the endoscope 60 is removed from the base end connection portion 68 of the insertion portion 61 is formed. Fixture 6
When the protective tube 66 is fixed to the groove 69 of No. 5, the other endoscope 60 is fixed to the storage groove 64 of the tray 63. By fixing in this way, the protective tube 66 is separated and fixed from the endoscope 60, so that sterilizing gas can enter through the opening portion and sterilization leakage can be surely prevented.

[0033]

As described above, according to the present invention, it is possible to insert the flexible thin film portion of the insert easily without rubbing the sealing elastic member strongly. Also, it is possible to prevent leakage from the part of the valve from the start of insertion of the insert until it is removed, for example, the invasion of the patient due to leakage of blood is small,
In addition, the operative field can be kept clean.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a valve device for a medical device according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the medical device valve apparatus according to the first embodiment of the present invention in different operating states.

FIG. 3 is a side view of the insertion portion of the blood vessel endoscope.

FIG. 4 is a side view of the insertion portion of the balloon catheter.

FIG. 5 is a cross-sectional view of another medical device valve device.

FIG. 6 is an explanatory diagram of an insertion portion of an endoscope and a protection tube attached to the insertion portion.

7A and 7B are cross-sectional views of a fitting portion of a protective tube.

FIG. 8 is an explanatory diagram of an insertion portion of an endoscope and a protection tube attached to the insertion portion.

FIG. 9 is an explanatory diagram of a tray that holds an endoscope and a protection tube attached to the endoscope.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Valve device, 3 ... Catheter, 4 ... Cap, 5 ... Device main body, 6 ... Passage, 8 ... Stopcock, 15 ... Sealing elastic member, 16 ... Valve housing, 21 ... Vessel endoscope insertion part, 23 ... curved part, 25 ... insertion part of balloon catheter, 27 ... balloon, l ... distance, L ... distance.

Claims (1)

[Claims] 1. A valve device for a medical instrument, which is inserted into a living body and is attached to an inlet of the passage in a medical instrument having a passage through which an insert having a flexible thin film portion is inserted, A valve device main body having a passage for insertion, and a passage opening / closing means for opening / closing the passage of the valve device main body,
The open state, which is installed at the rear end side of the passage opening / closing means and is retracted from the outer peripheral surface of the insert, and the outer peripheral surface of the insert are closely contacted to seal the gap between the outer peripheral surface of the insert and the passage. A sealing elastic member capable of selecting a sealing state and a means for deforming the elastic member to operate the opening state and the sealing state are provided, and between the passage opening / closing means and the installation position of the sealing elastic member. The valve device for a medical instrument, wherein the distance is made longer than the distance from the tip of the insert to the rear end of the flexible thin film portion.