JPH1099440A - Catheter device and priming apparatus for it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a priming apparatus for catheter and a catheter device equipped with such priming apparatus with which it is practicable to perform the priming of the internal lumen of catheter easily and certainly. SOLUTION: A priming apparatus 2 is for a catheter 3 equipped with a lumen opening at the tip and the base end. The apparatus 2 allows insertion of catheter with the tip leading and is equipped with a catheter fixture 4 capable of being removably attached to the catheter (catheter tube 31) liquid-tightly, a tubing 5 whose one end is connected with the fixture 4, and a liquid injector connected with the other end of the tubing 5. The catheter device 1 consists of the priming apparatus 2 and the catheter 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a priming device for a catheter for filling a liquid such as a physiological saline into a catheter having a lumen therein, and a catheter device provided with the priming device.

[0002]

2. Description of the Related Art Conventionally, many in-vivo catheters have been used. Many catheters have a lumen inside. Examples of such a catheter include, for example, an ultrasonic catheter for observing an ultrasonic image in a body cavity such as an organ such as a vascular system or a digestive organ, a percutaneous transluminal tube used for myocardial infarction or angina pectoris. There is a catheter for type coronary angioplasty (hereinafter, PTCA dilatation catheter) and the like. In use, these catheters require a priming operation to eliminate air in the lumen and replace it with a liquid. Such priming is performed to prevent air in the catheter from flowing into the body, and to prevent air from hindering the propagation of ultrasonic waves. Priming is usually performed by opening a port on the proximal side of the catheter and filling it with a syringe or the like from the port side, or by inserting a thin tube such as a syringe needle from the distal end side of the catheter and using a syringe or the like. There is a way to do it.

[0003]

However, there are cases where reliable priming cannot be performed by the above method.
In particular, in the former method, in the case where members such as an ultrasonic oscillation element, a drive shaft, and a signal line are provided inside such as an ultrasonic catheter, injection of a physiological saline solution or the like from the proximal port of the catheter causes The air passes through a number of structures before reaching the tip of the catheter where the sonic transducer is located, so it is highly possible that the air contains air as bubbles.
In addition, in the latter method, it is not easy to insert the injection needle into the opening at the distal end of the current catheter having a reduced diameter, and the usable injection needle also has a small diameter. It takes time, and the workability is poor because the injection needle must be inserted and held.
An object of the present invention is to provide a priming device for a catheter and a catheter device provided with the priming device, which can easily and surely prime the inner lumen of the catheter.

[0004]

What achieves the above object is a priming device for a catheter having a lumen opened at a distal end portion and a proximal end portion, wherein the catheter can be inserted from the distal side, A catheter fixture that is detachable and liquid-tightly attachable to the catheter, and a tubular body having one end connected to the catheter fixture,
And a liquid injector connected to the other end of the tubular body. The catheter fixing device is a tubular fixing device main body, an elastic member that is inserted into the fixing device main body and has a through hole through which a catheter can be inserted, and is movable in the axial direction of the fixing device main body. Yes,
Preferably, a compression member is provided for compressing the elastic member so that the diameter of the through hole of the elastic member becomes small. Further, the catheter fixing device may include a second tubular member extending to a side opposite to the tubular body connection side. Further, in the catheter, the distal end portion is a flexible portion, and the proximal end side from the distal end portion is a main body portion having higher rigidity than the distal end portion.The priming device includes the elastic member and the elastic member. It is preferable that the entirety of the distal end of the catheter and a part of the main body are housed between the other end of the tubular body.

In order to achieve the above object, a catheter having a lumen opened at a distal end and a proximal end and a first cap detachably attached to the proximal end opening, Is inserted from the distal end side, a catheter fixture detachably attached to the catheter in a liquid-tight manner, a tubular body having one end connected to the catheter fixture, and a liquid connected to the other end of the tubular body. A priming device comprising an injecting device or a second cap. Then, the inside of the lumen and the inside of the priming device may be filled with a liquid. Further, the catheter fixing device has a tubular fixing device main body, an elastic member inserted into the fixing device main body and having a through hole through which a catheter can be inserted, and a movable member in the axial direction of the fixing device main body. Preferably, a compression member is provided for compressing the elastic member so that the diameter of the through hole of the elastic member becomes small. Further, the catheter fixture may include a second tubular member extending to the other end.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a priming device for a catheter according to the present invention; FIG. 1 is an external view of a catheter device with a priming device of the present invention attached. FIG. 2 is an external view of a catheter fixture used in the priming device of the embodiment of the present invention. FIG.
FIG. 3 is a sectional view taken along line AA of the catheter fixture shown in FIG. 2. FIG. 4 is an explanatory view showing a state where the priming device of the present invention is attached to a catheter. FIG. 5 is a cross-sectional view of the catheter device of the present invention with a priming device attached.

The priming device 2 includes a catheter device 1.
And a catheter 3. The catheter 3 has a catheter tube 31 and a branch hub 32 fixed to a proximal end of the catheter tube 31. Catheter tube 3
1 has an opening (not shown) at the tip, and has a lumen communicating with this opening inside. The lumen is the branch hub 3
2, and the rear end is opened by the port 32a. As the catheter 3, an ultrasonic catheter, a thermodilution catheter, a PTCA catheter or the like having a lumen inside is used. In this embodiment, the distal end of the catheter is a flexible portion, and the proximal end side of the distal end is a main body having higher rigidity than the distal end. In addition, as a catheter,
The tip may have a small diameter and the main body may have a larger diameter than the tip.

[0008] The priming device 2 is for a catheter 3 having lumens open at the distal and proximal ends. The priming device 2 is configured such that a catheter can be inserted from the distal end side, and is connected to a catheter fixture 4 that can be attached to and detached from the catheter (catheter tube 31) in a liquid-tight manner, and to one end of the catheter fixture 4. A tubular body 5 and a liquid injector 6 connected to the other end of the tubular body 5 are provided. The priming device 2 includes a catheter fixture 4, a tubular body 5, and a liquid injector 6 as shown in FIG. In the priming device 2 of this embodiment, the catheter fixture 4, the tubular body 5, and the liquid injector 6 can be separated from each other. The priming device of this embodiment has a size and a length capable of accommodating the above-mentioned flexible distal end portion of the catheter and a part of the main body portion.

As shown in FIGS. 2 and 3, the catheter fixing device 4 includes a cylindrical fixing device main body 41 and a fixing device main body 41.
Elastic member 43 having a through-hole 43a inserted therein and through which a catheter (catheter tube 31) can be inserted.
And a compression member 42 that is movable in the axial direction of the fixture body 41 and compresses the elastic member 43 so that the diameter of the through hole 43a of the elastic member 43 becomes small.

The main body 41 of the cylindrical fixture has a small-diameter passage 41 a having a diameter at which the catheter tube 31 can be inserted at the front end side, and the rear end side has a large diameter. The pressing portion 46 is formed so as to be housed. And
An elastic member 43 having a through hole 43a through which the catheter tube 31 can be inserted is accommodated in the center. The through hole 43a of the elastic member 43 communicates with the passage 41a. Further, a screw thread 45 is formed on the outer surface on the base end side. The screw thread 45 is screwed with a screw groove 48 formed in the compression member 42 described later. At the distal end of the fixture main body 41, a connecting protruding portion 4 with a tubular body 5 protruding in a cylindrical shape is provided.
5b, and a tubular covering portion 44 provided so as to cover the cylindrical projecting portion 41b. A spiral rib 44a is formed on the inner surface of the tubular envelope. The rib engages with a rib formed on a hub fixed to one end of the tubular body 5 described later, and prevents the tubular body hub 52 from being detached.

The compression member 42 is provided with a passage 42a in the center thereof through which the catheter tube 31 can be inserted.
An operation part 42b formed in a polygonal column shape;
b, a cylindrical pressing portion 46 for projecting from the center portion toward the distal end and pressing and compressing the elastic member 43;
Is provided. The cylindrical pressing portion 46 has an outer diameter or a shape that can enter the base end side (increased diameter portion) of the fixture body 41. On the inner surface of the tubular projecting portion 47, a screw groove 48 to be screwed with the screw thread 45 formed on the fixing tool main body 41 is formed. For this reason, by rotating the operation part 42b, as shown in FIG. 4, the screwing of the fixing member main body 41 and the compression member 42 progresses, and the compression member 42 (the pressing part 46) It moves to the tip side, and the tip of the pressing portion 46 compresses and deforms the elastic member 43.

The pressing portion 46 compresses the elastic member 43 and deforms the diameter of the through hole 43a to a small diameter so that the space between the outer surface of the catheter tube 31 and the elastic member 43 is made substantially liquid-tight. The shape is not limited to the cylindrical shape as described above, and may be a polygonal cylindrical shape, or may be a plurality of rods extending to the distal end side from the operation portion 42b.

The elastic member 43 has a through hole 43 at the center.
A cylindrical shape having a is preferable, and the thickness in a non-compressed state is about 2 to 3 mm, and the diameter of the through-hole 43a is
It is preferably about 1.5 to 2 times the outer diameter of the catheter tube 31 to be used. Examples of a material for forming the elastic member 43 include rubbers such as silicone rubber, latex rubber, butadiene rubber, chloroprene rubber, and urethane rubber;
Elastomers such as styrene-based elastomers (for example, styrene-butadiene copolymer, styrene-butadiene-styrene copolymer) and polyolefin elastomers (for example, polypropylene elastomer) can be used.

Further, as shown in FIG. 8, the compression member 42 may be provided with a tubular member 7 extending on the side opposite to the tubular body connection side (the side facing the rear end of the catheter when used).
By providing such a tubular member, it is possible to prevent the catheter from being bent near the end of the catheter fixture 4. In particular, it is preferable to use a member having some flexibility as the tubular member 7. Further, the rear end of the tubular member 7 is formed as a tapered portion 7a having an enlarged diameter so that insertion of the distal end of the catheter becomes easier.

As shown in FIG. 5, the tubular body 5 includes a tube 51, a catheter fixing device connecting hub 52 fixed to one end of the tube 51, and a liquid injecting device connecting hub 53 fixed to the other end. Consists of The tube 51 is preferably formed of a flexible material, and is further preferably transparent. As the tube forming material, a rubber, an elastomer, and a flexible material such as a soft vinyl chloride resin, a polyolefin (for example, polypropylene), a polyamide, and a polyester, which are described above, are preferable. It may be a body. It should be noted that the tubular body 5 may be integrally formed including a hub portion. As described above, as the catheter, a distal end portion is a flexible portion, and a proximal end side from the distal end portion is a main body having higher rigidity than the distal end portion. Can accommodate the entire distal end portion and a part of the main body portion of the catheter between the elastic member and the other end of the tubular body (the hub 53 for connecting a liquid injector).

As the liquid injector 6, a syringe can be used. The liquid injector 6 includes an outer cylinder 61 and a plunger 62, as shown in FIGS. As shown in FIG. 5, the liquid injector 6 is particularly preferably provided with a mechanism for preventing the liquid injector connection hub 53 of the tubular body 5 from coming off. The hub disengagement prevention mechanism includes a tubular covering portion 63 provided to cover a connecting protrusion 64 formed on the distal end portion of the outer cylinder 61 and connecting to a hub 53 projecting in a cylindrical shape. It is constituted by a spiral rib 65 formed on the inner surface of the wrapping portion 63. The rib 65 is engaged with a rib formed on the hub 53 to prevent the tubular body 5 from being detached from the hub 53. The plunger 62 has a gasket 66 that slides in the outer cylinder 61 in a liquid-tight manner at the tip. Note that the liquid injector 6 is not limited to such a syringe,
A liquid injection device provided with a pressure gauge used for a TCA catheter or the like may be used. Further, the form of the catheter fixture is not limited to those described above. For example, the configuration shown in FIGS. 6 and 7 may be used.

The basic structure of the catheter fixture 20 is as follows.
This is the same as that of the above-described embodiment, and the only difference is the engagement relationship between the fixture main body 21 and the compression member 22, and only the differences will be described. In this catheter fixing device 20, two outwardly projecting ribs 21a and 21b are provided on the outer surface of the proximal end portion of the fixing device main body 21 instead of the screw thread 45 and the screw groove 48 as in the above-described embodiment. Formed and compressed member 22
Are formed with two slits 22a and 22b for slidably storing the ribs. Locking grooves extending in the outer peripheral direction of the tubular protrusion are formed at both ends of the slit.

Before insertion of the catheter, it is in the state shown in FIG. 3. In use, by slightly rotating the compression member 22, the rib 21a comes out of the lock groove, and in this state, the compression member is moved to the distal end side. , The rib 21a moves in the slit 22a, the pressing part also moves to the tip side, and the elastic member 4 is moved by the pressing part of the compression member.
3 is compressed and deformed. When the rib 21a reaches the end of the slit 22a, the compression member 22 is fixed to the fixture body 21 by slightly rotating the compression member in a direction opposite to the unlocking direction. The compression state of 43 is maintained. In the priming device 2 of the above-described embodiment, the catheter fixing device 4, the tubular body 5, and the liquid injecting device 6 are of a type that can be separated from each other. However, the present invention is not limited to this, and all are fixed. Alternatively, only the catheter fixture 4 and the tubular body 5 may be fixed.

Next, a method of using the priming device 2 of the present invention will be described with reference to FIGS. The priming liquid is filled in the liquid injector 6.
Then, the liquid injector connection hub 53 of the tubular body 5 is connected to the liquid injector 6, and the catheter fixture connection hub of the tubular body 5 is connected to the catheter fixture 4. Thereby, the priming device 2 of the present invention is assembled. In this state, the catheter fixture 4 is in the state shown in FIG. 3, and the elastic member 43 in the catheter fixture 4 is not compressed. Next, push the plunger of the liquid injector 6,
The entire priming device 2 of the present invention is filled with a priming liquid. The filling is completed when the priming liquid flows out from the rear end side of the catheter fixture 4. Then, a catheter (catheter tube 31) is inserted into the catheter fixture (the priming device 2) from the distal end side from the rear end side of the catheter fixture 4, and the distal end of the catheter enters the inside of the tubular body 5. The catheter is provided with various mechanisms (for example, an ultrasonic element in the case of an ultrasonic catheter, a balloon in the case of a PTCA catheter, and a thermistor in the case of a thermodilution catheter) at the distal end or inside thereof, Furthermore, many catheters have a portion that is more flexible than the distal end in order to facilitate advancement into the living body. In consideration of this point, the various mechanical parts of the catheter do not come into contact with the elastic member 43, and further, the distal end portion of the catheter that is a flexible portion does not come into contact with the elastic member 43, in other words, the distal end. The catheter 3 is inserted until a part of the main body of the catheter having a higher rigidity than the part (for example, a distal end portion of the main body) is located in the elastic member. Then, the compression member 42 of the catheter fixture 4 is rotated, and the elastic member 43 is compressed and deformed by the pressing portion of the compression member 42 to make the elastic member 43 adhere to the catheter tube 31 in a liquid-tight manner. Is fixed to the catheter fixture 4 (priming device 2). This state is the state shown in FIG.

The port 3 of the hub 32 of the catheter
If cap 33 is attached to 2a (which communicates with the lumen in the catheter), remove the cap. When the plunger of the liquid injector 6 is pushed, the pressure of the priming liquid in the tubular body 5 increases, and the priming liquid flows into the lumen of the catheter from the opening of the catheter located in the tubular body 5. I do. The air in the lumen is pushed out by the liquid flowing into the lumen of the catheter, and is discharged from the port 32a. When all the air in the lumen is pushed out, the liquid flows out of the port 32a. Then, cap 3 is attached to port 32a.
3 is attached. Thus, the priming operation ends. This state is the state shown in FIG.

Next, the catheter device of the present invention equipped with a priming device will be described. The priming device and catheter are as described above. A catheter device 1 according to the present invention includes a catheter 3 including a lumen opened at a distal end portion and a proximal end portion, and a first cap 33 detachably attached to a proximal end opening (port 32a); Is inserted from the distal end side, and a catheter fixture 4 detachably and liquid-tightly attached to the catheter 3, a tubular body 5 connected to one end of the catheter fixture 4, and a second end of the tubular body 5. And a priming device 2 comprising a connected liquid injector 6 or a second cap (cap 71 in FIG. 9). That is, as shown in FIG. 1 or as shown in FIG. 9, the cap 71 is attached instead of the liquid injector 6. In this state, the entire distal end of the catheter is housed in the priming device, and the elastic member is almost liquid-tightly adhered to the distal end of the main body of the catheter tube. Therefore, the priming operation can be started by preparing the liquid injector 6 filled with the priming liquid, or removing the liquid injector 6, filling the priming liquid, and connecting the liquid again.
Preparation work is extremely easy.

Further, the inside of the catheter device provided with the priming device 2 may be filled with a priming liquid. As the priming liquid,
Physiological saline, sterile water and the like can be used. The term “filling the priming liquid” refers to a state in which the inside of the catheter is primed. In this case, the liquid injector 6 may be directly attached,
, And a cap 71 may be attached to the hub 53 of the tubular body 5 as shown in FIG. In addition, a cap is attached to the port 32a to prevent the liquid from flowing out. In this way, by performing priming in advance, the catheter can be used only by removing the priming device 2. In addition, as the priming device in the catheter device to which the priming device is attached, any of the above-described embodiments can be used.

[0023]

The priming device for a catheter according to the present invention is a priming device for a catheter having a lumen opened at a distal end portion and a proximal end portion. The priming device is capable of inserting the catheter from the distal end side. Since it comprises a catheter fixture that can be detachably attached and liquid-tightly attached, a tubular body connected to one end of the catheter fixture, and a liquid injector connected to the other end of the tubular body, The priming solution can be easily and reliably injected from the distal end side of the catheter.

[Brief description of the drawings]

FIG. 1 is an external view of a catheter device with a priming device of the present invention attached.

FIG. 2 is an external view of a catheter fixture used in the priming device according to the embodiment of the present invention.

FIG. 3 is a view showing A- of the catheter fixture shown in FIG. 2;
FIG. 3 is a sectional view taken along line A.

FIG. 4 is an explanatory view showing a state where the priming device of the present invention is attached to a catheter.

FIG. 5 is a cross-sectional view of the catheter device of the present invention with a priming device attached.

FIG. 6 is an external view of a catheter fixture used in a priming device according to another embodiment of the present invention.

FIG. 7 is a cross-sectional view of the catheter fixture shown in FIG.
It is a B sectional view.

FIG. 8 is a sectional view of a priming device according to another embodiment of the present invention.

FIG. 9 is a cross-sectional view of a catheter device according to another embodiment of the present invention with a priming device attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Catheter apparatus 2 Priming device 3 Catheter 4 Catheter fixture 5 Tubular body 6 Liquid injector 41 Fixture main body 42 Compression member 43 Elastic member

Claims (8)

[Claims] 1. A priming device for a catheter having a lumen opened at a distal end and a proximal end, wherein the priming device can be inserted from the distal side, and can be detachably and liquid-tightly attached to the catheter. A priming device for a catheter, comprising: a catheter fixing device, a tubular body having one end connected to the catheter fixing device, and a liquid injector connected to the other end of the tubular body. 2. The catheter fixing device according to claim 1, wherein the catheter fixing device includes a tubular fixing device main body, an elastic member inserted into the fixing device main body, and having a through hole through which a catheter can be inserted. The priming device for a catheter according to claim 1, further comprising a compression member that is movable and compresses the elastic member so that the diameter of the through hole of the elastic member becomes small. 3. The priming device for a catheter according to claim 1, wherein the catheter fixture includes a second tubular member extending to a side opposite to the tubular body connection side. 4. The catheter according to claim 1, wherein a distal end portion is a flexible portion, and a proximal end side from the distal end portion is a main body portion having higher rigidity than the distal end portion. The catheter according to any one of claims 1 to 3, wherein the entire distal end portion and a part of the main body portion of the catheter can be stored between a member and the other end of the tubular body. Priming equipment. 5. A catheter having a lumen opened at a distal end and a proximal end, a first cap detachably attached to the proximal end opening, and a catheter housed from the distal end side, A catheter fixture detachably attached to and liquid-tight with respect to, a tubular body having one end connected to the catheter fixture, and a liquid injecting device or a second cap connected to the other end of the tubular body. And a priming device comprising: 6. The catheter device according to claim 5, wherein a liquid is filled in the lumen and the priming device. 7. The fixing device according to claim 1, wherein the catheter fixing device includes a tubular fixing device main body, an elastic member inserted into the fixing device main body and having a through hole through which a catheter can be inserted, and an axial direction of the fixing device main body. The catheter device according to claim 5, further comprising: a compression member that is movable and compresses the elastic member so that the diameter of the through hole of the elastic member becomes small. 8. The catheter according to claim 1, wherein a distal end portion is a flexible portion, and a proximal end side from the distal end portion is a main body portion having higher rigidity than a distal end portion. The catheter device according to any one of claims 5 to 7, wherein the entire distal end portion and a part of the main body portion of the catheter are housed between a member and the other end of the tubular body.