JP4107837B2 - Artificial lung - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an artificial lung. More specifically, the present invention relates to an artificial lung in which the port position is optimized at the time of priming, extracorporeal circulation, and blood collection by making the artificial lung module rotatable.
[0002]
[Prior art]
As for the arrangement of each port of the oxygenator module, from the viewpoint of preventing bubble outflow during extracorporeal circulation, it is desirable that blood is not sent by flowing blood from the upper part to the lower part. For this reason, the blood inflow port is at an arbitrary position. Although good, the blood outflow port should be placed at the bottom. As a result, the priming operation that allows smoother flow from the lower part to the upper part is sacrificed.
[0003]
On the other hand, in an artificial lung where the blood inflow port and blood outflow port are located above the bottom of the module, blood remains between the bottom of the module and the port, and when collecting residual blood after extracorporeal circulation, It is necessary to remove the lung from the holder and tilt the oxygenator so that one of the ports is at the bottom and collect it.
[0004]
In extracorporeal circulation using an artificial lung, blood remaining in the artificial lung after extracorporeal circulation is collected from an artificial lung blood inflow port, an artificial lung blood outflow port, a cardioplegia port, or other dedicated port. In order to collect more residual blood in the oxygenator, it is desirable that these ports be installed at the bottom of the oxygenator.
[0005]
However, because these ports are at the bottom of the oxygenator, the extracorporeal circuit is not optimally routed, which can result in an increased blood filling volume including the oxygenator and the entire circuit.
[0006]
In particular, if the oxygenator blood outflow port is installed at the bottom, the blood supply circuit from outside the oxygenator to the patient may touch the floor and become unclean, and the oxygenator should be positioned high enough to avoid it. When it is installed in the case, inevitably, it becomes a limitation when it is desired to make the difference between the venous reservoir and the patient as large as possible.
[0007]
In order to optimize the blood circuit during extracorporeal circulation, it is necessary to provide a dedicated port for collecting residual blood at the bottom of the artificial lung and connect a branch tube to the end of the port. This adds to the amount of filling due to these not being needed at all during extracorporeal circulation.
[0008]
[Problems to be solved by the invention]
Accordingly, an object of the present invention is to provide a novel oxygenator.
[0009]
Another object of the present invention is to provide an oxygenator whose position is optimized during priming, extracorporeal circulation, and blood collection by making the oxygenator module pivotable.
[0010]
[Means for Solving the Problems]
The above objects are achieved by the following (1) to (4).
[0011]
(1) An artificial lung in which an oxygenator module portion is provided at a lower portion of a blood reservoir via a coupling portion , and the substantially cylindrical artificial lung is disposed at a lower portion of two support arms suspended from the coupling portion. The central axis of the module part is pivotally attached to both end surfaces, and at least a blood inflow port and a blood outflow port are provided in the artificial lung module part, and the blood outflow port is at the upper part during priming and at the time of extracorporeal circulation. An artificial lung characterized in that locking means for stopping the rotation of the artificial lung module unit is provided at an intermediate position so as to be positioned at the lowermost part when collecting blood .
[0012]
(2) In the above (1), the locking means includes a locking member provided on at least one end surface of the oxygenator module portion and a click member pivotally attached to the support arm. The described artificial lung.
[0013]
(3) the engaging member is the locking of the click member, so that the position of the blood outlet port provided in the artificial lung module unit is located at least the upper, the middle and lower, said oxygenator The oxygenator as described in said (2) provided in the end surface part of a module part .
[0014]
(4) the click member, said has a pivot point in the middle portion of the support arm, a first gripping member formed to protrude from the該枢attaching portion, a second that protrudes from the support arm The artificial lung according to (2) or (3), wherein the artificial lung is biased outward by a biasing means provided between the gripping member and the gripping member.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an oxygenator and its holder according to the present invention will be described with reference to the drawings.
[0016]
FIG. 1 is a schematic perspective view of an oxygenator according to the present invention, and FIGS. 2 to 4 show each stage in use of the oxygenator according to the present invention.
[0017]
As shown in these drawings, a substantially cylindrical oxygenator module portion 3 is pivotally attached to the lower portions of the two support arms 1 and 2 at the both end surfaces of the central shaft 4. For example, on both end faces of the oxygenator module part 3, a fixed shaft (not shown) protruding from the central axis is provided at the lower part of the support arms 1 and 2, for example, at the lower ends of the support arms 1 and 2. The artificial lung module unit 3 is held by the support arms 1 and 2 by being inserted into a hole (not shown) so as to be rotatable.
[0018]
On the other hand, a click member 5 is pivotally mounted between the support arms 1 and 2 to form a lever. A claw portion 5 a is provided at one end of the click member 5, and is locked to a locking member 7 a provided at one end of the oxygenator module portion 3. The click member 5 can be rotated around the pivoting portion 6, but a claw portion 5 a provided at the tip of the click member 5 is locked to the locking member 7 a. A spring is provided between the second gripping member 8 that protrudes from the intermediate portion of the support arms 1 and 2 and the first gripping member 9 that protrudes from the pivotal portion of the click member 5. When the first gripping member 9 and the second gripping member 8 are pressed against each other, the click member 5 is unlocked by the locking member 7a. .
[0019]
The oxygenator module 3 is provided with a blood outflow port 11, a blood inflow port 12, a purge line 16, a gas inflow port (not shown), a gas outflow port (not shown), and the like.
[0020]
The artificial lung module section 3, the blood chamber is formed by fixed at by Ri septum by inserting a large number of porous hollow fibers within a tubular housing potting agent between both the partition walls, from the outside of the both partition walls A gas such as air is supplied to flow through the hollow fiber, and in contact with the gas through the hollow fiber, gas exchange is performed. Moreover, what was integrated with the heat exchanger may be used.
[0021]
Next, the use state of the artificial lung according to the present invention will be described.
[0022]
First, as shown in FIG. 2, the claw portion 5a at the tip of the click member 5 is released by pressing the first and second gripping members 9 and 8 together so that the blood outflow port 11 is located at the upper part. Then, the artificial lung module part 3 is rotated, and when the blood outflow port reaches a desired position, it is locked at the locking member 7b. Next, priming is started at this position. In this case, since blood circulates from below to above, priming is facilitated.
[0023]
When priming is completed and blood is extracorporeally circulated, as shown in FIG. 3, the first and second gripping members 9 and 8 are pressed against each other to lock the click member 5a at the claw portion 5a. released, perform extracorporeal blood circulation blood inlet port 12 of the artificial lung module section 3 is rotated and the relatively lower the blood outlet port 11 is arranged so as to be located at the bottom. This prevents bubbles from flowing out and provides a position that is easy to use.
[0024]
Next, when the extracorporeal circulation of blood is completed, as shown in FIG. 4, the first and second gripping members 9 and 8 are pressed against each other to release the locking at the claw portion 7a of the locking member 5a, The artificial lung module unit 3 is rotated so that the blood outflow port 11 is positioned at the lowermost part, and the blood is discharged out of the system to collect the entire amount of blood including residual blood. This maximizes the amount of blood collected.
[0025]
A connecting portion 13 for connecting to the blood reservoir 17 is provided on the upper portions of the support arms 1 and 2.
[0026]
As a locking means for the support members 1 and 2 of the oxygenator module part 3, in addition to the combination of the click member 5 and the locking members 7a, 7b and 7c, a ratchet method, a hook-and-loop method, an insertion pin There are methods.
[0027]
For example, as a ratchet method, as shown in FIG. 5, in an artificial lung similar to that shown in FIGS. 1 to 4, locking gaps 18 a, 18 b, 18 c are provided on at least one surface of the artificial lung module unit 3. As described above, the locking member 20 is provided at the rotational position. On the other hand, at least one of the support arms 1 and 2 (the side where the locking gaps 18 a, 18 b, and 18 c are provided) is locked by the rotation shaft 19. And the locking claw 21 provided at the tip is locked.
[0028]
In this case, the locking member 20 is lifted and the oxygenator module part 3 is rotated to lock the blood outflow port 11 downward by locking at the next locking gap 18b. Can do. Furthermore, the blood outflow port 11 can be directed to the lowest position by rotating similarly.
[0029]
In the case of the hook-and-loop fastener method, the hook-and-loop fastener can be locked at an appropriate position. Further, even in the case of the insertion pin method, a pin (not shown) is inserted into at least one of the support members 1 and 2 and an insertion hole (not shown) is provided at an appropriate position of the oxygenator module 3. Thus, the position of the blood inflow port 11 can be changed.
[0030]
【The invention's effect】
As described above, the oxygenator according to the present invention is pivotally attached to the lower part of the two support arms so that the central axis of the substantially cylindrical oxygenator module is pivotable at both end surfaces. Since the blood outflow port provided at the upper part is positioned at the upper part at the time of priming, the lower part at the time of extracorporeal circulation, and the lowermost part at the time of blood collection, a locking means for stopping the rotation of the artificial lung module is provided. arrangement positions of the module unit, for example, when the blood outlet port is at the top during priming, priming is facilitated, also the blood outlet port is in an intermediate position during extracorporeal circulation, it prevents outflow of gas bubbles during extracorporeal circulation of blood, When the blood outflow port is located at the lowest position, the remaining blood can be collected to the maximum, so that the blood recovery rate is substantially 100. To become.
[Brief description of the drawings]
FIG. 1 is a perspective view of an oxygenator according to the present invention.
FIG. 2 is an enlarged side view showing the position at the time of priming without the blood reservoir of the oxygenator according to the present invention.
FIG. 3 is an enlarged side view showing a position during extracorporeal blood circulation in which the blood reservoir of the artificial lung according to the present invention is omitted.
FIG. 4 is an enlarged side view showing the position at the time of blood collection without the blood reservoir of the artificial lung according to the present invention.
FIG. 5 is an enlarged side view showing another embodiment in which the blood reservoir of the oxygenator according to the present invention is omitted.
[Explanation of symbols]
1, 2, ... support arms,
3 ... Artificial lung module part,
4, 6 ... Pivoting part,
5 ... Click member,
5a ... nail part,
7a, 7b, 7c ... locking member,
8, 9 ... gripping member 10 ... biasing means,
11 ... Blood outflow port,
12 ... Blood inflow port,
13: Coupling portions 14a, 14b, 14c with blood reservoirs: locking gaps,
15 ... locking member,
16 ... purge line,
17 ... Blood reservoir,
18a, 18b, 18c ... gap for locking,
19 ... rotating shaft,
20 ... locking member,
21: A locking claw.

Claims (4)

An oxygenator in which an oxygenator module part is provided via a coupling part at the lower part of the blood reservoir,
At least the blood flow into the lower part of the two support arms which are suspended from the coupling portion, the central axis of the substantially cylindrical the oxygenator module unit while rotatably pivoted at both ends face, in the artificial lung module unit A port and a blood outflow port,
Locking means for stopping the rotation of the oxygenator module portion is provided so that the blood outflow port is located at the upper part at the time of priming, at an intermediate position at the time of extracorporeal circulation, and at the lowest part at the time of blood collection. Feature artificial lung. 2. The oxygenator according to claim 1, wherein the locking means includes a locking member provided on at least one end surface of the oxygenator module portion, and a click member pivotally attached to the support arm. . The locking member, the locking of the click member, the position of the blood outlet port provided in the artificial lung module unit, at least the upper, so as to be positioned intermediate portion and a lower portion, the oxygenator module unit The oxygenator according to claim 2, which is provided on an end surface portion . The click member has a pivot point in the middle portion of the support arm, a first gripping member formed to protrude from the該枢attaching portion, a second gripping member which is formed to protrude from the support arm The artificial lung according to claim 2 or 3, wherein the artificial lung is urged outward by an urging means provided therebetween.

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