JPH0532129Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is applicable to the flow rate of body fluids or replacement fluids when the body fluids or replacement fluids are transferred through a pipe from the upper side to the lower part using gravity, that is, a drop. This invention relates to a device for adjusting.

(Prior art) In the medical field, body fluids or replacement fluids are
It is common practice to transfer material from above to below via a pipe, for example by utilizing a drop. That is, in the case of heart surgery, blood leaking around the patient's heart is transferred to an oxygenator (or an oxygenator reservoir) placed below the patient. In addition, for patients after surgery,
It is also common practice to supply replacement fluids such as Ringer's or blood for transfusion by using a drop.

As mentioned above, when transferring body fluids or replacement fluids, the amount of transfer per unit time, that is, the flow rate, is
It is desirable to adjust stepwise between maximum and zero.

Conventionally, this flow rate adjustment has been carried out by adjusting the effective opening area of a single pipe using a clamping tool such as forceps in the middle of a pipe for transferring body fluids or replacement fluids. Specifically, the pipe is made to be flexible, that is, to be elastically deformable in the radial direction, and the flow rate is adjusted by partially crushing the pipe in the radial direction using a clamping tool. was.

(Problem that the invention aims to solve) However, in the conventional flow rate adjustment method, the clamper relies on his or her intuition to adjust the amount of pipe collapse (clamp position), making it difficult to accurately obtain the desired flow rate. It becomes difficult. In particular, it is virtually impossible to obtain a state close to a fully closed state (a state in which the flow rate is extremely small) because the area to which the pipe is clamped becomes extremely small, and the clamping tool may slip on the pipe.

Particularly during surgery, it is necessary to frequently adjust the flow rate as described above, but this adjustment of the flow rate takes a considerable amount of time and has become an obstacle in performing the surgery.

Therefore, an object of the present invention is to provide a liquid flow rate adjustment device for body fluids or replacement fluids that can accurately and quickly change the flow rate when transferring body fluids or replacement fluids from above to below. .

(Means and actions for solving the problems) In order to achieve the above-mentioned object, the present invention has the following configuration. In other words, it is a flow rate adjustment device that is used by being connected to a main pipe that transfers body fluids or replacement fluids from the top to the bottom using a head difference, and includes a first head having an inlet, and a second head having an outlet. , a plurality of sub-pipes connected in parallel to both the heads, and a switching means for selectively opening and closing the plurality of sub-pipes.

In the present invention having the above configuration, one or more sub pipes can be selectively used by the switching means. Therefore, by transferring the body fluid or replacement fluid through the selected sub-pipe, the desired flow rate can be accurately and easily obtained. In particular, since the sub pipe can be used in either fully open or fully closed state, it is possible to safely and quickly adjust the flow rate in stages without requiring any skill. Become.

(Example) An example of the present invention will be described below based on the attached drawings.

FIG. 1 shows an embodiment of the present invention. In FIG. 1, 1 is a body fluid or replacement fluid storage part located at an upper position, and 2 is a body fluid or replacement fluid storage part located at a lower position. The head difference between them is defined as H. The upper reservoir 1 is used as a patient during heart surgery, for example, and in this case the lower reservoir 2 is used as an oxygenator (or its reservoir). Furthermore, when the liquid in the upper reservoir 1 is a replacement fluid such as blood for transfusion or a medicinal solution, the lower reservoir 2 is used as the patient.

Transfer of body fluid or replacement fluid from the upper storage section 1 to the lower storage section 2 is performed using a head H through a pipe-type transfer device A. This transfer device A includes an upper main pipe 3 whose upper end is open to the upper storage section 1, a lower main pipe 4 whose lower end is opened to the lower storage section, and an intervening device between the main pipes 3 and 4. The flow rate adjustment device B according to the present invention is equipped with a flow rate adjustment device B according to the present invention.

The flow rate adjustment device B includes an upper head 10 as a first head, a lower head 11 as a second head,
A plurality of (three in the embodiment) sub-pipes 12A, 1 connect the two heads 10 and 11 in parallel to each other.
2B, 12C.

The upper head 10 is made of an integrally molded product such as plastic, and has an inlet 13 that opens upward, and three connection ports 14A, 14B, and 14C that open downward.
For this inlet 13, each connection port 14A, 14
It has a communication space 15 that communicates B and 14C. On the other hand, the lower head 11, which has the same shape as the upper head 10, is made of an integrally molded product such as plastic and has an outlet 16 that opens downward, three connection ports 17A, 17B, and 17C that open upward, and the outlet 16 that has the same shape as the upper head 10. For each connection port 17A, 17B, 17C
It has a communication space 18 that communicates with the. Such upper and lower connection ports 14A and 17A are connected by a sub pipe 12A, similarly 14B and 17B are connected by a sub pipe 12B, and 14C and 17
C is connected by a sub pipe 12C.

The connection ports 14A, 14B, and 14C have different opening areas, and the sizes are as follows: 14A, 14B, 14C in order from the larger one to the smaller one.
It is said to be C. In addition, connection ports 17A, 17B,
17C also has different opening areas, from larger to smaller, 17A, 17
B, 17C. Furthermore, each sub pipe 1
2A, 12B, and 12C have different opening areas from each other, and they are 12A, 12B, and 12C in order from larger to smaller. The open opening areas of 14A, 17A, and 12A are made equal to each other, and similarly the open opening areas of 14B, 17B, and 12B are made equal to each other, and 14C
The opening areas of 17C and 12C are also set to be equal to each other. The opening areas of the inlets 13, 16 and the main pipes 3, 4 are set to be the same as or larger than the opening area of the sub pipe 12A, which has the largest opening area.

The above-mentioned flow rate adjustment device B has, for example, the inlet 13
is connected to the lower end of the upper main pipe 3, and the outlet 16
is used by being connected to the upper end of the lower main pipe 4.

In the embodiment shown in FIG. 1, each of the sub pipes 12A, 12B, 12
C has flexibility and can be easily elastically deformed in the radial direction. As the clamp tool 19, forceps are used. In addition, each sub pipe 12A, 12B, 12C
Both are formed from transparent members.

Next, the operation of the above configuration will be explained. First, among the sub-pipes 12A, 12B, and 12C, 12B and 12C are sandwiched between clamps 19 and crushed in the radial direction to be fully closed, while 12A is left fully open without the clamp 19.
In this state, due to the head H, the body fluid or replacement fluid that has passed from the upper storage section 1 through the upper main pipe 3 is moved from the lower main pipe 4 to the lower storage section 2 through only the sub pipe 12A. In this state, the flow rate is at its maximum. Further, when the sub pipes 12A and 12B are clamped (fully closed) by the clamp tool 19, while only the sub pipe 12C is fully opened, the flow rate becomes minimum. Furthermore, the sub pipe 12A
and 12C are clamped by the clamp tool 19 to be fully closed, while only the sub pipe 12B is fully opened, the flow rate will be an intermediate value.

2 to 4 show other embodiments of the present invention, and the same components as those in the previous embodiments are given the same reference numerals and their explanations will be omitted.

This embodiment shows a case where a separate valve member is used as a switching means for selecting the sub pipe through which body fluid or replacement fluid flows. That is, the upper head 10 holds three plate-shaped valve members 21A, 21B, and 21C so as to be slidable laterally in correspondence with the three connection ports 14A, 14B, and 14C. Each of the valve members 21A, 21B, and 21C has a portion located in the communication space 15 that covers the corresponding connection port 14A, 14B, and 14C, and has communication ports 22a, 22b, and 22c in this portion. Each communication port 22a, 22b, 22c has a size equal to or larger than the opening area of the corresponding connection port 14A, 14B, 14C. Such valve members 21A, 21B, 21C are operated by operating portions 23a, 23b, 23 extending to the outside of the upper head 10.
c, and is slid by gripping the operation parts 23a, 23b, and 23c. According to this sliding movement, the communication port 22a for the connection port 14A
Communication port 22 for communication, interruption, and connection port 14B
Communication port 2 for communication, cutoff, and connection port 14C of b
2c is communicated and cut off. This communication state occurs when the valve members 21A, 21B, and 21C are largely pulled out toward the outside. More specifically, when the locking claws 24a, 24b, and 24c of the valve members 21A, 21B, and 21C are pulled out until they are locked in the upper head 10, the above-mentioned communication state occurs (see FIG. 4). . On the contrary, the valve members 21A, 21B,
When the tip 21C is pushed in until its tip abuts against the side wall of the upper head 10, the above-mentioned shut-off state occurs.

Here, an annular seal member (O-ring) 31 is provided around each connection port 14A, 14B, 14C to seal between the valve members 12A, 21B, 21C.
is installed. Although not shown, the portions of each valve member 21A, 21B, and 21C extending to the outside of the upper head 10 are also sealed. Further, a flexible protective film 32 made of a see-through member is provided so as to surround the connecting portions 23a, 23b, and 23c.
The inside of the upper head 10 is maintained in a sterilized or aseptic state (operating parts 23a, 23b, 2
3c is held via the protective film 32).

In this embodiment, the valve members 21A, 21B,
By adjusting the slide of 21C, the auxiliary pipe through which body fluid or replacement fluid passes can be selected. In the embodiment, the widths of the operating portions 23a, 23b, and 23c are changed depending on the flow rate.

FIG. 5 shows yet another embodiment of the present invention. In FIG. 5, the same components as in the embodiment shown in FIG. 1 are given the same reference numerals.

In this embodiment, among the three connection ports 14A, 14B, and 14C of the upper head 11, the two connection ports 14B and 14C on both sides have the same effective opening area, and It is smaller than the effective opening area of the central connection port 14A. Further, the central connection port 14a has the same effective opening area as the inlet 13. on the other hand,
Since the lower head 12 has the same shape and dimensions as the upper head 11, the connection ports 17A, 17B, 17C
The relationship between the sizes of the effective opening areas is the same as that of the connection ports 14A, 14B, and 14C of the upper head 11 described above, and the connection port 17a in the center is
It has an effective opening area of the same size as .

Therefore, three sub pipes 12 are connected in parallel to each other between the upper head 11 and the lower head 12.
Among A, 12B, and 12C, the two sub pipes 12B and 12C on both sides have the same effective opening area, and have a smaller effective opening area than the central sub pipe 12A. There is.

As an example of a method for increasing the flow rate in stages using the flow rate adjustment device according to this embodiment, see 3.
Close all the main sub-pipes 12A, 12B, 12C with three forceps 19 (see Fig. 1),
At the same time as the start of extracorporeal circulation etc., the auxiliary pipes 12 on both sides
It is possible to adopt a method of releasing one of B and 12C, then releasing the remaining side sub-pipes, and finally releasing the central sub-pipe 12A.

In the illustrated embodiment, the change in flow rate when a desired sub-pipe is selected and released is known in advance, so there is no risk of sudden changes in flow rate. In addition, the structure is simple and does not require any skill to operate, and anyone can use it in the same way.
It can be done easily and quickly.

Although the illustrated embodiments have been described above, the present invention is not limited to the aspects of the above embodiments.
For example, the number of sub pipes can be set to two or four or more as necessary. Further, the size of the effective opening area of each sub-pipe can be determined as necessary. Furthermore, the order in which the sub-pipes are opened or closed, the number of sub-pipes to be released, etc. can be determined as appropriate. In addition, there is only one sliding valve member, and its position can be changed in stages according to the number of sub-pipes, and by adjusting the sliding position in multiple stages, the sub-pipe can be fully closed. Alternatively, the following selection may be made.
Furthermore, as a switching means for selectively opening and closing the sub-pipe, a roller-type fine adjuster used for manual control of minute drips, etc. can be used instead of forceps.

(Effects of the invention) As is clear from the above explanation, according to the present invention, the flow rate of body fluids or replacement fluids can be adjusted in stages accurately, easily, and safely without requiring any skill. Alternatively, a replacement fluid flow rate adjustment device can be provided.

[Brief explanation of the drawing]

FIG. 1 is a side cross-sectional system diagram showing one embodiment of the present invention. FIG. 2 is a side sectional view of a main part showing another embodiment of the present invention. FIG. 3 is a sectional view taken along the line -- in FIG. 2. Fourth
The figure is a sectional view taken along the line -- in FIG. FIG. 5 is a side sectional view of a main part showing still another embodiment of the present invention. A... Transfer device, B... Flow rate adjustment device, 1...
Upper storage part, 2...Lower storage part, 3...Upper main pipe, 4...Lower main pipe, 10...Upper head (first
head), 11...lower head (second head), 12
A~12C...Sub-pipe, 13...Inflow port, 16
...Outflow port, 19...Clamp tool, 21A-21
C...Valve member.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A flow rate regulating device used by being connected to a main pipe for transferring body fluids or replacement fluids, which comprises a first head having an inlet and a second head having an outlet. , a plurality of auxiliary pipes connected in parallel to both the heads, and a switching means for selectively opening and closing the plurality of auxiliary pipes, a flow rate of body fluid or replacement fluid. Adjustment device. (2) The body fluid or replacement fluid flow rate regulating device according to claim 1, wherein the plurality of sub-pipes have different effective opening areas. (3) The body fluid or replacement fluid flow rate regulating device according to claim 1, wherein two of the three sub-pipes have an equal effective opening area and a smaller effective opening area than the other one. . (4) The body fluid or replacement fluid flow rate regulating device according to claim 1, wherein the effective opening area of one of the plurality of sub-pipes is equal to the effective opening area of the main pipe. (5) The sub pipe is flexible and can be elastically deformed in the radial direction, and the switching means clamps the sub pipe;
The body fluid or replacement fluid flow rate regulating device according to claim 1, wherein the device is a clamping device that fully opens or fully closes by unclamping. (6) The switching means is slidably held in the first head and includes a valve member for selectively communicating one of the sub pipes with the inlet. The body fluid or replacement fluid flow rate regulating device according to claim 1. (7) The body fluid or replacement fluid according to claim 1, wherein the first head is located above the second head, and the body fluid or replacement fluid is transferred from above to below using a head difference. Flow rate adjustment device.