JPS6330441Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a blood vessel, particularly a blood vessel that can be suitably used as a reservoir for venous (exhausted) blood.

When a patient's venous (exsanguinated) blood is sent to an artificial lung or the like during surgery, a hyperfunctional liquid storage tank is provided to ensure a stable supply of blood and remove air bubbles and other contaminants.

Fig. 1 shows an example of the conventional method, in which a bag-shaped bag is attached to the blood inlet a inside a liquid storage tank c which has a blood inlet a at the upper part and a blood outlet b at the lower part. A filter d is provided, and the bag-shaped filter d
This removes air bubbles and other mixtures in the blood.

However, in the above-mentioned conventional device, since the blood is supplied by dropping into the liquid storage tank c from the upper blood inlet port a, new air bubbles are generated and mixed inside the liquid storage tank c. In addition, since the mesh size (overaccuracy) of the bag-shaped filter d is determined, it cannot be easily changed or adjusted, and furthermore, the bag-shaped filter is difficult to manufacture. I had a problem that I was told was troublesome.

The present invention relates to a blood vessel that can solve these conventional problems, and includes a liquid storage tank that has a blood intake port and a blood delivery port in its part, and has an open top.
It has a blood introduction opening connected to the blood intake port at the lower end, a bubble outlet opening opening at the upper part of the liquid storage tank at the upper end, and a blood outflow port at the outer periphery. a blood filter body consisting of a filter cylinder provided vertically and a sheet-like filter wound an appropriate number of times around the outer periphery of the filter cylinder; a fixing plate that supports the upper end of the blood tank; and an upper end of the liquid storage tank. It is possible to prevent the generation of new air bubbles by closing the open upper end of the liquid storage tank while holding the fixing plate between them, and by attaching a three-way stopcock to the upper side of the lid. By adjusting the number of windings of the shaped filter, it is possible to easily change the overaccuracy as required, and since the filter has a sheet shape, it is easier to manufacture than a bag shaped filter. It has the advantage that it is easy to use, and the three-way stopcock makes it possible to maintain a constant amount of blood in the reservoir.

Embodiments of the present invention will be described below based on the drawings.

Figures 2 to 4 show an example in which the present invention is applied to a blood storage tank. A liquid inlet 3 provided is adapted to be connected to a liquid inlet tube 6 for receiving venous blood 4 and blood withdrawal 5.
Further, a liquid delivery port 7 provided at the lower end of the inclined portion 2 is connected to a liquid delivery pipe 10 for sending blood to an artificial lung 9 via an arterial pump 8. Further, the upper opening of the liquid storage tank 1 is provided with a lid 13 having an attachment opening 12 for attaching a three-way stopcock 11.
are integrally attached using an adhesive or the like, and at the same time as the lid 13 is attached, the filter fixing plate 14 can be clamped and fixed to the upper part of the inside of the liquid storage tank 1.

Further, a lower fixed tube 15 having a required length in the vertical direction is provided inside the liquid storage tank 1 of the liquid intake port 3.
At the same time, an upper fixing tube 16 is provided below the filter fixing plate 14 at a position directly above the lower fixing tube 15, and both fixing tubes 15, 16 are provided.
A liquid permeable body 17 is provided in between.

As shown in detail in FIG. 5, the liquid body 17 has a shape in which a pipe with a diameter that airtightly fits on the outer periphery of the fixed tubes 15 and 16 is divided into two parts, and the two parts are separated. a filter cylinder 19 having a fitting part 18 which has an uneven shape and fits into the part;
19'. Furthermore, the filter cylinder 19,
A slit-shaped liquid outlet 20 is formed along the longitudinal direction of the outer periphery of 19'. In the figure, reference numeral 21 indicates a strength maintaining portion in which no liquid outlet 20 is formed in the longitudinal direction of the filter tubes 19, 19', 17' indicates a liquid introduction opening, and 24 indicates a bubble outlet opening. Furthermore, a sheet-like filter 22 made of nylon, tetron, etc. is wound around the outer periphery of the filter cylinders 19, 19' a suitable number of times, one end of which is held in the fitting part 18 of the filter cylinders 19, 19'. Ori,
The other end is fixed 23 by heat welding or the like.

To assemble the above structure, the lower end liquid introduction opening 17' of the filter tube 19, 19' around which the sheet-like filter 22 is appropriately wound is connected to the lower fixed tube 15.
This can be done by fitting the bubble outlet port 24 into the upper fixing tube 16 of the container fixing plate 14, and then bonding the lid 13.

In the liquid storage tank 1 assembled in this way, when blood is introduced from the liquid intake port 3, the blood passes through the filter tube without generating new bubbles.
It will rise inside 9,19′, and at this time,
Air bubbles and other mixtures flow out into the liquid storage tank 1 through the liquid outlet 20 and the wrapped sheet filter 22 . Clean blood stored in the liquid storage tank 1 is supplied to an injector 9 and the like via an arterial pump 8. At this time, since the bottom surface of the liquid storage tank 1 has the inclined part 2 and the liquid delivery port 7 is provided at the lower end thereof, it is possible to prevent a part of the blood from staying at the bottom of the liquid storage tank 1.

Further, the separated air bubbles rise within the liquid permeable body 17 and are easily degassed. Furthermore, by closing the three-way stopcock 11 attached to the lid 13, the internal pressure of the liquid storage tank 1 can be maintained constant. Therefore, after the blood volume in the liquid storage tank 1 is brought to a certain level, the three-way stopcock 11 is closed to keep the blood volume in the liquid storage tank 1 constant at all times, making it easy to control the inflow and outflow amounts. This can improve safety. Furthermore, it is of course possible to inject a chemical solution using the three-way stopcock 11.

In addition, in the liquid body 17, when a change in overaccuracy is required, it can be easily accommodated by simply changing the number of windings of the sheet-like filter 22, so it has excellent adaptability. It has great practical value.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be applied to systems other than liquid storage tanks, and that the shape of the liquid outlet can be modified in various ways, such as by providing a large number of small holes, and that it can be applied to liquids other than blood. It goes without saying that the present invention can be applied to liquids, and that various other changes can be made without departing from the gist of the present invention.

As mentioned above, according to the overpass device of the present invention, the following excellent effects can be achieved.

(i) The sheet-shaped filter tube is wound a required number of times around the outer periphery of a vertical filter tube that has a blood introduction opening at the lower end and a blood outflow port on the outer periphery. By changing the number of windings of the filter, overaccuracy can be easily and arbitrarily changed. In other words, if you try to increase overaccuracy, clogging will normally occur,
If the overaccuracy is reduced, air removal becomes impossible, but
This can be arbitrarily and easily finely adjusted by changing the number of times the sheet filter is wound.

(ii) Since blood is supplied into the filter tube from the bottom upwards and the blood is allowed to pass through, and the passed blood is stored in the blood storage tank and then sent out to the blood delivery port, there is no risk of blood falling out. Generation of new bubbles can be prevented.

(iii) Since the separated air bubbles rise along the inside of the filter cylinder, air bubble separation and deaeration are effectively performed.

(iv) Since a sheet-like filter is used, it is easier to manufacture and can be supplied at a lower cost than a bag-like filter.

(v) The three-way stopcock maintains a constant amount of blood in the reservoir, making it easier to control the amount of blood flowing in and out, improving safety.

(vi) The lower end of the blood-containing body fits into the blood introduction opening at the bottom of the liquid storage tank, and the fixing plate that fits into the upper end of the blood-containing body is connected to the upper open end of the liquid storage tank and the lid. Since the device is fitted with the body and clamped at the same time, supporting the blood sample and keeping the liquid storage tank airtight, the blood sample device can be assembled easily and efficiently.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an example of a conventional liquid storage tank, Fig. 2 is a cutaway front view showing an embodiment of the present invention applied to a liquid storage tank, and Fig. 3 is an arrow indicated by the - arrow in Fig. 2. FIG. 4 is an explanatory view showing the entire circuit connected to the liquid storage tank, and FIG. 5 is an enlarged view taken along the - arrow in FIG. 2. 1 is a liquid storage tank, 15 and 16 are fixed tubes, 17
17' is a liquid filter, 17' is a liquid introduction opening, 18 is a fitting part, 19 and 19' are filter cylinders, 20 is a liquid outlet, and 22 is a sheet filter.

Claims (1)

[Scope of utility model registration request] A liquid storage tank having a blood intake port and a blood delivery port at the bottom and an open top, a blood introduction opening connected to the blood intake port at the bottom end, and a liquid storage tank at the top end. From a vertical filter cylinder having an opening for air bubbles opening at the top and a blood outflow port on the outer periphery, and a sheet-like filter wound an appropriate number of times around the outer periphery of the filter cylinder. The fixing plate is sandwiched between the blood-containing body, a fixing plate supporting the upper end of the blood-containing body, and the upper end of the liquid storage tank, and the upper end opening of the liquid tank is closed, and A blood vessel characterized by comprising a lid body with a stopcock attached.