JP2787845B2 - Blood collection transfusion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for collecting, storing and retransfusing blood lost from a patient during or after an operation.

[0002]

2. Description of the Related Art In recent years, acquired immunodeficiency syndrome (AID)
S) The patient's own blood spilled during surgery is collected by suction from the operative field and washed from the viewpoint of fear of infection due to hepatitis and hepatitis, problems such as immune reaction to external proteins, and saving of the stored blood itself. Alternatively, autologous blood transfusion, which returns blood by performing filtration or the like, has become widespread.

[0003] Autologous blood collection and transfusion methods are generally broadly classified into two types: a non-washing type and a washing type. The non-washing type simply returns collected blood by passing it through a blood filter or the like. This method is limited to chest-related operations with low contamination from the viewpoint of safety. On the other hand, the cleaning method uses a blood inflow part, a blood collection reservoir, a suction pump,
It is composed of a mechanism for concentrating and washing blood (centrifugal separation method is widely used) and a blood return bag. I have.

[0004] Non-cleaning type devices used for chest-related surgery are commercially available, but a tube for chest drainage is connected to a blood storage bag. It uses a method of returning blood to itself. However, even in operations involving the thoracic region, there is a concern that liver and kidney disorders may occur due to free hemoglobin in the stored blood, and in most cases, blood is returned after washing.

[0005] In order to cope with such a current situation, the present inventors firstly combine autologous blood with a device that collects and filters blood and directly transfuses it into a patient, or a device that concentrates, washes and returns blood. The invention of a blood collection and transfusion apparatus which can cope with both cases of use and which is convenient for detailed postoperative management has been disclosed.
Although disclosed in Japanese Patent Publication No. 236960, any of the devices has a configuration in which a blood storage unit is attached to the side of a main body portion including a liquid collecting, water sealing, and a suction pressure setting unit. After completion, the main body is used as a drainage device. However, the operation of attaching and detaching the connection tube and opening and closing the opening / closing mechanism accompanying the connection tube is very complicated, and there is a possibility that the main body is contaminated by outside air.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of such current situation of autologous blood collection and transfusion, and has been made to be compact,
It is lightweight and can collect blood by aspirating blood collected from the patient with appropriate pressure and store blood, and can effectively administer blood anticoagulants,
In addition, the thrombus that has occurred can be removed, the blood can be safely collected without being contaminated by outside air, and transfusion can be performed. No complicated switching operation of the connection tube is required, and after collecting the drained blood, low-pressure continuous suction drainage is continued. It is an object of the present invention to provide a blood collection and transfusion apparatus which can be used as a medical device and is convenient for postoperative management.

[0007]

That is, the present invention relates to an apparatus for aspirating and collecting body fluids such as drained blood and reusing blood, comprising a collecting part for storing body fluids, and a water seal. Unit and a suction pressure setting unit are integrated into one container. A communication port is provided at the upper part of the partition wall between the parts to allow gas communication, and a CT tube provided with an opening and closing mechanism is connected to the upper part. A body fluid inlet and an air filter provided with an opening / closing mechanism are provided, and a body fluid outlet pipe is connected to a position inside the liquid collecting section and below the body fluid inlet, and a connection port provided with an opening / closing mechanism is connected to the body fluid flowing port. Branched and provided at the top of the entrance,
A blood collection and transfusion apparatus, wherein a CT tube is connected to the body fluid inlet via a filtration mechanism, and a port for injecting a blood anticoagulant is provided in the CT tube or the filtration mechanism. .

The details of the blood collection and transfusion apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an entire apparatus according to an embodiment of the present invention.

A blood collection and transfusion apparatus according to the present invention basically comprises a liquid collecting part (1) for storing body fluids such as blood drainage, a water seal part (2) and a suction pressure setting part (3). It consists of a single container integrating the liquid collecting part (1), the water sealing part (2), and the suction pressure setting part (3). However, there is no problem if the above (1) to (3) are constituted by independent rigid containers, and are mutually connected by connecting tubes.

The liquid collecting portion (1) may be in any of a cylindrical shape and a rectangular tube shape.
A rectangular tube shape is desirable from the viewpoint of compactness for easy handling, and it is made of a transparent or translucent material so that the amount of collected body fluid can be easily measured and the state of the body fluid can be observed. Is good. The liquid collecting part (1) is preferably designed with a scale on its side so that the amount of bleeding immediately after the operation can be accurately measured. As shown in FIG. 1, by providing a partition wall (15) in the liquid collecting section (1) and dividing it into two tanks, the accuracy of measurement can be improved, and after returning the collected blood to the patient, When continuously used as a drainage for low-pressure continuous suction, when the amount of body fluid increases, it can overflow from the upper part of the partition wall and flow into the second tank. The material of the liquid collecting portion (1) is not particularly limited as long as it is a lightweight material. For example, a hard vinyl chloride resin or the like is suitably used.

A body fluid inlet (8) is provided above the liquid collecting section (1), and an opening / closing mechanism A is provided via a filtering mechanism (7).
An air filter (10) to which a CT tube (4) having (5) is connected and an opening / closing mechanism C (11) is attached.
Is provided. The CT tube (4) communicates with the inside of the patient's body via a catheter, and bodily fluids such as blood drainage are discharged. The filtration mechanism A (7) or the CT tube (4) is provided with an injection port (6) for injecting a blood anticoagulant such as citric acid.

Further, the body fluid outlet pipe (12) is connected to a position in the liquid collecting part (1) below the body fluid inlet (8), and a connection port (11) provided with an opening / closing mechanism B (13). 1
4) is branched at a position above the body fluid inlet (8).

On the other hand, when the partition (15) is provided in the liquid collecting section (1) as described above and divided into two tanks, as shown in FIG. 1, a check valve (16) is provided at the bottom of the partition (15). Is provided so that the two tanks communicate with each other at the bottom of the liquid collecting section so that the blood flows only in one direction from the second tank to the first tank, so that the collected blood passes over the partition wall (15). Even when the blood is collected in the second tank, when the blood is taken out through the body fluid take-out tube (12), the first
When the amount of blood in the tank decreases, the blood in the second tank naturally flows into the first tank, so that the blood in the liquid collecting part (1) can be taken out smoothly.

Furthermore, if the bottom wall of the liquid collecting part (1) is provided with a downward inclination toward the position of the bottom opening end of the bodily fluid extracting pipe (12), the blood naturally flows when the collected blood is taken out. It conveniently gathers at the bottom open end of the outlet tube (12).

The filtration mechanism (7) is for removing blood clots and other debris, and is installed at a position in front of the blood inlet (8) of the liquid collecting part (1) as shown in FIG. However, it may be provided at a position near the lower part of the body fluid inlet (8) in the container of the liquid collecting part (1), and the former is appropriate in consideration of replacement due to clogging, but the latter is appropriate. Then, the whole device can be more compactly assembled. Thus, there is an advantage in adopting any of them. Incidentally, a two-stage structure may be employed by changing the roughness of the filter or the like used. A relatively coarse filter of 100 to 250 μ is appropriate for the filtration mechanism (7). In the case of a two-stage structure as described above, the first stage has a play filter shape of 0.2 to 0.5 mm, The second stage is suitably a filter having a certain degree of fineness of 100 to 250 μ.

The suction pressure setting section (3) is connected to the water sealing section (2) and the liquid collecting section (1) in a gas flow through a communication port provided on one side of the partition wall. One side is connected to a negative pressure source such as a suction pump.
The suction pressure setting section (3) may be a water column type as shown in FIG. 1, or may be a suction pump itself having a mechanism capable of finely adjusting the pressure.

Next, a method of using the blood collection and transfusion apparatus according to the present invention will be described. First, the CT connected to the body fluid inlet (8) above the liquid collecting part (1) via the filtration mechanism (7).
The other end of the tube (4) is inserted and placed in the surgical wound, the opening / closing mechanisms B and C (13, 11) are closed, the opening / closing mechanism A (5) is opened, and suction is performed from the suction pressure setting section (3). Suction with a pump or the like. At first, the bleeding blood mainly flows in, but the bleeding blood flow gradually decreases and finally stops. Therefore, the collected and stored drained blood is regenerated and returned to the patient.

After returning the blood stored in the liquid collecting section (1) to the patient, the opening and closing mechanisms B and C (13, 11) are closed,
By opening the opening / closing mechanism A (5), the apparatus is continuously used as a drainage for low-pressure continuous suction, and the body fluid collected in the liquid collecting section (1) is discarded again.

[0019]

According to the autologous blood collection and transfusion apparatus of the present invention, blood discharged from a patient can be collected and stored with an appropriate suction pressure, the amount of blood collected can be accurately controlled, and the blood collection can be performed immediately after surgery. Measurement of blood volume can be made thin. Further, the autologous blood collection and transfusion apparatus of the present invention can effectively administer an anticoagulant for blood so as not to form a thrombus, and even if a blood coagulate or the like is generated, it can be effectively filtered and removed. Moreover, the autologous blood collection and transfusion device of the present invention can be used in a closed state without being contaminated by the outside air because the liquid collection unit, the water seal unit and the suction pressure setting unit are integrated, and the collection is performed for the blood patient. Is a simple and compact blood collection and transfusion device with a suction mechanism that can be used as a drainage for continuous low pressure suction after blood return, and is extremely useful in the medical industry.

[Brief description of the drawings]

FIG. 1 is an overall view showing one embodiment of a blood collection and transfusion apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid collection part 2 Water sealing part 3 Suction pressure setting part 4 CT tube 5 Opening / closing mechanism A 6 Injection port 7 Filtration mechanism 8 Body fluid inlet 10 Air filter 11 Opening / closing mechanism C 12 Body fluid taking-out pipe 13 Opening / closing mechanism B 14 Connection port 15 Partition wall 16 Check valve

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yasunobu Izumi 27-4 Nakajimashita, Aizome-cho, Tsuchizaki-ko, Akita Sumi Veterinary Co., Ltd. Examiner Mitsuru Matsumoto (56) References A) (58) Field surveyed (Int. Cl. ⁶ , DB name) A61M 1/36 525 A61M 1/00 510

Claims (3)

(57) [Claims] 1. A device for aspirating and collecting bodily fluids such as drained blood and reusing blood, wherein a liquid collecting part for storing bodily fluids, a water seal part and a suction pressure setting part are integrated. A communication port is provided in the upper part of the partition wall between each part to communicate gas flow, and a bodily fluid inlet for connecting a CT tube provided with an opening and closing mechanism on the upper part, and an opening and closing mechanism are provided. And an air filter, and a body fluid outlet pipe is connected to the lower part of the body fluid inlet in the liquid collecting part, and a connection port provided with an opening / closing mechanism is branched at a position above the body fluid inlet. A blood collection / transfusion device, wherein a CT tube is connected to the body fluid inlet via a filtration mechanism, and a port for injecting a blood anticoagulant is provided in the CT tube or the filtration mechanism. . 2. A partition having an opening at an upper portion thereof is provided to constitute a liquid collecting section by two tanks, and a check valve is provided at a bottom of the partition so that a liquid is collected in one direction at a bottom of the liquid collecting section. The blood collection and transfusion apparatus according to claim 1, wherein the tanks are communicated with each other. 3. The blood collection and transfusion apparatus according to claim 1, wherein the bottom wall of the liquid collecting section is inclined downward toward the position of the bottom opening end of the body fluid extracting tube.