JPH06277281A - Blood collecting and blood transfusion device - Google Patents

Abstract

PURPOSE:To provide the device absorbing and collecting the drained blood at the time of medical operations and returning it to the body of patient capable of using both for collecting the drained blood and for the drainage thereafter, applying the blood anticoagulant effectively and with a simple operation and removing the thrombus, and collecting the drained blood and transfusing the blood safely without being contaminated by outside air. CONSTITUTION:The device consists of a vessel integrating a liquid collection section 1 storing the body fluid such as drained blood, water sealed section 2, and suction pressure setting section 3. A connection port 14 of a body fluid taking tube 12 with the opening port end located near the bottom is attached to the top or side part of a liquid collection section. To the upper part, a body fluid flow port 8 is attached and a CT tube 4 is connected through a filter mechanism 7. Further an air filter 10 is installed and a port 6 to inject the blood anticoagulant is arranged on the filter mechanism 7 or a CT tube 4.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art In recent years, acquired immunodeficiency syndrome (AID)
S) and hepatitis infection, problems such as immune reaction to external proteins, and saving of stored blood itself, the patient's own blood spilled during surgery is suctioned and collected from the surgical field and washed. Alternatively, autologous blood transfusion in which blood is returned by performing filtration or the like is becoming popular.

The autologous blood collection and transfusion methods are generally classified into two types, a non-washing method and a washing method. The non-washing method returns blood simply by passing collected blood through a blood filter or the like. From the viewpoint of safety, it is limited to chest related surgery with a low degree of contamination. On the other hand, the cleaning method is a blood inflow part, a blood collecting reservoir, a suction pump,
It is composed of a blood concentrating and washing mechanism (centrifugation method is widely used) and a blood return bag, but it has a suction mechanism that can be managed individually, and it is required to have a safe and simple blood collection. There is.

Although a non-washing type device is commercially available for use in thoracic surgery, a tube for chest drainage is connected to a blood bag, and the blood bag is separated after the blood is stored. It uses a method of returning blood to itself. However, even in thoracic surgery, there is a risk of liver and renal damage due to free hemoglobin in the stored blood. Therefore, in most cases, blood is returned after washing.

In order to cope with such a current situation, the present inventors previously combined the case where autologous blood is collected, filtered and directly transfused into a patient, and combined with a device for concentrating, washing and returning blood. Invented a blood collection and transfusion device that can be used in both cases and is convenient for fine-grained management after surgery.
As disclosed in Japanese Patent No. 236960, however, in any of the devices, the blood storage part is attached to the side of the main body part including the liquid collection, water seal, and suction pressure setting part. After the completion, the main body is used as a drainage device, but the operation of attaching and detaching the connecting tube and the opening and closing of the opening and closing mechanism accompanying it is very complicated, and there is a possibility of being contaminated by outside air.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the present situation of autologous blood collection and transfusion, and is of a small size,
It is lightweight and can collect blood from a patient by collecting blood with suction at an appropriate pressure, effectively administer a blood anticoagulant, and remove the generated thrombus, so it is safe without being contaminated with outside air. A blood recovery transfusion device that is convenient for post-operative management, and can be used as a low-pressure continuous suction drainage after collecting drained blood without requiring complicated switching operations such as connecting tubes. The purpose is to do.

[0007]

That is, the present invention is an apparatus for sucking and collecting body fluid such as drained blood and reusing the blood, which is a liquid collecting section for storing the body fluid and a water sealing section. And a suction pressure setting part are integrated into one container. A communication port is provided in the upper part of the partition wall between the parts so that they communicate with each other in a gas flow manner. A connection port provided with an opening / closing mechanism for the bodily fluid extraction pipe located at, and a body fluid inlet for connecting a CT tube provided with an opening / closing mechanism at the top and an air filter provided with an opening / closing mechanism are provided, A CT tube is connected to the body fluid inlet through 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 collecting and transfusing 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.

The blood collecting and transfusing device according to the present invention basically comprises a liquid collecting part (1) for storing body fluid such as drained blood, a water sealing part (2) and a suction pressure setting part (3). In addition, the liquid collection part (1), the water sealing part (2), and the suction pressure setting part (3) are integrated into a single container, and a communication port is provided in the upper part of the partition between the parts to allow gas flow. However, there is no problem even if the above (1) to (3) are constituted by independent individual rigid containers and are communicated with each other by a connecting tube.

The liquid collecting part (1) may have either a cylindrical shape or a rectangular tube shape, but in view of forming the container,
A rectangular tube shape is desirable from the viewpoint of compactness for easy handling, and it is made of a transparent or semitransparent 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 the side so that the amount of bleeding immediately after the operation can be accurately measured, particularly up to about 200 ml. As shown in FIG. 1, by providing a partition wall (15) in the liquid collecting part (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 part (1) is not particularly limited as long as it is a lightweight material, but it is suitable to use, for example, a hard vinyl chloride resin.

A body fluid inlet (8) is provided above the liquid collecting section (1), and an opening / closing mechanism A is provided through a filtration mechanism (7).
An air filter (10) connected with a CT tube (4) having (5) and additionally provided with an opening / closing mechanism C (11)
Is provided. The CT tube (4) communicates with the patient's body via a catheter, and body fluid such as drained blood is discharged. Further, 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.

On the other hand, on the lower side wall of the liquid collecting part (1), the opening end is located in the vicinity of the bottom of the liquid collecting part (1) and the connection port (14) of the body fluid extracting pipe (12) for taking out blood or the like. However, an opening / closing mechanism B (13) is attached as an attachment. The shape of the open end of the bodily fluid extraction tube (12) is cut diagonally or a V-shaped or U-shaped notch is formed so that the bottom wall of the liquid collecting section (1) is not blocked. It is desirable to provide it.

Further, as shown in FIG. 2, the body fluid outlet pipe (12) is connected to the body fluid inlet (8) inside the liquid collecting section (1).
It is also possible to have a structure in which the connection port (14) provided with the opening / closing mechanism B (13) is branched at the position above the body fluid inlet (8) while being connected to the position below.

On the other hand, when the partition wall (15) is provided in the liquid collecting part (1) as described above to divide the tank into two tanks, the check valve (16) is provided at the bottom of the partition wall (15) as shown in FIG. Attaching the two tanks so that the two tanks communicate with each other at the bottom of the liquid collecting section so that the blood flows from the second tank to the first tank only in one direction, the collected blood will cross the partition wall (15). Even when the blood is collected in the second tank, the first
When the blood in the tank is reduced, the blood in the second tank naturally flows into the first tank, so that the blood in the liquid collecting section (1) can be smoothly taken out.

Further, as shown in FIG. 3, if the bottom wall of the liquid collecting portion (1) is provided with a downward slope toward the position of the bottom opening end of the body fluid extracting pipe (12), the collected blood can be collected. Upon removal, blood naturally collects at the bottom open end of the body fluid withdrawal tube (12) for convenience.

The filtration mechanism (7) is for removing blood coagulation and other debris, and its installation position is in front of the blood inlet (8) of the liquid collecting part (1) as shown in the example of FIG. However, as shown in FIG. 3, it may be provided near the lower part of the body fluid inlet (8) in the container of the liquid collecting part (1), and when replacement due to clogging is considered. The former is suitable, but the latter allows the entire device to be more compact. As described above, there is an advantage in adopting either one. In addition, it is also possible to change the roughness of the filter or the like to be used to form a two-stage structure. A relatively coarse filter 100-250μ is suitable for the filtration mechanism (7). When the two-stage structure is used as described above, the first stage has a play filter shape of 0.2-0.5 mm, The second stage is a filter 100 to 250 with a certain degree of fineness.
It is appropriate to set μ.

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

Next, a method of using the blood collecting and transfusing 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 into the surgical wound and left in place, the opening / closing mechanisms B, C (13, 11) are closed, the opening / closing mechanism A (5) is opened, and suction is performed from the suction pressure setting section (3) side. Aspirate with a pump. Initially, the discharged blood mainly comes in, but the discharged blood gradually decreases and finally stops. Therefore, the recovered and stored waste blood is regenerated and returned to the patient.

FIG. 4 is a diagram showing an embodiment in the case where the stored blood is washed, concentrated, stored, and returned to the patient. The blood washer (18) is connected to the connection port (14) at the lower part of the liquid collecting part (1), the opening / closing mechanism B (13) is opened, and the blood is transferred by suction from the blood washer (18) side. At this time, it is desirable to pass the filtration mechanism (17). As the filtration mechanism (17), a filter (10
It is suitable to use 0 μ or less). When removing blood from the liquid collecting part (1), the opening / closing mechanism A (7) of the CT tube (4) is closed in advance in consideration of the influence on the human body, and then the air filter (10) provided on the upper part is closed. ) Open / close mechanism C (11) to introduce clean air.

When the return of the stored blood from the liquid collecting part (1) to the patient is completed, the opening / closing mechanisms B and C (13, 11) are closed, the blood washing machine (18) and the like are removed, and the opening / closing mechanism A ( After opening 5), the device is continuously used as a drainage for low-pressure continuous suction, and the body fluid accumulated in the liquid collecting section (1) is discarded again.

[0021]

INDUSTRIAL APPLICABILITY The autologous blood transfusion device of the present invention can collect and store blood discharged from a patient at an appropriate suction pressure, and can accurately control the amount of collected blood. The blood volume can be measured finely. Further, the autologous blood transfusion device of the present invention can effectively administer an anticoagulant for blood so as not to generate a thrombus, and even if a blood coagulation product or the like is generated, it can be effectively filtered and removed. Moreover, the autologous blood recovery transfusion device of the present invention can be used in a closed state without being contaminated by outside air because the liquid collecting part, the water sealing part, and the suction pressure setting part are integrated, and the blood is collected to the patient. It is a simple and compact blood recovery transfusion device with a suction mechanism that can be used as a drainage for low pressure continuous suction after the blood return, and is extremely useful in the medical industry.

[Brief description of drawings]

FIG. 1 is an overall view showing an embodiment of a blood collecting and transfusing device according to the present invention.

FIG. 2 is an overall view showing another embodiment of the blood collecting and transfusing device according to the present invention.

FIG. 3 is an overall view showing another embodiment of the blood collecting and transfusing device according to the present invention.

FIG. 4 is a diagram for explaining a method of taking out stored blood from a liquid collecting part.

[Explanation of symbols]

 1 Liquid Collection Part 2 Water Sealing Part 3 Suction Pressure Setting Part 7, 17 Filtration Mechanism 8 Body Fluid Inlet 10 Air Filter 12 Body Fluid Extraction Pipe 14 Connection Port 15 Partition Wall 16 Check Valve 18 Blood Washer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukihiko Sakaguchi 27-4 Nakajima Shimozaki, Tsuchizaki Port, Akita-shi 27-4 Sumitomo Medical Co., Ltd. 4 Within Sumitomo Medical Co., Ltd.

Claims (5)

[Claims] 1. A device for sucking and collecting body fluid such as drained blood and reusing blood, wherein a liquid collecting section for storing body fluid, a water sealing section and a suction pressure setting section are integrated. It is composed of a single container, and a communication port is provided in the upper part of the partition wall between each part to make it communicate in a gas flow manner. A body fluid inlet for connecting a CT tube provided with an opening / closing mechanism and an air filter provided with an opening / closing mechanism are provided, and a filtration mechanism is provided at the body fluid inlet. Connect the CT tube via
A blood recovery transfusion device, wherein a port for injecting a blood anticoagulant is provided in the CT tube or the filtration mechanism. 2. The body fluid outlet pipe is connected to a position below the body fluid inlet in the liquid collecting section, and a connection port provided with an opening / closing mechanism is branched at a position above the body fluid inlet. The blood collection transfusion device according to claim 1, wherein 3. A blood collecting and transfusing apparatus, wherein the filtering mechanism according to claim 1 is arranged in a chamber of a liquid collecting section and near a lower portion of a body fluid inlet. 4. A partition having an opening at the top is provided to configure the liquid collecting section with two tanks, and a check valve is attached to the bottom of the partition so that the bottom of the liquid collecting section has a unidirectional flow. The blood recovery transfusion device according to any one of claims (1) to (3), wherein the tanks are communicated with each other. 5. The method 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 discharge tube. The blood collection and transfusion device described.