JP2001054566A - Valve mechanism for medial suction and discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly safe valve mechanism which prevents the inflow of atmosphere air and sterile water for water sealing into the celom of a patient and does not hold an excessive negative pressure for a long time when the patient's respiration state changes suddenly in natural drainage by attachably and detachably providing the connecting port of the upper part of a water sealing chamber with the valve mechanism having a filter structure. SOLUTION: A spherical valve element of the valve mechanism 1 has the filter structure which is preferably a sterile filter. When the patient has a lot of coughing by the sudden change in the respiration state, the thoratic cavity is sharply narrowed and the gas flows from the inside of the thoratic cavity through a liquid chamber 2 via the sterile water 5 of the water sealing chamber 3 to the outside from the connecting port 6a in the upper part. At this time, the valve element is pushed up by the flow of the gas, by which a clearance is made between the constricted part and the valve element, from which the gas flows out. When the thoratic cavity attempts to restore the original state, the flow heads the direction toward the inside of the thoratic cavity and heads toward the thoratic cavity from a liquid collecting chamber 2 via the sterile water 5 from the water sealing chamber 3. At this time, the valve element closes the constricted part and the excessive negative pressure is generated in the thoratic cavity but the valve element has the filter structure and rapidly releases the excessive negative pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical low-pressure suction / discharge device for discharging a liquid and a gas from a body cavity such as a chest after surgery mainly in a surgical treatment.

[0002]

2. Description of the Related Art Medical suction / discharge devices are often used to maintain a constant intrathoracic pressure after thoracotomy. In this case, a disposable type using a three-bottle method and an instrument with a built-in pump are used. Type and exists. Further, the disposable type has the most common pressure regulating section and liquid collecting section integrally formed, and the pressure regulating section and the liquid collecting section as disclosed in JP-A-60-5162 are separated. These are connected and used, and the liquid collecting part can be exchanged. The instrument type is one in which the pressure adjusting section is constituted by an instrument pump, and the liquid collecting section has the same form as that disclosed in JP-A-60-5162.

[0003] The following advantages have been recognized in the form in which the pressure adjusting section and the liquid collecting section can be separated and exchanged. (1) Since only the liquid collecting part can be separated and replaced, 50 for children
0cc or less, or 1000cc or more for adults, or 100% for adults depending on the purpose of treatment
Various capacities from about cc to 500 cc can be handled. (2) It is economical because only the liquid collecting part can be disposable. (3) Since the liquid collecting section is composed of the drainage chamber and the water sealing chamber, even if the draining section is separated from the pressure regulating section, the draining chamber is directly connected to the atmospheric pressure because the draining chamber is through the water sealing chamber. It is excellent in safety and can be used as natural drainage without suction especially for mild pneumothorax patients.

[0004] However, in the case of using as a natural drainage in the advantage (3), it is easy to prevent communication with the atmosphere in a water seal room when the patient is still, but the patient is coughed or the like. If the breathing condition changes suddenly, the pressure difference due to the water seal may be exceeded, and the air may flow into the patient's body cavity, or the sterile water in the water seal chamber may migrate to the collection chamber, infecting the patient. There is a possibility that danger may occur. As a countermeasure, it is common practice to install a one-way valve at the air flow opening of the water seal chamber to prevent abrupt air inflow and to prevent sterile water in the water seal from entering the liquid collection chamber. However, in this method, the patient's body cavity is maintained at an excessive negative pressure for a long time, which not only lowers the patient's QOL but also may cause a medically dangerous condition. was there.

[0005]

SUMMARY OF THE INVENTION The present invention has been made as a result of various studies to solve such a problem of the conventional valve mechanism of a medical suction / discharge device container. In the event of a sudden change in the breathing state of the patient, a safe medical suction that prevents the sterile water in the air and water seal from flowing into the body cavity of the patient and prevents excessive negative pressure from being maintained for a long time It is an object of the present invention to provide a valve mechanism for a container for a discharge device.

[0006]

That is, the present invention comprises a pressure control section for controlling a suction pressure and a liquid collection section comprising a liquid collection chamber and a water sealing chamber, and further comprises a pressure control section and a liquid collection section. In the medical low-pressure continuous suction device which is a separable form, the valve mechanism of the medical low-pressure continuous suction device container, which is detachably provided at the connection port at the upper part of the water sealing chamber and further has a filter structure. is there.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a view showing a state of use as a natural drainage, and FIGS. 2 to 4 show an embodiment of a valve mechanism according to the present invention. In FIG. 1, the liquid collecting section includes a liquid collecting chamber (2) composed of two chambers and a water sealing chamber (3) having a thin tube (4). The room is connected, and a connection port (6b) for connecting a drain tube (8) from a patient is connected on the upper left side, and a thin tube (4) from a water sealing chamber (3) is connected on the upper right side. I have. The water sealing chamber (3) has a connection port (6a) connected to the pressure regulating unit at the upper part, and when used by natural drainage, this connection port (6a) is opened to the atmosphere. In a normal case, there is no problem since the outside air is shut off by the sterile water (5) in the water sealing chamber (3), but in order to make the connection safer, this connection port (6a) is used.
A valve mechanism (1) is attached to the watertight chamber to prevent backflow of the sterile water (5) in the water sealing chamber into the body cavity due to a sudden inflow of air. The valve mechanism (1) has a structure in which a valve body moves so as to open when flowing from inside the container and close when flowing from outside the container.
Generally, a one-way valve of a ball or flutter type is used.

Next, the valve mechanism of the present invention will be described with reference to FIGS. FIG. 2 shows an example using a ball valve mechanism, in which a spherical valve element (9a) has a filter structure. This filter is desirably a sterile filter that is often used for medical applications from the viewpoint of hygiene. Since the sterile filter has a large airflow resistance, it is possible to prevent a rapid gas inflow. If the respiratory state of the patient suddenly changes and coughs greatly, the pleural cavity is sharply narrowed. Therefore, the pleural cavity passes from the pleural cavity to the liquid collection chamber (2), and the water sealing chamber ( Water sealing chamber (3) through sterile water (5) of 3)
The gas flows outward from the upper connection port (6a).
At this time, as shown in FIG. 2B, the valve element (9a) is pushed up by the flow of the gas, and a clearance is created between the constriction (10a) and the valve element (9a), and the gas flows to the outside. leak.

[0009] As a next stage phenomenon, the narrowed chest cavity tries to return to its original state. At this time, the gas flows in the thoracic cavity, so that the gas flows from the water sealing chamber (3) to the pleural cavity from the liquid collection chamber (2) via sterile water (5). At this time, if there is no valve mechanism, the outside air rapidly
a), resulting in a rapid flow of sterile water (5),
The capillary (4) rises and flows into the liquid collecting chamber (2). Due to the rapid flow, the sterile water (5) is accompanied by droplets, and in some cases, it is considered dangerous to move directly into the thoracic cavity. However, when the sterile water (5) has a valve mechanism, it is shown in FIG. 2 (a). As described above, the valve (9a) controls the flow of gas into the thoracic cavity by the stenosis (1).
By closing 0a), the inflow of outside air can be blocked. At this time, when the thoracic cavity returns to its original state, the circuit becomes a closed system in order to cut off the inflow of the outside air, and the inside of the thoracic cavity has an excessive negative pressure. However, the valve element (9a) according to the present invention has a filter structure. Therefore, as shown in FIG. 2A, a gentle gas flow is generated from the outside in the direction toward the chest cavity, and the excessive negative pressure is promptly released. Because the gas flow is gentle,
The sterilized water (5) in the water seal becomes a rapid stream and does not move to the collection chamber (2) in the form of droplets, and since the gas that flows in has passed through the filter, there is a risk of infection. Less secure.

[0010] In the case of a normal one-valve, excessive negative pressure is maintained in the thoracic cavity for a long time, and the patient is in pain and is not in a favorable condition. If the process of generating the excessive negative pressure is repeated several times, a medically dangerous state may sufficiently occur. Here, the behavior of the sterile water (5) is as follows. Since the flow of the gas passing through the valve element (9a) according to the present invention is gentle, the sterile water (5) in the water sealing chamber (3) flows rapidly and splashes. Although it does not move to the liquid collecting chamber (2) side in the state, it is safe, but in order to prevent the transfer of the sterile water (5) to the liquid collecting chamber (2), a thin tube (4) which is a known means is used. By increasing the diameter of the upper part, safety is further improved. In addition, as in Japanese Patent Application No. 11-2680, it is more preferable to incorporate a transition prevention mechanism (7) which is a means for avoiding the occurrence of a droplet in the event that the droplet is generated, in order to further enhance safety.

FIGS. 3 and 4 show another embodiment of the shape of the valve body. In the embodiment shown in FIG. 3, the valve body has a plate shape, which has a higher productivity than the spherical shape shown in FIG. 2, and is preferable for cost reduction. In this case, one end may be fixed, or the whole circumference may not be fixed, but it is desirable to fix one end in order to prevent malfunction such as snagging. FIG. 3A shows an example in which the valve is closed, and FIG. 3B shows an example in which the valve is open. Also in this case, the valve element (9b) has a filter structure. FIG. 4 shows an embodiment for improving the degree of sealing of the valve body at the stenosis.
(A) shows the lower surface of the plate-shaped valve element (9c), that is, the stenosis part (1).
A rubber elastic body is attached to the outer periphery of the contact surface with the valve body 0c) to prevent outside air from flowing through a gap between the valve body (9c) and the constricted portion (10c). This further reduces the risk of infection. The rubber elastic body may be a general rubber elastic body such as silicone rubber or nitrile rubber, and preferably has low hardness and softness in order to ensure airtightness even at a low pressure difference. FIG. 4 (b) shows the valve element having a downward conical shape so that the valve element comes into contact with a line at the stenosis part (10d), and this is also the valve element (9d) and the stenosis part (10).
d) is an embodiment for preventing the outside air from flowing through the gap with d) and reducing the risk of infection.
c) and the valve element (9d) naturally also have a filter structure.

In the present valve mechanism, when the liquid collecting section is connected to the pressure adjusting section, which is a general use, and the continuous suction is performed, the liquid collecting section is not removed except when moving by a toilet or the like. The valve mechanism is not particularly required, and a detachable form that can be attached only when the liquid collecting section is detached is preferable. on the other hand,
In the case of using the natural drainage only in the liquid collecting part as a premise, it is preferable that the form incorporated in advance in the upper part of the water sealing chamber of the liquid collecting part is preferable in terms of saving the operator's labor, but in that case, Since the valve mechanism hinders the work of water injection into the water sealing chamber, it is necessary to provide a separate water injection port, and naturally, this water injection port requires a cap for maintaining airtightness.
Therefore, it is not necessary to reduce the labor, and it is more desirable to adopt a detachable form from the viewpoint of manufacturing cost.

[0013]

As described above, by using the valve mechanism of the container for a medical suction / discharge device according to the present invention, even if the respiratory state of the patient changes suddenly, the sterilized water in the air and the water-tight chamber can be removed from the body cavity of the patient. It is extremely safe and useful because it does not move into the interior and does not maintain excessive negative pressure for a long time.

[Brief description of the drawings]

FIG. 1 is an embodiment of a container for a medical suction / discharge device and a valve mechanism according to the present invention, and is an example of a connection state between a liquid collecting section and a valve mechanism.

FIG. 2 is an embodiment of a valve mechanism of a container for a medical suction / discharge device according to the present invention.

FIG. 3 is an embodiment of a valve mechanism of a container for a medical suction / discharge device according to the present invention.

FIG. 4 is an embodiment of a valve mechanism of a container for a medical suction / discharge device according to the present invention.

[Explanation of symbols]

 1. Valve mechanism 2. Liquid collecting chamber 3. Water sealing room 4. Capillary 5. Sterile water 6a, 6b. Connection port 7. Transition prevention mechanism 8. Drain tube 9a, 9b, 9c, 9d. Valve body 10a, 10b, 10c, 10d. Stenotic parts 11a, 11b, 11c, 11d. Outer wall 12. Rubber elastic body

Claims (1)

[Claims] 1. A low-pressure medical device comprising a pressure adjusting unit for controlling a suction pressure and a liquid collecting unit comprising a liquid collecting chamber and a water sealing chamber, wherein the pressure adjusting unit and the liquid collecting unit can be separated. A valve mechanism for a container for a medical low-pressure continuous suction device, which is detachably provided at a connection port in an upper part of a water sealing chamber in the continuous suction device and further has a filter structure.