JP3498322B2 - Low pressure suction and discharge device for medical use - Google Patents

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 / discharging device, and more particularly to a medical low-pressure suction / discharging device used for discharging liquid and gas from a body cavity such as a chest of a human body.

[0002]

2. Description of the Related Art A conventional low-pressure suction / discharging device of this type is an embodiment disclosed in Japanese Utility Model Publication No. 4-22750.

This low-pressure suction / discharge device (the reference numerals described in the above publication are used as they are) Y is a suction pressure adjusting section 20 having a manometer chamber 22 partitioned by a first hanging partition wall 23.
A water sealing part 25 having a first water sealing chamber 26 which is in fluid communication with the suction pressure adjusting part and is partitioned by a second hanging partition wall 27, and in fluid communication with the water sealing part. And a pleural cavity negative pressure control section 33 having a second water-tight chamber 34 in gas communication with the effluent volume measuring section. The second water-sealed chamber of the control unit can automatically and slowly return the negative pressure in the chest cavity to the set suction pressure when the negative pressure in the chest cavity of the patient becomes stronger than the set suction pressure. And a first chamber 34a having a float 39 that fits into the flow hole formed in the float stopper wall 38 having the cutout portion.
It is partitioned into a second chamber 34b having an intake / exhaust hole 36 which communicates with the above chamber and communicates with the atmosphere.

However, in the above structure, the water seal portion 25 for preventing the gas from flowing back when the suction of the suction source is stopped, and the cough of the patient or the milking of the connecting pipe causes the inside of the chest cavity of the patient to be blocked. And a negative pressure control unit 33 for returning the negative pressure in the thoracic cavity to the set suction pressure when the negative pressure becomes higher than the suction pressure set by the suction pressure adjusting unit. Moreover, since the chest negative pressure control unit 33 is partitioned by a plurality of partition walls, the device itself becomes large-scale. Therefore, the apparatus cannot be made compact, so that an installation space is required. Further, since it is necessary to fill water in both the water seal portion 25 and the negative chest pressure control portion 33, there is a drawback that the operation is not easy.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional drawbacks, the present invention makes the device compact, simplifies the use operation, and further improves the water seal part and negative thoracic cavity pressure control part. An object is to obtain a medical low-pressure suction / exhaust device capable of preventing the invasion of various bacteria when the air flows back to the collecting chamber side.

[0006]

The medical low-pressure suction / discharge device of the present invention includes a suction pressure adjusting section 20 having a manometer chamber 22 partitioned by a first hanging partition wall 23, and the suction pressure adjusting section and gas flow. Water seal part and thoracic cavity negative pressure control part 25 that communicate with each other
A, and a drainage amount measuring unit 29 having a collecting chamber 31 that is in fluid communication with the water sealing unit / negative pressure control unit for chest cavity,
The water seal part and negative thoracic pressure control part 25A have a suction port 2
The second hanging partition wall 27 of the lower end opening 40 that hangs downward from the upper wall on the right side of 4, and the second hanging partition wall 27,
Further, a gas flow passage 41 is formed at the upper end portion, and a partition wall 35A having a fluid flow passage 42 at the lower end portion is formed,
The lower end of the partition wall 35A has the second hanging partition wall 27.
The second hanging partition wall 27 and the partition wall 35A are formed so as to extend a required amount below the lower end of the manometer chamber 22 and between one side wall of the manometer chamber 22 and one side wall of the collecting chamber 31. Thus, the first chamber 26a and the second chamber 26a and 26b that can commonly store water W2 in the lower portion to prevent backflow of air from the atmosphere into the chest cavity of the patient and to bring the negative pressure in the chest cavity of the patient close to the set suction pressure 26b and a third chamber 26c are provided respectively, and the water seal part and negative pleural pressure control part 25A are provided in the thoracic cavity when the negative pressure in the patient's thoracic cavity becomes equal to or higher than a predetermined negative pressure which is higher than the set suction pressure. In order to automatically and slowly return the negative pressure to a negative pressure slightly stronger than the set suction pressure, a float that fits into the flow hole of the float stopper wall is provided.

[0007]

[Function] Explaining the function of the “water seal part” of the water seal part and negative thoracic cavity negative pressure control part, when the suction pump is stopped during suction at the desired set suction pressure, air flows backward from the suction pump side. As a result, the water levels of the water W1 and W2 change. That is, the water level in the left and right chambers of the manometer chamber of the suction pressure adjusting unit is at the same level, while the patient's thoracic cavity and the collecting chamber are in a negative pressure state. The water level in the first chamber drops to near the lower end of the second hanging partition, and the water levels in the second and third chambers rise. However, in this case, even if the water W2 is pushed to the atmospheric pressure, the water level in the first chamber does not reach the lower end surface of the second hanging partition wall, so that the air flowing backward from the suction pump is collected in the chest chamber of the patient. It does not flow into the interior.

[0008] Next, the function of the "thorax negative pressure controller" of the water seal part and negative thoracic pressure controller will be explained. For example, at the moment the patient coughs, gas is sucked from the patient's thoracic cavity through the connecting tube at low pressure. It flows into the discharge device, and as a result, the water levels in the second chamber and the third chamber drop instantaneously, and the gas passes through the lower end surface of the second hanging partition wall and the lower end surface of the partition wall, respectively, and the water W2
Pass through in a foamed state. Immediately after this, the patient's thoracic cavity becomes over negative pressure. After that, since the suction pump is being driven, the atmosphere flows from the small chamber of the manometer chamber to the large chamber, and at the same time, part of the atmosphere flows back to the collecting chamber side to control the excessive negative pressure in the chest cavity of the patient. . At this time, the backflowing atmosphere passes through the lower end opening of the second downward partition wall, passes through the water in the second chamber as bubbles, and flows into the thoracic cavity of the patient.

As a result, excessive negative pressure in the patient's chest cavity is controlled, and the water levels in the second and third chambers fall until they return to a constant negative pressure that is higher than the set suction pressure.

[0010]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. In the description of the embodiments of the present invention, the same parts as those in the conventional embodiment are designated by the same reference numerals for convenience, and the duplicated description will be omitted.

In the first embodiment shown in FIGS. 1 to 6, X is a low pressure for medical use made of transparent or translucent synthetic resin for discharging liquid and gas from the body cavity such as the chest of the human body. It is a suction and discharge device. Compared with the conventional embodiment shown in FIG.
Negative pressure in the patient's chest cavity due to the water seal to prevent gas from flowing back when the suction of the suction source is stopped and the patient's cough or milking of the connecting tube is more than the suction pressure set by the suction pressure control unit. The difference is that a negative pressure control part for thoracic cavity for returning the negative pressure in the thoracic cavity to a constant negative pressure when it becomes a strong constant negative pressure or more (shares water W2 of 1). , And other basic principles are the same.

That is, 20 is an intake hole 2 communicating with the atmosphere.
1, which has a suction pressure adjusting liquid or water W at the bottom
1 is a suction pressure adjusting unit having a manometer chamber 22 capable of accommodating the suction pressure adjusting unit 20.
2 is connected to a thin tube (left side in the figure) or a small chamber 22a and a suction source in the lower part and the suction source in the upper part by a first hanging partition wall 23 having a lower end opening which is appropriately bent from the upper wall and hangs downward. It is partitioned into a large pipe (right side in the figure) or a large chamber 22b communicating with the suction port 24.

The reference numeral 25A is integrally formed so as to communicate with the suction pressure adjusting portion 20 in a gas flow manner, and prevents backflow of air from the atmosphere into the chest cavity of a patient (not shown) and sets a negative pressure in the chest cavity of the patient. It is a water seal part and thoracic cavity negative pressure control part having a water sealing chamber and negative pressure control chamber 26 capable of accommodating water W2 for approaching suction pressure.

The water seal part and negative thoracic cavity pressure control part 25A include
The second hanging partition wall 27 of the lower end opening 40 that is appropriately bent from the upper wall on the right side of the suction port 24 and hangs downward, and the second hanging partition wall 27 that faces the second hanging partition wall 27 and that has gas at the upper end portion. The flow passage 41 is formed with a partition wall 35A having a fluid flow passage 42 at one lower end. The lower end of the partition wall 35A has a second hanging partition wall 27.
The required amount a, for example, 1 to 2 cm is extended downward from the lower end of the.

By forming the second hanging partition wall 27 and the partition wall 35A in the water sealing portion / negative pressure control portion 25A of the chest cavity, the large chamber 22b of the suction pressure adjusting portion 20 and the suction port 24 of the suction source and the gas are formed. The first on the left, which is in communication
The chamber 26a is divided into a central second chamber 26b which communicates with the lower end opening 40 in the lower portion, and a right third chamber 26c which communicates with the gas flow passage 41 in the upper portion and the fluid flow passage 42 in the lower portion. In this case, the number of rooms can be arbitrarily increased.

A liquid W is integrally formed with the water seal part / negative pressure control part 25A of the thoracic cavity so as to communicate with it in a gas flow manner, and is discharged from the thoracic cavity through a connecting pipe 30 for connecting with a patient.
3 is a drainage amount measuring unit having a collecting chamber 31 for storing 3 and the collecting chamber 31 of this drainage amount measuring unit 29 has an upper end opening so that the stored amount of the drainage W3 can be measured visually. It is divided into a plurality of partitions by partition walls 32, 32.

Reference numeral 36 denotes an inflow port for the fluid discharged from the thoracic cavity formed on the upper wall of the drainage amount measuring unit 29.
One end of a connecting tube 30 that connects with the chest cavity of the patient is attached to the.

In the above-mentioned structure, first, before the suction is performed by the suction pump as the suction source, the manometer chamber 22 of the suction pressure adjusting unit 20 and the water sealing chamber / negative pressure controlling chamber 26 of the water sealing / thoracic cavity negative pressure controlling unit 25A. Put the required amount of water W1 and W2 into both chambers. The suction pressure and the control pressure are set by this water injection level.
FIG. 1 shows the state at the time of water injection.

Next, FIG. 2 shows a state during suction by activating a suction pump (not shown). In this case, the air existing on the water surface of the large chamber 22b of the manometer chamber 22 and the first chamber 26a of the water seal portion / thorax negative pressure control unit 25A is sucked out to the suction pump from the suction port 24, and Chamber 22b,
26a immediately becomes negative pressure.

Then, while the water level existing on the large amount side of the suction pressure adjusting water W1, that is, on the large chamber 22b side in the figure rises,
The water level existing on the small amount side, that is, on the small chamber 22a side in the figure is pushed down by the atmospheric pressure, and the first hanging partition wall 2 of the manometer chamber 22 is pushed down.
Reach the position of the lower end surface of 3.

In this way, the intake hole 21 of the manometer chamber 22
When the water level existing on the side reaches the lower end surface of the first hanging partition wall 23, the water level of the water W1 does not decrease further, and as shown in FIG. It enters into the thin tube 22 a of 22, and then passes through the lower end of the first hanging partition wall, passes through the thick tube 22 b in a foamed state in the water W 1, and is guided to the suction port 24.

On the other hand, the water W2 in the first to third chambers 26a, 26b and 26c of the water seal / negative chest pressure control unit 25A.
While the water level in the first chamber 26a rises, the second chamber 26b
And the water level of the 3rd chamber 26c falls to the lower end of the 2nd hanging partition 27. Exhaust liquid and gas such as air are guided to the collecting chamber 31 from the chest cavity of the patient (not shown) through the connecting pipe 30, and the discharge liquid W3 is stored in the collecting chamber 31, while the gas is as indicated by the arrow. The second chamber 26b and the third chamber 26c of the water seal portion / negative chest pressure control portion 25A enter the second chamber 26
Only the gas that has entered b passes through the lower end of the second hanging partition wall 27, forms a foam in the water W2, passes through the inside of the first chamber 26a, and is guided to the suction port 24. The function of the "water seal" of the negative pressure control unit 25A will be described with reference to FIG.

If the suction pump is continuously driven as shown in FIG. 2 and the suction pump is stopped during suction at a desired set suction pressure, air (atmosphere) flows backward from the suction pump side as shown in FIG. As a result, the water levels of the water W1 and W2 change. That is, the small chamber 22 of the manometer chamber 22
Since the atmospheric pressure of a and the atmospheric pressure of the large chamber 22b are the same, the water levels in both chambers 22a and 22b are at the same level, while the chest cavity of the patient and the collecting chamber 31 are in a negative pressure state, so The water level in the chamber 26a drops to near the lower end of the second hanging partition 27, and the water levels in the second chamber 26b and the third chamber 26c rise. However, in this case, as shown in FIG. 3, even if the water W2 is pushed to the atmospheric pressure, the water level in the first chamber 26a does not reach the lower end surface of the second hanging partition 27, so that it flows backward from the suction pump. Air does not flow into the collection chamber 31, the patient's chest cavity.

Next, the function of the "thorax negative pressure control unit" of the water seal part / thorax negative pressure control unit 25A will be described with reference to FIGS.

First, FIG. 4 shows the moment when the connection pipe 30 is milked (squeezed) to accelerate the drainage or the patient coughs while sucking at a desired set suction pressure.

In this case, as shown by the arrow, gas (air) flows from the patient's chest cavity through the connecting pipe 30 into the low-pressure suction / exhaust device X, and as a result, the second chamber 26b and the third chamber 2
The water level on the 6c side is instantly pushed down, and the gas passes through the lower end surface of the second hanging partition wall 27 and the lower end surface of the partition wall 35A, respectively, and passes the water W2 in a foamed state. Immediately after this, the patient's thoracic cavity becomes over negative pressure.

Next, FIG. 5 shows the air flow after milking or after the patient coughs. In this case, since the suction pump is being driven, the atmosphere flows from the small chamber 22a of the manometer chamber 22 to the large chamber 2b, and at the same time, a part of the atmosphere flows backward to control the excessive negative pressure in the thoracic cavity of the patient. 31
It flows to the side. At this time, the backflowing atmosphere passes through the lower end opening 40 of the second hanging partition 27 as shown in FIG. 5, passes through the water in the second chamber 26b as bubbles, and flows into the patient's chest cavity. Go.

As a result, as shown in FIG. 6, excessive negative pressure in the thoracic cavity of the patient is controlled, and the second chamber 26b and the third chamber 26 are controlled.
The water level in c falls until it returns to a negative pressure slightly stronger than the set suction pressure. In this case, the water W2 does not completely return to the set suction pressure as shown in FIG. 2, but there is no particular problem regarding the influence on the patient and the continuous use of the low-pressure suction / exhaust device X.

By reducing the required amount of water W2 to be injected, the negative pressure in the chest cavity can be returned to near the suction pressure set by the suction pressure adjusting unit. The function, that is, the function of preventing the air from flowing back into the thoracic cavity when the suction is stopped is deteriorated, which is not preferable. Therefore, it is more appropriate to return the negative pressure to a pressure slightly stronger than the set suction pressure.

[0030]

Different Embodiments Next, different embodiments of the present invention will be described. In the description of these embodiments, the same parts (functions) as those of the conventional embodiment and the first embodiment of the present invention will be denoted by the same or similar reference numerals for the sake of convenience, and redundant description will be omitted.

The second embodiment shown in FIGS. 7 and 12 is mainly different from the second embodiment in that the second depending partition wall 27 is used.
In the central portion of the central second chamber 26b formed by the partition wall 35A and the partition wall 35A, when the negative pressure in the thoracic cavity of the patient becomes equal to or higher than a certain negative pressure higher than the set suction pressure, the negative pressure in the thoracic cavity is automatically adjusted. In order to slowly return to a negative pressure that is slightly stronger than the set suction pressure,
Fits the first float stopper wall 50 and the flow hole 51 formed in the float stopper wall 50, and
The first float 52 that allows the rising water W2 to slowly rise and pass is provided, and the collection chamber 31 is provided above the third chamber 26c of the water seal part / negative thoracic cavity negative pressure control part 25A. In order to prevent the water W2 from flowing back to the side, a second float stopper wall 53 and a second float or shielding ball 55 that fits into the flow hole 54 formed in the float stopper wall 53 are provided. That is the point.

In this case, when the negative pressure in the thoracic cavity of the patient exceeds a certain negative pressure which is higher than the set suction pressure, the negative pressure in the thoracic cavity is automatically slowly increased to a slightly higher negative pressure than the set suction pressure. As a specific structure for returning, for example, as shown in FIG. 8, a suitable notch 5 is formed in the first float stopper wall 50.
6, the flow hole 51B is formed in an elliptical shape with respect to the first float 52 having a perfect spherical shape as shown in FIG. 9, and the first float 52B is formed with respect to the flow hole 51 as shown in FIG. Forming an oval sphere, forming a through hole in a float or a stopper wall, and forming a groove in the float.

In the second embodiment, immediately after milking (squeezing operation) of the connecting pipe 30 to accelerate drainage or immediately after a patient coughs while suctioning at a desired set suction pressure, As shown in FIG. 11, the atmosphere is the manometer chamber 2
At the same time as the second small chamber 22a flows into the large chamber 22b, a part of the atmospheric air flows back to the collecting chamber in order to control the excessive negative pressure in the thoracic cavity of the patient, and further flows into the collecting chamber through the connecting tube 30. Flow into. At this time, the air flowing back flows through the lower end opening 40 of the second hanging partition wall 27, rises as bubbles in the water in the second chamber 26b, and slowly flows through the flow holes of the first float stopper wall 50 little by little. pass. As a result, the excessive negative pressure in the patient's chest cavity slowly returns to a negative pressure slightly higher than the set suction pressure.

When the patient's cough is extremely severe, the negative pressure in the patient's thoracic cavity becomes very large.
2 may further rise to the second float stopper wall 53, but at this time, the second float or the shielding ball 55 fits into the flow hole 54 and the water W2 flows into the collecting chamber 31. Prevent.

Even with this structure, the same operation and effect as those of the first embodiment of the present invention can be obtained.

The third embodiment shown in FIG. 13 is different from the above-mentioned embodiment mainly in that the second hanging partition wall 27 and the partition wall 35A are formed and the second chamber 26b is provided with an upper collecting chamber. Three
A filter member 60 that cleans the gas flowing into the first side is fixedly provided. It is desirable that the filter member 60 has at least one of bacteriostatic property, bactericidal property, and invasion preventive effect.

Even with this structure, the same operation and effect as those of the first embodiment of the present invention can be obtained.

[0038]

As is apparent from the above description, the present invention has the following effects. (1) The device can be made compact. Therefore, there is not much space for installation, and it is convenient for carrying or carrying. (2) Since the water W2 is shared for two functions, it is easy to use. Further, since a plurality of water chamber sealing chambers are not formed, it is possible to avoid the mistake of entering the amount of water (erroneous operation confirmation) as much as possible. (3) Excessive negative pressure in the patient's thoracic cavity can be slowly controlled to near the set suction pressure. (4) It is possible to prevent the invasion of various bacteria when the air flows backward from the water sealing part / negative pressure control part to the collecting chamber side. (5) It is possible to prevent the water W2 from flowing into the collecting chamber 31.

[Brief description of drawings]

1 to 6 are schematic explanatory views showing a first embodiment of the present invention.

7 to 12 are schematic explanatory diagrams showing a second embodiment of the present invention.

FIG. 13 is a schematic explanatory diagram showing a third embodiment of the present invention.

FIG. 14 is a schematic explanatory view showing an embodiment of the present invention.

[Explanation of symbols]

X ... Low-pressure suction / exhaust device, 20 ... Suction pressure adjusting unit, 21 ... Intake hole, W1, W2 ... Water, 22 ... Manometer, 23 ... First
Hanging partition wall, 22a ... small chamber, 22b ... large chamber, 24 ... suction port, 26 ... water sealing chamber / negative pressure control chamber, 25A ... water seal part / chest negative pressure control unit, 40 ... bottom end opening, 27 ... second Hanging partition wall, 26a ... First chamber, 26b ... Second chamber, 26c ... Third chamber, 41 ... Gas flow passage, 42 ... Fluid flow passage, 35A
... Partition wall, a ... Required amount, 29 ... Waste liquid amount measuring unit, 30 ...
Connection pipe, 31 ... Collection chamber, 32 ... Partition wall, 50 ... First float stopper wall, 52 ... First float, 53 ... Second
Float stopper wall, 55 ... Second float, 56
... Notch, 60 ... Filter member.

Claims (2)

(57) [Claims] 1. A suction pressure adjusting section 20 having a manometer chamber 22 partitioned by a first hanging partition wall 23, and a water sealing section and negative thoracic cavity pressure controlling section 2 communicating with the suction pressure adjusting section in gas flow communication.
5A and a drainage amount measuring unit 29 having a collecting chamber 31 that is in fluid communication with the water sealing unit / negative pressure control unit for thoracic cavity. Lower end opening 4 hanging downward from the upper wall on the right side of the mouth 24
And a partition wall 35A facing the second depending partition wall 27 and having a gas flow passage 41 at the upper end and a fluid flow passage 42 at the lower end, respectively. The lower end portion of the partition wall 35A extends below the lower end portion of the second depending partition wall 27 by a required amount, and between the one side wall of the manometer chamber 22 and the one side wall of the collecting chamber 31, The second hanging partition wall 27 and the partition wall 35A
By forming the first chamber 26a, water W2 for preventing backflow of air from the atmosphere into the chest cavity of the patient and for making the negative pressure in the chest cavity of the patient close to the set suction pressure can be shared in the lower portion. , The second chamber 26b, and the third chamber 26c, respectively, and the water seal part and negative thoracic cavity pressure control part 25A,
When the negative pressure in the patient's thoracic cavity is higher than a certain negative pressure, which is higher than the set suction pressure, the negative pressure in the thoracic cavity is automatically and slowly returned to a slightly higher negative pressure than the set suction pressure. A low-pressure suction / discharge device for medical use, which is provided with a float that fits into the flow hole. 2. A second float for preventing water from flowing back to the collecting chamber 31 side is provided in the third chamber of the water seal portion / negative chest pressure control portion. A low-pressure suction / discharge device for medical use characterized by the above.