JPH07194691A - Method of eliminating high negative pressure - Google Patents

Abstract

PURPOSE:To provide a method of eliminating high negative pressure using a drainage device in a pleural cavity instead of making complex improvements with respect to a suction bag originally intended to be disposed after use. CONSTITUTION:The method of the present invention is effected using a suction bag 2 being connected to a drainage pipe 1 inserted through a pleural cavity, a suction pipe system in which a suction pump 3 is connected to the suction bag 2 through a drain tank 4, a detection pipe system in which a pressure sensor 6 is connected to the suction pipe system through a multiple electromagnetic valve 7, a controller 9 being electrically connected to the pressure sensor 6 and for maintaining a difference of pressure from suction pressure on a predetermined level, and a controlling pipe system in which the controller 9 is electrically connected to the multiple electromagnetic valve 7 and a remaining port of the electromagnetic valve 7 is connected to an air filter 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for eliminating high negative pressure in intrathoracic drainage used for draining exudate in the thoracic cavity after a human body operation.

[0002]

BACKGROUND OF THE INVENTION Generally, the inside of the thoracic cavity is always under negative pressure, which is about −6 to −12 cmH ₂ O at the time of inspiration and about 0 to −3 cmH ₂ O at the time of exhalation. Although the inner drainage drainage at constant negative pressure in the range of about -5 to -25cmH ₂ O being performed, coughing, sneezing, there often can intrathoracic pressure is accompanied by a rapid Goyang-negative pressure by deep breathing or the like, the As a result, air leakage from the membrane injury site to the skin, subcutaneous emphysema or mediastinum emphysema, or tissue death, postoperative bleeding, chest pain, etc. may occur.
Therefore, it is necessary to eliminate this abnormal pressure and return it to normal negative pressure.

[0003]

2. Description of the Related Art Conventionally, an underwater drainage device has been the mainstream for this type of intrathoracic drainage, that is, for these devices, a bag similar to the suction bag incorporated in the present invention is divided into a plurality of chambers for suction. It had functions such as pressure adjustment.

That is, as shown in FIG. 3, the conventional underwater discharge device is composed of four compartments, namely, a manometer chamber 21, a water sealing chamber 22, a drainage storage chamber 23, and a negative chest pressure control chamber 24. Each of the chambers 21.22.23.24 is erected from the lower surface and is partitioned by a partition wall 25.26.27 having a slight space above.

The manometer chamber 21 further hangs down from the upper surface to form a hanging wall 28 having a slight distance downward, and a ventilation hole 2 communicating with the atmosphere to one side chamber 28a of the hanging wall 28.
9, a pump connection hole 30 communicating with a suction pump (not shown) is formed on the upper surface of the other side chamber 28b of the hanging wall 28, and a suction pressure adjusting liquid or a liquid for adjusting suction pressure is provided below the manometer chamber 21. It contains water W1.

[0006] The water-sealing chamber 22 is also hung from the upper surface to form a hanging wall 31 having a slight space below the hanging wall 3.
The manometer side 22a of No. 1 is communicated with the pump connection hole 30 communicating with the suction pump above the partition wall 25. The drainage storage chamber 23 side of the hanging wall 31 is located above the partition wall 26 at the drainage storage chamber side. Water W2, which is in communication with the water-sealing chamber 22, is contained below the water-sealing chamber 22 to prevent the inflow of air from the atmosphere to the inside of the chest cavity.

The drainage storage chamber 23 has a suction hole 32 formed on the upper surface thereof so as to communicate with the inside of the thoracic cavity of a patient, and stores drainage W3 discharged downward by suction of a suction pump.

Next, the thoracic cavity negative pressure control chamber 24 is appropriately bent from above to hang down, and a hanging wall 33 having a slight space below is hung down.
A ventilation hole 34 communicating with the atmosphere is formed in the one-side chamber 24a of the hanging wall 33, a valve device 35 is provided near the lower end of the hanging wall 33, and a partition wall 37 is formed from the valve device 35.
And a valve device 36 is provided near the upper end of the partition wall 37 to form a gas flow chamber 38 and a pressure fluctuation display chamber 39. Below the one-side chamber 24a, air is introduced from the atmosphere to the inside of the chest cavity. It contains water W4 for preventing inflow.

The underwater drainage device constructed as described above is used when a high negative pressure is generated due to a patient's coughing, sneezing, etc.
Water W1. Stored in the lower portion of the manometer chamber 21 and the water sealing chamber 22. W2 vigorously moves to the inside of the chest cavity, and at the same time, the water W4 in the one side chamber 24a of the chest cavity negative pressure control chamber 24 is pushed by the atmospheric pressure, and the water level in the gas flow chamber 38 rises and at the same time the water level in the pressure fluctuation display chamber 39 rises. In order to eliminate this, air is sent from the ventilation hole 34 to the valve device 3
Air is bubbled through the notch provided in the valve seat of No. 5 and passed through the liquid to the inside of the chest cavity to eliminate the negative pressure that is stronger than the set suction pressure, that is, the high negative pressure in the chest cavity. is there.

[0010]

However, the underwater discharge device constructed as described above has a manometer chamber 21 and a water sealing chamber 22.
And a drainage storage chamber 23 and a negative chest pressure control chamber 24 must be formed, and each chamber must be provided with a complicated partition wall or valve device. From a medical point of view, the disposable suction bag was made very expensive each time.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and as a result of the study, a suction bag originally intended for disposable use is not subjected to complicated processing, and a high-intensity drainage device is used for high suction. The purpose is to create and provide a method of relieving pressure.

[0012]

The structure of the intrathoracic drainage device for carrying out the method of the present invention is such that a suction bag connected to a discharge tube inserted into the thoracic cavity, a suction bag and a suction pump are provided via a drain tank. Control the differential pressure between the connected suction pipe system, the detection pipe system that connects the suction pipe system and the pressure sensor via the multi-way solenoid valve, and the suction pressure electrically connected to the pressure sensor to a constant pressure. And a control pipe system in which the control device and the multi-way solenoid valve are electrically connected to each other and an air filter is attached to the other port of the multi-way solenoid valve.

[0013]

Using the intrathoracic drainage device having the above structure, the pressure sensor detects a constant differential pressure from the suction pressure, and the control device receives the detection signal from the pressure sensor to switch the multi-way solenoid valve. This is to send air over the filter back to the inside of the chest cavity.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The method of eliminating high negative pressure in intrathoracic drainage according to the present invention will be specifically described below with reference to the drawings of the embodiments.

FIG. 1 is a schematic explanatory view of an intrathoracic drainage device used in the present invention, FIG. 2 is a graph showing a negative pressure in a used state, and FIG. 3 is a conventional device for eliminating a high negative pressure. FIG.

The present invention relates to a method of eliminating high negative pressure in intrathoracic drainage used for draining exudate in the thoracic cavity after the operation of a human body, and inserting it into the thoracic cavity of a patient. A suction bag 2 to which the discharged exhaust pipe 1 is connected, a suction pipe system 5 in which the suction bag 2 and the suction pump 3 are connected via a drain tank 4, and the suction pipe system 5 and a pressure sensor 6. Control device 9 for setting and controlling a differential pressure between a detection pipe system 8 connected via a multi-way solenoid valve 7 and a suction pressure electrically connected to the pressure sensor 6 to a constant pressure.
And the control device 9 and the multi-way solenoid valve 7 are electrically connected, and the intrathoracic drainage device including the control tubing system 11 in which the air filter 10 is attached to the other port of the multi-way solenoid valve 7 is used. Then, the pressure sensor 6 detects a constant differential pressure from the suction pressure, and the control device 9 receives the detection signal from the pressure sensor 6 and switches the multi-way solenoid valve 7 to reverse the air over the air filter to the inside of the chest cavity. It is something to send.

That is, in the intrathoracic drainage used in the present invention, the drainage tube 1 inserted into the postoperative thoracic cavity of a human body is inserted into the upper surface of the suction bag 2, and the suction bag 2 and the suction pump 3 are suction tubes. The system 5 is used for communication. First,
With the suction pipe system 5, the upper surface of the suction bag 2 and the drain tank 4 are communicated with each other via the positive pressure prevention valve 12, and further, the drain tank 4, the suction pump 3 and the suction pipe system 5 are communicated with each other. The drain tank 4 is provided with a drain valve 4a for discharging the drain.

Then, as shown in FIG. 1, the suction bag 2
The suction pipe system 5 communicating with the drain tank 4 and the multi-way solenoid valve 7 are communicated with the detection pipe system 8, and the multi-way solenoid valve 7 and the pressure sensor 6 are also communicated with the detection pipe system 8. An air filter 10 is connected by a control pipe system 11 to the other end of the valve 7 where the suction pipe system 5 and the detection pipe system 8 are not connected.

The pressure sensor 6 and the control device 9 are electrically connected to each other, and the control device 9 sets and controls the pressure difference between the suction pressure and the suction pressure to a constant pressure, and the suction pressure display section. 9a, a suction pressure setting operation unit 9b, a suction time setting operation unit, a display unit, or a stop time setting operation unit, a display unit, etc. are additionally provided. The solenoid valve 7 is electrically connected.

The intrathoracic drainage device constructed as described above drives the suction pump 3 so that the suction tube system 5, the drain tank 4, the suction tube system 5, the suction bag 2,
The drainage tube 1 is sucking drainage fluid in the thoracic cavity to a certain negative pressure in this order, and at this time, the pressure sensor 6 constantly keeps the negative pressure of the suction tube system 5 and the like through the multi-way solenoid valve 7. It is something that is checked.

The graph shown in FIG. 2 represents the negative pressure state in the thoracic cavity during intrathoracic drainage.
Is a constant differential pressure with respect to the suction pressure, and the differential pressure is set by the control device 9, H2 represents the predicted high negative pressure at the time of abnormal negative pressure, and H3 represents the suction pressure. In other words, if the expected high negative pressure such as H2 is caused by coughing, sneezing, etc., air leakage from the membrane injury part in the thoracic cavity to the skin, subcutaneous emphysema or mediastinum emphysema, or tissue lobe death,
Postoperative bleeding, chest pain, etc. may occur, and the present invention prevents the abnormal negative pressure and releases the high negative pressure.

That is, the pressure sensor 6 of the detection pipe system 8 detects a constant differential pressure H1 with respect to the suction pressure H3 at the predicted high negative pressure H2, and the control device 9 receives a detection signal from the pressure sensor 6 for various directions. The solenoid valve 7 is switched, and by switching the multi-way solenoid valve 7, the air passing through the air filter 10 is supplied to the entire device and is sent back to the inside of the chest cavity.

The air of the air filter according to the present invention easily flows back to the inside of the thoracic cavity, and the expected high negative pressure H2 is reduced to the normal suction pressure H3.
The pressure sensor 6 detects that the suction pressure H3 has returned to the normal suction pressure H3, and the multi-way solenoid valve 7 again.
The drainage of the exudate in the thoracic cavity is continued by the suction pressure H3 that is set according to the setting.

Incidentally, H4 represents an expected high positive pressure, which is an abnormal positive pressure, which is returned to the normal suction pressure H3 by opening the positive pressure prevention valve 12 by an appropriate means.

[0025]

EFFECTS OF THE INVENTION The method of eliminating a high negative pressure of the present invention is to detect a constant differential pressure from a set suction pressure with a pressure sensor,
High negative pressure can be immediately eliminated by switching the multi-way solenoid valve with the control device, and since a suction bag having a complicated structure is not required, it is possible to provide an intrathoracic drainage device that uses a disposable suction bag, which is the original purpose. In addition, it is possible to suppress the surge of medical expenses, and it has a very practical and highly significant effect.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram of an intrathoracic drainage device used in the present invention.

FIG. 2 is a graph showing negative pressure in use.

FIG. 3 is an explanatory diagram of a conventional device for eliminating high negative pressure.

[Explanation of symbols]

 1 Discharge pipe 2 Suction bag 3 Suction pump 4 Drain tank 4a Drain valve 5 Suction pipe system 6 Pressure sensor 7 Multi-way solenoid valve 8 Detection pipe system 9 Control device 9a Suction pressure display unit 9b Suction pressure setting operation unit 10 Air filter 11 Control pipe system 12 Positive pressure check valve

Claims (1)

[Claims] 1. In the intrathoracic drainage, a suction bag connected to a discharge tube inserted into the chest cavity of a patient, a suction tube system in which the suction bag and a suction pump are connected via a drain tank, A detection pipe system in which a suction pipe system and a pressure sensor are connected via a multi-way solenoid valve, and a control device for setting and controlling a differential pressure between a suction pressure electrically connected to the pressure sensor and a constant pressure, Using an intrathoracic drainage device that electrically connects the control device and the multi-way solenoid valve and includes a control tube system in which an air filter is attached to the other end of the multi-way solenoid valve, a constant suction pressure is used. When a negative pressure is generated, the control device detects the differential pressure with a pressure sensor, and the control device switches the multi-way solenoid valve in response to the detection signal from the pressure sensor to send air over the air filter back to the inside of the chest cavity. How to resolve.