JPS61109571A - Suction regulator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for adjusting the suction level acting on a device connected to a patient's body cavity.

Prior Art and its Problems Under and water as described in U.S. Pat.
In the drain system, there is a device to weaken the suction obtained from the outlet installed in the wall of the hospital room and adjust the suction level to a set value, for example, -20 to -130 cm of water column. It is equipped. This adjustment device generally includes a large arm and a small arm, the small arm having a manometer with a U-shaped tube open to the outside air. The U-shaped tube is filled to a level corresponding to the desired suction, and when a suction greater than the desired value is applied, outside air flows from the opening through the U-shaped tube while creating bubbles. This device helps maintain the drain device at a desired suction level when there is virtually no near leak within the patient's pleural cavity.

If a near leak occurs within the pleural cavity, it is desirable to maintain a predetermined level of suction within the pleural cavity to maintain the lungs in a fully expanded state. In the conventional apparatus as described above, even if the strength of the wall-mounted suction is 150 cm water column and the suction control chamber is installed to maintain the suction level at 120 cm water column, the actual The suction level can be as low as -12 cm of water column if the near leak in the pleural cavity is large.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a device that allows a wall-mounted suction to fully act on the drain device if the suction level does not maintain a predetermined value.

This objective is achieved by a device that is equipped with a device for measuring the actual negative pressure based on the suction in the drain device and that allows the wall-mounted section to be brought into full effect immediately if the suction level is weaker than a predetermined value. . Thus, in accordance with the present invention, a device is provided that includes a bellows having an internal chamber connected to a collection chamber of a drain device. The outside of the bellows is exposed to atmospheric pressure.

A passage is provided extending from the wall-mounted suction, the inner end of which is open and located directly below the lower end of the bellows. The bellows closes the inner end of the passageway with its lower end in one position and prevents outside air from entering the passageway of the wall-mounted suction. When the bellows is in the raised position, the lower end of the bellows rises to allow outside air to enter the wall-mounted suction. Therefore, if the negative pressure in the collection chamber is less than a set value, for example 20 cm water column, the bellows closes the passage from the wall-mounted suction to the outside air and the negative pressure
The wall-mounted suction is fully applied to the collection chamber until the water column exceeds 0 cm. If the negative pressure in the collection chamber is greater than a set value, the bellows will rise, opening the passage from the wall-mounted section to the outside air, thereby weakening the negative pressure in the collection chamber.

The object of the present invention is to adjust the suction level in the drain device so that when the negative pressure becomes weaker than the desired value, the wall-mounted suction is immediately applied to the entire collection chamber to maintain the desired suction level. Our goal is to provide equipment for this purpose.

Another object of the present invention is to provide a suction regulator for a drain device, which adjusts the activated suction depending on the actual suction level in the collection chamber.

Yet another object of the present invention is to provide a pleural drain device that allows wall-mounted suction to be fully applied to the collection chamber and the pleural cavity in the event of a large air leak within the pleural cavity. .

亙 - 11 μ per letter Hereinafter, the present invention will be explained in more detail based on the accompanying drawings.

FIG. 1 is a longitudinal cross-sectional view showing the drain device in a state where the suction control valve section is open.

In FIGS. 1 and 2, the collection chamber of the drain device is indicated by (1). For details of the drain device, see U.S. Pat. No. 4,312,351 (effective on January 26, 1982), U.S. Pat. It is known from the prior art as shown in . A connection (2) for the thoracotomy tube connection is provided in the upper part of the drain device.

Furthermore, a passageway (3) is provided for connecting the collection chamber to a suction source. The suction source is a wall-mounted suction (wall 5) used in hospitals.
suction>, in which case a device is required to dampen the strong suction obtained from conventional wall-mounted suction sources.

A suction regulator with a suction level measurement is provided in the collection chamber. A feedback passageway is also provided in the collection chamber for adjusting the suction level obtained by the wall-mounted suction in relation to the suction level measured in the collection chamber.

Said measuring part comprises an extension (4) of the upper end of the collection chamber, the extension (4) comprising a bellows (
6) is provided with an opening (5) leading into the interior. US Patent No. 4
No. 3963'86 (effective August 2, 1983) discloses a bellows for measuring negative pressure in a drain device.

The bellows (6) is provided in a chamber (7), and the chamber (7) is provided with an opening (8) to the outside air.

Therefore, the outer surface of the bellows is exposed to atmospheric pressure.

As the negative pressure within the bellows increases, the bellows contracts and causes its lower end to rise.

The lower end of the chamber (7) is provided with an opening that communicates with the upwardly bent portion of the passageway (10). The lower end of the passageway (10) is connected to a passageway (3) connecting the collection chamber and the wall-mounted suction. The opening of the passageway (10) is provided with an O-ring (11) in order to form a seal between the lower end of the bellows 6) and the opening in the upwardly bent portion of the passageway (10). This seal prevents outside air from entering the passageway (1,0>) when the lower end of the bellows (6) abuts on it.

FIG. 2 shows the position of the suction regulator element when the negative pressure in the collection chamber is strong enough to contract the bellows. As is clear from the figure, in this state, the passageway (10) is open to the outside air from the outlet (8) through the chamber (7). Therefore, outside air enters through the passageway (3) and the suction acting on the collection chamber is weakened. When the suction level in the collection chamber weakens, the bellows (6) is lowered, the passage (10) is closed and outside air is prevented from entering through the inlet (8), and the suction-based negative pressure acting on the collection chamber increases.

During normal use of the drain device, the bellows rise and fall repeatedly. That is, the opening of the passage (10) is closed when the negative pressure in the collection chamber is weaker than the desired value, and the opening of the passage (10) is closed when the wall-mounted suction is fully applied to increase the negative pressure in the chamber. )
``Search'' is carried out in such a way that the aperture is opened.

This suction regulator can be placed under the physician's observation as an indicator of the condition of the patient's pleural cavity. A strong air leak within the patient's pleural cavity increases the time that the passageway (10) is closed;
To shorten the time that the passageway (10) is open.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is a partially exploded front view of a drain device equipped with a suction regulator in a state where the passage to outside air is closed, and Fig. 2 is a partially exploded front view of a drain device equipped with a suction regulator in a state where the passage to outside air is closed. It is a partially exploded front view of the drain device in a passage open state. (1)...Collection chamber, (2)...
... Connection, (3) ... Passageway, (4) ... Extension of collection chamber, (5) ... Opening, (6) ... ...bellows, (7) ...chamber, (8) ...inlet, (10) ...passage, (11) ...opening (hereinafter referred to as Above) FIG, / Hθ2

Claims (5)

[Claims] (1) A suction regulator for regulating suction acting on a chamber of a drain device from a suction source, the suction regulator including a measuring section connected to the chamber for measuring negative pressure in the chamber, and a measuring section connected to the chamber for measuring negative pressure in the chamber. and a feedback section for automatically adjusting a suction level exerted by the suction source in response to a detected negative pressure in the chamber. (2) The feedback section comprises a passage leading from the suction source to the measurement section for enabling air supply to the suction source.
Suction regulator as described in section. (3) The suction regulator according to claim 1, wherein the measuring section includes a bellows, the inside of the bellows is connected to the chamber, and the outside of the bellows is open to the outside air. (4) the feedback section includes a passage extending from the suction source to an opening near the lower end surface of the bellows, and the lower end surface of the bellows closes the opening when the negative pressure in the chamber is weaker than a set value; 4. The suction regulator according to claim 3, wherein the passage opening is opened to introduce outside air when the negative pressure in the chamber is stronger than a set value. (5) a chamber surrounding the bellows includes an inlet;
5. A suction regulator according to claim 4, wherein the inlet is adapted to open to the outside air in order to communicate the feedback section to the outside air when the negative pressure in the collection chamber is lower than a set value.