CN214435597U - Drainage tube system - Google Patents

Abstract

There is provided a drain tube system comprising: a drainage tube having a distal end portion, a drainage opening at the distal end portion, and a drainage lumen defined therein, the drainage tube configured to drain drained fluid or tissue at a patient drainage site outwardly through the drainage lumen via the drainage opening; characterized in that the drainage tube system further comprises: a balloon located at a distal end portion of the drainage tube and non-overlapping with the drainage opening; and a balloon inflation-deflation device in gaseous communication with the balloon, the balloon inflation-deflation device configured to enable inflation and deflation of the balloon. With this drainage tube system, medical personnel can operate the balloon inflation-deflation device to eliminate or alleviate the blockage depending on the drainage situation or periodically.

Description

Drainage tube system

Technical Field

The utility model relates to a drainage tube system for postoperative drainage, especially be applicable to drainage after the stomach intestine operation.

Background

For surgical procedures, such as intra-abdominal surgery, and particularly gastrointestinal surgery, post-operative drainage is one of the most critical factors for post-operative treatment. An indwelling drainage tube is generally used to guide pus, blood, fluid, even tissue fragments and the like (hereinafter collectively referred to as drained fluid) accumulated in human tissues or body cavities to the outside of the body, so as to prevent postoperative infection and influence on wound healing. Drainage tubes are typically provided with drainage holes or openings at the distal end or wall of the distal tube and a drainage bag or balloon at the proximal end. The drainage fluid is sucked into the drainage tube from the drainage hole or the drainage opening and then flows into the drainage bag or the drainage ball through the negative pressure in the drainage bag or the drainage ball relative to the drainage part in the patient body.

However, as drainage proceeds, the drained fluid may block the drainage hole or opening or the lumen of the drainage tube; in addition, movement of tissue in the body (e.g., gastrointestinal motility) can also block the drainage apertures or openings. These possible blockages can interfere with or even completely prevent drainage, resulting in the drainage of the drained fluid being unable to drain smoothly.

To prevent drainage blockage, the medical personnel would manually squeeze the portion of the flexible drain tube outside the patient's body, either on observation or periodically, in order to expect to change the pressure within the drain lumen by such squeezing in order to loosen a drainage hole or opening or lumen that may be blocked. However, in practice, it is sometimes not effective to avoid or unclog an occlusion by squeezing the portion of the flexible drain that is in the patient's position.

Therefore, there is a need to provide a means to further avoid or unclog a blocked drain.

SUMMERY OF THE UTILITY MODEL

The utility model provides a drainage tube system can effectively and avoid or dredge the drainage tube and block up reliably through operating this kind of drainage tube system.

Specifically, a drain tube system is provided, comprising: a drainage tube having a distal end portion, a drainage opening at the distal end portion, and a drainage lumen defined therein, the drainage tube configured to drain drained fluid at a patient drainage site outwardly through the drainage lumen and via the drainage opening; characterized in that the drainage tube system further comprises: a balloon located at a distal end portion of the drainage tube and non-overlapping with the drainage opening; and a balloon inflation-deflation device in gaseous communication with the balloon, the balloon inflation-deflation device configured to enable inflation and deflation of the balloon.

By the inflation of the saccule, the saccule pushes the drained fluid around the saccule to play a role of stirring the drained fluid or pushes the organ to move away from the drainage opening, so that the blockage of the drainage opening can be eliminated or relieved.

Optionally, the balloon is integrally formed with the drain tube such that a distal end portion of the drain tube is movable proximally with inflation of the balloon.

Optionally, a balloon communication conduit is formed or disposed about the drainage tube, the balloon communication conduit placing the balloon in gaseous communication with the balloon inflation-deflation device and isolated from the drainage lumen.

Optionally, a negative pressure drainage device for generating a negative pressure relative to the pressure at the patient drainage site is connected to the drainage lumen to effect drainage by the action of the negative pressure.

Optionally, the balloon inflation-deflation device is further operably connected with the negative pressure drainage device to facilitate negative pressure generation by the negative pressure drainage device while inflating or deflating the balloon.

Optionally, the negative pressure drainage device is a drainage bag or a drainage ball, and the drainage bag or the drainage ball is communicated with the drainage lumen and used for sucking and receiving the drained fluid through the negative pressure in the drainage bag or the drainage ball relative to the drainage site of the patient.

Optionally, the balloon inflation-deflation device is an auxiliary bag or an auxiliary ball, which is in communication with the balloon via a balloon communication conduit and is configured to be collapsible by being pressurized to inflate the balloon and to be able to recover its volume by releasing the pressurization to deflate the balloon.

Optionally, the auxiliary bag or the auxiliary ball is communicated with the drainage bag or the drainage ball through a connecting pipeline, the connecting pipeline is provided with a first check valve, and a second check valve is further arranged between the auxiliary bag or the auxiliary ball and the atmosphere; and the auxiliary pocket or auxiliary ball is configured to: when the auxiliary bag or auxiliary ball is pressurized to collapse to inflate the balloon, the first check valve closes to prevent communication between the auxiliary bag or auxiliary ball and the drainage bag or drainage ball and the second check valve opens to allow communication between the auxiliary bag or auxiliary ball and the atmosphere; when the pressurization of the auxiliary bag or auxiliary ball is released to restore its volume to deflate the balloon, the first check valve opens to allow communication between the auxiliary bag or auxiliary ball and the drainage bag or drainage ball and to facilitate negative pressure of the drainage bag or drainage ball relative to the drainage site, while the second check valve closes to prevent communication between the auxiliary bag or auxiliary ball and the atmosphere.

Optionally, the balloon inflation-deflation device is a piston actuator comprising a piston chamber and a piston reciprocally movable within the piston chamber, the piston chamber being in communication with the balloon.

Optionally, the piston cavity is divided into a first part and a second part by a piston, the first part of the piston cavity is provided with a first port communicated with the balloon, the second part is provided with a second port communicated with the negative pressure drainage device and a third port communicated with the atmosphere, and drainage check valves and atmosphere check valves in opposite directions are respectively arranged at or in the second port and the third port; and the piston actuator is configured to: the balloon is inflated and the drainage check valve opens to allow communication of the second portion of the piston lumen with the negative pressure drainage device and to facilitate negative pressure of the negative pressure drainage device relative to the patient drainage site while the atmospheric check valve closes when the piston moves such that the volume of the first portion of the piston lumen decreases; the balloon deflates and the atmospheric check valve opens to allow communication between the second portion of the piston cavity and atmosphere while the drainage check valve closes when the piston moves such that the volume of the second portion of the piston cavity decreases.

Optionally, the first port is provided at or near one lengthwise end of the piston chamber, and the second and third ports are provided at or near the other lengthwise end of the piston chamber.

Optionally, the balloon inflation-deflation device has: a container having a circular cross-section; and two vanes located within the vessel and intersecting each other about a common or fulcrum and pivotally connected relative to each other; the two vanes being pivotable relative to each other while radially abutting against an inner surface of the vessel; the two blades crossing each other divide the internal volume of the vessel into four portions, namely a first radial portion and a second radially opposite portion, and a third radial portion and a fourth radially opposite portion; and at least one of the first and second radially opposed portions is provided with a first port communicating with the balloon, at least one of the third and fourth radially opposed portions is provided with a second and third port opening to atmosphere and the negative pressure drainage device, respectively, via an atmospheric check valve and a drainage check valve in opposite directions to each other.

Optionally, the two vanes are connected to each other via a spring on either side of the common or fulcrum, the two vanes being pivotable towards each other such that a reduction in volume of the first and second radially opposed portions causes the balloon to inflate while the drainage check valve opens and the atmospheric check valve closes; the two blades are also able to pivot away from each other due to the action of a spring, so that the volume recovery of the first and second radially opposite portions causes the balloon to deflate, while the drainage check valve closes and the atmospheric check valve opens.

Other features and aspects of the present invention will become apparent from the following description.

Drawings

Fig. 1 shows a draft tube system according to a first embodiment of the present invention;

FIG. 2 shows, in an enlarged view, the drainage tube of FIG. 1 with the balloon uninflated;

FIG. 3 shows, in an enlarged view, the drainage tube of FIG. 1 with the balloon inflated;

FIG. 4 shows a schematic view of a draft tube system according to a second embodiment;

FIGS. 5a, 5b and 5c illustrate different positions of a balloon inflation-deflation device of a drainage tube system according to a second embodiment; and

fig. 6 illustrates a balloon inflation-deflation device of a drainage tube system according to a third embodiment.

Detailed Description

Various embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, components having the same or similar functions are denoted by the same reference numerals.

In the following description, the term "distal" refers to a side or direction away from the caregiver and the term "proximal" refers to a side or direction closer to the caregiver.

[ first embodiment ]

FIG. 1 shows a drain tube system 100 according to a first embodiment of the present invention. The drainage tube system 100 includes a drainage tube 10, a drainage ball or bag 20 as a negative pressure drainage device, and an auxiliary ball or bag 30 as a balloon inflation-deflation device.

As shown in FIGS. 2-3, drain tube 10 is made of a flexible, biocompatible material. One or more drainage openings 10d are provided at or near the end of the drain tube 10 to allow the drained fluid to flow into the drain tube 10. In the embodiment shown in FIGS. 2-3, a plurality of drainage openings 10d are provided in the distal end wall of drain tube 10. However, those skilled in the art will appreciate that the location, number, form, etc. of the drainage openings is not limited to that shown in FIGS. 2-3, as long as the drained fluid is allowed to flow into the drain tube 10. For example, the distal end of the drain tube 10 may also be configured to be entirely open. Alternatively or additionally, one or more drainage openings 10d may also be provided in the circumferential wall near the distal end of the drain tube 10.

As also shown in FIGS. 2-3, one or more balloons 10a are provided at or near the distal end of drain tube 10, which can be inflated or deflated to collapse. The balloon 10a is arranged so as not to overlap the drainage opening 10d, i.e. so as not to impede the inflow of the drained fluid through the drainage opening 10 d.

The drainage tube 10a defines a drainage lumen 10b extending therethrough for proximally discharging the drained fluid introduced from the drainage opening 10 d. In addition, the drainage tube 10 is provided in the tube wall thereof with an auxiliary lumen 10c extending in parallel with and spaced apart from the drainage lumen 10b as a balloon communication line. The auxiliary lumen 10c is for gas communication of the balloon 10a and an auxiliary ball or bag 30 as a balloon inflation-deflation device for inflating or deflating the balloon to inflate or collapse it.

In the embodiment shown in FIGS. 2-3, auxiliary lumen 10c is disposed within the wall of drain tube 10 b. However, the auxiliary lumen 10c may take other forms. For example, the auxiliary lumen 10c may be an additional lumen provided around the entire peripheral wall of the drainage tube 10 and extending coaxially in parallel with and spaced apart from the drainage lumen 10 b; or auxiliary lumen 10c may be defined by another tube separate from drainage tube 10b and in gaseous communication with auxiliary ball or bag 30 and balloon 10 a.

The balloon 10a is also made of a flexible, biocompatible material. Preferably, balloon 10a is integrally formed with drain tube 10. For example, relative to drain tube 10, balloon 10a may be formed of a more flexible material to allow for expansion and contraction thereof; or may be formed of the same flexible material as drain tube 10, but of a thinner thickness to allow for expansion and contraction thereof.

In use, the distal end of the drain tube 10 is delivered to a drainage site within the patient, such as at or near a surgical site, and the drained fluid flows into the drain lumen 10b through the drain opening 10d, exiting proximally out of the body along the drain tube 10. Over time and with drainage, the drained fluid, e.g. blood, may coagulate, thereby clogging the drainage opening 10 d; furthermore, the drained fluid, e.g. tissue debris, may also accumulate in or near the drainage opening 10d, blocking the drainage opening 10 d; in addition, in some cases (e.g., after gastrointestinal surgery), the distal end of the drain tube 10 is positioned against a body organ (e.g., stomach or intestine), and these organs may peristaltically block the drain opening 10 d. Such blockage is clearly disadvantageous for postoperative drainage.

To alleviate or eliminate such occlusion, the user may inflate the balloon 10a through the auxiliary lumen 10c by means of a balloon inflation-deflation device to inflate it. As the balloon 10a is inflated, the balloon 10a pushes the fluid to be drained around the balloon 10a, acting like a stirrer on the fluid to be drained, or pushes the organ to move away from the drainage opening 10d, so that the blockage of the drainage opening 10d can be eliminated or alleviated.

Furthermore, particularly in the case where the balloon 10a is integrally formed with the drainage tube, the distal end of the drainage tube 10 can move a little distance proximally with the inflation of the balloon 10a due to the tensile force of the material. As the balloon 10 is deflated, the material tension is reduced and disappears, and the drain tube 10 moves distally back to the original position. Thus, by inflating and deflating the balloon 10a multiple times, the distal end of the drainage tube 10 reciprocates. This movement of the distal end of the drain tube 10 can, on the one hand, move the distal end of the drain tube 10 somewhat away from the location where the occlusion occurred, and on the other hand, also act to agitate the fluid being drained, thereby promoting the removal or relief of the occlusion.

In this embodiment, the negative pressure drainage device in communication with the drainage lumen 10b is a drainage ball or bag 20. The drainage ball or bag 20 is filled with a negative pressure relative to the patient's drainage site to draw the drained fluid through the drainage opening 10d into the drainage ball or bag 20 via the drainage lumen 10b by the negative pressure effect.

Those skilled in the art will appreciate that the drainage ball or bag 20 is merely an exemplary embodiment of a negative pressure drainage device, which may be other types of devices, as long as it is capable of drawing/draining the drained fluid through the drain tube. For example, the negative pressure drainage device may be composed of a pump for sucking the drained fluid and a separate container for containing the drained fluid.

The auxiliary ball or auxiliary bag 30 as the balloon inflating-deflating means of the present embodiment is described below with reference to fig. 1 again. As previously described, the auxiliary ball or auxiliary bag 30 serves as a balloon inflation-deflation device for inflating or deflating the balloon 10 a. Specifically, an auxiliary ball or bag 30 is in gaseous communication with balloon 10a through auxiliary lumen 10 c. For example, when the auxiliary ball or bag 30 is deflated by being pressurized/squeezed (e.g., manually) by a medical professional, the gas in the auxiliary ball or bag 30 is discharged to the balloon 10a, and the balloon 10a is inflated. When the pressurization/compression of the auxiliary ball or bag 30 is released, the auxiliary ball or bag 30 returns to its original volume and the balloon 10a in gaseous communication therewith deflates.

It will be appreciated by those skilled in the art that the balloon inflation-deflation device may be in other forms as long as it is capable of inflating and deflating the balloon 10 a.

Preferably, the auxiliary ball or bag 30 as the balloon inflation-deflation device is also connected with the drainage ball or bag 20 as the negative pressure drainage device through a connection line 40. A first check valve (one-way valve, drain check valve, not shown) is provided in the connection tube 40 for allowing only one-way communication between the auxiliary ball or bag 30 and the drain ball or bag 20. In addition, the auxiliary ball or the auxiliary bag 30 is also provided with a second check valve (one-way valve, atmospheric check valve, not shown) for allowing only one-way communication between the auxiliary ball or the auxiliary bag 30 and the atmosphere.

When the auxiliary bag or ball 30 is pressurized to collapse to inflate balloon 10a, the first check valve closes to prevent communication between the auxiliary bag or ball 30 and the drainage bag or ball 20 and the second check valve opens to allow communication between the auxiliary bag or ball 30 and the atmosphere; when the pressurization of the auxiliary bag or ball 30 is released to restore its volume to deflate the balloon, the first check valve opens to allow communication between the auxiliary bag or ball 30 and the drainage bag or ball 20 and to promote negative pressure in the drainage bag or ball 20 relative to the drainage site to promote drainage, while the second check valve closes to prevent communication between the auxiliary bag or ball and the atmosphere.

In this way, by pressurizing/squeezing the auxiliary bag or ball 30, on the one hand, inflation and deflation of the balloon 10a are controlled, eliminating or alleviating the blockage of the drain tube 10; on the other hand, the negative pressure of the drainage bag or the drainage ball 20 can be promoted, and the negative pressure drainage is promoted. Both of these effects are more beneficial for postoperative drainage.

[ second embodiment ]

In the following, with reference to fig. 4 and 5a-5c, a schematic of a draft tube system according to a second embodiment of the invention will be described.

Although two balloons 10a are shown in fig. 4, the structure, construction and connection of the drainage tube 10, the balloon 10a and the negative pressure drainage device (drainage ball or bag 20) of the second embodiment may be the same as those of the first embodiment, and the description thereof will not be repeated. Only the portion different from the first embodiment, that is, the piston actuator 50 as the balloon inflation-deflation device, will be described below.

An example of a piston actuator 50 includes, for example, a syringe having a piston chamber and a piston 50c, the piston 50c dividing the piston chamber into a first portion 50a and a second portion 50 b. A piston rod 50d extends from piston 50c out of the piston chamber and is connected to an operating handle 50e for reciprocating piston 50c under the operation of the medical professional. A return spring 50f may also be provided between the piston shank 50e and the cylinder wall defining the piston cavity for returning the piston 50c to the initial position. The piston actuator 50 is in gaseous communication with the balloon 10 via a first port 50 g. The piston actuator 50 is capable of inflating and deflating the balloon 10a to expand and contract it, thereby eliminating or alleviating a drainage blockage.

The piston actuator 50 also includes a second port 50i for communicating with the drain ball or drain bag 20 and a third port 50h for communicating with the main body. In the example shown in fig. 4, the first port 50g is provided in the first portion 50a of the piston chamber, and the second port 50i and the third port 50h are provided in the second portion 50b of the piston chamber. And a drainage check valve and an atmosphere check valve which are opposite in direction are respectively arranged at or in the second port and the third port.

Illustratively, the first port 50g is provided at or near one longitudinal end of the piston chamber, and the second and third ports 50i and 50h are provided at or near the other longitudinal end of the piston chamber.

Fig. 5a shows the piston actuator 50 in its initial position, in which the piston actuator is not operated.

Fig. 5b shows the piston actuator 50 in the second position (the inflated position) and fig. 5c shows the piston actuator 50 in the third position (the deflated position). Specifically, when the piston 50c moves such that the volume of the first portion of the piston lumen 50a decreases, the balloon 10a inflates and the drainage check valve opens to allow the second portion of the piston lumen to communicate with the negative pressure drainage device (drainage ball or drainage bag 20) and to promote negative pressure of the negative pressure drainage device relative to the drainage site to promote negative pressure drainage, while the atmospheric check valve closes, as shown in fig. 5 b; when the piston 50c moves in the opposite direction such that the volume of the second portion of the piston chamber decreases, the balloon deflates and the atmospheric check valve opens to allow communication between the second portion of the piston chamber and the atmosphere while the drain check valve closes, as shown in fig. 5 c.

[ third embodiment ]

Fig. 6 shows a balloon inflation-deflation device according to a third embodiment of the present invention, and the structure, configuration and connection of other components (the drainage tube 10, the balloon 10a and the negative pressure drainage device (the drainage ball or the drainage bag 20)) may be the same as those of the first embodiment and/or the second embodiment, and will not be described repeatedly.

The balloon inflation-deflation device of the third embodiment is a seesaw type actuator 60 having: a container 601, for example a ball or tube, of circular cross-section; and two blades 602, 603 located within the vessel 601 and intersecting each other about a common or fulcrum 604 and pivotally connected relative to each other. The two blades 602, 603 are able to pivot relative to each other while radially abutting against the inner surface of the vessel 601.

Two blades 602, 603 crossing each other divide the internal volume of said container 601 into four portions, namely a first radial portion 60a and a second radially opposite portion 60b, and a third radial portion 60c and a fourth radially opposite portion 60 d. At least one of the first radial portion 60a and the second radially opposite portion 60b is provided with a first port communicating with the balloon 10a, and at least one of the third radial portion 60c and the fourth radially opposite portion 60d is provided with a second port and a third port, which are open to the atmospheric and negative pressure drainage means, respectively, via an atmospheric check valve and a drainage check valve, which are opposite in direction to each other.

The two blades 602, 603 are also connected to each other via springs 605 on either side of the common axis or fulcrum 604. The two blades 602, 603 are configured to be pivotable towards each other such that the volume of the first radial portion 60a and the second diametrically opposed portion 60b is reduced such that the balloon 10a in communication therewith is inflated, at which time the drainage check valve opens to allow communication between the third radial portion 60c and/or the fourth diametrically opposed portion 60d and a drainage bag or a drainage ball as a negative pressure drainage device to facilitate negative pressure drainage, and the atmospheric check valve closes; in addition, the two blades 602, 603 are also configured to pivot away from each other due to the action of the spring, so that the volume of the first radial portion 60a and the second radially opposite portion 60b recovers causing the balloon 10a to deflate, at which time the drainage check valve closes, not allowing communication between the third radial portion 60c and/or the fourth radially opposite portion 60d and the drainage bag or drainage ball as a negative pressure drainage device, and the atmospheric check valve opens, allowing the third radial portion 60c and/or the fourth radially opposite portion 60d to communicate with the atmosphere.

The two blades 602, 603 or pivot or fulcrum 604 may be configured to extend axially outside of the container 601 (e.g., tube) for the healthcare worker to manipulate to pivot them toward one another or to release the manipulation to pivot them away from one another under the action of a spring. Alternatively, the two blades 602, 603 may be provided only inside the container 601 (e.g. transparent ball), the healthcare worker pressing directly on the contact of the blades with the container, thereby squeezing the blades to pivot towards each other, or releasing the squeezing to pivot them away from each other under the action of the spring.

[ other examples ]

While various embodiments of the balloon inflation-deflation device have been described above, other balloon inflation-deflation devices, such as bellows or bellows, may be used in addition to the above embodiments, as long as the balloon inflation-deflation device is capable of inflating and deflating the balloon. Preferably, the balloon inflation-deflation device is further capable of facilitating negative pressure drainage by the negative pressure drainage device by being connected to the negative pressure drainage device and inflating or deflating the balloon.

Claims (13)

1. A drain tube system, comprising:

a drainage tube having a distal end portion, a drainage opening at the distal end portion, and a drainage lumen defined therein, the drainage tube configured to drain drained fluid at a patient drainage site outwardly through the drainage lumen and via the drainage opening;

characterized in that the drainage tube system further comprises:

a balloon located at a distal end portion of the drainage tube and non-overlapping with the drainage opening; and

a balloon inflation-deflation device in gaseous communication with the balloon, the balloon inflation-deflation device configured to enable inflation and deflation of the balloon.

2. The drain tube system of claim 1 wherein the balloon is integrally formed with the drain tube such that a distal end portion of the drain tube is movable proximally with inflation of the balloon.

3. The drainage tube system of claim 1 or 2 wherein a balloon communication conduit is formed or disposed about the drainage tube that places the balloon in gaseous communication with the balloon inflation-deflation device and isolated from the drainage lumen.

4. The drainage tube system of claim 3, wherein a negative pressure drainage device for generating a negative pressure relative to a pressure at the patient drainage site is connected to the drainage lumen to effect drainage by negative pressure action.

5. The drainage tube system of claim 4, wherein the balloon inflation-deflation device is further operably connected with the negative pressure drainage device to facilitate negative pressure generation of the negative pressure drainage device while inflating or deflating the balloon.

6. The drainage tube system of claim 5, wherein the negative pressure drainage device is a drainage bag or a drainage ball in communication with the drainage lumen for drawing and receiving the drained fluid via negative pressure within the drainage bag or the drainage ball relative to the drainage site of the patient.

7. The drainage tube system of claim 6 wherein the balloon inflation-deflation device is an auxiliary bag or an auxiliary ball in communication with the balloon via a balloon communication conduit and configured to be collapsible by being pressurized to inflate the balloon and to be able to recover its volume by releasing the pressurization to deflate the balloon.

8. The drain tube system according to claim 7, characterized in that the auxiliary bag or auxiliary ball communicates with the drain bag or drain ball via a connection line provided with a first check valve, and a second check valve is further provided between the auxiliary bag or auxiliary ball and the atmosphere; and

the auxiliary pocket or auxiliary ball is configured to: when the auxiliary bag or auxiliary ball is pressurized to collapse to inflate the balloon, the first check valve closes to prevent communication between the auxiliary bag or auxiliary ball and the drainage bag or drainage ball and the second check valve opens to allow communication between the auxiliary bag or auxiliary ball and the atmosphere; when the pressurization of the auxiliary bag or auxiliary ball is released to restore its volume to deflate the balloon, the first check valve opens to allow communication between the auxiliary bag or auxiliary ball and the drainage bag or drainage ball and to facilitate negative pressure of the drainage bag or drainage ball relative to the drainage site, while the second check valve closes to prevent communication between the auxiliary bag or auxiliary ball and the atmosphere.

9. The catheter system of claim 5, wherein the balloon inflation-deflation device is a piston actuator comprising a piston lumen and a piston reciprocable within the piston lumen, the piston lumen in communication with the balloon.

10. The drainage tube system of claim 9 wherein the piston chamber is divided into a first portion and a second portion by a piston, the first portion of the piston chamber having a first port in communication with the balloon, the second portion having a second port communicable with the negative pressure drainage device and a third port communicable with atmosphere, and wherein oppositely directed drainage and atmosphere check valves are disposed at or in the second and third ports, respectively; and

the piston actuator is configured to: the balloon is inflated and the drainage check valve opens to allow communication of the second portion of the piston lumen with the negative pressure drainage device and to facilitate negative pressure of the negative pressure drainage device relative to the patient drainage site while the atmospheric check valve closes when the piston moves such that the volume of the first portion of the piston lumen decreases; the balloon deflates and the atmospheric check valve opens to allow communication between the second portion of the piston cavity and atmosphere while the drainage check valve closes when the piston moves such that the volume of the second portion of the piston cavity decreases.

11. The drain tube system of claim 10, wherein the first port is disposed at or near one lengthwise end of the piston chamber, and the second and third ports are disposed at or near the other lengthwise end of the piston chamber.

12. The drainage tube system of claim 5, wherein the balloon inflation-deflation device has: a container having a circular cross-section; and two vanes located within the vessel and intersecting each other about a common or fulcrum and pivotally connected relative to each other; the two vanes being pivotable relative to each other while radially abutting against an inner surface of the vessel;

the two blades crossing each other divide the internal volume of the vessel into four portions, namely a first radial portion and a second radially opposite portion, and a third radial portion and a fourth radially opposite portion; and

at least one of the first and second radially opposed portions is provided with a first port communicating with the balloon, at least one of the third and fourth radially opposed portions is provided with a second and third port opening to atmosphere and the negative pressure drainage device, respectively, via an atmospheric check valve and a drainage check valve in opposite directions to each other.

13. The drain tube system of claim 12, wherein the two vanes are connected to each other via a spring on either side of the common axis or fulcrum, the two vanes being pivotable toward each other such that a reduction in volume of the first and second radially opposed portions causes the balloon to expand while the drainage check valve opens and the atmospheric check valve closes; the two blades are also able to pivot away from each other due to the action of a spring, so that the volume recovery of the first and second radially opposite portions causes the balloon to deflate, while the drainage check valve closes and the atmospheric check valve opens.

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