JP2011055920A - Low-pressure retaining suction apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-pressure retaining suction apparatus capable of preventing a sucked bodily fluid from infiltrating into a suction pump to prevent trouble in an apparatus body caused by infiltration of the bodily fluid, and capable of activating means such as for sounding an alarm. <P>SOLUTION: The low-pressure retaining suction apparatus sucks the bodily fluid such as blood stored in the body cavity of a patient while retaining low pressure. The low-pressure retaining suction apparatus includes: sucking means for sucking the bodily fluid from the body cavity of the patient; drainage storing means for storing the bodily fluid sucked by the sucking means: communicating means with air-tightness and liquid-tightness for making the sucking means communicate with the drainage storing means; bodily fluid infiltration preventing means disposed in the communicating means for preventing the bodily fluid from infiltrating into the sucking means by adsorbing or absorbing the bodily fluid infiltrating into the communicating means; pressure detecting means for detecting the fluid pressure generated in the communicating means by the sucking means and the pressure in the bodily fluid infiltration preventing means; and control means for adjusting the suction pressure of the sucking means and determining whether the pressure value in the bodily fluid infiltration preventing means detected by the pressure detecting means is a preset pressure or not. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a low-pressure continuous suction device that continuously sucks low-pressure body fluid such as blood accumulated in a body cavity of a patient.

  In chest and abdominal surgery, a low-pressure continuous aspirator is used to maintain a constant internal pressure after a thoracotomy and to aspirate and remove body fluid discharged from the surgical site after surgery.

  In recent years, this low-pressure continuous suction device can be driven by a household power supply or built-in battery, so that it can be used immediately if a suction device body and a disposable drainage tank are prepared. Electric low-pressure continuous suction devices that are easy to handle are in widespread use. The following literature is known as such an electric low-pressure continuous suction device.

JP 2000-300662 A

  By the way, in the conventional low-pressure automatic suction device, the user visually confirms how much body fluid is sucked and stored in the drainage tank. Then, the user grasps that the body fluid has been sucked up to the vicinity of the storable capacity of the drainage tank by a reference line or the like attached to the drainage tank, and appropriately replaces the drainage tank or removes the sucked body fluid. Disposing.

  Therefore, if the user neglects to visually check and the body fluid is sucked in excess of the storable capacity of the drainage tank, the body fluid infiltrates from the drainage tank to the suction pump via a suction tube or the like. A situation may occur in which the suction pump fails and stops. In addition, the suction pump and the suction tube that have once entered the body fluid in this way are difficult to be used due to contamination thereof.

  In order to solve such a problem, in the low-pressure continuous aspirator currently on the market, in addition to the drainage tank, a subtank for storing body fluid is installed inside the aspirator body so that the user can visually check the drainage tank. Even if it is neglected, measures are taken to prevent bodily fluids that exceed the storable capacity from entering the suction tube from the suction pump and the sub-tank to the suction pump.

  However, even if such measures are taken, if body fluid exceeding the storage capacity of the sub-tank inside the aspirator body is sucked, after all, the suction pump and the suction from the sub-tank to the suction pump Body fluid will penetrate into the tube, which is not a fundamental solution.

  The present invention has been made in view of such a situation, and it is possible to take measures to prevent a body fluid that has been sucked from entering the suction pump and to prevent a malfunction of the apparatus main body due to the intrusion of the body fluid. An object of the present invention is to provide a low-pressure continuous suction device that can be used.

  In order to solve the above-mentioned problems, according to a first main aspect of the present invention, there is provided a low-pressure continuous suction device for continuously sucking a body fluid such as blood accumulated in a patient's body cavity at a low pressure, wherein the body fluid is drawn from the patient's body cavity. Suction means for suction, drainage storage means for storing body fluid sucked by the suction means, communication means for communicating the suction means and the drainage storage means, and having airtightness and liquid tightness; A body fluid intrusion preventing means that is provided in the communication means and that adsorbs or absorbs body fluid that has entered the communication means to prevent the body fluid from entering the suction means; and a fluid pressure generated in the communication means by the suction means; A pressure detecting means for detecting the pressure in the body fluid intrusion preventing means; and a pressure value in the body fluid intrusion preventing means detected by the pressure detecting means is set in advance by adjusting the suction pressure of the suction means. Low persistence aspirator is provided, characterized in that and a control means for determining whether the setting pressure that is.

  According to such a configuration, in the low-pressure continuous suction device, even if the user neglects to visually check the storage capacity of the storage tank, the body fluid sucked in more than the storage capacity of the storage tank enters the suction pump. Therefore, it is possible to prevent failure of the apparatus main body due to intrusion of body fluid.

  Further, it is not necessary to install a sub-tank in the apparatus main body for supplementary storage of body fluid sucked in excess of the storage capacity of the storage tank, and the apparatus main body can be expected to be downsized.

  According to one embodiment of the present invention, in such a low-pressure continuous suction device, the body fluid intrusion preventing means has liquid tightness.

  According to another embodiment of the present invention, in the above-mentioned low-pressure continuous suction device, the low-pressure continuous suction device further has an alarm means for generating an alarm, and the alarm means is configured to enter the body fluid. An alarm is generated based on the pressure value in the prevention means and the pressure value in the communication means.

  In this case, the control means compares the pressure value in the body fluid intrusion preventing means with the pressure value in the communication means, and when the pressure value in the body fluid intrusion prevention means is higher than the pressure value in the communication means, It is preferable that a signal for generating an alarm is transmitted to the alarm unit, and the alarm unit generates an alarm when a signal for generating the alarm is received. .

  According to another embodiment of the present invention, in the above-described low-pressure continuous suction device, the suction means stops suction based on the pressure value in the body fluid intrusion prevention means and the pressure value in the communication means. Is.

  In this case, the control means compares the pressure value in the body fluid intrusion preventing means with the pressure value in the communication means, and when the pressure value in the body fluid intrusion prevention means is higher than the pressure value in the communication means, A signal for stopping suction is transmitted to the suction means, and the suction means preferably stops suction when receiving a signal for stopping the suction. .

  According to a second main aspect of the present invention, there is provided a communication tube for use in the above-described low-pressure continuous suction device, which is installed in the low-pressure continuous suction device and receives body fluid from the body cavity of the patient using the low-pressure continuous suction device. The suction means for suction and the drainage storage means for storing the body fluid sucked by the suction means are communicated, and further, the communication means having airtightness and liquid tightness, and the communication means are provided in the communication means. And a body fluid intrusion preventing unit that adsorbs or absorbs the body fluid that has entered the body and prevents the body fluid from entering the suction unit.

  According to one embodiment of the present invention, in such a communication tube, the body fluid intrusion preventing means has liquid tightness.

  It should be noted that the features of the present invention other than those described above and the remarkable actions and effects will become clear to those skilled in the art with reference to the following embodiments and drawings of the present invention.

FIG. 1 is a schematic configuration diagram illustrating a configuration of a low-pressure continuous suction device 1 according to the present embodiment. FIG. 2 is an enlarged configuration diagram showing the configuration of the body fluid intrusion prevention filter 1 according to the present embodiment. FIG. 3 is a flowchart for explaining the operation of the low-pressure continuous suction device according to this embodiment.

  Hereinafter, an embodiment and an example of the present invention will be described with reference to the accompanying drawings.

(overall structure)
FIG. 1 is a schematic configuration diagram illustrating a configuration of a low-pressure continuous suction device 1 according to the present embodiment.
The low-pressure continuous suction device 1 has a drainage tank (drainage storage means) 2 and an aspirator body 4 that is liquid-tight and airtightly connected to the drainage tank 2 and a suction tube (communication means) 3. The aspirator body 4 includes a control unit (control means) 5, a suction pump (suction means) 6, a pressure sensor (pressure detection means) 7, an alarm (alarm means) 8, and a body fluid intrusion prevention filter ( Body fluid intrusion prevention means) 9.

  In addition, below, although the structure of the low voltage | pressure continuous suction device 1 in this embodiment is demonstrated, it abbreviate | omits about the basic structure of a low voltage | pressure continuous suction device.

  The drainage tank 2 has at least one connecting tube connecting portion (not shown) for connecting a connecting tube 10 connected to a body cavity of a patient who uses the low-pressure continuous suction device 1. The body fluid discharged from the patient is stored. Further, the drainage tank 2 has a suction tube connecting portion (not shown) for connecting a suction tube 3 connected to a suction pump 6 described later in at least one portion different from the connecting tube connecting portion.

  The connection between the drainage tank 2 and the connecting tube 10 and the connection between the drainage tank 2 and the suction tube 3 are preferably connected so that the sealed state of the drainage tank 2 is maintained.

  The suction pump 6 is provided inside the aspirator body 4 and generates fluid pressure (negative pressure) in the suction tube 3 by being driven and sucked. The suction pump 6 sucks the body fluid discharged from the patient body cavity by the generated fluid pressure. The suction pump 6 according to the present invention is preferably a type or type of pump normally used in a low-pressure continuous suction device, but may be any type or type of pump as long as it is a pump capable of suction. . The suction pump 1 may perform suction based on a pump drive voltage transmitted from the control unit 5 described later, or can perform suction while keeping a suction pressure preset by the user constant.

  The pressure sensor 7 detects the fluid pressure generated in the suction tube 3 by the suction pump 6. The pressure sensor 7 transmits the detected fluid pressure in the suction tube 3 to the control unit 5 described later. The pressure sensor 7 also detects a pressure in a body fluid intrusion prevention filter 9 described later. The detected pressure value in the body fluid intrusion prevention filter 9 is also transmitted to the control unit 6 in the same manner. Further, the pressure sensor 7 may always detect the pressure in the body fluid intrusion prevention filter 9 and the suction tube 3 while the suction pump 6 is performing suction, and may intermittently detect, for example, 1 minute or The pressure may be detected every certain time such as every 30 seconds.

  The alarm 8 emits a predetermined alarm sound when a signal for issuing an alarm is received from the control unit 6 described later. Further, the alarm 8 may be prepared with a plurality of types of alarm sounds as the alarm sound, and the alarm sound generated may be changed depending on the type of signal transmitted from the control unit 6.

  The body fluid intrusion prevention filter 9 is installed at an arbitrary location of the suction tube 3 between the drainage tank 2 and the suction pump 6. This installation location may be inside or outside the aspirator body 4, but when replacing the body fluid intrusion prevention filter 9 for each patient, it can be easily replaced by installing it outside. It becomes. The body fluid intrusion prevention filter 9 preferably has liquid tightness and is configured to adsorb or absorb liquid while allowing gas to pass through. In addition, as shown in FIG. 2, the connection between the body fluid intrusion prevention filter 9 and the suction tube 3 is preferably performed by a connecting member 11 such as a luer lock so that it can be easily attached and detached.

The control unit 5 compares the pressure in the body fluid intrusion prevention filter 9 detected by the pressure sensor 7 with the pressure in the suction tube 3, and the pressure in the body fluid intrusion prevention filter 9 is higher than a preset set allowable value. Or send a signal to alarm 8 to generate an alarm if low. Alternatively, a normal value or an allowable value is set in advance instead of the pressure in the suction tube 3, and the pressure in the body fluid intrusion prevention filter 9 detected by the pressure sensor 7 deviates from the preset normal value or allowable value. A signal may be transmitted to the alarm 8 so as to generate an alarm when an abnormal value is indicated. For example, when the normal pressure value (normal value) in the body fluid intrusion prevention filter 1 is −1 cmH ₂ O, the negative pressure or the positive pressure (for example, −100 cmH ₂ O, or 100 cmH ₂ O or the like), the signal is transmitted.

Note that the type of signal transmitted by the control unit 5 may vary depending on the type of abnormality. For example, when the pressure value in the suction tube 3 or a preset normal value is −1 cmH ₂ O, the first signal is obtained when the pressure value in the body fluid intrusion prevention filter 9 is 30 cmH ₂ O or more and less than 50 cmH ₂ O. The second signal may be transmitted when it is 50 cmH ₂ O or more and less than 100 cmH ₂ O, and the third signal may be transmitted when it is 100 cmH ₂ O or more.

  Further, the control unit 5 can determine an optimum pump drive voltage based on the fluid pressure in the suction tube 3 transmitted from the pressure sensor 7 and transmit the pump drive voltage to the above-described suction pump 6. . For example, the control unit 5 sets a predetermined suction pressure, and sets the suction pressure sucked by the suction pump 6 when the suction pressure sucked by the suction pump 6 becomes equal to or higher than the predetermined suction pressure. The suction pressure can be adjusted to be lower than the suction pressure.

(Built-in prevention filter)
FIG. 2 is an enlarged configuration diagram showing the configuration of the body fluid intrusion prevention filter 9 according to the present embodiment.
In this figure, reference numeral 9 denotes a body fluid intrusion prevention filter. As shown in this figure, the body fluid intrusion prevention filter 9 constitutes a filter unit 13 together with a connecting member 11 such as a luer lock and a filter case 12. The filter unit 13 preferably has a connecting member 11 such as a luer lock at a connection portion with the suction tube 3 so that the filter unit 13 can be easily attached to and detached from the suction tube 3.

  The pressure sensor 7 is configured to detect both the pressure in the body fluid intrusion prevention filter 9 and the pressure in the suction tube 3 (not shown). This pressure sensor 7 detects the pressure in the body fluid intrusion prevention filter 9 as the first pressure detection point, and detects the pressure in the suction tube 3 between the drainage tank 2 and the body fluid intrusion prevention filter 9 as the second pressure detection point. However, the pressure detection points detected by the pressure sensor 7 are not limited to the above two points, and can be detected at a plurality of points. The pressure sensor 7 may detect the pressure in the suction tube 3 between the suction pump 6 and the body fluid intrusion prevention filter 9.

  Note that the configuration of the filter unit 13 is not limited to that shown in the figure as long as it has the body fluid intrusion prevention filter 9 having liquid tightness.

(Operation)
Next, the operation of the low-pressure continuous suction device according to this embodiment will be described with reference to the flowchart of FIG. The following processes are executed by the control unit 5, the suction pump 6, the pressure sensor 7, and the alarm 8. In addition, the following description will focus on the function of the body fluid intrusion prevention filter 9 according to the present embodiment, and a description of the basic operation as a low-pressure continuous suction device will be omitted. Furthermore, each code | symbol S1-S5 in a figure respond | corresponds to each step S1-step S5 in the following description.

  First, in step S1, the suction pump 6 starts to suck body fluid in the patient body cavity via the suction tube 3 or the like. The pressure sensor 7 detects the pressure in the body fluid intrusion prevention filter 9 and the pressure in the suction tube 3 while the suction pump 6 starts suction and continues suction (step S2).

  Thereafter, the pressure value in the body fluid intrusion prevention filter 9 detected in step S2 and the pressure value in the suction tube 3 are transmitted to the control unit 5, and the control unit 5 in the body fluid intrusion prevention filter 9 and the pressure in the suction tube 3 are transmitted. The pressure value is compared (step S3).

In the comparison by the control unit 5, the pressure value in the body fluid intrusion prevention filter 9 is a high value (positive pressure) within the first set allowable value with reference to the pressure value in the suction tube 3, or the second set allowable value. (For example, when the pressure value in the suction tube 3 is −1 cmH ₂ O, the pressure value in the body fluid intrusion prevention filter 9 is a value between −30 and 30 cmH ₂ O). ), The suction pump 6 continues the suction. The pressure sensor 7 detects the pressure in the body fluid intrusion prevention filter 9 and the pressure in the suction tube 3 continuously or intermittently. As will be described later, the pressure value in the body fluid intrusion prevention filter 9 is the pressure in the suction tube 3. Steps S <b> 2 to S <b> 3 are repeated until a value (positive pressure) higher than the set allowable value is shown with the value as a reference.

Further, in the comparison by the control unit 5 in step S3, when the pressure value in the body fluid intrusion prevention filter 9 shows a value (positive pressure) higher than the set allowable value with reference to the pressure value in the suction tube 3 (for example, the suction tube when the pressure value at 3 is -1cmH ₂ O, if the pressure value in a body fluid intrusion prevention filter 9 showed 50 cm H ₂ O or more values), the control unit 5, to the alarm 8, issues an alarm The alarm 8 that transmits the signal for receiving the signal for issuing this warning generates a warning (step S4).

  Simultaneously with the transmission of a signal for issuing an alarm for the alarm 8, the control unit 5 transmits a signal for stopping the suction to the suction pump 6 and receives the signal for stopping the suction. The pump 6 stops the suction (step S5).

In this embodiment, it is described that transmission of a signal for issuing a warning for the alarm 8 by the control unit 5 and transmission of a signal for stopping the suction to the suction pump 6 occur in parallel. However, the suction pump 6 may stop the suction in series using the generation of an alarm by the alarm 8 as a signal. Further, for example, in the comparison by the control unit 5 in step S3, the pressure value in the body fluid intrusion prevention filter 9 is greater than or equal to the first set allowable value and less than the second set allowable value with reference to the pressure value in the suction tube 3 (for example, , 30 cmH ₂ O or more and less than 50 cmH ₂ O), a signal for issuing a warning to the alarm 8 is transmitted, and the second set allowable value or more (for example, 50 cmH ₂ O or more) When a value is indicated, a signal for issuing an alarm to the alarm 8 is transmitted and a signal for stopping the suction is transmitted to the suction pump 6. The stoppage of suction by the suction pump 6 may be determined by the degree of difference in the detected pressure values.

  In addition, this invention is not limited to the said one Embodiment, A various deformation | transformation is possible in the range which does not change the summary of invention.

  For example, the suction tube 3 between the drainage tank 2 and the body fluid intrusion prevention filter 9 may be provided with a sub tank (not shown) for storing body fluid overflowing from the drainage tank 2. In addition, in order to prevent the suction tube 3 from being in a positive pressure state, a positive pressure prevention valve (not shown) can be provided in the suction tube 3.

  In addition, it goes without saying that the present invention can be variously modified.

DESCRIPTION OF SYMBOLS 1 ... Low-pressure continuous suction device 2 ... Drain tank 3 ... Suction tube 4 ... Suction device body 5 ... Control part 6 ... Suction pump 7 ... Pressure sensor 8 ... Alarm 9 ... Body fluid infiltration prevention filter 10 ... Connecting tube 11 ... Connecting member 12 ... Filter case 13 ... Filter unit

Claims (8)

A low-pressure continuous suction device that continuously sucks low-pressure body fluid such as blood accumulated in a patient's body cavity,
Suction means for sucking body fluid from the body cavity of the patient;
Drainage storage means for storing body fluid sucked by the suction means;
Communicating means for communicating the suction means and the drainage storage means, and having air tightness and liquid tightness;
A bodily fluid intrusion preventing means provided in the communicating means, for adsorbing or absorbing bodily fluid that has entered the communicating means to prevent intrusion of bodily fluid into the suction means;
Pressure detecting means for detecting the fluid pressure generated in the communicating means by the suction means and the pressure in the body fluid intrusion preventing means;
Control means for adjusting the suction pressure of the suction means and determining whether the pressure value in the body fluid intrusion prevention means detected by the pressure detection means is a preset set pressure;
A low-pressure continuous suction device characterized by comprising: The low-pressure continuous suction device according to claim 1,
The low-pressure continuous suction device, wherein the body fluid intrusion preventing means has liquid tightness. The low pressure continuous aspirator according to claim 1, wherein the low pressure continuous aspirator further comprises:
Having an alarm means for generating an alarm,
The alarm means generates an alarm based on a pressure value in the body fluid intrusion preventing means and a pressure value in the communication means. The low-pressure continuous suction device according to claim 3,
The control means compares the pressure value in the body fluid intrusion preventing means with the pressure value in the communication means, and when the pressure value in the body fluid intrusion preventing means is higher than the pressure value in the communication means, the alarm means Is to send a signal to generate an alarm,
The low-pressure continuous suction device, wherein the alarm means generates an alarm when a signal for generating the alarm is received. The low-pressure continuous suction device according to claim 1,
The low-pressure continuous suction device, wherein the suction means stops suction based on a pressure value in the body fluid intrusion prevention means and a pressure value in the communication means. The low-pressure continuous suction device according to claim 5,
The control means compares the pressure value in the body fluid intrusion prevention means with the pressure value in the communication means, and when the pressure value in the body fluid intrusion prevention means is higher than the pressure value in the communication means, the suction means To send a signal to stop the suction,
The low-pressure continuous suction device, wherein the suction means stops suction when receiving a signal for stopping the suction. A communication tube used in the low-pressure continuous suction device according to claim 1,
A suction unit that is installed in the low-pressure continuous suction device and sucks body fluid from a body cavity of a patient using the low-pressure continuous suction device, and a drainage storage unit that stores body fluid sucked by the suction unit, and Communication means having air tightness and liquid tightness;
A bodily fluid intrusion preventing means provided in the communicating means, for adsorbing or absorbing bodily fluid that has entered the communicating means to prevent intrusion of bodily fluid into the suction means;
A communication tube characterized by comprising: The communication tube according to claim 7, wherein
The communication tube according to claim 1, wherein the body fluid intrusion preventing means has liquid tightness.

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