JP5165496B2 - Liposuction equipment - Google Patents

Description

  The present invention relates to a liposuction apparatus.

  In recent years, research using adipose tissue-derived cells separated from adipose tissue for regenerative medicine has been conducted. The collection of adipose tissue from a living body is a method in which the adipose tissue in the living body is loosened and softened with a solution containing physiological saline as a main component (hereinafter referred to as a tumescent solution), and the fat and the tumescent solution are simultaneously sucked using a cannula. Is used.

  Conventional liposuction devices are designed for the purpose of removing adipose tissue from the body and do not have a function of measuring or controlling the amount of suction. On the other hand, when using collected adipose tissue for research, especially when it is desired to maintain sterility, it is difficult to remove only unnecessary amounts from the container after collection. There is a demand to collect only a desired amount of fat with precise control.

  The amount of collected fat is calculated from the position of the interface between the fat and the tumescent liquid and the weight when the mixing ratio of both is set to 1: 1, for example, but these methods vary depending on the measurer, It is difficult to measure the exact suction volume of fat alone. In order to maintain the sterility of the aspirated fat, a method capable of measuring the aspiration amount in a non-contact manner from the outside of the container for accommodating the fat and the piping on the way is required.

  On the other hand, when the exhaust amount of the exhaust pump for sucking fat is the same as the diameter of the suction port of the cannula used, the suction amount per unit time is almost constant, and the suction amount is reduced by the exhaust time of the exhaust pump. Can be controlled. However, in actual work, since suction is performed while manipulating the position of the cannula, there is a time during which the suction port is removed from the living body and fat is not sucked. Therefore, it is difficult to accurately control the suction amount only by the pump operation time, and it is possible to measure only the net exhaust time by excluding the pump exhaust time (idle) when fat is not sucked. It has become a challenge.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a liposuction apparatus that can accurately measure and control the amount of fat sucked.

In order to achieve the above object, the present invention provides the following means.
The present invention relates to a cylindrical suction part having a suction port for sucking fat, a storage container connected to the suction part for storing the sucked fat, and reducing the pressure in the suction part from the suction port to the storage container. A pump for sucking the fat in, a sensor provided in the vicinity of the suction port for detecting contact of the fat in the vicinity of the suction port, and a suction time by the pump based on a detection signal by the sensor A liposuction apparatus is provided that includes a control unit that measures and stops suction by the pump when a predetermined suction time is reached.

  According to the present invention, the sensor is operated and the suction part is inserted into a site of adipose tissue in the living body. When the pump is operated, fat is sucked from the suction port and accumulated in the storage container, and the fat can be collected from the living body.

  In this case, the control unit measures the suction time only when the sensor detects contact between the vicinity of the suction port and fat. Therefore, by measuring the amount of fat sucked per unit time in advance, the pump suction time (idle) when not sucking fat is not measured. Therefore, fat suction is performed based on the measured suction time. You can know the amount. Then, a desired amount of fat can be accurately aspirated by stopping the aspiration by the pump after a predetermined time has elapsed.

In the above invention, the sensor may be a capacitance sensor that has two electrodes and detects a capacitance between the electrodes, and one of the electrodes may be disposed in the vicinity of the suction port.
For example, the other electrode is installed in another part of the living body. Then, by observing the change in the capacitance between the electrodes, the contact between the vicinity of the suction port and the fat can be accurately detected with good response.

In the above invention, the control unit determines that the suction port is in contact with fat when the capacitance detected by the sensor is within a predetermined range, and sets the suction time by the pump. You may measure.
By doing so, it is only necessary to operate the pump only when fat is sucked, so that waste of electric power due to idling can be saved.

Moreover, in the said invention, you may alert | report this when the said control part reaches | attains predetermined | prescribed suction | inhalation time.
By doing so, it is possible to know that the suction is completed even if the operator does not constantly monitor the operation of the control unit and the pump.

  According to the present invention, it is possible to accurately measure and control the amount of sucked fat.

A liposuction apparatus 1 according to a first embodiment of the present invention will be described below with reference to FIGS.
As shown in FIG. 1, the liposuction apparatus 1 according to the present embodiment includes a cannula (suction unit) 2 that sucks fat, a storage container 3 that stores the sucked fat, a cannula 2, and a storage container 3. A suction tube 4 connected to the pump, a pump 5 arranged outside the container 3, a capacitance sensor (sensor) 6, and a control unit 7 for controlling the operation of the pump 5.

The cannula 2 includes a cylindrical and stainless steel insertion portion 2a and a grip portion 2b that an operator grips and operates the insertion portion 2a. At the distal end of the insertion portion 2a, for example, a suction port 2c having a diameter of 4 mm is provided. Is open.
The pump 5 is an exhaust pump, and is connected to the inside of the storage container 3 through a pipe 5a, and exhausts the interior of the storage container 3 with a certain exhaust amount to reduce the pressure.

  Further, an exhaust valve 5b and a foot switch 5c for opening and closing the exhaust valve 5b are provided in the middle of the pipe 5a so that the exhaust valve 5b is opened only while the foot switch 5c is stepped on. It has become. When the foot switch 5c is stepped on while the pump 5 is operating, the inside of the storage container 3, the suction tube 4 and the cannula 2 is depressurized, and the fat passes from the suction port 2c through the suction tube 4 into the storage container 3. Is sucked.

  The capacitance sensor 6 includes two electrodes 6a and 6b and an AC power source 6c that applies an AC voltage to the electrodes 6a and 6b. The AC voltage is applied to the electrodes 6a and 6b by the AC power source 6c. The capacitance between the electrodes 6a and 6b is detected. One electrode 6a is connected to a part of the insertion portion 2a of the cannula 2, and the entire insertion portion 2a functions as an electrode. The other electrode 6b is brought into contact with the body surface of the living body from which the fat is collected.

The control unit 7 is connected to the pump 5, the capacitance sensor 6, and the foot switch 5c. The control unit 7 measures the suction time t only when the foot switch 5c is stepped on and the capacitance value detected by the capacitance sensor 6 is within a predetermined range, and the integration of the suction time t is set in advance. and it is adapted to stop the pump 5 when it reaches the set time t ₀ which is.

A procedure for collecting fat using the liposuction device 1 configured as described above will be described below with reference to FIGS. 2 and 3, taking as an example the case of sucking fat from the body of the subject A.
In advance, the pump 5 is operated with a predetermined exhaust amount to suck fat, and the suction amount per unit time is measured from the suction amount.

  In addition, the capacitance value when one electrode 6b is in contact with the body surface of the subject A and the insertion portion 2a of the cannula 2 is in contact with the fat in the body of the subject A is measured in advance. Based on the measured value, for example, when a capacitance value is detected within a range of measured value ± 5% with a measurement error of 5%, the control unit 7 causes the suction port 2c to be converted into fat in the living body. It is determined that the contact time is determined and the suction time t is measured.

First, one electrode 6b is fixed in contact with the body surface of the subject A, for example, a finger. Then, the control unit 7 sets the set time t ₀ to be measured, an AC voltage is applied to the electrodes 6a, 6b.
Subsequently, the pump 5 is actuated (step S101), and when the operator steps on the foot switch 5c by inserting the insertion portion 2a into the adipose tissue portion of the subject A from the tip (step S102), the exhaust valve 5b is opened. (Step S103). The control unit 7 determines whether or not the capacitance value detected by the capacitance sensor 6 is within the set range (step S104), and if it is within the range, in step S105 shown in FIG. The controller 7 starts measuring the suction time t (step S11).

  In step S105, when the foot switch 5c is opened during the measurement of the suction time t (step S12), the exhaust valve 5b is closed (step S13), and the measurement of the suction time t is interrupted (step S14), and again. When the foot switch 5c is stepped on, the exhaust valve 5b is opened (step S15).

Subsequently, it is determined whether the capacitance value detected by the capacitance sensor 6 is within the set range (step S16). If the capacitance value is out of the range, the measurement of the suction time t is interrupted (step S17). The measurement of the suction time t is restarted when
When the integration of the suction time t measured by the control unit 7 reaches the set time t ₀ (step S106), the pump 5 is stopped by the control unit 7 (step S107), and the fat suction is finished.

Thus, according to the present embodiment, the suction time t is measured only when the detected capacitance value is within the set range, that is, when the suction port 2c is in contact with fat in the living body. Therefore, the amount of fat sucked from the suction time t can be accurately measured. Then, by stopping the suction when the total suction time t elapses the set time t ₀ , it is possible to accurately adjust the suction amount and collect a desired amount of fat.

  In addition, the pump 5 and the capacitance sensor 6 are provided outside the storage container 3 and the suction tube 4, and the suction amount of fat is measured from the outside in a non-contact manner, so that the inside of the storage container 3 and the suction tube 4 is measured. Fat sterility can be maintained. At the same time, only the disposable container 3 and the suction tube 4 can be exchanged.

  In the above embodiment, the control unit measures the suction time based on the operation of the foot switch and the detected capacitance value, but instead, based on the detected capacitance. The operator may control the foot switch, and the control unit may measure the time when the foot switch is stepped on.

In this case, the detected capacitance value is displayed on a monitor (not shown), and the operator steps on the foot switch 5c only when the capacitance value is within a predetermined range while observing this. The control unit 7, the integration of the measured suction time t is adapted to stop the pump 5 when it reaches the set time t _0.

Moreover, in the said embodiment, you may provide the display part which displays the suction time measured by the control part.
In this way, even during the suction, the operator can calculate and grasp the current fat suction amount from the displayed suction time t.

Moreover, in the said embodiment, when the integration | accumulation of the measured suction time reaches | attains set time, a control part may alert | report this.
By doing in this way, the operator and the subject A can know at the same time that the fat suction by the fat suction device 1 is finished.

A liposuction apparatus 1 according to a second embodiment of the present invention will be described below with reference to FIGS.
In the description of the present embodiment, portions having the same configuration as those of the above-described first embodiment are denoted by the same reference numerals and description thereof is omitted.
In the liposuction apparatus 1 according to the present embodiment, as shown in FIG. 4, the pump 5 is disposed in the middle of the suction tube 4, and the solution in the suction tube 4 flows from the cannula 2 toward the container 3. It is a tube pump that applies feed.

In the capacitance sensor 6, one electrode 6a is connected to the insertion portion 2a as in the first embodiment, and the other electrode 6b is grounded, and the relative capacitance of the electrode 6a with respect to the electrode 6b is determined. It comes to detect.
The control unit 7 rotates the pump 5 to send liquid only when the foot switch 5c is stepped on and the detected capacitance value is within a predetermined range.

  A discharge port 3a is provided at the bottom of the storage container 3, and a transparent discharge tube 3b is connected to the discharge port 3a. A discharge valve 3c that can be opened and closed by the control unit 7 is disposed in the middle of the discharge tube 3b. When the discharge valve 3c is opened, the solutions stored in the storage container 3 are sequentially discharged from the lower layer. When the fat and the tumescent liquid are stored simultaneously, the tumescent liquid having a large specific gravity is separated into the lower layer, and the fat having a small specific gravity is separated into the upper layer, and is discharged from the tumescent liquid.

Further, a transmission sensor 8 is disposed in the vicinity of the discharge port 3a outside the discharge tube 3b. The transmission sensor 8 detects light that passes through the discharge tube 3b in the radial direction. When the detected light quantity becomes lower than a predetermined value, the discharge valve 3c is closed by the control unit 7.
In addition, the storage container 3 is disposed on the weighing scale 9, and the total weight of the storage container 3 is measured by the weighing scale 9.

The controller 7 is initially set to measure the suction time t for an initial set time t ₀ that is sufficiently shorter than the suction time required to suck a desired amount of fat.
Control unit 7, the difference in weight that is measured after the gravimeter 9 suction of the suction front and initialization time t _0, and calculates the weight of the fat in the storage container 3. Further, the control unit 7 calculates a suction amount of only fat per unit time from the calculated weight and the initial setting time t _0, and the remaining suction time t ₁ necessary for sucking a desired amount of fat. Is calculated.

A procedure for collecting fat using the liposuction apparatus 1 configured as described above will be described below with reference to FIGS. 5 and 6.
In the present embodiment, the tumescent fluid is sucked from the body of the subject A at the same time as the fat, and the range of the capacitance value determined by the control unit 7 is set based on the measured capacitance value measured in advance. deep.

  First, the weight of the empty container 3 is measured by the weigh scale 9, and when the insertion portion 2a is inserted into the adipose tissue from the tip, the foot switch 5c is stepped on (step S201). If the capacitance value detected by the capacitance sensor 6 is within the set range (step S202), the pump 5 is rotated (step S21) in step S203 shown in FIG. 6 (step S21). Suction is started, and the suction time t is measured by the controller 7 (step S22).

  In step S203, when the foot switch 5c is released during suction (step S23), the rotation of the pump 5 is stopped (step S24), and the measurement of the suction and suction time t is interrupted (step S25). Further, it is determined whether the capacitance value detected by the capacitance sensor 6 is within the set range (step S26). If the determination result is out of the range, the rotation of the pump 5 is stopped (step S27). The measurement of the suction time t is interrupted (step S28).

Then, when the foot switch 5c is stepped on again and the capacitance value falls within the range, the pump 5 starts rotating and the measurement of the suction time t is resumed.
After integration of suction time t measured by the control unit 7 reaches the initialization time t ₀ (step S204), the rotation of the pump 5 is stopped by the control unit 7 (step S205).

Next, the permeation sensor 8 is operated to open the discharge valve 3c, and the tumescent liquid in the container 3 is discharged. When all of the tumescent liquid is discharged and fat starts to be discharged, the amount of light detected by the transmission sensor 8 decreases, and the discharge valve 3c is closed by the control unit 7. When measured by the weight meter 9 the weight of the container 3, the control unit 7, the weight of the aspirated fat initialization time t ₀ is calculated (step S206), also from the calculated weight, the necessary the remaining suction time _{t 1} is calculated (step S207).

Subsequently, the set time t ₁ measured by the control unit 7 is set, the insertion unit 2a is inserted into the fat tissue from the tip, and the foot switch 5c is depressed (step S208), and the detected capacitance value is within the set range. If it is determined that it is within (step S209), the pump 5 rotates in step S210 to start suction (step S21). The control unit 7 is, as in step S203 described above, the suction time t is measured on the basis of the operation and the electrostatic capacitance value of the foot switch 5c, After integration of suction time t has reached the set time t ₁ (step S211 ), The rotation of the pump 5 is stopped (step S212), and the fat suction is finished.

In this way, even when other substances are sucked at the same time as the fat, the amount of only the sucked fat can be accurately adjusted and collected.
In the above embodiment, one electrode 6b is grounded. Instead, as shown in FIG. 7, the electrode 6b is fixed to the surface of the grip portion 2b, and this is fixed by the operator. It may be in contact with the hand.

1 is an overall configuration diagram showing a liposuction apparatus according to a first embodiment of the present invention. It is a flowchart which shows the procedure which extract | collects fat using the liposuction apparatus of FIG. It is a flowchart which shows step S105 of FIG. It is a whole block diagram which shows the liposuction apparatus which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows the procedure which extract | collects fat using the liposuction apparatus of FIG. It is a flowchart which shows step S203 and step S210 of FIG. It is a figure which shows the modification of arrangement | positioning of an electrode.

Explanation of symbols

1 Liposuction device 2 Cannula (suction part)
2a Insertion portion 2b Holding portion 2c Suction port 3 Container 3a Discharge port 3b Discharge tube 3c Discharge valve 4 Suction tube 5 Pump 5a Piping 5b Exhaust valve 5c Foot switch 6 Capacitance sensor (sensor)
6a, 6b Electrode 6c AC power supply 7 Control unit 8 Transmission sensor 9 Weigh scale A Subject

Claims (4)

A cylindrical suction part having a suction port for sucking fat;
A storage container for storing the aspirated fat connected to the suction part;
A pump for reducing the pressure in the suction part and sucking the fat from the suction port into the container;
A sensor that is provided in the vicinity of the suction port and detects contact of the fat in the vicinity of the suction port;
A liposuction apparatus comprising: a control unit that measures a suction time by the pump based on a detection signal from the sensor, and stops suction by the pump when a predetermined suction time is reached.   The liposuction apparatus according to claim 1, wherein the sensor is a capacitance sensor that has two electrodes and detects a capacitance between the electrodes, and one of the electrodes is disposed in the vicinity of the suction port. .   The control unit determines that the suction port is in contact with fat when the capacitance detected by the sensor is within a predetermined range, and measures a suction time by the pump. Liposuction device.   The liposuction apparatus according to claim 2 or 3, wherein the control unit notifies when a predetermined suction time is reached.

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