JP2019071946A - Heat medium supply device and artificial lung unit - Google Patents

Abstract

An artificial lung unit including a heat medium supply device that is small in extracorporeal circulation and easy to prepare for use. A heat medium supply device that supplies a heat medium to a heat exchanger in extracorporeal circulation is provided with a suction port for sucking in external air and a discharge port for discharging the internal air. A housing 10A, an air channel 20 provided in the housing 10A, one end connected to the suction port 11 and the other end connected to the discharge port 12, and a suction port 12 by sucking air from the suction port 11 Measured by the blower 30 to be sent to the heater, the heater 40 for heating the air inside the air flow path 20, the temperature sensor 50 for measuring the temperature of the air discharged from the discharge port 12, and the set temperature and temperature sensor 50. And a controller 70 for controlling the blower 30 and the heater 40 based on the measured temperature, and the discharge port 12 is connected to the heat medium introduction port of the heat exchanger to supply air as a heat medium to the heat exchanger. To do. [Selection] Figure 1

Description

  According to the present invention, a heat medium supply device for supplying a heat medium to a heat exchanger for exchanging heat with blood in extracorporeal circulation, and an artificial lung having the heat medium supply device and the heat exchanger are integrally configured. Relates to an artificial lung unit.

In the extracorporeal circulation used in open heart surgery and assisted circulation therapy, a heat exchanger that exchanges heat with blood is used to adjust and maintain the temperature of the patient. In this heat exchanger, cold water is supplied as a heat medium from a cold water supply device, and heat exchange is performed between blood and cold water through a heat exchanger such as stainless steel or a resin material.
The cold water temperature supply device is large because it includes a water tank for storing water inside. In addition, in use, it is necessary to put water in the internal water tank (see Patent Document 1).

Japanese Patent Application Laid-Open No. 9-26293

The cold and hot water supply apparatus needs to put water in an internal water tank at the time of use, and the preparation operation is complicated when emergency treatment is required. In addition, since water is used, molds, bacteria and the like are easily generated in the water tank, and it takes time and effort to manage hygiene such as drainage and drying for each use and regular water replacement.
In addition, since the device becomes large because of the need to store water as a heat medium, personnel are also required when moving patients during extracorporeal circulation by hospital transfer of patients, etc., and a space is also required for installation. In a room that uses multiple devices, such as a treatment room, treatment may be hampered. In addition, although various medical devices are mounted on doctor cars and doctor copters used for emergency medical care and out-of-hospital transport, smaller devices are required so that more medical devices can be mounted in a limited space. Be

  Therefore, an object of the present invention is to provide a heat medium supply device which is compact and easy to prepare for use, and an artificial lung unit provided with the heat medium supply device.

  The present invention relates to a heat medium supply device for supplying a heat medium to a heat exchanger having a heat medium flow path in which a heat medium for heat exchange with blood flows in extracorporeal circulation, and suction for sucking in external air. An enclosure provided with an outlet and an outlet for exhausting the internal air, and an inside of the enclosure, one end is connected to the inlet, and the other end is connected to the outlet, and an air flow path is provided. A blower for drawing air from the suction port and sending it to the discharge port, a heater for air in the air flow path, and a temperature sensor for measuring the temperature of the air discharged from the discharge port; And a controller configured to control the blower and the heater based on the set temperature and the temperature measured by the temperature sensor, and the outlet is connected to the heat medium inlet of the heat medium flow path. Supply air as a heat medium to the heat exchanger That relates to the heating medium supply device.

  Preferably, the heat medium supply device further includes a filter provided at the suction port for capturing foreign matter from the outside.

  The present invention also includes any of the above-described heat medium supply devices, a gas exchange unit that adds oxygen to blood and removes carbon dioxide from blood, and a heat exchanger that exchanges heat with blood. And an artificial lung unit, wherein the heat medium supply device is integrally attached to the artificial lung.

  Further, the oxygenating unit further includes a connecting member capable of fixing and connecting the discharge port and the heat medium inlet, and the heat medium supply device is integrated with the oxygenator via the connecting member. It is preferred to be attached.

  In addition, it is preferable that the artificial lung unit includes the heat medium supply device and a holder capable of holding the artificial lung, and the heat medium supply device is integrally attached to the artificial lung through the holder.

  According to the present invention, since the air taken in from the outside is used as the heat medium, it is possible to provide the heat medium supply device which is small and easy to prepare.

It is a block diagram showing composition of a heat carrier supply device concerning a 1st embodiment of the present invention. It is a figure which shows the state which attached the heat-medium supply apparatus which concerns on 1st Embodiment to an artificial lung. It is a figure showing an artificial lung unit concerning a 2nd embodiment of the present invention.

  Hereinafter, preferred embodiments of a heat medium supply device and an artificial lung unit of the present invention will be described with reference to the drawings. In the first embodiment, a stationary heat medium supply device for supplying a heat medium to a heat exchanger that constitutes a part of a prosthetic lung will be described with reference to FIGS. 1 and 2. Further, in the second embodiment, with reference to FIG. 3, an oxygenating unit in which the heat medium supply device is integrally fixed to and attached to an oxygenator having a heat exchanger will be described.

First Embodiment
The heat medium supply device 1A according to the first embodiment will be described with reference to FIGS. 1 and 2.
FIG. 1 is a block diagram for explaining the configuration of the heat medium supply device 1A. FIG. 2 is a view showing the stationary-type heat medium supply device 1A attached to the artificial lung 100. As shown in FIG.

  As shown in FIGS. 1 and 2, the heat medium supply device 1A includes a housing 10A, an air flow passage 20, a blower 30, a heater 40, a temperature sensor 50, an operation unit 60, and a control unit 70. And.

  The housing 10A constitutes a main body of the heat medium supply device 1A. The housing 10A is provided with a suction port 11 for suctioning external air and a discharge port 12 for discharging internal air. Preferably, the suction port 11 is provided with a filter 13 for capturing foreign matter from the outside.

  The air flow path 20 is a flow path through which air as a heat medium flows, and is provided inside the housing 10A. One end of the air flow passage 20 is connected to the suction port 11, and the other end of the air flow passage 20 is connected to the discharge port 12.

  The blower 30 is disposed in the vicinity of the suction port 11 in the air flow passage 20, sucks air from the suction port 11, and sends the sucked air to the discharge port 12 side. The flow rate of the air flowing through the air flow passage 20 is controlled by the output of the blower 30.

  The heater 40 heats the air taken into the air flow passage 20 to a predetermined temperature. As the heater 40, well-known heating elements, such as a heating wire, a ceramic heater, and a Peltier element, can be used.

  The temperature sensor 50 measures the temperature of the air discharged from the outlet 12. The temperature sensor 50 is disposed in the vicinity of the outlet 12 in the air flow passage 20.

  The operation unit 60 functions as an input unit when performing various settings such as setting of the temperature of air discharged from the discharge port 12 and setting of the flow rate of air.

The control unit 70 is composed of, for example, a computer device including a central processing unit, a RAM, a ROM, etc., and based on the temperature measured by the temperature sensor 50 and the temperature set by the operation unit 60 The heater 40 is controlled.
The control unit 70 preferably controls the blower 30 and the heater 40 to stop when the temperature of the air measured by the temperature sensor 50 exceeds 42 ° C., which causes protein denaturation. Alternatively, an alarm may be provided in the heat medium supply device 1A to warn of an overheated state, and the control unit 70 may operate the alarm when the discharged air is in the overheated state.

  The heat medium supply device 1A described above operates the blower 30 to take in the air outside the housing 10A from the suction port 11 into the air flow path 20, and the air discharged from the discharge port 12 is operated by the operation unit 60. By controlling the heater 40 by the control unit 70 so as to approach the set temperature, air having a predetermined temperature ranging from the outside air temperature (in the case where the air is not heated) to about 42 ° C. is discharged from the outlet 12 can do.

  Since the heat medium supply device 1A includes only the heater 40 as a temperature control unit, the housing 10A can be configured more compactly than the case where the heat medium supply device 1A further includes a cooler. Therefore, the heat medium supply device 1A is suitably used when the blood is warmed by the heat exchanger. In the case of warming the blood, specifically, when performing cardiopulmonary support as an emergency treatment for unexpected cardiac arrest during surgery, there is a case where cardiopulmonary support is performed in emergency care by a doctor car or a doctor helicopter.

  The heat medium supply device 1A may include a cooler in addition to the heater 40 as a temperature control unit. When a cooler is provided, the air inside the air flow passage 20 can be cooled to a temperature lower than the ambient temperature, so it is suitably used in extracorporeal circulation where hypothermia such as open heart surgery is performed. As a cooler, a cooling element such as a Peltier element can be used.

  The case where the heat medium supply device 1A described above is attached to the artificial lung 100 provided with the heat exchanger 120 will be described with reference to FIG. The heat medium supply device 1A shown in FIG. 2 is a stationary type that is disposed near the artificial lung 100.

First, the configuration of the artificial lung 100 will be briefly described.
The artificial lung 100 shown in FIG. 2 mainly includes a blood flow channel 110, a heat exchanger 120, and a gas exchange unit 130.

  The blood channel 110 is formed inside the housing of the artificial lung 100, and the blood introduced from the blood inlet 111 (see FIG. 2) provided in the housing of the artificial lung 100 flows through the blood channel 110, It is derived from a blood outlet 112 (see FIG. 2) provided in the housing of the oxygenator 100.

  The heat exchanger 120 includes a heat exchanger constituted by a plurality of stainless steel capillaries and a heat medium flow passage (not shown) constituted inside a plurality of stainless steel capillaries, and the blood and the heat exchanger Heat exchange is performed with the heat medium. One end of the heat medium flow channel is connected to the heat medium inlet 123 provided in the housing of the artificial lung 100, the other end is connected to the heat medium outlet 124, and the heat medium flows in the heat medium flow channel. The heat exchanger 120 is disposed on the blood inlet 110 side of the blood flow channel 110.

  The gas exchange unit 130 includes a hollow fiber membrane (not shown) which is disposed on the blood outlet 112 side of the blood flow path 110 and is formed of a large number of porous hollow fibers. By flowing oxygen gas of a predetermined concentration inside the porous hollow fiber constituting the hollow fiber membrane, gas exchange with blood flowing outside the porous hollow fiber is performed.

As shown in FIG. 2, the heat medium supply device 1A of the present embodiment is used by being connected to a prosthetic lung 100 by a tube 140. More specifically, heat medium inlet 123 in artificial lung 100 and outlet 12 in stationary-type heat medium supply device 1A are connected by tube 140, and air as a heat medium is provided in artificial lung 100. The heat can be supplied to the heat exchanger 120.
The blood introduced into the blood inlet 111 is heated in a heat exchanger 120 provided in the oxygenator lung 100 and drawn out from the blood outlet 112. Further, the heated air introduced from the heat medium inlet 123 is discharged to the outside from the heat medium outlet 124 in a state where the heat is taken away by the blood and the temperature is lowered.

  According to the heat medium supply device 1A of the first embodiment described above, the following effects can be obtained.

  (1) The heat medium supply device 1A, the housing 10A provided with the suction port 11 and the discharge port 12, the air flow path 20 provided inside the housing 10A, the blower 30, and the air inside the air flow path 20 The blower 30 and the heater 40 are controlled based on the temperature measured by the heater 40 that heats the air, the temperature sensor 50 that measures the temperature of the air discharged from the outlet 12, and the set temperature and temperature sensor 50 The control unit 70 is configured to be able to supply air as a heat medium to the heat exchanger 120. Accordingly, since the air taken in from the outside is used as the heat medium, the water tank necessary when using water as the heat medium is not necessary, and the housing 10A can be made compact. In addition, since the work of putting water into the water tank is not necessary, the preparation work becomes easy. Further, since the water and the water tank are not required, the generation of mold and bacteria inside the housing 10A is suppressed, and the hygiene management becomes easy. In addition, since the housing 10A is small, the heat medium supply device 1A can be installed even when the installation space is limited in the operating room or the hospital room. Furthermore, even a doctor car or doctor huri can be mounted because of its small size and easy hygiene management.

  (2) The heat medium supply device 1A is configured to include the filter 13. Thereby, even in the case of being used in an environment other than the operating room, it is possible to reduce the contamination of the air flow path 20 of the housing 10A with foreign matter such as dust.

Second Embodiment
Next, an artificial lung unit U according to a second embodiment will be described with reference to FIG.
The oxygenating unit U includes a heat medium supply device 1B and an oxygenator 100, and the heat medium supply device 1B is integrally attached to the oxygenator 100. The heat medium supply device 1B is the same as the heat medium supply device 1A described in the first embodiment except that the configuration of the housing 10B is different and the connection member 80 is further provided. The explanation is omitted. Further, since the configuration of the artificial lung 100 is also the same as that described in the first embodiment, the description will be omitted.

The heat medium supply device 1B further includes a connection member 80 in addition to the same configuration as that of the first embodiment.
The connection member 80 is for fixing and connecting the discharge port 12 and the heat medium inlet 123, and is formed of, for example, a one-touch coupler. The one-touch coupler comprises a socket and a plug fitted into the socket. As an example, when the plug is attached to the discharge port 12 and the socket is attached to the heat medium inlet 123, the plug attached to the discharge port 12 is simply inserted into the socket attached to the heat medium inlet 123. And the heat medium inlet 123 can be fixedly connected. Thus, the housing 10B (the heat medium supply device 1B) can be integrally attached to the artificial lung 100. The heat medium supply device 1B can be attached so as to be hung on the artificial lung 100 using a vacant space near the heat medium inlet 123 of the artificial lung 100, so the heat medium supply device 1B is placed on a floor such as a hospital room There is no need to provide space for
In the second embodiment, as shown in FIG. 3, the discharge port 12 and the heat medium inlet 123 can be connected via the connection member 80, and the heat medium supply device 1B can be connected to the heat medium outlet 124. By including the connection port 14 and connecting the connection port 14 and the heat medium outlet 124 via the connection member 80, the housing 10B (the heat medium supply device 1B) is integrated with the artificial lung 100. Attached to In the connection port 14, an exhaust port 15 for discharging the air led out from the heat medium outlet 124 is formed.

  In addition, the artificial lung unit U is configured to include the heat medium supply device 1B and a holder (not shown) for holding the artificial lung 100, and by attaching and fixing both to the holder, the housing 10B (heat medium supply device 1B) may be integrally attached to the artificial lung 100. As a result, since the heat medium supply device 1B can be attached utilizing the vacant space around the artificial lung 100, there is no need to provide a space for placing the heat medium supply device 1B on a floor such as a hospital room. Further, by fixing and connecting the heat medium supply device 1B to the artificial lung 100 via the connection member 80 and further fixing the both using a holder, the load applied to the connection member 80 can be reduced. The heat medium supply device 1B can be fixed to the artificial lung 100 more reliably.

  According to the artificial lung unit U of the second embodiment described above, the following effects can be obtained.

  (3) The artificial lung unit U includes the heat medium supply device 1B and the artificial lung 100 having the heat exchanger 120, and the heat medium supply device 1B can be integrally attached to the artificial lung 100. did. As a result, the heat medium supply device 1B can be attached utilizing the open space around the artificial lung 100, so there is no need to provide a space for placing the heat medium supply device 1B on the floor of a hospital room, etc. It can be used in operating rooms and sick rooms where the installation space is limited, and it can also be mounted on a doctor car or doctor helicopter.

  (4) The oxygenating unit U includes the connection member 80 which can be connected by fixing the discharge port 12 and the heat medium inlet 123, and the heat medium supply device 1B is connected to the oxygenator via the connection member 80. Should be integrally attached to the As a result, the heat medium supply device 1B can be attached using a vacant space in the vicinity of the heat medium inlet 123 in the artificial lung 100.

  (5) The artificial lung unit U includes a holder capable of holding the heat medium supply device 1B and the artificial lung 100, and the heat medium supply device 1B can be integrally attached to the oxygenator via the holder did. As a result, the heat medium supply device 1B can be attached using the space around the artificial lung 100. Further, since the artificial lung 100 and the heat medium supply device 1B are held by the holder, both can be stably fixed.

As mentioned above, although the preferable embodiment of the heat-medium supply apparatus and artificial-pulmonary unit of this invention was described, this invention is not restrict | limited to embodiment mentioned above, It can change suitably.
For example, in the first and second embodiments, the heat exchanger integrally provided in the oxygenator has been described as an example, but the present invention is not limited to this. As long as the heat exchanger exchanges heat with blood in extracorporeal circulation, it may be configured separately from the artificial lung and attached to the blood circuit.

  In the first and second embodiments, the air after heat exchange is discharged to the outside from the heat medium outlet, but the invention is not limited thereto. The air drawn out from the heat medium outlet may be taken into the air flow path of the heat medium supply device, and the heat medium flow path and the air flow path may form a circulation flow path.

  In the second embodiment, the discharge port 12 and the heat medium inlet 123 are connected via the connection member 80, and the connection port 14 and the heat medium outlet 124 are connected via the connection member 80. Absent. That is, the outlet 12 and the heat medium inlet 123, and the connection port 14 and the heat medium outlet 124 may be directly connected without using the connecting member.

DESCRIPTION OF SYMBOLS 1A, 1B Heat-medium supply apparatus 10A, 10B Housing | casing 11 Inlet 12 Exhaust port 13 Filter 20 Air flow path 30 Blower 40 Heater 50 Temperature sensor 70 Control part 100 Artificial lung 111 Blood inlet 112 Blood outlet 120 Heat exchanger 121 heat exchanger 122 heat medium channel 123 heat medium inlet 124 heat medium outlet 130 gas exchange unit U artificial lung unit

Claims (5)

A heat medium supply device for supplying a heat medium to a heat exchanger provided with a heat medium flow path through which a heat medium for performing heat exchange with blood flows in extracorporeal circulation, comprising:
A housing provided with a suction port for suctioning external air and a discharge port for discharging internal air;
The air flow path is provided inside the housing, one end is connected to the suction port, and the other end is connected to the discharge port;
A blower for drawing air from the suction port and sending it to the discharge port;
A heater for heating air inside the air flow path;
A temperature sensor that measures the temperature of air discharged from the discharge port;
A controller configured to control the fan and the heater based on the set temperature and the temperature measured by the temperature sensor;
The heat medium supply device, wherein the discharge port is connected to a heat medium inlet of the heat medium flow channel, and supplies air as a heat medium to the heat exchanger.   The heat medium supply device according to claim 1, further comprising: a filter provided at the suction port for capturing foreign matter from the outside. The heat medium supply device according to claim 1 or 2;
A gas exchange unit for adding oxygen to blood and removing carbon dioxide from the blood, and an artificial lung having a heat exchanger for heat exchange with the blood,
An artificial lung unit in which the heat medium supply device is integrally attached to the artificial lung. It further comprises a connecting member capable of fixing and connecting the discharge port and the heat medium inlet port,
The oxygenator unit according to claim 3, wherein the heat medium supply device is integrally attached to the oxygenator through the connection member. The heat medium supply device and a holder capable of holding the artificial lung,
The oxygenator unit according to claim 3 or 4, wherein the heat medium supply device is integrally attached to the oxygenator through the holder.

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