JP2007130236A - Warming apparatus of chemical - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a warming apparatus for warming a chemical in a chemical tube to a desired temperature by simple constitution. <P>SOLUTION: The chemical tube 20 is covered with a warm keeping cover 10, and warm air is put through the warm keeping cover to warm the chemical in the chemical tube. To put it in the concrete, the warm keeping cover has a cylindrical cover body 11 having an inner diameter larger than the outer diameter of the chemical tube and is provided with a warm air entrance 10-1 at its prescribed place. The chemical tube is put through the inside of the cylindrical cover body. Then, the chemical in the chemical tube is warmed to the desired temperature by putting the warm air whose temperature is controlled through the cylindrical cover body. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a heating apparatus for heating an injection tube for supplying an infusion solution, blood, a contrast medium and the like for infusion, blood transfusion, diagnosis and the like. In this specification, liquids that are injected into the human body for medical purposes, such as drip liquid, blood, and contrast medium, are collectively referred to as chemical liquids.

  Gentle medical care is being screamed, and it is becoming possible to infuse a drip solution after warming it to a temperature close to body temperature. In general, this is intended for recovery of physical strength, nutritional supplementation, etc. by performing intravenous drip on a sick person with weak physical strength.If the temperature of the drip solution is lower than the body temperature, the drip solution entering the body is removed from the body temperature. This is because energy is consumed in increasing the energy level, leading to exhaustion of physical strength.

  For example, Patent Document 1 discloses a circulating fluid warming device that warms a chemical solution to a temperature approximating body temperature and supplies it to the body. This apparatus is provided with a partition in which a continuous liquid passage (meandering passage) is formed in a film sheet, and a heating plate in which both sides of a heating bag formed by connecting an outlet tube and an inlet tube are sandwiched by a heating plate. The chemical solution flowing through the passage is heated.

  However, such a heating device has the following problems.

  1. Since the chemical solution directly flows through the apparatus, it is difficult to share it with different types of chemical solutions.

  2. Since an electric heater is incorporated as a heating source and the electric system is integrated with the apparatus, it is not preferable for safety.

  3. This type of device is preferably installed in a location closer to the medicine bag than in the vicinity of the injection needle due to its construction. In the case of infusion, the heated liquid reaches the injection needle due to the slow supply rate. The temperature tends to drop before

Registered Utility Model No. 3056439

  The subject of this invention is providing the heating apparatus which can eliminate the above problems with the simplest possible structure.

  According to the present invention, there is provided a heating apparatus characterized in that a tube for passing a chemical solution is covered with a heat insulating cover, and the chemical solution in the tube is heated by passing warm air through the heat insulating cover. .

  In the warming device according to the present invention, the heat retaining cover has a cylindrical body having an inner diameter larger than the outer diameter of the tube, and a hot air inlet is provided at a predetermined location, and the tube is placed in the cylindrical body. The chemical solution in the tube is heated to a desired temperature by passing warm air whose temperature is controlled through the cylindrical body.

  In the warming device according to the present invention, the heat retaining cover has the hot air inlet at a position close to an intermediate portion of the cylindrical body, and the hot air introduced from the hot air inlet is the cylindrical body. It is preferable that the flow is diverted toward both ends of the tube and discharged from the end of the cylindrical body.

  Further, in the heating device according to the present invention, both ends of the cylindrical body are closed in a state where the tubes are passed through, and the warm air is discharged to locations near the both ends of the cylindrical body. One or more holes may be provided.

  Further, in the heating device according to the present invention, the heat insulation cover is connected to a hollow connector having the hot air inlet and having connection portions on both sides of the hot air inlet, and one end side to the connection portion. The tube is arranged so as to pass through the two cover bodies and the connector, and the hot air introduced from the hot air inlet is The two cover bodies may be divided and discharged from the other end side of each cover body.

  Further, in the heating device according to the present invention, the tube is connected to the inner wall of the connector in order to prevent the tube passed through the connector from blocking the passage of the hot air inlet. There may be provided a fixing ring for holding in a separated state.

  In the heating device according to the present invention, it is preferable that a guide fin for separating the tube from the inner wall is provided on the inner wall of the cylindrical body.

  In the warming device according to the present invention, a hot air generator is disposed at a location away from the heat insulation cover, and the hot air generated by the hot air generator is connected to the hot air inlet. It is preferable to be introduced into the heat insulating cover.

  In the heating apparatus according to the present invention, it is further preferable that the cylindrical body extends over substantially the entire length of the tube.

  According to the warming device of the present invention, since the chemical solution is heated indirectly through the tube, it can be shared with different types of chemical solutions. Moreover, since a heating source can be arrange | positioned in another place, an electric system can be made into a different body from a heating apparatus, and it is preferable on safety.

  By using the heating device according to the present invention, in the case of infusion, the infusion pack or bottle stocked at room temperature is not heated, and even if it is used as it is, the temperature close to the body temperature is maintained near the drug solution outlet (injection needle). be able to.

  Further, in the case of contrast medium injection in Angio, the viscosity of the contrast medium can be lowered by keeping the pressure-resistant tube warm, and the pressure in the tube at the start-up of the injection can be reduced. This prevents the tube from rupturing at the time of injecting the contrast agent, and has the effect that a thinner contrast catheter can be used.

  The chemical solution heating apparatus according to the present invention heats a chemical solution tube for supplying a chemical solution from the outside with warm air, and covers the chemical solution tube with a cylindrical heat insulation cover, and the temperature is controlled in the heat insulation cover. It is configured to warm by flowing warm air.

  Hereinafter, the heating principle will be described with reference to the drawings. FIG. 1 shows the relationship between a chemical solution tube and a heat insulating cover used for heating the tube. The heat insulating cover 10 has a cylindrical shape with both ends open, and the inner diameter of the heat insulating cover 10 is larger than the outer diameter of the chemical liquid tube 20 so that the chemical liquid tube 20 can be passed therethrough. A warm air inlet 10-1 is provided at the center of the heat insulating cover 10 shown in cross section.

  Hot air is injected from the hot air inlet 10-1, and the injected hot air is divided into two in the heat insulating cover 10 and is discharged from the open portions at both ends. In this process, the chemical solution in the chemical solution tube 20 is heated. In order to increase the heating effect, the temperature difference between the inlet and outlet of the hot air must be reduced. When the air resistance in the heat insulating cover 10 increases, the flow velocity decreases and heat escapes out of the heat insulating cover 10 and the temperature difference increases. In order to reduce this temperature difference, the air resistance may be reduced and the flow rate increased.

  FIG. 2 is an enlarged cross-sectional view showing the flow direction of the warm air in the heat insulating cover 10. The reason why the warm air inlet 10-1 is provided in the central portion (intermediate portion) of the heat insulating cover 10 is to reduce the air resistance. That is, the warm air supplied from the warm air inlet 10-1 is divided into left and right as indicated by arrows in the heat retaining cover 10, and the divided warm air is discharged from the open end of the heat retaining cover 10. By reducing the air resistance in this manner, the flow rate and flow rate of the warm air in the heat insulating cover 10 are increased, thereby reducing the temperature decrease at the warm air outlet.

  FIG. 3A to FIG. 3C are cross-sectional views showing the state of the chemical liquid tube 20 in the heat insulating cover 10. Even if the inner surface of the heat insulating cover 10 is cylindrical, and the chemical solution tube 20 is inserted in a state of waviness there, as can be understood from the cross-sectional views of FIGS. 3B and 3C, It can be seen that there is a certain warm air circulation space between the heat insulating cover 10 and the chemical solution tube 20 in any state. A part of the chemical solution tube 20 comes into contact with the inner surface of the heat insulating cover 20, but it does not cause a large temperature difference between the inlet and the outlet if an appropriate hot air flow rate is secured.

  4A and 4B are cross-sectional views showing an improved example in which guide fins 10-2 are provided in the heat insulating cover 10. FIG. The chemical solution tube 20 is guided by attaching guide fins 10-2 at intervals (here, 90 degrees) in the length direction and the circumferential direction in the heat insulation cover 10. The hot air temperature is prevented from lowering so as not to contact the inner surface.

  FIG. 5 shows an example in which warm air is circulated in only one direction. That is, in this example, one end side of the chemical liquid tube 20 is provided by providing the insertion port of the chemical liquid tube 20 and the warm air inlet 10-1 ′ on one end side and using the heat insulating cover 10 ′ having the opposite end opened. Hot air is introduced from the air and discharged from the opposite side. In this example, the air resistance is about twice that in the example shown in FIG. 1, and the total flow rate of hot air is about 25%. However, by increasing the inner diameter of the heat insulating cover 10 ′ or increasing the pressure of the warm air, it can be approximated to the example of FIG. 1.

  With reference to FIGS. 6-16, preferable embodiment of the heating apparatus by this invention is described.

  FIG. 6 shows a form that can be provided at a low cost with the simplest structure. In this embodiment, as described with reference to FIG. 1, the heat insulating cover 10 in which the hot air inlet (tube connecting portion) 10-1 is integrally formed at the intermediate portion of the cylindrical body is used. A chemical liquid tube connector 21 is attached to both ends of the chemical liquid tube 20. One chemical liquid tube connector 21 has a needle for insertion into a medical bag, and the other chemical liquid tube connector 21 has an injection needle for a human body. The Since the chemical liquid tube connector 21 is larger than the inner diameter of the heat insulating cover 10, the chemical liquid tube connector 21 is attached to both ends of the chemical liquid tube 20 after passing the chemical liquid tube 20 slightly longer than this through the heat insulating cover 10. That is, this heating apparatus is provided to the user in the state shown in FIG. 6 in which the chemical solution tube 20 is incorporated in the heat insulating cover 10. The heat insulation cover 10 is made of a transparent material, for example, a resin material, so that the presence or absence of bubbles in the chemical liquid tube 20 can be confirmed.

  Hot air is introduced into the hot air inlet 10-1 from a hot air tube (not shown) connected to a hot air generator described later.

  FIG. 7 shows a modification of the embodiment of FIG. In the form of FIG. 6, the warm air introduced from the warm air inlet 10-1 is discharged from the open ends on both sides of the heat retaining cover 10. On the other hand, in this example, both ends of the heat insulating cover 10 are closed in a state where the chemical solution tube 20 is passed, and instead, one or more holes (here, a total of 8 holes in the length direction and the circumferential direction are spaced apart). 10a), and warm air is discharged from the hole 10a. The reason for this is as follows.

  (1) For example, when an injection needle is attached to the drug tube connector 21 on the right side in the figure, it is possible to prevent hot air from hitting the affected area where the injection needle is inserted.

  (2) By adjusting the diameter of the hole 10a, the pressure of the warm air in the heat insulating cover 10 can be designed to a desired value. Thereby, it can be used in the state swelled moderately so that the heat insulation cover 10 may not be crushed.

  FIG. 8 is an enlarged cross-sectional view inside the broken circle on the left side of FIG. 7, and the end portion of the heat insulating cover 10 is filled with a filling 22 for closing the space between the chemical solution tube 20. Since the chemical liquid tube connector 21 is larger than the inner diameter of the heat insulating cover 10, the chemical liquid tube connector 21 is attached to both ends of the chemical liquid tube 20 after passing the chemical liquid tube 20 slightly longer than the heat insulating cover 10 and the end of the heat insulating cover 10. The part is closed with the filling 22. That is, the user is provided in the state shown in FIG. 7 in which the chemical solution tube 20 is incorporated in the heat insulating cover 10.

  Still another embodiment will be described with reference to FIGS. In this embodiment, the heat insulating cover 10 has a detachable and detachable structure.

  9 to 11, the heat insulating cover 10 includes two cylindrical cover bodies 11 and a cover attachment connector (hereinafter abbreviated as a connector) 12 for connecting them together. The connector 12 is a hollow body, and has a hot air inlet (tube connecting portion) 10-1 for connecting a hot air tube (not shown) for supplying hot air to an intermediate portion thereof. A cover connecting portion 12-1 for connecting the cover body 11 is provided. In particular, the tip of the cover connecting portion 12-1 is tapered to facilitate fitting of the cover body 11.

  Referring also to FIG. 12, the connector 12 is molded from a polymer material such as Teflon (registered trademark), and the inner diameter is made slightly larger than the maximum diameter of the chemical liquid tube connector 21 on the chemical liquid tube 20 side. The chemical liquid tube 20 with 21 is easily inserted.

  Hot air is introduced into the hot air inlet 10-1 from a hot air tube (not shown) connected to a hot air generator described later.

  As shown in FIG. 9, the chemical solution tube 20 is inserted into the heat insulating cover 10. In order to prevent the chemical solution tube 20 from coming into contact with the inner wall on the hot air inlet 10-1 side in the connector 12 to block the passage of the hot air inlet 10-1, the following measures are taken.

  Referring to FIGS. 13A and 13B, fixing rings 13 are provided at two locations on the inner wall of connector 12 with hot air inlet 10-1 in between.

  As shown in FIGS. 14 (a) and 14 (b), the fixing ring 13 has a spring property by cutting out a part of the ring-shaped body, and a portion on the opposite side of the notch is formed in an arc shape. It is formed to be recessed. The fixing ring 13 is attached so that the chemical tube 20 is passed through the connector 12, the notch is directed toward the hot air inlet 10-1, and the ring-shaped portion is along the inner wall of the connector 12. If it does so, the chemical | medical solution tube 20 will enter into the circular-arc shaped hollow of the fixing ring 13, As a result, since the chemical | medical solution tube 20 is hold | maintained by the hollow of the fixing ring 13, it can prevent blocking the path | route of the warm air inlet 10-1.

  The heat insulation cover 10 according to this embodiment and the chemical liquid tube 20 are assembled as follows.

  As shown in FIG. 12, the chemical liquid tube 20 with the chemical liquid tube connector 21 is passed through the connector 12. Next, the fixing ring 13 is attached to the connector 12 to fix the chemical solution tube 20 to the connector 12. Subsequently, the cover body 11 is attached to the cover connection portions 12-1 on both sides of the connector 12. A needle for inserting into the drug bag is connected to the drug tube connector 21 on one end side of the drug tube 20, and an injection needle is connected to the drug solution tube connector 21 on the other end side. A hot air tube is connected to the hot air inlet 10-1. When the warm air generated by the warm air generator is introduced through the warm air tube, the introduced warm air is divided into two in the connector 12 and is discharged from the open ends of the two cover bodies 11.

  In addition, the cover body 11 can confirm the presence or absence of the bubble in the chemical | medical solution tube 20 by making with a transparent material, for example, a resin material. Further, although the heating device according to the present embodiment is also provided to the user in the state shown in FIG. 9, the chemical liquid tube connector 21 may be attached after the chemical liquid tube 21 is passed through the heat insulating cover 10.

  15 is a cross-sectional view taken along line AA in FIG.

  Next, an example of the hot air generating device will be described with reference to FIG. 16, but any hot air supply source that supplies hot air to the heat insulating cover 10 through the hot air tube may be used.

  FIG. 16 shows an example of a warm air generator that warms the chemical solution in the chemical solution tube 20 set in the removable heat retaining cover 10 with warm air. This hot air generator 100 is manufactured considering safety first.

  In FIG. 16, power is supplied via an isolation transformer 101 and is separated from commercial power. A noise filter 102 is attached in front of the isolation transformer 101 so that noise is not input and output is not generated. The power switch is also used as a breaker and is immediately turned off when an abnormality occurs. The isolated power supply is supplied to the electric air pump 103 and the control power supply unit 104.

  The electric air pump 103 converts the rotational motion of the motor into a linear motion and drives a teflon (registered trademark) bellows pump to obtain compressed air. The bellows pump can obtain an appropriate flow rate, pressure, and low noise by low-speed movement, and an air filter 105 is provided at the air intake port so as to simply filter the taken-in air.

  The compressed air from the electric air pump 103 is introduced into the heat exchanger 106.

  The heat exchanger 106 radiates the heat generated from the electric heater 106-1 with heat radiating fins and warms the introduced compressed air to convert it into warm air. The hot air temperature is detected by the thermistor 106-2 and sent to the temperature control unit 107. The temperature control unit 107 compares the detected hot air temperature with the set temperature, and performs a control operation for maintaining the hot air temperature at the set temperature by turning on and off the electric heater 106-1 according to the comparison result. Execute. When any abnormality occurs and the hot air temperature rises above the set temperature, this is detected by the overheat prevention element 106-3. When the overheat prevention element 106-3 detects a temperature rise, it immediately turns off the electric heater 106-1.

  The warm air whose temperature is controlled in this way is supplied to the heat insulating cover 10 through the warm air tube 110.

  The temperature control unit 107 can arbitrarily set the temperature of the hot air (for example, 35 to 37 ° C. close to body temperature), and the temperature detection signal detected by the thermistor 106-2 turns the electric heater 106-1 on and off to an optimum temperature. Is supposed to maintain. When the overheat prevention element 106-3 operates, the electric heater 106-1 is locked off. In addition, it is designed so that the heater power supply is automatically shut off when some abnormality occurs and it becomes in an uncontrollable state.

  As mentioned above, although preferable embodiment of this invention has been described, this invention is not limited to the said embodiment. For example, the cover fin 11 shown in FIG. 11 may be provided with guide fins as described in FIG. The heat insulating cover 10 (cover body 11) preferably has flexibility, and is provided over the entire length of the drug solution tube 20 from the drug bag to the injection needle in order to maintain the temperature of the drug solution to be injected at a desired temperature. Is desirable. In this case, the connector 12 is located in the middle part of the drug solution tube 20 from the drug bag to the injection needle. However, the material of the heat insulating cover 10 is not limited to a resin material, a flexible material, and a transparent material, and the length can be freely set. Further, when the pack containing the chemical solution is heated and then set as a medicine bag, the warming device can be used as a heat retaining device.

  According to the heating device of the present invention, the following effects can be obtained.

  1. Since it is a structure which heats a chemical | medical solution indirectly via a chemical | medical solution tube, it can be shared also with a different kind of chemical | medical solution.

  2. A warm air generator as a heating source is installed separately from the warming device, and the warming device itself does not have an electrical system, which is preferable for safety. That is, the member used for the heating device is a polymer insulator such as Teflon (registered trademark), which is excellent in electrical insulation and is completely separated from the electrical system because only warm air is used.

  3. The warming cover and cover body of the heating device can be set to any length and can extend over the entire length of the chemical tube, so in the case of infusion, the heated liquid even if the supply speed is slow The temperature does not decrease until the needle reaches the injection needle.

  The heating device according to the present invention can be used in various forms such as infusion, infusion pump, an angiography injector extension tube, etc., such as heating of a drug solution in the tube.

FIG. 1 is a view for explaining the heating principle of the heating device according to the present invention. FIG. 2 is an enlarged cross-sectional view of a portion in a circle indicated by a broken line in FIG. 3A to 3C are cross-sectional views for explaining the state of the chemical liquid tube in the heat insulating cover shown in FIG. FIG. 4 is a cross-sectional view showing an improved example of the heat insulating cover shown in FIG. FIG. 5 is a partially broken view showing another example of the heat insulating cover. FIG. 6 is a view showing a preferred embodiment of the heating device according to the present invention. FIG. 7 is a view showing a modification of the embodiment of FIG. FIG. 8 is an enlarged view of a part of FIG. 7 and further a part thereof. FIG. 9 is a diagram showing another embodiment of the heating device according to the present invention. FIG. 10 is a view showing a cover mounting connector constituting the heating device shown in FIG. FIG. 11 is a view showing a cover body constituting the heating device shown in FIG. FIG. 12 is a view showing a state in which the chemical solution tube is passed through the cover mounting connector shown in FIG. FIGS. 13A and 13B are views for explaining a fixing ring attached to the connector shown in FIG. 14 (a) and 14 (b) are diagrams for explaining the fixing ring shown in FIG. 13 (b). 15 is a cross-sectional view taken along line AA in FIG. FIG. 16 is a block diagram showing an example of a hot air generator for supplying hot air to the heating device according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Thermal insulation cover 10a Hole 10-1 Hot air inlet 10-2 Guide fin 11 Cover body 12 Cover attachment connector 13 Fixing ring 20 Chemical solution tube

Claims (9)

  A heating apparatus characterized by covering a tube through which a chemical solution is passed with a heat insulating cover and heating the chemical solution in the tube by passing warm air through the heat insulating cover.   The heat insulation cover has a cylindrical body having an inner diameter larger than the outer diameter of the tube, and a hot air inlet is provided at a predetermined position thereof, and the tube is passed through the cylindrical body. The warming device according to claim 1, wherein the chemical solution in the tube is heated to a desired temperature by passing warm air controlled in temperature.   The heat insulating cover has the hot air inlet at a position near the middle portion of the cylindrical body, and the hot air introduced from the hot air inlet is diverted toward both end sides of the cylindrical body, The heating device according to claim 2, wherein the heating device is discharged from an end portion of the cylindrical body.   Both ends of the cylindrical body are closed with the tube passed through, and one or more holes for discharging the warm air are provided at locations close to the both ends of the cylindrical body, respectively. The heating apparatus according to claim 3, wherein   The heat insulation cover has the hot air inlet and a hollow connector having connecting portions on both sides of the hot air inlet, and two cylindrical cover bodies connected at one end to the connecting portion; The tube is arranged so as to pass through the two cover bodies and the connector, and the hot air introduced from the hot air inlet is divided into the two cover bodies. The heating device according to claim 2, wherein the heating device is discharged from the other end side of each cover body.   The inner wall of the connector is fixed to hold the tube away from the hot air inlet passage in order to prevent the tube passed through the connector from blocking the hot air inlet passage. The heating apparatus according to claim 5, wherein a ring is provided.   The heating device according to any one of claims 1 to 6, wherein a guide fin for separating the tube from the inner wall is provided on the inner wall of the cylindrical body.   A hot air generator is disposed at a location away from the heat insulating cover, and the hot air generated by the hot air generator is introduced into the heat insulating cover via a hot air tube connectable to the hot air inlet. The heating apparatus according to any one of claims 2 to 7, wherein: The heating apparatus according to any one of claims 2 to 8, wherein the cylindrical body extends over substantially the entire length of the tube.

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