JP5996843B2 - Infusion pump - Google Patents

Description

  The present invention relates to an infusion pump for delivering a drug or the like to a patient.

The infusion pump is used, for example, in an intensive care unit (ICU) or the like, and is used to perform a liquid feeding treatment for a patient for a long time with high accuracy. The infusion pump has a main body and an opening / closing door. A predetermined drug bag (infusion bag) is arranged on the infusion pump, and an infusion tube lowered from the drug bag is sandwiched between the main body and the door, and the infusion tube is accommodated in the main body. The door is held by closing the door.
In the main body of the infusion pump, the outer peripheral surface of the infusion tube set at a fixed position is sandwiched between a plurality of fingers in the main body and the inner surface of the door. This infusion pump is a peristaltic infusion in which a plurality of fingers of a liquid feeding drive unit are individually driven, and a plurality of fingers sequentially press the outer peripheral surface of the infusion tube along the length direction to feed a medicine. It is a pump (refer patent document 1).

In the infusion pump described in Patent Document 1, the infusion tube is held vertically through the body of the infusion pump from top to bottom.
On the other hand, an infusion pump that holds an infusion tube in a horizontal direction in the body of the infusion pump has been proposed. In this way, the infusion pump has a structure in which the infusion tube is held in the horizontal direction in the main body of the infusion pump so that the infusion tube passes vertically through the main body of the infusion pump from top to bottom. This is because the infusion tube does not get in the way even if a plurality of infusion pumps are stacked and held in a stacked state in the vertical position. For example, when the upstream side of the infusion tube is arranged on the right side of the body of the infusion pump and the downstream side of the infusion tube is arranged on the left side of the body of the infusion pump. If the upstream side of the infusion tube is arranged on the right side of the main body of the infusion pump and the downstream side of the infusion tube is arranged on the left side of the main body of the infusion pump, the infusion pump is driven, so that the drug is Liquid can be fed along a predetermined liquid feeding direction from the upstream side toward the downstream side, and liquid can be fed correctly to the patient.

JP 2010-200775 A

  By the way, in the infusion pump that holds the infusion tube through the horizontal direction, in the infusion pump that holds the infusion tube through the horizontal direction, the infusion tube is set in the horizontal direction in the main body of the infusion pump. There is a possibility that the user) sets the upstream side and the downstream side of the infusion tube in the wrong direction along the horizontal direction with respect to the main body of the infusion pump.

That is, a medical worker mistakenly arranges the infusion tube in the opposite direction with respect to the main body, arranges the upstream side of the infusion tube on the left side portion of the main body of the infusion pump, and the downstream side of the infusion tube is the main body of the infusion pump If the medicine is disposed on the right side, the medicine is fed in the direction opposite to the correct direction, so that the medicine cannot be delivered correctly to the patient.
For this reason, when a medical worker attaches an infusion tube to an infusion pump, it is desired that the medical worker can easily attach the infusion tube in the correct direction while visually confirming the infusion tube.

  Therefore, according to the present invention, when a medical worker attaches an infusion tube, the medical worker can easily attach the infusion tube in the correct direction while visually confirming, and the medicine is correctly delivered by the infusion tube. It is an object of the present invention to provide an infusion pump that can perform such an operation. It is another object of the present invention to provide an infusion pump that can be used in a state where a plurality of infusion pumps are stacked in the vertical direction without using a rack or an infusion stand, or without using a rack or an infusion stand.

The infusion pump of the present invention includes a display unit disposed on one surface exposed to the outside of the upper half of the main body, and a lower part of the main body, disposed on the same surface as the one surface. In a state where the infusion tube to be infused to the side is attached in the lateral direction, and the infusion tube is attached in the lateral direction, the medicine is delivered in a predetermined liquid delivery direction along the lateral direction. A liquid feeding drive unit for opening, opening and closing about a rotation axis along the lateral direction, and opening and closing cover covering the tube mounting unit and the liquid feeding driving unit by closing, and mounting on the tube mounting unit An upstream infusion tube guide portion that holds the upstream side of the infusion tube, and the upstream infusion tube guide portion includes an inclined guide portion that guides the upstream side of the infusion tube obliquely. Have Infusion tube guide portion of the flow side, the well is exposed in a state where the cover is closed, the display unit as will be mounted horizontally at least in the tube attachment section, the display including information of the mounting state of the infusion tube It is characterized by having a configuration to perform .
According to the above configuration, when the medical staff attaches the infusion tube, the medical staff can easily attach the infusion tube in the correct direction while visually confirming, and the drug is correctly delivered by the infusion tube. be able to. That is, the medical worker can visually confirm that the upstream side of the infusion tube is set to the inclined guide portion side, and can hold the upstream side of the infusion tube without being bent suddenly. . Moreover, since this inclination guide part is exposed without being covered with the opening / closing cover, a medical worker may directly observe the inclination guide part and arrange the upstream side of the infusion tube on the inclination guide part side. I can confirm that.

Preferably, the inclined guide portion has an angle α of 25 to 35 degrees from the horizontal direction, a height H of 13 to 18 mm, and a horizontal length L of 13 to 18 mm .

Preferably, a side surface portion of the opening / closing cover on the upstream side of the infusion tube is formed to be inclined obliquely.
According to the above configuration, the upstream infusion tube guide portion can always be exposed even when the open / close cover is closed, so it is visually confirmed that the upstream side of the infusion tube is attached to the upstream infusion tube guide portion. it can.

Preferably, an upper portion of the main body is provided with a display unit for displaying information and an operation panel unit having operation buttons.
According to the above configuration, the medical worker can close the open / close cover by attaching the infusion tube to the tube attachment portion while confirming information on the display portion on the upper portion of the main body. Then, the medical worker can operate the operation buttons on the operation panel unit while confirming the information on the display unit on the upper part of the main body.

  In the present invention, when a medical worker attaches an infusion tube, the medical worker can easily attach the infusion tube in the correct direction while visually confirming, and the medicine can be delivered correctly through the infusion tube. A possible infusion pump can be provided.

The perspective view which shows preferable embodiment of the infusion pump of this invention. The perspective view which looked at the infusion pump shown in FIG. 1 from the W direction. The perspective view which shows the tube mounting part for opening the opening / closing cover of the infusion pump shown to FIG. 1 and FIG. 2, and mounting | wearing with an infusion tube. The front view which looked at the infusion pump shown in FIG. 3 from the V direction. The figure which shows the structural example of the double hook structure part of an opening-and-closing cover. The front view which shows the vicinity of a 1st infusion tube guide part and a bubble sensor. The figure which shows the preferable structural example of the bubble sensor shown in FIG. The figure which shows the formation position of the 2nd guide surface of the guide groove part in a bubble sensor. The figure which shows the example of propagation of the ultrasonic wave in embodiment of this invention and a comparative example. The disassembled perspective view which shows the structural example of an upstream obstruction | occlusion sensor and a downstream obstruction | occlusion sensor. The figure which shows the support structure of the 1st press member and 2nd press member which respectively oppose an upstream block sensor and a downstream block sensor. The figure which shows the electrical structural example of an infusion pump. The figure which shows another embodiment of this invention. The figure which shows the example which mounted the several infusion pump shown in FIG. 1 and FIG. 2 and another syringe pump in the setting stand.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
The embodiments described below are preferred specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments. FIG. 1 is a perspective view showing a preferred embodiment of the infusion pump of the present invention. FIG. 2 is a perspective view of the infusion pump shown in FIG. 1 as viewed from the W direction.

  The infusion pump 1 shown in FIGS. 1 and 2 is used, for example, in an intensive care unit (ICU, CCU, NICU) or the like, and is used for nutrition, such as anticancer agents, anesthetics, chemotherapeutic agents, blood transfusions, etc. This is an infusion device used for injecting a drug such as a drug in a range of 1 to 9999 mL / h and 1 to 9999 mL for a relatively long time with high accuracy. This infusion pump 1 is used, for example, for selecting a drug to be used from a drug library and feeding the selected drug. This drug library is drug information which is a drug administration setting group including drug names registered in advance in the drug library database (DB). By using this drug library, a medical worker does not have to perform complicated administration settings each time, and can select a drug and set a drug.

As shown in FIG. 2, the infusion pump 1 is configured such that the infusion rate (mL / h) set and inputted to the patient P from the medicine bag 170 filled with the medicine 171 through the infusion tube 200 and the indwelling needle 172. The liquid can be delivered accurately according to the injection volume (mL). The drug is also called an infusion. An infusion tube is also called an infusion line.
The infusion pump 1 has a main body cover 2 and a handle 2T, and the handle 2T can be extended in the N direction which is the horizontal direction or can be stored in the T direction which is the horizontal direction. The main body cover 2 is also called a main body, and is integrally formed of a molded resin material having chemical resistance, so that even if a drug or the like is applied, it can be prevented from entering the infusion pump 1. have. As described above, the main body cover 2 has the splash-proof treatment structure because the medicine 171 in the medicine bag 170 disposed above is spilled or disinfecting liquid used in the vicinity is scattered and attached. Because there is.

First, the elements disposed on the main body cover 2 of the infusion pump 1 will be described.
As shown in FIGS. 1 and 2, a display unit 3 and an operation panel unit 4 are arranged on the upper portion 2 </ b> A of the main body cover 2. The display unit 3 is an image display device, and uses, for example, a color liquid crystal display device. This display unit 3 can display not only information notation in Japanese but also information in a plurality of foreign languages as required. The display unit 3 is disposed on the upper left side of the upper portion 2 </ b> A of the main body cover 2 and above the opening / closing cover 5.
The display unit 3 is covered with a polyester film, for example, and is glossy. On the other hand, the surface of the operation panel unit 4 is subjected to, for example, matte processing. The upper portion 2 </ b> A of the main body cover 2 is an upper half portion of the main body cover 2. The lower part 2 </ b> B of the main body cover 2 is a lower half part of the main body cover 2. A mark of the pump can be displayed by applying or painting a seal material of a color different from the surface color of the main body cover 2, for example, a yellow or red seal material, on or around the main body cover 2. . By providing a mark for this pump, when a plurality of infusion pumps 1 are used in a stacked manner, or when this infusion pump 1 and other types of pumps such as a syringe pump are used in a stacked manner, There is an advantage that the boundary is visually clarified.

In FIG. 2, the display unit 3 includes, as an example, a display column 3B for a scheduled amount (mL) of drug administration, a display column 3C for an integrated amount (mL) of drug administration, a display column 3D for a charge history, and a flow rate (mL). Although the display column 3E and the like are displayed, the display contents of the display unit 3 shown in FIG. 1 are omitted for the sake of simplicity of the drawing. The display unit 3 can also display a warning message.
The operation panel unit 4 is disposed on the right side of the display unit 3 in the upper portion 2A of the main body cover 2, and the operation panel unit 4 includes, for example, an LED in the illustrated example as an operation button. In order to indicate the operating state of the infusion pump 1 by emitting and displaying through a light diffusing agent, the pilot lamp 4A projecting in a dome shape about 2 mm from the main body cover 2, a set flow rate (mL / h) A fast-forward switch button 4B, a start switch button 4C, a stop switch button 4D, a menu selection button 4E, etc. for injecting the chemical at a higher injection speed are arranged. The power switch button is arranged at a position different from the operation panel unit 4.

As shown in FIG. 1, an opening / closing cover 5 as a lid member rotates around a rotation shaft 5A at the lower portion 2B of the body cover 2 and can be opened / closed in the R direction so that the inner surface of the body cover 2 faces the upper surface. Is provided. The opening / closing cover 5 is a lid formed long along the X direction. An infusion tube 200 made of a flexible thermoplastic resin such as soft vinyl chloride is set in the tube mounting portion 50 of the lower portion 2B on the inner surface side of the opening / closing cover 5, and the opening / closing cover 5 is closed. Thus, the infusion tube 200 can be mounted horizontally along the X direction.
As shown in FIG. 2, an infusion tube setting direction for clearly displaying the T direction, which is the correct liquid feeding direction, when the infusion tube 200 is set on the surface of the opening / closing cover 5, if necessary. A display unit 150 is provided. The infusion tube setting direction display unit 150 includes a drug bag display unit 151 that displays the drug bag side, a patient side display unit 152 that displays the patient side, and a liquid supply direction display unit 153 that clearly indicates the liquid supply direction of the drug. .

The drug bag display unit 151, the patient side display unit 152, and the liquid feeding direction display unit 153 are printed on, for example, a seal material. The drug bag display unit 151, the patient side display unit 152, and the liquid feeding direction The display unit 153 is attached to the surface of the opening / closing cover 5.
As shown in FIG. 2, the drug bag display unit 151 is arranged to visually confirm that the drug bag 170 side of the infusion tube 200 comes to the right side of the opening / closing cover 5, and the patient side display unit 152 is It arrange | positions in order to confirm visually that the patient P side of the infusion tube 200 is located in the left side part toward the opening / closing cover 5. FIG. And the liquid feeding direction display part 153 is arrange | positioned in order to clearly show the liquid feeding direction (T direction) of the chemical | medical agent 171 by the infusion tube 200 set inside the opening-and-closing cover 5, and a chemical | medical agent bag display part It is an arrow along the T direction from 151 to the patient side display unit 152. The infusion tube setting direction indicator 150 may be attached to the front surface side of the opening / closing cover 5 as a retrofit.
Note that the X direction, the Y direction, and the Z direction in FIGS. 1 and 2 are orthogonal to each other, and the Z direction is the vertical direction. The X direction is parallel to the T direction and is the left-right direction of the infusion pump 1, and the Y direction is the front-rear direction of the infusion pump 1.

FIG. 3 is a perspective view showing a tube mounting portion 50 for opening the opening / closing cover 5 of the infusion pump 1 shown in FIGS. 1 and 2 and mounting the infusion tube 200. FIG. 4 is a front view of the infusion pump 1 shown in FIG. 3 as viewed from the V direction.
As shown in FIGS. 3 and 4, the tube mounting part 50 is provided on the main body 1 </ b> B side of the infusion pump 1, and the tube mounting part 50 extends in the X direction at the lower part of the display unit 3 and the operation panel unit 4. It is provided along. As shown in FIG. 2, the tube mounting portion 50 can cover the open / close cover 5 with the open / close cover 5 when the open / close cover 5 is closed in the CR direction around the rotation shaft 5A.
In this way, the medical worker confirms the information on the mounting state of the infusion tube 200 displayed in color on the display unit 3 of the upper portion 2A of the main body cover 2, while the infusion tube 200 is attached to the tube mounting unit 50. The opening / closing cover 5 can be closed by mounting. Then, the medical staff can operate the operation buttons on the operation panel unit 4 while checking the information on the display unit 3 of the upper portion 2A of the main body cover 2.
As shown in FIGS. 3 and 4, the tube mounting portion 50 includes a bubble sensor 51, an upstream blockage sensor 52, a downstream blockage sensor 53, a first infusion tube guide portion 54 at the right side position, and a second infusion solution at the left side position. A tube guide portion 55 and an opening / closing cover 5 are provided. A tube clamp portion 270 is disposed on the tube mounting portion 50.

A structural example of the opening / closing cover 5 shown in FIGS. 3 and 4 will be described.
As shown in FIGS. 3 and 4, the opening / closing cover 5 is a plate-like member made of a thin molded resin member in order to reduce the weight of the infusion pump 1. In order to reduce the weight, the opening / closing cover 5 is opened / closed. The cover 5 has a structure in which an electrical component such as an electrical switch is not mounted. Thereby, the weight of the opening / closing cover 5 can be reduced, and the structure can be simplified by omitting the electric wiring from the tube mounting portion 50 side to the opening / closing cover 5 side.
As shown in FIGS. 3 and 4, the opening / closing cover 5 covers the tube mounting portion 50 so that the inner surface of the opening / closing cover 5 faces the upper surface along the CS direction and the CR direction around the rotation shaft 5A. In order to be able to do so, it is supported with respect to the lower part 2V of the main body cover 2 by two hinge parts 2H and 2H. The two hinge portions 2H and 2H are respectively arranged corresponding to the first hook member 5D and the second hook member 5E as a plurality of presser portions for constituting the engagement tightening portion.

As shown in FIGS. 3 and 4, an opening / closing operation lever 260 is provided in the upper right part on the surface side of the opening / closing cover 5. On the inner surface side of the opening / closing cover 5, an infusion tube pressing member 5C and engaging members 5D, 5E are provided. The infusion tube pressing member 5C is disposed as a long rectangular and planar protrusion along the X direction and is in a position facing the peristaltic liquid feeding drive unit 60. The infusion tube holding member 5 </ b> C is a flat surface in the X direction along the liquid feeding drive unit 60, and presses a part of the infusion tube 200 with the liquid feeding drive unit 60 by closing the opening / closing cover 5 in the CR direction. It is supposed to be pinched.
The medical worker can set the infusion tube 200 on the lower half of the body of the infusion pump 1 along the horizontal direction while confirming the display content displayed on the display unit 3, and the infusion tube 200 is connected to the tube mounting portion. After being set to 50, the opening / closing cover 5 can cover the infusion tube 200.

As shown in FIGS. 3 and 4, the two hook members 5D and 5E as the engagement tightening portions for tightly holding the closed state of the opening and closing cover 5 are fixed to the fixing portions 1D and 1E on the main body portion 1B side. As shown in FIG. 2, the opening / closing cover 5 can firmly hold the closed state of the tube mounting portion 50 of the main body 1B. The two hook members 5D and 5E and the fixing portions 1D and 1E on the main body 1B side constitute a double hook structure portion 300 as an engagement tightening portion of the opening / closing cover 5. The hook member 5D is a first hook member, and the hook member 5E is a second hook member.
In addition, the engagement tightening portion is not limited to the hook structure as in the present embodiment, but a main body such as a fixing male screw on the cover side, a bolt tightening structure with a plurality of female screws on the main body side, or a clamping structure capable of adjusting the tightening force. Various structures can be adopted as long as they can firmly hold the closed state against the force applied to the open / close cover during operation from the side.

FIG. 5 shows a structural example of the double hook structure 300 of the opening / closing cover 5.
As shown in FIG. 5A, on the inner surface side 5I of the opening / closing cover 5, a hook member 5D is provided protruding from the base 301, and a hook member 5E is provided protruding from the base 302. The base portion 301 is disposed at a position near the right end portion side of the opening / closing cover 5, and the base portion 302 is disposed on the left end portion side of the opening / closing cover 5. As shown in FIG. 4, in the tube mounting part 50, the liquid feeding drive part 60, the downstream blockage sensor 53, and the tube clamp part 270 are arranged corresponding to the position between the hook member 5D and the hook member 5E. Yes. However, in the tube mounting part 50, the bubble sensor 51 and the upstream blockage sensor 52 are arranged corresponding to positions on the right side of the hook member 5D.

As shown in FIGS. 5 (A) to 5 (C), the opening / closing cover 5 is closed in the CR direction, and the hook member 5D and the hook member 5E are respectively machined relative to the fixing portions 1D and 1E on the main body 1B side. It is designed to be applied simultaneously. The hook member 5 </ b> D is a substantially C-shaped member, and is attached to the base portion 301 of the opening / closing cover 5 by a rotation shaft 303. The hook member 5 </ b> E is a substantially C-shaped member and is attached to the base portion 302 of the opening / closing cover 5 by a rotation shaft 304.
The hook members 5D and 5E are connected by, for example, a metal connecting member 305 and two pins 306 and 307. One end of the opening / closing operation lever 260 is connected to the base 301 using the pin 206. For this reason, when the medical staff rotates the opening / closing operation lever 260 in the RR direction, the hook members 5D and 5E are simultaneously rotated in the RT direction by being interlocked by the connecting member 305.

As shown in FIG. 5A, the hook members 5D and 5E are pressed when a medical worker pushes the opening / closing cover 5 in the CR direction and closes the tube mounting portion 50 by the opening / closing cover 5 as shown in FIG. 5B. If the opening / closing operation lever 260 is rotated in the RR direction as shown in FIG. 5B, the hook member 5D and the hook member 5E are fixed to the main body 1B side as shown in FIG. 5C. 1D and 1E are mechanically applied simultaneously.
On the other hand, when a medical worker tries to open the tube mounting portion 50 from the state shown in FIG. 5C, as shown in FIG. 5B, FIG. 5C to FIG. 5B. As shown in FIG. 5, when the opening / closing operation lever 260 is rotated in the RS direction, the hook member 5D and the hook member 5E are rotated in the RU direction and simultaneously detached from the fixing portions 1D and 1E on the main body 1B side. For this reason, when the medical worker opens the opening / closing cover 5, the tube mounting part 50 can be exposed.

  The tube clamp part 270 shown in FIG. 4 can clamp and close the intermediate part of the infusion tube 200 by opening the opening / closing cover 5. In addition, when the open / close cover 5 is closed, the infusion tube 200 is not closed. The tube clamp part 270 is arranged in the vicinity of the left fixed part 1E and in the vicinity of the position of the tube mounting part 50 corresponding to the position of the left hook member 5E.

  As shown in FIG. 4, the first infusion tube guide portion 54 is provided on the right side portion of the main body portion 1B, and the second infusion tube guide portion 55 is provided on the left side portion of the main body portion 1B. Yes. The first infusion tube guide portion 54 can be held by fitting the upstream side 200A of the infusion tube 200, and the second infusion tube guide portion 55 can be held by fitting the downstream side 200B of the infusion tube 200, and the infusion tube 200 can be held. It is held in the horizontal direction along the X direction.

  In this way, the infusion tube 200 held in the horizontal direction is disposed along the bubble sensor 51, the upstream block sensor 52, the liquid feed drive unit 60, the downstream block sensor 53, and the tube clamp unit 270. It is like that.

FIG. 6 is a front view showing the vicinity of the first infusion tube guide portion 54 and the bubble sensor 51.
As shown in FIGS. 6 and 4, the first infusion tube guide portion 54 has two protrusions 54B and 54C and an inclined guide portion 54T. The two protrusions 54B and 54C are formed on the main body 1B in order to hold the upstream side 200A of the infusion tube 200 detachably when the infusion tube 200 is set in the horizontal direction.
The inclined guide portion 54T is a downward step portion formed from the two protrusions 54B and 54C obliquely in the upper right direction (inclined so as to gradually rise toward the upstream side) in FIG. It is a part which guides the side 200A diagonally.
The inclined guide portion 54T has an angle α from the horizontal direction of preferably 25 to 35 degrees, particularly preferably 30 degrees, and a horizontal length L of 13 to 18 mm, particularly preferably 15 mm and a height. H is 13 to 18 mm, particularly preferably 15 mm, the width W is 6 to 8 mm (preferably 7 mm), the bottom is R 3.5 mm, and the depth is 5.4 mm.
If the angle α from the horizontal direction exceeds 35 degrees, it becomes easy to bend at the two two protrusions 54B and 54C, and the height of the infusion pump 1 becomes large, and the work of mounting the infusion tube 200 is somewhat difficult. It becomes difficult. When the angle α from the horizontal direction is smaller than 25 degrees, the length L in the horizontal direction becomes longer, and the dimension in the width direction of the infusion pump 1 becomes larger.
When the width W is larger than 8 mm, the infusion tube 200 is not sandwiched between the inclined guide portions 54T. When the width W is larger than 6 mm, the infusion tube 200 is crushed by the inclined guide portions 54T.
By providing such an inclined guide portion 54T, a medical worker simply sets the upstream side 200A of the infusion tube 200 so as to press against the stepped portion that is the inclined guide portion 54T, and the upstream side 200A of the infusion tube 200 It can be visually confirmed that is set correctly. Thereby, the upstream side 200A of the infusion tube 200 can be held without being suddenly bent. In addition, since the inclined guide portion 54T is exposed without being covered with the opening / closing cover 5, the medical worker directly looks at the inclined guide portion 54T, so that the upstream side 200A of the infusion tube 200 is inclined to the inclined guide portion 54T. It can be confirmed that it should be arranged on the side.

As shown in FIG. 4, the second infusion tube guide portion 55 is a groove portion formed in the side surface portion 1 </ b> S of the main body portion 1 </ b> B in order to detachably hold a part of the downstream side 200 </ b> B of the infusion tube 200. is there.
The first infusion tube guide portion 54 and the second infusion tube guide portion 55 shown in FIG. 4 are tube-mounted so that the infusion tube 200 is not pinched between the opening / closing cover 5 and the tube mounting portion 50 and crushed. It is provided in order to ensure that it can be mounted in the part 50.
As shown in FIGS. 1 and 2, the right side surface portion 5 </ b> K of the opening / closing cover 5 is formed to be inclined toward the upper left direction. Thereby, even when the open / close cover 5 is closed, the open / close cover 5 is prevented from covering the two protrusions 54B and 54C of the first infusion tube guide portion 54 and the inclined guide portion 54T. Thus, even in the closed state of the cover 5, the medical personnel, the two projections 54B, and 54C, to expose the inclined guide portion 54T, the mounted state of the upstream side 200 A of the infusion tube 200, It can be confirmed visually.

  The bubble sensor 51 shown in FIG. 4 is a sensor that detects bubbles (air) generated in the infusion tube 200. For example, the bubble sensor 51 is inserted into the infusion tube 200 from the outside of the infusion tube 200 made of soft vinyl chloride or the like. It is an ultrasonic sensor that monitors bubbles contained in a flowing medicine. Since the ultrasonic wave generated from the transmitter of the ultrasonic sensor is applied to the drug flowing in the infusion tube 200, the transmittance of the ultrasonic drug and the transmittance of the bubbles of the ultrasonic wave are different. Detects an output difference based on the difference in transmittance and monitors the presence or absence of bubbles.

FIG. 7 shows a preferred structure example of the bubble sensor 51 shown in FIG. FIG. 7A shows a state immediately before the opening / closing cover 5 covers the tube mounting portion 50, and FIG. 7B shows a state where the opening / closing cover 5 covers the tube mounting portion 50. FIG. FIG. 3 is a perspective view showing the vicinity of a bubble sensor 51.
As shown in FIGS. 7A and 4, a protrusion 320 is provided at a position corresponding to the bubble sensor 51 on the inner surface side of the opening / closing cover 5. As shown in FIGS. 7A and 7C, the bubble sensor 51 includes a sensor body 330 made of plastic, an ultrasonic oscillation element 331, and an ultrasonic reception element 332.
The sensor main body 330 is fixed by being fitted into a setting hole 329 formed in the surface 50S of the tube mounting portion 50. The sensor main body 330 has a central part 341, an upper holding part 342, and a lower holding part 343. The central portion 341 is located at the center position of the upper holding portion 342 and the lower holding portion 343, and the upper holding portion 342 and the lower holding portion 343 are fixed in the hole 329. An ultrasonic oscillation element 331 is fixed in a gap 361 between the central portion 341 and the upper holding portion 342. An ultrasonic receiving element 332 is fixed in a gap 362 between the central portion 341 and the lower holding portion 343. The ultrasonic oscillator 331 and the ultrasonic receiver 332 are set so as to be parallel to the Y direction.

  As shown in FIG. 7A, one end 331A of the ultrasonic oscillation element 331 is disposed at a distance D1 from the surface 50S of the tube mounting portion 50. One end portion 332A of the ultrasonic wave receiving element 332 is disposed at a distance D3 from the surface 50S of the tube mounting portion 50. The interval D1 is, for example, 3.9 mm, and the interval D1> the interval D3. The other end portion 332B of the ultrasonic receiving element 332 is disposed at a position of a distance D4 that is obtained by adding the distance D1 and the distance D2. The other end 331B of the ultrasonic oscillation element 331 is disposed at a position to which the interval D4 and the interval D5 are added. The distance D2 is, for example, 3.2 mm.

  As described above, the position of the ultrasonic oscillation element 331 in the Y direction is shifted from the position of the ultrasonic reception element 332 in the Y direction by the distance D5, that is, in the Y1 direction by the amount of ultrasonic refraction. It is arranged at a shifted position. The position of the ultrasonic oscillating element 331 in the Y direction is arranged at a position shifted in the Y1 direction by a distance D5 compared to the position of the ultrasonic receiving element 332 in the Y direction. This is because the second guide surface 352 is inclined by an angle θ with respect to the Y direction although it is parallel to the surface formed by the Y direction. Thereby, even if the ultrasonic wave HH from the ultrasonic oscillator 331 is refracted and propagated on the second guide surface 352, the ultrasonic wave HH can be reliably received by the ultrasonic receiver 332.

As shown in FIG. 7A, the sensor body 330 has a guide groove 350 that guides and holds the infusion tube 200. The guide groove portion 350 has a first guide surface 351, a second guide surface 352, and a bottom portion 353. The first guide surface 351 is a plane formed by the Y direction and the X direction, and is formed in parallel with the ultrasonic oscillation element 331. On the other hand, the second guide surface 352 is an inclined surface formed to be inclined at an angle θ with respect to the Z direction. That is, the second guide surface 352 is not formed parallel to the ultrasonic oscillation element 331 and the ultrasonic reception element 332. An example of the angle θ is 65 to 75 degrees, preferably 70 degrees. If the angle θ is smaller than 65 degrees, the thickness DF of the sensor main body 330 in the Z direction becomes large, which is not preferable. On the other hand, when the angle is greater than 75 degrees, the opening becomes narrow and it becomes difficult to guide the infusion tube 200 to the sensor body 330.
The second guide surface 352 is a flat surface formed along the X direction. Thus, when the second guide surface 352 is inclined with respect to the Y direction and the Z direction, when the various infusion tubes 200 having different diameters are held in the guide groove portion 350, the guide groove portion 350 is infused. The tube 200 can be held corresponding to different diameters. An example of the diameter range of the infusion tube 200 is, for example, a range of 3.3 mm to 4.5 mm.

FIG. 8 shows the position where the second guide surface 352 of the guide groove 350 is formed. FIG. 8A shows a preferable example of forming the second guide surface 352 of the guide groove 350 in the embodiment of the present invention, and FIG. 8B shows a shape of the guide groove that is not preferable as a comparative example. Yes.
FIG. 8A shows that, in a preferred example of forming the second guide surface 352 of the guide groove portion 350 in the embodiment of the present invention, the second guide surface 352 that is an inclined surface is below the first guide surface 351, that is, It is located on the proximal side with respect to the rotation axis 5A. When the protrusion 320 of the opening / closing cover 5 rotates in the CR direction around the rotation shaft 5A and enters the guide groove 350, the infusion tube 200 is pushed by the protrusion 320, and the first of the protrusion 320 and the guide groove 350 It can hold | maintain between the guide surface 351 and the 2nd guide surface 352 so that it may not be crushed.

On the other hand, in FIG. 8B, in the unfavorable shape of the guide groove 1000 of the comparative example, the inclined surface 1002 is positioned above the flat surface 1001, that is, distal to the rotation axis 5A. . In this comparative example, when the projection 320 of the opening / closing cover 5 rotates in the CR direction and enters the guide groove portion 1000, the infusion tube 200 is pushed by the projection 320, and the gap between the projection 320 and the inclined surface 1002 inclined. There is a risk of crushing.
Thus, in order to prevent the infusion tube 200 from being pinched between the protrusion 320 and the inclined surface 1002 to be crushed, in the embodiment of the present invention, as shown in FIG. A second guide surface 352 that is a guide surface closer to the hinge portion 2H (rotation shaft 5A of the opening / closing cover 5) side of the cover 5 is an inclined surface, and a far guide surface is located on the hinge portion 2H side. The first guide surface 351 is a flat surface along the Y direction.

Returning to FIG. 7A, the bottom portion 353 of the guide groove 350 is formed at the intersection of the first guide surface 351 and the second guide surface 352, and has a convex portion 371 and a concave portion 372. The position of the concave portion 372 is further formed on the Y1 direction side as compared with the position of the convex portion 371, and the position of the concave portion 372 is further on the Y1 direction side than the position of the other end portion 331B of the ultrasonic oscillation element 331. Is set to
FIG. 9A shows an example of ultrasonic wave propagation in the case where the concave portion 372 of the bottom portion 353 in the embodiment of the present invention shown in FIG. 7A is provided. As shown in FIG. 9A, the ultrasonic wave HH from the ultrasonic oscillation element 331 can be prevented from entering due to the presence of the recess 372. Thereby, since the ultrasonic wave HH from the ultrasonic oscillation element 331 does not propagate around the presence of the recess 372 and noise is not received by the ultrasonic reception element 332, the ultrasonic wave HH in the infusion tube 200 is not received. It can prevent the detection accuracy of bubbles from deteriorating.

  On the other hand, FIG. 9B shows an example of ultrasonic wave propagation when the concave portion 372 is not provided in the bottom portion 353 as a comparative example. In FIG. 9B, the ultrasonic wave HH from the ultrasonic oscillation element 331 wraps around and is received by the ultrasonic reception element 332 because there is no recess 372. As described above, when the ultrasonic wave HH wraps around and propagates and is received by the ultrasonic wave receiving element 332, the detection accuracy of bubbles in the infusion tube 200 may be lowered.

  Referring to FIG. 4, the upstream blockage sensor 52 shown in FIG. 4 is a sensor that detects whether the infusion tube 200 is blocked on the upstream side 200 </ b> A of the infusion tube 200, and the downstream blockage sensor 53 is the infusion tube 200. It is a sensor which detects whether the infusion tube 200 is obstruct | occluded in the downstream 200B. The upstream blockage sensor 52 and the downstream blockage sensor 53 have the same configuration. The case where the infusion tube 200 is blocked is, for example, a case where the viscosity of the medicine to be delivered is high or the concentration of the medicine is high.

FIG. 10 is an exploded perspective view showing a structural example of the upstream block sensor 52 (downstream block sensor 53). A hole 400 is provided in the surface 50 </ b> S of the tube mounting portion 50. A plastic frame member 401 is fitted into the hole 400, and the frame member 401 has a rectangular opening 402. The plastic slider 403 is inserted into the accommodation hole 404 in the hole 400 and has a base 405, a tip 406, and a spring 407. The front end 406 of the slider 403 is fitted in the opening 402. One end of the spring 407 is attached to the base 405, and the other end of the spring 407 is attached to the protrusion 409 in the accommodation hole 404. A Hall element 410 is disposed on the inner surface of the accommodation hole 404. Two magnets 411 and 412 are arranged on the base 405.
Thus, the frame member 401 is mounted in the hole 400, and the base 405 is inserted into the opening 402 and the accommodation hole 404 while holding the spring 407, which is a coil spring, for example. The blockage sensor 53 can be easily mounted on the surface 50S of the tube mounting portion 50, and the assembly workability of the upstream blockage sensor 52 and the downstream blockage sensor 53 can be improved.

On the other hand, as shown in FIG. 4, pressing members 452 and 453 are provided on the inner surface side of the opening / closing cover 5 at positions corresponding to the upstream closing sensor 52 and the downstream closing sensor 53, respectively. The support structure 440 of the pressing members 452 and 453 has the same structure and is shown in FIG. FIG. 12 shows a support structure 440 for the pressing members 452 and 453. The pressing member 452 is a first pressing member, and the pressing member 453 is a second pressing member.
As shown in FIGS. 11A and 11E, the support structure 440 of the pressing members 452 and 453 includes a spring 441 as a biasing member, a support member 442, and two retaining portions 443. ing. The pressing member 452 (453) has a cylindrical portion 444, and the two retaining portions 443 are formed at positions on the left and right sides of the cylindrical portion 444. The cylindrical portion 444 accommodates from one end portion of the spring 441 to the middle portion, and the other end portion of the spring 441 is fitted and held in the protrusion 445 of the support member 442. Thereby, the assembly operator can push the pressing member 452 (453) against the force of the spring 441 in the M direction as shown in FIG.

As shown in FIG. 11A, the support member 442 has a rectangular hole 442C in the surface plate 442A, and a pressing member 452 (453) is formed by passing the tube portion 444 through the hole 442C. Is fitted into the support member 442.
As shown in FIG. 11B, the assembling worker keeps pressing the pressing member 452 (453) against the force of the spring 441 in the M direction, and as shown in FIG. Rotate in the direction. Then, as shown in FIG. 11D, the assembly operator fits each retaining portion 443 into the engaging portion 460 on the opening / closing cover 5 side. Thus, the pressing member 452 (453) can be pressed in the M direction against the force of the spring 441 while maintaining the state shown in FIG. The member 452 (453) can be returned to the M1 direction by the force of the spring 441 in the support member 442.

  As shown in FIG. 11, by adopting the support structure 440 for the pressing members 452 and 453 described above, the pressing members 452 and 453 are inserted into the supporting member 442 and are prevented from coming off after being rotated by 90 degrees. Since the pressing members 452 and 453 do not pop out by the portion 443 and can be easily attached via the spring 441, the assembly workability of the pressing members 452 and 453 can be improved. Since the spring 441 which is a coil spring can be disposed so as to be incorporated in the cylindrical portion 444 of the pressing members 452 and 453, when the pressing members 452 and 453 including the spring 441 are assembled to the support member 442, Good workability. As shown in FIG. 12D, the support member 442 of the support structure 440 of the pressing members 452 and 453 has a simple structure and can suppress the height HG, so that it can be opened and closed as shown in FIG. It can be easily arranged on the inner surface side of the cover 5.

  When the medical worker sets the infusion tube 200 in the tube mounting part 50 as shown in FIG. 3 and then closes the opening / closing cover 5 as shown in FIG. 2, the first pressing member 452 and the second pressing member 452 on the opening / closing cover 5 side are closed. The pressing member 453 can press a part of the infusion tube 200 against the upstream blockage sensor 52 and the downstream blockage sensor 53 side, respectively. For this reason, due to manufacturing tolerances, the upstream blockage sensor 52 and the downstream side are closed when the open / close cover 5 is closed even if the infusion tube 200 of a different manufacturer has a slight variation or is attached to the infusion pump 1. The occlusion sensor 53 can accurately detect the occlusion state of the infusion tube 200.

When the open / close cover 5 shown in FIG. 11 (F) is closed as shown in FIG. 2, the infusion tube 200 is moved between the pressing member 452 (453) and the tip 406 of the slider 403 as shown in FIG. , 441 are held by each urging force. If the infusion tube 200 is closed and the diameter of the infusion tube 200 changes, the tip 406 follows the change in the diameter of the infusion tube 200 and moves in the Y direction. For this reason, when the magnets 411 and 412 move relative to the Hall element 410, the Hall element 410 can detect a change in magnetic flux and send a signal of a change in magnetic flux to the control unit 100.
As shown in FIG. 10, the central axis direction of the spring 441 and the central axis direction of the spring 407 coincide with each other, and the springs 441 and 407 sandwich the infusion tube 200 between the pressing member 452 (453) and the distal end portion 406. Thus, it is possible to apply pressure to the infusion tube 200 along the diameter direction of the infusion tube 200. For this reason, the obstruction | occlusion sensors 52 and 53 can detect the obstruction | occlusion state of the infusion tube 200 accurately.

Due to manufacturing tolerances, the first pressing member 452 on the opening / closing cover 5 side is closed when the opening / closing cover 5 is closed, even if the outer diameter varies slightly or the infusion tube 200 of a different manufacturer is attached to the infusion pump 1. And the second pressing member 453 can press a part of the infusion tube 200 against the upstream side occlusion sensor 52 and the downstream side occlusion sensor 53, respectively, so that the upstream side occlusion sensor 52 and the downstream side occlusion sensor 53 are in contact with the infusion tube 200. Can be detected.
Even if a certain tube internal pressure is applied to the infusion tube 200, the amount of swelling of the infusion tube 200 changes as the temperature around the infusion tube 200 changes. A general vinyl chloride tube or silicon tube used as the infusion tube 200 tends to soften when the temperature rises, and conversely, hardens when the temperature falls. For this reason, even if a constant tube internal pressure is applied, the infusion tube 200 is likely to swell when the temperature is high, and conversely, the infusion tube 200 whose temperature is low is unlikely to swell.
For this reason, preferably, a temperature sensor (not shown) such as a thermistor is provided to detect the use environment temperature of the infusion pump 1, and the use environment temperature detected by the temperature sensor is, for example, every 20 ° C. between 20 to 40 ° C. By changing the threshold value for detecting the blocking pressure (the threshold value for the amount of movement of the slider 403 that forms the blocking sensors 52 and 53), the blocking state of the infusion tube 200 can be accurately detected. For example, assuming that the moving amount of the slider 403 at 20 to 25 ° C. at a constant pressure is 1, the moving amount of the slider 403 at 15 to 20 ° C. is 0.99, and the slider 403 at 10 to 15 ° C. When the moving amount is 0.98, when the moving amount is 5 to 10 ° C., the moving amount of the slider 403 is 0.97, when the moving amount is 25 to 30 ° C., the moving amount of the slider 403 is 1.01, and when the moving amount is 30 to 35 ° C. The threshold value is changed as 1.02 of the movement amount. By doing so, even if the infusion tube 200 becomes easy to swell or becomes difficult to swell, the occlusion pressure in the infusion tube 200 can be detected at a substantially constant level.

  As described above, when the open / close cover 5 is closed as shown in FIG. 2, force is applied from the tube mounting portion 50 side of the infusion pump 1 to the inner surface side of the closed open / close cover 5. .

  Although force is applied to the inner surface side of the opening / closing cover 5 from such a plurality of portions of the main body 1B, the hook member 5D and the hook member 5E are fixed on the main body 1B side as shown in FIG. The parts 1D and 1E are mechanically applied simultaneously. Thus, the pressure applied to the opening / closing cover 5 can be received by the hook member 5D and the hook member 5E, and the opening / closing cover 5 is supported at these two locations, so that the opening / closing cover 5 may be warped or deformed. No.

FIG. 12 shows an electrical configuration example of the infusion pump 1.
As shown in FIG. 12, the liquid feeding drive unit 60, which will be described later, includes a drive motor 61, a cam structure 62 having a plurality of cams driven to rotate by the drive motor 61, and the cam structure. A finger structure 63 having a plurality of fingers moved by 62 cams is provided.
The cam structure 62 has a plurality of cams, for example, six cams 62A to 62F, and the finger structure 63 has six fingers 63A to 63F corresponding to the six cams 62A to 62F. doing. The six cams 62 </ b> A to 62 </ b> F are arranged with a phase difference from each other, and the cam structure 62 is connected to the output shaft 61 </ b> A of the drive motor 61.

  When the output shaft of the drive motor 61 rotates according to the command of the control unit 100 shown in FIG. 12, the six fingers 63A to 63F sequentially advance and retreat by a predetermined stroke in the Y direction, so that the infusion tube 200 extends along the T direction. Since it is pressed against the infusion tube pressing member 5C of the open / close cover 5, the medicine in the infusion tube 200 can be sent in the T direction. That is, when the plurality of fingers 63A to 63F are individually driven, the plurality of fingers 63A to 63F sequentially press the outer peripheral surface of the infusion tube 200 along the T direction to feed the medicine in the infusion tube 200. . By controlling the peristaltic motion of the plurality of fingers 63A to 63F, the fingers 63A to 63F are sequentially moved forward and backward, and as if the waves are moving, the infusion point of the infusion tube 200 is moved in the T direction. The drug is transferred by squeezing the tube 200.

  As shown in FIG. 12, the infusion pump 1 has a control unit (computer) 100 that controls the overall operation. The control unit 100 is a one-chip microcomputer, for example, and includes a ROM (read only memory) 101, a RAM (random access memory) 102, a nonvolatile memory 103, and a clock 104. The clock 104 can correct the current time by a predetermined operation, and can acquire the current time, measure the elapsed time of a predetermined liquid feeding operation, measure the reference time of liquid feeding speed control, and the like.

  The control unit 100 shown in FIG. 12 is connected to a power switch button 4S and a switch 111. The switch 111 supplies power to the control unit 100 from either the power converter unit 112 or the rechargeable battery 113 by switching between the power converter unit 112 and the rechargeable battery 113 such as a lithium ion battery. The power converter unit 112 is connected to a commercial AC power source 115 via an outlet 114.

The output shaft 61A of the drive motor 61 of the liquid delivery drive unit 60 shown in FIG. 12 is rotated by a command from the control unit 100, and the perfusion movement of the fingers 63A to 63F is performed to squeeze the infusion tube 200 and supply the drug. Transfer in T direction.
FIG. 2 shows the infusion pump 1, the drug bag 170, and the infusion tube 200 set along the T direction, which is the correct liquid feeding direction with respect to the infusion pump 1. As shown in FIG. 2, one end of the infusion tube 200 is connected to the drug bag 170 via the clamp 179, and the other end of the infusion tube 200 is connected to the indwelling needle 172 on the patient P side. The drug 171 in the drug bag 170 is administered to the patient P by being fed in the T direction which is the correct direction through the infusion tube 200 and the indwelling needle 172 by driving the liquid feeding drive unit 60.

  Returning to FIG. 12, the display unit driver 130 drives the display unit 3 in accordance with an instruction from the control unit 100 to display the information content and the warning message illustrated in FIG. 2. The speaker 131 can notify various alarm contents by voice according to a command from the control unit 100. The buzzer 132 can notify various alarms by sound according to commands from the control unit 100. The speaker 131 is an example of a warning unit that issues a warning by voice to a medical worker when the infusion tube 200 is set in the N direction (reverse direction), which is the wrong direction. The buzzer 132 is an example of a warning unit that issues a warning by sound to a medical worker when the infusion tube 200 is set in the N direction (reverse direction), which is the wrong direction.

In FIG. 12, the bubble detection signal S 1 from the bubble sensor 51, the upstream block signal S 2 indicating that the upstream side of the infusion tube 200 from the upstream block sensor 52 is blocked, and the downstream of the infusion tube 200 from the downstream block sensor 53. A downstream block signal S3 indicating that the side is blocked is supplied to the control unit 100. The upstream blockage signal S2 from the upstream blockage sensor 52 is a signal indicating the magnitude of the internal pressure on the upstream side 200A of the infusion tube 200. The downstream block signal S3 from the downstream block sensor 53 is a signal indicating the magnitude of the internal pressure on the downstream side 200B of the infusion tube 200.
The upstream blockage sensor 52 and the downstream blockage sensor 53 are alarms that can detect a state in which the internal pressure of the infusion circuit exceeds the set pressure in the infusion pump 1 and the medicine cannot be delivered, and are output to the control unit 100. . The reason why the internal pressure of the infusion circuit exceeds the set pressure in the infusion pump 1 is that when the infusion needle for infusion or the infusion tube 200 is clogged, the infusion tube 200 is crushed or broken, a highly viscous drug This is the case when using.

In FIG. 12, the control unit 100 can communicate bidirectionally with a computer 141 such as a desktop computer through the communication port 140. This computer 141 is connected to a drug database (DB) 160, and drug information MF stored in the drug database 160 is acquired by the control unit 100 via the computer 141, and the non-volatile state of the control unit 100 is acquired. It can be stored in the memory 103. The control unit 100 can display the drug information MF and the like on the display unit 3 shown in FIG. 2, for example, based on the stored drug information MF.
In FIG. 13, a fast forward switch button 4B, a start switch button 4C, a stop switch button 4D, and a menu selection button 4E are electrically connected to the control unit 100.

Next, the operation | movement at the time of using the infusion pump 1 mentioned above is demonstrated.
As shown in FIG. 3, before the medical worker opens the opening / closing cover 5 and sets the infusion tube 200 in the tube mounting portion 50, the infusion tube setting direction display portion arranged on the opening / closing cover 5 shown in FIG. 2. 150, the setting direction of the infusion tube 200 is visually confirmed. That is, as shown in FIG. 2, in order to allow a medical worker to correctly set the infusion tube 200 with respect to the infusion pump 1 along the T direction, first, the medical worker must The medicine bag display 151 for displaying the medicine bag side of the infusion tube setting direction display part 150 on the opening / closing cover 5, the patient side display part 152 for displaying the patient side, and the liquid feeding for clearly indicating the liquid feeding direction of the medicine The direction display part 153 is visually confirmed.

In addition, as shown in FIG. 2, since the inclined guide portion 54T is exposed without being covered by the opening / closing cover 5, a medical worker directly looks at the inclined guide portion 54T, so that the upstream side of the infusion tube 200 can be seen. It can be easily confirmed that the side 200A may be disposed on the inclined guide portion 54T side.
Then, the medical worker opens the opening / closing cover 5, and arranges the upstream side 200 </ b> A of the infusion tube 200 toward the first infusion tube guide part 54 side on the right side toward the main body 1 </ b> B, and the downstream side of the infusion tube 200. What is necessary is just to arrange | position 200B in the 2nd infusion tube guide part 55 side of the left side part toward the main-body part 1B.

  The medical worker converts the infusion tube 200 shown in FIG. 4 into the first infusion tube guide portion 54, the bubble sensor 51, the upstream occlusion sensor 52, the liquid feeding drive portion 60, the downstream occlusion sensor 53, the tube clamp portion 270, and the first 2 Can be set in the T direction along the infusion tube guide portion 55. Thereafter, as shown in FIGS. 1 and 2, the open / close cover 5 is closed to cover the bubble sensor 51, the upstream block sensor 52, the downstream block sensor 53, the liquid feeding drive unit 60, and the tube clamp unit 270. . Thereby, the infusion tube 200 can be set along the T direction which is the correct direction, and the liquid can be fed along the T direction through the infusion tube 200 by driving the liquid feeding drive unit 60. Then, the medical staff can close the open / close cover 5 by mounting the infusion tube 200 on the tube mounting portion 50 while confirming information on the display portion 3 on the upper portion of the main body cover 2. Then, the medical staff can operate the operation buttons on the operation panel unit 4 while checking the information on the display unit 3 on the upper part of the main body cover 5.

  As described above, when the medical worker closes the opening / closing cover 5, as described above, the following urging force is applied from the tube mounting portion 50 side of the main body 1 </ b> B of the infusion pump 1 to the opening / closing cover 5 side. Join. When the operation member 273 of the tube clamp portion 270 shown in FIG. 6 is pushed by the projection portion 275, the force of the spring 274 is applied to the opening / closing cover 5 side. A reaction force due to a part of the infusion tube 200 shown in FIG. 4 being sandwiched between the infusion tube pressing member 5C and the liquid feeding drive unit 60 is applied to the opening / closing cover 5 side. Then, as shown in FIG. 11, the force of the two springs 407 and 441 is opened and closed by sandwiching the infusion tube 200 between the pressing member 452 and the distal end portion 406 and between the pressing member 453 and the distal end portion 406. Join the cover 5 side.

  Thus, although force is applied to the inner surface side of the opening / closing cover 5 from a plurality of locations on the main body 1B, when the opening / closing cover 5 is closed as shown in FIGS. 1 and 2, FIG. As shown in FIG. 5, the hook member 5D and the hook member 5E are mechanically hooked simultaneously with the fixing portions 1D and 1E on the main body 1B side. As a result, the pressure applied to the opening / closing cover 5 that is generated when the opening / closing cover 5 is closed as described above is received by the two hook members 5D and the hook members 5E, and the opening / closing cover 5 is reliably moved toward the main body 1B. Can be fixed. For this reason, the opening / closing cover 5 can reliably cover the tube mounting portion 50 without being bent, warped or deformed by the force received from a plurality of locations of the main body 1B.

2, when the opening / closing cover 5 is closed, the right hook member 5D shown in FIG. 4 is provided at a position near the opening / closing operation lever 260 of the opening / closing cover 5, and the hook member 5D is positioned on the right side. The opening / closing cover 5 can be held in a closed state corresponding to the pressing force from the pressing member 452 and the pressing force in the infusion tube pressing member 5C. The left hook member 5E shown in FIG. 4 can hold the open / close cover 5 in a closed state corresponding to the pressing force from the left pressing member 453 and the pressing force from the left operation member 273.
As described above, when the open / close cover 5 is closed, the infusion tube holding member 5C applies the infusion tube 200 to the infusion drive unit 60, and the projection 275 of the open / close cover 5 pushes the tube clamp unit 270 to Although a part is closed, the force received by the opening / closing cover 5 from the infusion tube holding member 5C and the force received from the tube clamp part 270 at this time can be received by the first hook member 5D and the second hook member 5E. The opening / closing cover 5 can be prevented from bending. In addition, when the opening / closing cover 5 is closed, the opening / closing cover 5 also receives forces from the first pressing member 452 and the second pressing member 453, but these forces can be received by the first hook member 5D and the second hook member 5E. Therefore, the opening / closing cover 5 can be prevented from being bent.

  As shown in FIG. 2, when the infusion tube 200 is correctly attached along the X direction and the open / close cover 65 is closed, as shown in FIG. 9A, the protrusion 320 of the open / close cover 5 is centered on the rotation shaft 5A. Then, it rotates in the CR direction and enters the guide groove 350. As a result, the infusion tube 200 is pushed by the protrusion 320 and crushed between the protrusion 320, the first guide surface 351 of the guide groove 350, and the second guide surface 352 that is the inclined surface on the rotating shaft 5A side. Can be held without. In this way, the infusion tube 200 can be prevented from being crushed even if it is sandwiched between the protrusion 320 and the inclined second guide surface 352. The hinge portion 2H (open / close cover 5 of the open / close cover 5 shown in FIG. The second guide surface 352 which is the guide surface closer to the rotating shaft 5A) side is an inclined surface, and the first guide surface 351 which is the far guide surface to the hinge portion 2H side is along the Y direction. This is because the surface is flat.

  In FIG. 8 (A), even if any size of the infusion tubes of the plurality of types of infusion tubes 200 having different diameters is attached to the tube attachment portion 50 of the infusion pump 1, the air bubble sensor 51 is closed when the open / close cover 5 is closed. The infusion tube 200 can be inserted into the guide groove portion 350 without crushing, and bubbles in the infusion tube 200 can be detected. That is, when the infusion tube 200 is set in the tube mounting portion 50 and the opening / closing cover 5 is closed, the protrusion 320 of the opening / closing cover 5 enters the guide groove portion 350 of the bubble sensor 51, and a part of the infusion tube 200 is inserted into the guide groove portion. 350 can be held between the first guide surface 351 and the second guide surface 352. The first guide surface 351 on the side farther from the rotation shaft 5A of the opening / closing cover 5 is a surface parallel to the ultrasonic oscillator 331, and the second guide surface 352 on the side closer to the rotation shaft 5A of the opening / closing cover 5 is an inclined surface. Therefore, when the opening / closing cover 5 rotates around the rotating shaft 5A and closes, the protrusion 320 of the opening / closing cover 5 does not sandwich a part of the infusion tube 200 between the second guide surface 352 and the infusion tube There is no crushing. For this reason, the bubble sensor 51 can detect bubbles in the infusion tube 200.

  Returning to FIG. 7A, since the recess 372 is provided in the bottom portion 353 of the guide groove 350, referring to FIG. 9A showing an example of ultrasonic propagation, the ultrasonic oscillation element 331 is shown. The ultrasonic wave HH from can be prevented from entering due to the presence of the recess 372. Accordingly, since the ultrasonic wave HH from the ultrasonic oscillation element 331 does not wrap around due to the presence of the recess 372 and noise is not received by the ultrasonic reception element 332, the detection accuracy of bubbles in the infusion tube 200 is prevented. Can be prevented from falling. Thus, the recess 372 is formed deeper in the Y1 direction side than the position of the other end 331B of the ultrasonic oscillation element 331, and the ultrasonic wave HH from the ultrasonic oscillation element 331 is injected into the infusion tube 200 in the guide groove 350. The ultrasonic wave receiving element 332 is prevented from propagating through the sensor body 330 without passing through a part of the sensor body 330. For this reason, noise can be prevented from entering the ultrasonic receiving element 332, and the bubble sensor 51 can detect bubbles in the infusion tube 200.

  Further, as shown in FIG. 7A, the position of the ultrasonic oscillation element 331 in the Y direction is arranged at a position shifted in the Y1 direction by a distance D5 compared to the position of the ultrasonic reception element 332 in the Y direction. This is because the first guide surface 351 is parallel to the surface formed by the X direction and the Y direction, but the second guide surface 352 is inclined by an angle θ with respect to the Y direction. Accordingly, even if the ultrasonic wave HH from the ultrasonic oscillator 331 is refracted by the second guide surface 352, the ultrasonic wave HH can be reliably received by the ultrasonic receiver element 332. That is, even if the second guide surface 352 is inclined, the ultrasonic wave HH from the ultrasonic oscillation element 331 passes through the first guide surface 351 and a part of the infusion tube 200 and passes through the second guide surface 352 to generate ultrasonic waves. It can be received by the receiving element 332, and the bubble sensor 51 can detect bubbles in the infusion tube 200.

  FIG. 13A shows an arrangement example of the hooks 5D and 5E in the opening / closing cover 5 of the infusion pump 1 shown in FIGS. Since the hook 5D is disposed at the right position and the hook 5E is disposed at the left position in the opening / closing cover 5, the height of the opening / closing cover 5 is reduced and the display unit 3 as large as possible is disposed. be able to. Since the inside of the opening / closing cover 5 employs a structure without an electrical switch or electrical wiring, the weight of the opening / closing cover 5 can be suppressed, and even if the opening / closing cover 6 is made thin, the bending of the opening / closing cover 5 can be suppressed. The opening / closing operation of the opening / closing cover 5 is facilitated.

On the other hand, in another embodiment of the present invention shown in FIG. 13B, the hook 5D of the opening / closing cover 5 of the infusion pump 1 is arranged on the rightmost side of the opening / closing cover 5, and the hook 5E is opened / closed. Is located on the far left.
In another embodiment of the present invention shown in FIG. 13C, the hook 5D of the opening / closing cover 5 of the infusion pump 1 is disposed on the rightmost side of the opening / closing cover 5, and the hook 5E is disposed on the leftmost side of the opening / closing cover 5. In addition, another hook 5N is arranged at the center position of the opening / closing cover. As described above, at least the hook 5D is arranged at the right position and the hook 5E is arranged at the left position in the opening / closing cover 5, but a small hook 5N is additionally arranged at the center position of the opening / closing cover 5. It is also possible to do. Thereby, the opening / closing cover 5 can be fixed to the main body 1B side with a stronger force.
In the opening / closing cover 5, if one large size hook is provided only at the center position in the X direction, the height of the opening / closing cover 5 increases, and therefore the size of the infusion pump 1 may increase. In addition, in the opening / closing cover 5, if one hook is provided only at the right position in the X direction, the opening / closing cover 5 may be bent when the liquid feeding drive unit 60 operates the infusion tube 200.

FIG. 14 shows an example in which a plurality of infusion pumps 1 shown in FIGS. 1 and 2 are mounted on a setting stand 70, and a plurality of infusion pumps 1 can be used simultaneously if necessary. Since the infusion pump 1 can set the infusion tube 200 in the horizontal direction along the X direction, the plurality of infusion pumps 1 in the vertical direction as compared with the case where the infusion tube is set vertically from top to bottom. Can be placed side by side on top of each other.
As described above, when a plurality of infusion pumps 1 of the same type are arranged so as to overlap each other, or when the infusion pump 1 and a pump of a different type from the infusion pump 1, such as a syringe pump 1100, are stacked, The peripheral part or part of the body cover 2 of the infusion pump 1 and the peripheral part or part of the body cover 2 of the syringe pump 1100 are preferably provided with a seal material of a color different from the color of the body cover 2, for example, yellow or red. The mark 770 of the pump can be displayed by pasting or painting. Thus, by providing the pump mark 770, when a plurality of infusion pumps 1 are stacked or used, or when the infusion pump 1 and other types of pumps such as a syringe pump are stacked, There is a merit that the worker can visually recognize the boundary of each pump clearly.
In the infusion pump 1, when a medical worker attaches the infusion tube to the lower part of the main body and covers the infusion tube with the opening / closing cover, the opening / closing cover is prevented from bending, and the medicine is correctly delivered by the infusion tube. can do. That is, when the open / close cover closes the tube mounting portion and the liquid feeding drive portion, even if the open / close cover receives a force from the tube clamp portion, the open / close cover is bent at least by the first hook member and the second hook member. Since it can prevent, even if a liquid feeding drive part drives, a chemical | medical agent can be correctly delivered along a liquid feeding direction.

By the way, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made to the present invention, and various modifications can be made within the scope described in the claims.
In the example shown in FIGS. 1 and 2, the infusion tube 200 is set along the T direction, which is the horizontal direction, by the tube mounting portion 50, but not limited thereto, for example, the tube mounting portion 50 includes the infusion tube 200. Alternatively, a structure may be adopted in which the unit is inclined and set in the lateral direction so as to be lowered by a predetermined angle from the upstream side 200A to the downstream side 200B.

  DESCRIPTION OF SYMBOLS 1 ... Infusion pump, 1D, 1E ... Fixed part (double hook structure part), 2 ... Main body cover (also called main body), 2A ... Upper part of main body cover, 2B ... Main body cover Lower part, 3 ... Display part (an example of warning means), 4 ... Operation panel part, 5 ... Opening / closing cover (lid member), 5C ... Infusion tube holding member, 5D ... Hook (First hook, double hook structure), 5E... Hook (second hook, double hook structure), 50... Tube mounting part (also referred to as line mounting part), 51. ... upstream blockage sensor, 53 ... downstream blockage sensor, 54 ... first infusion tube guide section (upstream infusion tube guide section), 54T ... inclined guide section, 54B, 54C,.・ Protrusions, 55 ... second infusion tube guide (Infusion tube guide section on the downstream side), 60... Liquid feeding drive section, 100... Control section, 200... Infusion tube (also referred to as infusion line), 260. Tube clamp part, 300 ... Double hook structure part, 305 ... Connecting member, 320 ... Projection of opening / closing cover, 330 ... Sensor body part of bubble sensor, 331 ... Ultrasonic oscillator, 332 .... Ultrasonic wave receiving element, 350 ... Guide groove part of bubble sensor, 351 ... First guide surface, 352 ... Second guide surface, 372 ... Concavity of bubble sensor, 441 ... Pressing member Spring (biasing member) 452 ... Pressing member (first pressing member), 453 ... Pressing member (second pressing member), X ... Horizontal direction (lateral direction), T ... Proper feed Liquid direction

Claims (4)

A display unit arranged on one side exposed outside the upper half of the main body,
A tube mounting portion that is a lower portion of the main body and is disposed on the same surface as the one surface, and in which an infusion tube that infuses a drug in a drug bag to a patient side is mounted in a lateral direction;
In a state where the infusion tube is mounted in the lateral direction, a liquid feeding drive unit for feeding the medicine in a liquid feeding direction that is predetermined along the lateral direction;
An opening / closing cover that can be opened and closed around the rotation axis along the lateral direction and covers the tube mounting part and the liquid feeding drive part by closing,
An infusion tube guide portion on the upstream side that holds the infusion tube on the upstream side of the infusion tube attached to the tube attachment portion;
The upstream infusion tube guide portion has an inclined guide portion that obliquely guides the upstream side of the infusion tube, and the upstream infusion tube guide portion is exposed even when the open / close cover is closed,
The display unit as will be mounted horizontally at least in the tube attachment section, an infusion pump, characterized in that a configuration of performing display containing information of the mounting status of the serial infusion tube.   2. The infusion according to claim 1, wherein the inclined guide portion has an angle α from the horizontal direction of 25 to 35 degrees, a height H of 13 to 18 mm, and a horizontal length L of 13 to 18 mm. pump.   The infusion pump according to claim 1, wherein a side surface portion of the opening / closing cover on the upstream side of the infusion tube is formed to be inclined.   The infusion pump according to claim 1, wherein a display unit for displaying information and an operation panel unit having operation buttons are arranged on an upper portion of the main body.

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