JP2005052367A - Syringe pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a syringe pump to be held securely in the immovable state when used, into which a plurality of kinds of syringes can be detachably loaded. <P>SOLUTION: The syringe pump comprises a holder part for holding a barrel of a syringe in which a medical solution is stored and a moving member for moving/driving an end of a plunger inserted into the barrel. The moving member comprises a body part, a pair of arm members 102a and 102b, supported by the body part to be opened/closed and always energized in the closing direction, and a slope 130a formed on a face of each arm member facing the body part for pressing a flange part of the plunger against the body part according to the closing operation of the arm members. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a syringe pump that holds a syringe in a detachable manner and accurately feeds a chemical solution in the syringe by driving a syringe pusher in a predetermined manner, and more particularly, a plurality of types (multiple volumes, multiple syringe manufacturers) of syringes. The present invention relates to a syringe pump that can be detachably mounted and can be reliably held in a stationary state during use.

  Syringe pumps are mainly intended for high-precision injection of nutrient solutions such as nutritional supplements, blood transfusions, chemotherapeutic agents, and anesthetics in ICU, CCU, and NICU. It is widely used because it is superior to other pumps.

In such a syringe pump, a syringe with a chemical solution is set in an immobile state using a syringe pump clamp, a syringe pusher is set on the slider, and then the slider is driven to drive the syringe. The contents in the syringe are accurately sent out by the piston movement of the child. In this case, it is essential that the syringe and the pusher are reliably set in the syringe pump in order for the chemical liquid to be normally delivered from the syringe.
JP 2003-70911 A

  As a method for detecting that the syringe is securely attached to the syringe pump, a method for determining whether or not the syringe pusher is attached is known (Patent Document 1: Japanese Patent Application Laid-Open No. 2003-70911). However, there is a problem that it is difficult to reliably detect whether or not it is mounted at a predetermined position. In addition, the thickness of the flange differs depending on the syringe capacity and syringe manufacturer, and there is a problem that it is difficult to reliably attach.

  Therefore, the present invention has been made in view of the above-described problems, and the object thereof is to attach a plurality of types (a plurality of capacities, a plurality of syringe manufacturers) of syringes in a detachable manner, and to ensure that they are immobile during use. It is to provide a syringe pump that can be held.

  In order to solve the above-described problems and achieve the object, a syringe pump according to the present invention includes a holding means for holding an outer cylinder of a syringe in which a chemical solution is stored, and an end of a pusher inserted into the outer cylinder. In the syringe pump comprising a moving means for moving and driving the body, the moving means includes a main body part, a pair of arm members that are supported by the main body part so as to be opened and closed, and are normally biased in a closing direction, and the pair of arm members. It is formed in the surface facing the said main-body part of an arm member, The slope which presses the flange part of the said presser against the said main-body part with the operation | movement which closes a pair of said arm member is provided.

  Further, in the syringe pump according to the present invention, the upper portion of the main body portion is a hysteresis for preventing the flange portion of the pusher from being mounted in an incomplete state from above with respect to the pair of arm members. A portion is provided.

  In the syringe pump according to the present invention, the pair of arm members are formed long to prevent the flange portion of the pusher from being mounted in an incomplete state from above with respect to the pair of arm members. It is characterized by being.

  In the syringe pump according to the present invention, the holding means includes a pressing member for elastically pressing a flange portion integrally provided on the outer cylinder of the syringe against the main body of the syringe pump. To do.

  According to the present invention configured as described above, a plurality of types (a plurality of capacities, a plurality of syringe manufacturers) of syringes can be detachably mounted, and can be securely held in an immobile state without being erroneously mounted during use. A pump can be provided.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is an external perspective view of the syringe pump 1, and shows the setting dial 6 that is normally operated with the right hand with the operation panel portion 2 f facing forward.

  In FIG. 1, a syringe pump 1 is a micro continuous infusion pump for the purpose of infusion of chemicals such as nutritional supplements, blood transfusions, chemotherapeutic agents, and anesthetics in ICU, CCU, and NICU, and performs flow rate display and the like. As shown in the figure, the operation panel portion 2f is provided so as to be substantially concentrated on the upper surface, thereby improving the operability.

  The operation panel 2f is basically covered with an embossed sheet cover and has a drip-proof design that satisfies the JIS 0920 drip-proof test. For example, carelessly spilled chemicals can be easily wiped off. In addition to being able to do so, it has high drip-proof properties to prevent chemicals and the like from entering the inside.

  For this purpose, the upper cover 2 and the lower cover 3 are integrally formed from a molded resin material having chemical resistance, and a rubber seal 4 made of, for example, silicone elastomer is interposed between the covers 2 and 3. By adopting a screw-fixed configuration, it is configured to prevent foreign substances such as liquid from entering the inside.

  In addition, in order to place importance on improving the accuracy of injection and improving the operability, it is possible to realize precise injection operation control by microcomputer control, and the operation indicator 7 protruding upward at a position that is easily visible from the outside is red. Or, it is lit and blinking in multiple colors in green, and it is displayed in a rotating manner so that its operation state and alarm state can be monitored even from above to ensure safety. Furthermore, a buzzer is also built in, and various alarm functions are provided for safety.

  In addition, because it is small and lightweight, it is easy to carry and is designed to be convenient for use when multiple units are used simultaneously. Furthermore, by turning the setting dial 6 on the right side of the apparatus, the numerical value can be set in a short time according to the rotation speed and the rotation direction, while the set value can be displayed on the display unit 11 of the display panel. Thus, when changing the setting of numerical values such as the flow rate, it can be easily performed with one action by operating the setting dial 6.

  In addition, it has a shape that can be used in multiples (a combination of many) and a design that is easy to use and can be built up. The shape and dimensions are small, for example, height H: 110 mm x width W: 322 mm x depth D: 115 mm The weight is about 1.8 kg, and the power source is an AC commercial power source, a built-in battery, and DC12VA.

  The built-in battery has a charging time of about 20H (hours), and is provided with a cover at the bottom of the lower cover 3 so that it can be easily replaced from the outside, and is detachably connected to the connector. The replacement life is 3 years or more, while the charge control is trickle charge. In addition, overdischarge and prevention of charging are realized through cell damage detection / cell damage safety measures for rechargeable batteries. A heat-resistant (Ni-Cd) battery is used, and a new battery can be operated for 180 minutes or more until an alarm is generated and 210 minutes or more for a shirt down.

  In addition, a display unit 10 for gamma injection (infusion rate per unit weight: μg / kg / min) and each display unit 11 for flow rate / scheduled amount / integrated amount are provided on the operation panel 2f. The setting dial 6 is formed with a recess 6e so that it can be easily removed for cleaning, and it is configured so that it can be removed by moving outward while turning the toe into this portion. .

  Next, in order to set the outer cylinder part 100a (see FIG. 3) of the syringe 100, the upper cover 2 is integrally formed with the syringe stage (syringe outer cylinder mounting part) 2a and the syringe body. While the slit portion 2c in which the SF is set is integrally injection-molded, a clamp column 2b (shown by a broken line) that supports the clamp 5 so as to be rotatable in the direction of arrow A is also integrally formed.

  The slider assembly 50 driven in the direction of the arrow A4 in the figure reciprocates on the concave portion 2d of the case, and is connected and fixed to the slider feed mechanism 33 shown by the broken line. The pusher SP can be easily mounted or removed by manually operating the clutch lever 52.

  FIG. 2 is a plan view of the operation panel unit 2f. In this figure, a power switch 15, an AC / DC lamp 16, and a battery lamp 17 are centrally arranged at the left end. A gamma setting display unit 10 is disposed next to these lamps. However, a model without the gamma setting display unit 10 can be used sufficiently. The gamma setting display unit 10 is provided with a display on / off switch 10a and an item changeover switch 10b.

  On the other hand, when the clamp lever 5 is set on the display unit 10, the volume of the syringe set by automatically measuring the syringe diameter after converting the vertical movement amount of the clamp into an electric signal. A syringe display lamp 18 that displays 10 cc (ml), 20 cc (ml), 30 cc (ml), 50 cc (ml), and the like is provided.

  Also, below the clamp 5 is provided an operation indicator 7 formed so as to protrude upward from a thermoplastic resin such as transparent polycarbonate, etc., and appropriately illuminates the built-in red and green. The light emitting diodes 7a to 7d thus lit up or blink, or light is scattered on the inside so as to rotate, so that the injection operation state can be displayed in an electrical display.

  Next to the clamp 5, display lamps 19 a, 19 b, and 19 c are provided for switching and displaying the set detection pressure by the blockage detection mechanism provided in the syringe pump in three stages. Next to these lamps, a remaining amount alarm lamp 20, a battery alarm lamp 22 and others are intensively arranged.

  Next to these lamps, a 7-segment LED display section 11 having flow rate / planned amount / integrated amount lamps 23, 24, 25 is provided. A display changeover switch 26 and an integration clear switch 27 are provided on the right side of the display unit 11. A fast forward switch 30, a start switch 29, and a stop / mute switch 28 are provided below the display unit 11.

  Next, a syringe mounting part and a pusher driving part, which are characteristic parts of the present embodiment, will be described.

  FIG. 3 is a plan view showing a syringe mounting portion.

  In FIG. 3, the syringe 100 is in a state where the outer tube portion (main body) 100 a is placed on the syringe stage 2 a and the flange SF formed integrally with the outer tube portion 100 a is inserted into the slit portion 2 c. It is attached to the syringe attachment part 80. After the outer cylinder portion 100a of the syringe 100 is placed on the syringe stage 2a, the clamp lever 5 is rotated in the direction of arrow A to be urged and fixed on the syringe stage 2a. At this time, a slope is formed on the lower surface of the clamp lever 5, and as the clamp lever 5 is rotated in the direction of arrow A, the slope rides on the outer cylinder portion 100a of the syringe 100, and the outer surface depends on the rising amount. The thickness of the cylinder part 100a, in other words, the capacity of the syringe can be detected. The slit portion 2c is formed between the first wall portion 2e-1 and the second wall portion 2e-2 that are formed so as to sandwich the flange SF from both sides. The pusher SP of the syringe 100 is clamped with respect to the slider assembly 50 by a pair of clamp arms 102a and 102b. Then, in this state, the slider assembly 50 is driven to the left in the direction indicated by the arrow A4, so that a chemical solution with a constant flow rate is sent out from the syringe.

  FIG. 4 is a perspective view showing a drive unit of the pusher SP of the syringe 100.

  4, the slider assembly 50 includes clamp arms 102a and 102b for clamping the flange portion SP1 (see FIG. 5) of the pusher SP of the syringe 100, with arrows C1 and C2 centering on the fulcrums 104a and 104b, respectively. It is attached so as to be rotatable in the direction indicated by. The clamp arms 102a and 102b are rotated away from each other (opened) by pressing the clutch lever 52 with a finger in the direction of arrow B, and the flange portion SP1 of the pusher SP is attached to and detached from the slider assembly. It becomes possible. The clamp arms 102a and 102b are constantly urged in a closing direction by a spring 106 (see FIG. 7) described later, and are closed by the urging force of the spring 106 by releasing the finger from the clutch lever 52. The flange portion SP1 of the pusher SP is clamped.

  A slider 50a is provided on the upper portion of the slider assembly 50, and the flange portion SP1 of the pusher SP is configured to prevent the slider assembly 50 from being mounted in an incomplete state. . When the flange portion SP1 of the pusher SP is attached to the slider assembly 50 from above, the flange portion SP1 is attached in an incomplete state on the clamp arms 102a and 102b as shown in FIG. However, in this embodiment, since the flange portion SP1 is prevented from being attached from above by the eaves 50a, the pusher SP can be attached only from the direction of the arrow D in FIG. 5, and the flange portion SP1. Is prevented from being mounted incompletely. A support portion 50b for supporting the flange portion SP1 from below is formed at the lower portion of the slider assembly 50. Even if there is no eclipse 50a, if the flange portion SP1 is not set correctly by lengthening the clamp arms 102a, 102b by a predetermined length (about the radius to the diameter of the flange portion SP1 of the largest syringe used), the detection pin 110 Since is not pushed, it is detected that it is not set correctly, and incomplete mounting is prevented.

  In addition, a detection pin 110 that is pushed in when the flange portion SP1 of the pusher SP is mounted is disposed at the center of the slider assembly 50, and by detecting that the detection pin 110 has been pushed in. Then, it is determined that the flange portion SP1 is normally attached to the slider assembly 50.

  The slider assembly 50 is connected to the slider feed mechanism 33 (see FIG. 1) by a shaft (not shown) disposed in the bellows 108, and is driven to feed in the direction of arrow A4.

  In addition, in FIG. 4, a flange pressing member urged in a direction indicated by an arrow E by a spring (not shown) at the center in the width direction of the slit portion 2 c into which the flange SF formed on the outer cylinder portion 100 a of the syringe 100 is inserted. A member 112 is disposed. By pressing the flange SF against the first wall portion 2e-1 by the flange pressing member 112, the flange SF is free of backlash with respect to a plurality of types of syringes 100 having different syringe capacities and different flange SF thicknesses depending on the syringe manufacturer. In this state, the first wall 2e-1 can be held. Thus, the flange SF, in other words, the outer cylinder 100a of the syringe 100 is securely fixed to the syringe stage 2a.

  FIG. 7 is a view of the clamp arms 102a and 102b arranged on the slider assembly 50 as seen from the back side.

  In FIG. 7, arm portions 114a and 114b are formed on the rotation shafts of the clamp arms 102a and 102b, and elongated holes 116a and 116b are formed in the central portions thereof. The elongated holes 116a and 116b are connected to the clutch lever 52 by a not-shown interlocking mechanism, and in the direction of the arrow F around the central axis 118 as the clutch lever 52 is pushed in the direction of the arrow B (see FIG. 4). The drive pin 120 of the rotating member 122 that rotates is inserted. The drive pin 120 is always urged downward by a spring 106, and the clamp arms 102a and 102b are always urged in a closing direction by the spring 106. Then, by pushing the clutch lever 52 in the direction of arrow B as described above, the rotating member 122 rotates in the direction indicated by arrow F, and the drive pin 120 pushes up the arm portions 114a and 114b, and the clamp arms 102a and 102b. Is opened against the biasing force of the spring 106.

  A protrusion 130 having an inclined surface 130a is integrally formed at a substantially central portion on the back surface of the clamp arms 102a and 102b. As shown in FIGS. 8 and 9, the inclined surface 130 a of the protrusion 130 has an edge of the flange portion SP 1 in a state where the clamp levers 102 a and 102 b are closed by the biasing force of the spring 106 and the flange portion SP 1 of the pusher SP is clamped. The flange portion SP1 is pressed against the wall surface 50c of the slider assembly 50. Thereby, it becomes possible to hold the flange part SP1 in the slider assembly 50 in a state where there is no backlash with respect to a plurality of types of syringes whose flange parts SP1 have different thicknesses depending on the syringe capacity and syringe manufacturer. In addition, since the position where the inclined surface 130a abuts on the flange portion SP1 varies depending on the thickness of the flange portion SP1, in the state in which the clamp arms 102a and 102b clamp the flange portion SP1, the distal ends of the clamp arms 102a and 102b are flange portions. Depending on the thickness of SP1, it will stop in a slightly opened state.

  As described above, according to the above-described embodiment, a plurality of different capacities of syringes and different thicknesses of the flanges of the pressers depending on the syringe manufacturers are provided on the back surface of the clamp arm. With respect to the type of syringe, it is possible to hold the flange portion on the slider assembly without any backlash.

  Moreover, it becomes possible to fix reliably the outer cylinder part and flange of a syringe by having the flange pressing member which elastically presses the flange of the outer cylinder part of a syringe.

  Furthermore, since the upper portion of the slider assembly has scissors, the pusher is prevented from being erroneously attached, and the flange portion of the pusher can be reliably attached to the slider assembly.

It is the external appearance perspective view of a syringe pump, Comprising: With the operation panel part ahead, it is the figure which showed so that the setting dial normally operated with a right hand could be seen. It is a top view of an operation panel part. It is the top view which showed the mounting part of the syringe. It is a perspective view which shows the drive part of the pusher of a syringe. It is a perspective view which shows the state by which the presser of the syringe was clamped normally. It is a perspective view showing the state where the pusher of the syringe is not normally clamped. It is the figure which looked at the clamp arm arrange | positioned at the slider assembly from the back surface. It is a figure which shows the state which the clamp lever clamped the flange part of the pusher. It is a figure which shows the state which the clamp lever clamped the flange part of the pusher.

Explanation of symbols

DESCRIPTION OF SYMBOLS 50 Slider assembly 50a Hoshi 52 Clutch lever 102a, 102b Clamp arm 108 Bellows 112 Flange holding member 130 Protruding part 130a Slope

Claims (4)

In a syringe pump comprising a holding means for holding an outer cylinder of a syringe containing a chemical solution, and a moving means for moving and driving an end of a pusher inserted into the outer cylinder,
The moving means is formed on a main body, a pair of arm members that are supported by the main body so as to be opened and closed, and constantly biased in a closing direction, and a surface of the pair of arm members facing the main body, A syringe pump comprising: a slope that presses the flange portion of the pusher against the main body portion in accordance with the closing operation of the pair of arm members. An upper portion of the main body portion is provided with a hook portion for preventing the flange portion of the pusher from being mounted in an incomplete state from above with respect to the pair of arm members. The syringe pump according to claim 1. The pair of arm members are formed long to prevent the flange portion of the pusher from being mounted in an incomplete state from above with respect to the pair of arm members. The syringe pump according to 1. 2. The syringe pump according to claim 1, wherein the holding unit includes a pressing member that elastically presses a flange portion provided integrally with an outer cylinder of the syringe against a main body of the syringe pump.

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