CN2042730U - Portable medical fluid infusion apparatus - Google Patents

Abstract

The utility model relates to a portable medical transfusion device. The device comprises a needle head, a transfusion conduit pipe, a transfusion pipe line with storing containers being in order connected and a transfusion pump composed of a pump head, a driving mechanism, a transmission mechanism and a bearing mechanism. The device is suitable for making the transfusion salvage to for patient during the field and transferring way (for example, an ambulance car, a lorry, a stretcher, etc) and the device is also suitable for a sugar diabete patient, an infertility and a tumor patient to carry with the device to carry out the frequent hormones or medical liquid injection with fixed quantity at fixed time. The output flow rate of the device can come to the accuracy of micro upgrade.

Description

Portable medical fluid infusion apparatus

This utility model is a kind of medical infusion device, relates to the apparatus of medium being imported human body.

As everyone knows, the traditional infusion device is made according to gravity principle, and it needs drip stand to hang or the special messenger carries transfusion and ability infusion.Very inconvenience when this device in the open air or (as ambulance, truck or stretcher etc.) do the transfusion rescue in transporting on the way; and; frequently import the patient of hormone or medicinal liquid at regular time and quantity for many needs; as to the diabetes patient; infertility patient; tumour patients etc., this device had both limited patient's daily routines, was difficult to again satisfy to time and all transfusion requirements of the strict control of need of dose.

Pump formula infusion set is a kind of transfusion form of novelty, and it utilizes direct current generator to drive an eccentric roller, pushes deformable transfusion catheter, thereby reaches the purpose of transfusion.But inhomogeneous by the infusion rate that eccentric rotates, the brush of direct current generator is easy to wear, and inertia is arranged during braking, and the stability and the control accuracy of influence transfusion connect inverse time at electric power polarity, also can reverse the accident that causes patients'blood or body fluid suck-back because of motor.

The purpose of this utility model is the pump formula infusion set that will provide a kind of simple and reasonable for structure, small and exquisite, easy to use, safe and reliable, can accurately control infusion rate and advance the medicine time.

This utility model is achieved in that infusion set comprises by syringe needle, transfusion catheter, infusion pipeline and infusion pump that the storage liquid container links to each other in turn.Infusion pump is made up of pump head, driving mechanism, drive mechanism and supporting device.Pump head is a hydraulic fluid wheel that one group of little roller is housed, and its outer rim one side fixedly is equipped with the curved seat of a crescent moon, keeps certain clearance with it, and the transfusion catheter stage casing just is embedded in this gap.Driving mechanism is a two-phase stepper motor, the one end sealing of its stator 12, other end opening circularizes the chamber, the centre has a longitudinal groove that stator 12 is divided into the two halves that an end links to each other, the one end is with a coil bag 13, be placed in the annular chamber part omitted off-center place of stator 12 behind rotor 14 radial magnetizings, drive mechanism is a gear reduction box.

This utility model adopts roller hydraulic fluid wheel and the curved seat of crescent moon to make pump head, drive by the custom-designed two-phase stepper motor that can move in the direction of the clock all the time, when hydraulic fluid is taken turns by driving mechanism, when driving by drive mechanism, little roller on the hydraulic fluid wheel rolls thereupon, the extruding transfusion catheter, thus reach the transfusion purpose.Thereby guaranteed the stability of transfusion, can make the medicinal liquid in the conduit evenly press to syringe needle at regular time and quantity, blood or body fluid suck-back phenomenon can not take place, owing to use roller hydraulic fluid wheel making that the transfusion metering becomes more accurately, reliable and safety.In addition, the protectiveness pogo barrel is housed, can prevents that silica gel catheter from producing bubble because of being subjected to unexpected extruding at the leading portion of transfusion catheter, and on the spacing Yushan Hill font fixed support of energy.

The following drawings and embodiment will help further understanding of the present utility model, and Fig. 1 is the structural representation of infusion set described in the utility model; Fig. 2 is the pump head cut-away view.

1 is the butterfly syringe needle among the figure, and 2 is pogo barrel, and 3 is the silica gel transfusion catheter, 4 is mountain font fixed support, and 5 are roller hydraulic fluid wheel, and 6 are the curved seat of crescent moon, 7 is support plate, 8,9 is upper and lower clamping plate, and 10,11,15 is gear I, II, III, and 12 is stator, 13 is the coil bag, 14 is rotor, and 16 is medicated bag, and 17 is roller.

The micro-infusion pump that this utility model provides is made up of pump head, driving mechanism, drive mechanism and supporting device.Its pump head is a hydraulic fluid wheel 5, in adorn 4 little rollers 17, its outer rims and the curved seat 6 of crescent moon that is fixed on the support plate 7 keeps certain intervals, its size can just embed deformable silica gel transfusion catheter 2, and make little roller 17 can be on tangent position when rotating abundant extruded conduit, make the medicinal liquid in the pipe press to syringe needle.Pump head drive mechanism is miniature two-phase stepper motor, and it is by stator 12, and rotor 14 and coil bag 13 are formed.The one end sealing of stator 12, other end opening circularizes the chamber, the centre has a longitudinal groove that stator 12 is divided into the two halves that an end links to each other, be with a coil bag 13 at stator 12 1 ends by the single cord coiled, be placed in the annular chamber part omitted off-center place of stator 12 behind rotor 14 radial magnetizings, so that 14 of rotors rotate towards a direction.After coil 13 passes through pulse current, produce alternating magnetic field, make rotor 14 by 180 ° of certain orientation deflections, because rotor 14 in the off-center position of annular chamber, moves in the direction of the clock all the time so can guarantee rotor 14.Drive mechanism is that a gear reduction box is made up of three groups of gears that vary in size and tooth axle, is installed in the upper and lower clamping plate 8,9 of supporting structure.The leading portion of conduit 3 is equipped with pogo barrel 2.The rotation of rotor 14 is passed to gear 15 by the axle tooth, pass to gear 11 by the axle tooth of gear 15 again, axle tooth by gear 11 passes to gear 10 again, because three groups of gears is not of uniform size, speed reducing ratio can reach 240:1, driving the hydraulic fluid wheel 5 that is fixed on it by gear 10 moves in the direction of the clock, thereby driving little roller 17 rotates, and be embedded in silica gel catheter 3 in hydraulic fluid wheel 5 and the curved seat of crescent moon 6 gaps in the extruding of tangent position, because 4 little rollers 17 equidistantly are distributed on the outer rim of hydraulic fluid wheel 5, no matter where hydraulic fluid wheel 5 is in, and has the outer rim of a little roller 17 and curved 6 of crescent moon tangent all the time, makes infusion pump liquid that can not when not working flow backwards.Have only when little roller 17 pushes silica gel catheters 3 when hydraulic fluid wheel 5 rotates liquid output is just arranged, four little rollers 17 have also prevented the wriggling of conduit simultaneously.The flow size of output liquid depends on the number of times that two-phase stepper motor is rotated, because two-phase stepper motor is subjected to the control of calibration pulse signal, so output flow can be accurate to micro updating.

Claims (3)

1, a kind of portable medical transfusion device, comprise by syringe needle, transfusion catheter, infusion tube that the storage liquid container links to each other in turn and the infusion pump of forming by pump head, driving mechanism, drive mechanism and supporting device, it is characterized in that pump head is the hydraulic fluid wheel 5 that one group of little roller 17 is housed, in its outer rim one side the curved seat 6 of one crescent moon is housed fixedly, with its maintenance certain clearance; Driving mechanism is a two-phase stepper motor, the one end sealing of its stator 12, other end opening circularizes the chamber, the centre has a longitudinal groove that stator 12 is divided into the two halves that an end links to each other, the one end is with a coil bag 13, be placed in the annular chamber part omitted off-center place of stator 12 behind rotor 14 radial magnetizings, drive mechanism is a gear reduction box.

2, medical infusion device according to claim 1 is characterized in that said gear reduction box is made up of three groups of tooth axle and gears that vary in size.

3,, it is characterized in that the leading portion of transfusion catheter 3 is equipped with pogo barrel 2 and spacing on mountain font support 4 according to claim 1,2 described medical infusion devices.

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