CN86209213U - Twenty-microlitre-specimen blood taking instrument - Google Patents

Abstract

The micro blood sampling pipet used in hospitals has large operating difficulty degree, and the pipet provided with a rubber suction head is inconvenient for high temperature and pressure disinfection. The utility model provides a twenty-microlitre-specimen blood taking instrument with replaceable blood sampling pipet according to the principle that the liquid and the air can be pumped under the atmospheric pressure. The twenty-microlitre-specimen blood taking instrument comprises a pipet, an air cylinder, a piston, a spring, a sleeve rod, a button, etc. The operation is rapid and accurate, the pipet can be disinfected under the high temperature and pressure, and the iatrogenic infection of diseases is prevented.

Description

Twenty-microlitre-specimen blood taking instrument

It is that clinical medical inspection is used at most, the most general project that cytometry and blood red egg are measured.What China's blood sampling was at present used is the foraminate micropipet of rubber suction nozzle.Press...with one's finger during use aperture and Rubber end is expanded suck blood is sucked blood and is unclamped by the hole finger to giving when quantitative, and air enters the suction pipe rear portion by aperture, makes the blood of suction be parked in original position.The operation of this blood sampling pipet is difficult to be grasped, even if work reviewer for many years also be difficult to accomplish accurately, quick.Owing to have the rubber suction nozzle, suction pipe inconvenience high temperature, autoclave sterilization can cause " iatrogenic " infection of diseases such as hepatitis B.At the problems referred to above, purpose of design of the present utility model is to provide a kind of accurate, replaceable 20 microlitre volumetric hemostixes through the autoclave sterilization suction pipe easy and simple to handle, can inhale 10 and 20 microliters of blood.According to the principle that liquid and air can be sucked under atmospheric pressure, hemostix is made up of cylinder, piston, spring etc.Be divided into I and II type by the structure difference.

Accompanying drawing 1 is an I type hemostix structure chart.

Accompanying drawing 2 series are II type hemostix structure chart.

I type hemostix structure is referring to accompanying drawing 1: (1) is suction pipe, and is similar to the micropipet leading portion of present use.Employing glass is made, long 50～80mm, and external diameter 4～5mm, front end have a tapering, and handle in face mill garden, garden outside the rear end, the suction pipe seat hole that can closely insert cylindrical rod (2) front end.Suction pipe internal diameter 0.6～0.8mm is used for sucking blood.Tube wall respectively has an indicating graduation at 10 μ l places and 20 μ l places.Every hemostix is mixed hundred suction pipes, and everyone is with 1, with the back autoclave sterilization during use.(2) be cylindrical rod, make, be the garden cylindricality with plastic injection-moulded, long 40mm, external diameter 13mm, there is the garden shape cylinder-bore of a diameter 1～2mm at the center, and front end has the suction pipe seat hole of diameter 4～5mm, dark 7mm, holds suction pipe (1) and closely inserts.The garden face has screw thread 7mm outside the rear end, screws with the preceding female thread of loop bar (6).Act as with piston (3) and cooperate, finish pumping function.(3) be piston, make that it is shaft-like to be the garden with rustless steel, diameter 1～2mm, long 25～40mm, leading portion can insert in the cylinder-bore of cylindrical rod (2) more closely, and can smoothly move in cylinder-bore.For guaranteeing sealing, can add the grease that plastics is not had influence.Piston rear end has screw thread, can screw in the screw hole of slide bar (9), moves with slide bar.(4) for paying spring, with the steel wire coiled of diameter 0.5～1mm, 3～5 circles.Act as the mobile start bit of suction of confirming button (10).(5) be packing ring, make with metal or plastics, thick 0.5～1mm, external diameter 9mm, there is the hole, garden of a diameter 2～3mm at the center, holds piston (3) and passes through.Act as the power that to pay spring and pass to slide bar (9) uniformly.(6) be loop bar, injection moulding is made, long 30～40mm, and the garden face has screw thread 7mm in the external diameter 15mm, front end, spins with cylindrical rod (2).Outer garden, back face has screw thread 10mm, spins with medicated cap bar (7).Interior front middle part is pair spring storehouse of long 10mm, diameter 10mm.Packing ring (5), pair spring (4) are by in being placed on.The rear portion is the slideway of long 15～25mm, diameter 4～5mm in the loop bar, holds slide bar (9) and slides within it.(7) be the medicated cap bar; Injection moulding is made, long 30～40mm, and external diameter 18mm, the garden face has screw thread 10mm in the internal diameter 14mm, front end, spins with the screw thread of garden face outside loop bar (6) rear end, and rear end face has the hole, garden of diameter 12mm, button (10) is passed expose.(8) be main spring, turn to, 8～12 circles with the steel wire of diameter 0.3～0.8mm.External diameter 6～7mm.Be sleeved on slide bar (9) outside.Act as button (10) is upspring, finish suction action.(9) be slide bar, injection moulding is made, long 30～50mm, and diameter 3.5～4.5mm, front end face have a screw hole, and piston (3) is screwed in.The garden face has screw thread and button (10) to spin outside the rear end.Also can be injected into one with button.Act as and connect button (10) and piston (3).(10) be button, injection moulding is made, long 20～35mm, and external diameter 11.5mm, front end have the outer rotating edge of 1 * 1mm, are subjected to the hole, garden of medicated cap bar (7) rear end face spacing, stop button to be deviate from from the medicated cap bar.The shrinkage pool of diameter 8.5mm, dark 10～15mm is arranged in preceding, and there is the screw hole of a diameter 3.5～4.5mm, dark 6～10mm at the shrinkage pool center, spins with slide bar (9).The button rear end face is depression slightly, is convenient to finger by touching.

Using method and principle: with suction pipe (1) by in the suction pipe seat hole that is inserted in cylindrical rod (2), press...with one's finger and press button (10), overcome the elastic force of main spring (8), slide bar (8), piston (3) are moved forward, piston is discharged 20 μ l air in the cylinder-bore, when slide bar touches packing ring (5), because it is bigger to pay the elastic force of spring (4), feel has resistance point, and this point is suction start bit (first grade).Finger loosens, and button rebounds, and piston moves in cylinder-bore and makes suction pipe suck 20 μ l blood.Row by suction flushing after first grade, downwards by overcoming the elastic force of paying spring, makes the thorough emptying of liquid in the suction pipe during blood again.Inhale 10 μ l blood as needs, can determine by observing suction pipe 10 μ l scales.When not being inconsistent with the suction pipe scale as the 20 μ l amount that sucks, the position of rotating cap bar (7) on loop bar (6) is just the amount that scalable sucks.

II type hemostix structure is referring to accompanying drawing 2-1 and Fig. 2-2, and Fig. 2-1 is 1/4th profiles, and Fig. 2-2 is the sectional side view of Fig. 2-1.(1), (2), (3), (5), title and specification and I type hemostix are identical.(4) be spring, with the steel wire coiled of diameter 0.3～0.8mm, 4～6 enclose, and act as slide block (7) is resetted.(6) be loop bar, injection moulding is made, long 55～70mm, and the garden face has screw thread 7mm in the external diameter 15mm, front end, spins with cylindrical rod (2), and the garden face has screw thread 9mm in the rear end, and jacking block (8) is screwed in.Interior front middle part is the spring storehouse of diameter 10mm, long 18mm.Interior postmedian is the slideway of long 25mm, and Fig. 2-3 is the A-A section of Fig. 2-1, and interior garden arc dia is identical with spring storehouse diameter, and distance is 6mm between two inner planes, holds slide block (7) and slides within it.There is the opening of long 25～40mm, wide 3mm the positive side of loop bar, holds mobile button (9) and penetrates with slide block (7) and be connected.(7) be slide block, injection moulding is made, and is two sides of removing of the garden cylindrical symmetry of long 16mm, diameter 9.5mm, see Fig. 2-4, apart from 5.5mm, there is the groove of long 6mm, wide 2.5mm, dark 4～6mm its arc side, garden between two side planes, and the vertical component effect that holds mobile button (9) inserts.There is a screw hole at the groove center, holds screw (10) and screws in.There is screw hole at slide block frontal plane center, holds piston (3) and screws in.Slide block can be in front and back slip in the slide block storehouse of loop bar (6) under the effect of mobile button (9), as being subjected to a lighter external force, then stopping at packing ring (5) and locate in the time of forward, this point is starting point, as be subjected to a bigger external force can overcome the elastic force of spring (4), can move forward 8～12mm.Slide block moves backward and is subjected to jacking block (8) spacing.(8) be jacking block, injection moulding is made, and is the screw rod of long 8mm, diameter 10mm, and rear end face has a groove for the screw adjusting.Can screw in the screw of loop bar (6) rear end.Act as the displacement of restriction slide block (7).(9) be mobile button, injection moulding is made, can be divided into hands by planar portions and insert the vertical component effect of slide block, plane minister 15mm, wide 7mm, thick 4mm, there is teeth groove on last plane to increase friction, the lower plane center is a vertical component effect, and high 8mm, wide 7mm, thick 2.5mm can insert in the groove of slide block (7) closely.The hole, garden that vertical component effect has diameter 1.8mm is passed at mobile button center, and screw (10) is penetrated.Move button by finger push, slide block (7), piston (3) front and back are moved.(10) be screw, be the metal screw of long 12mm, diameter 1.5mm, tail diameter 3mm, pass mobile button (9) screw hole, screw in the slide block (7), mobile button is fixed on the slide block.

Using method and principle: thumb and little finger of toe refer to that last, other three infra clamps hemostix, thumb is by touching forward on mobile button (8), slide block (7), piston (3) move forward thereupon, when slide block touches packing ring (5), be subjected to the resistance of spring (4), this point is first grade, and at this moment piston is discharged 20 μ, 1 air from cylinder-bore.The tenacious backward more moving mobile button (9) of thumb, piston (3) moves in cylinder-bore 20 μ l blood is sucked suction pipe (1).By the each amount that sucks of rotation jacking block (8) scalable.Pass moving button (9) more forward the blood in the suction pipe (1) is discharged, suction flushing pusher to the first grade pushes away forward again, overcomes the elastic force of spring (4), with the thorough emptying of the liquid in the suction pipe, finishes once and sucks blood.

This hemostix working of plastics can adopt the injection moulding of ABS engineering plastics to make.When piston (3) and cylinder-bore were 1.5mm, I type hemostix total length was 110mm; II type hemostix total length is 95mm.(not comprising suction pipe (1)).Suction pipe is replaceable during use, and everyone with the back autoclave sterilization, can prevent the iatrogenic infection of diseases such as " hepatitis ies " with 1.The hemostix operation is quick, accurate, easy, can effectively increase work efficiency.

Claims (4)

1, is used to gather device 20 microliters of blood, that form by suction pipe [1], cylindrical rod [2], piston [3] etc.It is characterized in that aspirating quantitative blood by limiting the displacement of piston [3] in the cylinder-bore of cylindrical rod [2].

2, according to the described device of claim 1, it is characterized in that suction pipe (1) made by glass, tube wall has the scale of 10 μ l and 20 μ l, and the seat hole that communicates with cylinder can be inserted in the rear end.

3,, it is characterized in that the cylinder-bore diameter 1～2mm at cylindrical rod (2) center according to the described device of claim 1.

4, according to the described device of claim 1, the diameter that it is characterized in that piston (3) is 1～2mm.

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