US3626929A - Apparatus for obtaining a percutaneous and digital blood sample - Google Patents
Apparatus for obtaining a percutaneous and digital blood sample Download PDFInfo
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- US3626929A US3626929A US843016A US3626929DA US3626929A US 3626929 A US3626929 A US 3626929A US 843016 A US843016 A US 843016A US 3626929D A US3626929D A US 3626929DA US 3626929 A US3626929 A US 3626929A
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- shackle
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- block
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150015—Source of blood
- A61B5/150022—Source of blood for capillary blood or interstitial fluid
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150053—Details for enhanced collection of blood or interstitial fluid at the sample site, e.g. by applying compression, heat, vibration, ultrasound, suction or vacuum to tissue; for reduction of pain or discomfort; Skin piercing elements, e.g. blades, needles, lancets or canulas, with adjustable piercing speed
- A61B5/150061—Means for enhancing collection
- A61B5/150068—Means for enhancing collection by tissue compression, e.g. with specially designed surface of device contacting the skin area to be pierced
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150343—Collection vessels for collecting blood samples from the skin surface, e.g. test tubes, cuvettes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150381—Design of piercing elements
- A61B5/150412—Pointed piercing elements, e.g. needles, lancets for piercing the skin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150748—Having means for aiding positioning of the piercing device at a location where the body is to be pierced
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150977—Arrays of piercing elements for simultaneous piercing
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15101—Details
- A61B5/15103—Piercing procedure
- A61B5/15107—Piercing being assisted by a triggering mechanism
- A61B5/15113—Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15101—Details
- A61B5/15115—Driving means for propelling the piercing element to pierce the skin, e.g. comprising mechanisms based on shape memory alloys, magnetism, solenoids, piezoelectric effect, biased elements, resilient elements, vacuum or compressed fluids
- A61B5/15117—Driving means for propelling the piercing element to pierce the skin, e.g. comprising mechanisms based on shape memory alloys, magnetism, solenoids, piezoelectric effect, biased elements, resilient elements, vacuum or compressed fluids comprising biased elements, resilient elements or a spring, e.g. a helical spring, leaf spring, or elastic strap
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150175—Adjustment of penetration depth
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150381—Design of piercing elements
- A61B5/150442—Blade-like piercing elements, e.g. blades, cutters, knives, for cutting the skin
Definitions
- Eglington ABSTRACT Apparatus for automatically obtaining a percutaneous and digital blood sample in conjunction with a blood collector device having a resiliently crushable mouthpiece housing a pair of incisor lancets, the apparatus including a mounting for the collector device, clamping means for holding the tip of a finger on the crushable mouthpiece, a mechanism for striking the collector device in the mounting to drive the lancets into the finger, and means for massaging the finger to cause blood to flow out of the resulting incisions.
- PATENTEU BEBMBYI 31525929 sum 1 0F 7 PATENIEMEBMM 31626929 SHEET 0F 7 llll F IG.
- This invention relates to apparatus for obtaining a percutaneous and digital blood sample.
- a percutaneous and digital blood sample can be obtained as follows: once the finger has been disinfected, its skin is pricked by means of a stylet to a depth of about 2 to 3 mm.; this causes a first drop of blood to appear that contains a relatively substantial quantity of liquid originating from the subcutaneous cells and which is eliminated by swabbing it with, for example, cotton wool. The pricked finger is then massaged towards the incision to urge further drops of blood to appear and these further drops are collected in a test tube or a capillary, or are sucked into a tube open at both ends.
- An object of the invention is to automate the various operations that are involved in the taking of a percutaneous and digital blood sample in such a way that the subject from whom the sample is to be taken can himself take this sample, practically without the intervention of trained personnel.
- apparatus for obtaining a percutaneous and digital blood sample in conjunction with a blood collector device which comprises a tube in the month of which is fitted a resilient funnel member fitted with at least one incisor lancet directed towards the open end of the funnel member, said apparatus comprising a mounting formed with a through passage in which said tube can be removably inserted up to said funnel member to support the blood collector device, said through passage having a length less than the length of said tube whereby the inner end of the tube will project out of the rear end of said through passage when said funnel member comes into contact with the mounting adjacent the front end of said through passage; a striker mechanism having a releasable striking member facing the rear end of said through passage and adapted to strike, when released, the inner end portion of the tube, when the latter is inserted in said through passage, thereby to tend to propel said tube out of said through passage so that when a portion of the finger from which a blood sample is to be taken is placed on the funnel member at the open end thereof, said resilient funnel member
- FIG. I is a perspective transparent view showing the main component parts of one construction form of apparatus according to the invention.
- FIGS. 2 to 9 are sections taken across the middle of the apparatus shown in FIG. 1, showing the various positions occupied by the component parts of this apparatus in the course of a blood sampling operation;
- FIG. I is a diagram of the electric control circuit of the apparatus shown in FIG. 1;
- FIGS. 11 and 12 are sectional elevations of a blood collector device that can be used with the FIG. 1 apparatus.
- FIGS. 13 to 16 show, in sectional elevation, various stages in the operation of a modified detail of the FIG. 1 constructional form of apparatus.
- the apparatus shown in FIGS. 1 to 9 comprises a casing 1 having a base 2, formed by a rectangular plate, and a covering body 3 removably mounted on the base 2.
- the base 2 and the body 3 are preferably made of a synthetic plastics material.
- the body 3 is formed in its front wall with a circular opening 3a (FIG. 2) through which projects a pushbutton 4; in its rear wall with a rectangular cutout 3b which extends over the entire height of the rear wall to accommodate a block secured to the base 2; and in its top wall with a pair of rectilinear parallel slots 30 which extend from the upper edge of the cutout 3b toward the front, with a first, circular, opening 3d located in front of the slots 30, a second, rectangular, window 32 through which projects a block 6, and with another pair of rectilinear parallel slots 3f which are located between the opening 3e and the front wall and which are in alignment with the slots 3c.
- a circular opening 3a FIG. 2
- a rectangular cutout 3b which extends over the entire height of the rear wall to accommodate a block secured to the base 2
- a pair of rectilinear parallel slots 30 which extend from the upper edge of the cutout 3b toward the front, with a first, circular, opening 3d located in front of the
- Block 5 has pivotally mounted on the upper portion thereof, at 7, a shackle 8 having a hollow portion 8a of U cross section in which is secured, as by adhesive, a pad of synthetic sponge 9.
- the shackle 8 is formed with a pair of parallel lugs 8b coplanar with the limbs of portion 8a and connected to one another by a pin (FIG. 1
- One of the lugs 8b has secured to the outside thereof a stud 8d adapted to actuate a switch 10, mounted on the base 2 beside block 5, when the shackle 8 reaches a predetermined angular position upon being swung clockwise about pivot 7, as will be explained in greater detail further on.
- the spacing between lugs 8b is equal to that between the slots 30 and their thickness is slightly less than the width of these slots so that they may move freely therethrough when the shackle 8 is swung backwards and forwards as for example between the positions shown in FIG. 2 and in FIG. 4.
- a spring 11 having a downwardly projecting arm on which the pin 80 can come to hear whenever the shackle 8 is moved clockwise into the position shown in FIG. 3 and beyond (FIGS. 4 to 6).
- the shackle 8 is extended by a pair of parallel arms 8e coplanar with the limbs of the central portion 8a and having a slightly arcuate outline centered on pivot 7.
- the distance between the center line of each arm 8e and the axis of pivot 7 is substantially equal to the distance between this axis and the middle of each slot 3 ⁇ .
- the spacing between the arms 8e is equal to that between the slots 3f whereas their width and their thickness are slightly less than the length and the width of these slots so that when the shackle 8 is swung clockwise or forward, for example to the position shown in FIG. 4, its arms 8e may pass freely into the slots 3f, over their entire length if need be.
- the outer edges of the arms 8e are moreover each formed with a series of saw teeth 8f.
- a mounting 12 having a transverse portion at the top thereof and a pair of legs which are secured to the base 2 and which are formed with a pair of upwardly extending slots wherein are slidably mounted the end portions of a pin 13 subjected to the action of a pair of tension springs 14 on the outside of the mounting l2 and secured at their top ends to a pair of studs 12b.
- the transverse portion of the mounting 12, which lies beneath the opening 3d in the casing body, is formed with several passages, i.e., a first passage, 120, which extends generally upwardly though the middle of the transverse portion and which lies opposite the opening 3d, a second passage, 12d, which extends horizontally through part of the transverse portion between the passage 12c and the front face of the mounting l2; and third and fourth passages, l2e (FIG. 1) and 12f (FIG. 2), which extend horizontally and coaxially from the passage 12c to the opposite side faces of the mounting l2, passages l2e and 12f lying at a level slightly higher than passage 12d and at right angles to the latter.
- a first passage, 120 which extends generally upwardly though the middle of the transverse portion and which lies opposite the opening 3d
- a second passage, 12d which extends horizontally through part of the transverse portion between the passage 12c and the front face of the mounting l2
- Passage 120 is adapted slidably to receive a tube forming part of a blood collector device 15 which will be described in greater detail later with reference to FIG. 11; the length of passage 12c is less than that of the tube.
- Passage 12d has slidably mounted therein an actuating element for controlling a switch 16 which is mounted on the front face of the mounting 12 and the utility of which will become apparent later.
- Passage l2e serves to house a photoelectric cell C (FIG. 10) and passage 12f serves to house an electric bulb A (FIG. 10) for illuminating the cell C.
- the lever 17 is made of a material having a relatively high specific weight, e.g., brass or copper, and rests on the sliding pin 13.
- the lever 17 is formed with an upwardly turned portion 170 in the tip of which is formed a groove 17b parallel to its pivotal axis
- the width of the lever 17 is less than the spacing between the lugs 8b of shackle 8 to allow relative movement between these parts.
- the position of the mounting 12 on the base 2 is so chosen that the mean vertical plane of the mounting, along which the cross sections of FIGS. 2 to 9 have been made, is also the mean plane of the shackle 8.
- the length of the springs 14, the length of lever 17 and the position of the pivotal pin 18 are such that when the shackle 8 is swung clockwise or forwards in the direction of arrow F (FIG. 2), the pin 8c, in the course of its circular motion, comes into engagement with the lever 17, in particular with its upwardly turned portion 170 (FIG.
- the illustrated apparatus comprises, as already stated, a block 6 which projects through an opening 3e formed in the top wall of the casing body 3.
- This block 6 is formed in its upper surface with a V-shaped recess 6a and is fixed to a lever 19 mounted on an eccentric (not shown) driven by the output shaft 20 a powered by an electric motor M via a speed reducing gear of which one wheel can be seen at 20 in the drawings.
- the lever 19 is formed with an abutment 19a adapted to engage one end of a lever 21 carrying the armature 22 of a relay having a winding 23 and a magnetic circuit 24.
- the lever 21 is pivotally mounted at 21a on a further lever 25 which is in turn pivotally mounted at 25a on a block 26 secured to a platform 27 which also supports the motor M and which in turn rests on the base 2 of the apparatus via a socle 28.
- a stem 29 Through the top end of lever 25 extends a stem 29 in which is formed a notch 29a extending along its entire length thereby to fonn a sufficiently sharp catch to engage with the teeth 8f along the front edges of the arms 8e of shackle 8 when the latter has been swung down (FIGS. 4 to 6).
- a spring 30 which is secured at one end to the block 26 and which bears near its opposite end on the stem 29 serves to keep the latter in a position of engagement.
- the magnetic circuit 24 and its winding 23 are mounted in the opening of a supporting frame 31 to one side of which are provided a pair of projecting lugs 31a by means of which the frame 31 can be mounted on lever 25, the lugs being secured to the opposite faces of lever 25.
- the block 26 is formed with a horizontal passage 26a through which extends a slidable pin 26b whose ends contact the lever 25 and the pushbutton 4 respectively.
- lever 21 it can occupy either of two positions depending on whether or not the relay winding 23 is energized.
- lever 21 comes to bear under the action of its own weight on a pin 21b secured to the casing of motor M, so that the projection 19a on lever 19 cannot come into contact with lever 21, whatever may be the position occupied by lever 19 in the course of its eccentric motion.
- a the field that is set up by the magnetic core 24 causes the armature 22 to be attracted thereby causing lever 21 to be rocked about its pivotal axis 21a into a raised position (FIGS.
- FIG. 10 The motor M, the lamp A and the winding 23 are supplied with electric current by means of a circuit which is diagrammatically illustrated by FIG. 10.
- FIG. 10 In this FIG. are also to be found the switches 10 and 16, here referenced 10* and 16*, the photoelectric cell C, the magnetic core 24 of winding 23, and the pushbutton 4, here referenced 4*.
- the positional relationship of elements 4, 10, 23 and 24 does not in this Figure correspond in any way to reality but their functional representation is however correct.
- the shackle 8 is released from the stem 29 and swings upwards under the action of the spring 11 causing the stud 8d to open the switch 10.
- the 'electric circuit of the apparatus which is supplied with current by a source S consisting of a series of cells housed in a casing S (FIG. 1) secured to the base plate 2, comprises an amplifier which includes a pair of NPN- type transistors, T and T,, a pair of PNP-type transistors, T, and T and a resistor R this amplifier being controlled by the photoelectric cell C and serving to ensure energization of the winding 23 upon receipt of a suitable signal from the cell C.
- the cell C and the source of illumination A serve to determine when the transparent or translucent tubular body of the collector device 15 has been filled with a sufiicient quantity of blood, the cell producing signals which are different when receiving a light beam of full intensity from source A or a light beam of lesser intensity, as when the blood that has collected in the tube has reached the level of the light beam issuing from source A.
- the supply of current to the light source A which takes place through a resistor R, only occurs when the switches 10 and 16 are closed, i.e., only when the shackle 8 has been swung into its lowered position (FIG. 4) and when a blood collector device 15 has been inserted into the passage 12c of the mounting 12.
- the motor M which can only be supplied with current when these switches have been closed.
- the amplifier consisting of transistors T to T and of resistor R and the resistor R, are housed in a casing B mounted on the platform 27.
- FIG. 1 Before describing the operation of the illustrated apparatus, a few particulars will be given about a preferred form of blood collector device that can be used in conjunction with the apparatus for taking and collecting a blood sample (FIG. 1 1).
- This device comprises a tubular body 32 of transparent or translucent material, for example polyethylene, in the mouth of which is engaged a plug 33 constituting the lower, discharge, part of a funnel member 34 having a cuplike portion 35 of resilient plastics material.
- the cup 35 rests on the rim of the mouth of the tubular body 32 by means of an annulus 350 provided at the base of the cup 35.
- the wall of the cup 35 and the plug 33 are formed with an L-shaped groove 36 forming a passageway which allows the air contained in the tubular body 32 to escape as the latter is being filled with liquid, in particular blood.
- a capillary cannula 37 extending nearly to the bottom of the body 32, coaxial with said body and forming an extension of an axial passage in the plug 33.
- the plug 33 and the cannula 37 form an integral unit made of synthetic resin.
- annular groove 35b in which is held the peripheral part of a circular metal plate 38, for example of stainless steel, which is provided with two triangular lancets 38a and 38b extending perpendicularly to the plate 38, on opposite sides of a slot 39 in said plate.
- a circular metal plate 38 for example of stainless steel
- annular pad 40 of absorbent material e.g. blotting paper, impaled on and held in position by the lancets 38a and 38b.
- the slot 39 and the opening in the pad 40 lie opposite one another and are in alignment with the central passage in plug 33.
- the part of the lancets 38a and 38b that projects above the pad 40 has a length of at least 2 to 3 mm.; these lancets may extend further but not beyond the level of the upper rim of cup 35.
- lancets 38a and 38b which are intended to form the cutaneous incisions that have to be made for taking a blood sample, as will now be seen.
- a blood collector device is inserted through the opening 3d in the casing body 3, and into the passage 12c of mounting 12 until the funnel member of the device 15 comes to rest on the mounting 12 at which point the lower end portion of its tubular body will project into the space lying between the legs ofthe mounting 12, as shown in FIG. 3.
- the subject lays his hand on the apparatus casing l and places the tip of his disinfected finger on the mouth of the cup formed by the funnel member of device 15, and places the middle joint and the adjoining part of the top joint of this finger in the V-shaped recess 60 that is provided in the block 6.
- the shackle is then moved in the direction of arrow F to bring it into the position shown in FIG. 4.
- the pin 80 comes into engagement with the top surface of the lever portion 170 to depress the lever 17 and hence to tension the springs 14.
- the pin 8c reaches the groove 17b along the tip of the lever portion 170 the arms 8a of the shackle start to extend through the slots 3f in the casing body 3 without however yet being in a position where the teeth 8f can begin to come into meshing engagement with the notched stem 29 (FIG. 3). It is in this position of the shackle 8 that the pin 8c begins to bear on the spring 11.
- the device 15 cannot, as a unit, rise beyond the point where the subject's finger is resting on the top of its funnel member 34, but because the walls of the cup 35 are collapsible, in view of the fact that the funnel member 34 is made of resilient material, and because the tubular body 32 is slidingly mounted in the passage 12c of mounting 12, the tubular body 32 can nonetheless be made to move upwards under the percussive action of the striking lever 17 to drive the lancets 38a and 38b into the flesh of the finger (FIG. 12) to a depth corresponding to the length of the projecting portions of the lancets, thereby making the desired incisions in the epidermis and the dermis.
- lever 17 Once lever 17 has imparted all its kinetic energy to the blood collector device, it ceases to exert any force on the latter and drops back on to the sliding pin 13. Thus, once the desired incisions have been made, the tubular body 32 will be forced back to its initial position under the action of the defonned elastic walls of the cup 35 tending to resume their normal uncollapsed position (FIG. 11), and the lancets 38a and 38b will be withdrawn from the incisions they have made although remaining in close proximity to the latter.
- the shackle 8 While the striking action is taking place, the shackle 8 will have reached the position shown in FIG. 4. In this position the pad 9 has come to bear on the top of the first and second finger joints, the notched stem 29 has come into engagement with the teeth 8f provided along the shackle arms 8e and the stud 8d has caused the switch 10 to close so that the control circuit for the apparatus may supply electric current to the motor M, the lamp A and the cell C.
- the finger finds itself tightly held between the block 6, along the bottom, the padlined shackle portion 8a, along the top, and the limbs of the shackle portion 80, along the sides, the grip exerted on the finger being variable, in particular in the plane of FIG. 4.
- the variable gripping action exerted by the finger-holding arrangement is due to the fact that the block 6 is movably mounted and is eccentrically driven by the motor M in the direction of arrow f (FIG.
- the block 6 is made to move to and from in relation to the incised tip of the finger and is also made to move upwards as it moves towards the incised finger tip and to move downwards as it moves away from the incised finger tip.
- the finger thus finds itself being periodically subjected to a kind of massaging action from back to front by compression of the part of the finger that lies on the block 6, and this massaging action causes the blood flowing to this part of the finger to be urged towards the incisions so as to issue therefrom in the form of drops which are collected in the cup of the funnel member of device 15.
- the first few drops of blood thus collected in the cup contain a high proportion of physiological liquid which originates from the subcutaneous cells lying near the incisions and which is clearly undesirable in the blood sample. That is why there is provided at the bottom of the funnel member cup 35 an absorbent pad 40 which will soak up these few drops of impure blood and it is only when the pad 40 has been sufiiciently impregnated with a mixture of physiological liquid and blood, that the clean blood then issuing from the finger will begin to flow into the tubular body 32.
- the lancets considerably facilitate this flow because, although removed from the epidermis, they remain directly opposite the incisions they have made and are at a sufficiently short distance from them to enable the drops of blood issuing from the incisions to fall on and be ruptured by the tips of the lancets, whereupon they will flow rapidly over the surface of the latter into the outlet opening of the funnel member 34.
- the lancets thus play the part of effective collectors preventing the formation of a thick blood dispersion in the cup 35.
- the latter causes the relay winding 23 to be energized, as already described, thereby to move the lever 21 to its raised position (FIG. 6) and hence to release the shackle 8 from engagement by the notched stem 29 whereby the shackle 8 may move to the position shown in FIG. 7.
- the switch is, as a result, opened so that the motor M and the lamp A cease to be supplied with electric current.
- the massaging action of the finger then stops and since the latter is no longer gripped in the holding means formed by the shackle 8 and the block 6, the subject can remove his hand from the apparatus.
- the blood collector device is so positioned in the apparatusthat it would be particularly difi'rcult for it be extracted from the latter by hand, once full. That is why the extraction operation is here done, at least partially, in a mechanical manner. This is achieved by lifting the shackle 8 into the position shown in FIG. 8 since, in doing so, the pin 8c comes to bear on the underface of the lever portion 170 and progressively comes to lift lever 17 which in turn gradually lifts the blood collector device out of the casing body 3, until such time as the lever 17 abuts against the underside of the transverse portion of the mounting 12.
- lever portion 17a has a rounded outline, that the center of curvature of this rounded outline comes to coincide substantially with the pivotal axis 7 of the shackle 8 when the shackle 8 reaches the FIG. 8 position, and that radius of this rounded outline is slightly greater than the distance between the pivotal axis 7 and the oppositely facing surface of the pin 80. Consequently, when the lever 17 is in the F l0. 8 position, there is nothing to prevent the shackle 8 from being swung back further to the position shown in FIG, 9, this being the same position as the starting position shown in FIG. 2, and once the pin 8c has been raised to a level higher than the tip of lever portion 170, the lever 17 will drop back on to the sliding pin 13, and the apparatus is then ready for a fresh blood sampling operation.
- FIGS. 13 to 16 illustrate a modified constructional form of finger holder.
- This holder which also serves to maintain a finger by its tip on a blood collector device and to massage the finger whereby blood is made to flow towards the incisions made in the finger tip, comprises a stirruplike member 41 whose limbs extend through slots (not shown) into the casing 42 of the apparatus where they are pivotally mounted on a pin 43 eccentrically driven by the output shaft 44 of a motor (not shown), and further comprises a swell 45 which is provided on the top surface of the casing 42 between the limbs of the stir ruplike member 41 and on which the subject from whom a blood sample has to be taken is meant to put one of his fingers. Underneath the top of member 41 there is provided a pad 46 of synthetic sponge via which member 41 comes to bear on the finger.
- FIGS. 13 to 16 wherein the stirruplike member 4] The manner in which the finger is massaged as illustrated by FIGS. 13 to 16 wherein the stirruplike member 4] is shown occupying four different positions as a result of the shaft 44 having been rotated each time through 90 in relation to the previous position.
- the illustrated apparatus has of course only been given by way of example and a number of other constructional forms could be envisaged.
- the apparatus could be designed to be normally static and be adapted to be supplied with electricity off the mains.
- An apparatus for obtaining a percutaneous and digital blood sample from a human finger in conjunction with a blood collector device comprising a tube in the mouth of which is fitted a resilient funnel member fitted with at least one incisor lancet directed towards the openend of the funnel member, said apparatus comprising a housing mounting in said housing, said mounting formed with a through passage in which a tube can be removably inserted, said through passage having a predetermined length and a top and bottom opening; a striker mechanism mounted in said housing and having a releasable striking member facing the bottom opening of said through passage, means for releasing said striking member to propel it toward said bottom opening, said striker member adapted to strike, when released, the inner end portion of a tube, in said through passage, thereby to tend to propel a tube out of said through passage; a clamping means mounted onsaid housing and adapted to clamp a finger onsaid housing in line with said top opening of said through passage and means for'periodically varying the clamping action of said clamping means where
- said clamping means comprises a' supporting block adapted to support a human finger and a movable shackle adapted to be applied on to the part of a finger opposite to that which is meant to lie on said block, a lever, a motor, an eccentric on said motor, said lever drivingly connected at its one end to said motor through the intermediary of said eccentric and connected at its opposite end to said block, wherein said motor is adapted to rotate in a direction such that said block may be caused to move from the back of a finger towards the front thereof while at the same time compressing the tissues of the finger, and wherein the plane in which the eccentric motion of the blockcarrying lever takes place contains the axis of said through passage, the relative positions of said through passage and of said block being such that the bottom opening of said through passage opens in a means plane substantially equidistant from points, along the eccentric path followed by the block, respect'ively corresponding to maximum and minimum compression of the finger tissues when a finger is placed on said apparatus.
- said shackle comprises a lever which is mounted for pivotal movement in said housing in the plane of eccentric motion of said blockcarrying lever and at a location opposite to that occupied by said block in relation to said through passage, said shackle being movable between a first extreme position in which it is adapted to be applied to a finger and a second extreme position which is sufficiently far removed from the first to provide free access to said block and to the funnel member of a blood collector device when inserted in said through passage, said apparatus further comprising a means for locking said shackle in said first extreme position and a return member for moving said shackle away from said first position upon being released from the action of said locking means.
- Apparatus as claimed in claim 3 including first and second switches and an element on said shackle wherein said motor is supplied with current through at least said first switch adapted to be closed by said element carried by said shackle when said shackle is moved towards said first extreme position, and through at least said second switch controlled by an element adapted to be actuated by a blood collector device when inserted in said through passage to close said second switch.
- said mounting lies between said block and the pivotal axis of said shackle and is formed with a pair of limbs
- said striking member includes a rocking lever which extends between said limbs, which is pivotally mounted to the side of said mounting furthest from the pivotal axis of said shackle, and which has a projecting free end portion to the side of said mounting nearest the pivotal axis of said shackle, a spring means, said rocking lever freely resting in an inoperative position on a support which is subjected to the action of said spring means tending to return said lever to said inoperative position when it has been moved away therefrom in the direction of the base of said limbs, and wherein the striking lever has a length such that, upon being rocked, the path traveled by the tip of its free end portion may intersect the circular path traveled by an actuating member associated with said shackle when said shackle is about to reach said first extreme position, so that, upon said
- said finger holder comprises a stationary block for supporting the fleshy part of a finger, and a U-shaped shackle having limbs straddling said block on opposite sides thereof and a transverse portion adapted to engage the topside of a finger, said shackle being movable in a plane which is parallel to its limbs and which contains the axis of said through passage, a motor and eccentric and said shackle being drivingly connected to said motor through the intermediary of said eccentric underneath said block whereby it may exert on a finger a pressure during that part of its motion when said eccentric moves away from block and to relax said pressure when said eccentric moves toward said block, the direction of rotation of said motor being such that said shackle is caused to move from the back of a finger towards the front during that part of its motion when it exerts on a finger a compression.
- said clamping means comprises a finger-supporting block and a movable shackle adapted to be applied onto the part of a finger opposite to that which is meant to lie on said block, a motor mounted in said housing and an eccentric, a lever drivingly connected at its opposite end to said motor through said eccentric, said block being mounted on one end of said lever wherein said motor is adapted to rotate in a direction such that said block is caused to move from the back of a finger clamped in said clamping means towards the front thereof while at the same time compressing the tissues of the finger, and wherein the plane in which the eccentric motion of the block-carrying lever takes place contains the axis of a tube when it is in the said through passage, the relative positions of a tube and of said block when a tube is in said mounting means being such that the rear portion of the tube is adapted to open in a mean plane substantially equidistant from points, along the eccentric path followed by the block, respectively corresponding to maximum and minimum compression of the finger
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Hematology (AREA)
- Physics & Mathematics (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dermatology (AREA)
- Pain & Pain Management (AREA)
- Vascular Medicine (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1127268A CH500707A (fr) | 1968-07-26 | 1968-07-26 | Dispositif pour effectuer une prise de sang percutanée et digitale |
Publications (1)
Publication Number | Publication Date |
---|---|
US3626929A true US3626929A (en) | 1971-12-14 |
Family
ID=4371844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US843016A Expired - Lifetime US3626929A (en) | 1968-07-26 | 1969-07-18 | Apparatus for obtaining a percutaneous and digital blood sample |
Country Status (12)
Country | Link |
---|---|
US (1) | US3626929A (xx) |
JP (2) | JPS4841632B1 (xx) |
AT (2) | AT292910B (xx) |
BE (2) | BE736573A (xx) |
CH (1) | CH500707A (xx) |
DE (2) | DE1938870C3 (xx) |
DK (2) | DK125730B (xx) |
FR (2) | FR2014735A1 (xx) |
GB (2) | GB1277761A (xx) |
IL (2) | IL32706A (xx) |
NL (2) | NL6909366A (xx) |
SE (2) | SE348932B (xx) |
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Also Published As
Publication number | Publication date |
---|---|
IL32707A (en) | 1972-10-29 |
FR2014735A1 (xx) | 1970-04-17 |
IL32706A (en) | 1972-10-29 |
DE1938871A1 (de) | 1970-02-05 |
JPS4841633B1 (xx) | 1973-12-07 |
FR2013819A1 (xx) | 1970-04-10 |
BE736571A (xx) | 1970-01-26 |
GB1277761A (en) | 1972-06-14 |
DK125730B (da) | 1973-04-30 |
BE736573A (xx) | 1970-01-26 |
AT292911B (de) | 1971-09-10 |
IL32706A0 (en) | 1969-09-25 |
DK120714B (da) | 1971-07-05 |
AT292910B (de) | 1971-09-10 |
NL6909366A (xx) | 1970-01-29 |
IL32707A0 (en) | 1969-09-25 |
DE1938871C3 (de) | 1973-09-20 |
SE348932B (xx) | 1972-09-18 |
DE1938870B2 (de) | 1973-03-01 |
JPS4841632B1 (xx) | 1973-12-07 |
DE1938870A1 (de) | 1970-01-29 |
SE348931B (xx) | 1972-09-18 |
GB1277762A (en) | 1972-06-14 |
CH500707A (fr) | 1970-12-31 |
NL6911527A (xx) | 1970-01-28 |
DE1938871B2 (de) | 1973-02-22 |
DE1938870C3 (de) | 1973-09-20 |
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