WO2011084103A1 - Lancette - Google Patents

Lancette Download PDF

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Publication number
WO2011084103A1
WO2011084103A1 PCT/SG2010/000001 SG2010000001W WO2011084103A1 WO 2011084103 A1 WO2011084103 A1 WO 2011084103A1 SG 2010000001 W SG2010000001 W SG 2010000001W WO 2011084103 A1 WO2011084103 A1 WO 2011084103A1
Authority
WO
WIPO (PCT)
Prior art keywords
holder
housing
slider
lancet
aperture
Prior art date
Application number
PCT/SG2010/000001
Other languages
English (en)
Inventor
Nakka Raghavender Rao
Hsien Kuan Tcheng
Original Assignee
Mi Technologies Pte. Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mi Technologies Pte. Ltd. filed Critical Mi Technologies Pte. Ltd.
Priority to PCT/SG2010/000001 priority Critical patent/WO2011084103A1/fr
Publication of WO2011084103A1 publication Critical patent/WO2011084103A1/fr

Links

Classifications

    • 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
    • A61B5/15142—Devices intended for single use, i.e. disposable
    • A61B5/15144—Devices intended for single use, i.e. disposable comprising driving means, e.g. a spring, for retracting the piercing unit into the housing
    • 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
    • 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
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150381—Design of piercing elements
    • A61B5/150503—Single-ended needles
    • A61B5/150519—Details of construction of hub, i.e. element used to attach the single-ended needle to a piercing device or sampling device
    • 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
    • A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
    • A61B5/150694—Procedure for removing protection means at the time of piercing
    • A61B5/150717—Procedure for removing protection means at the time of piercing manually removed
    • 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
    • A61B5/150885—Preventing re-use
    • A61B5/150916—Preventing re-use by blocking components, e.g. piston, driving device or fluid passageway
    • 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
    • A61B5/15111—Semi-automatically triggered, e.g. at the end of the cocking procedure, for instance by biasing the main drive spring or when reaching sufficient contact pressure, the piercing device is automatically triggered without any deliberate action by the user
    • 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
    • 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
    • A61B5/15126—Means for controlling the lancing movement, e.g. 2D- or 3D-shaped elements, tooth-shaped elements or sliding guides
    • A61B5/1513—Means for controlling the lancing movement, e.g. 2D- or 3D-shaped elements, tooth-shaped elements or sliding guides comprising linear sliding guides

Definitions

  • This invention relates to a lancet for puncturing skin tissue. More particularly, this invention relates to a lancet for one-time use. Still more particularly, this invention relates to a lancet for one-time use that is primed at the time of use and includes safety features for preventing a puncturing mechanism from being exposed except during use.
  • Lancets and other pricking devices are commonly used in medical procedures to create a puncture or incision in skin tissue to withdraw a sample of blood or other bodily fluid. Lancets are typically manufactured for either one-time use or multiple uses. As the understanding of communicable diseases has increased, the medical community has come to favour the single-use safety lancet to prevent the spread of communicable diseases from residual bodily fluids remaining on a previously used lancet and to avoid accidental injuries caused by exposed needles.
  • the lancet will include a needle or other puncturing element inside a housing.
  • a coil mechanism inside the housing cooperates with the puncturing element to force the needle through an opening in the housing when triggered.
  • the needle retracts into the housing after use.
  • the lancet then has a safety mechanism for preventing the needle from protruding out of the opening after use for safe handling and disposal of the lancet.
  • the one-time use safety lancets typically include one of two types of trigger mechanisms.
  • the first type of trigger mechanism requires a user to charge, prime, or compress the coil mechanism prior to use. The user then performs a second action to cause the compressed coil mechanism to release the energy stored and force the needle though the opening.
  • the second type of mechanism includes a compressed coil mechanism that is released when the user performs a triggering action.
  • the first type of triggering mechanism is unsatisfactory for several reasons.
  • One reason is that the arming and triggering of the lancet is cumbersome to execute. The arming and triggering often require small finger movements.
  • a second reason is that, in some designs, the user must force the coil mechanism backwards before initiating a forward motion of the needle. If not done in the proper manner, the forcing of the coil mechanism may damage internal components of the lancet causing the lancet to trigger prematurely. Additionally, in this type of triggering mechanism, it is often difficult to disable the triggering mechanism to prevent multiple use.
  • the second type of triggering mechanism is also unsatisfactory for several reasons.
  • this second type is typically manufactured with a fully compressed coil mechanism making the likelihood of premature discharge of the coil greater.
  • Manufacturing a lancet with this type of mechanism is difficult as the coil must be placed in the housing in a compressed state.
  • the lancet must be placed in suitable packaging to maintain this primed state of use. This increases the cost of assembly, packaging, and transportation significantly.
  • a first advantage of a lancet in accordance with this invention is that the action triggering the device also primes and releases the coil mechanism. This facilitates easy assembly and prevents premature firing of the needle.
  • a second advantage of a lancet in accordance with this invention is that the priming and firing of the lancet are performed in one movement by the user. This reduces the number of parts needed to produce the lancet and makes the use of the lancet easier and quicker.
  • a third advantage of a lancet in accordance with this invention is that the lancet does not require priming during assembly. Thus, manufacturing, packaging, and transportation costs are reduced.
  • a lancet is configured in the following manner.
  • a lancet for one time use and safe disposal has a housing with a first end, and a second end. An opening is defined through the first end of the housing.
  • a holder is positioned inside the housing with a front end proximate to the opening and a back end proximate to the interior of the second end of the housing.
  • a puncturing element extends from the front end of the holder.
  • a coil element is situated in the housing between the back end of the holder and the interior of the second end of the housing.
  • a slider having first and second ends fits securely into the opening of the housing to allow the holder to fit into a cavity formed by the slider and the housing.
  • the slider includes an aperture through the first end that is configured to allow the puncturing element to protrude through the slider.
  • a resilient element sits inside the slider between the first end of the slider and the front end of the holder in a biased state to prevent the puncturing element from protruding out of the opening of the first end of the slider.
  • a first locking element holds the holder in position within the cavity.
  • the holder secures the coil element in place between the holder and interior of the housing with insufficient energy to push the holder towards the aperture.
  • a first release element causes the first locking element to release the holder in response to the slider moving into the housing.
  • the holder is configured to then move back into the housing with the slider compressing the coil element to cause the coil element to have sufficient energy to push the holder towards the aperture of the slider as well as overcome the bias of the resilient element to cause the puncturing element to protrude through the aperture with sufficient force to puncture skin tissue and impart energy to the resilient element.
  • the resilient element is configured to expend the imparted energy to return to its biased state.
  • a lancet may further include a second locking element that holds the slider in a locked position in the housing in response to the first locking element releasing the holder.
  • the second locking element may have a tab and slot arrangement between the slider and the housing.
  • the lancet may have a slot and rail arrangement between the slider and the housing to guide movement of the slider into the housing.
  • a lancet may include a cover that removably attaches to the first end of the slider covering the aperture.
  • the holder may have a nib predisposed at the back end of the holder to receive the coil element.
  • the holder may have a protrusion that receives the coil element.
  • the holder may have an undercut defined in the nib which engages the coil element to the holder.
  • the first locking element may have a first incline slidably engaged with a second incline defining the path of first release element in the housing that causes the holder to be released as the first incline slides along the second incline.
  • a lancet may have a stopper that prevents movement of the slider further into the housing responsive to the holder being released.
  • the first release element includes the stopper.
  • the housing of the lancet includes a void inside the housing that receives the coil element.
  • an abutment on the interior of the second end of the housing receives the coil element in the housing.
  • the resilient element may be a flexible member extending from the front end of the holder.
  • the resilient member may be a plurality of flexible members extending from the front end of the holder.
  • the puncturing element is integral to the holder.
  • the puncturing element is press fit into the holder.
  • the holder is injection moulded around the puncturing element.
  • a lancet is configured in the following manner.
  • a lancet for one time use and safe disposal has a housing with a first end, and a second end. An opening is defined through the first end of the housing.
  • a holder is inside the housing with a front end proximate to the opening and a back end proximate to the interior the second end of the housing.
  • a puncturing element extends from the front end of the holder.
  • a coil element is situated in the housing between the back end of the holder and the interior of the second end of the housing.
  • a slider having first and second ends fits securely into the opening of the housing to allow the holder to fit into a cavity formed by the slider and the housing.
  • the slider includes an aperture through the first end that is configured to allow the puncturing element to protrude through the slider.
  • a resilient element sits inside the slider between the first end of the slider and the front end of the holder in a biased state to prevent the puncturing element from protruding out of the opening of the first end of the slider.
  • a first locking element is configured to hold the holder in position within the cavity.
  • the holder secures the coil element between the holder and interior of the housing with insufficient energy to push the holder towards the aperture.
  • a priming element is configured to engage the holder to move the holder toward the second end of the housing to compress the coil element to store sufficient energy to push the holder towards the first end of the housing with sufficient force to overcome the resilient element.
  • a discharge element is configured to disengage the holder from the slider and cause the coil element to push the holder towards the aperture with enough energy to overcome the bias of the resilient element. This will cause the puncturing element to protrude through the aperture with sufficient force to puncture skin tissue and impart energy to the resilient element. The resilient element then being configured to expend the imparted energy to return to its biased state.
  • the priming element may have a projection with an incline and extends from the edge of the second end of the slider.
  • the discharge element of some embodiments may have an incline that slidably engages the incline of the priming element to cause the projection to release the holder from the slider.
  • a disposable lancet is used in the following the manner: a user places a first end of a slider having an aperture proximate skin tissue, and pushes down on the lancet. The force from the pushing causes the slider to move into the housing. As the slider moves inward in the housing, the slider engages a holder inside the housing.
  • the holder having a front end proximate to the opening and a back end proximate to the interior of a second end of the housing with the slider.
  • the slider then pushes the holder towards the second end of the housing .
  • the holder is engaged with a coil element inside the housing between the back end of the holder and the interior of the second end of the housing. Prior to use, the coil element stores insufficient energy to push the holder towards the aperture.
  • the holder moving towards the second end of the housing imparts sufficient energy to the coil element to: push the holder towards the aperture of the slider, overcome a bias state of a resilient element, and cause the puncturing element to protrude through the aperture with sufficient force to puncture skin tissue.
  • the holder is then released from the slider in the housing.
  • the coil element then discharges the stored energy when the holder is released pushing the holder towards the first end of the housing .
  • the energy discharged by the coil element is sufficient to overcome the biased state of the resilient element pushing the puncture element through the aperture of the slider with sufficient force to puncture the skin tissue.
  • the resilient element then expends the imparted energy to return to its biased state and prevents the puncture element from extending out of the aperture.
  • the slider is held in a locked position inside the housing in response to the releasing of the holder.
  • the locking may be performed by a tab extending from a first one of the slider and the holder inserting into a tab defined in a second one of the slider and the holder.
  • the movement of the slider into the housing may be guided by a rail on the second one of the slider and the holder that receives the tab.
  • the step of overcoming the biased state may be performed by flexing a projection extending from edge of the second end of the slider as the projection contacts the interior of the first end of the slider. Furthermore, in accordance with these embodiments, the projection returns to the biased state by allowing the projection to reflex to the biased state .
  • the step for overcoming the biased state may be performed by flexing multiple projections extending from edge of the second end of the slider as the plurality of projections contact the interior of the first end of the slider. Furthermore in accordance with these the projections return to the biased state by allowing the projections to reflex to the biased state, in response to the flexing.
  • FIGS. 1A and 1 B illustrating a perspective view of embodiments of a lancet in accordance with this invention
  • FIG. 2 illustrating an exploded view of components of the embodiments shown in Figure 1 B of a lancet in accordance with this invention
  • FIG. 3 illustrating a perspective view of a housing from the embodiments shown in Figures 1A and 1B of a lancet in accordance with this invention
  • FIG. 4 illustrating a perspective view of a holder from the embodiments shown in Figures 1A and 1B of a lancet in accordance with this invention
  • FIG. 5A illustrating a perspective view of a slider from the embodiments shown in figure 1A and 1B of a lancet in accordance with this invention
  • Figure 5B illustrating close up view of a slider from the embodiments shown in Figure 1A and 1B of a lancet in accordance with this invention
  • FIG 10 illustrating a flow diagram of operation of the embodiments shown in Figure 1A and 1B of a lancet in accordance with invention.
  • This invention relates to a lancet for puncturing skin tissue. More particularly, this invention relates to a lancet for one-time use. Still more particularly, this invention relates to a lancet for one-time use that is primed at the time of use and includes safety features for preventing a puncturing mechanism from being exposed except during use.
  • Figures 1-9 illustrate particular embodiments of a lancet in accordance with this invention. For clarity, a component shown in more than one figure has been given the same reference numeral in the different figures.
  • FIGS 1-9 illustrate various views of embodiments of a safety lancet 100 according to the invention.
  • safety lancet 100 includes slider 110 having an aperture 115 defined through a first end, and a housing 120 having an opening 125 defined through a first end.
  • a second end of slider 110 fits teiescopicaily within opening 125 of housing 120 and to allow slider 10 to move into the interior of housing 120.
  • Figure 1B shows the safety lancet 100 having a cap 155 to cover the aperture 1 5 when storing the safety lancet 100.
  • Fig. 2 shows an exploded view of the various components of safety lancet
  • Cap 55 removably fits over a housing 120 to cover exposed first end of slider 110.
  • Holder 210 resides inside cavity 215 formed by slider 110 and housing 120.
  • a puncturing element 410 is positioned in opening 470 (shown in Fig. 4) at first end of Holder 210 and at second end of holder 210 connects to coil element 220.
  • Coil element 220 is located within housing 120 between the second end of holder 210 and an interior side of the second end of housing 120.
  • Coil element 220 is situated substantially along a longitudinal axis of housing 120 within cavity 215.
  • Coil element 220 is any apparatus that can store potential energy and release the energy as kinetic energy to move holder 210 within cavity 215.
  • coil element 220 is a spring.
  • coil element 220 may be any other component with elastic qualities in accordance with the shown embodiment.
  • provision can be made within housing 120 for ensuring that the coil element is aligned substantially along the longitudinal axis of housing 120 by internal walls defining a void and/or abutment 605 on the interior wall of the second end of housing 120 (as shown in Figures 6-9) that secures coil element 220 in position, for engagement with the holder 210 during manufacture.
  • Fig. 3 shows an isolated view of housing 120.
  • the interior of housing 120 is shown through opening 125.
  • the interior of housing 120 includes rails 310.
  • Rails 310 define a trough along the internal walls of the housing 120. The troughs receive a guide extending from opposing side of slider 110, to guide the movement of the holder 210 and/or the slider 110.
  • Guide slot 320 is an opening through a sidewall of housing 110 that receives tab 510 (shown in Figure 5A) extending outward from an adjacent side wall of slider 110 that allows slider 110 to move a specific amount into housing 120.
  • Lock slot 330 is a opening at the end of guide slot 320 configured to receive tab 510 and securely hold tab 510 in place to lock slider 1 0 in a position within housing 120 after lancet 100 has been used.
  • the tab 510 can have a projection with a radius curve (shown in Figure 5B) which assists the guide slot in securely holding the tab in place after lancet 100 has been used.
  • Housing 120 is typically molded from plastic or other synthetic material. The exact material used for housing 120 is left as a design choice to those skilled in the art to meet the particular needs of a lancet made in accordance with this invention.
  • Fig. 4 illustrates holder 210.
  • Puncturing element 410 extends substantially along the central axis of holder 210 and has a point or sharp end extending out of the first end of holder 210. Puncturing element 410 is used to prick or form an incision in skin tissue placed proximate aperture 115 of slider 110. As shown, puncturing element 410 is a metallic needle. However, one skilled in the art will recognize that other components made of rigid materials and being able to prick or make an incision in skin tissue may be used. Puncturing element 410 is fitted into opening 470 of holder 210 during the manufacturing process. It is envisioned that the puncturing element 410 may either be press fit into holder 210 or holder 210 may be injection moulded around puncturing element 410.
  • Resilient elements 420, 421 are shown extending from a top end of holder 210. Resilient elements 420, 421 are preferably situated between an interior of the first end of slider 110 and the first end of holder 210. Resilient elements 420,421 are configured in a biased state to prevent puncturing element 410 from protruding out of aperture 115 of slider 1 0. As shown, resilient elements 420, 421 extend outward away from the first end of holder 210. Resilient elements 420, 421 are made of flexible material such as plastic or rubber; and flex from a relaxed, biased, extended state into a compressed state along the face of the holder 210.
  • resilient elements 420, 421 store enough potential energy to force holder 210 backwards into housing 120.
  • resilient elements 420, 421 any number of resilient elements may be incorporated into lancet 100 without departing from the invention.
  • Wings 450, 451 extend outwards from opposing sides of holder 210. Wings
  • Wings 450, 451 secure holder 210 against slider 110.
  • Wings 450, 451 are semi-rigid arms that allow the wings to flex.
  • Tabs 455, 456 extend outward from exterior sides of wings 450, 451 and rest upon edges 620, 621 (shown in Figures 6-9). The resting of tabs 455, 456 upon edges 620, 621 provides a locking mechanism holding holder 210 in place.
  • Holder 210 in turn holds coil element 220 between holder 210 and interior of the second end of housing 120 with insufficient energy to push holder 210 towards aperture 115.
  • Other locking mechanisms that only allow movement of holder 210 when slider 110 is forced into housing 120 may be used without departing from this invention.
  • Tabs 455, 456 have inclined edges that are configured to slide along mated, inclined edges 610, 611 in housing 120 when slider 110 pushes holder 210 towards the second end of housing 120 to provide a release mechanism in the following manner.
  • the movement of tabs 455, 456 along the inclined edges cause wings 450, 451 to flex inward.
  • the inward flexing dislodges wings 450, 451 from edges 620, 621.
  • the dislodging of wings 450, 451 then allows coil element 220 to release the stored energy, pushing holder 210 towards the first end of slider 110 as will be described below with regard to figures 6-10.
  • release mechanisms that release holder 210 when coil element 220 has been primed with sufficient energy may be used without departing from this invention.
  • Nib 435 extends from the second end of the holder 210 to engage the coil element 220.
  • Nib 435 may further include narrow protrusion 430 configured to fit inside nib 435.
  • Nib 435 is shown having undercut 440 which helps retain the coil element 220 on nib 435 and protrusion 430.
  • Fig. 5A illustrates slider 110 in accordance with the shown embodiment of the invention.
  • Aperture 115 is defined in first end 520 of slider 110.
  • Aperture 115 allows puncturing element 410 to protrude through aperture 115.
  • Locking tabs 510 protrude outward from opposing sides of slider 110.
  • Fig. 5B illustrates locking tab 510 with a curved radius to reduce friction between slider 110 and housing 120 walls during process 1010 and 1015 (shown in Fig. 10). Locking tabs 510 cooperate with slots 320 and 330 to allow slider 110 to move inward into housing 120 and to lock slider 110 in place in housing 120 after lancet 100 is used.
  • Second end 530 of slider 110 fits into opening 125 of housing 120 to form cavity 215.
  • Extensions 515 are defined in opposing side walls of slider 110 on sides adjacent to the sides from which locking tabs 510 extend. Open ends of extensions 515 provide edges 620, 621 that cooperate with wings 450, 451 of holder 210 to act as a locking mechanism prior to use and a priming mechanism during use.
  • edges 620, 621 that cooperate with wings 450, 451 of holder 210 to act as a locking mechanism prior to use and a priming mechanism during use.
  • slider 110 is preferably made of plastic, any other material may be used to make slider 110.
  • Fig. 6 to 9 illustrates cross sections of lancet 100 during use of lancet 100 as described by process 1000 shown in Fig. 10.
  • Fig. 6 shows lancet 100 ready for use, preferably after lancet 100 is removed from a sterilized packaging.
  • process 1000 begins in step 1005 by placing aperture 115 of the slider against skin tissue of a body part to be pricked or incised.
  • wings 450, 451 of holder 210 engage edges 620, 621 of slider 110 during step 1005 to secure holder 210 inside cavity 215.
  • step 1005 resilient element 420 of holder 210 is fully extended to prevent puncture element 410 from protruding through aperture 115 and coil element 220 is secured in place between holder 210 and the interior of the second end of the housing. At this point coil element 220 is not fully compressed and stores insufficient energy to push holder 210 towards slider 110 to overcome the resilient element 420.
  • step 1010 lancet 100 is pushed against the skin tissue.
  • the pushing of step 010 causes slider 110 to retract inward into housing 120, in step 1015.
  • the movement inwards of slider 110 forces holder 210 inwards by edges 620, 621 pushing on tabs 455, 456 in step 1020.
  • step 1025 the pushing back on holder 210 imparts energy to coil element 220.
  • edges 620, 621 cooperatively engage indentations 630, 631 in housing 120, to prevent edges 620, 621 from engaging incline edges 610, 611.
  • at least sufficient energy to push holder 210 forward with sufficient force to overcome resilient elements 420, 421 and cause puncture element 410 to puncture and/or incise the skin tissue to a depth that is dependent upon the use of lancet 100 is imparted to coil element 220.
  • Incline edges on tabs 455, 456 then slide along mated incline edges 610, 611 in housing 120 causing wings 450, 451 to flex and dislodge from edges 620, 621 releasing holder 210 to move in the opposite direction in step 1030.
  • Fig. 7 illustrates the configuration of lancet 100 after step 1030.
  • coil element 220 discharges the imparted energy onto the released holder 210.
  • Coil element 220 pushes the released holder 210 into slider 110 in step 1040.
  • step 1045 the force exerted on holder 210 by coil element 220 overcomes the bias state of resilient elements 420, 421 of the holder 210 in step 1045.
  • the overcoming of resilient element 420, 421 is accomplished by causing the resilient element to compress against the interior of the first end of slider 0. This imparts energy into resilient elements 420, 421.
  • holder 210 With the biased state of resilient elements 420, 421 overcome, holder 210 is pushed forward into slider 110 causing puncture element 410 to protrude through aperture 115 with sufficient force to puncture or incise the skin tissue to a depth that is determined by the use of the sample to be retrieved from the puncture in step 1050.
  • the configuration of lancet 100 at step 1050 is show in Figure 8.
  • resilient elements 420, 421 expend the retained energy to return to its biased state in step 1055. This retracts puncture element 410 into cavity 215 formed by slider 110 and housing 120.
  • resilient elements 420, 421 prevent holder 210 from moving in the direction of the first end of slider 110 to prevent puncture element 410 from subsequently protruding from aperture 115.
  • lock slots 330 and tabs 510 hold slider 110 in place to prevent slider 110 from being subsequently used to prime coil element 220.
  • Edges 620, 621 are prevented from engaging incline edges 610, 611 by the indentations 630, 631 in housing 120.
  • Process 1000 then ends.
  • Fig. 9 shows lancet 100 in a spent state preventing subsequent use of lancet 100 and maintaining the needle 410 in a safe position within the housing 120.

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  • Veterinary Medicine (AREA)
  • Dermatology (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

La présente invention a pour objet une lancette à usage unique pour piquer et/ou inciser le tissu cutané. La lancette comprend un curseur qui se rétracte à l'intérieur d'un logement pour comprimer un élément bobine à l'intérieur du logement. L'élément bobine pousse ensuite un élément de perforation à travers une ouverture dans le curseur pour piquer et/ou inciser le tissu cutané. Par la suite, un élément élastique agit pour rétracter l'élément de perforation à l'intérieur du logement et prévenir une autre exposition de l'élément de perforation à travers l'ouverture. Un mécanisme de verrouillage est également prévu pour fixer le curseur en place pour prévenir un armement ultérieur de la lancette.
PCT/SG2010/000001 2010-01-08 2010-01-08 Lancette WO2011084103A1 (fr)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016523627A (ja) * 2013-06-13 2016-08-12 エフ．ホフマン−ラ ロシュ アーゲーＦ． Ｈｏｆｆｍａｎｎ−Ｌａ Ｒｏｃｈｅ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ 体液採取要素
EP3261540A4 (fr) * 2015-02-24 2018-07-11 Facet Technologies, LLC Dispositif de lancette de compression à usage unique
WO2020245445A1 (fr) * 2019-06-05 2020-12-10 Owen Mumford Limited Dispositif autopiqueur
EP4278972A4 (fr) * 2021-01-12 2024-04-24 Roahmed Co Ltd Dispositif de prélèvement de sang de type à remplacement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6248120B1 (en) * 2000-01-10 2001-06-19 P. Z. “HTL” Spolka Akcyjna Puncturing device
WO2005020816A1 (fr) * 2003-08-29 2005-03-10 Owen Mumford Limited Perfectionnements relatifs a des lancettes
WO2005034753A1 (fr) * 2003-10-15 2005-04-21 Surgilance Pte Ltd Ensemble lancette
WO2006110742A2 (fr) * 2005-04-07 2006-10-19 Becton, Dickinson And Company Ensemble lancette

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6248120B1 (en) * 2000-01-10 2001-06-19 P. Z. “HTL” Spolka Akcyjna Puncturing device
WO2005020816A1 (fr) * 2003-08-29 2005-03-10 Owen Mumford Limited Perfectionnements relatifs a des lancettes
WO2005034753A1 (fr) * 2003-10-15 2005-04-21 Surgilance Pte Ltd Ensemble lancette
WO2006110742A2 (fr) * 2005-04-07 2006-10-19 Becton, Dickinson And Company Ensemble lancette

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016523627A (ja) * 2013-06-13 2016-08-12 エフ．ホフマン−ラ ロシュ アーゲーＦ． Ｈｏｆｆｍａｎｎ−Ｌａ Ｒｏｃｈｅ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ 体液採取要素
US10660556B2 (en) 2013-06-13 2020-05-26 Roche Diabetes Care, Inc. Body fluid sampling element
EP3261540A4 (fr) * 2015-02-24 2018-07-11 Facet Technologies, LLC Dispositif de lancette de compression à usage unique
WO2020245445A1 (fr) * 2019-06-05 2020-12-10 Owen Mumford Limited Dispositif autopiqueur
CN113993456A (zh) * 2019-06-05 2022-01-28 欧文蒙福德有限公司 采血装置
EP4302691A3 (fr) * 2019-06-05 2024-03-13 Owen Mumford Limited Dispositif autopiqueur
EP4278972A4 (fr) * 2021-01-12 2024-04-24 Roahmed Co Ltd Dispositif de prélèvement de sang de type à remplacement

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