WO1987004064A1 - Ejector for an automatic lancet arm - Google Patents

Ejector for an automatic lancet arm Download PDF

Info

Publication number
WO1987004064A1
WO1987004064A1 PCT/US1986/000305 US8600305W WO8704064A1 WO 1987004064 A1 WO1987004064 A1 WO 1987004064A1 US 8600305 W US8600305 W US 8600305W WO 8704064 A1 WO8704064 A1 WO 8704064A1
Authority
WO
WIPO (PCT)
Prior art keywords
holder
plunger
needle
arm
automatic lancet
Prior art date
Application number
PCT/US1986/000305
Other languages
French (fr)
Inventor
Daniel J. Chiodo
Joseph A. Maggio
Original Assignee
Packaging Corporation International
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 Packaging Corporation International filed Critical Packaging Corporation International
Publication of WO1987004064A1 publication Critical patent/WO1987004064A1/en

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
    • A61B5/15186—Devices loaded with a single lancet, i.e. a single lancet with or without a casing is loaded into a reusable drive device and then discarded after use; drive devices reloadable for multiple use
    • A61B5/15188—Constructional features of reusable driving devices
    • A61B5/1519—Constructional features of reusable driving devices comprising driving means, e.g. a spring, for propelling the piercing unit
    • 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
    • A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
    • A61B5/150541—Breakable protectors, e.g. caps, shields or sleeves, i.e. protectors separated destructively, e.g. by breaking a connecting area
    • 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
    • A61B5/15058—Joining techniques used for protective means
    • A61B5/150618—Integrally moulded protectors, e.g. protectors simultaneously moulded together with a further component, e.g. a hub, of the piercing element
    • 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
    • A61B5/151—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

Definitions

  • the present invention relates to an improvement of a medical instrument known as an automatic lancet.
  • the automatic lancet has a spring loaded small needle used to prick the finger to obtain a blood sample.
  • U.S. Pat. No. 4,230,118 to Holman, et al. has be ⁇ come a generally accepted medical instrument used to prick the finger to obtain a blood sample.
  • a housing contains a spring loaded pivoting arm which has a cylin ⁇ drical holder at its operating end. The holder holds a small needle which is housed in a plastic carrier. Push ⁇ ing a trigger releases the arm holding the needle. The needle pricks the finger from which the blood sample is taken. Presently the user must grab the exposed sharp needle and its surrounding carrier and pull the used needle out of the holder before inserting a new needle.
  • the primary object of the present invention to provide an improvement to the automatic lancet whereby the addition of a plunger inside the needle holder allows the medical technician to remove a used needle from the holder by pushing the plunger, thus avoiding any con ⁇ tact with the used needle.
  • Figure 2 is a front elevational view of the automatic lancet showing the improved lancet holder having a plunger.
  • Figure 3 is a partial top plan view of the automatic lancet taken along line 3 - 3 of Figure 1 showing the 15 pivoting arm.
  • Figure 4 is a fragmentary sectional view of the pi ⁇ voting arm taken along line 4 -4 of Figure 3.
  • Figure 5 is a partial bottom plan view of the automa ⁇ tic lancet taken along line 5 - 5 of Figure 4 showing 2-0 the pivoting arm.
  • Figure 6 is a top perspective view of a lancet needle shown in dotted lines still encased in a protective tip.
  • Figure 7 is a left side elevational view of the automatic lancet cocked and ready to be actuated.
  • 5- Figure 8 is a left side fragmentary sectional view of the automatic lancet showing the lancet needle in its carrier snugly fit against the plunger.
  • Figure 9 is a left side elevational view of the auto ⁇ matic lancet with a fragmentary sectional view of the 0 lancet holder during ejection.
  • automatic lancet 1 is comprised of a housing having parts 2A and 2B.
  • detachable finger rest 3 is placed on top of the patient's finger (not shown).
  • Pivot arm 7 is cocked back to the position shown in dotted lines.
  • Trigger 5 is pressed to release pivot arm 7 fbrcs ⁇ ully against stopper 8.
  • Pivot arm 7 slides in groove 6.
  • Spring 9 supplies the pivoting force to pivot arm 7 when couplings 10A and 10B are uncoupled by depression of trigger 5.
  • the action end of pivot arm 7 is comprised of holder 4.
  • the present inven ⁇ tion is comprised solely of plunger 11 inside holder 4, and the modification of holder 4 to include a hole on top for the plunger 11.
  • FIG 2 shows the pivot arm 7 in a neutral position midway along groove 6. After cocking and upon actuation of trigger 5, the base 21 of pivot arm 7 slams into stopper 8. Arm 7 then retracts slightly to the neutral position.
  • Holder 4 has a center groove 20 which expands to hold the needle (see Figures 7, 8 and 9).
  • the top 25 of holder 4 is contoured inward providing an inside collar in holder 4 (see Figure 4) .
  • Plunger 11 has a matching flange 22 which prevents plunger 11 from falling out of holder 4. Outer flange 23 on plunger 11 prevents plunger 11 from falling through holder 4.
  • Figure 3 shows how outer flange 23 on plunger 11 rests against the top 25 of holder 4.
  • Figure 4 shows how holder 4 lines up with hole 40 in finger rest 3.
  • Figure 8 shows how the lancet needle fits in arm 7.
  • Flange 22 abuts against holder top 25 and plunger 11 is thereby held slidingly engaged within holder 4.
  • Flange 22 slidingly engages the cylindrical center 90 of holder 4.
  • Figure 5 shows the bottom of plunger 11 held inside holder 4.
  • Figure 6 shows needle 61 in dotted lines encased in protective tip 62.
  • Protective tip 62 is twisted off before use.
  • Ribbed carrier 60 securely holds needle 61.
  • Figure 7 shows needle assembly 60, 61 and 62 mounted in operating position inside holder 4. Pivot arm 7 is in the cocked position whereby depressing trigger 5 would propel needle 61 through hole 40 into a patient's finger (not shown) .
  • Figure 8 shows how holder 4 has a hole 80 on top which guides plunger 11.
  • Plunger flange 22 also guides plunger 11 down the cylindrical center 90 of holder 4 when plunger 11 is depressed in order to eject needle assembly 60, 61.
  • Ribbed carrier 60 fits securely inside the cylin ⁇ drical center 90 of holder 4 during operation.
  • Figure 9 shows a medical technician's finger F depress ⁇ ing plunger 11 thereby ejecting needle assembly 60, 61 through hole 40 in finger rest 3.
  • pivot arm 7 would normally be in the neutral position after use as shown.
  • the medical technician is protected from acci ⁇ dental pricking during insertion of a new needle assembly 60, 61, 62 because protective tip 62 is still in place (not shown) .

Abstract

Improvement on the pivoting arm (7) of an automatic lancet (1). Generally an automatic lancet (1) is comprised of a housing (2A and 2B) having a spring loaded pivoting arm (7). The arm has a cylindrical holder (4) at the operating end which holds a needle (61) encased in a plastic carrier (60). Upon releasing the spring (9), the needle (61) pierces the patient's finger producing a blood sample. To replace the needle (61) generally requires pulling the old needle out with one's fingers and pushing a new one in. The present invention improves the cylindrical holder (4) by adding a plunger (11) inside it. This enables the user to push the old needle (61) out without the necessity of grabbing or touching the old needle. Thus, safety for the medical technician is greatly enhanced.

Description

EJECTOR FOR AN AUTOMATIC LANCET ARM TECHNICAL FIELD
The present invention relates to an improvement of a medical instrument known as an automatic lancet. The automatic lancet has a spring loaded small needle used to prick the finger to obtain a blood sample. BACKGROUND OF THE INVENTION
U.S. Pat. No. 4,230,118 to Holman, et al. has be¬ come a generally accepted medical instrument used to prick the finger to obtain a blood sample. A housing contains a spring loaded pivoting arm which has a cylin¬ drical holder at its operating end. The holder holds a small needle which is housed in a plastic carrier. Push¬ ing a trigger releases the arm holding the needle. The needle pricks the finger from which the blood sample is taken. Presently the user must grab the exposed sharp needle and its surrounding carrier and pull the used needle out of the holder before inserting a new needle. This procedure poses the risk of having the medical tec ni- cian accidentally pricking his fingers on the used needle thus introducing the patient's blood directly into his own blood stream. This direct introductionof a patient's blood into the medical technician's blood poses serious health hazards to the medical technicians. SUMMARY OF THE INVENTION
It is, therefore, the primary object of the present invention to provide an improvement to the automatic lancet whereby the addition of a plunger inside the needle holder allows the medical technician to remove a used needle from the holder by pushing the plunger, thus avoiding any con¬ tact with the used needle.
Other objects of this invention will appear from the following description and appended claims, reference being 5s had to the accompanying drawings forming a part of this specification wherein like reference characters designate corresponding parts in the several views. BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a left side elevational view partially i0= cut away showing the working parts of the automatic lancet.
Figure 2 is a front elevational view of the automatic lancet showing the improved lancet holder having a plunger.
Figure 3 is a partial top plan view of the automatic lancet taken along line 3 - 3 of Figure 1 showing the 15 pivoting arm.
Figure 4 is a fragmentary sectional view of the pi¬ voting arm taken along line 4 -4 of Figure 3.
Figure 5 is a partial bottom plan view of the automa¬ tic lancet taken along line 5 - 5 of Figure 4 showing 2-0 the pivoting arm.
Figure 6 is a top perspective view of a lancet needle shown in dotted lines still encased in a protective tip.
Figure 7 is a left side elevational view of the automatic lancet cocked and ready to be actuated. ,5- Figure 8 is a left side fragmentary sectional view of the automatic lancet showing the lancet needle in its carrier snugly fit against the plunger.
Figure 9 is a left side elevational view of the auto¬ matic lancet with a fragmentary sectional view of the 0 lancet holder during ejection.
Before explaining the disclosed embodiment of the present invention in detail, it is to be understood that the invention is not limited in its application to the de¬ tails of the particular arrangement shown, since the inven- 5 tion is capable of other embodiments. Also, the terminology used herein is for the purpose of description and not of limitation. DETAILED DESCRIPTION OF THE DRAWINGS
Referring first to Figure 1, automatic lancet 1 is comprised of a housing having parts 2A and 2B. In opera¬ tion, detachable finger rest 3 is placed on top of the patient's finger (not shown). Pivot arm 7 is cocked back to the position shown in dotted lines. Trigger 5 is pressed to release pivot arm 7 fbrcsεully against stopper 8. Pivot arm 7 slides in groove 6. Spring 9 supplies the pivoting force to pivot arm 7 when couplings 10A and 10B are uncoupled by depression of trigger 5. The action end of pivot arm 7 is comprised of holder 4. The present inven¬ tion is comprised solely of plunger 11 inside holder 4, and the modification of holder 4 to include a hole on top for the plunger 11. Figure 2 shows the pivot arm 7 in a neutral position midway along groove 6. After cocking and upon actuation of trigger 5, the base 21 of pivot arm 7 slams into stopper 8. Arm 7 then retracts slightly to the neutral position. Holder 4 has a center groove 20 which expands to hold the needle (see Figures 7, 8 and 9). The top 25 of holder 4 is contoured inward providing an inside collar in holder 4 (see Figure 4) . Plunger 11 has a matching flange 22 which prevents plunger 11 from falling out of holder 4. Outer flange 23 on plunger 11 prevents plunger 11 from falling through holder 4.
Figure 3 shows how outer flange 23 on plunger 11 rests against the top 25 of holder 4.
Figure 4 shows how holder 4 lines up with hole 40 in finger rest 3. Figure 8 shows how the lancet needle fits in arm 7. Flange 22 abuts against holder top 25 and plunger 11 is thereby held slidingly engaged within holder 4. Flange 22 slidingly engages the cylindrical center 90 of holder 4.
Figure 5 shows the bottom of plunger 11 held inside holder 4.
Figure 6 shows needle 61 in dotted lines encased in protective tip 62. Protective tip 62 is twisted off before use. Ribbed carrier 60 securely holds needle 61.
Figure 7 shows needle assembly 60, 61 and 62 mounted in operating position inside holder 4. Pivot arm 7 is in the cocked position whereby depressing trigger 5 would propel needle 61 through hole 40 into a patient's finger (not shown) .
Figure 8 shows how holder 4 has a hole 80 on top which guides plunger 11. Plunger flange 22 also guides plunger 11 down the cylindrical center 90 of holder 4 when plunger 11 is depressed in order to eject needle assembly 60, 61. Ribbed carrier 60 fits securely inside the cylin¬ drical center 90 of holder 4 during operation.
Figure 9 shows a medical technician's finger F depress¬ ing plunger 11 thereby ejecting needle assembly 60, 61 through hole 40 in finger rest 3. During ejection, pivot arm 7 would normally be in the neutral position after use as shown. The medical technician is protected from acci¬ dental pricking during insertion of a new needle assembly 60, 61, 62 because protective tip 62 is still in place (not shown) .

Claims

-5- Σ CLAIM:
1. In an automatic lancet device comprising: a movable arm pivoted in a housing for rotation through a limited angle and having at one 5. end remote from its pivot a holder adapted to receive a replaceable mounted needle and to hold the needle by its mounting point¬ ing in the tangential direction, spring means acting on the arm to bias it for _J3 rotary movement about its pivot from a re¬ tracted position into an operative position with the point of the needle exposed and projecting forwardly for pricking, and releaseable latch means for holding the arm 15 and its needle in the retracted position against the force of the spring means, whereby on release of the latch by means of a manuallyCoperable trigger the arm will be urged forwardly by the spring means to¬ la wards its operative position to perform a pricking operation, the improvements com¬ prising: an ejection plunger for said replaceable mounted needle slidingly engaged inside said holder 25. . wherein said plunger comprises a cylindrical shaft having means to hold said plunger in¬ side said holder, and a protrusion beyond the top of said holder, whereby depressing said plunger on said protrusion ejects said 10 replaceable mounted needle from said holder.
2. The automatic lancet device of claim 1 wherein said holder further comprises a cylindrical interior and a hole at both ends of said cylindrical interior thereby enabling said plunger to slidingly move within said holder.
3. The automatic lancet device of claim 2 whereby said means to hold said plunger inside said holder com¬ prise a narrowed constricting top on said holder which engages a matching flange on the bottom of said plunger thereby preventing said plunger from being pulled out of the top of said holder, and a flange on top of said plunger extending wider than said hole at one end of said cylin¬ drical holder thereby preventing said plunger from being pushed out the bottom of said holder.
PCT/US1986/000305 1986-01-08 1986-02-14 Ejector for an automatic lancet arm WO1987004064A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US81707986A 1986-01-08 1986-01-08
US817,079 1986-01-08

Publications (1)

Publication Number Publication Date
WO1987004064A1 true WO1987004064A1 (en) 1987-07-16

Family

ID=25222302

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1986/000305 WO1987004064A1 (en) 1986-01-08 1986-02-14 Ejector for an automatic lancet arm

Country Status (4)

Country Link
EP (1) EP0263812A4 (en)
AU (1) AU5513486A (en)
CA (1) CA1266595A (en)
WO (1) WO1987004064A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE869846C (en) * 1951-09-01 1953-03-09 Herbert Dr Mollen Schnepper
US4230118A (en) * 1977-08-05 1980-10-28 Holman Rury R Automatic lancet

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3030959A (en) * 1959-09-04 1962-04-24 Praemeta Surgical lancet for blood sampling
DE2131297A1 (en) * 1971-06-24 1973-01-11 Richard Philipp LOOKING APPARATUS FOR BLOOD COLLECTION

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE869846C (en) * 1951-09-01 1953-03-09 Herbert Dr Mollen Schnepper
US4230118A (en) * 1977-08-05 1980-10-28 Holman Rury R Automatic lancet

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0263812A4 *

Also Published As

Publication number Publication date
EP0263812A1 (en) 1988-04-20
AU5513486A (en) 1987-07-28
CA1266595A (en) 1990-03-13
EP0263812A4 (en) 1988-08-24

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