US3789830A - Disposable lancet - Google Patents

Disposable lancet Download PDF

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Publication number
US3789830A
US3789830A US00182862A US3789830DA US3789830A US 3789830 A US3789830 A US 3789830A US 00182862 A US00182862 A US 00182862A US 3789830D A US3789830D A US 3789830DA US 3789830 A US3789830 A US 3789830A
Authority
US
United States
Prior art keywords
lancet
penetration
grip portion
piercing
penetration limiting
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US00182862A
Other languages
English (en)
Inventor
S Malmstrom
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SWEDISH HOSPITAL SUPPLY SHS AB
Original Assignee
SWEDISH HOSPITAL SUPPLY SHS AB
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 SWEDISH HOSPITAL SUPPLY SHS AB filed Critical SWEDISH HOSPITAL SUPPLY SHS AB
Application granted granted Critical
Publication of US3789830A publication Critical patent/US3789830A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/06—Making more than one part out of the same blank; Scrapless working
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/3209—Incision instruments
    • A61B17/32093—Incision instruments for skin incisions
    • 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
    • A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
    • A61B5/150259—Improved gripping, e.g. with high friction pattern or projections on the housing surface or an ergonometric shape
    • 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
    • A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
    • A61B5/150274—Manufacture or production processes or steps for blood sampling devices
    • A61B5/150282—Manufacture or production processes or steps for blood sampling devices for piercing elements, e.g. blade, lancet, canula, needle
    • 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
    • A61B5/150427—Specific tip design, e.g. for improved penetration characteristics
    • 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
    • A61B5/15105—Purely manual piercing, i.e. the user pierces the skin without the assistance of any driving means or driving devices
    • 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
    • A61B5/15146—Devices loaded with multiple lancets simultaneously, e.g. for serial firing without reloading, for example by use of stocking means.
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49789—Obtaining plural product pieces from unitary workpiece
    • Y10T29/49794—Dividing on common outline

Definitions

  • a lancet is a surgical instrument having a sharp pointed end used for piercing the tissue of a patients finger to obtain blood specimens. It is manufactured from stainless steel and comprises a piercing portion having a sharp point which merges into a shoulder of substantially greater width which restricts the penetration depth of the lancet.
  • the shoulder is integrally formed with a relatively long handle or grip portion having an outer end (pressure surface) against which a persons thumb is placed for pushing the pointed end of the lancet into the tissue of a finger.
  • the handle includes substantially more material than is necessary for the lancet to perform its intended function. It has been estimated that the cost for materials in a lancet constitutes more than 40 percent of the lancet sales price and it therefore is obvious that reduction in the amount of material used will be reflected in reduced costs to the purchaser. Also, for both medical and economic reasons, a lancet is used only once and then discarded and this fact accordingly dictates that the lancet must be designed to achieve acceptable performance at the lowest manufacturing and material costs.
  • the present invention reduces the material and manufacturing costs for a lancet by about 50 percent. This reduction is obtained by the fact that the shoulder is connected with the handle by means of a neck portion having reduced width in relation to the shoulder and that the width of the handle increases from the width of the neck portion at the connection thereto in the direction of the free end of the handle. Another feature is that the handle is provided with recesses which are of the same size and shape as the shoulder portion or sections thereof.
  • the shoulder portion comprises two sections symmetrically positioned or only one section positioned at one side of the lancet.
  • lancets preferably are stamped from strips having substantially the same width as the entire length of each lancet, one lancet being positioned in one direction and the adjacent lancets being positioned in the opposite direction, the sections of the shoulder of one lancet being formed by corresponding recesses in the adjacent lancets.
  • An object of the invention is to provide a highly functional lancet capable of being manufactured at low cost
  • Another object of the invention is the provision of an improved manufacturing process which stamps or punches multiple lancets from strips of sheet steel.
  • FIG. 1 is a plan view of a steel strip illustrating multiple lancets punched therefrom during a manufacturing operation
  • FIG. 1 a strip 10 of stainless steel or other material preferably having a thickness of 0.15 to 0.20 mm and of a length sufficient to stamp out multiple lancets during the manufacturing operation.
  • the plan view of FIG. 1 shows the configuration of each lancet 11 as the manufacturing proceeds. To acquire perspective on the size, the lancets of FIG. 1 are shown magnified about 5 times the actual size of a lancet used for blood specimen purposes.
  • Each lancet 11 is provided with a piercing portion having a sharp point 12 which enters the tissue of a patients finger when the lancet is being used.
  • the piercing portion uniformly increases in width from point 12 and merges in a shoulder 13 having two reversed sections 13a and 13b of the same shape symmetrically positioned with respect to the longitudinal axis of the lancet.
  • the function of the shoulders is to restrict the distance that the piercing portion may be inserted in a finger and the piercing portion length may obviously-vary depending on lancet use.
  • the lancet is preferably manufactured by a stamping or punching operation. Referring to FIG. 1, as the stainless steel strip 10 is fed into a machine having a die shaped to the configuration of a lancet, and the machine cycled for a first stamping operation, the lancet 1 la is first stamped out. The previously stamped lancet 1 1 is then detached from the strip although in the usual operation, the cut will be clean and the lancet will fall into a collecting bin.
  • the lancet 1 1d is stamped out and the lancet 1 1c detached, and so on, until the strip is exhausted. It will be noted that two lancets are formed by each stamping operation, thus doubling the speed of production over prior methods. Further, the design of the lancet has been chosen to utilize to the maximum extent, all the material in the steel strip. Reference to FIG. 1 shows that the only material wastage is that small amount between the pressure surface 16 and the edge of the strip.
  • the lancets are stamped from strips having substantially the same width as the entire length of each lancet, one lancet being positioned in one direction and the adjacent lancet being positioned in the opposite direction, with the sections of the shoulder of one lancet being formed by the corresponding recesses in the adjacent lancets.
  • the lancets are manufactured by being stamped from strips having substantially the same width as the maximum width of the grip portion or handle, one lancet being positioned in one direction and the adjacent lancet being positioned in the opposite direction, and the shoulder of each lancet being formed by a corresponding recess in the handle of the adjacent lancet.
  • Each lancet comprises a piercing portion 22 which merges into a single shoulder 23 asymmetrically positioned on one side of the lancet.
  • the shoulder 23, which is substantially triangular in shape, continues into the grip portion or handle 24 of the lancet.
  • the width of the handle increases in the direction of the free end 25 and is rounded to provide a pressure surface 26.
  • a recess 27 having the same configuration as the shoulder 23 is formed in the free end 25 of the handle.
  • the strip 20 is provided with two stiffening depressions 28 to impart strength and rigidity to the lancet.
  • the section 3011 is first separated from the strip to form the pressure surface 26 on the lancet 21a.
  • the strip 20 is fed forward along the length of one lancet and is cut at 31 to separate the two lancets 21a and 21b from each other.
  • the section 30b is then stamped out either during the same operation when cut 31 is made or in a separate operation.
  • each Upon separation of the two lancets, each will be provided with sharp points 22 as a result of cutting along the length and into the edge of the strip material.
  • said grip portion includes recesses on opposite sides of the grip portion axis which are complementary to the configuration of said penetration limiting portion.
  • said penetration limiting portion comprises a pair of sections projecting respectively, transversely from the longitudinal axis of said grip portion and are symmetrically disposed relative to said axis, and said sections each having an edge on the piercing portion side of said penetration limiting portion which lies perpendicular to said axis for limiting the depth of penetration of said piercing portion.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Surgery (AREA)
  • Medical Informatics (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Hematology (AREA)
  • Pathology (AREA)
  • Biophysics (AREA)
  • Manufacturing & Machinery (AREA)
  • Dermatology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
US00182862A 1970-09-23 1971-09-22 Disposable lancet Expired - Lifetime US3789830A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE12912/70A SE360973B (de) 1970-09-23 1970-09-23
US18286271A 1971-09-22 1971-09-22

Publications (1)

Publication Number Publication Date
US3789830A true US3789830A (en) 1974-02-05

Family

ID=46671851

Family Applications (2)

Application Number Title Priority Date Filing Date
US00182862A Expired - Lifetime US3789830A (en) 1970-09-23 1971-09-22 Disposable lancet
US00372487A Expired - Lifetime US3822461A (en) 1970-09-23 1973-06-22 Disposable lancet

Family Applications After (1)

Application Number Title Priority Date Filing Date
US00372487A Expired - Lifetime US3822461A (en) 1970-09-23 1973-06-22 Disposable lancet

Country Status (6)

Country Link
US (2) US3789830A (de)
JP (1) JPS5123831B1 (de)
DE (2) DE2147049C3 (de)
FR (1) FR2108423A5 (de)
GB (1) GB1334918A (de)
SE (1) SE360973B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4552146A (en) * 1982-05-18 1985-11-12 Myocur, Inc. Disposable ophthalmic instrument for performing radial keratotomy on the cornea
US5607437A (en) * 1990-07-12 1997-03-04 University Of Miami Instruments for use in performing gel injection adjustable keratoplasty
US20060030788A1 (en) * 2004-08-04 2006-02-09 Daniel Wong Apparatus and method for extracting bodily fluid utilizing a flat lancet
US20080082023A1 (en) * 2005-03-03 2008-04-03 Frank Deck Puncturing system for withdrawing a body fluid
US20090177118A1 (en) * 2006-07-21 2009-07-09 Hans-Peter Haar Multi-lancet device
US20090204138A1 (en) * 2006-08-05 2009-08-13 Thomas Weiss Lancet having a ground tip and method for producing

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54137930U (de) * 1978-03-15 1979-09-25
US4777096A (en) * 1984-12-14 1988-10-11 Ethicon, Inc. Sheet containing a plurality of surgical needles
US4832316A (en) * 1985-02-25 1989-05-23 Mincher William H Wall security fixtures
US5792180A (en) * 1996-01-23 1998-08-11 United States Surgical Corporation High bend strength surgical needles and surgical incision members and methods of producing same by double sided photoetching
US5762811A (en) * 1996-01-24 1998-06-09 United States Surgical Corporation One-sided photoetching process for needle fabrication
US5693454A (en) * 1996-01-24 1997-12-02 United States Surgical Corporation Two-sided photoetching process for needle fabrication
EP0861670A3 (de) * 1997-02-01 1999-06-02 Wagner, Wolfgang, Dr.med. Punktionsspitze an Griffel oder Teststreifen zur Blutgewinnung aus der Haut einer Lebewesens, bevorzugte Verfahren ihrer Anwendungsweise und bevorzugte Verfahren ihrer Herstellung
DE10031095B8 (de) * 2000-06-30 2011-08-04 ElringKlinger AG, 72581 Verfahren zum Herstellen einer mehrlagigen Dichtung und Dichtung
DE10315544B4 (de) * 2003-04-04 2007-02-15 Roche Diagnostics Gmbh Verfahren zur Herstellung einer Stech- und Mess-Vorrichtung sowie Vorrichtung
DE102004058164B4 (de) * 2004-12-02 2009-04-16 Roche Diagnostics Gmbh Stechvorrichtung zur Entnahme von Blut und Verfahren zur Herstellung dafür

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3060937A (en) * 1960-09-09 1962-10-30 Dade Reagents Inc Lancet and method of forming
US3517670A (en) * 1967-11-09 1970-06-30 Propper Mfg Co Inc Blood-letting lancet

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US169364A (en) * 1875-11-02 Improvement in blanks for gas-fitters hooks
FR1013193A (fr) * 1950-02-23 1952-07-23 Procédé pour la fabrication de couverts de table
US3037271A (en) * 1958-01-28 1962-06-05 Smith Corp A O Method of fabricating vehicle control arms
US3143793A (en) * 1962-06-08 1964-08-11 Dade Reagents Inc Method of forming a lancet

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3060937A (en) * 1960-09-09 1962-10-30 Dade Reagents Inc Lancet and method of forming
US3517670A (en) * 1967-11-09 1970-06-30 Propper Mfg Co Inc Blood-letting lancet

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4552146A (en) * 1982-05-18 1985-11-12 Myocur, Inc. Disposable ophthalmic instrument for performing radial keratotomy on the cornea
US5607437A (en) * 1990-07-12 1997-03-04 University Of Miami Instruments for use in performing gel injection adjustable keratoplasty
US5931846A (en) * 1990-07-12 1999-08-03 University Of Miami Instruments for use in performing gel injection adjustable keratoplasty
US20060030788A1 (en) * 2004-08-04 2006-02-09 Daniel Wong Apparatus and method for extracting bodily fluid utilizing a flat lancet
US20080082023A1 (en) * 2005-03-03 2008-04-03 Frank Deck Puncturing system for withdrawing a body fluid
US8231547B2 (en) 2005-03-03 2012-07-31 Roche Diagnostics Operations, Inc. Puncturing system for withdrawing a body fluid
US20090177118A1 (en) * 2006-07-21 2009-07-09 Hans-Peter Haar Multi-lancet device
US8394035B2 (en) 2006-07-21 2013-03-12 Roche Diagnostics Operations, Inc. Multi-lancet device
US20090204138A1 (en) * 2006-08-05 2009-08-13 Thomas Weiss Lancet having a ground tip and method for producing

Also Published As

Publication number Publication date
SE360973B (de) 1973-10-15
FR2108423A5 (de) 1972-05-19
GB1334918A (en) 1973-10-24
DE2147049A1 (de) 1972-05-18
DE7135816U (de) 1976-02-26
DE2147049B2 (de) 1975-01-23
JPS5123831B1 (de) 1976-07-20
DE2147049C3 (de) 1975-09-11
US3822461A (en) 1974-07-09

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