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
  • A61B5/150007—Details
  • A61B5/150885—Preventing re-use
  • A61B5/150923—Preventing re-use by means for destroying components or parts, e.g. by cutting or piercing
  • A61B5/150938—Preventing re-use by means for destroying components or parts, e.g. by cutting or piercing by blunting or disabling 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
  • A61B5/150015—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
  • A61B5/150274—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
  • A61B5/150435—Specific design of proximal end
• • 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
• • 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
  • A61B5/150549—Protectors removed by rotational movement, e.g. torsion or screwing
• • 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
  • A61B5/15115—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

Definitions

• the conventional construction of such a lancet is a steel needle encased almost entirely in an elongate plastics body but with its sharp tip projecting from one end.
• the plastics body eases handling and can be shaped to be guided by a compatible firing device and to locate one end of a spring which shoots the lancet forwards when released.
• a lancet for skin pricking comprising an elongate plastics body with a plastics insert at one end providing a sharp tip projecting from that end, the plastics material of the insert being a liquid crystal polymer.
• Such a liquid crystal polymer when melted, has extremely low viscosity and can flow almost like water. It can therefore penetrate fully into the part of a mould cavity which will form the needle tip. Moreover its strength when set in the direction of flow is very high. Therefore the insert emerges from the mould with the tip sharp and ready for use.
• Liquid crystal polymers are expensive, and so the body of the lancet will be of less costly material and polyethylene can continue to be used.
• the body and the insert can be formed together in a single process by twin-shot moulding.
• the body is generally tubular, the insert plugging one end.
• This enables the spring of a firing device to enter the other, open end of the body and to act directly on the insert, the body then serving primarily as guide member. Because the spring would not then act on the rear end of the body, this could enable the firing device to be more compact than existing ones.
• a further advantage of the all-plastics construction is that such lancets will be easier to dispose of completely by incineration: there will be no steel needles to melt down or burn away.
• Figure 1 is a side view of an all-plastics lancet of the invention
• Figure 2 is a side view at 90° to that of Figure 1 ;
• Figure 3 is a cross-section through the lancet shown in Figure 1.
• the lancet has a generally tubular body 1 with four evenly spaced external longitudinal fins 2. Two opposed ones are interrupted at their mid- length by apertures 3 through the body 1 , left as part of the moulding process.
• a hollow insert 4 with a closed end plugs one end of the body 1 , and it has a co-axial projection 5 forming a sharp tip proud of that end of the body.
• the insert 4 is moulded first, then the body 1 is moulded over the insert 4 during a twin-shot moulding process, forming a twist-off cap 6 which provides a sterile shield surrounding and protecting the needle tip 5.
• the body is formed from a low cost relatively soft material such as polyethylene, whilst the insert is formed from a liquid crystal polymer.

Landscapes

• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Animal Behavior & Ethology (AREA)
• Public Health (AREA)
• Pathology (AREA)
• Physics & Mathematics (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Medical Informatics (AREA)
• Molecular Biology (AREA)
• Surgery (AREA)
• Hematology (AREA)
• General Health & Medical Sciences (AREA)
• Biophysics (AREA)
• Veterinary Medicine (AREA)
• Manufacturing & Machinery (AREA)
• Dermatology (AREA)
• Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
• Small-Scale Networks (AREA)
• Injection Moulding Of Plastics Or The Like (AREA)
• Window Of Vehicle (AREA)
• Materials For Medical Uses (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)
• Solid-Sorbent Or Filter-Aiding Compositions (AREA)
• Medicines Containing Material From Animals Or Micro-Organisms (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9930402

Family Applications (1)

Country Status (7)

Cited By (3)

Families Citing this family (67)

Citations (5)

Family Cites Families (15)

• 2002
  • 2002-02-05 GB GBGB0202603.7A patent/GB0202603D0/en not_active Ceased
• 2003
  • 2003-02-05 JP JP2003565562A patent/JP4361802B2/ja not_active Expired - Fee Related
  • 2003-02-05 AT AT03737358T patent/ATE391522T1/de not_active IP Right Cessation
  • 2003-02-05 WO PCT/GB2003/000473 patent/WO2003066140A1/en not_active Ceased
  • 2003-02-05 DE DE60320222T patent/DE60320222T2/de not_active Expired - Lifetime
  • 2003-02-05 US US10/503,633 patent/US8211133B2/en not_active Expired - Fee Related
  • 2003-02-05 EP EP03737358A patent/EP1474193B1/en not_active Expired - Lifetime

Patent Citations (5)

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