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
  • A61B5/153—Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
  • A61B5/154—Devices using pre-evacuated means
  • A61B5/1545—Devices using pre-evacuated means comprising means for indicating vein or arterial entry
• • 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
  • A61B5/15003—Source of blood for venous or arterial blood
• • 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
  • A61B5/150297—Manufacture or production processes or steps for blood sampling devices for piercing devices, i.e. devices ready to be used for lancing or piercing
• • 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
  • A61B5/150389—Hollow piercing elements, e.g. canulas, needles, 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
  • A61B5/150473—Double-ended needles, e.g. used with pre-evacuated sampling tubes
  • A61B5/150496—Details of construction of hub, i.e. element used to attach the double-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
  • A61B5/150381—Design of piercing elements
  • A61B5/150526—Curved or bent 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
  • A61B5/150572—Pierceable protectors, e.g. shields, caps, sleeves or films, e.g. for hygienic purposes
• • 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
  • A61B5/150633—Protective sleeves which are axially extensible, e.g. sleeves connected to, or integrated in, the piercing or driving device; pivotable protective sleeves
• • 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
  • A61B5/150732—Needle holders, for instance for holding the needle by the hub, used for example with double-ended needle and pre-evacuated tube
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/178—Syringes
  • A61M5/31—Details
  • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
  • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
  • A61M5/321—Means for protection against accidental injuries by used needles
  • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
  • A61M5/3234—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
  • A61M2005/3235—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user triggered by radial deflection of the anchoring parts between needle mount and syringe barrel or needle housing, e.g. spreading of needle mount retaining hooks having slanted surfaces by engagement with correspondingly shaped surfaces on the piston at the end of an injection stroke
  • A61M2005/3236—Trigger provided at the distal end, i.e. syringe end for mounting a needle
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/178—Syringes
  • A61M5/31—Details
  • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
  • A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
  • A61M2005/341—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub angularly adjustable or angled away from the axis of the injector
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/178—Syringes
  • A61M5/31—Details
  • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
  • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
  • A61M5/321—Means for protection against accidental injuries by used needles
  • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
  • A61M5/3234—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user

Definitions

• the needle is withdrawn from the vein and the sampler is either discarded, or alternatively, if the sampler is mounted in a syringe body as described in our earlier patent specification EP-A-0648136, it is automatically retracted under spring bias into the syringe body.
• the housing provides a passageway between the two needles and has a chamber therein with transparent walls through which the presence or absence of a blood sample will be visually apparent.
• the housing is formed of two parts which fit together so that one projects into the other and an annular space is defined between the parts which provides the chamber for viewing the presence of a sample. A relatively large initial volume of any sample is bled off into the annular chamber, and this can only be accomplished by venting air from the chamber.
• a needle assembly for a body fluids sampling device which comprises first and second hollow needles extending from opposing sides of a common hub, the proximal ends of the respective needles being in communication with each other by a passageway through the hub which is provided with a transparent window, whereby the passageway is visible, characterised in that the hub is formed in one piece and of transparent material.
• a patient's blood pressure will be sufficient to force some blood into the hollow needle used to pierce the vein and into the connecting duct between the proximal ends of the respective needles, where it can be viewed through the surrounding transparent material.
• the passageway or duct between the proximal ends of the respective needles is kept as short and as narrow as is feasible.
• needles conventionally used in blood sampling devices may have an outer diameter (OD) of about 0.9 to 1.0mm
• the passageway between the needle ends may be as little as 0.8mm wide in many embodiments of the present invention. Only the end sections of the passageway where end regions of the needles are accommodated need to be equal to the OD of the needles.
• the needle assembly of the invention (also referred to herein as a sampler device) is not limited to blood sampling, although that is likely to be its primarily application, and could be used or adapted for use in sampling other body fluids of human or animal origin.
• the needle intended to enter the patient's vein may be offset from the axis of the device, whereas the needle intended to enter the collection tube will need to remain in an axial disposition so as to pierce the septum of the collection tube centrally, at its weakest position, as the hub fits into the neck of the tube.
• Fig. 5 is a side elevation, also similar to Fig. 2, of a fourth practical embodiment of a needle assembly according to the present invention.
• the first needle 101 has, at one end, a multi-ground point 201 for penetration of a patients' skin and vein wall, while its other end 202 is plain and is bonded to the hub 107.
• the second needle 102 also has a ground point 203 at its free end, which is for piercing of a septum of a pre-evacuated blood sampling tube (not shown).
• the cover 118 would also be pierced in that operation.
• the other end 204 of the second needle 102 is also plain and is also bonded to the hub 107.
• substantially all of the hub 107, including all of the magnifier formation 104, may be located inside a transparent syringe body 300 with acceptable visibility of the witnessing duct 113.
• a second embodiment of the invention is an offset witnessing multi-sample needle assembly 20.
• the same reference numerals are used to designate parts which correspond to those of the first embodiment and these will not be described again.
• the passageway through the hub 107 consists of the aforesaid axially offset portions 108, 109, which lie substantially parallel to each other but extend in from opposing sides of the hub, and a transverse bridging portion 105 which connects these two offset portions 108, 109.
• the offset portions 108, 109 of the passageway are formed as blind bores from opposing sides of the hub 107.
• Each has a narrower inner end region delimited by a respective shoulder 208, 209 which serves to limit insertion of the proximal ends 202, 204 of the respective needles 101, 102 during manufacture.
• the needles 101, 102 are bonded to the hub 107 once inserted.
• the bridging portion 105 of the passageway extends between and substantially perpendicular to the narrower inner end regions of the offset portions 108, 109 of the passageway.
• the hub 107 is manufactured in one piece by injection moulding and the bridging portion 105 is formed during moulding by use of a sliding core. When the core is withdrawn the bridging portion 105 initially extends to, i.e. is open to, the outside of the hub 107. The open end may be sealed off by a plug 106, which may suitably be formed of polypropylene and may be a simple push fit therein.

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• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Biomedical Technology (AREA)
• Medical Informatics (AREA)
• Hematology (AREA)
• Biophysics (AREA)
• Pathology (AREA)
• Veterinary Medicine (AREA)
• Heart & Thoracic Surgery (AREA)
• Physics & Mathematics (AREA)
• Molecular Biology (AREA)
• Surgery (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Manufacturing & Machinery (AREA)
• Vascular Medicine (AREA)
• Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=32188474

Family Applications (1)

Country Status (7)

Cited By (2)

Families Citing this family (7)

Citations (7)

Family Cites Families (5)

• 2004
  • 2004-03-23 GB GBGB0406438.2A patent/GB0406438D0/en not_active Ceased
• 2005
  • 2005-03-22 JP JP2007504462A patent/JP2007530115A/ja not_active Withdrawn
  • 2005-03-22 WO PCT/GB2005/001061 patent/WO2005092174A1/en not_active Ceased
  • 2005-03-22 EP EP05729445A patent/EP1734857A1/en not_active Withdrawn
  • 2005-03-22 AU AU2005226942A patent/AU2005226942A1/en not_active Abandoned
  • 2005-03-22 CA CA002558527A patent/CA2558527A1/en not_active Abandoned
• 2006
  • 2006-09-20 US US11/523,836 patent/US20070088229A1/en not_active Abandoned

Patent Citations (7)

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