Classifications

• • 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
  • A61M25/00—Catheters; Hollow probes
  • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
  • A61M25/06—Body-piercing guide needles or the like
• • 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
  • A61M25/00—Catheters; Hollow probes
  • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
  • A61M25/06—Body-piercing guide needles or the like
  • A61M25/0612—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
  • A61M25/0631—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle

Definitions

• This invention concerns a catheter device of the kind (hereinafter termed "of the kind referred to") wherein a catheter is introduced into a blood vessel by being advanced over a needle which has previously penetrated the vessel. After the catheter is in position the needle and its support means is removed and discarded.
• a catheter device of the kind referred to comprising a needle extending from a support means, a catheter extending from a catheter hub, means for pushing the hub over the needle to advance the catheter forwardly from the needle and slidable along guide means having stop means at its forward end, the means for pushing the hub having a shield at its forward end in which the needle tip locates when the pushing means is arrested by said stop means.
• the means for pushing the hub may engage the guide means such that reverse movement is prevented.
• the support means may comprise a finger grip from which the guide means extends.
• the guide means may comprise a pair of spaced parallel fingers which pass through apertures in the means for pushing the hub.
• the fingers may incorporate ramped tooth means which engage the apertures to prevent reverse movement of the means for pushing the hub.
• the fingers may be upwardly bowed at their forward ends to tilt the shield at the end of its forward stroke whereby the needle tip locates behind a lip in the shield.
• Figure 1 shows a perspective view of a first form of device at an initial position
• Figure 2 shows a perspective view of the device of Figure 1 at an intermediate position
• Figure 3 shows a perspective view of the needle of the device of Figure 1 and its support means after removal from the catheter hub;
• Figures 4 to 6 show perspective views similar to those of Figures 1 to 3, but of a second form of device
• the first form of catheter device comprises a finger grip 10 which mounts a forwardly extending hollow needle 11 which passes through a catheter 12 and catheter hub 13 from which the catheter 12 extends.
• a hub pusher 14 having a forwardly extending cylindrical shield 15 is slidable over the needle 11 to advance the catheter 12 and hub 13 forwardly.
• Spaced parallel guide fingers 16 extend forwardly from the finger grip 10 and pass through apertures 17 in the pusher 14.
• Ramped teeth 18 on the fingers 16 co-operate with the apertures 17 to prevent reverse movement of the pusher 14.
• the finger grip 10 is manipulated to introduce the tip of the needle 11 into a blood vessel.
• the needle 11 has an aperture in its wall behind its open forward end so that blood will be visible within the catheter 12 when the needle 11 has penetrated the vessel as an aid to correct insertion of the needle.
• the pusher 14 is now moved forwardly to advance the catheter 12 into the blood vessel.
• the second form of device is of generally similar construction.
• the fingers 16 are upwardly bowed at their forward ends to cause the shield 15 to tilt at the end of its forward stroke to locate the needle tip behind a lip 20 at the forward end of the shield 15.
• the upward bow of the forward ends of the fingers is such that when they are parallel to the skin the needle will be at the correct angle for penetration of a blood vessel.
• the clearance between the needle 11 and the rearward end of the pusher 14 on both embodiments is no more than to provide a sliding fit whereby advancement of the pusher 14 serves to wipe blood from the needle 11 into a cavity 40 within the pusher 14.
• Each embodiment may include means for indicating that blood has reached that end of the needle (flash back) proximate the finger grip 10.
• This may be implemented by providing the finger grip 10 with a chamber (not shown) into which the needle opens so that blood passing along the length of the needle enters into the chamber.
• the chamber may include an observation window, or alternatively it may be defined at least in part by a wall composed of material which is sufficiently transparent that blood entering the chamber can be observed by the person carrying out the fitting of the catheter to a patient.

Landscapes

• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Biophysics (AREA)
• Pulmonology (AREA)
• Engineering & Computer Science (AREA)
• Anesthesiology (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Hematology (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Media Introduction/Drainage Providing Device (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=10863785

Family Applications (1)

Country Status (11)

Families Citing this family (22)

Family Cites Families (6)

• 1999
  • 1999-11-03 GB GB9925890A patent/GB2355933B/en not_active Expired - Fee Related
• 2000
  • 2000-10-16 CA CA002388672A patent/CA2388672A1/en not_active Abandoned
  • 2000-10-16 CN CN00815200A patent/CN1387448A/zh active Pending
  • 2000-10-16 WO PCT/GB2000/003967 patent/WO2001032253A1/en not_active Application Discontinuation
  • 2000-10-16 MX MXPA02004396A patent/MXPA02004396A/es not_active Application Discontinuation
  • 2000-10-16 KR KR1020027005687A patent/KR20020071857A/ko not_active Application Discontinuation
  • 2000-10-16 AU AU78070/00A patent/AU7807000A/en not_active Abandoned
  • 2000-10-16 EP EP00968115A patent/EP1225947A1/en not_active Withdrawn
  • 2000-10-16 JP JP2001534456A patent/JP2003512903A/ja not_active Withdrawn
• 2002
  • 2002-05-02 NO NO20022106A patent/NO20022106L/no not_active Application Discontinuation
  • 2002-05-31 ZA ZA200204369A patent/ZA200204369B/xx unknown

Non-Patent Citations (1)

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