GB2422108A - Safety catheter - Google Patents

Safety catheter Download PDF

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Publication number
GB2422108A
GB2422108A GB0500627A GB0500627A GB2422108A GB 2422108 A GB2422108 A GB 2422108A GB 0500627 A GB0500627 A GB 0500627A GB 0500627 A GB0500627 A GB 0500627A GB 2422108 A GB2422108 A GB 2422108A
Authority
GB
United Kingdom
Prior art keywords
barrel
stand
hub
needle
safety catheter
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.)
Withdrawn
Application number
GB0500627A
Other versions
GB0500627D0 (en
Inventor
Jerry W Parker
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.)
INNOVATIVE Manufacturing Co
Original Assignee
INNOVATIVE Manufacturing Co
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 INNOVATIVE Manufacturing Co filed Critical INNOVATIVE Manufacturing Co
Priority to GB0500627A priority Critical patent/GB2422108A/en
Publication of GB0500627D0 publication Critical patent/GB0500627D0/en
Publication of GB2422108A publication Critical patent/GB2422108A/en
Withdrawn legal-status Critical Current

Links

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
    • 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of the needle, e.g. wings or holders having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle
    • 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

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)

Abstract

A safety catheter has a stand (10), a spring (20), a barrel (30) and a hub (40). The stand (10) and the spring (20) are mounted slidably within the barrel (30). The stand (10) has a proximal end, a distal end, an outer surface, a needle (18) protruding from the proximal end and multiple annular notches (19) formed in and extending radially inward from the outer surface. The barrel (30) has multiple clipper springs (38) mounted on one end of the barrel (30). The clipper springs (38) can clip the annular notches (19) to hold the needle (18) introduced into the hub (40). After insertion of the catheter is complete, the hub (40) can be simply withdrawn from the catheter to let the needle (18) retract in the barrel (30) automatically to prevent accidental pricking of staff.

Description

1 2422108
SAFETY CATHETER
1. Field of the Invention
The present invention relates to a safety catheter, and more particularly to a safety catheter that withdraws an internal needle automatically.
2. Description of Related Art
A catheter is an instrument that is used to introduce certain fluids such as a saline solution directly into the bloodstream of a patient. Typically, a needle is first introduced through a catmula portion of the catheter and then into the skin of the patient at the desired location of the patient. Once insertion is complete, the needle is removed from the cannula portion of the catheter. After removing the needle, a fluid handling device such as a syringe is attached to the cannula. Fluid is then infused directly from the fluid handling device through the cannula of the catheter into the bloodstream of the patient.
When the needle is removed from the cannula, the medical personnel must place the exposed needle at a nearby disposal unit while simultaneously addressing the task of infusing the fluids into the patient. At this juncture, the exposed needle creates a danger of an accidental needle stick occurring which leaves the medical personnel vulnerable to the transmission of various, dangerous blood-borne pathogens. Careless disposal of used needles can put other health care workers at risk as well. Even others outside the health care profession, for example those involved in the clean-up and final disposal of medical waste can be at risk of an accidental needle stick from a carelessly discarded needle.
The main objective of the present invention is to provide a safety catheter that withdraws an internal needle automatically to prevent accidental pricking of staff etc. To achieve the objective, a safety catheter in accordance with the present invention comprises a stand, a spring, a barrel and a hub. The barrel has multiple clipper springs mounted on one end of the barrel. The stand is cylindrical and mounted slidably in the barrel and has a needle and multiple annular notches.
The needle has a blunt end inserted into one end of the stand and a sharp end protruding from the end of the stand into which the blunt end is inserted. The annular notches are formed in the outer surface of the stand. The spring is mounted in the barrel and around the stand and the needle and has two ends abutting respectively with the barrel and the stand. The hub is mounted with the barrel and has a chamber and a cannula. The chamber is formed in the hub, and the clipper springs are compressed in the chamber to engage with the notches in the stand and to make the hub connect with the barrel. The cannula is connected with the hub and communicates with the channel. Accordingly, the clipper springs can clip the annular notches to hold the needle introduced into the hub.
After insertion of the catheter is complete, the hub is simply withdrawn from the catheter to let the needle retract in the barrel automatically to prevent accidental pricking of staff.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
IN THE DRAWINGS
Fig. 1 is a partial exploded perspective view of a safety catheter in accordance with the present invention; Fig. 2 is an exploded perspective view of the safety catheter in Fig. 1; Fig. 3 is a cross sectional side view of the safety catheter in Fig. 1; and Fig. 4 is an operational cross sectional side view of the safety catheter in Fig. I showing the catheter with a needle automatically retracted into a barrel.
With reference to Figs. 1 and 2, a safety catheter in accordance with the present invention comprises a stand (10), a spring (20), a barrel (30), a hub (40), an optional cap (50) and an optional seal (60).
The stand (10) is cylindrical, is mounted slidably in the barrel (30) and has a proximal end (12), a distal end (14), an axis, a head (16), a channel (17), a needle (18), an outer surface and multiple annular notches (19). The head (16) is formed on and extends longitudinally outward from the distal end (14). The channel (17) is formed along the axis. The needle (18) has a sharp end (not numbered) and a blunt end (not numbered). The blunt end of the needle (18) is inserted into the channel (17) and the sharp end protrudes from the proximal end.
The multiple annular notches (19) are formed in and extend radially inward from the outer surface.
The barrel (30) has a closed end (32), an open end (34), a hole (36) and multiple clipper springs (38). The hole (36) is formed in the closed end (32). The multiple clipper springs (38) are connected in the closed end (32) and around the hole (36). Preferably, the clipper springs (38) are formed in pairs and each pair resembles a pair of tongs.
The spring (20) is mounted slidably in the barrel (30) and around the stand (10) and the needle (18) and has a proximal end (22) and a distal end (24).
The distal end (24) abuts the head (16) of the stand (10) and the proximal end (22) abuts the closed end (32) of the barrel (30).
The hub (40) is mounted with the barrel (30) and has a proximal open end, a distal closed end, a chamber (42), a center channel (45) and a cannula (44).
The chamber (42) is formed in the proximal open end. The center channel (45) is formed longitudinally and extends in the distal closed end to communicate with the chamber (42). The clipper springs (38) are compressed in the chamber (42) and let the hub (40) connect with the barrel (30). The cannula (44) is connected with the distal closed end and communicates with the channel (45).
The optional cap (50) covers the hub (40).
The seal (60) is mounted in the open end (34) of the barrel (30). The head (16) of the stand (10) abuts the seal (60) and the needle (18) is retained in the barrel (30) before use. Preferably, the seal (60) is a gas permeable seal.
With further reference to Fig. 3, the head (16) is pushed toward the closed end (32) of the barrel (30) and compresses the spring (20). The proximal end (12) of the stand (10) and the needle (18) are pushed through the hole (36) of the barrel (30) until the clipper springs (38) clip the notches (19) in the stand (10).
When the stand (10) is held by the clipper springs (38), the needle (18) passes through the cannula (44) and protrudes from the cannula (44).
With further reference to Fig. 4, the safety catheter is used to insert into a part of a body (70). The needle (18) with the cannula (44) is inserted into the body (70). When the barrel (30) is pulled back, the stand (10) with the needle (18) will move with the barrel (30) with the engagement of the clipper springs (38) and the notches (19) and separates from the hub (40). Then, the hub (40) will stay in the body (70) for further use so the hub (40) simply separates from the clipper springs (38) of the barrel (30). When the clipper springs (38) leave the chamber (42) of the hub (40), the clipper springs (38) spring outward and let the notches (19) leave from the engagements of the clipper springs (38). Then, the stand (10) with the needle (18) is automatically retracted in the barrel (30) by the tension of the spring (20), and to retract the needle (18) into the barrel (30) does not need any further action of the user. Accordingly, the user can operate the safety catheter with only one hand, and the use of the safety catheter is convenient and simple. The safety catheter in accordance with the present invention can retract the needle in the barrel automatically to prevent accidental pricking of staff.

Claims (7)

  1. CLAIMS: 1. A safety catheter comprising: a barrel (30) having multiple
    clipper springs (38) mounted on one end of the barrel (30); a cylindrical stand (10) mounted slidably in the barrel (30) and having an outer surface; a needle (18) having a blunt end inserted into one end of the stand (10) and a sharp end protruding from the end of the stand (10) into which the blunt end is inserted; and multiple annular notches (19) formed in the outer surface; a spring (20) mounted in the barrel (30) and around the stand (10) and the needle (18) and having two ends abutting respectively with the barrel (30) and the stand (10); and a hub (40) mounted with the barrel (30) and having a chamber (42) formed in the hub (40), wherein the clipper springs (38) are compressed in the chamber (42) to engage with the notches (19) in the stand and to make the hub (40) connect with the barrel (30); and a cannula (44) connected with the hub (40) and communicating with the channel (42).
  2. 2. The safety catheter as claimed in claim 1 further comprising a cap (50) attached to and selectively covering the hub (40).
  3. 3. The safety catheter as claimed in claim 1 or 2, wherein the clipper springs (38) are formed in pairs and each pair resembles a pair of tongs.
  4. 4. The safety catheter as claimed in claim 1 or 2, wherein the barrel (30) has a closed end (32) and a hole (36) formed in the closed end (32); and the clipper springs (38) are connected in the closed end (32) and arranged around the hole (36).
  5. 5. The safety catheter as claimed in claim 4, wherein the stand (10) has a proximal end (12) into which the needle (18) is inserted; a distal end (14); and a head (16) formed on and extending longitudinally outward from the distal end (14); and the spring (20) has a proximal end (22) abutting the closed end (32) of the barrel (30); and a distal end (24) abutting the head (16) of the stand (10).
  6. 6. The safety catheter as claimed in claim S further comprising a seal (60) mounted in the barrel (30) at an end opposite to the closed end (32).
  7. 7. The safety catheter as claimed in claim 6, wherein the hub (40) further has a center channel (45) formed longitudinally and extending in the hub (40) and communicating with the chamber (42).
GB0500627A 2005-01-13 2005-01-13 Safety catheter Withdrawn GB2422108A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0500627A GB2422108A (en) 2005-01-13 2005-01-13 Safety catheter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0500627A GB2422108A (en) 2005-01-13 2005-01-13 Safety catheter

Publications (2)

Publication Number Publication Date
GB0500627D0 GB0500627D0 (en) 2005-02-23
GB2422108A true GB2422108A (en) 2006-07-19

Family

ID=34224519

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0500627A Withdrawn GB2422108A (en) 2005-01-13 2005-01-13 Safety catheter

Country Status (1)

Country Link
GB (1) GB2422108A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996020026A2 (en) * 1994-12-23 1996-07-04 Haughton Victor M Catheter placement system providing retraction of the sharp upon disengagement of the catheter from the handle
EP0747087B1 (en) * 1995-06-07 2000-03-29 JOHNSON & JOHNSON MEDICAL, INC. Catheter release mechanism
US6436070B1 (en) * 1996-12-05 2002-08-20 Mdc Investment Holdings, Inc. Catheter insertion device with retractable needle
EP1486225A1 (en) * 1998-05-26 2004-12-15 Retractable Technologies, Inc. Self-retracting IV catheter introducer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996020026A2 (en) * 1994-12-23 1996-07-04 Haughton Victor M Catheter placement system providing retraction of the sharp upon disengagement of the catheter from the handle
EP0747087B1 (en) * 1995-06-07 2000-03-29 JOHNSON & JOHNSON MEDICAL, INC. Catheter release mechanism
US6436070B1 (en) * 1996-12-05 2002-08-20 Mdc Investment Holdings, Inc. Catheter insertion device with retractable needle
EP1486225A1 (en) * 1998-05-26 2004-12-15 Retractable Technologies, Inc. Self-retracting IV catheter introducer

Also Published As

Publication number Publication date
GB0500627D0 (en) 2005-02-23

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)