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US3788119A - Method of forming spinal needle - Google Patents

Method of forming spinal needle Download PDF

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Publication number
US3788119A
US3788119A US00281573A US3788119DA US3788119A US 3788119 A US3788119 A US 3788119A US 00281573 A US00281573 A US 00281573A US 3788119D A US3788119D A US 3788119DA US 3788119 A US3788119 A US 3788119A
Authority
US
United States
Prior art keywords
obturator
cannula
needle
tip
assembly
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
US00281573A
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English (en)
Inventor
A Arrigo
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.)
OMNIS SURGICAL Inc A DE CORP
Original Assignee
Baxter Laboratories Inc
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 Baxter Laboratories Inc filed Critical Baxter Laboratories Inc
Application granted granted Critical
Publication of US3788119A publication Critical patent/US3788119A/en
Assigned to OMNIS SURGICAL INC., A DE CORP. reassignment OMNIS SURGICAL INC., A DE CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BAXTER TRAVENOL LABORATORIES, INC.
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
    • B21G—MAKING NEEDLES, PINS OR NAILS OF METAL
    • B21G1/00—Making needles used for performing operations
    • B21G1/08—Making needles used for performing operations of hollow needles or needles with hollow end, e.g. hypodermic needles, larding-needles
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3401—Puncturing needles for the peridural or subarachnoid space or the plexus, e.g. for anaesthesia

Definitions

  • the present invention relates to a process for the formation of a cutting tip on a needle assembly which includes a cannula and an internal obturator. More particularly the process contemplates the formation of a beveled tip on both cannula and obturator during the same operation.
  • the final assembly Through utilization of the techniques of the present invention the final assembly, firstly, will have no appreciable clearance or mismatch between the cannula and the obturator and, secondly, the tip faces will be flush, parallel and concentric.
  • a coring needle may prevent the free flow of fluid to the patient or the aspiration of fluid from the patient.
  • fluid flow is impeded requiring removal and aspiration to clear the core. This obviously is an annoying hindrance to the operator and a cause of additional trauma to the patient.
  • Prior art procedures'followed in the fabrication of such a needle assembly fail to provide for the formation of a needle device having features of the type now contemplated.
  • One procedure of the prior art is to introduce the obturator shank within the cannula lumen and mechanically hold the obturator in the desired position relative to the cannula. Even though securely held, the beveling operation causes the obturator shank to snake back toward the hub. This is because the obturator shank is of smaller crosssection. After completion of the bevel operation the obturator shank is free again to move forward within the lumen. Forward movement most likely will extend the obturator shank beyond the beveled cannula tip.
  • the shank does not so extend it may fall short of the beveled cannula tip.
  • the hazard is that in performing a tissue puncture the needle may core the tissue. Further, because of a poor fit, there may be leakage which may cause headache.
  • the present invention overcomes the above problems and permits the manufacture of a needle assembly in which the clearance between the cannula inner wall and the obturator is at a minimum and the beveled tips of the components lie within a single plane thereby to be flush one with the other.
  • a needle assembly is formed by locating the shank of an obturator in an operative disposition within the lumen of a cannula so that the latter may be either swaged or drawn down substantially on the obturator in at least the vicinity of the cannula end'whereupon the components together and under a condition in which the obturator is substantially immobilized both in longitudinal and rotational movement are provided with a beveled tip.
  • FIG. la is a side view of the needle assembly
  • FIG. lb is a view of the assembly tip rotated, with respect to FIG. la, through FIG. 2 is an enlarged view in partial section of the assembly tip;
  • FIG. 3 is a view similar to FIG. 2 with, however, the cannula swaged or drawn down on the obturator therein;
  • FIG. 4 is a view similar to FIG. 2 illustrating the beveled tip
  • FIG. 5 is an end view of the beveled tip of FIG. 4.
  • the invention may be seen to best advantage in FIGS. 2-5 illustrating the several steps in the process of forming the beveled cutting tip of noncoring needle 10.
  • the needle as seen in FIG. 1 includes a hub 12 and an elongated needle cannula 14 secured at one end to the hub.
  • the hub may be formed of molded plastic or, if desired, of metal. However, if the assembly is to be of the disposable type preferablyit will be of molded plastic.
  • the cannula is secured to the hub in any conventional manner. Staking or use of an adhesive epoxy system, for example, may be employed for securement.
  • An obturator including a hub portion 16 and a shank portion 18 is supportedby cannula hub 12 so that the shank passes within the lumen.
  • the shank length of the obturator will be substantially equal to the shank length of the cannula. Therefore, upon mating receipt and support of the obturator hub 16 within the needle hub 12 the shank will extend at least to the end of the cannula. Care should be taken thatthis disposition pertains.
  • the invention as has been briefly discussed contemplates the formation of a cutting tip on a needle assembly which by the elimination of appreciable clearance and mismatch between the cannula and obturator points and wall surfaces substantially eliminates the problem of tissue coring.
  • assembly components are received and positively oriented one within the other, i.e., the obturator is received by the cannula throughout the length of the latter.
  • Structure for assuring proper relationship of assembled components and for preventing rotational displacement of components during use of the needle may be as desired.
  • the needle hub includes a slot. A projection on the obturator hub is received by the slot in the operative position. This is generally illustrated at in FIG. I. 4 V
  • the process to be described hereinafter relates to the formation of a bevel tip on a needle, such as a spinal needle, and a contained obturator such that the surface formed will be perfectly flush in all planes.
  • the invention may be carried out upon assemblies including a needle and obturator of any particular extending length. Further, the principles of the invention may be practiced upon needles of any suitable gauge M
  • a needle of 22-gauge has been successfully utilized in the process. In this connection there was no appreciable clearance and mismatch between the cannula and the obturator points and wall surfaces in the final assembled product. Thus as illustrated in FIGS. 1 and 4, the length of the cannula and obturator are equal so that the beveled cutting surfaces lie in the same plane.
  • the cannula may be, for example, 1 /2, 2 and 3% inches (all i ,4; inch) in length as measured from the hub 12. While these dimensions are considered of standard length for medical needles, it should be apparent that the length of the needle shank may vary from the aforementioned, as desired. The length is denoted by the indicia A inFIG I. WA w W4 Both the needle 14 and the obturator 18 are subjected to the foregoing operations (see FIG. 3). As described above, care must first be taken with regard to the positioning of' the obturator. Thus, the obturator must be disposed in the position of FIG. 1 at the commencement of either the swaging or drawing operation.
  • the obturator shank should be at least equal in length to the length of the cannula which may further lengthen by a small increment when sw e or st rt! ..MM
  • swaging may be accomplished by means of dies of proper shape which are caused to rotate about the piece to be swaged and which are caused to strike blows at suitable intervals as the needle assembly is inserted or pushed into the swager with a slow and even pressure.
  • the assembly preferably is disposed in a centering fixture for this operation.
  • the dies are thrown clear of the piece by centrifugal force.
  • Each blow of the die produces a flow of metal which is greatest in the direction opposite to that of the feed direction.
  • the piece is retained against movement at the speed of the die spindle so that the blows will overlap each other to produce a smooth surface. Removal of the assembly from the swager s a s bs .w ittal s19! .srenmsvsmqnt.
  • the outer diameter B of the needle will have been reduced from approximately 0.0280 to 0.0285 inches to approximately 0.0260 to 0.0270 inches.
  • the operation in addition to reducing both the internal and outside diameter of the needle may also serve to cause the material of the needle to flow in the feed direction and thereby increase the length by a small increment.
  • the swaging or drawing operation will force the needle wall throughout substantially the swaged or drawn length thereof into substantial contact with the obturator shank. More particularly, it is contemplated that the internal diameter of the swaged or drawn needle will be in excess of the outer diameter of the obturator by approximately 0.000050/0.000300 inches.
  • the diameter C of the obturator shank may be from approximately 0.0140 to 0.0145 inches while the swaged or drawn internal diameter of the needle E will be in excess thereof by the above factor. At this point the obturator is for all intents and purposes immobilized within the cannula by surface friction.
  • the needle will have been drawn or swaged to an outer diameter D of from approximately 0.0260 to 0.0270 inches through a length F of from approximately 0.187 to 0.062 inches.
  • the swaging or drawing of the needle wall becomes more pronounced toward the tip.
  • the spacing between the internal needle wall and the obturator surface becomes progressively less approaching the tip whereat the spacing will be substantially nonexistent.
  • FIG. 4 illustrates the assembly after having provided the needle 14 to obturator 18 with a beveled tip.
  • the obturator will be prevented in any appreciable movement and the tipping operation by which the faces are formed to be flush, parallel and concentric may be carried out on the two components at the same time.
  • the assembly is positioned in a split die which is then closed by means of a mechanical clamp. Each die will necessarily be of correct guage gauge and have the desired angle.
  • a cutting punch is cycled to shear the point to the desired bevel. During this operation the needle assembly is held rigidly both on the diameter of the cannula and the swaged portion of the cannula.
  • a bevel length G of from appoximately 0.061 to 0.072 inches and at a bevel angle of from approximately 20 30 to 23 30' may be provided.
  • a second point length H of from approximately 0.021 to 0.03l may also be provided. The second point is shown at 22 in FIG. 5.
  • a grinding operation may also be employed in tip formation. The spacing between the needle wall and the obturator becomes increasingly less toward the tip end (see FIG. 3). Therefore, away from this end the spacing is greater.
  • the tipping operation utilizing a die or grinding techniques, results in a shortening of the cannula length within the area of greatest frictional gripping. Through this operation the frictional gripping capability will be reduced and the obturator will be adapted for free sliding movement within the cannula lumen.
  • a needle assembly including a cannula and an internal obturator is provided with a smooth or flush surface across the beveled tip. Further, by practicing the process as described an assembly is formed which has no appreciable clearance between the needle internal wall and the obturator so that the problem of tissue coring is substantially obviated.
  • a method for forming a beveled tip on a needle assembly including at least a needle cannula and an obturator capable of receipt and positioning within as well as removal from the lumen of the cannula which comformed by grinding.

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  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • Anesthesiology (AREA)
  • Mechanical Engineering (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Surgical Instruments (AREA)
US00281573A 1972-08-17 1972-08-17 Method of forming spinal needle Expired - Lifetime US3788119A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28157372A 1972-08-17 1972-08-17

Publications (1)

Publication Number Publication Date
US3788119A true US3788119A (en) 1974-01-29

Family

ID=23077862

Family Applications (1)

Application Number Title Priority Date Filing Date
US00281573A Expired - Lifetime US3788119A (en) 1972-08-17 1972-08-17 Method of forming spinal needle

Country Status (10)

Country Link
US (1) US3788119A (fr)
JP (1) JPS525793B2 (fr)
BE (1) BE803236A (fr)
CA (1) CA989723A (fr)
DE (1) DE7328756U (fr)
FR (1) FR2196144B1 (fr)
GB (1) GB1430829A (fr)
IT (1) IT998374B (fr)
NL (1) NL156056B (fr)
SE (1) SE410151B (fr)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893445A (en) * 1974-01-09 1975-07-08 Becton Dickinson Co Bone marrow biopsy instrument
US3955558A (en) * 1974-11-04 1976-05-11 Medcom, Inc. Instrument for spinal taps
US4020837A (en) * 1975-11-04 1977-05-03 Pharmaco, Inc. (Entire) Hollow piercing tip for vial stoppers
US4403617A (en) * 1981-09-08 1983-09-13 Waters Instruments, Inc. Biopsy needle
US4561445A (en) * 1983-05-25 1985-12-31 Joseph J. Berke Elongated needle electrode and method of making same
EP0221007A1 (fr) * 1985-10-30 1987-05-06 Heiko Dr. Lübbers Canule de biopsie à aiguille mince avec mandrin
EP0310710A1 (fr) * 1986-09-26 1989-04-12 Jan Jacobus Zijlstra Aiguille pour ponction
US4889529A (en) * 1987-07-10 1989-12-26 B. Braun Melsungen Ag Needle
US4958901A (en) * 1987-07-13 1990-09-25 Neurodelivery Technology, Inc. Method for making a multi-lumen epidural-spinal needle and tip and stock configuration for the same
WO1992018174A1 (fr) * 1991-04-19 1992-10-29 Biotime, Inc. Canule
US5447465A (en) * 1993-08-19 1995-09-05 United States Surgical Corporation Method of treating needle blanks
US5477604A (en) * 1993-11-01 1995-12-26 Smith; Daniel Process for manufacturing taper point surgical needles
US5484417A (en) * 1991-04-19 1996-01-16 Biotime, Inc. Microcannula
WO1996018429A1 (fr) * 1994-12-14 1996-06-20 Xiaomeng Liu Canule pour ponctions dans les vaisseaux
US5688246A (en) * 1991-04-19 1997-11-18 Biotime, Inc. Microcannula
US6206755B1 (en) 1994-10-19 2001-03-27 United States Surgical Corporation Method and apparatus for making blunt needles
US20040030302A1 (en) * 2001-03-28 2004-02-12 Miyako Kamata Medical syringe, and method of producing the same
US20070191920A1 (en) * 2003-06-20 2007-08-16 Cardiac Pacemakers, Inc System for medical lead tunneling
US20090192486A1 (en) * 2001-11-02 2009-07-30 Meridian Medical Technologies ,Inc Automatic injector with anti-coring needle
US20120116322A1 (en) * 2010-11-06 2012-05-10 IntriMed Technologies, Inc. Method to fabricate a needle having a tapered portion between a distal tip and a longitudinal channel
US20170368268A1 (en) * 2014-12-11 2017-12-28 Facet Technologies, Llc Needle with multi-bevel tip geometry

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5157265A (fr) * 1974-11-15 1976-05-19 Hitachi Ltd

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1591021A (en) * 1924-09-27 1926-07-06 Davis & Geck Inc Needle
GB687597A (en) * 1950-08-23 1953-02-18 S & R J Everett & Co Ltd Improvements relating to surgical and like sewing needles
US2919692A (en) * 1956-02-23 1960-01-05 Ackermann Wolfgang Vertebral trephine biopsy instruments
US3308822A (en) * 1964-04-02 1967-03-14 Loretta Fontano Hypodermic needle
US3540447A (en) * 1967-09-29 1970-11-17 Becton Dickinson Co Spinal needle
US3585986A (en) * 1969-08-21 1971-06-22 Becton Dickinson Co Stylet

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE646559C (de) * 1934-11-23 1937-06-17 Brynjulf Ingebrigtsen Punktionsnadel
US3010197A (en) * 1958-01-30 1961-11-28 Roehr Engineering Company Method of making hypodermic needles and like articles
FR1225009A (fr) * 1959-02-11 1960-06-28 Aiguille hypodermique ou intraveineuse et son procédé de fabrication
JPS4124076Y1 (fr) * 1964-08-15 1966-12-07

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1591021A (en) * 1924-09-27 1926-07-06 Davis & Geck Inc Needle
GB687597A (en) * 1950-08-23 1953-02-18 S & R J Everett & Co Ltd Improvements relating to surgical and like sewing needles
US2919692A (en) * 1956-02-23 1960-01-05 Ackermann Wolfgang Vertebral trephine biopsy instruments
US3308822A (en) * 1964-04-02 1967-03-14 Loretta Fontano Hypodermic needle
US3540447A (en) * 1967-09-29 1970-11-17 Becton Dickinson Co Spinal needle
US3585986A (en) * 1969-08-21 1971-06-22 Becton Dickinson Co Stylet

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893445A (en) * 1974-01-09 1975-07-08 Becton Dickinson Co Bone marrow biopsy instrument
US3955558A (en) * 1974-11-04 1976-05-11 Medcom, Inc. Instrument for spinal taps
US4020837A (en) * 1975-11-04 1977-05-03 Pharmaco, Inc. (Entire) Hollow piercing tip for vial stoppers
US4403617A (en) * 1981-09-08 1983-09-13 Waters Instruments, Inc. Biopsy needle
US4561445A (en) * 1983-05-25 1985-12-31 Joseph J. Berke Elongated needle electrode and method of making same
EP0221007A1 (fr) * 1985-10-30 1987-05-06 Heiko Dr. Lübbers Canule de biopsie à aiguille mince avec mandrin
EP0310710A1 (fr) * 1986-09-26 1989-04-12 Jan Jacobus Zijlstra Aiguille pour ponction
US4889529A (en) * 1987-07-10 1989-12-26 B. Braun Melsungen Ag Needle
US4958901A (en) * 1987-07-13 1990-09-25 Neurodelivery Technology, Inc. Method for making a multi-lumen epidural-spinal needle and tip and stock configuration for the same
US5484417A (en) * 1991-04-19 1996-01-16 Biotime, Inc. Microcannula
US6248196B1 (en) 1991-04-19 2001-06-19 Biotime, Inc. Method for making a microcannula
WO1992018174A1 (fr) * 1991-04-19 1992-10-29 Biotime, Inc. Canule
US5688246A (en) * 1991-04-19 1997-11-18 Biotime, Inc. Microcannula
US5447465A (en) * 1993-08-19 1995-09-05 United States Surgical Corporation Method of treating needle blanks
US5477604A (en) * 1993-11-01 1995-12-26 Smith; Daniel Process for manufacturing taper point surgical needles
US6206755B1 (en) 1994-10-19 2001-03-27 United States Surgical Corporation Method and apparatus for making blunt needles
WO1996018429A1 (fr) * 1994-12-14 1996-06-20 Xiaomeng Liu Canule pour ponctions dans les vaisseaux
US20040030302A1 (en) * 2001-03-28 2004-02-12 Miyako Kamata Medical syringe, and method of producing the same
US20090192486A1 (en) * 2001-11-02 2009-07-30 Meridian Medical Technologies ,Inc Automatic injector with anti-coring needle
US7569035B1 (en) 2001-11-02 2009-08-04 Meridian Medical Technologies, Inc. Automatic injector with anti-coring needle
US20070191920A1 (en) * 2003-06-20 2007-08-16 Cardiac Pacemakers, Inc System for medical lead tunneling
US8065020B2 (en) * 2003-06-20 2011-11-22 Cardiac Pacemakers, Inc. System for medical lead tunneling
US20120116322A1 (en) * 2010-11-06 2012-05-10 IntriMed Technologies, Inc. Method to fabricate a needle having a tapered portion between a distal tip and a longitudinal channel
US20170368268A1 (en) * 2014-12-11 2017-12-28 Facet Technologies, Llc Needle with multi-bevel tip geometry
US11793942B2 (en) * 2014-12-11 2023-10-24 Facet Technologies, Llc Needle with multi-bevel tip geometry

Also Published As

Publication number Publication date
JPS525793B2 (fr) 1977-02-16
DE2339821A1 (de) 1974-03-07
NL156056B (nl) 1978-03-15
IT998374B (it) 1976-01-20
CA989723A (en) 1976-05-25
BE803236A (fr) 1973-12-03
DE7328756U (de) 1977-12-01
FR2196144A1 (fr) 1974-03-15
SE410151B (sv) 1979-10-01
GB1430829A (en) 1976-04-07
JPS4952490A (fr) 1974-05-21
DE2339821B2 (de) 1977-01-13
FR2196144B1 (fr) 1977-02-25
NL7311155A (fr) 1974-02-19

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Legal Events

Date Code Title Description
AS Assignment

Owner name: OMNIS SURGICAL INC., A DE CORP.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BAXTER TRAVENOL LABORATORIES, INC.;REEL/FRAME:004285/0631

Effective date: 19840709