DE29513988U1 - Needle grinding - Google Patents

Needle grinding

Info

Publication number
DE29513988U1
DE29513988U1 DE29513988U DE29513988U DE29513988U1 DE 29513988 U1 DE29513988 U1 DE 29513988U1 DE 29513988 U DE29513988 U DE 29513988U DE 29513988 U DE29513988 U DE 29513988U DE 29513988 U1 DE29513988 U1 DE 29513988U1
Authority
DE
Germany
Prior art keywords
needle
grinding
tip
hollow needle
edge
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
DE29513988U
Other languages
German (de)
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.)
Mri Devices Daum De GmbH
Original Assignee
Daum GmbH
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 Daum GmbH filed Critical Daum GmbH
Priority to DE29513988U priority Critical patent/DE29513988U1/en
Publication of DE29513988U1 publication Critical patent/DE29513988U1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • A61M5/3286—Needle tip design, e.g. for improved penetration

Landscapes

  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Description

Daum GmbHDaum GmbH

PAT-DE-031PAT-DE-031

Nadelschliff Seite 2Needle grinding page 2

O Beschreibung O Description

Die Erfindung betrifft einen Anschliff für eine medizinische Hohlnadel nach dem Oberbegriff des Anspruchs 1.The invention relates to a bevel for a medical hollow needle according to the preamble of claim 1.

Aus diversen technischen Gründen kann es erforderlich sein, medizinische Nadeln wie z.B. Punktions- oder Biopsienadeln, aus einem nicht besonders harten Material herzustellen. Ein solcher Grund kann vorliegen, wenn eine spezielle Titanlegierung genutzt werden soil, die z.B. im Kernspintomographen nur geringe Artefakte zeigen darf. Hierbei besteht dann das Problem, eine noch ausreichend stabile Spitze an die Nadel zu bekommen. Die Erfindung stellt eine mögliche Lösung zu diesem Problem dar.For various technical reasons, it may be necessary to manufacture medical needles, such as puncture or biopsy needles, from a material that is not particularly hard. One such reason may be if a special titanium alloy is to be used, which, for example, must only show minor artifacts in an MRI scanner. The problem then arises of getting a sufficiently stable tip onto the needle. The invention represents a possible solution to this problem.

Figur 1 zeigt den erfinderischen Anschliff aus verschiedenen Ansichten. Die Kante 3 ist als innen schneidende Kante an der inneren Oberfläche des Nadelröhrchens 1 so geschliffen, daß die Spitze 4 entsteht. Würde die Facette ganz umlaufen, hätte die Nadelspitze einen Radius und dieser wäre länger, instabiler und könnte das Gewebe nicht so leicht durchdringen. Der erfinderische Anschliff verleiht der Hohlnadelspitze somit eine höhere Formstabiiiät als ein als Außenkante geschliffener und verringert somit die Einstichkräfte.Figure 1 shows the inventive grinding from different views. The edge 3 is ground as an internal cutting edge on the inner surface of the needle tube 1 in such a way that the tip 4 is created. If the facet were to run all the way around, the needle tip would have a radius and this would be longer, less stable and would not be able to penetrate the tissue as easily. The inventive grinding thus gives the hollow needle tip a higher dimensional stability than one ground as an external edge and thus reduces the piercing forces.

Weiterhin kann die Formstabilität dadurch erhöht werden, daß weitere Krümmungen 5, Fig. 2, in die Kante eingebracht werden. Eine solche Krümmung kann durch das Einbringen einer vogelschnabelartigen Facette erfolgen.Furthermore, the dimensional stability can be increased by introducing further curvatures 5, Fig. 2, into the edge. Such a curvature can be achieved by introducing a bird's beak-like facet.

Weiterhin kann durch Aufbringen einer Hartschicht, wie z. B. Titannitrid, auf das distale Nadelende eine höhere Härte und höhere Schneidfähigkeit erzielt werden. 25Furthermore, by applying a hard layer, such as titanium nitride, to the distal end of the needle, greater hardness and cutting ability can be achieved. 25

BezeichnerIdentifier

11 Nadelneedle 22 distaler Nadelteildistal needle part 30 330 3 geschliffene Innenkanteground inner edge 44 vordere Spitzefront tip

hintere Spitze als vogelschnabelartige Facetterear tip as bird's beak-like facet

Claims (5)

Daum GmbH PAT-DE-031 Nadelschiiff Seite ' PettfiriÄTI SprücheDaum GmbH PAT-DE-031 Needle boat page ' PettfiriÄTI sayings 1. Anschliff für eine medizinische Hohlnadel (1) dadurch gekennzeichnet, daß eine schneidende Kante (3) an der Innenfläche der Hohlnadel (1) ansetzt.1. Grinding for a medical hollow needle (1), characterized in that a cutting edge (3) is attached to the inner surface of the hollow needle (1). 2. Anschliff nach Anspruch 1 dadurch gekennzeichnet, daß dieser an der Hohinadelkante umlaufend ist.2. Grinding according to claim 1, characterized in that it runs all the way around the hollow needle edge. 3. Anschliff nach Anspruch 1 dadurch gekennzeichnet, daß der Anschliff facettiert ist.3. Polishing according to claim 1, characterized in that the polishing is faceted. 4. Anschliff nach Anspruch 1 bis 3 dadurch gekennzeichnet, daß die Nade! eine echte Spitze aufweist.4. Grinding according to claim 1 to 3, characterized in that the needle! has a real point. 5. Anschliff nach Anspruch 1 bis 4 dadurch gekennzeichnet, daß die Spitze mit einer Hartschicht beschichtet ist.5. Grinding according to claims 1 to 4, characterized in that the tip is coated with a hard layer.
DE29513988U 1995-08-30 1995-08-30 Needle grinding Expired - Lifetime DE29513988U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29513988U DE29513988U1 (en) 1995-08-30 1995-08-30 Needle grinding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE29513988U DE29513988U1 (en) 1995-08-30 1995-08-30 Needle grinding

Publications (1)

Publication Number Publication Date
DE29513988U1 true DE29513988U1 (en) 1995-11-30

Family

ID=8012445

Family Applications (1)

Application Number Title Priority Date Filing Date
DE29513988U Expired - Lifetime DE29513988U1 (en) 1995-08-30 1995-08-30 Needle grinding

Country Status (1)

Country Link
DE (1) DE29513988U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2877580A1 (en) * 2004-11-10 2006-05-12 Gambro Lundia Ab PLASTIC CANNULA

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3308822A (en) * 1964-04-02 1967-03-14 Loretta Fontano Hypodermic needle
DE2005519A1 (en) * 1970-02-06 1971-10-28 Roescheisen & Co Süddeutsche Bindenfabrik, 7900 Ulm Hypodermic syringe needle
US3788320A (en) * 1972-02-25 1974-01-29 Kendall & Co Spinal needle
DE2600299A1 (en) * 1975-01-09 1976-07-15 Nat Medical Products Corp CANNULES, AND THE PROCESS AND DEVICE FOR THEIR PRODUCTION
DE2649881A1 (en) * 1975-11-04 1977-05-12 Pharmaco Inc INJECTION NEEDLE
DD126865A1 (en) * 1976-08-12 1977-08-17
US5290267A (en) * 1991-01-17 1994-03-01 Fresenius Ag Hypodermic needle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3308822A (en) * 1964-04-02 1967-03-14 Loretta Fontano Hypodermic needle
DE2005519A1 (en) * 1970-02-06 1971-10-28 Roescheisen & Co Süddeutsche Bindenfabrik, 7900 Ulm Hypodermic syringe needle
US3788320A (en) * 1972-02-25 1974-01-29 Kendall & Co Spinal needle
DE2600299A1 (en) * 1975-01-09 1976-07-15 Nat Medical Products Corp CANNULES, AND THE PROCESS AND DEVICE FOR THEIR PRODUCTION
DE2649881A1 (en) * 1975-11-04 1977-05-12 Pharmaco Inc INJECTION NEEDLE
DD126865A1 (en) * 1976-08-12 1977-08-17
US5290267A (en) * 1991-01-17 1994-03-01 Fresenius Ag Hypodermic needle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2877580A1 (en) * 2004-11-10 2006-05-12 Gambro Lundia Ab PLASTIC CANNULA
WO2006051353A1 (en) * 2004-11-10 2006-05-18 Gambro Lundia Ab Plastic cannula

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Legal Events

Date Code Title Description
R163 Identified publications notified
R409 Internal rectification of the legal status completed
R207 Utility model specification

Effective date: 19960118

R156 Lapse of ip right after 3 years

Effective date: 19990601

R150 Utility model maintained after payment of first maintenance fee after three years

Effective date: 20000717

R081 Change of applicant/patentee

Owner name: MRI DEVICES DAUM GMBH, DE

Free format text: FORMER OWNER: DAUM GMBH, 19061 SCHWERIN, DE

Effective date: 20020802

R151 Utility model maintained after payment of second maintenance fee after six years

Effective date: 20030507

R152 Utility model maintained after payment of third maintenance fee after eight years

Effective date: 20031007

R071 Expiry of right