DE29513988U1 - Needle grinding - Google Patents
Needle grindingInfo
- 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
Links
- 238000005498 polishing Methods 0.000 claims 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 238000001574 biopsy Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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
hintere Spitze als vogelschnabelartige Facetterear tip as bird's beak-like facet
Claims (5)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2877580A1 (en) * | 2004-11-10 | 2006-05-12 | Gambro Lundia Ab | PLASTIC CANNULA |
Citations (7)
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 |
-
1995
- 1995-08-30 DE DE29513988U patent/DE29513988U1/en not_active Expired - Lifetime
Patent Citations (7)
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)
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 |