摘要:
The invention relates to a micro needle (1) for transporting fluid across or into a biological barrier. The micro needle comprises a shaft (2) having a hollow channel (3) ending in a tip (4) having a bevel at a predetermined angle. According to the invention the shaft is provided with an indentation (5) starting at the tip and running in longitudinal direction over a part of the outer surface having the shortest shaft length such that the channel has an unround cross section in the tip region. The invention further relates to a method for producing a micro needle according to the invention.
摘要:
A method of mechanically treating alloy metal surgical needles to improve bending strength is disclosed. The needles are curved and reverse-curved in this method to improve bending strength.
摘要:
Bei einem Verfahren zur Herstellung einer in Körpergewebe einstechbaren Mikronadel (12), bei welchem eine Nadelspitze (20) und ein vorzugsweise kapillarer Sammelkanal (14) für Köperflüssigkeit geformt wird, ist es vorgesehen, dass zumindest ein Teil eines aus einem Flachmaterial vorgefertigten Vorformlings (38) zu einer Rohrstruktur (22) umgeformt wird, so dass der Sammelkanal (14) im Bereich der Rohrstruktur (22) zumindest im Wesentlichen ringförmig geschlossen wird.
摘要:
A method is provided for forming a feature on a needle. In particular, a hollow, metal cannula (10) has a first end, a second end and a substantially constant outer diameter extending over at least a portion of its length. An annular metal sleeve (40) is provided that has a proximal shoulder and a distal shoulder. The length of the annular sleeve is less than the length of the constant diameter portion of the cannula. The sleeve has an inner diameter approximately equal to or less than the outer diameter of the constant diameter portion of the cannula. Two edges extend axially along the length of the sleeve, from the proximal shoulder to the distal shoulder, thereby defining a slit. The sleeve is positioned on the cannula at the constant outer diameter portion in an interference fit. An additional mechanical junction is provided to secure the sleeve to the cannula. For example, the sleeve may be welded to the cannula using a laser welder at at least one edge of the sleeve near one of either the proximal face or the distal face. Alternatively and additionally, the sleeve may be crimped or glued to the cannula. In accord with another aspect of this invention, a needle is provided made in accord with this method.
摘要:
A disposable needle for syringes and infusions includes a tubular needle body (1), one end of which consists of a pyramid needle tip (2), a conical needle tip (4) or the combination of a pyramid needle tip and a conical needle tip, a through-hole(3) communicating with the inner hole of the needle body (1) is provided on the tubular needle body (1) and the conical needle tip (4), or on the other part. The said conical needle tip (4) is solid, hollow or locally hollow. A manufacture of the said needle is also provided.
摘要:
A method of manufacturing microneedles is provided, the method comprising (i) depositing a substance onto a first surface and (ii) forming a solid needle-like shape from the substance. The substance may be deposited in non-solid form and subsequently solidified. A method of providing an array of such microneedles is also described.