CN209074692U - A kind of donor source needle - Google Patents

Abstract

The utility model discloses a kind of donor source needle, including inner core and outer tube, inner core is solid steel needle, and the needle point of inner core is Mitsubishi's shape, and the angle of each face of needle point and inner core center line is less than 30 °；Inner core end is fixed with the first plastic fixtures, and outer pipe end is provided with the second plastic fixtures；The flattening of inner core end is in trapezoidal that trapezoidal end is wider than trapezoidal front end；Inner core and the first plastic fixtures coupling part are additionally provided with fixing groove, and fixing groove is the groove being arranged along inner core length direction, and fixing groove is arranged lower than core surface；First plastic fixtures include integrated inner casing and shell, and inner casing is tubulose, and inner housing inner is fixed in inner core, and annular recess is formed between inner casing, shell；Outer tube is hollow steel pipe, and for outer tube sleeve on the outside of inner core, outer tube front end is shorter than inner core；Outer tube front end is curved to the inside；Outer pipe end is shorter than inner core；The utility model tip generates smaller cutting sense, and the pain sensation is lighter when making to puncture.

Description

A kind of donor source needle

Technical field

The utility model relates to the field of medical instrument technology more particularly to a kind of donor source needles.

Background technique

Puncture needle is a kind of common medical instrument, can be used to puncture organ, tissue, and acquire tissue by negative pressure drainage Or organ sample.

General donor source needle includes inner core and outer tube two parts, and wherein inner core is solid steel needle, and tip is sharp, For puncturing tissue of patient, outer tube is coated on the hollow steel pipe outside inner core, and outer tube front end is slightly shorter than inner core；It is specified puncturing to reach Behind position, inner core is extracted out from outer tube, carries out drainage acquisition.

The needle point of the donor source needle of existing clinical use, inner core is beveled edge, not can be carried out effective cutting not only, Very big pain is caused to patient simultaneously.

In addition, the end of inner core and outer tube need and plastic part fix, generally using inner core with plastic part integrated through injection molding Forming still not can guarantee the firm fixation in steel needle part and plastic part part still in this way.

Utility model content

In order to solve shortcoming present in above-mentioned technology, the utility model provides a kind of donor source needle.

In order to solve the above technical problems, the technical solution adopted in the utility model is: a kind of donor source needle, including it is interior Core and outer tube, the inner core are solid steel needle, and the needle point of inner core is Mitsubishi's shape, and each face of needle point and the angle of inner core center line are small In 30 °；

The inner core end is fixed with the first plastic fixtures, and outer pipe end is provided with the second plastic fixtures；

The inner core end flattening is in trapezoidal that the trapezoidal end is wider than trapezoidal front end；The inner core and the first modeling Material fixing piece coupling part is additionally provided with fixing groove, and the fixing groove is the groove being arranged along inner core length direction, the fixing groove It is arranged lower than core surface；

First plastic fixtures include integrated inner casing and shell, and the inner casing is tubulose, and inner housing inner is in inner core It is fixed, annular recess is formed between inner casing, shell；

The outer tube is hollow steel pipe, and for outer tube sleeve on the outside of inner core, outer tube front end is shorter than inner core；The outer tube front end to Interior lateral bend；Outer pipe end is shorter than inner core；

Second plastic fixtures are made of transparent plastic, and the second plastic fixtures are according to shape with function difference by preceding It is divided into fixed section, stress section and Drainage Section after, the fixed section is hollow cylinder, outer pipe end is fixed inside fixed section, Hollow tube body is formed inside stress section and Drainage Section to communicate with outer tube, is rectangular cylinder on the outside of the stress section, surface is set It is equipped with anti-skid chequer；The Drainage Section is hollow cylinder, is fastened in the annular recess of the first plastic fixtures.

Further, the outer tube front end is provided with development zone, and the development zone is that one section of rough surface is arranged in outer pipe surface It is formed.

Further, the development zone is that sandblasting layer composition is arranged in outer pipe surface.

Further, the development zone is that the fine thread face of outer pipe surface setting is constituted.

Further, the development zone is that the spot corrosion layer of outer pipe surface setting is constituted.

Further, the outer pipe surface is provided with scale.

The utility model provides a kind of donor source needle, sets three prismatic, and strict control three for the needle point of inner core The gradient of faceted pebble keeps tip sharper, and generates smaller cutting sense, and the pain sensation is lighter when making to puncture；Meanwhile by its end The change of structure increases its pulling capacity, prevents plastic fixtures from disengaging.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the donor source needle of the utility model.

Fig. 2 is the structural schematic diagram of inner core.

Fig. 3 is the side view of inner core end.

In figure: 1, inner core；2, outer tube；3, the first plastic fixtures；4, the second plastic fixtures；5, development zone；6, needle point； 7, fixing groove；8, Drainage Section；9, stress section；10, fixed section.

Specific embodiment

Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.

A kind of donor source needle shown in Fig. 1~3, including inner core 1 and outer tube 2, the inner core 1 are solid steel needle, inner core 1 Needle point 6 be Mitsubishi's shape, the angle of each face of needle point 6 and 1 center line of inner core can reduce pain when insertion less than 30 ° in this way Sense；The outer tube 2 is hollow steel pipe, and for outer tube sleeve on the outside of inner core, outer tube front end is shorter than inner core；The outer tube front end is inwardly Bending；Outer pipe end is shorter than inner core.1 end of inner core is fixed with the first plastic fixtures 3, and outer pipe end is provided with the second modeling Expect fixing piece 4.

1 end of the inner core flattening is in trapezoidal that the trapezoidal end is wider than trapezoidal front end；The inner core 1 and first 3 coupling part of plastic fixtures is additionally provided with fixing groove 7, and the fixing groove 7 is the groove being arranged along inner core length direction, described solid Determine slot 7 to be arranged lower than 1 surface of inner core；

First plastic fixtures 3 include the inner casing and shell of one, and the inner casing is tubulose, and inner housing inner is in inner core It is fixed, annular recess is formed between inner casing, shell；

Second plastic fixtures 4 are made of transparent plastic, the second plastic fixtures 4 according to shape and function difference by Front to back is divided into fixed section 10, stress section 9 and Drainage Section 8, and the fixed section 10 is hollow cylinder, fixes inside fixed section 10 2 end of outer tube, for fixing outer tube；Hollow tube body is formed inside stress section 9 and Drainage Section 8 to communicate with outer tube 2, can be used for Drainage；It is rectangular cylinder on the outside of the stress section 9, surface is provided with anti-skid chequer, for holding；The Drainage Section 8 is hollow Cylinder, be fastened in the annular recess of the first plastic fixtures, can be connect with drainage bottle or needle tubing.

2 front end of outer tube is provided with development zone 5, and the development zone 5 is that outer pipe surface one section of rough surface of setting is formed；Rough surface For sandblasting layer, fine thread face or spot corrosion layer；Outer pipe surface is provided with scale.

Above embodiment is not limitations of the present invention, and the utility model is also not limited to the example above, The variations, modifications, additions or substitutions that those skilled in the art are made within the scope of the technical solution of the utility model, Also the protection scope of the utility model is belonged to.

Claims (6)

1. a kind of donor source needle, including inner core (1) and outer tube (2), it is characterised in that: the inner core (1) is solid steel needle, interior The needle point (6) of core (1) is Mitsubishi's shape, and the angle of needle point (6) each face and inner core (1) center line is less than 30 °；

Inner core (1) end is fixed with the first plastic fixtures (3), and outer tube (2) end is provided with the second plastic fixtures (4)；

Inner core (1) the end flattening is in trapezoidal that the trapezoidal end is wider than trapezoidal front end；The inner core (1) and first Plastic fixtures (3) coupling part is additionally provided with fixing groove (7), and the fixing groove (7) is recessed to be arranged along inner core (1) length direction Slot, the fixing groove (7) are arranged lower than inner core (1) surface；

First plastic fixtures (3) include integrated inner casing and shell, and the inner casing is tubulose, and inner housing inner is in inner core (1) fixed, annular recess is formed between inner casing, shell；

The outer tube (2) is hollow steel pipe, and outer tube (2) covers on the outside of inner core (1), and outer tube (2) front end is shorter than inner core (1)；Institute Outer tube (2) front end is stated to be curved to the inside；Outer tube (2) end is shorter than inner core (1)；

Second plastic fixtures (4) are made of transparent plastic, the second plastic fixtures (4) according to shape and function difference by It is hollow cylinder, fixed section that front to back, which is divided into fixed section (10), stress section (9) and Drainage Section (8), the fixed section (10), (10) internal to fix outer tube (2) end, hollow tube body, which is formed, inside stress section (9) and Drainage Section (8) communicates with outer tube (2), It is rectangular cylinder on the outside of the stress section (9), surface is provided with anti-skid chequer；The Drainage Section (8) is hollow cylinder, engaging In the annular recess of the first plastic fixtures (3).

2. donor source needle according to claim 1, it is characterised in that: outer tube (2) front end is provided with development zone (5), the development zone (5) is that outer tube (2) surface one section of rough surface of setting is formed.

3. donor source needle according to claim 2, it is characterised in that: the development zone (5) is the setting of outer tube (2) surface Sandblasting layer is constituted.

4. donor source needle according to claim 2, it is characterised in that: the development zone (5) is the setting of outer tube (2) surface Fine thread face constitute.

5. donor source needle according to claim 2, it is characterised in that: the development zone (5) is the setting of outer tube (2) surface Spot corrosion layer constitute.

6. donor source needle according to claim 1, it is characterised in that: outer tube (2) surface is provided with scale.