CN200942227Y

CN200942227Y - Noninvasive medical needle

Info

Publication number: CN200942227Y
Application number: CN 200620119461
Authority: CN
Inventors: 杨昌燕; 赵伟; 卞恩淮; 杨昌林; 杨昌鹤
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-09-12
Filing date: 2006-09-12
Publication date: 2007-09-05
Anticipated expiration: 2016-09-12

Abstract

The utility model discloses a non-invasive medical needle, including a needle slim tube. The needle slim tube has an inclined section surface forming the needle tip, the section surface has an inside sharp opening and an outer sharp opening, and the inner sharp opening of 60-70% region of the rear end of the inclined section surface presents a round angle. On the base of the original needle structure, the utility model enables the original invasive area to present a shape with a sharp outside and a round inside, keeps the original needle insertion smoothness, and ensures that the inner round opening can't concern human tissue, therefore creating a real non-invasive operation, not adding needle insertion resistance and not influencing the needle fluid flow quantity.

Description

A kind of non-inner-wound medical needle

Technical field

This utility model relates to medical apparatus and instruments, and particularly a kind of medical needle especially a kind ofly can not won the various tissues of human body and then human body is brought dysgenic syringe needle in injection inserting needle process.

Background technology

As everyone knows, injection needle uses in medical field in a large number, and syringe needle is as the device that directly contacts with human body, and its design, processing ought to be perfect, should reduce to minimum to the harm of human body.

Existing injecting head structure, normally process with the rustless steel tubule, wherein a kind of structure is referring to shown in Figure 1, this injection needle work in-process, one termination of rustless steel tubule 10 forms first inclined-plane 11 with cutting for the first time, on the basis on first inclined-plane 11, form second cambered surface 12 at about 30～40% positions of the front end on first inclined-plane 11 then by cutting for the second time, because rustless steel tubule 10 has certain thickness, by twice cutting, the inwall of needle point liquid outlet rustless steel tubule can form cutting edge of a knife or a sword mouth 13 in the needle point inserting needle, and the outer wall of tubule then forms needle point inserting needle external-open cutting edge of a knife or a sword mouth 14.

When the syringe needle of this structure is used to have an injection blood transfusion and infusion, with second cambered surface 12, first inclined-plane, the 11 puncture tissue intravasations of needle point, rely on the outer cutting edge of a knife or a sword mouth 14 of its needle point to break tissue successively, guarantee that medicinal liquid flows into the blood vessel from rustless steel tubule 10 inwalls.In the inserting needle operation, 12 pairs of human bodies of second cambered surface do not have interior wound, and are staggered to form splitter between the interior cutting edge of a knife or a sword mouth 13 on first inclined-plane 11 and the external-open cutting edge of a knife or a sword mouth 14, referring to the P point that marks among Fig. 2, can extract the tissue that touches in the inserting needle process, wound surface in forming.

Vast amount of clinical is found, the conventional needles of disposable existing big model and various models is when having an injection transfusion and blood transfusion, absolutely can form wound surface in the injection, skin histology under the wound surface, muscular tissue, fatty tissue, and the vessel lumen tissue can be held in syringe needle and forms the granular or linear tissue debris of meat under the effect of cutting edge of a knife or a sword mouth 13, be pushed in the vessel lumen in the lump with liquid medicine, also may rest on a certain position with blood flow grows up, if enter in flowing to form in the narrow blood vessel to stop up and bring out thrombosis, and the chip that rests on the growth of a certain position may be grown up and be become optimum or malignant tumor, this shows that the trickle deficiency of syringe needle design all may be brought huge potential hazard to human body.

The utility model content

The purpose of this utility model is to overcome the above-mentioned defective of existing syringe needle, and a kind of medical needle that does not have interior wound is provided.

A kind of non-inner-wound medical needle that this utility model provides comprises a syringe needle tubule, and syringe needle tubule front end has a section that tilts and forms needle point, and section has interior cutting edge of a knife or a sword mouth and external-open cutting edge of a knife or a sword mouth, and the interior cutting edge of a knife or a sword mouth in 60～70% zones, described inclined cross section rear end is a fillet.

Above-mentioned non-inner-wound medical needle, section front end 30～40% zones of described inclination are cambered surface, rear end 60～70% is the inclined-plane.

Above-mentioned non-inner-wound medical needle, the section of described inclination are an inclined-plane.

Wherein, preferred, the interior cutting edge of a knife or a sword mouth in 70% zone, described inclined cross section rear end is a fillet.

Wherein, described interior cutting edge of a knife or a sword mouth fillet position is 3/4ths of a syringe needle tubule wall thickness.

This utility model adopts above technical scheme to have following advantage:

1, on the structure of original syringe needle, make original inner wound area form the form of outer sharp and iner round, the inserting needle that had both kept original syringe needle is smooth and easy, the mouth of circle can the connection tissue in guaranteeing again, real realize not having in wound;

2, do not increase the inserting needle resistance, do not influence pin discharge, improve the syringe needle of structure, patient's pain in the time of can alleviating inserting needle.

3, the processing of this utility model syringe needle is easy, and the conventional operation in conjunction with existing syringe needle processing only increases by one " correct grinding " operation, does not influence whole work flow, the operation smoothness; And precision grinding process can be finished in the of short duration time.

Description of drawings

Fig. 1 is the structure oblique view of existing intravenous injection needle;

Fig. 2 is the structural profile structure enlarged drawing of existing intravenous injection needle;

Fig. 3 is the oblique cutaway view Amplified image of interior wound needle head structure for this utility model does not have.

The processing sketch map of Fig. 4 interior wound syringe needle for this utility model does not have.

Fig. 5 is the another kind of radial cross-section of not having interior wound syringe needle of this utility model.

Fig. 6 is interior wound syringe needle combination syringe sketch map for this utility model does not have.

The specific embodiment

This utility model is on the basis that keeps existing syringe needle inserting needle structure, its deficiency is improved, thereby obtained a kind of medical needle that does not have interior wound.

By analysis and research to the existing structure syringe needle, be existing a kind of medical needle commonly used referring to Fig. 1 and Fig. 2, in its structure, there are first inclined-plane 11 and second cambered surface 12 to form the hatch region of needle point fluid, wherein second cambered surface 12 zone that surrounds accounts for 30～40% of total hatch region, and the zone that first inclined-plane 11 is surrounded accounts for 70～60% of total hatch region.Here, second cambered surface, 12 zones are wound district in not having, in the inserting needle process, second cambered surface 12 is used for puncture, can connection the tissue of contact, and in 11 zones, first inclined-plane, interior cutting edge of a knife or a sword mouth 13 and external-open cutting edge of a knife or a sword mouth 14 that the inside and outside wall of syringe needle steel pipe forms are used to scratch the tissue that touches, wound in wherein external-open cutting edge of a knife or a sword mouth 14 does not have, interior cutting edge of a knife or a sword mouth 13 is then because and be staggered to form splitter (referring to the P point that marks among Fig. 2) and win the tissue of contact in the inserting needle process between the external-open cutting edge of a knife or a sword mouth 14, wound in tissue is produced.

Improvement of the present utility model is interior cutting edge of a knife or a sword mouth 13 is polished, and makes it form interior circle structure, referring to shown in Figure 3.Among Fig. 3, second cambered surface, 12 zones still are wound district in not having, in 11 zones, first inclined-plane, wound in external-open cutting edge of a knife or a sword mouth 14 does not still have, staggered place (P point) then becomes arc transition and forms fillet between interior cutting edge of a knife or a sword mouth of creating in original 13 and the external-open cutting edge of a knife or a sword mouth 14, in the inserting needle process, can not win contact tissue like this, and can not cause interior wound tissue.Like this, 11 zones, first inclined-plane of the interior wound of nothing of the present utility model syringe needle just form the states of " outer sharp and iner round ".

Another kind of existing syringe needle only has an inclined-plane 15, referring to Fig. 5, in the hatch region on this inclined-plane 15,30% zone (referring to A district among Fig. 6) near needle point is no inner wound area, other 70% zone is wound district (referring to B district among Fig. 6) in having, then need cutting edge of a knife or a sword mouth 16 in wherein original is polished, form the state in 70% zone, rear end (B district) " outer sharp and iner round ".

For realizing creating syringe needle in the above-mentioned nothing, this utility model increases " correct grinding " operation together in the course of processing of original syringe needle.Promptly at syringe needle after essence dash to form inclined-plane and cambered surface (or an inclined-plane), use sharpener that the interior cutting edge of a knife or a sword mouth in 60～70% zones, syringe needle section needle point rear end (B district) is polished, referring to shown in Figure 4, sharpener comprises the bistrique 18 that can be controlled by precision, bistrique 18 should be fit to the syringe needle size, size is preferably less than syringe needle steel pipe section endoporus, use this bistrique 18, disposable (as in 1～5 second time) fast finishes polishing to the interior cutting edge of a knife or a sword mouth in 60～70% zones, needle point rear end (B district), generally grind off and be of a size of 1/4th of syringe needle tubule wall thickness, the cutting edge of a knife or a sword mouth is worn into fillet in being about to like this, and cutting edge of a knife or a sword mouth fillet position is 3/4ths of a syringe needle tubule wall thickness in that is to say.Through behind this precision grinding process, continue the subsequent handlings such as surface treatment, plating of original syringe needle again, thereby be processed into wound syringe needle in the nothing of the present utility model.

Claims

1, a kind of non-inner-wound medical needle comprises a syringe needle tubule, and the section that syringe needle tubule front end has inclination forms needle point, and section has interior cutting edge of a knife or a sword mouth and external-open cutting edge of a knife or a sword mouth, it is characterized in that: the interior cutting edge of a knife or a sword mouth in 60～70% zones, described inclined cross section rear end is a fillet.

2, non-inner-wound medical needle according to claim 1 is characterized in that, section front end 30～40% zones of described inclination are cambered surface, and rear end 60～70% is the inclined-plane.

3, non-inner-wound medical needle according to claim 1 is characterized in that, the section of described inclination is an inclined-plane.

According to claim 1 or 2 or 3 described non-inner-wound medical needles, it is characterized in that 4, the interior cutting edge of a knife or a sword mouth in 70% zone, described inclined cross section rear end is a fillet.

According to the described non-inner-wound medical needle of claim 4, it is characterized in that 5, described interior cutting edge of a knife or a sword mouth fillet position is 3/4ths of a syringe needle tubule wall thickness.