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CN101773404B - Magnetic resonance compatible puncture needle - Google Patents

Magnetic resonance compatible puncture needle Download PDF

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CN101773404B
CN101773404B CN2010100426044A CN201010042604A CN101773404B CN 101773404 B CN101773404 B CN 101773404B CN 2010100426044 A CN2010100426044 A CN 2010100426044A CN 201010042604 A CN201010042604 A CN 201010042604A CN 101773404 B CN101773404 B CN 101773404B
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needle
magnetic resonance
pin
outer casing
puncture needle
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CN101773404A (en
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刘新
邱本胜
郑海荣
孙素明
邹超
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Shenzhen Institute of Advanced Technology of CAS
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Shenzhen Institute of Advanced Technology of CAS
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Abstract

The invention relates to a magnetic resonance compatible puncture needle which comprises an outer needle and an inner needle, wherein the inner needle is embedded in the outer needle, the outer needle is made of pure titanium, and the inner needle is made of titanium alloy, the outer needle comprises an outer needle handle and an outer sleeve needle connected to the outer needle handle, the inner needle comprises an inner needle handle and an inner needle core connected to the inner needle, the outer needle handle is provided with a notch, and the outer sleeve needle is provided with a middle hole communicated with the notch, and the outside diameter of the outer sleeve needle is less than the inside diameter of the notch; the inner needle handle comprises an outer end part and a needle fixing part connected to the outer end part, the needle fixing part is used for mounting the inner needle core, the outside diameter of the inner needle core is less than the inside diameter of the middle hole of the outer sleeve needle, the outer end part is abutted with the end part of the outer needle handle; the magnetic resonance compatible puncture needle also comprises a diamagetism layer arranged on the outer sleeve needle. The magnetic resonance compatible puncture needle reduces the size of the puncture needle under magnetic resonance imaging and is convenient for better judging the position of the puncture needle.

Description

Magnetic resonance compatible puncture needle
[technical field]
The present invention relates to a kind of medical apparatus and instruments, particularly a kind of magnetic resonance compatible puncture needle.
[background technology]
Puncture needle is the most basic intervention apparatus, can be used for directly penetrating doing suction, flushing, drain, biopsy in tumor or the blister cavities or Clinics and Practices such as melting; Also can be used for opening the passage or the tissues such as cranium brain, bile duct, urinary tract, stomach, vomica and blister cavities of skin and blood vessel, introduce seal wire, conduit, drainage tube etc. then and treat.The tradition puncture needle is widely used in medical domain, but uses limited in the magnetic resonance guiding gets involved.The magnetic resonance guiding gets involved and is meant based on Image Diagnosis, under the guiding of magnetic resonance equipment, utilize percutaneous puncture technology and microcatheter technology etc., some diseases is treated or in order to obtain histology, bacteriology, physiology and biochemical material, with clear and definite lesion nature.This technology has characteristics such as no ionizing radiation, Wicresoft, treatment be accurate, is one of clinical medical latest development.
Under the strong magnetic field circumstance of magnetic resonance, because the puncture needle material is generally metal material, belong to paramagnetic material, therefore under nuclear magnetic resonance, can produce pseudo-shadow.The magnetic resonance compatibility of puncture needle is mainly reflected in the size of image artifacts.The puncture needle that the tradition stainless steel material is made will be subjected to huge magnetic field force and moment, can't use.And the puncture needle of novel low susceptibility material though institute is magnetic field force induced and moment is very little, aspect imaging, have pseudo-shadow, and pseudo-shadow increases along with the increase of field intensity.Excessive pseudo-shadow will directly influence the judgement of surgeon to tip position, and then influence operative treatment.
[summary of the invention]
Based on this, be necessary to provide a kind of magnetic resonance compatible puncture needle that can reduce the image artifacts size.
A kind of magnetic resonance puncture needle comprises outer pin and interior pin, and described interior pin embeds described outer pin, and described outer pin is pure titanium, and described interior pin is a titanium alloy.
Preferably, described outer pin comprises outer pin handle and the outer casing needle that links to each other with described outer pin handle, pin handle and the interior nook closing member that links to each other with described interior pin in pin comprises in described, described outer pin handle is provided with hand-hole, described outer casing needle is provided with mesopore, described hand-hole communicates with described mesopore, and the external diameter of described outer casing needle is less than described hand-hole internal diameter; The pin handle comprises outer end and the solid pin portion that links to each other with described outer end in described, described solid pin portion be used to install described in nook closing member, described interior nook closing member external diameter is less than described outer casing needle mesopore internal diameter, the end of described outer end and described outer pin handle connects.
Preferably, described magnetic resonance puncture needle also comprises the diamagnetism layer, and described diamagnetism layer is arranged on the described outer casing needle.
Preferably, the thickness of described diamagnetism layer should satisfy formula:
Figure G2010100426044D00021
Wherein, d1 is interior nook closing member diameter; D2 is the outer casing needle internal diameter; D3 is the outer casing needle external diameter; T is the diamagnetism layer thickness; χ 1Susceptibility for interior nook closing member material; χ 2Susceptibility for the outer casing needle material; χ 3Susceptibility for additional diamagnetic material.
Preferably, described diamagnetism layer is a bismuth metal.
Preferably, described outer casing needle syringe needle is provided with the sharpening face of inclination.
Preferably, described sharpening face comprises the first sharpening face and the second sharpening face, and the axial line of the first sharpening face and described outer casing needle forms angle theta 1, the axial line of the second sharpening face and described outer casing needle forms angle theta 2
Preferably, sharpening face in described interior nook closing member syringe needle is provided with, the angle theta that the axial line of interior sharpening face and described interior nook closing member forms 3, and angle theta 1, θ 3, θ 2, reduce successively.
Preferably, described angle theta 1, θ 2Scope be 10 the degree to 45 the degree.
Preferably, described outer casing needle is provided with calibration loop, and described calibration loop comprises one division ring and double scale ring.
Above-mentioned magnetic resonance puncture needle outer casing needle adopts pure titanium material, and interior nook closing member adopts titanium alloy material, has cut down the pseudo-shadow size of puncture needle under nuclear magnetic resonance, is convenient to preferably the puncture needle position be judged.
Employing is provided with the diamagnetism layer on outer casing needle, cut down the pseudo-shadow size under the nuclear magnetic resonance more, better judges the position of puncture needle.
The outer casing needle syringe needle adopts the molding of secondary sharpening, forms two sharpening angles, reduces the wound that in the piercing process tissue caused, the probability of reduction complication.Angular range adopts 10 to spend between 45 degree the resistance that reduces to puncture.
Calibration loop is set on the outer casing needle, adopts one division ring and the bonded form of double scale ring, can see the scale situation and judge the degree of depth of magnetic resonance puncture needle more accurately and the position of needle point in any angle, it be convenient to calculate depth of needle.
[description of drawings]
Fig. 1 is a magnetic resonance compatible puncture needle overall structure profile among the embodiment;
Fig. 2 is a magnetic resonance compatible puncture needle structure partial profile among the embodiment;
Fig. 3 A is the outer needle construction profile of magnetic resonance compatible puncture needle among the embodiment;
Fig. 3 B is the interior needle construction profile of magnetic resonance compatible puncture needle among the embodiment;
Fig. 4 A is the outer pin needle head structure part section enlarged drawing of magnetic resonance compatible puncture needle among the embodiment;
Fig. 4 B is the interior pin needle head structure part section enlarged drawing of magnetic resonance compatible puncture needle among the embodiment;
Fig. 5 is the outer pin side structure sketch map of the band scale of magnetic resonance compatible puncture needle among another embodiment.
[specific embodiment]
Shown in Fig. 1, Fig. 2, Fig. 3 A and Fig. 3 B, a kind of magnetic resonance compatible puncture needle comprises outer pin 1 and interior pin 2, and outer pin 1 is inserted in interior pin 2 in it.
Outer pin 1 comprises outer pin handle 10 and outer casing needle 12, outer casing needle 12 and outer 10 gluing linking to each other of pin handle.
Pin handle 20 and interior nook closing member 22 in interior pin 2 comprises, interior pin handle 20 and interior 22 gluing linking to each other of nook closing member.
Outer casing needle 12 and interior nook closing member 22 all adopt the magnetic resonance compatible material, and the magnetic resonance puncture needle should select susceptibility to approach tissue on the basis of physical parameter such as intensity, hardness and biocompatibility requirement as far as possible.Outer casing needle 12 is elected pure titanium as, and the pure titanium trade mark can be TA1, TA2, TA3 or TA4 (etc.; Interior nook closing member 22 is elected titanium alloy as, and the titanium alloy trade mark can be TC4, TA18 (being mainly Ti-3Al-2V) etc., and these trades mark are to implant the trade mark that titanium standard (as GB/T13810-2007) is divided according to surgery.Pure titanium and titanium alloy material are in magnetic resonance environment, and stressed, heating, pseudo-shadow degree are all very little, help judging that magnetic resonance puncture needle tip position increases the probability of success of intervene operation.
In the outer pin handle 10 hand-hole 100 is arranged, mesopore 120 is arranged in the outer casing needle 12, hand-hole 100 communicate with mesopore 120 and the external diameter of outer casing needle 12 less than the internal diameter of hand-hole 100.
Interior pin handle 20 comprises outer end 200 and the solid pin portion 202 that links to each other with the outer end.Be convenient to install and fix interior nook closing member 22 Gu establish the hole in the pin portion 202, and solid pin portion 202 can embed in the hand-hole 100 of outer pin handle 10.Outer end 200 connects with the end of outer pin handle 10.The external diameter of interior nook closing member 22 can embed in the mesopore 120 less than the internal diameter of the mesopore 120 in the outer casing needle 12.
Among one embodiment, above-mentioned magnetic resonance compatible puncture needle also comprises diamagnetism layer 3, and diamagnetism layer 3 is arranged on the surface of outer casing needle 12, is used to subdue the influence that the magnetic resonance puncture needle is subjected to magnetic field, thereby reduces the size of pseudo-shadow.Diamagnetism layer 3 can cover the surface of outer casing needle 12 by modes such as plating.The material of diamagnetism layer 3 is metal material or nonmetallic materials, and the diamagnetism layer material is a bismuth metal in the present embodiment, and puncture needle is cylindrical.The thickness of diamagnetism layer 3 should satisfy following formula:
Figure G2010100426044D00041
Wherein, d1 is interior nook closing member diameter;
D2 is the outer casing needle internal diameter;
D3 is the outer casing needle external diameter;
T is the diamagnetism layer thickness;
χ 1Susceptibility for interior nook closing member material;
χ 2Susceptibility for the outer casing needle material;
χ 3Susceptibility for additional diamagnetic material.
Be calculated as follows for example: unit is millimeter (mm)
d1＝1mm，d2＝1.2mm，d3＝1.35mm，χ 1＝χ 2＝1.82×10 -6，χ 3＝-164×10 -6
The substitution formula can get the diamagnetism layer thickness and should be: t=0.24mm.
Among another embodiment, shown in Fig. 4 A and Fig. 4 B, the outer casing needle syringe needle of above-mentioned magnetic resonance puncture needle is provided with the sharpening face of inclination, and this sharpening face adopts the molding of secondary sharpening, the magnetic resonance puncture needle of Xing Chenging will reduce the infringement of tissue in piercing process like this, and then reduce the probability of complication.This sharpening face comprises the first sharpening face 13 and the second sharpening face 14.The first sharpening face 13 is θ with the angle of the axial line formation of outer casing needle 12 1, the second sharpening face 14 is θ with the angle of the axial line formation of outer casing needle 12 2Angle theta 1And θ 2Magnitude range be that 10 degree are to 45 degree, and θ 1Greater than θ 2Interior nook closing member 22 syringe needles are provided with interior sharpening face 24, and interior sharpening face 24 is θ with the angle of the axial line formation of interior nook closing member 22 3The size of these three angles should satisfy θ 1＞θ 3＞θ 2In the present embodiment, θ 1Be 25 degree, θ 2Be 16 degree, θ 3Be 20 degree.
Among another embodiment, as shown in Figure 5, the outer casing needle 12 of above-mentioned magnetic resonance puncture needle is provided with calibration loop.This calibration loop comprises one division ring 121 and double scale ring 122.The double scale ring is set makes the doctor can know the magnetic resonance puncture needle degree of depth and tip position more accurately, be convenient to the operation that better undergos surgery.Among one embodiment, be benchmark, beat the one division ring, beat the double scale ring every 50mm every 10mm with the needle point.The one division ring width is 0.5mm, and the double scale ring is made up of two one division rings at a distance of 0.5mm.
The processing method that above-mentioned magnetic resonance puncture needle surface is provided with the diamagnetism layer can be used for other magnetic resonance compatible apparatuses.
Above-mentioned magnetic resonance puncture needle outer casing needle adopts pure titanium material, and interior nook closing member adopts titanium alloy material, has cut down the pseudo-shadow size of puncture needle under nuclear magnetic resonance, is convenient to preferably the puncture needle position be judged.
Employing is provided with the diamagnetism layer on outer casing needle, cut down the pseudo-shadow size under the nuclear magnetic resonance more, better judges the position of puncture needle.
The outer casing needle syringe needle adopts the molding of secondary sharpening, forms two sharpening angles, reduces the wound that in the piercing process tissue caused, the probability of reduction complication.Angular range adopts 10 to spend between 45 degree the resistance that reduces to puncture.
Calibration loop is set on the outer casing needle, adopts one division ring and the bonded form of double scale ring, can see the scale situation and judge the degree of depth of magnetic resonance puncture needle more accurately and the position of needle point in any angle, it be convenient to calculate depth of needle.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to this utility model claim.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

Claims (8)

1. a magnetic resonance puncture needle comprises outer pin and interior pin, and described interior pin embeds described outer pin, it is characterized in that described outer pin is pure titanium, and described interior pin is a titanium alloy; Described outer pin comprises outer pin handle and the outer casing needle that links to each other with described outer pin handle, pin handle and the interior nook closing member that links to each other with described interior pin in pin comprises in described, described outer pin handle is provided with hand-hole, described outer casing needle is provided with mesopore, described hand-hole communicates with described mesopore, and the external diameter of described outer casing needle is less than described hand-hole internal diameter; The pin handle comprises outer end and the solid pin portion that links to each other with described outer end in described, described solid pin portion be used to install described in nook closing member, described interior nook closing member external diameter is less than described outer casing needle mesopore internal diameter, the end of described outer end and described outer pin handle connects; Described magnetic resonance puncture needle also comprises the diamagnetism layer, and described diamagnetism layer is arranged on the described outer casing needle.
2. magnetic resonance puncture needle according to claim 1 is characterized in that, the thickness of described diamagnetism layer should satisfy formula:
Figure FSB00000487775100011
Wherein, d1 is interior nook closing member diameter; D2 is the outer casing needle internal diameter; D3 is the outer casing needle external diameter; T is the diamagnetism layer thickness; x 1Susceptibility for interior nook closing member material; x 2Susceptibility for the outer casing needle material; x 3Susceptibility for additional diamagnetic material.
3. magnetic resonance puncture needle according to claim 1 is characterized in that, described diamagnetism layer is a bismuth metal.
4. according to each described magnetic resonance puncture needle in the claim 1 to 3, it is characterized in that described outer casing needle syringe needle is provided with the sharpening face of inclination.
5. magnetic resonance puncture needle according to claim 4 is characterized in that, described sharpening face comprises the first sharpening face and the second sharpening face, and the axial line of the first sharpening face and described outer casing needle forms angle theta 1, the axial line of the second sharpening face and described outer casing needle forms angle theta 2
6. magnetic resonance puncture needle according to claim 5 is characterized in that, sharpening face in described interior nook closing member syringe needle is provided with, the angle theta that the axial line of interior sharpening face and described interior nook closing member forms 3, and angle theta 1, θ 2, θ 3, reduce successively.
7. magnetic resonance puncture needle according to claim 6 is characterized in that, described angle theta 1, θ 2Scope be 10 the degree to 45 the degree.
8. according to each described magnetic resonance puncture needle in the claim 1 to 3, it is characterized in that described outer casing needle is provided with calibration loop, described calibration loop comprises one division ring and double scale ring.
CN2010100426044A 2010-01-05 2010-01-05 Magnetic resonance compatible puncture needle Active CN101773404B (en)

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CN104473677B (en) * 2014-12-23 2016-08-17 东南大学 A kind of puncture needle of band magnetic grid scale
CN106691548A (en) * 2015-07-20 2017-05-24 李成利 Magnetic resonance compatibility puncture needle
CN105664352B (en) * 2015-11-18 2019-11-05 珠海和佳医疗设备股份有限公司 A kind of electromagnetic location navigation seeds implanted trocar for intervening operation
CN106974731B (en) * 2017-05-03 2019-07-26 西安交通大学医学院第二附属医院 Ligament reconstructive bone road based on 3D printing technique is accurately positioned holdfast and localization method
CN106943196B (en) * 2017-05-03 2019-06-21 西安交通大学医学院第二附属医院 The universal positioning holdfast of one kind and its application method

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