Summary of the invention
A kind of paracentesis pericardii needle assembly, comprise sleeve pipe, seal wire and puncture needle, described puncture needle extends in described sleeve pipe, and its far-end is band needle point structure; Described seal wire extends in described sleeve pipe, and described seal wire is made up of highly elastic material, comprises far-end and near-end, and the far-end of described seal wire is curved distal tune, and described curved distal tune is formed by described seal wire is bending, and its end is sharp structure; The near-end of described seal wire is provided with seal wire localizer.
According to a kind of detailed description of the invention of the present invention, described sleeve pipe comprises inner sleeve and trocar sheath, and described inner sleeve is free to slide in described trocar sheath.
Preferably, the distal port of the distal port of described inner sleeve and trocar sheath at grade.
Preferably, the far-end of described sleeve pipe is blunt nosed structure, if described sleeve pipe comprises inner sleeve and trocar sheath, then preferably, the far-end of described trocar sheath is blunt nosed structure.
According to a kind of detailed description of the invention of the present invention, described seal wire localizer is dismountable to be fixed on described seal wire; When seal wire pushed forward, described seal wire localizer clamping is fixed on the near-end of described sleeve pipe; Preferably, the near-end of described sleeve pipe is fixed with joint, and when seal wire pushed forward, described seal wire localizer clamping is fixed on the near-end of described joint.
The plane at curved distal tune place of described seal wire and the distal port planar process of sleeve pipe between there is certain angle α, described angle α is 0 or 180 degree.
After described seal wire localizer clamping is fixed on the near-end of described sleeve pipe, the sharp structure of described wire distal extend out to described jacket exterior.
According to a kind of detailed description of the invention of the present invention, be no more than from tip in the length range of 3mm at the curved distal tune place of described seal wire, the angle that described tip turns over is at least 90 degree.Preferably, in the length range of curved distal tune place 1-2mm from tip of described seal wire, the angle that described tip turns over is at least 90 degree.
After described curved distal tune extend out to described jacket exterior, its bending is involute shape or zigzag shape or irregular bending.
In a preferred embodiment of the invention, described paracentesis pericardii needle assembly, when puncturing to pericardium, can reduce the damage to tissue.
Detailed description of the invention
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail, but the present invention is not limited only to the following examples.
Shown in Fig. 1 is the structural representation of a kind of preferred paracentesis pericardii needle assembly 10 of the present invention, and shown in Fig. 2 is the enlarged drawing at D place in Fig. 1.As depicted in figs. 1 and 2, described paracentesis pericardii needle assembly 10 comprises puncture needle 12 and sleeve pipe 18, and described puncture needle 12 extends in sleeve pipe 18.Described puncture needle 12 comprises far-end and near-end, can be made up, as stainless steel material or nickel-titanium alloy material of the material of any suitable biocompatibility.The far-end of described puncture needle 12 is the structures with needle point, can puncture to thoracic wall.The far-end of described sleeve pipe 18 is blunt nosed structure, and namely the far-end of described sleeve pipe 18 can be rounding off face with the face of contact tissue, to guarantee that all tissues of contacting with sleeve pipe 18 or organ can not be scratched.Be fixed with joint 14 in the proximal end of described sleeve pipe 18, described joint 14 can be female Luer.
Shown in Fig. 3 is the sectional view of the paracentesis pericardii needle assembly shown in Fig. 1, shows the internal structure of the paracentesis pericardii needle assembly of the preferred embodiment of the present invention.When the far-end of described puncture needle 12 punctures after thoracic wall enters thoracic cavity, it is exited in sleeve pipe 18, and seal wire 13 is pushed forward along sleeve pipe 18.
Described seal wire 13 extends in described sleeve pipe 18, and it can be free to slide in described sleeve pipe 18.Described seal wire 13 is elongated, flexible flexible structure, and it comprises curved distal tune 32; Described curved distal tune 32 is formed by described seal wire 13 is bending, and its end is sharp structure.Described seal wire 13 can be made up of any suitable highly elastic material, such as nickel-titanium alloy material, and described curved distal tune 32 is suitable for reverting to predetermined bending from straight configuration.Because described seal wire adopts highly elastic material to make, being straight configuration when making described curved distal tune 32 in described puncture needle 12, when passing in described puncture needle 12, predetermined bending can being returned to.Described curved distal tune 32 can be formed with described seal wire 13 one, also can split form.Described seal wire 13 can be solid construction, and its inside does not have cavity, also can be other suitable structure.The near-end of described seal wire 13 is fixed with seal wire localizer 34.
As shown in Figure 3, be no more than from tip in the length range of 3mm at the curved distal tune place of described seal wire 13, the angle that described tip turns over is at least 90 degree.Preferably, in the length range of curved distal tune place 1-2mm from tip of described seal wire, the angle that described tip turns over is at least 90 degree.
When the tip of described seal wire is through after pericardium, described tip towards described seal wire direction of propulsion between angle be greater than 90 degree, therefore not easily damage is caused to pericardium.Sharp structure of the present invention refers to that the tip of described seal wire turns over 90 degree and a part of seal wire in the length range being no more than 3mm, and the minimum profile curvature radius of its tip end surface is not more than 0.1mm.Described sharp structure comprises far-end and near-end, and tip of the present invention refers to the distal tip of described sharp structure, and it is very sharp, can be microcosmic spherical structure.
As shown in Figure 3, after described tip turns over 90 degree, the bending of described curved distal tune 32 from the proximal end of sharp structure can be zigzag shape, involute shape, also can be irregular bendings that other are applicable to, as the bending that circular arc is combined with straight line, involute is combined with straight line or other are suitable.When the bending of described curved distal tune 32 from the proximal end of sharp structure is zigzag shape, involute shape, its radius of curvature can be large in becoming large or steps change gradually; The bending of described curved distal tune 32 from the proximal end of sharp structure is irregular bending, during as circular arc is combined with straight line, involute is combined with straight line or other are suitable bending, the change of its radius of curvature also can be erratic, as can be large in becoming large or steps change gradually, but along with bending further of seal wire, its radius of curvature starts to diminish, and becomes large or steps change subsequently more gradually large.After the far-end of described curved distal tune 32 punctures pericardium, described tip towards described seal wire direction of propulsion between angle be greater than 90 degree, therefore can not puncture heart; Even if along with described curved distal tune 32 progresses into pericardium, the angle between the most advanced and sophisticated direction of propulsion towards seal wire is less than 90 degree, and now because seal wire is very long and soft, the power on seal wire cannot be delivered to tip, therefore, also not easily causes damage to heart.Described tip can be, within the solid of the bending being in described curved distal tune is surrounded, when puncturing, not easily cause damage to pericardium; Even if described tip is in outside the solid encirclement of the bending of described curved distal tune, because seal wire is very long and soft, the power on seal wire cannot be delivered to tip, therefore, also not easily causes damage to heart.Be no more than from tip in the length range of 3mm, described sharp structure comprises a bending section 323, and its radius of curvature is not more than 2mm.
Described curved distal tune 32 from sharp structure proximal end to the part of seal wire proximal extension can be cylindrical structural, its diameter can be set according to actual needs by those skilled in the art, in a preferred embodiment of the invention, its diameter is 0.2-1mm.Described curved distal tune 32 also can be laminated structure to the part of seal wire proximal extension from sharp structure proximal end, and its width is 0.2-1mm.
Described seal wire localizer 34 is dismountable to be fixed on described seal wire 13; When pushed forward seal wire, described seal wire localizer 34 clamping is fixed on the near-end of described joint 14, and the anglec of rotation between seal wire 13 and sleeve pipe 18 and relative position are fixed.By described seal wire localizer 34 before being fixed on seal wire 13, according to the needs in puncture direction, seal wire can be rotated, and then fixing.When described seal wire localizer 34 clamping is fixed on the near-end of described joint 14, the plane at curved distal tune 32 place of described seal wire and the distal port planar process of sleeve pipe 18 between there is certain angle α; Preferably, described angle α is 0 or 180 degree.When described seal wire localizer 34 clamping is fixed on the near-end of described joint 14, the sharp structure of described wire distal extend out to described jacket exterior, to guarantee the carrying out of puncturing.Seal wire localizer 34 in the present invention can be any suitable structure or shape, as long as the anglec of rotation between seal wire 13 and sleeve pipe 18 and relative position can be made to fix, can guarantee the carrying out of puncturing, all fall into scope of the present invention.
According to the present invention one preferred embodiment, described paracentesis pericardii needle assembly in use, puncture needle 12 punctures thoracic wall, enter thoracic cavity after, it is exited in sleeve pipe 18, by described seal wire 13 along sleeve pipe 18 pushed forward.When described curved distal tune 32 is all positioned at described puncture needle 12, described curved distal tune 32 is straight configuration.When seal wire described in pushed forward 13 time, the tip of described curved distal tune 32 is stretched out in the body of described sleeve pipe 18.Described tip punctures pericardium, and described seal wire 13 progresses into pericardium inside, and described curved distal tune 32 starts slowly to bend, and revert to reservation shape to it, puncture completes.
Shown in Fig. 4 is the structural representation of the paracentesis pericardii needle assembly of the preferred embodiment of the present invention.As shown in Figure 4, described paracentesis pericardii needle assembly 10 comprises trocar sheath 81 and inner sleeve 82, and described inner sleeve 82 can be free to slide in described trocar sheath 81.When described inner sleeve 82 pushed forward is to the far-end of trocar sheath 81, the distal port of described trocar sheath 81 and the distal port of inner sleeve 82 are at grade; To guarantee that the far-end of described trocar sheath 81 and inner sleeve 82 is when reclining pericardium, can not cause damage to pericardium, and guarantee the carrying out of puncture.Described trocar sheath 81 is blunt nosed structure, and described inner sleeve 82 can be blunt nosed structure, may not be blunt nosed structure.Described inner sleeve 82 be arranged so that the internal diameter of described sleeve pipe diminishes, guarantee described seal wire 13 puncture time, needle point puncture direction vertical as far as possible with the distal port plane of inner sleeve 82.The proximal end of described trocar sheath 81 is fixed with joint 14, and the near-end of described inner sleeve 82 is fixed with joint 11, and described joint 11 and joint 14 can be female Luer.
After the far-end of described puncture needle 12 punctures thoracic wall, enters thoracic cavity, it is exited in trocar sheath 81; Sent into by described inner sleeve 82 in described trocar sheath 81, described seal wire 13 extends in described inner sleeve 82; Also first described inner sleeve 82 can be sent in described trocar sheath 81, then again seal wire 13 be pushed forward along inner sleeve 82.Described seal wire 13 can be free to slide in described inner sleeve 82.The puncture direction of described seal wire is in the plane at curved distal tune 32 place of described seal wire 13.When described curved distal tune 32 is all positioned at described puncture needle 12, described curved distal tune 32 is straight configuration.When seal wire described in pushed forward 13 time, the tip of described curved distal tune 32 is stretched out in the body of described inner sleeve 82.Described tip punctures pericardium, and described seal wire 13 progresses into pericardium inside, and described curved distal tune 32 starts slowly to bend, and revert to reservation shape to it, puncture completes.
In embodiment shown in Fig. 4, all the other structures are with the embodiment shown in Fig. 1 to Fig. 3.
Embodiments of the present invention are not limited to described in above-described embodiment; when without departing from the spirit and scope of the present invention; those of ordinary skill in the art can make various changes and improvements to the present invention in form and details, and these are all considered to fall into protection scope of the present invention.