CN103892891A - Pericardium puncture needle component - Google Patents
Pericardium puncture needle component Download PDFInfo
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- CN103892891A CN103892891A CN201210582505.4A CN201210582505A CN103892891A CN 103892891 A CN103892891 A CN 103892891A CN 201210582505 A CN201210582505 A CN 201210582505A CN 103892891 A CN103892891 A CN 103892891A
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- seal wire
- puncture needle
- angle
- plane
- bending section
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3494—Trocars; Puncturing needles with safety means for protection against accidental cutting or pricking, e.g. limiting insertion depth, pressure sensors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00831—Material properties
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B2017/3454—Details of tips
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B2017/3454—Details of tips
- A61B2017/3458—Details of tips threaded
Abstract
The invention discloses a pericardium puncture needle component comprising a guide wire and a puncture needle. The guide wire extends in the puncture needle and comprises a far-end bent section and a near-end straight section, the far-end bent section is formed by bending of the guide wire, and the tail end of the far-end bent section is a pointed structure. The guide wire is made of a high-elasticity material, the far-end bent section of the guide wire is within a length range of 3mm from a point, and a turning angle of the point is at least 90 degrees. The puncture direction of the guide wire is in the normal direction of a point plane of the puncture needle, and is in a plane formed by a normal plane of the point plane and an axis of a puncture needle tube body. The pericardium puncture needle component can perform certain limit on degree of freedom of torsion of the guide wire when puncturing the pericardium.
Description
Technical field
The present invention relates to a kind of puncture needle assembly, relate to concretely a kind of paracentesis pericardii needle assembly.
Background technology
Pericardium is one deck connective tissue membrane structure that heart periphery is tightly wrapped in.Carrying out outside the heart in ablative surgery, handle that must be artificial is close to the pericardium of heart outer wall and is made a call to a path, so that ablation apparatus is entered between heart outer wall and pericardium and melted by this path.
Current existing paracentesis pericardii device shaped is various, as Chinese patent CN00257117.X discloses a kind of noinvasive Pericardiopuncture needle, comprises trocar sheath, nook closing member and end sealing cap; Described trocar sheath is the flexible sleeve pipe that has that is enclosed within nook closing member outside of interior sky, and nook closing member is solid puncture needle, is fixed on the end of trocar sheath by end sealing cap.Thrust after pericardium at nook closing member, nook closing member is exited, trocar sheath continues to be fed into pericardial cavity, extracts pericardial effusion or injection of medicine.
But existing puncture needle, in the time of clinical manipulation, often causes puncture failure because inserting needle is not in place.
Summary of the invention
[0005] a paracentesis pericardii needle assembly, comprises seal wire and puncture needle, and described seal wire extends in described puncture needle; Described seal wire comprises curved distal tune, and described curved distal tune is made up of described seal wire bending, and its end is sharp structure; Described seal wire is made up of highly elastic material, starts to be no more than in the length range of 3mm at the curved distal tune place of described seal wire from tip, and the angle that described tip turns over is at least 90 degree; The puncture direction of described seal wire is in the normal direction of described puncture needle needle point plane, and is positioned at the plane of the axis formation of needle point plane normal plane and puncture needle body.
In a specific embodiments of the present invention, described seal wire comprises near-end bending section, and the near-end of described puncture needle comprises a bending section.Preferably, the length between near-end bending section and the tip of described seal wire of described seal wire is L, and described length L is for being greater than 80mm; Preferably, described puncture needle comprises inner and outer tubes, and the near-end of described inner tube comprises a bending section.
Preferably, the radius of curvature of described seal wire near-end bending section is in the length range that is no more than 20mm, and the angle that described bending section turns over is for being greater than 15 degree, and preferred, in the length range that is no more than 20mm, the angle that described bending section turns over is 15-90 degree.
Preferably, the radius of curvature of the bending section of described inner tube is in the length range that is no more than 20mm, and the angle that described bending section turns over is for being greater than 45 degree, and preferred, in the length range that is no more than 20mm, the angle that described bending section turns over is 45-90 degree.
In a specific embodiments of the present invention, the needle point planar process of the outer tube of described puncture needle is to forming a plane A with the axis of puncture needle body, the radius of curvature of described inner tube near-end bending section is all in same plane B, angle between described plane A and plane B is α, and described angle α is 0-360 degree.
The near-end bending section of described seal wire radius of curvature a little all in same plane C, the angle between the plane D at the curved distal tune place of described plane C and described seal wire is β, described angle β is 0-360 degree.
Described angle β equates with described angle α; Preferably, described angle α all becomes 180 degree angles with angle β.
In a specific embodiments of the present invention, the internal structure of described puncture needle is non-revolved body structure, and the cross section of described seal wire is non-revolved body structure.
In a specific embodiments of the present invention, the near-end of described seal wire is provided with seal wire fixed structure, and the cross section of described seal wire fixed structure is non-revolved body structure.Preferably, the near-end of described joint is provided with a groove, and the distal end shape of described seal wire fixed structure and described groove match.
In a specific embodiments of the present invention, the near-end of described puncture needle is fixed with negative pressure device.
Preferably, the far-end of described puncture needle is provided with flexible ends, and it is made up of macromolecular material.
In the preferred embodiment of the present invention, described paracentesis pericardii needle assembly is in the time puncturing to pericardium, and the degree of freedom that can reverse seal wire carries out certain restriction.
Accompanying drawing explanation
Fig. 1 is the perspective view of the paracentesis pericardii needle assembly of a kind of specific embodiment according to the present invention;
Shown in Fig. 2 is the cutaway 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;
Shown in Fig. 3 is the structure chart of puncture needle inner tube in the paracentesis pericardii needle assembly of the preferred embodiment of the present invention;
Shown in Fig. 4 is the enlarged drawing at E place in Fig. 1, shows the curved distal tune structure of the paracentesis pericardii needle assembly of the preferred embodiment of the present invention;
Shown in Fig. 5 is the structure chart of seal wire in the paracentesis pericardii needle assembly of the preferred embodiment of the present invention;
Shown in Fig. 6 is the structural representation of the paracentesis pericardii needle assembly 10 of another embodiment of the invention;
Fig. 7 shown in being is the structural representation of the paracentesis pericardii needle assembly 10 of another embodiment of the invention.
Shown in Fig. 8 is the cross sectional representation along F-F line in Fig. 7;
Fig. 9 shown in being is the structural representation of the paracentesis pericardii needle assembly 10 of another embodiment of the invention.
The specific embodiment
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 perspective view of a kind of preferred paracentesis pericardii needle assembly 10 of the present invention, comprises puncture needle 12, and seal wire 13 is in the interior extension of described puncture needle 12.Described seal wire 13 is elongated, flexible flexible structure, and it comprises curved distal tune 32 and near-end bending section (not shown in figure 1).The curved distal tune 32 of described seal wire 13 is made up of described seal wire 13 bendings, and its end is sharp structure; Described seal wire 13 is made up of highly elastic material, and described curved distal tune is suitable for reverting to predetermined bending from straight configuration.Curved distal tune place at described seal wire starts to be no more than from tip in the length range of 3mm, and the angle that described tip turns over is at least 90 degree.Preferably, start in the length range of 1-2mm at the curved distal tune place of described seal wire from tip, 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 and the direction of propulsion of described seal wire between angle be greater than 90 degree, be therefore difficult for pericardium to cause damage.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 that is 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.
Shown in Fig. 2 is the cutaway view of paracentesis pericardii needle assembly 10 according to a preferred embodiment of the invention, represents the annexation between joint 11, puncture needle 12 and seal wire 13.Described puncture needle 12 is tubular structure, and it comprises far-end and near-end, can be made up of the material of any suitable biocompatibility, as stainless steel material or nickel-titanium alloy material.The body of described puncture needle 12 can be that one section of pipe forms, and can be also that two sections of pipes form, and comprises inner tube 21 and outer tube 22, as shown in Figure 3.Described inner tube 21 can be free to slide in described outer tube 22.The far-end of described outer tube 22 can be without needle point structure, can be also the structure with needle point.The far-end of described outer tube 22 is provided with flexible ends 23, and described flexible ends 23 is made up of macromolecular material, as silica gel or other suitable material.In the process of puncture, described flexible ends 23 can prevent that puncture needle from stabbing internal organs, and can increase puncture needle and organize the surface area contacting, and better reclines.The far-end of described outer tube 22 is provided with flexible ends fixed structure (not shown), and it can be welding or bonding, when described like this flexible ends 23 is inserted on described outer tube 22, is difficult for reversing and coming off.The near-end of the inner tube 21 of described puncture needle 12 comprises a bending section 24, the radius of curvature of described bending section 24 is in the length range that is no more than 20mm, the angle that bending section 24 turns over is for being greater than 45 degree, preferably, in the length range that is no more than 20mm, the angle that bending section 24 turns over is 45-90 degree.Be fixed with joint 11 in the proximal end of described inner tube 21, be fixed with joint 14 in the proximal end of described outer tube 22.Described joint 11 and joint 14 can be female Luer.
Shown in Fig. 3 is the structure chart of puncture needle inner tube in the paracentesis pericardii needle assembly of the preferred embodiment of the present invention; As shown in Figure 3, the needle point planar process of the outer tube 22 of described puncture needle 12 is to forming a plane A with the axis of puncture needle body, the radius of curvature of the bending section 24 of described inner tube 21 near-ends is all in same plane B, and the angle between described plane A and plane B is α, and described angle α is 0-360 degree; Preferably, described angle α is 180 degree.Described needle point plane refers to and the cross section of organizing the outer tube 22 reclining.
Shown in Fig. 4 is the enlarged drawing at C place in Fig. 1, represents the structure of the seal wire 13 curved distal tunes of the paracentesis pericardii needle assembly of one embodiment of the present invention; As shown in Figure 2 and Figure 4, described seal wire 13 is elongated, flexible flexible structure, and it can be made up of any suitable highly elastic material, for example nickel-titanium alloy material.Described seal wire 13 comprises curved distal tune 32 and near-end bending section 33, and described curved distal tune 32 and near-end bending section 33 are made up of described seal wire bending.The structure of described curved distal tune 32 is the structures that are suitable for reverting to from straight configuration predetermined bending, because adopting highly elastic material, makes described seal wire, make described curved distal tune 32 is straight configuration in the time that described puncture needle 12 is interior, in the time passing, can return to predetermined bending in described puncture needle 12.Described curved distal tune 32 can form 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, can be also other suitable structure.
Shown in Fig. 5 is the structure chart of seal wire in the paracentesis pericardii needle assembly of the preferred embodiment of the present invention.As shown in Figure 5, the length between the near-end bending section 33 of described seal wire 13 and the tip of described seal wire 13 is L, in the time that described seal wire 13 is straight configuration, start from tip to length be in the certain area at L place, be provided with described near-end bending section 33.Described length L is for being greater than 80mm.The radius of curvature of described near-end bending section 33 is in the length range that is no more than 20mm, and the angle that described near-end bending section 33 turns over is for being greater than 15 degree, and preferred, in the length range that is no more than 20mm, the angle that described near-end bending section 33 turns over is 15-90 degree.Described near-end bending section 33 radius of curvature a little all in same plane C, the angle between the plane D at curved distal tune 32 places of described plane C and described seal wire 13 is β, described angle β is 0-360 degree; Described angle β equates with described angle α; Preferably, described angle β is 180 degree.Can, in the process of puncture, carry out certain restriction to the torsional freedom of seal wire like this.
As shown in Figure 1, Figure 2 and Figure 4, when described tip turns over after 90 degree, the bending that described curved distal tune 32 starts from the proximal end of sharp structure can be zigzag shape, involute shape, also can be other irregular bendings that 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 that described curved distal tune 32 starts from the proximal end of sharp structure is zigzag shape, involute shape, its radius of curvature can be to be gradually to become large or ladder and become large; The bending that described curved distal tune 32 starts 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 variation of its radius of curvature can be also erratic, as can be gradually to become large or ladder and become large, but along with the further bending of seal wire, its radius of curvature starts to diminish, and becomes gradually more subsequently large or ladder and becomes large.The far-end of described curved distal tune 32 punctures after pericardium, described tip towards and the direction of propulsion of described seal wire between angle be greater than 90 degree, therefore can not puncture heart; Even along with described curved distal tune 32 progresses into pericardium, most advanced and sophisticated towards and the direction of propulsion of seal wire between angle be less than 90 degree, now, because seal wire is very long and soft, the power on seal wire cannot be delivered to tip, therefore, is also difficult for heart to cause damage.Described tip can be within the solid of the bending in described curved distal tune is surrounded, and in puncturing, is difficult for pericardium to cause damage; Even outside the solid of the bending of described tip in described curved distal tune is surrounded, because seal wire is very long and soft, the power on seal wire cannot be delivered to tip, therefore, be also difficult for heart to cause damage.Start to 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.
It can be cylindrical structural that described curved distal tune 32 starts to the part of seal wire proximal extension from sharp structure proximal end, 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 starts to the part of seal wire proximal extension from sharp structure proximal end can be also laminated structure, and its width is 0.2-1mm.
One preferred embodiment according to the present invention, in use, the puncture direction of described seal wire is in the normal direction of described puncture needle 12 needle point planes to described paracentesis pericardii needle assembly, and is positioned at the plane A of the axis formation of needle point plane normal plane and puncture needle body.In the time that described curved distal tune 32 is all positioned at described puncture needle 12, described curved distal tune 32 is straight configuration.In the time pushing forward described seal wire 13, stretch out in the body of described puncture needle 12 at the tip of described curved distal tune 32.Described tip punctures pericardium, and described seal wire 13 progresses into pericardium inside, and described curved distal tune 32 starts slowly bending, reverts to reservation shape to it, and puncture completes.
Shown in Fig. 6 is the structural representation of the paracentesis pericardii needle assembly 10 of another embodiment of the invention.As shown in Figure 6, described puncture needle assembly 10 comprises puncture needle 12, and seal wire 13 is in the interior extension of described puncture needle 12.Described puncture needle 12 comprises inner tube 21 and outer tube 22, and described seal wire 13 is elongated, flexible flexible structure, and it comprises far-end and near-end.Described seal wire 13 comprises curved distal tune 32 and near-end bending section 33, and the end of described curved distal tune 32 is sharp structure.Near-end at described outer tube 22 is also fixed with negative pressure device, and the far-end of the outer tube 22 of described puncture needle 12 is provided with flexible ends 23, and described flexible ends 23 is made up of macromolecular material, as silica gel or other suitable material.In the process of puncture, described flexible ends 23 can prevent that puncture needle from stabbing internal organs, and can increase the surface area that puncture needle and tissue contact, and better reclines, and can make puncture needle outer tube 22 far-end and tissue between there is certain adsorption area, thereby produce negative pressure.
Described seal wire 13 adopts highly elastic material to make, and described curved distal tune 32 is made up of described seal wire 13 bendings, and its structure is the structure that is suitable for reverting to from straight configuration predetermined bending.Far-end at described seal wire starts to be no more than from tip in the length range of 3mm, and the angle that described tip turns over is at least 90 degree.When described tip turns over after 90 degree, it can be involute shape that described curved distal tune 32 starts from sharp structure proximal end, and as square involute shape, triangle involute shape or other, its radius of curvature becomes continuously large or ladder and becomes large, as shown in Figure 6.
In this embodiment, the needle point planar process of the outer tube 22 of described puncture needle 12 is to forming a plane A with the axis of puncture needle body, the radius of curvature of the bending section 24 of described inner tube 21 near-ends is all in same plane B, angle between described plane A and plane B is α, and described angle α is 0-360 degree; Preferably, described angle α is 180 degree, shown in Fig. 4.
Length between the near-end bending section 33 of described seal wire 13 and the tip of described seal wire 13 is L, in the time that described seal wire 13 is straight configuration, from pointed head end start to length be in the certain area at L place, be provided with described near-end bending section 33.Described near-end bending section 33 radius of curvature a little all in same plane C, the angle between the plane D at curved distal tune 32 places of described plane C and described seal wire 13 is β, described angle β is 0-360 degree; Described β equates with described α; Preferably, described angle β is 180 degree.Can, in the process of puncture, carry out certain restriction to the torsional freedom of seal wire, shown in Fig. 5 like this.
Described negative pressure device comprises connection valve 14 and negative pressure threeway 15, between described connection valve 14 and negative pressure threeway 15, connects by negative pressure connection tube 16.Described connection valve 14 can be that entirety forms, and also can split form, and as shown in Figure 6, described connection valve 14 comprises valve body 141, and it has far-end, near-end and central lumen.The far-end of described valve body 141 is provided with bottom end cover 142, and the near-end of described valve body 141 is provided with upper end cover 143.The near-end of described puncture needle 12 is fixed in described bottom end cover 142, and its end can also be overlapped a segment protect pipe.In described upper end cover 143, be also provided with a diaphragm seal 144, play the effect of sealing.One end of described negative pressure connection tube 16 is fixed in described connection valve 14, and the other end is fixed in described negative pressure threeway 15.Near-end in described inner tube 21 is also connected with joint 11, and it can be female Luer.
One preferred embodiment according to the present invention, described paracentesis pericardii needle assembly in use, first, is opened negative pressure source, after pericardium is adsorbed in flexible ends, starts to puncture.The puncture direction of described seal wire 13 is in the normal direction of described puncture needle 12 needle point planes, and is positioned at the plane of the axis formation of needle point plane normal plane and puncture needle 12 bodys.In the time that described curved distal tune 32 is all positioned at described puncture needle 12, described curved distal tune 32 is straight configuration.In the time pushing forward described seal wire 13, the pointed head end of described curved distal tune 32 from the body of described puncture needle 12 out, it is positioned at described plane A.Described oxycephaly terminal spine is broken pericardium, and described seal wire 13 progresses into pericardium inside, and described curved distal tune 32 starts slowly bending, reverts to reservation shape to it, and puncture completes.
In embodiment shown in Fig. 6, all the other structures of described seal wire 13 and puncture needle 12 are with the embodiment shown in Fig. 1 to Fig. 5.
Shown in Fig. 7 is the cross sectional representation of the paracentesis pericardii needle assembly 10 of another embodiment of the invention; Fig. 8 is the cross sectional representation along F-F line in Fig. 7.As shown in Figure 7 and Figure 8, described puncture needle assembly 10 comprises puncture needle 12, and seal wire 13 is in the interior extension of described puncture needle 12.Described puncture needle 12 comprises inner tube 21 and outer tube 22, and described seal wire 13 is elongated, flexible flexible structure, and it comprises far-end and near-end.Near-end at described outer tube 22 is also fixed with joint 14, is fixed with joint 11 at the near-end of inner tube 21.Described seal wire 13 comprises curved distal tune 32, and the end of described curved distal tune 32 is sharp structure.The far-end of the outer tube 22 of described puncture needle 12 is provided with flexible ends 23, and described flexible ends 23 is made up of macromolecular material, as silica gel or other suitable material.In the process of puncture, described flexible ends 23 can prevent that puncture needle from stabbing internal organs, and can increase puncture needle and organize the surface area contacting, and better reclines.
Described seal wire 13 adopts highly elastic material to make, and described curved distal tune 32 is made up of described seal wire 13 bendings, and its structure is the structure that is suitable for reverting to from straight configuration predetermined bending.The cross section of described seal wire 13 is non-revolved body structure, and it can be rectangle, square, the non-revolved body structures such as triangle or ellipse.The internal structure of described inner tube 21 is non-revolved body structure, and it can be rectangle, square, the non-revolved body structures such as triangle or ellipse.And when described seal wire 13 is placed in the inner tube 21 of described puncture needle 12 when interior, the cross section of the cross section of described inner tube 21 and described seal wire 13 can not be subjected to displacement.Therefore in the process of puncture, the degree of freedom that seal wire reverses is subject to certain restrictions.Described non-revolved body structure refers to that the shape of cross section of described seal wire or inner tube is any geometry except rotary structure.Revolving body herein refers to two points of two ends hypothesis at an object, and 2 even being aligneds are through object, object is take this line as center of rotation, when rotated its each partial rotation when fixing a position be shape.Far-end at described seal wire starts to be no more than from tip in the length range of 3mm, and the angle that described tip turns over is at least 90 degree.When described tip turns over after 90 degree, it can be zigzag shape that described curved distal tune 32 starts from sharp structure proximal end, and it is large that its radius of curvature becomes continuously, as described in Figure 7.In use, the puncture direction of described seal wire is in the normal direction of described puncture needle 12 needle point planes to described paracentesis pericardii needle assembly, and is positioned at the plane of the axis formation of needle point plane normal plane and puncture needle 12 bodys.
In embodiment shown in Fig. 7 and Fig. 8, the structure of described seal wire 13 curved distal tunes is with the embodiment shown in Fig. 1 to Fig. 5.In embodiment shown in Fig. 7 and Fig. 8, the structure of described joint 11 and joint 14 also can be with the embodiment shown in Fig. 6.
Shown in Fig. 9 is the structural representation of the paracentesis pericardii needle assembly 10 of another embodiment of the invention.As shown in Figure 9, described puncture needle assembly 10 comprises puncture needle 12, and seal wire 13 is in the interior extension of described puncture needle 12.Described puncture needle 12 comprises inner tube 21 and outer tube 22, and described seal wire 13 is elongated, flexible flexible structure, and it comprises far-end and near-end.Described seal wire 13 comprises curved distal tune 32, and the end of described curved distal tune 32 is sharp structure.Near-end at described outer tube 22 is also fixed with joint 14, is fixed with joint 11 at the near-end of inner tube 21.The far-end of the outer tube 22 of described puncture needle 12 is provided with flexible ends 23, and described flexible ends 23 is made up of macromolecular material, as silica gel or other suitable material.In the process of puncture, described flexible ends 23 can prevent that puncture needle from stabbing internal organs, and can increase puncture needle and organize the surface area contacting, and better reclines.
Described seal wire 13 adopts highly elastic material to make, and described curved distal tune 32 is made up of described seal wire 13 bendings, and its structure is the structure that is suitable for reverting to from straight configuration predetermined bending.Far-end at described seal wire starts to be no more than from tip in the length range of 3mm, and the angle that described tip turns over is at least 90 degree.When described tip turns over after 90 degree, it can be involute shape that described curved distal tune 32 starts from sharp structure proximal end, and as square involute shape, triangle involute shape or other, its radius of curvature becomes continuously large or ladder and becomes large, as shown in Figure 9.
The near-end of described seal wire 13 is provided with seal wire fixed block 34, and described seal wire fixed block 34 is demountable structure, and its clamping is fixed on the near-end of described seal wire 13.The near-end of described joint 11 is provided with a groove (not shown), and the distal end shape of described seal wire fixed block 34 and described groove match.The cross section of described seal wire fixed block 34 is non-revolved body structure, and it can be rectangle, square, the non-revolved body structures such as triangle or ellipse.Therefore in the process of puncture, the degree of freedom that seal wire reverses is subject to certain restrictions.
In embodiment shown in Fig. 9, the structure of described seal wire 13 curved distal tunes is with the embodiment shown in Fig. 1 to Fig. 5.In embodiment shown in Fig. 7 and Fig. 8, the structure of described joint 11 and joint 14 also can be with the embodiment shown in Fig. 6.
Embodiments of the present invention are not limited to described in above-described embodiment; without departing from the spirit and scope of the present invention in the situation that; those of ordinary skills 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.
Claims (11)
1. a paracentesis pericardii needle assembly, is characterized in that comprising seal wire and puncture needle, and described seal wire extends in described puncture needle; Described seal wire comprises curved distal tune, and described curved distal tune is made up of described seal wire bending, and its end is sharp structure; Described seal wire is made up of highly elastic material, starts to be no more than in the length range of 3mm at the curved distal tune place of described seal wire from tip, and the angle that described tip turns over is at least 90 degree; The puncture direction of described seal wire is in the normal direction of described puncture needle needle point plane, and is positioned at the plane of the axis formation of needle point plane normal plane and puncture needle body.
2. paracentesis pericardii needle assembly according to claim 1, is characterized in that described seal wire comprises near-end bending section, and the near-end of described puncture needle comprises a bending section; Preferably, the length between near-end bending section and the tip of described seal wire of described seal wire is L, and described length L is for being greater than 80mm; Preferably, described puncture needle comprises inner and outer tubes, and the near-end of described inner tube comprises a bending section.
3. paracentesis pericardii needle assembly according to claim 2, the radius of curvature that it is characterized in that described seal wire near-end bending section is in the length range that is no more than 20mm, the angle that described bending section turns over is for being greater than 15 degree; Preferably, in the length range that is no more than 20mm, the angle that described bending section turns over is 15-90 degree.
4. paracentesis pericardii needle assembly according to claim 2, the radius of curvature that it is characterized in that the bending section of described inner tube is in the length range that is no more than 20mm, the angle that described bending section turns over is for being greater than 45 degree; Preferably, in the length range that is no more than 20mm, the angle that described bending section turns over is 45-90 degree.
5. according to the paracentesis pericardii needle assembly described in claim 2 or 3 or 4, it is characterized in that the needle point planar process of outer tube of described puncture needle is to forming a plane A with the axis of puncture needle body, the radius of curvature of the bending section of described inner tube near-end is all in same plane B, angle between described plane A and plane B is α, and described angle α is 0-360 degree.
6. according to the paracentesis pericardii needle assembly described in claim 2 or 3 or 4, it is characterized in that described seal wire near-end bending section radius of curvature a little all in same plane C, angle between the plane D at the curved distal tune place of described plane C and described seal wire is β, and described angle β is 0-360 degree.
7. according to the paracentesis pericardii needle assembly described in claim 3 or 4, it is characterized in that described angle β equates with described angle α; Preferably, described angle α all becomes 180 degree angles with angle β.
8. paracentesis pericardii needle assembly according to claim 1, the internal structure that it is characterized in that described puncture needle is non-revolved body structure, the cross section of described seal wire is non-revolved body structure.
9. paracentesis pericardii needle assembly according to claim 1, is characterized in that the near-end of described seal wire is provided with seal wire fixed structure, and the cross section of described seal wire fixed structure is non-revolved body structure; Preferably, the near-end of described joint is provided with a groove, and the distal end shape of described seal wire fixed structure and described groove match.
10. according to the paracentesis pericardii needle assembly described in the claims, it is characterized in that the near-end of described puncture needle is fixed with negative pressure device.
11. according to the paracentesis pericardii needle assembly described in the claims, it is characterized in that the far-end of described puncture needle is provided with flexible ends, and it is made up of macromolecular material.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210582505.4A CN103892891B (en) | 2012-12-28 | 2012-12-28 | A kind of paracentesis pericardii needle assemblies |
| PCT/CN2013/001652 WO2014101298A1 (en) | 2012-12-28 | 2013-12-27 | Pericardium puncture needle assembly |
| CN201380070616.XA CN104918567B (en) | 2012-12-28 | 2013-12-27 | A kind of paracentesis pericardii needle assemblies |
| EP13868498.0A EP2939619B1 (en) | 2012-12-28 | 2013-12-27 | Pericardium puncture needle assembly |
| CN201811032852.3A CN109009355B (en) | 2012-12-28 | 2013-12-27 | Pericardium puncture needle assembly |
| EP19212788.4A EP3636182A1 (en) | 2012-12-28 | 2013-12-27 | Pericardium puncture needle assembly |
| US14/758,191 US10278727B2 (en) | 2012-12-28 | 2013-12-27 | Pericardium puncture needle assembly |
| US16/372,326 US20190223904A1 (en) | 2012-12-28 | 2019-04-01 | Pericardium puncture needle assembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210582505.4A CN103892891B (en) | 2012-12-28 | 2012-12-28 | A kind of paracentesis pericardii needle assemblies |
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| CN103892891A true CN103892891A (en) | 2014-07-02 |
| CN103892891B CN103892891B (en) | 2019-02-26 |
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| CN201210582505.4A Active CN103892891B (en) | 2012-12-28 | 2012-12-28 | A kind of paracentesis pericardii needle assemblies |
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| CN107095708A (en) * | 2017-06-08 | 2017-08-29 | 邳州东大医院 | Adjustable Pericardiopuncture needle |
| CN107847227A (en) * | 2015-06-11 | 2018-03-27 | 波士顿科学国际有限公司 | Flexible biopsy needle |
| CN110811821A (en) * | 2018-08-14 | 2020-02-21 | 复旦大学附属中山医院 | Ablation catheter |
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| CN110811821A (en) * | 2018-08-14 | 2020-02-21 | 复旦大学附属中山医院 | Ablation catheter |
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| CN103892891B (en) | 2019-02-26 |
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