US20190142397A1 - Echogenic Enhancement for a Needle - Google Patents
Echogenic Enhancement for a Needle Download PDFInfo
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- US20190142397A1 US20190142397A1 US16/246,846 US201916246846A US2019142397A1 US 20190142397 A1 US20190142397 A1 US 20190142397A1 US 201916246846 A US201916246846 A US 201916246846A US 2019142397 A1 US2019142397 A1 US 2019142397A1
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- Prior art keywords
- needle
- depressions
- trough
- depression
- longitudinal axis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/0233—Pointed or sharp biopsy instruments
-
- 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
- A61B17/3403—Needle locating or guiding means
-
- 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
- A61B17/3403—Needle locating or guiding means
- A61B2017/3413—Needle locating or guiding means guided by ultrasound
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
- A61B2090/3925—Markers, e.g. radio-opaque or breast lesions markers ultrasonic
Definitions
- Needle biopsies are common procedures for the diagnosis and staging of disease. These procedures are often done under ultrasound guidance to allow physicians performing the procedure to visualize the position of the needle in relation to target and surrounding tissue structures.
- the echogenicity of the needle i.e., the visibility of the needle under ultrasound
- the echogenecity may be affected by the size of the needle, a difference between the acoustic impedance of the needle and that of the surrounding tissue, an angle of the needle relative to the transducer, the frequency of the ultrasound energy used and various characteristics of the processing algorithm.
- the present invention is directed to a needle comprising a surface with a plurality of first ultrasound reflecting depressions formed therein, the first depressions being distributed along at least a portion of a length of the needle separated from one another by intervening sections, each of the first depressions extending along a curve between first and second ends adjacent to corresponding ones of the intervening sections with troughs at which surfaces of each of the first depressions most closely approach a longitudinal axis of the needle being offset toward the first ends of each of the first depressions.
- FIG. 1 shows a perspective view of a needle, according to an exemplary embodiment of the present invention
- FIG. 2 shows an enlarged partial side view of a needle with depressions along a length of the needle, according to the exemplary embodiment of FIG. 1 ;
- FIG. 3 shows an enlarged partial side view of a needle with depressions of a variety of shapes, according to a further embodiment of the present invention
- FIG. 4 shows an enlarged partial side view of a needle with depressions of a variety of shapes and spaces, according to another embodiment of the present invention.
- FIG. 5 shows an enlarged partial side view of a needle with depressions along a length of the needle and a coating layer, according to a further embodiment of the present invention.
- the present invention relates to devices for conducting biopsies under ultrasound guidance.
- Exemplary embodiments of the invention are directed to a pattern on an outer surface of a needle such that the needle has enhanced ultrasound visibility, allowing the needle to remain visible at various angles relative to the transducer.
- the exemplary embodiments are described as a needle, the device may be any medical device that may be seen under ultrasound guidance.
- ultrasound is an electromagnetic energy
- the patterns described herein, which enhance visibility may also be used with other energy sources such as, for example, light.
- a needle 100 according to an exemplary embodiment of the invention comprises a longitudinal body 118 extending between a distal end 120 and a proximal end 122 .
- An outer surface 104 of the needle 100 includes a plurality of depressions 106 formed along at least a portion of a length of the needle 100 to enhance the visibility of the needle 100 under ultrasound guidance by scattering and reflecting back toward a transducer sound waves incident thereon.
- the needle 100 will generally comprise a lumen 102 extending therethrough to an opening in a distal tip 110 at a distal end 120 of the needle 100 for collecting target tissue as would be understood by those skilled in the art. As shown in FIG.
- the tip 110 may be formed by a cut through the needle 100 at an angle relative to a longitudinal axis of the longitudinal body 118 . so that a distal-most surface of the needle 100 extends along an angle relative to a longitudinal axis of the needle 100 with an area of the opening to the lumen 102 greater than a cross-sectional area of the lumen 102 within the needle 100 .
- the needle 100 may be formed of any biocompatible material rigid enough to penetrate the tissue targeted by the procedure to which the needle 100 is directed.
- the needle 100 may be formed of stainless steel or tungsten to enhance the echogencity of the needle.
- tungsten has an acoustic impedance greater than that of stainless steel increasing the difference in acoustic impedance between the needle 100 and the surrounding tissue and thereby enhancing echogenicity. It will be understood in the art, however, that any of a variety of materials may be used to form the needle 100 so long as the material is biocompatible and provides a visible difference in echogenicity as compared to the tissue through which it will be deployed.
- the depressions 106 are shaped to directly reflect sound waves received over a broad range of angles so that the transducer may be placed in a variety of positions relative to the needle 100 . That is, the shapes of the depressions 106 are selected to present at least a part of a face thereof substantially perpendicular to incoming ultrasound radiation over a wide range of incoming angles so that this radiation will be reflected back to the device from which it originated.
- a surface of the depression 106 ranges from a steep portion 112 extending from a first end portion abutting a space 108 between adjacent depressions 106 nearly perpendicular to a longitudinal axis of the needle 100 to a trough 114 at which the depression 106 transitions to a shallow portion 116 extending to a second end portion of the depression 106 at an angle less steep than that of the steep portion 112 . That is, as the depth of each of the steep portion 112 is equal to that of the shallow portion 116 , the trough 114 is closer to the first end than to the second end of the depression 106 .
- the surface of the steep portion 112 is, therefore, close to a plane perpendicular to a longitudinal axis of the needle 100 sloping slightly toward a plane parallel to the longitudinal axis.
- at least a portion of sound waves from a transducer positioned anywhere in the range of slightly more than 0° to close to 90°, relative to a longitudinal axis of the needle 100 will impact a portion of the depression 106 which is substantially perpendicular to a front of the wave sending the wave directly back to the transducer.
- the steep portion 112 is positioned to reflect waves back to a transducer aimed nearly parallel (close to 0°) to the needle 100 while the shallow portion is oriented to reflect waves back to a transducer positioned substantially perpendicular to the longitudinal axis (close to 90°) of the needle 100 while the gradual transition between these portions provides surfaces oriented to reflect back to a transducer ultrasound radiation impinging on the needle 100 at any angle between these extremes. It will be understood by those of skill in the art that where the transducer is positioned proximally of the distal end 120 of the needle 100 , the steep portion 112 may face proximally such that the sound waves reflect over a broad range of needle-transducer angles.
- each depression 106 extends around an entire circumference of the needle 100 .
- the depression 106 may extend around only a portion of the circumference of the needle 100 or may be configured as a slot on the outer surface 104 of the needle 100 .
- a space 108 which is substantially flat along a length of the needle 100 is located between each pair of adjacent depressions 106 .
- the depressions 106 are substantially evenly spaced such that each space 108 is equal in length.
- the length of each space 108 may vary along the length of the needle 100 .
- the needle 100 is described as being substantially cylindrical, it will be understood by those of skill in the art that the needle 100 may take a variety of shapes so long as it includes a plurality of depressions 106 about at least a portion of a perimeter of the outer surface 104 .
- a sheath which may be slidable along a portion of a length of a needle may include a pattern substantially similar to the pattern formed by the depressions 106 on the needle 100 .
- a stylet which may be slidable through a lumen of a needle to prevent non-target tissue from entering the lumen may be formed with a pattern substantially similar to the pattern formed by the depressions 106 on the needle 100 .
- a needle 200 according to another embodiment of the invention is substantially the same as the needle 100 described above except that the depressions 206 of the needle 200 are not all of the same shape.
- the depressions 206 include a plurality of first depressions 206 a each of which includes a steep portion 212 oriented to more effectively reflect energy back to a transducer oriented substantially parallel to the needle 200 from the steep portion 212 while each of a plurality of second depressions 206 b is shaped as a shallow bowl 214 oriented to more effectively reflect energy to a transducer oriented at a steeper angle relative to the longitudinal axis of the needle 200 (at an angle close to 90° relative to the needle 200 ).
- each of the first depressions 206 a is located between a pair of second depressions 206 b are separated by a space 208 which is substantially flat along a length of the needle 200 .
- the spaces 208 of the needle 200 are substantially equal in size.
- the various depressions 206 a , 206 b may be separated by spaces 208 of varying size, as shown in FIG. 4 .
- the different sizes of the spaces 208 may further tune the response to the sound waves at different angles.
- more than 2 shapes of depressions 206 may be included in the needle 200 .
- a plurality of first depressions may be oriented to effectively reflect energy delivered from a probe angled between 0 and 30° relative to the longitudinal axis of the needle 200 while a plurality of second depressions is oriented to effectively reflect energy delivered from a probe angled between 30 and 60° relative to the longitudinal axis and a plurality of third depressions is oriented to effectively reflect energy delivered from a probe angled between 60 and 90° relative to the longitudinal axis.
- a needle 300 which may be substantially similar to either of the needles 100 and 200 described above, further comprises a coating layer 316 covering a plurality of depressions 306 .
- FIG. 5 shows the needle 300 including depressions 306 of a single shape as in the needle 100 , it will be understood by those of skill in the art that the coating layer 316 may be included on any of the needle embodiments described above with any variety of depression shapes and spacings.
- the coating layer 316 may be formed of a material having an acoustic impedance similar to that of the body tissue within which the needle 300 is to be deployed, but with a lower speed of sound transmission therethrough.
- This difference in the speed of sound transmission through the tissue and the coating layer 316 refracts the sound waves toward the needle 300 , steepening their angle of impact and improving the amount of acoustic energy reflected back to the transducer.
- An example of a coating layer that may be used is PTFE, which has a lower speed of sound, resulting in the refracted sound waves.
- a depth of the coating 316 may also be varied to optimize constructive interference and minimize destructive interference between incoming sound waves and reflected sound waves leaving the surface 318 of the coating 316 .
- the embodiments of the present invention may be easily manufactured using a simple tool.
- the depressions 106 may be formed in the needle 100 using a tool with a protrusion a profile of which matches a desired shape of the depression 106 .
- the tool may be rotated about a circumference, or a part of a circumference, of the needle 100 with the protrusion contacting the outer surface 104 to form the depressions 106 in the longitudinal body 118 the needle 100 as would be understood by those skilled in the art.
- the needle 100 instead of rotating the tool about the needle 100 , the needle 100 may be rotated about a longitudinal axis of the needle while the tool remains stationary such that the protrusion contacts the outer surface 104 of the needle 100 .
- the plurality of depressions 106 may be formed by simply moving the tool along the longitudinal axis of the needle 100 or by moving the needle 100 along the longitudinal axis, by a desired distance of the space 108 , and rotating the tool or the needle 100 as described above. This may be repeated until a desired number of depressions 106 have been formed.
- a tool may include multiple protrusions to form the desired number of depressions 106 in one operation or in a reduced number of operations.
- a tool to form a needle such as the needle 200 may include a first protrusion having a shape corresponding to the desired shape of the first depressions 206 a while a second protrusion has a shape corresponding to a desired shape of the second depressions 206 b , etc.
- patterns formed by the depressions 106 , 206 , 306 may be applied to the needles 100 , 200 , 300 , respectively, in the form of rings or other similar elements applied around at least a portion of the outer surfaces of the needles 100 , 200 and 300 .
- a press may be used to stamp the needles with the depressions 106 , 206 , 306 to form the desired patterns on the needles 100 , 200 and 300 .
- the depressions 106 , 206 may be formed by laser micro-machining or by using an EDM process.
- the needle 300 may be coated with a desired thickness of the selected material to form the coating 306 using any known technique.
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Abstract
A needle includes a surface with a plurality of first ultrasound reflecting depressions formed therein. The first depressions are distributed along at least a portion of a length of the needle separated from one another by intervening sections. Each of the first depressions is extending along a curve between first and second ends adjacent to corresponding ones of the intervening sections with troughs at which surfaces of each of the first depressions most closely approach a longitudinal axis of the needle being offset toward the first ends of each of the first depressions.
Description
- This application claims the priority to the U.S. Provisional Application Ser. No. 61/141,473, entitled “Echogenic Enhancement for a Needle” filed on Dec. 30, 2008. The specification of the above-identified application is incorporated herewith by reference.
- Needle biopsies are common procedures for the diagnosis and staging of disease. These procedures are often done under ultrasound guidance to allow physicians performing the procedure to visualize the position of the needle in relation to target and surrounding tissue structures. Thus, the echogenicity of the needle (i.e., the visibility of the needle under ultrasound) often impacts the success of the procedure. The echogenecity may be affected by the size of the needle, a difference between the acoustic impedance of the needle and that of the surrounding tissue, an angle of the needle relative to the transducer, the frequency of the ultrasound energy used and various characteristics of the processing algorithm.
- Various techniques have been developed in an attempt to improve the echogenic properties of needles including mechanical treatments of the outer surface of the needle or echogenic coatings. However, the current mechanical treatments involving the creation of discrete shapes repeated along the axis and/or about the circumference of a needle are complex to form. Other mechanical treatments include the formation of circumferential grooves or spirals around the needle. However, these grooves are tuned to only one angle and one frequency such that a slightly different spacing and/or a different frequency may have a significant negative impact on echogenic performance. The application of echogenic coatings increases the complexity of the devices and does not necessarily enhance the performance of these coated devices relative to the mechanical treatments described above. Furthermore, the echogenic properties of these coatings may decay over time.
- The present invention is directed to a needle comprising a surface with a plurality of first ultrasound reflecting depressions formed therein, the first depressions being distributed along at least a portion of a length of the needle separated from one another by intervening sections, each of the first depressions extending along a curve between first and second ends adjacent to corresponding ones of the intervening sections with troughs at which surfaces of each of the first depressions most closely approach a longitudinal axis of the needle being offset toward the first ends of each of the first depressions.
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FIG. 1 shows a perspective view of a needle, according to an exemplary embodiment of the present invention; -
FIG. 2 shows an enlarged partial side view of a needle with depressions along a length of the needle, according to the exemplary embodiment ofFIG. 1 ; -
FIG. 3 shows an enlarged partial side view of a needle with depressions of a variety of shapes, according to a further embodiment of the present invention; -
FIG. 4 shows an enlarged partial side view of a needle with depressions of a variety of shapes and spaces, according to another embodiment of the present invention; and -
FIG. 5 shows an enlarged partial side view of a needle with depressions along a length of the needle and a coating layer, according to a further embodiment of the present invention. - The present invention, which may be further understood with reference to the following description and the appended drawings, relates to devices for conducting biopsies under ultrasound guidance. Exemplary embodiments of the invention are directed to a pattern on an outer surface of a needle such that the needle has enhanced ultrasound visibility, allowing the needle to remain visible at various angles relative to the transducer. It will be understood by those of skill in the art that although the exemplary embodiments are described as a needle, the device may be any medical device that may be seen under ultrasound guidance. It will also be understood by those of skill in the art that since ultrasound is an electromagnetic energy, the patterns described herein, which enhance visibility, may also be used with other energy sources such as, for example, light.
- As shown in
FIG. 1 , aneedle 100 according to an exemplary embodiment of the invention comprises a longitudinal body 118 extending between a distal end 120 and a proximal end 122. Anouter surface 104 of theneedle 100 includes a plurality ofdepressions 106 formed along at least a portion of a length of theneedle 100 to enhance the visibility of theneedle 100 under ultrasound guidance by scattering and reflecting back toward a transducer sound waves incident thereon. Theneedle 100 will generally comprise alumen 102 extending therethrough to an opening in adistal tip 110 at a distal end 120 of theneedle 100 for collecting target tissue as would be understood by those skilled in the art. As shown inFIG. 1 , thetip 110 may be formed by a cut through theneedle 100 at an angle relative to a longitudinal axis of the longitudinal body 118. so that a distal-most surface of theneedle 100 extends along an angle relative to a longitudinal axis of theneedle 100 with an area of the opening to thelumen 102 greater than a cross-sectional area of thelumen 102 within theneedle 100. - As would be understood by those skilled in the art, the
needle 100 may be formed of any biocompatible material rigid enough to penetrate the tissue targeted by the procedure to which theneedle 100 is directed. For example, theneedle 100 may be formed of stainless steel or tungsten to enhance the echogencity of the needle. As would be understood by those skilled in the art, tungsten has an acoustic impedance greater than that of stainless steel increasing the difference in acoustic impedance between theneedle 100 and the surrounding tissue and thereby enhancing echogenicity. It will be understood in the art, however, that any of a variety of materials may be used to form theneedle 100 so long as the material is biocompatible and provides a visible difference in echogenicity as compared to the tissue through which it will be deployed. - The
depressions 106, as shown in the enlarged side view ofFIG. 2 , are shaped to directly reflect sound waves received over a broad range of angles so that the transducer may be placed in a variety of positions relative to theneedle 100. That is, the shapes of thedepressions 106 are selected to present at least a part of a face thereof substantially perpendicular to incoming ultrasound radiation over a wide range of incoming angles so that this radiation will be reflected back to the device from which it originated. Thus, a surface of thedepression 106 ranges from asteep portion 112 extending from a first end portion abutting aspace 108 betweenadjacent depressions 106 nearly perpendicular to a longitudinal axis of theneedle 100 to atrough 114 at which thedepression 106 transitions to a shallow portion 116 extending to a second end portion of thedepression 106 at an angle less steep than that of thesteep portion 112. That is, as the depth of each of thesteep portion 112 is equal to that of the shallow portion 116, thetrough 114 is closer to the first end than to the second end of thedepression 106. At the first end, the surface of thesteep portion 112 is, therefore, close to a plane perpendicular to a longitudinal axis of theneedle 100 sloping slightly toward a plane parallel to the longitudinal axis. Thus, at least a portion of sound waves from a transducer positioned anywhere in the range of slightly more than 0° to close to 90°, relative to a longitudinal axis of theneedle 100 will impact a portion of thedepression 106 which is substantially perpendicular to a front of the wave sending the wave directly back to the transducer. Thesteep portion 112 is positioned to reflect waves back to a transducer aimed nearly parallel (close to 0°) to theneedle 100 while the shallow portion is oriented to reflect waves back to a transducer positioned substantially perpendicular to the longitudinal axis (close to 90°) of theneedle 100 while the gradual transition between these portions provides surfaces oriented to reflect back to a transducer ultrasound radiation impinging on theneedle 100 at any angle between these extremes. It will be understood by those of skill in the art that where the transducer is positioned proximally of the distal end 120 of theneedle 100, thesteep portion 112 may face proximally such that the sound waves reflect over a broad range of needle-transducer angles. - In a preferred embodiment, each
depression 106 extends around an entire circumference of theneedle 100. However, it will be understood by those skilled in the art that thedepression 106 may extend around only a portion of the circumference of theneedle 100 or may be configured as a slot on theouter surface 104 of theneedle 100. Aspace 108 which is substantially flat along a length of theneedle 100 is located between each pair ofadjacent depressions 106. In the embodiment shown inFIGS. 1 and 2 , thedepressions 106 are substantially evenly spaced such that eachspace 108 is equal in length. However, it will also be understood by those of skill in the art that the length of eachspace 108 may vary along the length of theneedle 100. Although theneedle 100 is described as being substantially cylindrical, it will be understood by those of skill in the art that theneedle 100 may take a variety of shapes so long as it includes a plurality ofdepressions 106 about at least a portion of a perimeter of theouter surface 104. - It will be understood by those of skill in the art that the features of the
needle 100, as described above may also be included in other medical devices that may be viewed under ultrasound guidance. For example, in another embodiment, a sheath, which may be slidable along a portion of a length of a needle may include a pattern substantially similar to the pattern formed by thedepressions 106 on theneedle 100. In another embodiment, a stylet, which may be slidable through a lumen of a needle to prevent non-target tissue from entering the lumen may be formed with a pattern substantially similar to the pattern formed by thedepressions 106 on theneedle 100. - A
needle 200 according to another embodiment of the invention is substantially the same as theneedle 100 described above except that thedepressions 206 of theneedle 200 are not all of the same shape. For example, thedepressions 206 include a plurality offirst depressions 206 a each of which includes asteep portion 212 oriented to more effectively reflect energy back to a transducer oriented substantially parallel to theneedle 200 from thesteep portion 212 while each of a plurality ofsecond depressions 206 b is shaped as ashallow bowl 214 oriented to more effectively reflect energy to a transducer oriented at a steeper angle relative to the longitudinal axis of the needle 200 (at an angle close to 90° relative to the needle 200). In the embodiment of theneedle 200 shown inFIG. 3 , each of thefirst depressions 206 a is located between a pair ofsecond depressions 206 b are separated by aspace 208 which is substantially flat along a length of theneedle 200. As described above in regard to theneedle 100, thespaces 208 of theneedle 200 are substantially equal in size. However, it will be understood by those of skill in the art that thevarious depressions spaces 208 of varying size, as shown inFIG. 4 . It will also be understood by those of skill in the art that the different sizes of thespaces 208 may further tune the response to the sound waves at different angles. Furthermore, those skilled in the art will understand that more than 2 shapes ofdepressions 206 may be included in theneedle 200. For example, a plurality of first depressions may be oriented to effectively reflect energy delivered from a probe angled between 0 and 30° relative to the longitudinal axis of theneedle 200 while a plurality of second depressions is oriented to effectively reflect energy delivered from a probe angled between 30 and 60° relative to the longitudinal axis and a plurality of third depressions is oriented to effectively reflect energy delivered from a probe angled between 60 and 90° relative to the longitudinal axis. - In a further embodiment of the present invention, as shown in
FIG. 5 , aneedle 300, which may be substantially similar to either of theneedles coating layer 316 covering a plurality ofdepressions 306. AlthoughFIG. 5 shows theneedle 300 includingdepressions 306 of a single shape as in theneedle 100, it will be understood by those of skill in the art that thecoating layer 316 may be included on any of the needle embodiments described above with any variety of depression shapes and spacings. Thecoating layer 316 may be formed of a material having an acoustic impedance similar to that of the body tissue within which theneedle 300 is to be deployed, but with a lower speed of sound transmission therethrough. This difference in the speed of sound transmission through the tissue and thecoating layer 316 refracts the sound waves toward theneedle 300, steepening their angle of impact and improving the amount of acoustic energy reflected back to the transducer. An example of a coating layer that may be used is PTFE, which has a lower speed of sound, resulting in the refracted sound waves. A depth of thecoating 316 may also be varied to optimize constructive interference and minimize destructive interference between incoming sound waves and reflected sound waves leaving the surface 318 of thecoating 316. - The embodiments of the present invention, as described above, may be easily manufactured using a simple tool. For example, the
depressions 106 may be formed in theneedle 100 using a tool with a protrusion a profile of which matches a desired shape of thedepression 106. The tool may be rotated about a circumference, or a part of a circumference, of theneedle 100 with the protrusion contacting theouter surface 104 to form thedepressions 106 in the longitudinal body 118 theneedle 100 as would be understood by those skilled in the art. Alternatively, instead of rotating the tool about theneedle 100, theneedle 100 may be rotated about a longitudinal axis of the needle while the tool remains stationary such that the protrusion contacts theouter surface 104 of theneedle 100. The plurality ofdepressions 106 may be formed by simply moving the tool along the longitudinal axis of theneedle 100 or by moving theneedle 100 along the longitudinal axis, by a desired distance of thespace 108, and rotating the tool or theneedle 100 as described above. This may be repeated until a desired number ofdepressions 106 have been formed. Alternatively, a tool may include multiple protrusions to form the desired number ofdepressions 106 in one operation or in a reduced number of operations. For example, a tool to form a needle such as theneedle 200 may include a first protrusion having a shape corresponding to the desired shape of thefirst depressions 206 a while a second protrusion has a shape corresponding to a desired shape of thesecond depressions 206 b, etc. - Alternatively, patterns formed by the
depressions needles needles depressions needles depressions depressions needles depressions 306 have been formed by any of the above-described methods, theneedle 300 may be coated with a desired thickness of the selected material to form thecoating 306 using any known technique. - It will be apparent to those skilled in the art that various modifications and variations can be made in the structure and methodology of the present invention, without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided that they come within the scope of the appended claims and their equivalents.
Claims (16)
1-16. (canceled)
17. A needle, comprising:
a longitudinal body extending between a proximal end and a distal end and including a lumen extending therethrough, an outer surface of the longitudinal body including a plurality of first ultrasound reflecting depressions spaced apart from one another along at least a portion of a length of the longitudinal body, each of the first depressions extending along a longitudinal axis of the needle and including a concave curve having a trough, the concave curve having a first portion extending from the trough to a first end of the first depression at a first curvature slope and a second portion extending from the trough to a second end of the first depression at a second curvature slope, the first curvature slope being steeper than the second curvature slope.
18. The needle of claim 17 , wherein the trough includes a gradual transition between the first and second curvature slopes.
19. The needle of claim 17 , wherein the outer surface of the longitudinal body includes intervening sections between adjacent first depressions.
20. The needle of claim 19 , wherein the intervening sections extend along and parallel to the longitudinal axis of the needle.
21. The needle of claim 20 , wherein lengths of the intervening sections are one of consistent or varying along the needle.
22. The needle of claim 17 , wherein the first portion approaches the first end of the first depression at an angle substantially perpendicular to the longitudinal axis of the needle.
23. The needle of claim 17 , wherein the trough is offset towards the first end of the first depression.
24. The needle of claim 17 , wherein the first end of the each fo the first depressions is at a distal end thereof.
25. The needle of claim 17 , wherein each of the first depressions extends around an entire circumference of the needle.
26. The needle of claim 17 , wherein each of the first depressions extends around only a portion of a circumference of the needle.
27. The needle of claim 17 , further comprising a coating covering at least a portion of the needle, a material of the coating layer having an acoustic impedance selected to substantially match an acoustic impedance of bodily tissue within which the needle is to be used.
28. The needle of claim 27 , wherein a speed of sound through the material of the coating layer is substantially less than that through the bodily tissue within which the needle is to be used.
29. The needle of claim 17 , wherein the needle includes a lumen extending therethrough.
30. The needle of claim 17 , further comprising a tip located at a distal end of the needle, the tip being formed angled relative to the longitudinal axis of the needle and adapted to receive therein bodily tissue penetrated by the needle.
31. A medical device, comprising:
a longitudinal body extending between a proximal end and a distal end and including a lumen extending therethrough, an outer surface of the longitudinal body including a plurality of first ultrasound reflecting depressions spaced apart from one another along at least a portion of a length of the longitudinal body, each of the first depressions extending along a longitudinal axis of the device and including a concave curve having a trough, the concave curve having a first portion extending from the trough to a first end of the first depression at a first curvature slope and a second portion extending from the trough to a second end of the first depression at a second curvature slope, the first curvature slope being steeper than the second curvature slope.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US16/246,846 US20190142397A1 (en) | 2008-12-30 | 2019-01-14 | Echogenic Enhancement for a Needle |
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US14147308P | 2008-12-30 | 2008-12-30 | |
US12/639,573 US9521993B2 (en) | 2008-12-30 | 2009-12-16 | Echogenic enhancement for a needle |
US15/351,023 US10213189B2 (en) | 2008-12-30 | 2016-11-14 | Echogenic enhancement for a needle |
US16/246,846 US20190142397A1 (en) | 2008-12-30 | 2019-01-14 | Echogenic Enhancement for a Needle |
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US15/351,023 Continuation US10213189B2 (en) | 2008-12-30 | 2016-11-14 | Echogenic enhancement for a needle |
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US20190142397A1 true US20190142397A1 (en) | 2019-05-16 |
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US12/639,573 Active 2033-02-27 US9521993B2 (en) | 2008-12-30 | 2009-12-16 | Echogenic enhancement for a needle |
US15/351,023 Active 2030-05-02 US10213189B2 (en) | 2008-12-30 | 2016-11-14 | Echogenic enhancement for a needle |
US16/246,846 Abandoned US20190142397A1 (en) | 2008-12-30 | 2019-01-14 | Echogenic Enhancement for a Needle |
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US12/639,573 Active 2033-02-27 US9521993B2 (en) | 2008-12-30 | 2009-12-16 | Echogenic enhancement for a needle |
US15/351,023 Active 2030-05-02 US10213189B2 (en) | 2008-12-30 | 2016-11-14 | Echogenic enhancement for a needle |
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US (3) | US9521993B2 (en) |
EP (1) | EP2384146B1 (en) |
JP (1) | JP5769026B2 (en) |
CA (1) | CA2747525C (en) |
WO (1) | WO2010078151A1 (en) |
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- 2009-12-22 WO PCT/US2009/069183 patent/WO2010078151A1/en active Application Filing
- 2009-12-22 EP EP09799830.6A patent/EP2384146B1/en active Active
- 2009-12-22 CA CA2747525A patent/CA2747525C/en not_active Expired - Fee Related
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2016
- 2016-11-14 US US15/351,023 patent/US10213189B2/en active Active
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2019
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Also Published As
Publication number | Publication date |
---|---|
CA2747525C (en) | 2017-02-28 |
US20170055961A1 (en) | 2017-03-02 |
JP2012513833A (en) | 2012-06-21 |
EP2384146A1 (en) | 2011-11-09 |
US10213189B2 (en) | 2019-02-26 |
US9521993B2 (en) | 2016-12-20 |
JP5769026B2 (en) | 2015-08-26 |
US20100168684A1 (en) | 2010-07-01 |
WO2010078151A1 (en) | 2010-07-08 |
CA2747525A1 (en) | 2010-07-08 |
EP2384146B1 (en) | 2015-10-28 |
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