WO1989011250A1 - Echogenically enhanced surgical instrument and production method - Google Patents
Echogenically enhanced surgical instrument and production method Download PDFInfo
- Publication number
- WO1989011250A1 WO1989011250A1 PCT/US1989/001985 US8901985W WO8911250A1 WO 1989011250 A1 WO1989011250 A1 WO 1989011250A1 US 8901985 W US8901985 W US 8901985W WO 8911250 A1 WO8911250 A1 WO 8911250A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- surgical instrument
- blasting
- particle
- echogenically enhanced
- enhanced surgical
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/06—Needles ; Sutures; Needle-suture combinations; Holders or packages for needles or suture materials
- A61B17/06066—Needles, e.g. needle tip configurations
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
- A61B8/0833—Detecting organic movements or changes, e.g. tumours, cysts, swellings involving detecting or locating foreign bodies or organic structures
-
- 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
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/06—Needles ; Sutures; Needle-suture combinations; Holders or packages for needles or suture materials
- A61B17/06066—Needles, e.g. needle tip configurations
- A61B2017/061—Needles, e.g. needle tip configurations hollow or tubular
-
- 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
- the present invention relates to devices for use in an ultrasonic imaging system and more particularly to an echogenically enhanced surgical instrument.
- ultrasonic imaging techniques have become increasingly prevalent in clinical diagnoses, and more particularly in obstetrics, gynecology and urology.
- Specialists in these disciplines use ultrasound to image a wide variety of medical abnormalities including malignant and non-malignant cysts and tumors and fetal status in utero as well as "real-time" monitoring of needle location during such procedures as fetal blood sampling, amniocentesis, tissue aspiration biopsy and core biopsy.
- Considerable effort has been expended to significantly enhance the ultrasound image of a needle, or at least its point or tip, in order to more accurately pinpoint its placement or advancement over real-time ultrasonic guidance.
- echogenicity refers to the relative, intrinsic or innate degree or extent that a surface reflects incident ultrasound wave energy directly back t the sensor, which is proximal to the source or emitter.
- the degree of echogenicity is directly interdependent on two primary factors, according to essential ultrasound physics: (1) the density of the "target” receiving and reflecting the sound energy, and (2) the elasticity of the "target” being ultrasonically imaged. These two factors are professed to be the essential reasons why ai and/or water in tissue or organs are more "echogenic” or alter the echogenicity.
- (dense) metal such as the shaft of a needle.
- U.S. Patent No. 4,401,124 issued to Guess et al. outlines some of the problems associated with monitoring the insertion and guidance of needles and other instruments.
- the Guess et al. patent also discloses a proposed solution to the monitoring problem by providing in an ultrasound pulse-echo imaging system, a defraction grating disposed on the surface of the surgical instrument.
- the defraction grating is disclosed to have a specified distance D between the depth of adjacent grooves, that distance D being a function of various parameters including the center wavelength ⁇ o of the transducer and the angle ⁇ between the incident beam and a line along the surface of the instrument and perpendicular to the grooves.
- What is needed is a device which provides more accurate monitoring of a surgical instrument such as a needle inserted into the body, which does not require a specific angle of orientation for its efficiency, and which is inexpensive to manufacture.
- a surgical instrument which has been treated to significantly enhance the ultrasound image of a portion of the instrument.
- a needle which is to be inserted and guided through the body for. fetal blood sampling, amniocentesis or tissue aspiration biopsy, for example, is used with an ultrasound imaging system to provide real-time monitoring of the needle location.
- a specific portion of the exterior surface of the needle is uniformly and randomly particle-blasted with particles approximately 50 microns in diameter.
- Various particulate materials such as sand (silicon dioxide), silicon carbide and metal silicates can be used.
- FIG. 1 is a side, elevational view of the end of a standard, virgin needle oriented axially 90° with respect to the direction of the incident ultrasound beam.
- FIG. 2 is a side, elevational view of the needle of FIG. 1 axially oriented approximately 60° with respect to the incident ultrasound beam.
- FIG. 3 is a side, elevational view of the end of a needle in accordance with the preferred embodiment of the present invention.
- FIG. 4 is a bottom view of the needle of FIG. 3.
- FIG. 5 is a bottom view of the needle of FIG. 4 which is oriented approximately 60° relative to the incident ultrasound beam.
- FIG. 6 is a side, elevational view of a portion of a needle in accordance with another embodiment of the present invention.
- FIG. 7 is a side, elevational view of a portion of a needle in accordance with another embodiment of the present invention.
- the standard ultrasonic imaging system employed in the medical field is based upon the pulse-echo method wherein pulses of ultrasonic energy are periodically generated by a sizable piezoelectric transducer. Each short pulse of ultrasonic energy is focused to a narrow beam to pass into the patient's body wherein it eventually encounters the desired "target" surface. A portion of the ultrasonic energy is reflected back from the target surface to the ultrasound sensor for correlation and interpretation.
- echogenicity refers to the relative intrinsic or innate degree or extent that a surface reflects incident ultrasound wave energy directly back to the sensor, which is proximal to the source or emitter of the ultrasound system.
- FIG. 1 Shown in FIG. 1 is a standard, virgin needle 10 made of an appropriate material such as stainless steel. Needle 10 has a smooth outer surface 16 and is of the type commonly in use in the medical field. Needle 10 is most echogenic when it is at a right angle to incident ultrasound beams 11. The majority of the reflected beam 12 are picked up by a sensor (shown schematically at 13) which is located proximal to the source or emitter (show schematically at 14) of incident beams 11. When needle 10 is oriented at an angle to the emitter and sensor, the "density" of direct echoes returned or reflected to the sensor decreases (FIG. 2). Although the density and elasticity of needle 10 do not change, the echogenicity of needle 10 is significantly decreased as the introductory or advancement angle of the needle 10 is varied away from 90° with respect to incident beams 11.
- FIG. 3 Shown in FIG. 3 is a needle 20 prepared in accordance with the preferred embodiment of the present invention.
- a virgin needle such as needle 10 shown in FIG. 1 is treated by particle-blasting a portion of the needle surface 21.
- the particle-blasted portion 22 is disposed upon outwardly facing surface 21 of needle 20 corresponding to that portion of the instrument which is desired to be monitored.
- the absolute location of the tip or end 23 of needle 20 it is desirable to know the absolute location of the tip or end 23 of needle 20.
- a single band approximately 2 to 3 millimeters in width is therefore created about the entire circumference of needle 20 just behind the trailing edge 25 of beveled opening 26 of needle 20 (FIGS. 3 and 4).
- the particle-blasting of portion 22 includes the use of appropriate particles such as silicon dioxide, silicon carbide or other metal silicates.
- the particulate material of the preferred embodiment is silicon carbide.
- the particles used are in the range between sub-micron and 500 microns with the preferred particle size being between 1 and 100 microns. Using various particle sizes in the preferred range would add to the desired uniforml roughened topography. However, the most preferred particle size is approximately 50 microns.
- the treatmen of needle 20 consists of uniformly particle-blasting the desired portion 22.
- the resulting surface portion 22 does not need to be deeply etched, blasted or mechanically eroded to significantly enhance the echogenicity of needle 20.
- the resulting pits or erosio need only be on the order of about 50 microns in depth. This, of course, will depend on the manner in which the particle-blasting is performed and upon the size . particles used. The important factor is that portion 22 is uniformly roughened to produce an irregular surface topography.
- a needle 20 treated in accordance with th present invention exhibits a relatively high density of direct echoes capable of collection by the sensor irrespective of the angle of the particle-blasted needle 20 relative to the incident ultrasound beams 11.
- needle 33 contains multiple treated portions or one or more treated portions which have various geometric shapes.
- needle 33 has a treated circumferential band 29 surrounding needle 33 just behin trailing edge 25 of beveled opening 26 as well as a treated beveled, circumferential portion 30 at the extreme leading edge of beveled opening 26.
- the entire end of needle 35 is treated producing a circumferential band 36 around needle 35 from its tip 37 to a ring 40 somewhere behind trailing edge 38 of bevelled portion 39.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/194,861 US4869259A (en) | 1988-05-17 | 1988-05-17 | Echogenically enhanced surgical instrument and method for production thereof |
US194,861 | 1988-05-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1989011250A1 true WO1989011250A1 (en) | 1989-11-30 |
Family
ID=22719170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1989/001985 WO1989011250A1 (en) | 1988-05-17 | 1989-05-09 | Echogenically enhanced surgical instrument and production method |
Country Status (8)
Country | Link |
---|---|
US (1) | US4869259A (en) |
EP (1) | EP0414775A4 (en) |
JP (1) | JPH04500614A (en) |
AU (1) | AU627732B2 (en) |
CA (1) | CA1306917C (en) |
ES (1) | ES2011578A6 (en) |
GR (1) | GR1000310B (en) |
WO (1) | WO1989011250A1 (en) |
Cited By (3)
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WO2008154200A1 (en) * | 2007-06-08 | 2008-12-18 | Cook Critical Care Incorporated | Continuous nerve block assembly |
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EP0833590A1 (en) * | 1995-04-28 | 1998-04-08 | Douglas O. Chinn | Cryosurgical integrated control monitoring system and method |
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Also Published As
Publication number | Publication date |
---|---|
CA1306917C (en) | 1992-09-01 |
EP0414775A1 (en) | 1991-03-06 |
AU3564789A (en) | 1989-12-12 |
ES2011578A6 (en) | 1990-01-16 |
EP0414775A4 (en) | 1991-05-08 |
GR1000310B (en) | 1992-05-12 |
GR890100326A (en) | 1990-03-12 |
US4869259A (en) | 1989-09-26 |
JPH04500614A (en) | 1992-02-06 |
AU627732B2 (en) | 1992-09-03 |
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