CN213723998U - Working head of ultrasonic debridement instrument - Google Patents

Working head of ultrasonic debridement instrument Download PDF

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Publication number
CN213723998U
CN213723998U CN202021875017.9U CN202021875017U CN213723998U CN 213723998 U CN213723998 U CN 213723998U CN 202021875017 U CN202021875017 U CN 202021875017U CN 213723998 U CN213723998 U CN 213723998U
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working head
tip
liquid
head
inclined surface
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齐藤香奈代
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Gunze Ltd
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Gunze Ltd
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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
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B17/22004—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves
    • A61B17/22012—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement
    • A61B17/2202—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement the ultrasound transducer being inside patient's body at the distal end of the catheter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/3203—Fluid jet cutting instruments
    • A61B17/32037—Fluid jet cutting instruments for removing obstructions from inner organs or blood vessels, e.g. for atherectomy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M3/00—Medical syringes, e.g. enemata; Irrigators
    • A61M3/02—Enemata; Irrigators
    • A61M3/0279—Cannula; Nozzles; Tips; their connection means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B17/22004—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves
    • A61B2017/22005—Effects, e.g. on tissue
    • A61B2017/22007—Cavitation or pseudocavitation, i.e. creation of gas bubbles generating a secondary shock wave when collapsing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B17/22004—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves
    • A61B2017/22005—Effects, e.g. on tissue
    • A61B2017/22011—Combined types of vibration, e.g. ultrasonic and electrohydraulic
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
    • A61B2017/320069—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic for ablating tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
    • A61B2017/320072—Working tips with special features, e.g. extending parts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
    • A61B2017/320084—Irrigation sleeves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/3203—Fluid jet cutting instruments
    • A61B2017/32032—Fluid jet cutting instruments using cavitation of the fluid
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N7/00—Ultrasound therapy
    • A61N2007/0004—Applications of ultrasound therapy
    • A61N2007/0017—Wound healing

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Molecular Biology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Vascular Medicine (AREA)
  • Mechanical Engineering (AREA)
  • Hematology (AREA)
  • Anesthesiology (AREA)
  • Dentistry (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Surgical Instruments (AREA)

Abstract

The utility model provides a working head that ultrasonic debridement instrument had utilizes this working head, and at the in-process that emulsifies, gets rid of, its inside can not blocked by necrotic tissue, pollutants etc.. A working head of an ultrasonic debridement instrument configured to transmit ultrasonic vibration from a main body of the ultrasonic debridement instrument and to discharge a liquid supplied from the main body to a human body, the working head (5) comprising: an ejection port (52T) for ejecting the liquid toward the tip end side; and a plate-shaped working head (53), wherein the working head (53) has an inclined surface (53A) which collides with the liquid discharged from the discharge port (52T).

Description

Working head of ultrasonic debridement instrument
Technical Field
The utility model relates to a working head of an ultrasonic debridement instrument.
Background
An ultrasonic debridement instrument as an ultrasonic surgical treatment instrument emulsifies, removes, and cleans soft tissues of a human body by using vibration generated mechanically by ultrasonic waves and a liquid (e.g., physiological saline solution) ejected from a working head. Since the physiological saline or the like is ejected (sprayed) to the wound of the soft tissue while applying mechanical vibration and ultrasonic energy, bubbles of vacuum generated in the liquid are broken (cavitation). The shock wave thus generated is used to emulsify and remove necrotic tissue, contaminants, and the like while preserving healthy tissue, thereby achieving cleaning of the wound site. In addition, since the tissue having elasticity absorbs the ultrasonic vibration energy, blood vessels, nerves, and the like are preserved.
Fig. 5 (a) and (b) show the working head 10 of the ultrasonic debridement instrument. The working head 10 has an opening 10A, and the opening 10A is opened at a portion facing the human body at the time of operation, and the working head 10 is configured in a cup shape having a circular peripheral wall portion when viewed from the front. Further, an opening K for ejecting (spraying) a liquid into the head 10 is formed in the inner wall surface of the head 10 (see, for example, non-patent document 1).
Documents of the prior art
Non-patent document
Non-patent document 1: new method of debridement without scalpel, Jingtian Congratula, Dai Jing Yi Xue, 7 months and 29 days in 2014
https://medical.nikkeibp.co.jp/leaf/mem/pub/report/201407/537691.html
SUMMERY OF THE UTILITY MODEL
[ technical problems to be solved by the utility model ]
Since the working head of non-patent document 1 is configured to have a cup shape with a relatively large volume, necrotic tissue, contaminants, and the like that have been emulsified and removed may accumulate inside the working head, and the inside of the working head may be clogged with necrotic tissue, contaminants, and the like. Thus, it becomes difficult to eject the liquid from the opening. Therefore, in the process of emulsification and removal, there are many cases where it is necessary to frequently remove necrotic tissue, contaminants, and the like clogged in the working head, and the work efficiency is deteriorated, and improvement is desired at an early stage.
In view of the above circumstances, an object of the present invention is to provide a working head of an ultrasonic debridement instrument, the working head being capable of preventing the inside of the instrument from being clogged with necrotic tissue, contaminants, and the like during emulsification and removal.
[ solution for solving the problems ]
The utility model relates to an operating head that ultrasonic debridement instrument has constitutes for, from ultrasonic debridement instrument's main part transmission ultrasonic vibration, and will follow the liquid that the main part was supplied with is spout to the human body, its characterized in that, the operating head have with liquid is to tip side spun spout and constitute for platelike work head portion, and this work head portion has the inclined plane, this inclined plane with follow spout spun liquid collision.
According to this configuration, by ejecting the liquid while applying ultrasonic vibration to the wound portion of the tissue, the fragile necrotic tissue, contaminated material, and the like are gently scraped off by the edge portion of the working head. The scraped-off necrotic tissue, contaminating substances, etc. do not accumulate on the plate-shaped working head. Further, since the working head has the inclined surface which collides with the liquid discharged from the discharge port, the liquid colliding with the inclined surface can prevent necrotic tissue, contaminants, and the like from adhering thereto.
In the ultrasonic debridement instrument according to the present invention, the head portion may be flat and configured to have a width that increases toward the distal end side, and the inclined surface of the head portion may be inclined with respect to a discharge path extending from the discharge port.
As described above, the use of the working head having the wider width on the tip side enables effective treatment of a wide range of wounds. In addition, the angle of reflection of the liquid on the inclined surface can be freely set by adjusting the inclination angle of the inclined surface of the working head.
In the ultrasonic debridement instrument according to the present invention, the head portion may have a substantially oblong shape or a substantially oval shape that is long in the longitudinal direction of the head portion when viewed from the front of the inclined surface, and a concave portion that forms a curve of the inclined surface on one side in the plate thickness direction, the ejection port may be provided on a proximal end side inner surface of the concave portion, and the ejection port may be configured such that liquid ejected from the ejection port collides with a distal end side inner surface of the concave portion.
As described above, since the working head portion has a substantially elliptical or oval shape, it is possible to deal with a narrow portion of a wound when scraping necrotic tissue, contaminated materials, or the like against a complicated wound. Further, since the working head has a recess elongated in the longitudinal direction and the liquid is ejected in the longitudinal direction, the scraped necrotic tissue, contaminated material, and the like are less likely to accumulate in the recess. Further, since the liquid discharged from the discharge port collides with the tip-side inner surface of the concave portion, necrotic tissue, contaminants, and the like scraped off by the tip portion of the concave portion can be prevented from adhering to the tip-side inner surface of the concave portion.
[ effects of the utility model ]
As described above, according to the present invention, it is possible to provide a working head of an ultrasonic debridement instrument, which has a plate-shaped working head portion having an inclined surface that collides with a liquid ejected from an ejection port, and which is not clogged with necrotic tissue, contaminants, and the like during emulsification and removal.
Drawings
Fig. 1 is a perspective view of an ultrasonic debridement apparatus having a working head according to embodiment 1 of the present invention.
Fig. 2 shows the working head, wherein fig. 2 (a) is a bottom view and fig. 2 (b) is a side view.
Fig. 3 shows a working head according to embodiment 2 of the present invention, in which fig. 3 (a) is a bottom view and fig. 3 (b) is a side view.
Fig. 4 shows a working head according to embodiment 3 of the present invention, in which fig. 4 (a) is a bottom view, fig. 4 (b) is a side view, and fig. 4 (c) is a sectional view of the working head.
Fig. 5 shows a conventional work head, in which fig. 5 (a) is a side view and fig. 5 (b) is a view seen from the bottom side.
[ description of reference numerals ]
1: an ultrasonic debridement instrument; 2: a main body; 3: a foot switch; 4: a handpiece; 5: a working head; 6: a tube; 10: a working head; 10A: a bottom; 10B: a peripheral wall portion; 51: an external threaded portion; 52: an intermediate portion; 52A: a flange portion; 52T: an ejection port; 52 f: a flat surface; 53: a working head; 53A: an inclined surface; 53B: a conical surface; 54: a working head; 54A: an inclined surface; 54B: a conical surface; 54T: an inclined surface; 54 a: two end portions; 55: an intermediate portion; 55A: a flange portion; 55 f: a flat surface; 56: a working head; 56H: a recess; 56T: an ejection port; 56 a: a top-side inner surface; d: thickness; h: a maximum depth; k: an opening; s: the outer diameter size; t1: a discharge path; w1, W2, W3: a dimension in a width direction; θ 1, θ 2: the angle is specified.
Detailed Description
Hereinafter, three types of working heads according to the present invention will be described with reference to the drawings.
< embodiment 1 >
First, an ultrasonic debridement instrument as an ultrasonic surgical treatment instrument will be described. As shown in fig. 1, the ultrasonic debridement instrument 1 includes a main body 2, a foot switch 3, a hand piece 4, and a working head 5 detachably attached to a distal end of the hand piece 4. Debridement is a treatment method for cleaning a wound by removing necrotic tissue, pollutants, and the like.
The main body 2 includes an ultrasonic generator (not shown) that generates ultrasonic waves for transmission to the working head 5, and a liquid supply unit (not shown) that supplies liquid (here, physiological saline) to the working head 5.
The foot switch 3 is a switch electrically connected to the ultrasonic generator of the main body 2 and operable by foot, and is used to adjust the output band of the ultrasonic generator.
The handpiece 4 is connected to the main body 2 via a cable 7, and is made of, for example, a piezoelectric material, so that the vibration wave of the ultrasonic wave can be reliably propagated to the working head 5. Further, a synthetic resin tube 6 for supplying liquid from the liquid supply portion is connected to the main body 2. The tip of the tube 6 is connected to the cable 7, and the liquid is supplied to the handpiece 4 and then to the working head 5.
As shown in fig. 2 (a) and (b), the working head 5 is made of stainless steel, and has an external thread portion 51, an intermediate portion 52, and a working head portion 53 serving as a distal end portion, wherein the external thread portion 51 is screwed to an internal thread portion (not shown) formed at the distal end portion of the handpiece 4.
The intermediate portion 52 has a conical flange portion 52A, a 1 st cylindrical portion 52B, a 1 st conical portion 52C, and a 2 nd cylindrical portion 52D, wherein the flange portion 52A has a diameter larger than the outer diameter of the male screw portion 51 at the tip of the male screw portion 51, and the diameter becomes smaller closer to the tip side; the 1 st cylindrical portion 52B extends forward from the tip end of the flange portion 52A with substantially the same diameter; the 1 st conical portion 52C has a diameter that decreases from the tip of the 1 st cylindrical portion 52B toward the tip; the 2 nd cylindrical portion 52D extends forward from the tip of the 1 st conical portion 52C with substantially the same diameter. Flat surfaces 52f are formed on both left and right sides of the distal end portion of the 1 st cylinder portion 52B, and in the process of supporting the intermediate portion 52 with two fingers and cleaning the wound portion, the flat surfaces 52f reliably support the intermediate portion 52 so that the intermediate portion 52 does not rotate.
The head 53 is plate-shaped extending from the 2 nd cylindrical portion 52D and having a thickness smaller than that of the 2 nd cylindrical portion 52D, and is configured to have a shape in which the width is wider as it approaches the distal end side. The head part 53 has a scraping portion formed by bending a base end portion thereof at a predetermined angle θ 1 (130 degrees downward in fig. 2 b) toward the ejection port 52T described later so that the base end portion of the head part 53 is located on one side (the 2 nd cylindrical portion 52D side) with the ejection path T1 through which the liquid is ejected and the tip end portion thereof is located on the other side (the side away from the 2 nd cylindrical portion 52D). As described above, since the base end portion of the head portion 53 is bent, the head portion 53 crosses the discharge path T1, and thereby the head portion 53 has the inclined surface 53A which obliquely collides with the liquid discharged from the discharge port 52T. The inclined surface 53A is configured to be farther from the discharge port 52T as it approaches the tip end side.
Further, an ejection port 52T (see fig. 2 a) for ejecting the liquid supplied to the tube 6 to the tip side is formed on one side (the lower side in fig. 2 b) in the thickness direction of the 1 st conical portion 52C. The liquid discharged from the discharge port 52T is discharged toward the tip (front) side in a state of being substantially parallel to the axial center of the 2 nd cylindrical portion 52D, and changes its direction after colliding with the inclined surface 53A, and collides with the human tissue to be removed.
The head portion 53 is formed in a substantially triangular shape in plan view, and has a bent shape with an angle removed at both ends in the width direction of the distal end. In addition, in order to easily scrape off necrotic tissue, contaminated substances, and the like, the thickness of the tip portion of the working head 53 becomes thinner as it approaches the tip side. Specifically, as shown in fig. 2 (B), the distal end portion of the working head portion 53 has a tapered surface 53B on the upper surface (outer surface) side.
With the ultrasonic debridement instrument configured as described above, the liquid is ejected while applying ultrasonic vibration to the wound portion of the tissue, whereby the fragile necrotic tissue, contaminants, and the like are gently scraped off by the distal edge of the working head 53. The scraped necrotic tissue, contaminated material, and the like do not accumulate on the work head 53 formed in a plate shape. Further, since the working head 53 has the inclined surface 53A which collides with the liquid discharged from the discharge port 52T, the liquid colliding with the inclined surface 53A can prevent necrotic tissue, contaminants, and the like from adhering thereto. Further, since the working head 53 is formed in a shape having a wider width toward the distal end side, a wound of a wide range can be effectively treated. Further, by adjusting the inclination angle of the inclined surface 53A of the working head 53, the reflection angle of the liquid on the inclined surface 53A can be freely set.
< embodiment 2 >
Fig. 3 (a) and (b) show a head unit 54 according to embodiment 2 having a shape slightly different from that of the head unit 53 of the head 5 according to embodiment 1.
The working head 5 shown in fig. 3 (a) and (b) is made of stainless steel in the same manner as the working head 5 of embodiment 1, and includes: the external thread portion 51 is screwed to a female thread portion (not shown) formed at the distal end of the handpiece 4, and the intermediate portion 52 is screwed to a working head 54 having a different shape from the working head 53 of embodiment 1.
The intermediate portion 52 has a conical flange portion 52A, a 1 st cylindrical portion 52B, a 1 st conical portion 52C, and a 2 nd cylindrical portion 52D, wherein the flange portion 52A has a diameter larger than the outer diameter of the male screw portion 51 at the tip of the male screw portion 51, and the diameter becomes smaller closer to the tip side; the 1 st cylindrical portion 52B extends forward from the tip end of the flange portion 52A with substantially the same diameter; the 1 st conical portion 52C has a diameter that decreases from the tip of the 1 st cylindrical portion 52B toward the tip; the 2 nd cylindrical portion 52D extends forward from the tip of the 1 st conical portion 52C with substantially the same diameter. Flat surfaces 52f are formed on both left and right sides of the distal end portion of the 1 st cylinder portion 52B, and in the process of supporting the intermediate portion 52 with two fingers and cleaning the wound portion, the flat surfaces 52f reliably support the intermediate portion 52 so that the intermediate portion 52 does not rotate.
The head 54 is plate-shaped extending from the 2 nd cylindrical portion 52D and having a thickness smaller than that of the 2 nd cylindrical portion 52D, and is configured to have a width that becomes wider toward the distal end side. The base end portion of the working head 54 is located on one side (the 2 nd cylindrical portion 52D side) with the discharge path T1 through which the liquid is discharged interposed therebetween, and the tip end portion is located on the other side (the side away from the 2 nd cylindrical portion 52D), and the working head 54 has a scraping portion formed by bending the base end portion toward the discharge port 52T side by a predetermined angle θ 1 (130 degrees downward in fig. 2 (b)). As described above, since the base end portion of the head 54 is bent, the head 54 crosses the discharge path T1, and thus the head 54 has the inclined surface 54A which collides with the liquid discharged from the discharge port 52T. Unlike the head part 53 of embodiment 1, the head part 54 of embodiment 2 is configured such that both ends in the width direction of the distal end are formed into arc shapes having a radius of curvature larger than the radius of curvature of both ends in the width direction of the rounded distal end of the head part 53 of embodiment 1. The width-directional dimension W2 of the tip 54 is smaller than the width-directional dimension W1 of the tip 53 of embodiment 1, and the tip 54a have arc-like shapes with a large radius of curvature, so that the tip 54 can be inserted into a wound cavity (also referred to as a wound pocket, a cavity formed in a tissue). Thus, the working head 54 having no angular shape is configured to scrape off necrotic tissue, contaminants, and the like without damaging the wound.
Further, an ejection port 52T (see fig. 3a) for ejecting the liquid supplied to the tube 6 to the tissue of the human body is formed on one side (the lower side in fig. 3 b) in the thickness direction of the 1 st conical portion 52C. The liquid discharged from the discharge port 52T is discharged toward the tip (front) side in a state of being substantially parallel to the axial center of the 2 nd cylindrical portion 52D, and collides with the inclined surface 54A. By adjusting the inclination angle of the inclined surface 53A, the reflection angle of the liquid on the inclined surface 53A can be freely set. The inclined surface 54A is configured to be farther from the discharge port 52T as it approaches the tip end side.
The head 54 is formed in a plate shape and has an inclined surface 54T which collides with the liquid discharged from the discharge port 52T. The liquid discharged from the discharge port 52T is discharged toward the tip (front) side in a state of being substantially parallel to the axial center of the 2 nd cylindrical portion 52D, and changes its direction after colliding with the inclined surface 53A, and collides with the tissue of the human body to be removed. The head 54 is formed in a substantially triangular shape in plan view, and both ends in the width direction of the tip are formed in a bent shape after chamfering as described above. In addition, the tip portion of the working head 54 is formed to become thinner as the thickness becomes closer to the tip side, so that necrotic tissue, contaminated substances, and the like are easily scraped off. Specifically, as shown in fig. 3 (B), the distal end portion of the working head 54 has a tapered surface 54B on the upper surface (outer surface) side.
< embodiment 3 >
Fig. 4 (a) and (b) show a working head 5 according to embodiment 3, which is different from the working head 5 according to embodiment 1 in the shape of the intermediate portion 52 and the shape of the working head portion 53.
The working head 5 shown in fig. 4 (a) and (b) is made of stainless steel similarly to the working head 53 of embodiment 1, and includes: an external thread portion 51, an intermediate portion 55 having a shape different from that of the intermediate portion 52 of embodiment 1, and an operating head 56 having a shape different from that of the operating head 53 of embodiment 1, wherein the external thread portion 51 is screwed to an internal thread portion (not shown) formed at the distal end portion of the handpiece 4.
The intermediate portion 55 has a conical flange portion 55A, a 1 st cylindrical portion 55B, a 1 st conical portion 55C, and a 2 nd cylindrical portion 55D, wherein the flange portion 55A has a diameter larger than the outer diameter of the male screw portion 51 at the tip of the male screw portion 51, and the diameter becomes smaller closer to the tip side; the 1 st cylindrical portion 55B extends forward from the tip end of the flange portion 55A with substantially the same diameter; the 1 st conical portion 55C has a diameter that decreases from the tip of the 1 st cylindrical portion 55B toward the tip; the 2 nd cylindrical portion 55D extends forward from the tip of the 1 st conical portion 55C with substantially the same diameter, and is bent at a predetermined angle θ 2 (165 degrees downward in fig. 4 (b)) at a substantially central portion in the longitudinal direction. Flat surfaces 55f are formed on both left and right sides of the distal end portion of the 1 st cylindrical portion 55B, and in the process of supporting the intermediate portion 55 with two fingers and cleaning the wound portion, the flat surfaces 55f reliably support the intermediate portion 55 so that the intermediate portion 55 does not rotate. The flange portion 52A of embodiment 1, the flange portion 52A of embodiment 2, and the flange portion 55A of embodiment 3 have the same outer diameter S, but may have different outer diameters.
The working head portion 56 extends from the distal end of the 2 nd cylindrical portion 55D, and is formed in a substantially elliptical shape (or may be formed in a substantially elliptical shape) long in the longitudinal direction of the working head portion 56, and is configured in a substantially spoon shape having a curved concave portion 56H, and the curved concave portion 56H forms an inclined surface on one side in the plate thickness direction. Further, an ejection port 56T for ejecting the liquid supplied to the tube 6 toward the tissue of the human body is provided on the base end side inner surface of the recess 56H. The liquid discharged from the discharge port 56T is discharged straight in the longitudinal direction of the working head 56, and collides with the distal-end inner surface 56a of the recess 56H. In addition, the thickness becomes thinner as the working head 56 approaches the tip side. The liquid discharged from the discharge port 56T is discharged toward the tip (front) side in a state of being substantially parallel to the lower surface of the working head 56, and changes its direction after colliding with the tip-side inner surface 56a of the recess 56H as the inclined surface, and collides with the tissue of the human body to be removed.
As described above, the working head 56 is substantially oval and has a dimension W1 in the width direction whose lateral width is narrower than the dimension W1 in the width direction of the working head 53 according to embodiment 1 and the dimension W3 in the width direction of the dimension W2 of the working head 54 according to embodiment 2, and therefore, when scraping necrotic tissue, pollutants, and the like against a complicated wound, it is possible to cope with the narrow part of the wound. The working head 56 has a curved recess 56H formed on one surface (a surface on the tissue side of the human body) of the plate shape and elongated in the longitudinal direction. The depression 56H is formed in a substantially spoon shape having a maximum depth H of not more than half the thickness D of the working head 56. Therefore, since the recess 56H long in the longitudinal direction is provided and the liquid is ejected in the longitudinal direction, the scraped necrotic tissue, contaminated substances, and the like are hard to accumulate in the recess 56H. Further, since the liquid discharged from the discharge port 56T collides with the tip-side inner surface 56a of the recess 56H, necrotic tissue, contaminants, and the like scraped off by the tip of the recess 56H can be prevented from adhering to the tip-side inner surface 56a of the recess 56H.
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.
In the above-described embodiments 1 to 3, the total length of the working heads 5 is set to the same length L1, but may be set to different lengths.
In addition, although the working head 5 is detachably fixed to the hand piece 4 by a screw in the above-described embodiments 1 to 3, it may be configured such that a locking groove is formed in one of the working head 5 and the hand piece 4, and the other has a locking protrusion which can be locked to the locking groove so as to be unlocked, or the working head 5 and the hand piece 4 may be connected by welding or the like so as not to be detachable.

Claims (3)

1. An ultrasonic debridement instrument having a working head configured to transmit ultrasonic vibration from a main body of the ultrasonic debridement instrument and to discharge liquid supplied from the main body toward a human body, the working head characterized in that,
the working head has an ejection port for ejecting the liquid toward the tip side; and a plate-shaped head portion having an inclined surface that collides with the liquid discharged from the discharge port.
2. The ultrasonic debridement instrument according to claim 1, wherein the tip portion is flat and has a wider width on the tip side, and the inclined surface of the tip portion is inclined with respect to an ejection path extending from the ejection port.
3. The working head of the ultrasonic debridement instrument according to claim 1, wherein the working head portion has a substantially oblong shape or a substantially oval shape that is long in a longitudinal direction of the working head portion when viewed from a front side of the inclined surface, and has a concave portion that forms a curve of the inclined surface on one side in a plate thickness direction, the concave portion has the ejection port on a proximal end side inner surface thereof, and the ejection port is configured such that liquid ejected from the ejection port collides with a distal end side inner surface of the concave portion.
CN202021875017.9U 2019-09-03 2020-09-01 Working head of ultrasonic debridement instrument Active CN213723998U (en)

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